JP2000079287A - Embroidery sewing machine with needle thread changing device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In an embroidery sewing machine with a needle thread changing device,
By making it easy to understand the order setting of the automatic threading of each color thread constituting the embroidery pattern, it is possible to prevent the embroidery sewing with the wrong color thread after the automatic threading. SOLUTION: An upper thread selectively drawn out from a thread supply source having a plurality of upper threads to a predetermined thread path is conveyed so as to protrude near the eye of the sewing needle and inserted into the eye of the sewing needle. An upper thread changing device for changing the upper thread, which is selectively changed from a thread supply source by the upper thread changing device, and which can set an order of the upper thread to be automatically threaded; A pattern display unit 73 for disassembling and displaying one embroidery pattern selected by the pattern selection unit for each color thread in an embroidery sewing machine with a needle thread changing device provided with a pattern selection unit capable of selecting a pattern; , Thread hook setting means 76, 77, 78, 7
The threading display unit 75 includes a threading display unit 75 for displaying the threading order set in step 9 for each color thread.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embroidery sewing machine with an upper thread changing device, such as an embroidery sewing machine for performing embroidery sewing using a plurality of different colors of upper threads.

[0002]

2. Description of the Related Art Generally, in an embroidery sewing machine, a plurality of upper threads of different colors are selectively used for replacement. Each time the upper thread is replaced, the upper thread is passed through the eye of a sewing needle. Since the operation is troublesome, various proposals have been made for devices capable of automatically performing the threading operation. For example, according to Japanese Patent Application Laid-Open No. 61-89365, a large number of yarns are guided in parallel, and a frame provided with a draw-in device for maintaining a predetermined amount of yarn for each yarn is selectively moved so that the posture is horizontal at the tip. Rotate the arm provided with the thread holding section that is kept at
2. Description of the Related Art There is known a needle thread changing device that allows a thread carried by a thread clamp to be inserted through a needle hole by a thread insertion tool provided in a sewing machine main body.

[0003]

However, in a conventional embroidery sewing machine with a needle thread changing device, a pattern display section for disassembling a selected embroidery pattern for each color thread and displaying the embroidery pattern is provided. Since the threading order display section for displaying the thread setting order is provided separately, the order setting of the automatic threading of each color thread constituting the embroidery pattern is difficult to understand at a glance. Conventionally, the automatic threading operation cannot be interrupted. Conventionally, when the embroidery sewing is interrupted and the power is turned off, the continuation of the embroidery sewing and the setting of the automatic thread replacement must be performed again after the power is turned on, which is troublesome. As described above, conventionally, there is a possibility that embroidery sewing may be performed with an incorrect color thread after automatic threading.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an embroidery sewing machine with a needle thread changing device which prevents embroidery sewing with an incorrect color thread after automatic threading. That is, the present invention makes it easier to understand the automatic thread setting order setting of each color thread constituting the embroidery pattern in the embroidery sewing machine with the upper thread changing device. Further, the present invention makes it possible to interrupt the automatic threading operation in an embroidery sewing machine with a needle thread changing device. Further, according to the present invention, in an embroidery sewing machine with a needle thread changing device, when the embroidery sewing is interrupted, the information on the interruption of the embroidery sewing and the automatic thread changing information are stored, and the embroidery sewing is performed by re-input after the power is turned off. It is possible to continue.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, an upper thread selectively drawn out from a thread supply source having a plurality of upper threads to a predetermined thread path is sewn with a sewing needle. An upper thread changing device that is conveyed so as to protrude in the vicinity of the eye hole of the sewing needle and inserted into the eye hole of the sewing needle, and a needle thread that is selectively changed from a thread supply source by the upper thread changing device and automatically threaded. In an embroidery sewing machine with a needle thread changing device, comprising a thread hook setting means for setting an order and a pattern selection means for selecting an embroidery pattern, the one embroidery pattern selected by the pattern selection means is displayed. A pattern display unit that disassembles and displays each color thread, and a thread hook display unit that displays the thread hooking order set by the thread hook setting unit for each color thread, and a display unit that includes a display unit. Features.

Here, the thread supply source may be any thread supply source provided above the end of the sewing machine opposite to the sewing needle and having a plurality of upper threads. As the upper thread changing device, a thread transfer means for selectively capturing the upper thread drawn from the thread supply source by the thread transport means and pulling the upper thread to the thread path and transporting the upper thread near the eye of the sewing needle and Threading means for inserting the upper thread conveyed by the thread transfer means into the eye of the sewing needle, and the upper thread selectively drawn out from the thread supply source to the thread path. Any structure may be used as long as it has a function of transporting so as to protrude into the vicinity of the eye of the sewing needle and inserting it into the eye of the sewing needle. The thread hook setting means includes an order setting switch and a thread setting switch, but any configuration having a function capable of setting the order of the upper thread for automatic thread hooking may be used. The pattern selecting means includes a touch panel that also serves as a display unit, but may have any configuration as long as it has a function of selecting an embroidery pattern. As the display means, a liquid crystal display panel may be used, but other display elements may be used. Any display means may be used as long as the pattern display section and the thread hooking display section are arranged side by side for each color thread.

As described above, according to the first aspect of the present invention, there is provided a pattern display section for disassembling and displaying one embroidery pattern selected by the pattern selection means for selecting an embroidery pattern for each color thread. The threading order set by the threading setting means is displayed correspondingly for each color thread. An embroidery sewing machine with a needle thread changing device, comprising a display unit and a display means comprising a display unit. Therefore, the order setting of the automatic threading of each color thread constituting the embroidery pattern is easy to understand.

According to a second aspect of the present invention, there is provided the embroidery sewing machine with the upper thread changing device according to the first aspect, wherein the upper thread changing device sets the thread setting order of the upper thread by the thread setting device. If the sewing machine is started without being performed, automatic threading is sequentially performed from one end of the plurality of upper threads set in the thread supply source.

Thus, according to the second aspect of the present invention, the upper thread changing device according to the first aspect activates the sewing machine without setting the thread threading order of the upper thread by the thread thread setting means. In this case, since the embroidery sewing machine with the needle thread changing device automatically starts threading from one end side of the plurality of upper threads set in the thread supply source, the upper thread is connected to the thread supply source in one end in the order of use. If the setting is performed from the section side, the labor of inputting the order setting of the automatic threading to the threading setting means can be omitted.

[0010] The third aspect of the present invention is the first or second aspect.
An embroidery sewing machine with an upper thread changing device according to the above aspect, characterized in that the setting of the thread threading order of the upper thread by the thread thread setting means can be changed even after the sewing machine is started.

According to the third aspect of the present invention, the setting of the order of threading of the upper thread by the threading setting means according to the first or second aspect can be changed even after the sewing machine is started. Since the embroidery sewing machine is attached, even after the automatic thread exchange and the embroidery sewing start, the order setting of the automatic thread hooking can be changed and input.

Further, the invention according to claim 4 is a yarn transporting means for selectively capturing the upper yarn from a yarn supply source having a plurality of upper yarns and drawing out the upper yarn to a predetermined yarn path. Thread transfer means for gripping the upper thread drawn out to the thread path and transporting it so as to protrude near the eye of the sewing needle, and inserting the upper thread transported by the thread transfer means into the eye of the sewing needle. An automatic thread for selectively capturing, transporting and threading an upper thread from a thread supply source by the thread transporting means, the thread transferring means and the threading means in an embroidery sewing machine with a needle thread changing device provided with a threading means. A thread suspending operation unit for suspending a suspending operation, and a control unit suspending the automatic thread suspending operation by the thread conveying unit, the thread passing unit and the thread passing unit by the thread suspending operation by the thread suspending operating unit. , A configuration with .

Here, the yarn conveying means may be any as long as it selectively captures the upper yarn from the yarn supply source and draws it out to a predetermined yarn path, and the configuration of the driving source and the conveying mechanism is arbitrary. As the thread transfer means, those having a thread transfer gripping portion for gripping the upper thread drawn out to a predetermined thread path by the thread transport means and transporting it so as to protrude near the eye hole of the sewing needle, The yarn feeder may be of any type, and the configuration of the drive source and the yarn transfer mechanism is arbitrary. Examples of the threading means include those having a threading hook that allows the upper thread conveyed by the thread passing means to pass through the eye of the sewing needle. However, other threading members may be used. The structure of the mechanism is arbitrary. The threading interrupting operation unit is, for example, a threading switch. The threading operation is interrupted by pressing the threading switch and then pressing it again. It may be a switch. The control means includes a microcomputer, a ROM, a RAM, an I / O port,
It is composed of an EEPROM or the like.

As described above, according to the fourth aspect of the present invention, the automatic yarn hooking device selectively captures, conveys, and threading the upper thread from the thread supply source by the thread conveying means, the yarn passing means, and the threading means. An embroidery sewing machine with a needle thread changing device, comprising When the interruption is input by the hook interruption operation section, the automatic thread hooking operation can be interrupted by the control means.

According to a fifth aspect of the present invention, there is provided the embroidery sewing machine with the upper thread changing device according to the fourth aspect, wherein the control means controls the automatic threading operation by a threading suspending operation of the threading suspending operation section. After the interruption of the above, when the thread suspending operation timing is before the upper thread is captured by the thread transporting means, the yarn transporting means is returned to the initial position, and the thread suspending operation timing is changed to the upper thread by the thread transporting means. After capturing, the yarn transfer means is moved to the upper thread gripping position by the yarn transfer means, the yarn transfer means grips the upper thread, and then the yarn transfer means is returned to the initial position. Which is characterized in that:

Thus, according to the fifth aspect of the present invention, after the interruption of the automatic threading operation by the interruption operation, the control means of the fourth aspect sets the time of the threading interruption operation to the upper thread by the thread conveying means. When the yarn transporting means is returned to the initial position before the capture of the upper thread, the thread transporting means is moved to the upper thread gripping position by the thread transfer means when the thread suspending operation is performed after the upper thread is captured by the thread transporting means. An embroidery sewing machine with a needle thread changing device that makes the thread transfer means return to the initial position after the thread transfer means grips the needle thread. Since the operation of the yarn conveying means is changed between before and after the capture, the yarn is not entangled and the time loss can be reduced.

