JP4272799B2 - Button attachment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a button attaching device.
[0002]
[Prior art]
FIG. 8 is a perspective view showing a conventional example of a button attaching apparatus with an automatic button supplying apparatus. The buttoning device includes a sewing machine 1, a button supply device 2, a sewing machine table 3, cloth conveying devices 4a and 4b, fabric guides 5a and 5b, an operation panel 6, and a control device (not shown).
[0003]
The sewing machine 1 includes a button knob foot 12 that holds a button and a sewing needle 14 that moves up and down. The button knob foot 12 can be moved in the vertical direction and the XY direction by a button knob foot driving means (not shown). The button supply device 2 includes a button holder 15 that stocks a plurality of buttons. The button supply device 2 moves to a predetermined position and delivers it to the button knob foot 12 while adjusting the buttons in the button holder 15 to a desired posture. The button knob foot 12 receives and holds the button supplied from the button supply device 2 in the raised state, and descends. When lowered, the button knob foot 12 presses the fabric on its lower surface. Next, the button knob foot 12 is driven in the XY directions to move the button together with the cloth, and the button is sewn to the cloth by moving the button hole through which the sewing needle 14 should pass to the needle drop point.
[0004]
The cloth conveying devices 4a and 4b are movable in the X direction (cloth feeding direction), and include cloth pressers (clamps) 28a and 28b for pressing the cloth onto the sewing machine table 3. The fabric pressers 28a and 28b are movable up and down.
The dough guides 5a and 5b are formed with elongated holes (not shown), and can be moved in the Y direction by the elongated holes and screws.
[0005]
In such a button attaching device, the position where the button supply device 2 supplies the button 8 to the button knob foot 12 is a place where the center of the button 8c is always constant, as shown in FIG. For example, it is set to the needle drop point N, and thereafter, the button knob foot 12 holding the button 8 is lowered onto the fabric and simultaneously moved in the XY direction, as shown in FIG. 9B. Thus, the button hole 8a at the start of sewing and the needle drop point N are made to coincide with each other.
[0006]
Therefore, the sewing allowance (distance from the button center 8c to the fabric side surface 7a) L and the sewing start width (distance from the button center 8c to the fabric front end 7b) W shown in FIG. The button hole 8a and the needle drop point N are determined based on the button 8 at the position where the button hole 8a and the needle drop point N coincide with each other. A scale 5M indicating the distance from the needle drop point N is formed on the fabric guides 5a and 5b.
[0007]
The work procedure when performing sewing using the buttoning device will be briefly described as follows.
[0008]
Procedure a. Predetermined sewing data stored in advance in the storage means of the control device is called by key operation on the operation panel 6.
Procedure b. The position of the fabric guide 5 in the Y direction is mechanically adjusted by a long hole and a screw in accordance with a desired sewing allowance L.
Procedure c. The button 8 is supplied from the button supply device 2 to the button knob foot 12.
[0009]
Procedure d. The dough 7 is set using the dough guides 5a and 5b. As shown in FIGS. 10 and 11, the side surface of the fabric 7 is abutted against the fabric guides 5a and 5b. As a result, the seam allowance L becomes the value adjusted in step b. Further, the sewing start width W is adjusted to a predetermined value by aligning the tip end portion of the fabric 7 with a predetermined position of the scale 5M of the fabric guide 5.
[0010]
Procedure e. A start signal is given to the buttoning device by a start switch (not shown).
Procedure f. The button knob foot 12 moves to the sewing start position while descending.
Procedure g. Sewing is started.
