JP2001340676A - Button sewing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for manual correction of the position of a cloth guide by a worker even if a button for which the distance from the center of the button to a hole of the button from which sewing is to be started is different. SOLUTION: A button pinching leg 12 holding a button 8 fed from a button feeder 2, a button pinching leg control means 30d controlling the button pinching leg to make it move up and down and horizontally so that the button may come on a fabric and a hole 8a of the button and a needle falling point N may coincide, a fabric guide 5 capable of setting the distance L from the needle falling point N to the side of the fabric by arranging the side of the fabric, making it butt against the fabric guide, a fabric guide driving means 16 and 32 moving horizontally the fabric guide in the direction perpendicular to the fabric feeding direction and a fabric guide control means 30c controlling the fabric guide driving means to horizontally move the fabric guide in the direction perpendicular to the fabric feeding direction in accordance with the physical relationship between the button center and a hole of a button from which sewing is to be started.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a button attaching device.

[0002]

2. Description of the Related Art FIG. 8 is a perspective view showing a conventional example of a button attaching device with an automatic button supplying device. The button attaching device includes a sewing machine 1, a button supply device 2, and a sewing machine table 3.
And cloth conveying devices 4a and 4b, and cloth guides 5a and 5b
, An operation panel 6 and a control device (not shown).

The sewing machine 1 has a button knob 12 for gripping a button and a sewing needle 14 which moves up and down. The button knob 12 can be moved in the vertical and XY directions by a button knob driving means (not shown). The button supply device 2 includes a button holder 15 for stocking a plurality of buttons, and moves the button in the button holder 15 to a predetermined position and transfers it to the button knob 12 while adjusting the buttons in a desired posture. The button knob 12 receives and holds the button supplied from the button supply device 2 in the raised state, and moves down. When descending, the button knob 12 presses the fabric on its lower surface. Next, the button knob 12 is XY
The button is sewn to the fabric by being driven in the direction to move the button together with the fabric and by moving the hole of the button through which the sewing needle 14 passes to the needle drop point.

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 cloth holders 28a and 28b are vertically movable. The cloth guides 5a and 5b are formed with a long hole (not shown), and can be moved in the Y direction by the long hole and a screw.

In such a button attaching device, the position at which the button supply device 2 supplies the button 8 to the button knob 12 is
As shown in FIG. 9A, the position of the center 8c of the button is always set to a fixed position, for example, the needle drop point N, and then the button knob 12 holding the button 8 is moved to At the same time as moving down, it is moved in the XY direction, and FIG.
As shown in (b), the button hole 8a at the start of sewing coincides with the needle drop point N.

Accordingly, the sewing allowance shown in FIG.
) And the sewing start width (the distance from the button center 8c to the cloth front end 7b) W are determined by the button hole 8a at the start of sewing when the button knob 12 descends and the needle drop point N. It is determined on the basis of the button 8 at the matched position. 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 for performing sewing using the button attaching device will be briefly described as follows.

Procedure a. The predetermined sewing data stored in advance in the storage means of the control device is called by operating the keys on the operation panel 6. Procedure b. The position of the cloth guide 5 in the Y direction is mechanically adjusted with a long hole and a screw in accordance with a desired sewing margin L. Procedure c. The button 8 is supplied from the button supply device 2 to the button knob 12.

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 cloth 7 is abutted against the cloth guides 5a and 5b. Thereby, the seam allowance L becomes the value adjusted in the procedure b. Further, the sewing start width W is adjusted to a predetermined value by adjusting the leading end of the cloth 7 to a predetermined position on the scale 5M of the cloth guide 5.

Procedure e. A start signal is supplied to the button attaching device by a start switch (not shown). Procedure f. The button knob 12 moves to the sewing start position while descending. Procedure g. Sewing is started.