According to a sixth aspect of the present invention, an upper thread selectively drawn out from a thread supply source having a plurality of upper threads to a predetermined thread path is conveyed so as to protrude near the eye hole of the sewing needle. A needle thread changing device for inserting the needle thread into the eye of the sewing needle, and thread hook setting means for selectively changing the order of the upper thread to be automatically changed from the thread supply source by the needle thread changing device and automatically threaded. In an embroidery sewing machine with an upper thread changing device for performing embroidery sewing with the upper thread automatically changed in accordance with the threading order set by the threading setting means, when the embroidery sewing is interrupted, the embroidery sewing is interrupted. And a storage unit for storing information and automatic thread change information by the upper thread change device even after the power of the sewing machine is cut off.

Here, the storage means includes an EEPROM included in a central control unit (CPU).
A RAM may be used.

As described above, according to the sixth aspect of the present invention, the yarn set by the yarn hook setting means capable of selectively setting the order of the upper yarn to be automatically hooked by changing the yarn from the yarn supply source. When the embroidery stitching with the upper thread automatically changed according to the hanging order is interrupted, the embroidery stitching with the upper thread changing device provided with a storage means for storing the embroidery stitching interruption information and the automatic thread changing information even after the power is turned off. It is a sewing machine and the information on the interruption of automatic thread change and embroidery sewing is stored even after the power is turned off.Therefore, even if the embroidery sewing is interrupted and the power is turned off, if the power is turned on again, the automatic thread change The embroidery sewing is continued.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an embroidery sewing machine with a needle thread changing device according to the present invention will be described below with reference to FIGS.
It will be described based on. FIG. 1 is a schematic perspective view showing an automatic threading device and an automatic threading device of an embroidery sewing machine as an example of an embroidery sewing machine with a needle thread changing device to which the present invention is applied, and FIGS. FIG. FIG. 14 is a longitudinal sectional view showing an example of the upper thread presence detecting means, and FIG. 15 is a diagram showing an example of an output signal of the upper thread presence detecting means.

First, as shown in FIG. 2, an upper shaft 1 is a main motor (not shown) (see sewing machine motor 11 in FIG. 17).
The upper shaft shielding plate 2 is composed of a plurality of fan-shaped plates and is fixed to an intermediate portion of the upper shaft 1 by a photosensor (not shown) (see the main shaft sensor 12 in FIG. 17). , A signal of the rotational phase position of the upper shaft 1 is obtained. A counterweight 3 is fixed to one end of the upper shaft 1, and the swinging end of the crank rod 4 rotatably connected to the counterweight 3 is in the middle of a needle bar 5 that holds a sewing needle N. It is rotatably connected to the fixed needle bar holder 6. A balance 8 is connected to a base side of the crank rod 4 via a crank 7, and a swing end portion of the balance 8 is formed in a thread hooking portion 8 a bent in a “U” shape. A protruding portion 8b for preventing needle thread slip is formed in the middle of the portion 8.

In addition, a thread changing device is provided at the upper part of the sewing machine main body for selectively changing and transferring a plurality of upper threads of different colors. As shown in FIG. 1, the thread changing device includes a thread standby supply means (thread supply source) 100 fixed to a sewing machine frame so as to hold each of the upper threads, and is pulled out from the thread standby supply means 100. Weighing thread 8
And a yarn transporting means 200 for pulling out to the yarn transferring means 500 through the position of. Yarn standby supply means 100
Is disposed above the sewing machine end opposite to the sewing needle N,
The yarn supply units 101, 101 arranged in the direction of the upper shaft 1 (FIG. 1)
Are shown in two figures). The yarn supply unit 10
As shown in FIG. 13 in an enlarged manner, a pair of thread holding plates 102 and 103 for elastically sandwiching and holding the distal end portion of the upper thread A to be supplied are provided in close contact with each other.

That is, the pair of thread holding plates 102 and 103
Are tightly contacted by the urging force of a compression coil spring 105 mounted on a shaft 104 erected on one side of the thread holding plate 102. The pair of thread holding plates 102 and 103 are guided from the back side of the thread standby supply means 100 to the upper side of the thread supply unit 101 through a base tension plate 106 provided integrally with one of the thread holding plates 102. The inserted upper thread A is inserted and sandwiched between both thread holding plates 102 and 103 from the near side of the sewing machine, and the upper thread A is inserted into both thread holding plates 102 and 103.
It is set so that it hangs by a predetermined amount from between.

Further, the front end portions of the both thread holding plates 102 and 103 on the front side of the sewing machine are bent obliquely in a direction away from each other to have a thread guiding function. That is, each of the thread holding plates 102 and 103 is formed such that the opening at the distal end thereof is enlarged toward the yarn transporting means 200 described below.
The setting of each upper thread A is easily performed through the tip side thread guide section 03. Further, as shown in FIG.
At a predetermined position adjacent to 02 and 103, a thread cutting cutter 107 for cutting the upper thread A pulled out from both thread holding plates 102 and 103 to a predetermined length is provided upright. The thread cutter 107 is provided with both thread holding plates 102 and 103.
The thread is fixed to a support frame 108 having a guide groove for guiding the upper thread A set between them, and is disposed at a predetermined height position with respect to a thread gripping section (thread catching section) 203 of the thread conveying means 200. ing. Then, the tip of the upper thread A set between the two thread clamping plates 102 and 103 and pulled out from the lower edge side thereof is cut to a predetermined length by the thread cutter 107, and the thread is supplied from the thread supply unit 101. The length of the upper thread A that is hung down is set to a length that can be easily received by the thread conveying means 200.

As described above, the upper thread A is connected to the thread cutter 10.
7, the upper thread A comes into contact with the lower edge portion of the thread holding plate 102. However, at this time, the lower edge portion of the thread holding plate 102 is inclined so that the upper thread A slides from the near side to the far side. Due to this inclination,
Due to the tension caused by the thread cutting operation, the upper thread A
It is surely set by being invited between 02 and 103.
Further, at the front end side portion of the thread holding plate 103, a projection (not shown) projecting toward the other thread holding plate 102 is formed, and the projection is formed in the concave portion 1 on the thread holding plate 102 side.
02a (see FIG. 13). This fitting prevents the upper thread A once set between the two thread holding plates 102 and 103 from coming off.

After the sewing is completed, the tip of the upper thread A left from the thread supply unit 101 to the sewing needle N is pulled back to the thread supply unit 101 on the back side of the thread supply unit 101. A thread picking mechanism (thread picking means) is provided.
That is, the yarn picking mechanism of the yarn standby supply means 100 is the same as that shown in FIG.
As shown in an enlarged view in FIG. 1, a pair of yarn pull-back rollers (yarn pulling rollers) 1 configured to contact and separate from each other
09a, 109b, and one of the drive-side yarn pull-back rollers 109a is constantly rotated via an intermediate gear 111 that transmits the rotational driving force of a not-shown thread pulling stepping motor (see reference numeral "130" in FIG. 17). Being driven. The other driven side thread pull-back roller 109b is rotatably mounted on a swing end portion of a roller support bracket 113 that is swingably mounted by a pivot pin 112. When the roller support bracket 113 is provided with a biasing force in the rotational direction by the torsion coil spring 114, the driven-side thread pull-back roller 109b is separated from the drive-side thread pull-back roller 109a.

Then, the roller support bracket 113 is
As will be described later, by being rotated in response to the rotational urging force of the torsion coil spring 114 in conjunction with the operation of the yarn transporting means 200, the driven yarn pull-back roller 109b is rotated.
Is brought into contact with the yarn pull-back roller 109a on the driving side. At the same time, the driven side yarn pull-back roller 109a
A non-illustrated driven gear provided on the drive meshes with a drive gear (not shown) provided on the drive-side thread pull-back roller 109b, and these two thread pull-back rollers 109a, 109b
The upper thread A is drawn toward the thread supply unit 101 while rotating in contact with each other. A yarn guide 115 is provided upright in front of both the yarn pulling-back rollers 109a and 109b of such a yarn picking mechanism. Two units are provided for each A. Each of these yarn reservoirs is formed of a hollow box-like body for storing the elongated upper yarn A which is pulled back to the yarn supply unit 101 by the yarn drawer mechanism.
This is to prevent the upper threads from being entangled by partitioning the storage space every time. In addition, a thread guide (not shown) is provided at the back side of the thread pool.

The yarn transfer means 200 grips the upper thread A of any one of the yarn supply units 101, 101 of the yarn standby supply means 100, passes the position of the balance 8, and holds the yarn transfer means 500. A portion 526 (see FIGS. 1 and 11) is provided. That is, as shown in an enlarged manner in FIG. 12, the operation pin 202 a provided on the yarn selection carriage 202 engages with the feed screw 201 arranged substantially parallel to the upper shaft 1. As a result, the yarn selection carriage 202 reciprocates in the left-right direction. A pair of pins 204, 204 are mounted on the thread selection carriage 202.
The movable plate 205 is slidably disposed in the front-rear direction by the pins 204. On the front side of the moving plate 205, a yarn gripping portion 203 for gripping a yarn end portion of the upper yarn A pulled out from each yarn supply portion 101 is provided. A rack gear 206 is formed on the movable plate 205 at a side edge portion in the front-rear direction.
The rack gear 206 is used for the transfer stepping motor 2.
The moving plate 205 reciprocates in the front-rear direction by being meshed with the intermediate gear 208 that transmits the rotation output of the rotation gear 07. A pair of thread holding plates 210 and 211 constituting the thread gripping portion 203 are provided on the front side of the moving plate 205 on the sewing machine.

In the pair of thread holding plates 210 and 211 constituting the thread gripping portion 203, one fixed side of the thread holding plate 210 is configured so that the front side edge of the movable plate 205 rises substantially at a right angle. The other pinching plate 211 on the rocking side is rotatably attached to a rocking shaft 212 erected on the moving plate 205. The swing-side thread holding plate 211 is pressed against the fixed-side thread holding plate 210 by the rotational urging force of the torsion coil spring 213 mounted on the swing shaft 212. The upper thread A is grasped by the two thread clamping plates 210 and 211 being in close contact with each other. Also,
An opening / closing operation pin 214 is fixed to an intermediate portion of the thread holding plate 211 on the swing side so as to protrude downward. The operation pin 214 is an opening / closing operation cam 221 (see FIG. 13) disposed immediately before each thread supply unit 101 of the thread standby supply means 100 when the moving plate 205 moves toward the back of the sewing machine.
Abuts on the front side inclined portion 221a (see FIG. 13), whereby the thread holding plate 211 on the swinging side is rotated against the rotational urging force of the torsion coil spring 213. As a result, the swing-side thread holding plate 211 is fixed to the fixed-side thread holding plate 210.
Separate from. Further, the operating pin 214 is connected to the opening / closing operating cam 2.
When passing through the rear-side linear portion 221b (see FIG. 13) of the oscillating side 21, the oscillating-side thread holding plate 211 is rotated to the original closed position by the rotational urging force of the torsion coil spring 213. The thread clamping plate 211 is fixed to the thread clamping plate 210 on the fixed side.
Adhered to.

