JPS60236684A - Automatic feeder of material to be processed used in cycle stitching sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an automatic feeding device for a workpiece material used in a cycle sewing machine such as a buttonhole sewing machine or a buttonhole sewing machine.

(Prior Art/Technology and Problems) Cycle sewing machines such as buttonhole sewing machines are generally equipped with a start/stop mechanism, and are designed to automatically stop after each overlocking process is completed. There is.

That is, the needle bar is driven via a start/stop mechanism by a starting operation, and as a result of this drive, the needle bar with a needle at the lower end moves up and down at a fixed position, and its amplitude in the left and right direction and the base line change, In addition, the cloth feeding mechanism reciprocates the cloth in a direction perpendicular to the direction of needle vibration to form a buttonhole stitch, and stops after forming the buttonhole stitch. Therefore, when forming a plurality of buttonholes on shirts using a buttonhole overstitch sewing machine in rows at predetermined intervals, it is common practice to first prepare the material to be processed, such as the shirt fabric. After marking the intended buttonhole stitching position with a chalk, etc., place the marked part under the needle of the sewing machine one by one, and operate the starting operation member such as a foot pedal each time.
A method is used in which buttonhole stitches are formed individually.

Therefore, such buttonhole stitching requires much more time and effort, from the preparation work of marking the material to the hole stitching, and requires only one sewing machine for one worker. There were problems such as being unable to use it and having poor work efficiency.

On the other hand, in order to solve the above-mentioned problems, recently, the sewing machine itself has been equipped with a machine that holds the material to be processed at a predetermined distance every time one buttonhole or six stitches are completed.

A machine equipped with an automatic feed mechanism that automatically moves the next stitch so that the next seam formation position is exposed below the sewing machine head has been developed and is commercially available (for example, " JUKI LBH-761-AI-1N type continuous automatic sleep overlock sewing machine").

However, cycle stitch sewing machines equipped with an automatic feeder as described above are themselves very expensive and are highly specialized machines, so in general sewing factories, they are practically not equipped with equipment. It was difficult to do so.

(Objective of the Invention) In view of the above-mentioned circumstances, the present invention utilizes a conventionally widely used cycle stitch sewing machine as it is, and attaches a separate device to the machine as necessary, thereby making it possible to sew the material to be processed. It is an object of the present invention to provide an automatic work material feed device as a mounting attachment that can be constructed on a sewing machine equipped with an automatic feed mechanism.

(Structure of the Invention) For the above purpose, the present invention includes a fixed rail detachably attached to a sewing machine table, a movable frame movably supported along the rail, and a part to be processed below the sewing machine head. After the first buttonhole stitch is started by the start operation of the fabric gripping device that tensions the workpiece material on the movable frame and the start/stop mechanism provided in the sewing machine, the final nth buttonhole stitch is started. an intermittent drive mechanism that detects the completed state each time unit stitch formation is completed and moves the movable frame by a predetermined distance in the process of completing sewing; and stopping the movement of the movable frame during the process. and a drive command mechanism that detects this and issues a drive command to the sewing machine, and the intermittent drive mechanism is capable of variably setting each stroke distance of the intermittent traveling movement of the movable frame. The gist of this paper is an automatic feeding device for workpiece materials used in cycle sewing machines, which is characterized by:

(Example) In order to facilitate understanding of the present invention, the configuration will first be specifically explained based on the illustrated example.

In the illustration, a cycle stitch sewing machine (1) configured for sewing buttonholes is driven, for example, by depressing a foot pedal (6) (see FIG. 7), and stitches buttonholes with a fixed number of stitches. It has a known construction with a start/stop mechanism operable to stop after the eye is formed.

The automatic feeding device for workpiece materials according to the present invention is used by being attached separately to the existing cycle stitch sewing machine as described above, and the main components include a fixed rail (10) and a movable frame. (20) and a fabric gripping device (
30) and an intermittent drive mechanism (40) of the movable frame (20).
) and a drive command mechanism (50). The configuration of each of these parts is as follows.

The fixed rail (10) is made of a metal angle member of a predetermined length, and as shown in Figs. 1 and 4, a pair of vise-type fixing devices I ( 11), and the fixing device number can be detachably fixed along the front edge of the sewing machine table (2).