[0011]

In the case of the button attaching apparatus as described above, the buttons to be sewn are replaced and the buttons 8 having different distances from the button center 8c to the button hole 8a at the start of sewing are sewn. The width W at the start of sewing changes. FIG. 12 shows button holes 9a and 10a at the start of sewing of buttons 9 and 10 having different sizes.
FIG. The 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 knobs 12, the button knobs 12 move so that the needle drop point N and the button holes 9a and 10a at the start of sewing match as described above. I do. For this reason, when located on the cloth 7, the center 10c of the button 10 after the change moves by the 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 margin 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 margin L and the sewing start width W are similarly changed.

As described above, since the position of the button center 8c changes, in order to keep the sewing margin L and the sewing start width W constant,
When the worker adjusts the cloth guide 5 in step b, the worker adjusts the cloth center 5c in accordance with the change of the button center 8c.
It is necessary to set the correction positions a and 5b at the correction positions shifted by a predetermined amount in the Y direction, and at the time of setting the cloth 7 on the cloth guides 5a and 5b in step d, the correction positions shifted by a predetermined amount in the X direction with reference to the scale 5M. Had to be set to

Therefore, the present invention corrects the position of the cloth guide manually by the operator even when sewing buttons having different distances from the center of the button to the button hole at the start of sewing, and thus corrects the sewing allowance. It is an object of the present invention to provide a button attaching device capable of improving workability by eliminating the need.

Further, the present invention eliminates the need to manually correct the sewing start width even when sewing buttons having different distances from the center of the button to the button hole at the start of sewing. It is an object of the present invention to provide a button attaching device capable of improving workability.

[0015]

According to the present invention, there is provided a sewing machine table, a button supply device for supplying a button to a predetermined position, and a button supplied from the button supply device. A button knob for controlling the button knob and the button knob so that the button can be lowered and horizontally moved from the predetermined position to a position where the buttonhole at the start of sewing and the needle drop point coincide with the needle hole. A control means, and a cloth guide arranged on the sewing machine table along the cloth feeding direction, wherein the distance from the needle drop point to the cloth side is obtained by arranging the side of the cloth in contact with the cloth guide. A fabric guide that can be set, fabric guide driving means for horizontally moving the fabric guide in a direction orthogonal to the fabric feeding direction, and the fabric guide in the fabric feeding direction according to a positional relationship between a button center and a button hole at the start of sewing. Horizontal shift in the direction orthogonal to Button with device characterized by comprising a fabric guide control means, the controlling of the fabric guide driving means in order to are provided.

A cloth guide driving means for horizontally moving the cloth guide in a direction perpendicular to the cloth feeding direction;
The cloth guide control means controls the cloth guide driving means to horizontally move the cloth guide in a direction orthogonal to the cloth feeding direction according to the positional relationship between the button center and the button hole at the start of sewing, thereby controlling the cloth guide. The position correction operation can now be performed automatically.

According to the invention, a sewing machine table, a button supply device for supplying a button to a predetermined position, a button knob for holding a button supplied from the button supply device, and a button knob for controlling the button knob A button pick-up control means for lowering and horizontally moving the button from the predetermined position to a position on the cloth and at which a needle drop point coincides with a button hole at the start of sewing; and a cloth transport device for transporting the cloth. And a cloth guide arranged along the cloth feeding direction on the sewing machine table, a scale indicating a distance from a needle drop point of the sewing machine is formed, and a side of the cloth is placed in contact with the cloth guide. And, by adjusting the position of the front end of the cloth to a desired scale, a cloth guide capable of setting the distance from the needle drop point to the front end of the cloth, and the cloth according to the positional relationship between the button center and the button hole at the start of sewing. Cloth transport that moves the transport device in the fabric feed direction Button with apparatus characterized by comprising: a 置制 control means, is provided.