Each of the yarn supply portions 101 of the yarn standby supply means 100 is located immediately above the pair of yarn holding plates 210 and 211.
There is provided a guide groove 215 that opens toward. The guide groove 215 is provided with a plate-like guide member 209 extending horizontally from the upper edge portion of the fixed-side thread holding plate 210 so as to cover the upper side of the swing-side thread holding plate 211. It is formed so as to cut out toward the side.
The opening of the guide groove 215 is arranged so as to be able to face the opening of the pair of thread holding plates 102 and 102 of each thread supply unit 101, and the yarn end pulled out from each thread supply unit 101. The part is introduced into the thread holding plates 210 and 211. Here, the plate-shaped guide member 20
9 is formed so as to be slightly upwardly curved, and the curved front end 209a is positioned on the lower side of the thread holding plate 102 of the thread standby supply means 100 with respect to the lower edge.
They are slightly wrapped in the height direction and come into contact with each other. Thereby, the upper thread A is guided into the guide groove 215. In this embodiment, only one guide plate defining the guide groove 215 is curved upward, but the guide plate on the opposite side across the guide groove 215 is curved upward. Is also possible.

A thread locking groove 216 extends at the deepest portion of the guide groove 215. This thread locking groove 216 is
The upper thread in the guide groove 215 is formed so as to extend in the backward movement direction of the yarn transport means 200, and when the yarn selection carriage 202 of the yarn transport means 200 moves forward toward the balance 8 side. It is introduced into the stop groove 216. This thread locking groove 2
Once the upper thread is introduced into 16, the upper thread does not fall out of the groove even when the thread gripping part 203 moves in the front-rear direction. Further, on the moving plate 205, a thread picking operation arm 217 is attached to a side edge portion opposite to the rack gear 206 so as to be swingable by a swing shaft 218. The thread take-up operation arm 217 has a swing shaft 218.
Is held at a predetermined position by the rotational urging force of the torsion coil spring 219 attached to the first coil. When the thread gripper 203 moves to the back side (rearward side) of the sewing machine, the thread picking operation arm 217 projects the protrusion 113a of the roller support bracket 113 of the thread picking mechanism of the thread standby supply unit 100 (see FIG. 13). Are provided so as to abut against. That is, the roller support bracket 113 is rotated by the pressing force of the thread pulling operation arm 217 to bring the driven-side thread pull-back roller 109b into contact with the drive-side thread pull-back roller 109a.

As shown in FIGS. 1 and 7, the needle bar 5 is swingably mounted on a needle swing table 401 constituting a needle swing mechanism 400 described later. The threading means 300 is provided so as to be adjacent to the swinging swing table 401. As shown in FIG. 2, a threading positioning stopper 302 constituting the threading means 300 is screwed to a position immediately above the needle bar holder 6 fixed to the needle bar 5. A sewing needle N is attached to the portion by a needle screw 9 a provided on the needle stopper 9. A thread guide 10 is attached to the needle stopper 9 so as to guide the upper thread to the eye of the sewing needle N.

As shown in FIG. 7, the upper end portion of the needle swing table 401 supporting the needle bar 5 has a left-right swing shaft 403 extending in the front-rear direction, and penetrates the left-right swing shaft 403 in the left-right direction. The front and rear swing shaft 404 provided to
The lower end portion of the needle swing rocking table 401 is mounted so as to rock in a free direction. A swing regulating arm (not shown) is connected to a lower end portion of the needle swing swing base 401. The lower end portion of the needle swinging table 401 is configured to be swingable in a substantially horizontal plane along an arc-shaped locus drawn by the swing regulating arm, and in particular, as shown in FIG. It is configured to reciprocate on the shuttle by the rotational driving force of the needle swing stepping motor 405 at 400.

Further, a threading shaft 305 is mounted on the needle swinging table 401 so as to be rotatable and vertically movable substantially parallel to the needle bar 5. The cylindrical portion 307 of the threading lever 306 is fitted to the upper end portion of the threading shaft 305, and the lower end portion of the threading shaft 305 is particularly fitted as shown in FIGS. The well-known threading hook holder 3
08 is attached. And the threading lever 30
As shown in FIG. 4, an upper end portion of the threading shaft 305 is rotatably inserted into the cylindrical portion 307 of FIG. One end of an operation pin 310 fixed so as to penetrate the upper end portion of the threading shaft 305 in a direction perpendicular to the axis, is loosely fitted into a cam groove 311 formed in a cylindrical portion 307 of the threading lever 306. Has been inserted.

The cam groove 311 of the cylindrical portion 307 is
As shown in FIG. 7, an inclined groove cam 311a extending so as to form a part of a spiral shape, and the inclined groove cam 311a
And a vertical groove cam 311b extending upward in the axial direction from the upper end of the cam. The inclined groove cam 311a is connected to the threading lever 306.
The shaft moves relatively to the threading shaft 305, thereby imparting a rotating action to the threading shaft 305. The vertical groove cam 311b has a configuration for holding the threading shaft 305 so as to be axially movable without rotating it. As shown in FIG. 4, a compression coil spring 312 is interposed between the operation pin 310 and the upper end of the cylindrical portion 307 in a compressed state. The through lever 306 is maintained in a state of being pulled up.

The other end of the operating pin 310 is disposed so as to contact and separate from the threading positioning stopper 302 of the needle bar 5 from above in the axial direction. Actuating pin 310
Is in contact with the threading positioning stopper 302 of the needle bar 5, the threading hook 313 (see FIGS. 5 and 6) provided on the threading hook holder 308 is located at a position corresponding to the eye hole of the sewing needle N. The height relationship is adjusted so that the threading shaft 305 stops. The operating pin 310 is connected to the needle bar 5.
When the threading lever 306 is further depressed downward after contacting the threading positioning stopper 302, one end of the operating pin 310 is guided in the rotational direction along the inclined cam 311a. Is configured to be rotated together with the threading hook holder 308.

Further, as shown in FIG.
A tension coil spring 316 is stretched on a guide plate 314 provided so as to hang down from the upper end of the threading lever 01 with a projection 315 provided at an intermediate portion of the threading lever 306. This tension coil spring 316
The threading lever 306 is pulled upward by the upward biasing force.

Further, a locking portion 317 is formed at an intermediate portion of the threading lever 306 and protrudes toward the back side of the sewing machine. The lowering operation of the threading lever 306 is performed when an operating body of the thread transfer means 500 described later comes into contact with the locking portion 317 from above. A threading stopper 318 that abuts the operating body of the thread transfer means 500 and stops the operating body at that position is provided at a substantially central portion in the height direction of the threading shaft 305 via a collar 319 (see FIG. 4). It is attached to a predetermined position. The threading stopper 318 can be attached to the needle bar 5.

On the other hand, as shown in FIGS. 5 and 6, a threading hook holder 308 is fixed to a lower end position of the threading shaft 305. As is well known, the threading hook holder 308 includes a pair of threading hook guide plates 320 and 32.
It has 0. These pair of threading hook guide plates 3
A threading hook 313 is fixed between 20,20. In each of the threading hook guide plates 320, 320, guide grooves 321 and 321 cut substantially horizontally are provided.
It is formed so as to be notched with the same height.
The upper thread A to be threaded is mounted so as to slide into these two guide grooves 321 and 321 and the threading hook 313 is inserted.
The upper thread A is hooked on the key portion 322 formed at the tip of the sewing needle N to draw the upper thread into the eye of the sewing needle N.

Here, the key portion 322 of the threading hook 313
Is formed so that the lower edge side of the plate-shaped hook body is cut out in a substantially triangular shape. Thereby, the upper thread A hooked on the key portion 322 of the threading hook 313 immediately drops downward from the key portion 322 of the threading hook 313 after the sewing needle N is inserted into the eye hole and is opened. Has become.

Further, as shown in FIG.
The needle stop thread hook mounting body 323 is rotatably mounted from the upper side of the threading hook holder 308, and the needle is attached to the rotating shaft 324 erected on the needle stop thread hook mounting body 323. A lock thread hook 325 is rotatably attached. Then, as shown in FIG. 5, a partial gear 327 provided on the needle retaining thread hook 325 meshes with a partial gear 326 provided on the threading hook holder 308. Further, as shown in FIG. 4, a stopper member 328 erected in a cut-and-raised shape on the needle stopper thread hook attachment body 323 comes into contact with a side surface of the threading lever 306 to restrict rotation, thereby enabling threading. The rotational force of the shaft 305 is transmitted to the needle stop thread hook 325, and the threading hook holder 308 and the needle stop thread hook 325 are rotated in opposite directions. Here, the swing end portion of the needle stopper thread hook 325 is formed in a forked shape for holding the threaded upper thread A. The bifurcated portions rotate in opposite directions simultaneously with the rotation of the threading hook holder 308 so as to approach and separate from each other.

On the other hand, as shown in FIGS. 1, 3 and 11, a thread transfer means 500 is arranged adjacent to the threading means 300. In this thread transfer means 500, a screw-shaped drive shaft 501 is provided substantially vertically on a base plate 502 so as to be adjacent to the threading shaft 305. A drive gear 503 is provided at the upper end of the drive shaft 501.
Is provided. Although not shown, an intermediate gear that is rotationally driven by a threading and threading stepping motor (see reference numeral “330” in FIG. 17) meshes with the drive gear 503.

A thread transfer operating body 504 is screwed to the drive shaft 501 and reciprocated in the vertical direction. As shown in FIG. 3, the thread transfer operation body 504 includes a hollow box-shaped external operation body 505 mounted in a free movement state with respect to the drive shaft 501, and an internal space mounted inside the external operation body 505. And an operating body 506. When the drive pin 508 erected on the operation plate 507 disposed on the front side of the internal operating body 506 engages with the screw groove of the drive shaft 501, the vertical movement of the internal operating body 506 is performed. ing.

A compression coil spring 509 is arranged inside the external operating body 505 so as to contact the bottom of the internal operating body 506. This compression coil spring 50
Numeral 9 extends in the axial direction so as to push up the inner working body 506 upward. By the urging force of the compression coil spring 509, both the inner and outer working bodies 506 and 505 are configured to move in the vertical direction integrally with each other.