The movable frame (20) is supported so as to be movable along the fixed rail (10), and is attached to the sewing machine bed (3).
), and a pair of track wheels (23) that roll on fixed rails (10) attached to the lower surface of the frame (21) via appropriate legs (22). It is equipped with free wheels (24) that move over the surface of the sewing machine table (2).

And the left and right side frame portions (21a) of the cloth receiving frame (21) (
A fabric gripping device (30) consisting of a pair of clips (31) (32) is attached to 21a). One of the clips (31) is attached to the side frame (21a) via an elastic member (33) such as a rubber cord, and therefore both clips (31) and (32) are attached to the shirt. By clamping a predetermined part of the material to be processed, such as cloth, the main force of the head of the sewing machine (1) is applied to the part of the material to be processed, such as the left and right front side edges of a shirt, in a tensioned state. It is considered something to be gained.

Intermittent drive device for movable frame (20)! (4G> is
After starting the first buttonhole stitching by operating the start switch (SW5) (see Fig. 7), until the completion of the final nth buttonhole stitching, each time one unit hole stitching is completed. Then, the movable frame (20) is moved by a predetermined distance by detecting the completed state. Therefore, the configuration of this mechanism can be selected in any design in a manner that can realize the above effect, but
The illustrated embodiment has the following configuration.

That is, first, as shown in FIG. 3, the movable frame (20) is always elastically pulled to the left by a pulling wire (41) connected to a part of the movable frame (20). Such traction force can be applied, for example, by suspending the other end of the wire ('41) so that it can slip freely on a suitable rotating pulley that is linked to a drive motor (not shown) provided in the sewing machine (1). be done.

In response to the movement biasing force of the movable frame (20) in one direction, the -C1 movable frame (20) moves against the fixed rail (1), as can be seen by referring to FIGS. 2 to 4.
Free movement of the movable frame (20) is prevented by the collision between the locking lever (42) provided on the movable frame (20) side and the stopper (43) provided on the movable frame (20) side. That is, as shown in FIG.
A locking lever (4) having a locking claw (42a) at the tip is attached to the upper end of a support plate (44) erected at approximately the midpoint in the length direction.
2) is pivoted in a horizontal position, while the movable frame (2)
Attach the required number of downward opening-shaped stoppers (4
3) are attached at predetermined intervals, and when the locking claw (42a) abuts against one end surface of each stopper (43), the movable frame (20) is held in a stopped state. ing.

This stopped state must be released once every time the sewing machine (1) completes forming one buttonhole stitch. For this purpose, the locking lever (42) is connected to a solenoid (46) whose tail end is attached to the fixed rail (10).
The locking lever (42) can be temporarily swung in the unlocking direction against the double-acting coil spring (48) by driving the solenoid. Chinoto' has been done. As shown in FIG. 6, the above-mentioned solenoid (46) is operated by focusing on the fact that the fabric presser (5) moves upward and backward every time the formation of one buttonhole stitch is completed. A seam formation completion detection switch (SWl) consisting of a microswitch is disposed in the drive mechanism (4) that controls the raising and lowering of the presser foot (5), and is activated when the cloth presser foot moves back.

The above-mentioned stopper (43) defines the interval between buttonholes formed in the workpiece 6 material by the arrangement interval thereof. Therefore, the arrangement pitch of the stoppers (43) is
This must be variable and adjustable. Therefore, the stopper (43) is loosely fitted to the reference member (45) so that it can freely slide, and can be positioned at any desired position by means of a fixing screw (43a) screwed in from the front side, as shown in FIG. It is fixed with Uchino.

By the way, the movable frame (20) is a stopper (43)
The individual stop positions that are prevented from moving by the sewing machine (
1) corresponds to the position where a buttonhole stitch is to be formed in the workpiece material (A). Therefore, at this time of stopping, it is necessary to give a drive command to the start/stop mechanism of the sewing machine (1). The drive command to decline can be given by activating a solenoid (51) using a travel stop detection switch (SW2) (see FIGS. 5 and 7) consisting of a microswitch. The travel stop detection switch is provided facing the rear side of the stopper (43) row on the switch base (52) fixed to the fixed rail (10) as shown in Figure #I5. , by opposing and contacting the switch operating piece (53) attached to the center back of the stopper (43) (excluding one stopper (43') at the left end in the figure), the electric circuit to which it belongs is activated. It is designed to act as if it were to close. On the other hand, N, Lenoid (51)
is connected to the starting foot pedal (6) via a transmission lever (54) as shown in Fig. 7, and its excitation operation causes the pedal to operate in the same manner as when the pedal is depressed, thereby starting the cycle sewing machine (1). ).

In Fig. 7, (SW3) is a switch for manual sewing work in the solenoid (46) circuit, and (SW4) (SWa) are automatic sewing work switches that belong to each circuit of solenoid (46) and solenoid (51), respectively. It is a switch for

(effect) The operation of the apparatus shown in the above embodiment is as follows.

First, the stopper (
4 and 3) on the reference post (45) and fix them at intervals corresponding to the buttonhole intervals to be formed in the workpiece material (A>.This fixing is done by tightening the fixing screws (43a). This is done by tightening.

Next, as shown in FIGS. 1 and 2, a predetermined portion of the workpiece material (A) on which buttonholes are to be formed, such as a shirt, is gripped by the fabric device (3G) and tensioned against the movable frame (20). tension in the condition.

After that, the movable frame (20) is moved from the illustrated state to the right by hand against the biasing force of the traction wire (41), and the locking lever (42) is moved to the stopper (43) located at the right end. It is stopped and held at the position where the locking pawl (42a) contacts. At this position, the first buttonhole stitch (A1) of the workpiece material (A) is exposed under the needle of the sewing machine (1).

After completing the preparation work as described above, turn on the automatic sewing switches (SW4) (SWa >), then turn on the manual switch (SW4) that also serves as the start button.
Insert W5).

Then, the solenoid (54) is actuated to bring about a state in which the foot pedal (6) is pressed, and the sewing machine is activated to form the overlock stitch (a1) of the first buttonhole.

After completing the formation of these 11 buttonhole stitches, use the sewing machine (
1) If it stops automatically by its own start/stop mechanism, the fabric presser (5) is raised. Then, the stitch formation completion detection switch (SW1') is turned on, and the solenoid (46) is activated. As a result, the locking lever (
42) swings as shown by the chain line in FIG. 5, and is released from the stopper (43). Therefore, the movable frame (20) moves to the left in FIG. 1 and to the right in FIG. 5 by the traction force by the traction wire Iy- (41). On the other hand, when the locking lever (42) passes over one stopper (43), it is rotated back to the original operating position by the force of the reciprocating spring (48). As a result, the next stopper (43) comes into contact with the tip of the locking lever (42) again, and the movable frame (20) stops at the position where the second buttonhole stitch (A2) is planned to be formed. be done.

Also, just before this stop, the stop detection switch (SW2) contacts the switch operation piece (53) on the back of the stopper (43) and turns ON, thereby exciting and operating the solenoid (51). , the same sewing machine as above (
1) Re-drive.

The above operations are repeated to form the required number of buttonhole stitches, and when the last stitch (in) is completed, the locking lever (42) does not have a switch operation piece. It hits the left end stopper (43') and stops the movable frame (20). However, at this time,
Since the switch (SW2) remains inactive, the sewing machine (1) does not restart.

Therefore, after confirming that this state has been reached, the worker should move the processed material (A) to the fabric gripping device (
30), replace it with a new unprocessed workpiece material (A), and repeat the same operation as above.