[0011]
[Problems to be solved by the invention]
In the case of the button attaching apparatus as described above, when the button to be sewn is changed and the button 8 having a different distance from the button center 8c to the button hole 8a at the start of sewing is sewn, the sewing allowance L and the sewing start width W change. . FIG. 12 is a diagram showing button holes 9a and 10a at the start of sewing of buttons 9 and 10 having different sizes. A case where the button 10 having a small distance from the center of the button to the button hole at the start of sewing is sewn will be described with reference to FIG. When the buttons 9 and 10 to be sewn are lowered onto the fabric 7 by the button knob foot 12, the button knob foot 12 moves so that the needle drop point N and the button holes 9a and 10a at the start of sewing coincide with each other as described above. To do. For this reason, when located on the fabric 7, the center 10c of the button 10 after the change moves by a vector b from the center 9c of the button 9 before the change. Therefore, if the position of the fabric guide 5 does not change, the sewing allowance L increases by and the sewing start width W increases by bx. Similarly, when the number of button holes is different (for example, a two-hole button and a four-hole button), the sewing allowance L and the sewing start width W are similarly changed.
[0012]
Since the position of the button center 8c changes in this way, in order to keep the seam allowance L and the sewing start width W constant, the operator must adjust the button center 8c when adjusting the fabric guide 5 in the procedure b. It is necessary to set the dough guides 5a and 5b to a correction position shifted by a predetermined amount in the Y direction in response to the change, and when setting the dough 7 to the dough guides 5a and 5b in step d, refer to the scale 5M in the X direction. It was necessary to set the correction position shifted by a predetermined amount.
[0013]
Therefore, the present invention eliminates the need for the operator to manually correct the position of the fabric guide, and hence the sewing margin, even when sewing buttons having different distances from the center of the button to the button hole at the start of sewing. An object of the present invention is to provide a buttoning device capable of improving workability by doing so.
[0014]
Further, the present invention eliminates the need for correcting the sewing start width by the operator's manual operation even when sewing buttons having different distances from the center of the button to the button hole at the start of sewing. An object of the present invention is to provide a buttoning device capable of improving the above.
[0015]
[Means for Solving the Problems]
Sewing machine table,
A button supply device for supplying the button to a predetermined position where the center of the button coincides with the needle entry point of the sewing machine ;
A button knob holding a button supplied from the button supply device;
A button picking foot control means for controlling the button picking foot to move the button down and horizontally from the predetermined position to a position where the button hole at the start of sewing and the needle drop point coincide with each other on the cloth;
A cloth guide arranged along the cloth feed direction on the sewing machine table, and the position of the center of the button is adjusted by the lowering / horizontal movement of the knob foot by placing the cloth side in contact with the cloth guide. In a buttoning device provided with a fabric guide capable of setting a distance from a needle entry point to a fabric side surface so as to keep a sewing margin constant even when moving ,
Storage means for storing position information of a hole at the start of sewing with respect to the center of the button;
Cloth guide driving means for horizontally moving the cloth guide in a direction perpendicular to the cloth feeding direction;
Cloth guide control means for controlling the cloth guide driving means to horizontally move the cloth guide in a direction orthogonal to the cloth feed direction based on the position information of the sewing start hole stored in the storage means ;
It is characterized by providing.
[0016]
The fabric guide can be moved horizontally in the direction perpendicular to the fabric feed direction by the fabric guide driving means, and the fabric guide is controlled by the fabric guide control means based on the position information of the sewing start hole stored in the storage means. By controlling the cloth guide driving means in order to move horizontally in the direction orthogonal to the cloth feeding direction, it is possible to automatically perform the cloth guide position correcting operation.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a button attaching apparatus showing an embodiment of the present invention. This buttoning device includes a sewing machine 1, a button supply device 2, a sewing machine table 3, a cloth conveying device 4, a fabric guide 5, an operation panel 6, and a control means 30 (FIG. 4) described later.
[0020]
The sewing machine 1 includes a button knob foot 12 that holds a button and a sewing needle 14 that moves up and down. The button knob foot 12 is movable in the vertical direction and the XY direction by an X motor 48a, a Y motor 48b, and a Z motor 48c (FIG. 4) for driving the button knob foot.