On the lower edge portion of the operating plate 507 provided on the internal operating body 506, a thread push locking portion 511 is provided so as to be bent at a substantially right angle. The thread pushing locking portion 511 is used as the locking portion 317 of the threading lever 306.
, The threading lever 306 is pushed down. Further, from the upper surface of the external operating body 505, the thread transfer locking portion 5
12 are provided so as to project substantially horizontally toward the threading shaft 305 side. When the thread transfer locking portion 512 of the external moving body 505 comes into contact with the threading stopper 318 of the threading shaft 305 from above,
The downward movement of the external operating body 505 is stopped.

Further, a rack gear 513 is disposed near the side of the external moving body 505 so as to rise substantially at a right angle. A regulating shaft 515 erected on an internal operating body 506 is vertically movable into a long vertical groove 514 formed in the rack gear 513 so as to protrude substantially horizontally on the side of the external moving body 505. It is loosely fitted. By the guiding action based on such a configuration, the external moving body 505 is guided to move up and down without rotating.

Also, the side of the external moving body 505
As shown in FIG. 11, the thread transfer shaft 516 is fixed so as to protrude substantially horizontally so as to be adjacent to the upper regulation shaft 515. The yarn transfer operation gear 517 and the base side of the yarn transfer arm 518 are rotatably mounted on the yarn transfer shaft 516 via a collar. The thread transfer operation gear 517 and the base side of the thread transfer arm 518 are urged to rotate in opposite directions by a torsion coil spring 521 mounted on the thread transfer shaft 516. A projection 522 formed integrally with the thread transfer operation gear 517 so as to extend in the radial direction, and a locking pin 523 fixed to the base side of the thread transfer arm 518 include a torsion coil spring 512.
Abuts in the circumferential direction due to the rotational urging force. Thus, both members, namely, the thread transfer operation gear 517 and the thread transfer arm 518 are elastically engaged in the rotational direction via the torsion coil spring 521.

The yarn transfer operation gear 517 includes a rack gear 51.
3 and are arranged to mesh with the external operating body 505.
The yarn passing operation gear 517 moves up and down while rotating by moving up and down, and the yarn passing arm 518 rotates with the rotation of the yarn passing operation gear 517.

The thread transfer arm 518 is connected to the thread transfer operation gear 5.
A first thread transfer arm 518a extending in a direction substantially orthogonal to the thread transfer shaft 516 from the base side on the 17th side; and the upper shaft bent at a substantially right angle from the extension end side of the first thread transfer arm 518a. Yarn passing second arm 51 extending substantially parallel to 1
8b. As shown in FIG. 1, a bifurcated threaded board 5 is provided at the distal end of the thread transfer second arm 518b.
25 are provided. Between the thread tension plate 525 and the thread transfer gripping portion 526 provided at an intermediate portion of the thread transfer second arm portion 518b, the distal end portion of the upper thread A pulled out by the thread transfer means 200 is substantially linear. It is being passed over.

The thread transfer gripping portion 526 includes an upper holding plate 527 formed so as to protrude from the intermediate portion of the second yarn transferring second arm portion 518b toward the near side (the right side in FIG. 11), and an upper holding plate 527. Presser plate 528 pressed against the lower surface of
And A compression coil spring 531 for applying pressure is mounted on a holding shaft 529 extending upward from the lower holding plate 528 through the upper holding plate 527. The upper and lower pressing plates 527 and 528 are brought into close contact with each other by the axial biasing force of the compression coil spring 531 for applying pressure.

A pressure adjusting plate 532 is interposed between the pressure applying compression coil spring 531 and the upper holding plate 527. By reciprocating the pressure adjusting plate 532 in the axial direction of the holding shaft 529, the axial compressive force of the compression coil spring 531 for applying pressure is adjusted. This allows
The configuration is such that the adhesion between the upper and lower holding plates 527 and 528 is changed to adjust the gripping force of the upper thread.

More specifically, as shown in FIG. 1, the pressure adjusting plate 532 extends from the portion between the pressure applying compression coil spring 531 and the upper holding plate 527 to the second threading arm 518.
b extends along the inner surface side. A base end portion on the extension side is rotatably attached to a side surface of the thread transfer first arm portion 518a. On the other hand, as shown in FIG. 1, on the base side portion of the thread transfer first arm portion 518a,
A substantially U-shaped thread gripping bracket 533 is provided so as to be close to the thread passing operation gear 517, and the thread passing first arm portion 51 is provided.
It is rotatably mounted around a thread passing adjustment shaft 534 that extends substantially parallel to the thread passing shaft 516 that is the rotation axis of 8a.

The thread gripping bracket 533 and the pressure adjusting plate 53
2 is two link arms 53 constituting a link mechanism.
5, 536 so as to be linked with each other. Then, the pressure-applying compression coil spring 531 is compressed in the axial direction by the rotational urging force of the torsion coil spring 537 attached to the yarn passing adjustment shaft 534 that is the rotation axis of the yarn gripping bracket 533, and the urging force is strengthened. Thus, the upper and lower holding plates 527 and 528 are strongly pressed against each other.

As shown in FIG. 11, when the yarn transfer first arm portion 518a extends upward due to the yarn transfer operation gear 517 being at the uppermost position, the yarn transfer first arm When the thread transfer locking plate 538 provided in the portion 518a contacts the upper surface of the thread gripping bracket 533, the rotation of the thread gripping bracket 533 is stopped in the state of FIG. Thus, the compression amount of the compression coil spring 531 for applying pressure is suppressed, and the pressing force of the upper and lower holding plates 527 and 528 is reduced.

Further, as the yarn transfer operation gear 517 rotates, it is slightly lowered from the uppermost position shown in FIG.
When the thread transfer first arm 518a rotates by a predetermined amount and tilts as shown by a two-dot chain line in the middle, the thread transfer locking plate 538 provided on the thread transfer first arm 518a is attached to the thread gripping bracket. By separating from the upper surface of 533, the thread gripping bracket 533 is rotated by the rotational urging force of the torsion coil spring 537. Thus, by compressing the pressure applying compression coil spring 531 in the axial direction, the upper and lower pressing plates 527 and 528 are strongly pressed against each other.

Further, the thread transfer first arm portion 518a is integrally provided with a thread transfer swing lever 539 which protrudes from the thread transfer shaft 516 on the opposite side. A support roller 541 is rotatably attached to a distal end portion of the thread transfer swing lever 539, and is configured to swing integrally with the rotation of the thread transfer operation gear 517.

On the other hand, a thread transfer guide plate 542 for guiding the support roller 541 provided on the thread transfer swing lever 539 is fixed so as to be adjacent to the side of the rack gear 513. This yarn transfer guide plate 542 is composed of two stages of linear guide portions 542a and 542b. That is, the support roller 541 of the thread transfer swing lever 539 abuts on the upper side linear guide portion 542a provided so as to protrude toward the near side of the sewing machine (the right side in FIG. 11), whereby the thread transfer first arm is provided. The portion 518a is the yarn transfer operation gear 5
In spite of the rotation of 17, it is locked at the rotation position that protrudes obliquely downward. Further, a lower side linear guide portion 54 provided to be slightly retracted on the back side of the sewing machine (left side in FIG. 11).
2b, the support roller 541 of the thread transfer swing lever 539
Is brought into contact with the thread transfer first arm 518a.
It will be pivoted slightly downward. Thereby, regardless of the rotation of the thread transfer operation gear 517, the thread transfer first arm portion 518a is locked at the vertically downwardly rotated position as shown by the two-dot chain line in FIG. It has become.

Here, an operation hook 543 is provided integrally with the thread gripping bracket 533 so as to extend outward in the radial direction. As described above, when the thread transfer first arm portion 518a rotates to the lowermost position (FIG. 1).
1 (see the two-dot chain line), the positional relationship is set such that the operating hook 543 can ride on the radially leading end of the protrusion 522 provided on the thread transfer operating gear 517. The operation hook 543 is connected to the yarn transfer operation gear 51.
7, the thread gripping bracket 533 is rotated by the amount of the ride. Thereby, the compression coil spring 531 for applying pressure is provided.
Is suppressed, and the pressing force of the upper and lower holding plates 527 and 528 is weakened.

As shown in FIG. 1, the feed screw 2 of the yarn conveying means 200 is located near the yarn transfer gripping portion 526.
A thread cutting cutter 550 is attached to a support frame provided so as to stand up from the support portion 01.
The thread cutting cutter 550 is configured to cut the leading end of the upper thread held by the thread transfer grip 526. Further, on the support frame of the thread cutting cutter 550, an operation cam 551 for opening the swing-side thread holding plate 211 in the thread gripping portion 203 of the thread conveying means 200 is provided so as to project substantially horizontally.

Further, as shown in FIGS. 1, 7 and 8, a threading means 30
0, the upper thread passed through the sewing needle N is attached to the thread hook 8 of the balance 8.
A thread hooking means 600 to be attached to the position a is arranged. The yarn hooking means 600 also serves as a yarn feeding stepping motor 601 as a drive source. Further, a yarn feeding roller 602 is fixed to an output shaft of the yarn feeding stepping motor 601. An intermediate gear 605 rotatably fixed on a motor mounting plate 604 is always meshed with a drive gear 603 formed integrally with the yarn feeding roller 602.

On the other hand, to the motor mounting plate 604, a press-up mechanism (not shown) or a thread feeding rocking plate 606 that moves in conjunction with an automatic thread cutting device is rotatably mounted at a predetermined position. This thread feeding swing plate 60
A thread feeding tension coil spring 607 is hung on one end of the motor 6 and the motor mounting plate 604, and the other end of the thread feeding rocking plate 606 is urged in a direction away from the intermediate gear 605. . Further, one end of an auxiliary roller mounting plate 608 is rotatably connected to the other end of the yarn feeding rocking plate 606.
08 is slidably mounted on a support pin 609 erected on the motor mounting plate 604.

A pair of auxiliary rollers 611 and 611 are rotatably mounted on the auxiliary roller mounting plate 608 such that the auxiliary rollers 611 and 611 come into contact with the yarn feeding roller 602 by the urging force of the yarn feeding tension coil spring 607. A driven gear 612 is integrally formed with each of these auxiliary rollers 611, and when the auxiliary rollers 611 and 611 come into contact with the yarn feeding roller 602, each of the auxiliary rollers 611 is formed.
The driven gear 612 meshes with the drive gear 603 of the yarn feeding roller 602. The yarn feeding roller 602 is provided so as to be exposed from a long hole formed in the auxiliary roller mounting plate 608.