By providing a cloth conveying device control means for moving the cloth conveying device in the cloth feeding direction according to the positional relationship between the button center and the button hole at the start of sewing, the cloth feeding direction correcting operation (sewing start width Correction operation) can be performed automatically.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a button attaching device showing an embodiment of the present invention. This button attaching device includes a sewing machine 1, a button supply device 2, a sewing machine table 3, a cloth transport device 4, a cloth guide 5, an operation panel 6, and a control means 30 (FIG. 4) to be described later.

The sewing machine 1 has a button knob 12 for holding a button, and a sewing needle 14 which moves up and down. The button knob 12 includes an X motor 48a and a Y motor 4 for driving the button knob.
8b, Z motor 48c (FIG. 4),
It is possible to move in the direction.

The button supply device 2 includes a button holder 15 for stocking a plurality of buttons, and supplies the buttons in the button holder 15 to a predetermined position for transfer to the button knob 12 while keeping the buttons in a desired posture. The button is the button knob 1
2 to be gripped.

The cloth transporting device 4 comprises a first cloth transporting device 4a and a second cloth transporting device 4b arranged with the sewing machine 1 interposed therebetween. FIG. 2 is a perspective view showing the first cloth transport device 4a. The cloth transport device 4a is fixed to a transport unit 20 arranged parallel to the sewing machine table 3, and a rack 22 is fixed to the transport unit 20. The rack 22 meshes with a pinion 26 rotated by a first cloth feed pulse motor 24a. When the pinion 26 rotates, the rack 2
2. The first cloth conveying device 4a moves in the cloth feeding direction (X direction) together with the conveying section 20.

The second cloth conveying device 4b has the same configuration as 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 and second cloth transport devices 4a and 4b includes first and second cloth presses (clamps) 28a and 28b for pressing the cloth onto the sewing machine table 3. The first and second fabric pressers 28a and 28b are vertically movable by first and second fabric press cylinders 40a and 40b (FIG. 4), respectively.

The fabric guide 5 comprises first and second fabric guides 5a and 5b. Similar to the conventional example, a scale 5M indicating the distance from the needle drop point N is formed on the fabric guides 5a and 5b as shown in FIG. 10, and a slot (not shown) is formed. And the screw can move in the Y direction.

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) orthogonal to the cloth feeding direction by the drive units 16a and 16b, respectively. ing. FIG. 3 is a simplified diagram showing the structure of the first fabric guide 5a and its driving unit 16a. The first fabric guide 5a is fixed to the rack 17,
The rack 17 is provided with a first cloth guiding pulse motor 32.
meshes with the pinion 18 rotated by a. The second fabric guide 5b has the same configuration as the first fabric guide 5a, and is driven by the second fabric guide pulse motor 32b (FIG. 4). The first and second fabric guides 5
a and 5b are first and second cloth guiding pulse motors 3;
It moves synchronously by 2a and 32b.

FIG. 4 is a functional block diagram for explaining the control means of the button attaching device of FIG. The control unit 30 of the button attaching device of the present embodiment includes a cloth transport device control unit 30a,
Dough presser control means 30b, dough guide control means 30c,
It is composed of button knob control means 30d. The control means 30 is specifically realized by a CPU.

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 is stored in the pattern data area of the RAM 42 in advance. This pattern data is data necessary for sewing such as the size of the button, the position information of the hole at the start of sewing with respect to the center of the button, the stitch pattern, the distance between the button holes, and the like.

The work data area of the RAM 42 can store data that can be updated each time sewing is performed, for example, information on the position of the hole at the start of sewing with respect to the center of the button during sewing. Similarly, the control means 30 has temporary storage means for temporarily storing data, and can store X-direction correction data described later 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. The operation panel 6 and the start switch 36 are connected to the control means 30.

The cloth transport device control means 30a comprises a first and a second
Can be issued to the cloth feed pulse motors 24a and 24b, and the cloth press control means 30b can issue a drive command to the first and second cloth press cylinders 40a and 40b, and the cloth guide control means 30c Can issue a drive command to the first and second cloth guiding pulse motors 32a and 32b, and the button knob control means 30d includes a button knob X motor 48a and a button knob Y motor 4.
8b, a drive command can be issued to each of the button knob foot driving Z motors 48c.