[0021]
The button supply device 2 includes a button holder 15 that stocks a plurality of buttons, and supplies the buttons in the button holder 15 to a predetermined position for delivery to the button knob foot 12 while adjusting the buttons in a desired posture. The button is gripped by the button knob foot 12 at the predetermined position.
[0022]
The cloth conveyance device 4 includes a first cloth conveyance device 4a and a second cloth conveyance device 4b arranged with the sewing machine 1 interposed therebetween. FIG. 2 is a perspective view showing the first cloth conveying device 4a. The cloth conveyance device 4 a is fixed to a conveyance unit 20 arranged in parallel with the sewing machine table 3, and a rack 22 is fixed to the conveyance unit 20. The rack 22 meshes with the pinion 26 rotated by the first cloth feed pulse motor 24a. When the pinion 26 rotates, the first cloth transport device 4a moves in the cloth feed direction (X direction) together with the rack 22 and the transport unit 20.
[0023]
The second cloth conveying device 4b has the same configuration as that of the first cloth conveying device 4a, and can move in the cloth feeding direction in synchronization with the first cloth conveying device 4a. Each of the first cloth conveying device 4a and the second cloth conveying device 4b includes first and second cloth pressers (clamps) 28a and 28b for pressing the cloth onto the sewing machine table 3, respectively. The first and second material pressers 28a and 28b can be moved up and down by first and second material presser cylinders 40a and 40b (FIG. 4), respectively.
[0024]
The fabric guide 5 includes first and second fabric guides 5a and 5b. As in the conventional example, the dough guides 5a and 5b are formed with a scale 5M indicating the distance from the needle drop point N as shown in FIG. And can be moved in the Y direction by screws.
[0025]
The cloth guides 5a and 5b are arranged on the sewing machine table 3 along the cloth feeding direction, and can be moved in the direction (Y direction) perpendicular to the cloth feeding direction by the driving units 16a and 16b, respectively. FIG. 3 is a simplified diagram showing the structure of the first dough guide 5a and its drive unit 16a. The first fabric guide 5a is fixed to a rack 17, and the rack 17 meshes with a pinion 18 rotated by a first fabric guide pulse motor 32a. The second fabric guide 5b has the same configuration as the first fabric guide 5a, and is driven by a second fabric guide pulse motor 32b (FIG. 4). The first and second fabric guides 5a and 5b are moved synchronously by the first and second fabric guide pulse motors 32a and 32b.
[0026]
FIG. 4 is a functional block diagram for explaining the control means of the button attaching apparatus of FIG. The control means 30 of the buttoning apparatus according to the present embodiment includes a cloth conveyance device control means 30a, a cloth presser control means 30b, a cloth guide control means 30c, and a button knob foot control means 30d. The control means 30 is specifically realized by a CPU.
[0027]
The RAM 42 has a pattern data area and a work data area, and the ROM 44 stores various programs. A plurality of pattern data are stored in advance in the pattern data area of the RAM 42. This pattern data is data necessary for sewing such as the size of the button, position information of the hole at the start of sewing with respect to the center of the button, the stitch pattern, the interval between the button holes, and the like.
[0028]
In the work data area of the RAM 42, data that can be updated every time sewing is performed, for example, position information of a hole at the start of sewing with respect to the center of the button at the time of sewing can be stored. Similarly, the control means 30 has a temporary storage means for temporarily storing data, and X direction correction data to be described later can be stored in the temporary storage means. This temporary storage means is realized by a register of the CPU. Alternatively, the X direction correction data can be stored in the work data area of the RAM 42.
An operation panel 6 and a start switch 36 are connected to the control means 30.
[0029]
The cloth conveyance device control means 30a can issue a drive command to the first and second cloth feed pulse motors 24a and 24b, and the cloth presser control means 30b drives the first and second cloth presser cylinders 40a and 40b. The cloth guide control means 30c can issue a drive command to the first and second cloth guide pulse motors 32a and 32b, and the button picking foot control means 30d is a button picking foot driving X motor. A drive command can be issued to each of the 48a button-picking foot driving Y motor 48b and the button-picking foot driving Z motor 48c.