Further, a second intermediate gear 605a provided integrally with the intermediate gear 605 is exposed from the elongated hole of the auxiliary roller mounting plate 608. A thread take-up operation gear 613 is rotatably provided on the auxiliary roller mounting plate 608 so as to be adjacent to the second intermediate gear 605a. The thread take-up operation gear 613 is arranged so as to come into contact with and separate from the intermediate gear 605 by sliding along with the auxiliary roller mounting plate 608. That is, as described above, when the auxiliary rollers 611 and 611 come into contact with the yarn feeding roller 602, the yarn take-up operation gear 613 is set to the intermediate gear 605.
When the auxiliary rollers 611 and 611 are separated from the yarn feeding roller 602, the yarn take-up operation gear 613 is in an engaged state with the intermediate gear 605.

A first hooking arm 614 having a crank shape is attached to the thread take-up operation gear 613 so as to swing by the rotation of the thread take-up operation gear 613. The first threading first arm 614 is provided on the swing arm side with the first threading first arm 614.
The second thread hook is slid in the arm direction of the arm 614.
An arm 615 is attached. A thread take-up hook 61 having a well-known structure is attached to the distal end portion of the thread hook second arm 615.
6 is attached.

As is well known, the thread take-up hook 616 is provided with a thread take-up spring 617 which is engaged with a middle portion of the upper thread passed through the sewing needle N by the threading means 300, and is engaged with the thread guide groove 61.
8 is provided in a thread take-up bracket 619 provided. The thread take-up bracket 619 is rotatably mounted on the leading end of the second thread take-up arm 615 by a thread take-up shaft 620. The upper guide shaft 621 and the lower guide shaft 622 provided in the thread take-up bracket 619
By sliding on the guide path 624 of the curved thread take-up guide member (face plate) 623 disposed adjacent to the upper thread, the upper thread held by the thread take-up spring 617 is moved.
The thread is hooked on the thread hook 8a of the balance 8. The upper guide shaft 621 and the lower guide shaft 622 are pressed onto the guide path 624 of the thread take-up guide member 623 by a thread take-up torsion coil spring 625 that applies a rotational urging force to the thread take-up bracket 619.

Further, a thread take-up engaging groove 626 extending obliquely downward extends to the lower end of the guide path 624 of the thread take-up guide member 623. The upper and lower guide shafts 621 and 622 are arranged in the thread take-up engagement groove 626 so as to be fittable. As shown in FIG. 10, when the guide shafts 621 and 622 are fitted in the thread take-up engagement groove 626, the thread take-up bracket 619 is locked at the lower end position. Have been. Further, a motor mounting plate 60 is provided at an intermediate portion of the threading second arm 615.
4, a tension coil spring 627 is mounted. The thread take-up bracket 619 is held at the lower end position described above by the tension of the tension coil spring 627.

Here, as shown in FIG. 10, the thread take-up torsion coil spring 625 is set in the thread take-up spring receiver 651 and screwed to the thread take-up bracket 619. This thread take-up spring receiver 651 has a thread breakage shielding cylinder 65.
2 is rotatably assembled, and a thread take-up torsion coil spring 625 is inserted into a groove formed in the thread breakage shielding cylinder 652.
Is inserted. Therefore, the thread take-up torsion coil spring 6
When 25 is bent, the thread breakage shielding cylinder 652 rotates. The thread breakage shield plate 653 is formed on the thread breakage shield cylinder 652.
When the 6 (thread take-up bracket 619) is at the sewing position, the photo sensor 654 attached to the thread cutting guide member (face plate) 623 is opened and closed. That is, the photo sensor 65
4 is a thread break sensor (thread break detecting means).

On the other hand, as shown in FIGS. 7 and 9, the needle swing arm 406 which reciprocates in the left-right direction by the needle swing stepping motor 405 is provided at the lower end of the needle swing rocking table 401 of the needle swing mechanism 400. The moving end portion is rotatably connected. Through this needle swing arm 406, the needle swing rocking table 401 substantially moves the upper part of the needle plate around the left and right rocking shaft 403 and the front and rear rocking shaft 404 provided at the upper end portion of the needle rocking rocking table 401. It is configured to swing in an arc shape. A swing link 407 is provided at the base end of the swing arm 406. The tip of the swinging link 407 is connected to the swinging stepping motor 40.
5, is pressed against the outer peripheral cam surface of the swinging cam 408 driven by the swinging tension coil spring 409. Thus, the above-described needle swing operation is performed according to the outer peripheral shape of the needle swing cam 408.

Here, the rotation shaft 411 of the swinging cam 408
, A thread take-up cam 630 is fixed. A thread take-up switching plate 631
Is in contact with the swing arm 631a from below. The thread take-up switching plate 631 is rotatably mounted on the switching shaft 632. The other swing arm 631b extending toward the upper side of the thread take-up switching plate 631 is provided with a thread take-up spring stopper 633 rotatably arranged in a horizontal plane.
Is loosely inserted into a locking hole 634 provided on one side of the swing arm.

The swing arm on the other side of the thread take-up spring stopper 633 is formed so that a thread take-up stopper plate 635 is bent downward. By the rotation urging force of the stop torsion coil spring 637 attached to the rotation shaft 636 of the thread take-up spring stopper 633,
The thread take-up stopper plate 635 is arranged so as to engage with the middle part of the second threading arm 615. Thereby, the swing of the second thread hook arm 615 is restricted.

Then, the thread take-up cam 630 is
When the projection-like cam portion provided on the thread take-up cam 630 comes into contact with the thread take-up switching plate 631, the thread take-up switching plate 631 and the thread take-up stopper plate 6 are rotated.
The thread take-up stopper plate 635 is separated from the thread hooking second arm 615 to be in an open state. This allows the threading second arm 615 to rotate.

Further, as shown in FIG.
An upper base tension plate 640 for guiding the upper thread guided to the balance 8 is disposed on the upper side of the motor mounting plate 604 of No. 0. The lower base tension plate 642 is brought into close contact with the lower surface side of the upper base tension plate 640 by the urging force of the compression coil spring 641 attached to a shaft extending downward from the upper base tension plate 640.

Further, both base tension plates 640, 6
An optical upper thread presence / absence detection sensor 643 for detecting the presence / absence of an upper thread is disposed near 42. The upper thread presence / absence detection sensor 643 has, for example, a structure as shown in FIG. That is, in FIG. 14, the detection light emitted from the light emitting element (LED) 644 at one end is received by the light receiving element (solar cell) 645 provided at the opposite end. As shown in FIG. 14, when the inspection light is blocked due to the presence of the upper thread A between the light emitting element 644 and the light receiving element 645, and when the upper thread is not present, the light from the light receiving element (solar cell) 645 The presence or absence of the upper thread A is detected based on the change in the output voltage as shown in FIG.

Next, a description will be given of a threading operation and a thread hooking operation of a new upper thread performed by the apparatus configured as described above. When setting the upper thread on the thread standby supply means 100 from the state where the thread is not threaded on the sewing machine and threading the thread, the sewing machine operator first pulls the upper thread pulled out from a thread sesame (not shown) serving as a thread supply source. Is picked up, and a thread is hooked on a thread guide provided on the back side of the thread reservoir of the thread standby supply means 100. Thereafter, as shown in FIG. 13, the yarn is threaded on the yarn guide 115 and the base tension plate 106 through the space between the yarn pullback rollers 109a and 109b of the yarn picking mechanism.
Further, the upper thread is passed between the thread holding plates 102 and 103,
Excess thread is cut by the thread cutter 107.

At this time, since the distance from the thread holding plates 102 and 103 to the thread cutting cutter 107 is set to a predetermined amount, the amount of the upper thread hanging down from the thread holding plates 102 and 103 after the thread cutting is changed to the next thread. The length is convenient for the yarn gripping operation by the transport means 200.

The next thread conveying operation by the thread conveying means 200 is started when the sewing machine operator turns on the thread hooking switch. As a result, first, the yarn selection carriage 202, which was initially waiting at the origin position, moves laterally to the yarn catching position shown in FIG.
The opening of the third guide groove 215 faces the thread holding plates 102 and 103 of the thread standby supply means 100.

In this state, when the moving plate 205 starts to move toward the back of the sewing machine, the swing-side thread holding plate 211 of the thread gripper 203 is opened along the opening / closing operation cam 221, and the thread is further released. By moving the grip portion 203 to the back side, the upper thread A is guided into the guide groove 215 and enters between the thread holding plates 210 and 211. Then, the thread gripper 203 moves until the opening / closing operation cam 221 is completed, so that the swing-side thread holding plate 211 is closed, and as a result, the upper thread A is held between the thread holding plates 210 and 211. Is done.

Next, as the feed screw 201 rotates, the thread selection carriage 202 moves laterally by a predetermined amount, and at the same time, the thread gripper 203 returns to the front side of the sewing machine. At this time, the upper thread A in the guide groove 215 slides sideways and moves into the thread locking groove 216, and the upper thread A is also moved by the forward and backward movement of the thread gripper 203.
3 does not come off.

The yarn selection carriage 202 further moves laterally so as to avoid the base tension plates 640 and 642 and the upper yarn presence / absence sensor 643, and reaches the yarn transfer means 500. When the yarn selection carriage 202 reaches the yarn transferring means 500 in this way, the yarn gripping portion 203 arranged at the same height relationship as the yarn transferring grip portion 526 of the yarn transferring means 500 has passed the yarn transferring grip portion 526. Move to the back side of the sewing machine at the time. Thus, after the upper thread on the side of the thread grasping section 203 is held by the thread passing grasping section 526 of the thread passing means 500, the upper thread on the side of the thread grasping section 203 is moved by the thread cutting cutter 5.
Cut by 50.

The length of the upper thread that hangs from the thread transfer holding portion 526 after cutting is set to a length that allows the threading means 300 to perform a threading operation on the sewing needle N well. That is, if the length is too long, the upper thread cannot completely pass through the eye of the sewing needle N. If the length is too short, the upper thread is not sewn when the sewing operation is started after the threading. This is because the needle N comes out of the eye hole.

When the thread holding section 203 of the thread conveying means 200 is further retracted to the front side of the sewing machine, the swinging side thread holding plate 211 of the thread holding section 203 is opened along the operation cam 551. As a result, the upper thread piece that has been gripped so far falls downward. By disposing a predetermined tray at this drop position, scattering of lint can be prevented.