Next, an example of the operation of the button attaching device having the above configuration will be described with reference to the flowchart of FIG. The button to be sewn will be described on the assumption that the sewing start hole 9a is the button 9 at the position of the vector C from the button center 9c as shown in FIG.

In step 1, the cloth guide 5 is manually set so that the distance from the needle drop point to the cloth guide 5 matches the desired sewing allowance. In this operation, the position of the cloth guide 5 is adjusted using a long hole and a screw. Step 2
Then, the operator selects a pattern from the operation panel 6.

Thus, in step 3, the pattern data is read from the RAM 42 by the control means 30. In this pattern data, the center of the button is stored as coordinates (0, 0), and the hole at the start of sewing is coordinate (Cx,
Cy). In step 4, the moving amount of the sewing start point is confirmed. That is, the coordinates (Cx,
Cy) is confirmed.

In step 5, the dough guide control means 30
With c, the cloth guides 5a and 5b are corrected based on the movement amount Cy of the sewing start point in the Y direction. That is, the cloth guide control means 30c drives the first and second cloth guiding pulse motors 44a, 44 to drive the cloth guides 5a, 5b.
Is moved by Cy in the Y direction. Specifically, the cloth guides 5a and 5b are moved to the far side in FIG. 1 by Cy.

Next, in step 6, the dough is set on the sewing machine table. In step 5, dough guides 5a, 5
Since the position of b is corrected, the distance from the left end of the fabric to the needle drop point matches the desired sewing start width,
What is necessary is just to set the side edge of the fabric according to the scale of the fabric guide 5.

In step 7, the process waits for the start switch 36 to be turned on. When the start switch 36 is turned on, the process proceeds to step 8, and
The fabric press control means 30b drives the first and second fabric press cylinders 40a, 40b to lower the fabric presses (clamps) 28a, 28b to press the fabric 7.

In step 9, the process waits for the start switch 36 to be turned off. When the start switch 36 is turned off, the process proceeds to step 10, and the sewing start width of the cloth 7 is corrected based on the moving amount Cx of the sewing start point in the X direction. I do. 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 cloth 7 is moved to the left in FIG. 1 by Cx.

Thereafter, at step 11, the button knob control means 30d controls the button knob driving motors 48a, 48b, 48.
By driving the button c, the button knob 12 is lowered to the fabric, and the button is moved in the horizontal direction until the position of the button reaches the coordinates (Cx, Cy).

As described above, according to the present embodiment, the first and second cloth guiding pulse motors 32a, 32 capable of moving the cloth guide 5 in the direction (Y direction) orthogonal to the cloth direction.
b, and the cloth guide control means 30c for controlling the pulse motors 32a and 32b are provided, so that the operation of correcting the position of the cloth guide in step 5 can be automatically performed.

In step 1, the cloth guide 5 is set manually by an operator. However, the first and second cloth guiding pulse motors 32a and 32b and the cloth guide for controlling the pulse motors 32a and 32b are provided. Control means 30
The setting operation of step 1 can be automatically performed using c. In this way, the dough guide 5
The operation of setting a and 5b in the Y direction using the elongated holes can be omitted. Therefore, the position adjustment of the fabric guides 5a and 5b can be performed completely automatically, and
Slots and screws for manually moving the fabric guides 5a and 5b in the Y direction can be omitted.

Further, according to the present embodiment, the cloth conveying device control means 30a for controlling the movement of the cloth conveying device in the cloth feeding direction.
This makes it possible to automatically perform the X-direction correction operation (sewing start width correction operation) in step 10.

Next, another example of the operation of the button attaching device having the above configuration will be described with reference to the flowchart of FIG.
This is because the cloth guides 5a and 5
This is an example of an operation using the previous sewing data to correct the position of b. The button to be sewn has a sewing start hole 9a as shown in FIG. 7 (a), and a sewing start hole 10a 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.
Also, the seam allowance and the sewing start width are not changed.