(Development of Embodiment) As for the specific design specifications within the scope of the above-described gist of the invention, the intermittent drive mechanism for moving the seed (20) by a predetermined distance is mounted on the movable frame itself. □ gear for driving! It is also permissible to incorporate a motor and control its rotation speed to move the movable frame a predetermined distance per drive. Furthermore, the unit stitch formation completion detection means for giving a travel start command to the movable frame (20) does not necessarily require a signal to be derived from the behavior of the fabric presser as in the embodiment, but rather to detect the stop of the sewing machine. In addition, the use of the device as in the embodiment is not limited to the illustrated embodiment, as it can be removed from any part of the starting/stopping mechanism.
In the state shown in the product diagram, the fixed rail (10) is placed in a direction perpendicular to the head of the sewing machine, and the workpiece material (A) is
A long buttonhole (
In other words, we have explained the case □ where so-called horizontal holes are formed at predetermined intervals.
0) in a parallel direction and place it on the workpiece material.
It is also possible to use it to form a button hole (so-called vertical hole) that is long in the feeding direction. However, in this case, in order to correctly guide the workpiece stretched over the movable frame (20) directly below the sewing machine head, an attachment such as that used in known buttonhole overstitch sewing machines with a crystal feed device is also used. It is necessary.

Furthermore, the automatic feed device for workpiece material according to the present invention is applicable not only to buttonhole sewing machines but also to cycle sewing machines that perform some processing on workpiece materials at predetermined intervals, such as buttonhole sewing machines. It is widely applicable. However, even if the product is used for these purposes, it can naturally be used for buttonhole stitching, so all descriptions in this specification will refer to cases where buttonhole stitches are formed. This is explained as a representative example.

(Effects of the Invention) As is already clear from the above-described embodiments, the present invention is capable of setting a workpiece material in a stretched state using a fabric gripping device on a movable frame, and then starting the material once. By just performing the operation, a plurality of buttonholes from the first buttonhole to the nth buttonhole can be overlocked at predetermined intervals on the workpiece material completely automatically. Therefore, for example, the labor required to form buttonholes in the sewing process of shirts can be greatly reduced, and one worker can receive and use multiple cycle sewing machines at the same time. It can greatly contribute to improving production quality.

Although the above-mentioned effects can be similarly achieved even if the sewing machine itself is equipped with an automatic feeding device for the workpiece material, one of the important advantages of this invention is that By attaching it later as a kind of attachment to an existing cycle stitch sewing machine that is not equipped in advance, it is possible to use the existing sewing machine as one equipped with an automatic feed device as described above. Particularly, because the automatic feeding device according to the present invention has the above-described configuration, it can be manufactured and provided at a relatively low cost;1. Compared to installing a commercially available cycle stitch sewing machine equipped with an automatic feeder,
It is much cheaper to install the device of the present invention on a sewing machine that does not have this device, in terms of equipment costs! It is advantageous for

[Brief explanation of drawings]

The drawings show an embodiment of the invention, and FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is a side view.
FIG. 5 is a perspective view of the intermittent drive mechanism section viewed from the back side, FIG. 6 is a schematic sectional view of the buttonhole stitch formation completion detection mechanism section, and FIG. 7 is an electric circuit diagram. (1)...Sewing machine, (2)...Sewing machine table, (
10) Fixed rail, (20) Movable frame, (30) Fabric gripping device, (31) (32)
... Clip, (40) ... Intermittent drive mechanism 1. (41
)...Tow wire, (42)...Latching lever, (
43)...Stopper, (46)...Y Lenoid,
(50)...Drive command unit 11! , (51)... Solenoid, (53)... Switch operation piece, (SVh)
... Stitch formation completion detection switch, (SW2) ... Travel stop detection switch. Patent applicant: Shikoku Izumi Orizo Co., Ltd.

Claims (1)

[Claims] A fixed rail that is detachably attached to the sewing machine table,
A sewing machine is provided with a movable frame movably supported along the rail, and a fabric gripping device for tensioning a workpiece material on the movable frame with a workpiece part facing below the sewing machine head in a tensioned state. After the first buttonhole stitching is started by the starting operation of the start/stop mechanism, and until the final nth buttonhole stitching is completed, the completion state is detected each time the unit stitch formation is completed, and the The intermittent drive mechanism includes an intermittent drive mechanism that moves the movable frame by a predetermined distance, and a drive command mechanism that detects when the movable frame stops moving in the middle and issues a drive command to the sewing machine, and the intermittent drive mechanism includes: An automatic feeding device for a workpiece material used in a cycle stitch sewing machine, characterized in that each stroke distance of intermittent travel of a movable frame can be set edibly. .