When the thread gripping portion 203 of the thread conveying means 200 returns to the standby position, which is the home position, through a path that does not collide with each member, the press-up mechanism (not shown) or an automatic thread cutting device is operated to operate the thread. The yarn feeding swing plate 606 of the hooking means 600 is moved to separate the auxiliary rollers 611 and 611 from the yarn feeding roller 602, and the yarn take-up operation gear 613 meshes with the second intermediate gear 605 a of the intermediate gear 605. At the same time, the needle take-off stepper motor 405 removes the thread take-off stopper plate 635 to allow the second threading arm 615 to rotate.

Then, the yarn feeding hook 616 is moved to the upper end position along the guide path 624 by rotating the yarn feeding stepping motor 601 forward by several steps. The movement of the thread take-up hook 616 is performed while the second thread take-up arm 615 slides and expands / contracts with respect to the first thread take-up arm 614. The size of the sewing machine can be reduced and the appearance can be improved.

Then, a stepping motor (not shown, 330 in FIG. 17) for thread transfer and threading (not shown) is driven to rotate forward for a predetermined number of steps, whereby the drive shaft 501 is rotated to rotate the internal operating body. 506
At the same time, the external operating body 505 descends. As a result, the thread transfer arm 518 descends while rotating together with the rack gear 513, and the thread transfer gripper 526 of the thread transfer arm 518 descends while holding the upper thread so as to fall down toward the sewing machine.

When the thread transfer arm 518 falls down at a predetermined angle, the thread transfer locking plate 538 is disengaged from the upper surface of the thread holding bracket 533, so that the upper and lower pressing plates 527, 528 constituting the thread transfer holding section 526 are moved. In a state where the upper thread is strongly pressed against each other and the upper thread is strongly held, the subsequent lowering operation is performed without causing the thread to fall off.

Further, when the drive shaft 501 is rotated and the external operating body 505 descends together with the internal operating body 506, the support roller 541 provided on the thread passing swing lever 539 is moved to the upper portion of the thread passing guide plate 542. Side linear guide 54
2a, the thread transfer arm 518 descends with the rotation stopped at a position where the thread transfer arm 518 does not contact other members. By doing so, it is possible to lower the thread transfer arm 518 in a state where the overhang amount is minimized, and it is possible to reduce the size of the appearance of the sewing machine.

Then, the thread pushing lever 306 of the internal operating body 506 comes into contact with the engaging portion 317 of the threading lever 306 from above, so that the threading lever 306 is pushed downward by a predetermined amount. , The operating pin 310 is the needle bar 5
Abuts the threading positioning stopper 302 from above in the axial direction. Accordingly, the threading shaft 305 stops at a height position where the threading hook 313 provided on the threading hook holder 308 matches the eye of the sewing needle N. Immediately after the threading shaft 305 stops in this way, the external operating body 505 comes into contact with the threading stopper 318 of the threading shaft 305 from above, and the downward movement of the external operating body 505 also stops.

Before the downward movement of the external operating body 505 stops, the support roller 541 provided on the thread transfer swing lever 539 contacts the lower linear guide portion 542b.
As a result, the thread transfer grip 526 rotates to a region inside the sewing needle N (see a two-dot chain line in FIG. 11), and the upper thread tensioned between the thread transfer grip 526 and the thread tension plate 525. A
Is arranged in front of the eye of the sewing needle N. At this time, the operation hook 543 of the thread gripping bracket 533 rides on the radially leading end of the protrusion 522 provided on the thread transfer operation gear 517. Thereby, the yarn gripping force in the yarn transfer gripping portion 526 is weakened.

Then, when the threading lever 306 is further lowered together with the internal operating body 506, the operating pin 310 is rotationally guided along the inclined groove cam 311a. As a result, the threading shaft 305 rotates together with the threading hook holder 308, and the threading hook 313 penetrates the eye of the sewing needle N, hooks the upper thread, and performs a return operation. Will be At this time, the needle stopper thread hook 325 holds the thread guide 1 of the needle stopper 9 in a state where the upper thread is hooked on the distal end portion.
Since the upper thread is passed through 0, the supply path of the upper thread is formed well. In addition, before the threading operation is performed, the operation pin 310 moves along the vertical groove cam 311b, so that the threading shaft 305 is lowered by a predetermined amount without rotating. This takes into account variations in the stop position of the upper shaft 1.

Also, as in the present embodiment, the threading means 3
By separately arranging the operating portion of the threading device 500 and the operating portion of the thread transferring means 500, the threading operation can be performed after the thread transferring operation is enabled by the thread transferring device 500. The threading operation can be performed more stably than when the operations are performed simultaneously. In particular, in the present embodiment, as described above, before the threading operation is performed in consideration of the variation in the stop position of the upper shaft 1, the threading shaft 30
5 is slightly lowered, it is preferable to separate the operating part of the threading means 300 from the operating part of the thread passing means 500. Otherwise, a device for detecting the position of the threading shaft 305 with a sensor is required.

When the thread take-out stepping motor 601 is rotated in the reverse direction, the thread take-up hook 616 moves downward and catches the middle part of the upper thread, and the upper thread upstream of the thread take-up side from the thread take-up hook 616 is moved to a predetermined position. Is set on the thread feed-out roller 602 and the upper thread downstream of the thread take-up hook 616 on the side of the sewing needle N is placed so as to rest on an intermediate portion of the balance 8.

Next, the needle swing stepping motor 405
The needle swing cam 408 is returned to the original position by
The thread take-up stopper plate 635 is returned to the locking position, and the rotation of the thread hooking second arm 615 is locked. At this time,
An upper thread is sandwiched between the thread feeding roller 602 and the auxiliary rollers 611 and 611. The thread take-up hook 616 that has reached the lower end position is held at that position by the thread take-up engaging groove 626, as shown in FIG.

Next, when the internal operating body 506 is raised by reversing the drive shaft 501, the threading shaft 305 is reversed and the sewing needle N Threading is performed. Immediately after this threading operation is performed, the upper thread is released, so that the threading hook 3
13 can be avoided. Further, when the inner operating body 506 comes into contact with the outer operating body 505 and rises integrally, the thread transfer gripping portion 526 from which the upper thread has come off rotates while rising, and stops in a standby state. Thereby, a series of threading operation and threading operation are completed.

The operation for replacing the already threaded upper thread with another upper thread will be described. First, when the sewing machine operator turns on the thread removing switch, the thread transporting operation by the thread transporting means 200 is started, and the thread selecting carriage 202, which was initially waiting at the origin position, moves to the thread catching position shown in FIG. Moving. Thereby, the thread gripper 20
The opening of the third guide groove 215 faces the thread holding plates 102 and 103 of the thread standby supply means 100.

In this state, the moving plate 205 starts moving toward the back of the sewing machine, and the swing-side thread holding plate 211 of the thread gripper 203 is opened along the opening / closing operation cam 221 so that the thread gripper 203 is opened. Is further moved to the back side, so that the thread picking operation arm 217
Then, the driven yarn pull-back roller 109b is brought into contact with the driving-side yarn pull-back roller 109a. In this state, the upper thread already hooked is pulled back to the thread supply unit 101 by rotating and driving the thread pull-back roller 109a on the driving side.

Then, the leading end of the upper thread passes through the base tension plates 640 and 642 and passes through the upper thread detecting sensor 64.
When a signal having passed through 3 is obtained, the thread pulling stepping motor is driven at a predetermined number of rotations and stopped therefrom. The number of rotations of the motor until this stop is determined by the upper thread detection sensor 643.
Are set corresponding to the distances from the thread supply units 101 to the respective yarn supply units 101. When the motor is stopped, the upper yarns hang down from the respective yarn supply units 101 for a predetermined length.

When the upper thread already threaded is removed in this manner, the thread selection carriage 202 returns to the origin standby position once, and the other upper thread set in the thread standby supply means 100 is removed. By performing the same threading operation and threading operation as described above, the thread exchange is completed.

FIG. 16 shows an example of the appearance of the embroidery sewing machine with the above-mentioned automatic needle thread changing device. That is, in FIG.
An operation panel 60 is provided on a pillar portion of the sewing machine, and an upper portion of the operation panel 60 is an operation panel (display means) 70 for sewing the embroidery of the sewing machine. Above the operation panel 70 for embroidery sewing of the sewing machine, a thread hook switch 61 for starting and stopping the upper thread changing device is provided. Also, at the tip of the arm of the sewing machine,
A start / stop switch 62 for starting and stopping the sewing machine is provided. The embroidery sewing machine can be loaded with a memory card 63 storing an embroidery pattern, and displays the entire pattern stored in the memory card 63 on the operation panel 60. This operation panel 6
When the display portion of “0” is pressed, the pattern of the pressed portion is selected and displayed on the operation panel 70 for embroidery sewing on the upper side. Therefore, the operation panel 60 includes a pattern selection unit.

FIG. 17 shows an operation panel 70 for embroidery sewing.
In the illustrated example, the operation panel 70 is displayed.
On the upper left side of the embroidery pattern, an overall pattern display section 71 for displaying the selected embroidery pattern is provided. Above the overall pattern display section 71, a thread number display section 72 for displaying the total number of color threads to be used is provided. An exploded pattern display section 73 for displaying a pattern decomposed for each color is provided from an intermediate portion to an upper portion of the operation panel 70. In the illustrated example, the disassembled pattern display section 73 includes five display sections 731, 732, and 73 arranged side by side.
3,734,735. Recommended color display sections 741, 742, 74 for displaying recommended colors on the upper part of these five display sections 731, 732, 733, 732, 735.
3,744,745 are provided.

Further, a thread hook display section 75 for displaying a set position of a thread to be automatically threaded is provided below the operation panel 70.
Is provided. That is, the threading display section 75 is composed of five display sections 73 arranged side by side above the disassembled pattern display section 73.
The display units 751, 752, 753, 754, and 755 correspond to 1,732, 733, 734, and 735, respectively. Therefore, according to the illustrated example, the thread set at the position "3" of the thread standby supply means 100 at the beginning is automatically threaded and used for sewing.

Further, near the threading display section 75, in the example shown in the figure, the order setting switches 76, 77 and the thread setting switches 78, 79 constituting threading setting means below and on the side of the right end display section 755. Is provided. That is, the order setting switches 76 and 77 and the thread setting switches 78 and 7
9 is used to input the set position of the thread to be automatically threaded. Also, the order setting switch 76 below the display unit 755,
The input position can be changed by pressing the 77, and the display units 751, 752, 753, 754, 75 can be changed by pressing the thread setting switches 78, 79 on the side of the display unit 755.
The number displayed in 5 changes. Specifically, pressing the upper thread setting switch 78 increases the number, and pressing the lower thread setting switch 79 decreases the number.