In step 1, the operator selects a pattern from the operation panel 6. Thereby, the pattern data is read from the RAM 42 by the control means 30 in step 2. In this pattern data, the center of the button is coordinated (0,
0), the hole at the start of sewing is set as coordinates (Cx, Cy) in the case of FIG. 7A, and (D) in the case of FIG. 7B.
(x, Dy). In step 3, the moving amount of the sewing start point is confirmed. That is, the coordinates (D
x, Dy) is confirmed.

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 pattern selected this time, and it is determined whether or not the movement amount data (coordinates) has been changed.
If there is no change, go to step 7.

In step 5, the dough guide control means 30
With c, the cloth guides 5a and 5b are corrected based on the change amount (Dy-Cy) of the movement amount data in the Y direction. That is, the cloth guide control means 30c drives the first and second cloth guiding pulse motors 44a, 44 to move the cloth guides 5a, 5b by (Dy-Cy) in the Y direction. Specifically, the fabric guides 5a and 5b are | D
move by y-Cy |.

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 controlled by the control means 3.
0 in the temporary storage means or the work data area of the RAM 42 as X-direction correction data.

In step 7, since the change amount of the movement amount data in the X direction 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.

In step 8, the fabric is set on the sewing machine table. At this time, the side end of the cloth is set in accordance with the scale of the cloth guide 5 so that the distance from the left end of the cloth to the needle drop point matches the desired sewing start width.

In step 9, the process waits for the start switch 36 to be turned on. When the start switch 36 is turned on, the process proceeds to step 10, in which the cloth pressing control means 30b controls the first and second cloth pressing cylinders (clamps) 40a, 40b. By driving, the dough pressers 28a and 28b are lowered to press the dough 7.

In step 11, the start switch 36
Is turned off, and when turned off, the process proceeds to step 12, where the temporary storage unit of the control unit 30 or the RAM 42
Based on the X direction correction data in the work data area of
The sewing start width of the cloth 7 is corrected. That is, since the X-direction correction data is (Dx-Cx), the cloth guide control unit 30c sets the first and second cloth feed pulse motors 24.
a, 24b is driven to move the cloth 7 in the X direction (Dx-Cx)
Just move. Specifically, the fabric 7 is placed on the right side in FIG.
Dx-Cx |. If the X-direction correction data is 0, the amount of movement of the cloth transport device in step 12 is also 0.

Thereafter, in step 13, the button knob foot control means 30d operates the button knob foot driving motors 48a, 48b, 48.
By driving the button c, the button knob 12 is lowered to the upper side of the cloth and is moved in the horizontal direction.

Although the present invention has been described based on the embodiment shown in the drawings, the present invention is not limited to the embodiment of the box of the present invention, and can be variously modified.

[0052]

According to the present invention, the cloth guide driving means for horizontally moving the cloth guide in the direction perpendicular to the cloth feeding direction, and the cloth guide according to the positional relationship between the center of the button and the button hole at the start of sewing. Since the cloth guide control means for controlling the cloth guide driving means for horizontally moving in the direction orthogonal to the feed direction is provided, it is possible to automatically perform the correction operation of the position of the cloth guide (correction of the sewing allowance). became. Workability has been greatly improved because it is no longer necessary to correct the position of the fabric guide manually by the operator as in the prior art.

Further, according to the present invention, the cloth feeder control means for moving the cloth feeder in the cloth feed direction in accordance with the positional relationship between the button center and the buttonhole at the start of sewing is provided, so that the cloth feed direction can be corrected. Operation (correction of sewing start width) can be performed automatically. Since it is no longer necessary to correct the sewing start width manually by the operator, workability has been greatly improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a button attaching device showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a cloth transport device of the device of FIG.

FIG. 3 is a simplified diagram showing the structure of a fabric guide and a driving unit of the apparatus of FIG.