[0030]
Next, an example of the operation of the buttoning apparatus having the above configuration will be described based on the flowchart of FIG. The button to be sewn will be described assuming that the button 9 has a sewing start hole 9a located at the position of the vector C from the button center 9c as shown in FIG.
[0031]
In step 1, the fabric guide 5 is manually set so that the distance from the needle entry point to the fabric guide 5 matches the desired seam allowance. In this operation, the position of the dough guide 5 is adjusted using a long hole and a screw.
In step 2, the operator selects a pattern from the operation panel 6.
[0032]
As a result, the pattern data is read from the RAM 42 by the control means 30 in step 3. In this pattern data, the center of the button is stored as coordinates (0, 0), and the hole at the start of sewing is stored as coordinates (Cx, Cy) in the case of FIG.
In step 4, the movement amount of the sewing start point is confirmed. That is, the above-described coordinates (Cx, Cy) are confirmed.
[0033]
In step 5, the cloth guide control means 30c corrects the cloth guides 5a and 5b based on the movement amount Cy in the Y direction of the sewing start point. That is, the fabric guide control means 30c drives the first and second fabric guide pulse motors 44a and 44 to move the fabric guides 5a and 5b by Cy in the Y direction. Specifically, the fabric guides 5a and 5b are moved to the back side by Cy in FIG.
[0034]
Next, in step 6, the cloth is set on the sewing machine table. Since the positions of the fabric guides 5a and 5b are corrected in step 5, the side edges of the fabric are placed on the fabric guide 5 so that the distance from the left end of the fabric to the needle entry point matches the desired sewing start width. Set according to the scale.
[0035]
In step 7, when the start switch 36 is turned on, the process proceeds to step 8 where the cloth presser control means 30b drives the first and second cloth presser cylinders 40a, 40b to thereby press the cloth presser. (Clamps) 28a and 28b are lowered and the fabric 7 is pressed.
[0036]
In step 9, when the start switch 36 is turned off, the process proceeds to step 10 where the sewing start width of the fabric 7 is corrected based on the movement amount Cx in the X direction of the sewing start point. That is, the cloth guide control means 30c drives the first and second cloth feed pulse motors 24a and 24b to move the cloth 7 by Cx in the X direction. Specifically, the fabric 7 is moved to the left in FIG. 1 by Cx.
[0037]
Thereafter, in step 11, the button picking foot control means 30d drives the button picking foot driving motors 48a, 48b, 48c to lower the button picking foot 12 to the cloth and the position of the button becomes the coordinates (Cx, Cy). To the horizontal direction until the sewing operation is performed at step 12.
[0038]
As described above, according to the present embodiment, the first and second fabric guide pulse motors 32a and 32b capable of moving the fabric guide 5 in the direction (Y direction) orthogonal to the fabric direction, and the pulse motors 32a and 32a, Since the cloth guide control means 30c for controlling 32b is provided, the cloth guide position correcting operation in step 5 can be automatically performed.
[0039]
In step 1, the fabric guide 5 is set manually by the operator, but the first and second fabric guide pulse motors 32a and 32b and the fabric guide control means 30c for controlling the pulse motors 32a and 32b are used. It is also possible to automatically perform the setting operation of step 1 using. In this way, the work of setting the dough guides 5a and 5b in the Y direction using the long holes can be omitted. Accordingly, the position adjustment of the dough guides 5a and 5b can be performed completely automatically, and the long holes and screws for manually moving the dough guides 5a and 5b in the Y direction can be omitted. .
[0040]
Further, according to the present embodiment, the X-direction correction operation (sewing start width correction operation) in step 10 is automatically performed by the cloth conveyance device control means 30a that controls the movement of the cloth conveyance device in the cloth feeding direction. It became possible.
[0041]
Next, another example of the operation of the buttoning apparatus having the above configuration will be described based on the flowchart of FIG. This is an example of an operation using the previous sewing data in order to correct the positions of the fabric guides 5a and 5b in accordance with the change in the sewing conditions. It should be noted that the button to be sewed has a sewing start hole 9a as shown in FIG. 7 (b) from a large button 9 in which the sewing start hole 9a as shown in FIG. A description will be given based on the case where the button center 10c is changed to the small button 10 at the position of the vector D. The seam allowance and the sewing start width are not changed.
[0042]
In step 1, the operator selects a pattern from the operation panel 6.
As a result, the pattern data is read from the RAM 42 by the control means 30 in step 2. This pattern data stores the center of the button as coordinates (0, 0), the hole at the start of sewing as coordinates (Cx, Cy) in the case of FIG. 7A, and (Dx in the case of FIG. 7B). , Dy).
In step 3, the movement amount of the sewing start point is confirmed. That is, the aforementioned coordinates (Dx, Dy) are confirmed.
[0043]
In step 4, the movement amount data (Cx, Cy) stored in the work data area in the RAM 42 is compared with the movement amount data (coordinates) of the currently selected pattern, and the movement amount data (coordinates) is compared. It is determined whether or not a change has been made. If there is a change, the process proceeds to step 5, and if there is no change, the process proceeds to step 7.
[0044]
In step 5, the cloth guide control means 30c corrects the cloth guides 5a and 5b based on the change amount (Dy−Cy) in the Y direction of the movement amount data. That is, the fabric guide control means 30c drives the first and second fabric guide pulse motors 44a and 44 to move the fabric guides 5a and 5b in the Y direction by (Dy-Cy). Specifically, the fabric guides 5a and 5b are moved forward by | Dy−Cy | in FIG.
[0045]
Next, in step 6, the coordinate data of the work data area is updated to (Dx, Dy), and the change amount (Dx-Cx) of the movement amount data in the X direction is stored in the temporary storage means of the control means 30 or the work of the RAM 42. Is stored in the data area as X direction correction data.
[0046]
In Step 7, since the change amount in the X direction of the movement amount data is 0, 0 is stored as the X direction correction data in the temporary storage means of the control means 30 or the work data area of the RAM 42.
[0047]
In step 8, the dough is set on the sewing machine table. At this time, the side end of the fabric is set in accordance with the scale of the fabric guide 5 so that the distance from the left end of the fabric to the needle entry point matches the desired sewing start width.
[0048]
In Step 9, when the start switch 36 is turned on, the process proceeds to Step 10 where the cloth presser control means 30b drives the first and second cloth presser cylinders (clamps) 40a and 40b. Thus, the fabric pressers 28a and 28b are lowered to press the fabric 7.
[0049]
In step 11, the start switch 36 is awaited to be turned off. If turned off, the process proceeds to step 12, and the fabric is determined based on the X direction correction data in the temporary storage means of the control means 30 or the work data area of the RAM 42. 7 The sewing start width is corrected. That is, since the X direction correction data is (Dx−Cx), the fabric guide control means 30c drives the first and second fabric feed pulse motors 24a and 24b to move the fabric 7 in the X direction (Dx−Cx). ) Just move. Specifically, the cloth 7 is moved to the right side in FIG. 1 by | Dx−Cx |. When the X direction correction data is 0, the movement amount of the cloth conveying device in step 12 is also 0.
[0050]
Thereafter, in step 13, the button knob foot control means 30 d drives the button knob foot driving motors 48 a, 48 b, 48 c to lower the button knob foot 12 onto the fabric and move in the horizontal direction. Perform the action.
[0051]
As mentioned above, although this invention was demonstrated based on embodiment shown in drawing, it is not limited to embodiment of this invention box, A various deformation | transformation is possible.
[0052]
【The invention's effect】
According to the present invention, based on the cloth guide driving means for horizontally moving the cloth guide in the direction orthogonal to the cloth feeding direction and the position information of the sewing start hole stored in the storage means , the cloth guide is moved in the cloth feeding direction. Since the cloth guide control means for controlling the cloth guide driving means for horizontally moving in the orthogonal direction is provided, the cloth guide position correcting operation (sewing margin correction) can be automatically performed. Since it is no longer necessary to manually correct the position of the dough guide as in the prior art, workability has been greatly improved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a button attaching apparatus showing an embodiment of the present invention.
FIG. 2 is a perspective view showing a cloth conveying device of the apparatus of FIG.
3 is a simplified diagram showing the structure of the dough guide and its drive unit of the apparatus of FIG. 1. FIG.
4 is a functional block diagram of control means of the button attaching apparatus of FIG. 1; FIG.
FIG. 5 is a flowchart showing an example of the operation of the button attaching device of FIG. 1;
FIG. 6 is a flowchart showing another example of the operation of the button attaching device of FIG. 1;
FIG. 7 is a plan view showing buttons having different distances from the center of the button to a sewing start hole, (a) showing a button with a long distance, and (b) showing a small button.
FIG. 8 is a perspective view showing a conventional example of a button attaching device with an automatic button supply device.
FIGS. 9A and 9B are diagrams for explaining horizontal movement of a button by a button picking foot, where FIG. 9A is a button position when received from a button supply device, and FIG. 9B is a button position when the button is lowered onto a cloth; Indicates the position.
FIG. 10 is a plan view for explaining the setting of the dough by the dough guide.
FIG. 11 is a plan view for explaining the setting of the dough by the dough guide.
FIG. 12 is a view showing button holes at the start of sewing of buttons having different sizes in a matched manner.
[Explanation of symbols]
L ... stitching allowance N ... needle entry point W ... sewing start width 1 ... sewing machine 2 ... button supply device 3 ... sewing machine table 4, 4a, 4b ... cloth transfer device 5, 5a, 5b ... fabric guide 5M ... scale 6 ... operation panel 7 ... fabric 7a ... fabric side 7b ... fabric front end 8, 9, 10 ... buttons 8a, 9a, 10a ... Button hole at the start of sewing 8c, 9c, 10c ... Button center 12 ... Button knob 14 ... Sewing needle 15 ... Button holder 16a, 16b ... Fabric guide drive unit 24a, 24b ... cloth feed pulse motors 28, 28a, 28b ... cloth presser (clamp) 30 ... control means 30a cloth conveying device control means 30b ... cloth presser control means 30c ... cloth guide control means 30d ... button knob control means 32a, 32b ... cloth guide pulse motor 36 ... start switch 40a, 40b ... cloth presser cylinder 42 ... RAM 44 ... ROM
48a ... X motor for driving the button knob 48b ... Y motor 48c for driving the button knob Zc motor for driving the button knob

Claims (1)

Sewing machine table,
A button supply device for supplying the button to a predetermined position where the center of the button coincides with the needle entry point of the sewing machine ;
A button knob holding a button supplied from the button supply device;
A button picking foot control means for controlling the button picking foot to move the button down and horizontally from the predetermined position to a position where the button hole at the start of sewing and the needle drop point coincide with each other on the cloth;
A cloth guide arranged along the cloth feed direction on the sewing machine table, and the position of the center of the button is adjusted by the lowering / horizontal movement of the knob foot by placing the cloth side in contact with the cloth guide. In a buttoning device provided with a fabric guide capable of setting a distance from a needle entry point to a fabric side surface so as to keep a sewing margin constant even when moving ,
Storage means for storing position information of a hole at the start of sewing with respect to the center of the button;
Cloth guide driving means for horizontally moving the cloth guide in a direction perpendicular to the cloth feeding direction;
Cloth guide control means for controlling the cloth guide driving means to horizontally move the cloth guide in a direction orthogonal to the cloth feed direction based on the position information of the sewing start hole stored in the storage means ;
A buttoning device comprising:

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