As described above, the operation panel 70 for embroidery stitching has the disassembled pattern display section 73 separated for each color and the threading display section 75 for displaying the set position of the thread to be automatically threaded in the same line. Because they are arranged, the input is easy to understand. By the way, when the thread setting switch 61 is turned on without inputting the set position of the thread to be automatically threaded, the thread is threaded sequentially from the position "1" of the thread standby supply means 100. I have. In that case, each display part 751, 752, 753, 754 of the threading display part 75
755 is displayed in the order of 1, 2, 3, 4, and 5. In addition, the setting value displayed on each of the display units 751, 752, 753, 754, and 755 of the threading display unit 75 can be changed even during sewing.

FIG. 18 is a control block diagram of the sewing machine. A central control device 80 as a control means includes a microcomputer, a ROM,
AM, EEPROM (Electrical Erasable PRO)
M), a key matrix 64, a thread presence / absence detection sensor 643, a thread break sensor 65
4. The spindle sensor 12 is connected. Further, the sewing machine motor 11 is connected to the central control device 80 via a drive circuit 81, the display means 70 is connected via a display control circuit 82, and the stepping motors 230, 207,
130, 330, 601, 405, and 170 are connected via respective drive circuits 83, 84, 85, 86, 87, 88, and 89. The key matrix 64 includes a thread hooking switch 61, a start / stop switch 62, order setting switches 76 and 77, thread setting switches 78 and 79, and the like.

In the above embroidery sewing machine with an automatic needle thread changing device, when the embroidery sewing is interrupted, the embroidery stitching information such as the embroidery stitching information such as the embroidery stitching not completed information and the thread hooking interrupting information. By registering in an EEPROM that can be electrically erased and electrically rewritten, the data is retained even after the power is turned off.

Next, a method of controlling the automatic thread exchange embroidery sewing will be described. FIG. 19 is a general flowchart showing a schematic control example of the automatic thread exchange embroidery sewing. This process is started by turning on the power to the sewing machine main body and issuing an embroidery sewing instruction. As shown in FIG. 19, first, in step S10
At 1, it is determined whether or not embroidery stitching interruption information is registered in the EEPROM. If the embroidery stitching interruption information has not been registered, the process proceeds to the next step S102, but if it has been registered, the power has been cut off before the embroidery stitching has been completed previously, so the process proceeds to step S111. In this step S111, whether or not to continue the suspended embroidery stitching is displayed on the operation panel 60, and the operator is made to select it.
The process proceeds to step S12, and if there is an input indicating not to continue, the process proceeds to step S102.

In step S112, the embroidery sewing interruption information registered in the EEPROM is written in the RAM.
Continue the suspended embroidery stitching. The sewing process and the threading process in that case will be described later in step S105.
It is the same as going. The embroidery stitching interruption information includes the size of the pattern, the initial needle position, the number of stitches for which sewing has been completed, threading information, and the like.

In step S102, the embroidery data of the embroidery pattern selected on the operation panel 60 by the operator is read from the ROM and stored in the RAM, and then the process proceeds to the next step S103. In this step S103, the operator sets the thread hook setting means (sequence setting switches 76, 77 and thread setting switches 78, 7) of the operation panel 70.
The needle thread exchange information (thread hooking information) input in 9) is stored in the RAM.
After that, the process proceeds to the next step S104. As described above, the thread hooking information can be changed and input even during the sewing, and if the change is input, it is rewritten and stored in the RAM. In step S104, it is determined whether or not the thread hooking switch 61 is ON. If it is not ON, the process returns to the step S101. If it is ON, the process proceeds to the next step S105, where the automatic thread hooking Sewing starts.

That is, in step S105, first,
The thread setting means (sequence setting switches 76 and 77 and thread setting switch 7
8, 79), the upper thread to be sewn first is automatically threaded according to the threading information input. At this time, there is a case where it is desired to stop the thread hooking due to an input error or an incorrect color of the thread to be set. In this case, the first thread is automatically threaded (step S1).
This will be described with reference to the flowchart of FIG.

As shown in FIG. 20, first, in step S2
01, according to the input threading information,
After moving 00 to the yarn catching position where the first color yarn is set, the process proceeds to the next step S202. In this step S202, it is determined whether or not the thread hook switch 61 is ON. If it is not ON, the process proceeds to the next step S203, and if it is ON, the process proceeds to step S212. That is, if the worker notices an error at this point, the threading operation can be interrupted by pressing the threading switch 61 again. Therefore, the thread hook switch 61 also functions as a thread hook interrupting operation unit. In step S212,
The yarn conveying means 200 returns to the origin position without catching the yarn.
Thereafter, the operator resets the color thread and presses the thread hook switch 61 again, whereby the automatic thread hooking is restarted. After that, the process returns to the process in step S104 of the general flow in FIG.

If the threading operation proceeds without interruption,
In step S203, the yarn transporting means 200 catches the first color yarn and moves to a position where the yarn is transferred to the yarn transferring means 500. Thereafter, the process proceeds to the next step S204. In this step S204, it is again determined whether or not the thread hook switch 61 is ON. If it is not ON, the process proceeds to the next step S205, and if it is ON, the process proceeds to step S214. That is,
At this point, if an interruption is instructed, in step S214,
The yarn conveying means 200 returns to the home position after the yarn has been laid over the yarn transferring means 500, and the yarn hooking operation is interrupted with the yarn transferring means 500 not operating. After that, the process returns to the process in step S104 of the general flow in FIG. Here, the reason why the yarn conveying means 200 interrupts the processing after the yarn is transferred to the yarn transferring means 500 is as follows.
When you return to the origin while capturing the thread that was captured and pulled out,
This is to prevent the drawn-out thread from being caught by other members, and to prevent such a situation.

If the yarn hooking operation proceeds without interruption, the yarn transporting means 200 hangs the yarn to the yarn transferring means 500 and returns to the origin position in step S205. Thereafter, the process proceeds to the next step S206. That is, in this step S206, the thread transferring means 500 rotates downward to stretch the thread in front of the needle hole, threading is performed by the threading means 300, and threading to the thread take-up spring is performed by the threading means 600. . Thereafter, the process proceeds to the next step S207.

In this step S207, it is again determined whether or not the thread hooking switch 61 is ON.
The process proceeds to the next step, that is, step S106 following the general flow in FIG. 19, and if ON, the process returns to the process in step S104 in the general flow in FIG. Specifically, when an interruption is instructed while the threading operation in steps S205 and S206 is being performed, the sewing machine is stopped in a state where the threading operation is completed. That is, after the threading operation is completed, the embroidery sewing is automatically started. However, when the interruption of the threading operation is instructed, the sewing is not performed. As described above, the biggest reason for interrupting the thread hooking operation is to not perform embroidery stitching with the wrong color thread. In addition, the interruption is performed so that the time loss is reduced.

Next, the flow returns to the general flow of FIG. That is, when the thread hooking is completed, the embroidery sewing starts automatically in step S106. The embroidery sewing process for the first color thread (step S106) will be described with reference to the flowchart of FIG. 21 showing the subroutine process.

As shown in FIG. 21, first, in step S3
In step 01, it is determined whether or not the start / stop switch 62 is ON.
If it is ON, the process proceeds to step S311. In step S302, the rotation of the sewing machine motor 11 is controlled. In the next step 303, it is determined whether or not the needle is in the upper phase. Proceed to the next step S304, and if the hand is not in the upper phase, the next step S3 of step S304
Go to 05. In step S304, embroidery stitches are formed by moving the embroidery frame. At this time,
By pressing (turning on) the start / stop switch 62, the embroidery sewing can be stopped.

That is, in step S311, after the start / stop switch 62 is pressed (turned on), the sewing machine motor 11 is stopped. Then, the next step S3
Proceed to 12. In this step S312, the EEPROM
It is determined whether or not the embroidery interruption information has already been registered.
If not registered, the process proceeds to step S314. In step S313, the embroidery sewing interruption information registered in the EEPROM is deleted. After that, it advances to step S314.

Then, in step S314, the EEPR
The current interruption information of various embroidery stitches is registered in the OM. Thereafter, the process proceeds to the next step S315. This step S31
In step 5, it is determined again whether the start / stop switch 62 is ON. If not, the process of step S315 is performed.
It returns to the process of 1. That is, the start / stop switch 6
When 2 is pressed again, the continuation of the embroidery stitch is sewn. Even if the power is turned off at this point, re-embroidering can be performed as described in steps S101, S111, and S112 of the general flow in FIG.

In step S305, it is determined whether or not the embroidery of the first color thread is completed. If it is completed, the process proceeds to the next step S306. If not, the process returns to step S301. Then, step S306
After stopping the sewing machine motor 11, the next step S3
At 07, the automatic thread trimming is performed, and then the process proceeds to the next step, that is, step S107 of the general flow in FIG.

Next, the flow returns to the general flow of FIG. That is, when the thread trimming of the first color thread is completed, the first color thread is threaded, and then in step S107, the automatic threading of the second color thread is performed. This process is the same as the first-color thread automatic threading described with reference to FIG. Although omitted hereafter, after the automatic threading of the second color thread is completed, the embroidery sewing of the second color thread is started, and further, the automatic threading of the third color thread and the embroidery sewing are performed. The process proceeds in the same manner as described with reference to FIGS.

Thereafter, when the embroidery sewing of the last color thread is completed in step S108, the sewing machine motor 11 is stopped after the automatic thread trimming. Subsequently, in step S109, it is determined again whether or not the embroidery interruption information has been registered in the EEPROM.
It returns to the process of 01. In step S119, EEPRO
The embroidery stitching interruption information registered in M is deleted because the embroidery stitching has been completed to the end. Thereafter, the process returns to the step S101.

As described above, according to the embroidery sewing machine with the automatic upper thread changing device of the embodiment, the following effects can be exhibited. (1) Since the disassembled pattern display section 73 decomposed for each color thread corresponds to the thread hook display section 75 for displaying the automatic thread hook order setting, the automatic thread hook order setting is easy to understand. (2) If the upper thread A is set in the thread supply source in the order in which it is used, the work of inputting the order setting of the automatic threading can be omitted. (3) Even after the automatic thread exchange embroidery sewing is started, the change order of the automatic thread hooking order can be changed, so that the embroidery sewing with the wrong color thread is not performed. (4) Since the automatic threading operation can be interrupted, the embroidery sewing with the wrong color thread is not performed. (5) Since the interrupting operation of the automatic thread hooking is appropriately changed according to the time when the interrupting instruction is input, it is possible to eliminate thread tangling and reduce time loss. (6) Since the interruption information of the automatic thread exchange embroidery sewing is stored even after the power is turned off, even if the embroidery sewing is interrupted for some reason, the suspended automatic thread exchange embroidery sewing can be performed again.

By the way, in this embodiment, the EEPROM is used as the storage means of the interruption information.
Instead of M, RAM is battery-backed SR
Various information may be stored using an AM (Static RAM) even when the power is turned off. In addition, the present invention is not limited to only the above-described embodiments, and it is needless to say that the shapes and the like of various parts are arbitrary, and that other specific detailed structures can be appropriately changed. It is.

[0122]

As described above, according to the embroidery sewing machine with the needle thread changing device according to the first aspect of the present invention, the thread hook display section is provided corresponding to each color thread disassembled and displayed on the pattern display section. Since the threading order is displayed, the automatic threading order setting of each color thread constituting the embroidery pattern can be easily understood. Therefore, it is possible to prevent the embroidery sewing from being performed with the wrong color thread after the automatic threading.

According to the embroidery sewing machine with the needle thread changing device according to the second aspect of the present invention, in addition to the effect obtained by the first aspect, the upper thread is connected to the thread supply source in the order of use. If the setting is performed from the side of the section, the advantage that the trouble of inputting the order setting of the automatic threading to the threading setting means can be saved can be obtained.

According to the embroidery sewing machine with the upper thread changing device according to the third aspect of the present invention, in addition to the effects obtained by the first or second aspect, after the embroidery sewing is started after the automatic thread exchange. However, there is an advantage that the order setting of the automatic threading can be changed and input.

According to the embroidery sewing machine with the needle thread changing device according to the fourth aspect of the present invention, the automatic threading operation can be interrupted, so that embroidery sewing with the wrong color thread is prevented. can do.

According to the embroidery sewing machine with the needle thread changing device according to the fifth aspect of the present invention, the operation of the thread conveying means is changed before and after the needle thread is caught at the time of the thread suspending operation. In addition to the effects obtained by the invention described in claim 4,
The advantage is obtained that the yarn is not entangled and the time loss can be reduced.

According to the embroidery sewing machine with the needle thread changing device according to the sixth aspect of the present invention, the interrupt information of the automatic thread changing and the embroidery sewing is stored even after the power is turned off, so that the embroidery sewing is interrupted. Even if the power is turned off, if the power is turned on again, the automatic thread replacement and embroidery sewing can be continued after the interruption. Therefore, after the sewing is interrupted and the power is turned off, and the power is turned on again, the continuation of the embroidery sewing and the automatic thread exchange need not be reset, and the embroidery sewing is performed with the wrong color thread without any operation. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an automatic threading device and an automatic threading device of an embroidery sewing machine as an example of an embroidery sewing machine with a needle thread changing device to which the present invention is applied.

FIG. 2 is a perspective view showing an upper shaft and a connection structure around the upper shaft.

FIG. 3 is an enlarged perspective view showing a drive system of the thread passing means and the threading means of FIG.

FIG. 4 is an enlarged perspective view showing the structure of the threading means of FIG. 1;

FIG. 5 is an enlarged plan view showing a structure of a threading hook in the threading means of FIG. 4;

FIG. 6 is an enlarged perspective view showing the threading hook of FIG. 5;

FIG. 7 is an enlarged perspective view showing the structure of the automatic thread hooking means and the needle swing mechanism of FIG.

FIG. 8 is an enlarged front view showing the automatic thread hooking means of FIG. 7;

9 is an enlarged side view showing a connection relationship between the automatic thread hooking means and the needle swing mechanism in FIG. 7;

FIG. 10 is a plan view showing a structure around a thread take-up bracket of FIG. 8;

FIG. 11 is an enlarged front view showing the structure of the thread passing means and the threading means of FIG.

FIG. 12 is an enlarged perspective view showing the structure of the yarn conveying means of FIG.

FIG. 13 is an enlarged perspective view showing a relationship between a yarn standby supply unit and a yarn conveying unit in FIG. 1;

FIG. 14 is a longitudinal sectional view showing an example of a needle thread presence / absence detecting means.

FIG. 15 is a diagram illustrating an example of an output signal of the upper thread presence / absence detecting means in FIG. 14;

FIG. 16 is a front view showing the appearance of an embroidery sewing machine with a needle thread changing device as an example to which the present invention is applied.

17 is an enlarged front view showing a display example of an operation panel (display means) for embroidery sewing of the sewing machine of FIG. 16;

FIG. 18 is a control block diagram of the sewing machine in FIG. 16;

FIG. 19 is a general flowchart showing a schematic control example of automatic thread exchange embroidery sewing.

20 is a flowchart showing a subroutine of an automatic threading process for the first color thread (step S105) in the flow of FIG. 19;

FIG. 21 is a flowchart showing a subroutine process of the embroidery sewing process of the first color thread (step S106) in the flow of FIG. 19;

[Explanation of symbols]

A Needle thread N Sewing needle 1 Upper shaft 5 Needle bar 8 Balance 9 Needle stopper 10 Thread guide 11 Sewing machine motor 60 Operation panel 61 Threading switch 62 Start / Stop switch 63 Memory card 70 Display means 71 Overall pattern display section 72 Number of thread display section 73 division pattern display section 75 thread hook display section 76, 77, 78, 79 thread hook setting means 80 control means 100 thread standby supply means (thread supply source) 101 thread supply sections 102, 103 thread holding plate 106 base tension plate 107 thread Cutting cutter 109a, 109b Thread pull-back roller (thread picking roller) 113 Roller support bracket 115 Thread guide member 130 Thread picking stepping motor 170 Thread cutting stepping motor 200 Thread transport means 201 Feed screw 202 Thread selection carriage 203 Thread catching unit 205 Transfer Moving plate 207 Vertical feed stepping motor 210, 211 Thread holding plate 212 Oscillating shaft 214 Operating pin 215 Guide groove 216 Thread locking groove 221 Opening / closing operation cam 230 Lateral feed stepping motor 250 Operation cam (thread piece dropping operation section) 300 Threader Means 302 Threading positioning stopper 305 Threading shaft 306 Threading lever 308 Threading hook holder 310 Operating pin 311 Groove cam 313 Threading hook 317 Locking part 325 Needle stop thread hook 330 Thread transfer and threading stepping motor 400 Needle swing mechanism 405 Needle swinging stepping motor 500 Thread transfer means 501 Drive shaft 505 External operating body 506 Internal operating body 511 Thread push lock section 513 Rack gear 517 Thread transfer operating gear 518 Thread transfer arm 522 Projection 523 Lock pin 526 Thread transfer gripping section 527 Upper holding plate 528 Lower holding plate 533 Thread holding bracket 538 Thread transfer locking plate 539 Thread transfer swing lever 542 Support roller 543 Operating hook 550 Thread cutting cutter (thread cutting member) 600 Threading means 601 Threading stepping motor 602 Thread feed roller 605 Intermediate gear 605a Second intermediate gear 606 Thread feed swing plate 611 Auxiliary roller 613 Thread take-up operation gear 614 Thread take-up first arm 615 Thread take-up second arm 616 Thread take-up hook 624 Guide path 626 Thread take-up engaging groove 635 Thread take-up stopper Plates 640, 642 Base tension plate 643 Upper thread presence detecting means 654 Thread break detecting means

Claims (6)

[Claims] An upper thread selectively drawn out from a thread supply source having a plurality of upper threads to a predetermined thread path is conveyed so as to protrude near the eye of the sewing needle and is fed into the eye of the sewing needle. Upper thread changing device to be inserted, thread changing setting means for selectively setting the order of the upper thread to be automatically changed from the thread supply source by the upper thread changing device, and embroidery pattern can be selected. An embroidery sewing machine with a needle thread changing device, comprising: a pattern selection unit; a pattern display unit configured to decompose and display one embroidery pattern selected by the pattern selection unit for each color thread; An embroidery sewing machine provided with a needle thread changing device, comprising: a threading display section for displaying the threading order set in accordance with the above for each color thread. 2. The sewing machine according to claim 1, wherein when the sewing machine is started without setting the order of threading of the upper thread by the thread setting device, the plurality of upper thread set in the thread supply source. Automatic threading in order from one end side,
The embroidery sewing machine with a needle thread changing device according to claim 1, characterized in that: 3. An embroidery sewing machine with a needle thread changing device according to claim 1, wherein the setting of the thread sewing order of said upper thread by said thread hook setting means can be changed even after the sewing machine is started. . 4. A yarn conveying means for selectively catching an upper yarn from a yarn supply source having a plurality of upper yarns and drawing out the yarn to a predetermined yarn path, and an upper yarn drawn out to a predetermined yarn path by the yarn conveying means. Threading means for gripping and transporting the needle thread so as to protrude near the eye of the sewing needle, and threading means for inserting the upper thread transported by the thread passing means into the eye hole of the sewing needle. In an embroidery sewing machine with a needle thread changing device, a thread for interrupting an automatic threading operation of selectively catching, transporting, and threading a needle thread from a thread supply source by the thread conveying means, the thread passing means, and the threading means. A hook suspending operation unit; and a control unit for suspending the automatic threading operation by the thread conveying unit, the thread passing unit, and the threading unit by the thread suspending operation by the thread suspending operation unit. Embroidery sewing machine with upper thread changing device . 5. The method according to claim 1, wherein the control unit is configured to stop the automatic threading operation by the threading suspending operation of the threading suspending operation unit.
In a case where the time for interrupting the thread hooking is before the upper thread is captured by the yarn transporting means, the thread transporting means is returned to the initial position, and the time for the thread hooking interrupting operation is determined after the upper thread is captured by the thread transporting means. In this case, the yarn transfer means is moved to an upper thread gripping position by the yarn transfer means, the yarn transfer means is gripped by the upper thread, and then the yarn transfer means is returned to an initial position. An embroidery sewing machine with a needle thread changing device according to claim 4. 6. An upper thread selectively drawn out from a thread supply source having a plurality of upper threads to a predetermined thread path is conveyed so as to protrude near the eye of the sewing needle and is fed into the eye of the sewing needle. An upper thread changing device to be inserted, and a thread setting device capable of selectively setting the order of the upper yarn to be automatically changed from the thread supply source by the upper thread changing device, and set. When the embroidery sewing is interrupted in the embroidery sewing machine with the upper thread changing device that performs the embroidery sewing with the upper thread automatically changed in accordance with the threading order set by Embroidery sewing machine with a needle thread changing device, further comprising storage means for storing the automatic thread change information according to the above even after the sewing machine is turned off.