FIG. 4 is a functional block diagram of control means of the button attaching device of FIG. 1;

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;

FIGS. 7A and 7B are plan views showing buttons having different distances from the center of the button to a sewing start hole, wherein FIG.

FIG. 8 is a perspective view showing a conventional example of a button attaching device with an automatic button supply device.

9A and 9B are diagrams for explaining horizontal movement of a button by a button knob, wherein FIG. 9A shows the position of the button when it is received from the button supply device, and FIG. Indicates the position.

FIG. 10 is a plan view for explaining setting of a dough by a dough guide.

FIG. 11 is a plan view for explaining setting of a dough by a dough guide.

FIG. 12 is a diagram showing the button holes at the start of sewing of buttons having different sizes in correspondence with each other.

[Explanation of symbols]

L: sewing allowance N: needle entry point W: sewing start width
1. Sewing machine 2. Button supply device 3. Sewing machine table 4, 4
a, 4b: cloth transport device 5, 5a, 5b: cloth guide 5M: scale
6 ... operation panel 7 ... cloth 7a ... cloth side 7b ... cloth front end 8, 9, 10 ... button 8a, 9a, 10a ... button hole 8c, 9 at the start of sewing
c, 10c ... button center 12 ... button knob 14 ... sewing needle 15 ... button holder 16a, 16b ... cloth guide drive unit 24a, 24b ... cloth feed pulse motor 28, 28a, 28b ... Dough presser (clamp) 3
0 ... Control means 30a Cloth transport device control means 30b ... Dough press control means 30c ... Dough guide control means 30d ... Button knob foot control means 32a, 32b ... Dough guide pulse motor 3
6. Start switch 40a, 40b ... Dough holding cylinder 42 ... RAM
44 ... ROM 48a ... X motor for button knob foot drive 48b ... Y motor for button knob foot drive 48c Z motor for button knob foot drive

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshiyuki Kaneko 1-2-2, Kokuryo-cho, Chofu-shi, Tokyo F-term in Juke Corporation (reference) 3B150 AA23 BB02 CC02 CC05 CE24 ED01 ED04 ED08 LA36 LA46 LA64 LB02 LB03 NA35 NB11 NC06 QA06 QA07

Claims (2)

[Claims] A sewing machine table; a button supply device for supplying a button to a predetermined position; a button knob for holding a button supplied from the button supply device; A button knob control means which can be lowered and moved horizontally from the predetermined position to the position where the buttonhole at the start of sewing and the needle drop point coincide with each other on the cloth, and are arranged on the sewing machine table along the cloth feeding direction. A dough guide, wherein a dough guide capable of setting a distance from a needle drop point to a dough side by arranging the dough side in contact with the dough guide; and a direction orthogonal to the dough feeding direction with the dough guide. A cloth guide driving means for horizontally moving the cloth guide, and controlling the cloth guide driving means for horizontally moving the cloth guide in a direction orthogonal to the cloth feeding direction according to a positional relationship between a button center and a button hole at the start of sewing. Dough guy Button with device characterized by comprising a control means. 2. A sewing machine table, a button supply device for supplying a button to a predetermined position, a button knob for holding a button supplied from the button supply device, and a button knob for controlling the button knob, A button knob control means which can be lowered and moved horizontally from the predetermined position on the cloth and to a position where the buttonhole at the start of sewing and the needle drop point coincide with each other; a cloth conveying device for conveying the cloth; A dough guide arranged along the cloth feeding direction, a scale indicating a distance from a needle drop point of the sewing machine is formed, and a side of the dough is placed in contact with the dough guide, and a front end of the dough is arranged. A cloth guide that can set the distance from the needle entry point to the cloth front end by adjusting the position to a desired scale, and the cloth transport device in the cloth feeding direction according to the positional relationship between the button center and the button hole at the start of sewing. And a cloth transport device control means for moving to A button attaching device, comprising: