TWI386532B - Sewing sewing machine - Google Patents

Description

Sewing machine with sewing machine

The present invention relates to a sewing machine for sewing stitches used for sewing various buttons, such as men's wear, women's tops, or vests, buckles for inner pockets, buckles for pispockets, and the like. More specifically, it relates to a sewing machine for sewing a sewing machine in which a needle that moves in a vertical direction in conjunction with a main shaft of a sewing machine passes through the respective holes of the button to sew the button on the fabric.

Such a sewing machine for sewing fasteners, as disclosed in Japanese Patent Publication No. Hei 7-49076, basically has a needle plate having a pin hole for moving the needle up and down, and a cloth holder inserted in the fold. The fabric is held in the middle of the fabric; the button holder holds the button in a stitching manner in which the needle passes through the hole; and the movable table drives the button holder to move in a two-dimensional direction orthogonal to each other in a horizontal plane (front and rear, left and right directions) so that the holes of the buttons held by the button holder coincide with the pin holes of the needle plate. The sewing machine for sewing stitches having such a basic configuration is such that when the button is sewn, the cloth holder and the button holder are integrally driven to move in the horizontal plane before and after the horizontal direction by the movable table. The buttons held in the button holder are aligned with the pin holes of the needle plate, thereby sewing the button on the cloth.

However, in the above-mentioned conventional sewing sewing machine, since the relative positional relationship between the button and the cloth is constant when the button is sewn, the left and right hole pitch d1 of the button 50 is sewn to the cloth 51 as shown in FIG. The pitch d2 is equal, and the sewing threads LN and RN located on the left and right sides are in a parallel state, that is, so-called parallel sewing. When such a parallel sewing is performed, if a very soft cloth is used as the object to be sewn, the cloth portion between the right and left sewing threads LN and RN is bulged, or the wrinkles are generated to deteriorate the appearance.

In particular, after the button is sewn, as shown by A to N in the case of the first stitch of FIG. 12, the left and right stitching lines LN and RN between the cloth 51 and the button 50 are alternately inserted. When the winding of the sewing thread LN and RN is reinforced by the winding line BN (the sewing can be mechanically sewn by hand), the tightening force of the winding line BN may be pulled from the left and right as shown in FIG. When the fabric portion between the left and right sewed lines LN and RN is sewn, a large wrinkle x is generated, which causes a problem that the quality of the sewn product is lowered.

In order to eliminate the occurrence of such creases and the like, in order to improve the quality of the sewed product, there has been proposed a sewing machine for sewing according to Japanese Patent No. 2711024, which is provided with a first movable table and a driving button. Having the movements in the horizontal plane orthogonal to each other before, in the left and right direction, so that the holes of the button held by the button holder coincide with the pin holes of the needle plate; and the second movable table drives the cloth holder to Moving in the horizontal plane before and after orthogonal to each other, and in the left and right direction; and independently controlling the moving pitch of the first and second movable tables, when the button is sewn, the button is moved to the left and right by the first movable table. The amount of the pitch of the left and right holes is corresponding, and on the other hand, the cloth is moved to the left and right by the second movable table to a distance of a small distance from the left and right holes of the button, so that the left and right stitches are sewn into a V shape to eliminate the seam wrinkles. When it is produced, it can be used for button sewing with good appearance and good quality.

According to the conventional sewn sewing machine of the Japanese Patent Publication No. 2711024, it is possible to solve the problem of the conventional sewing machine for sewing according to the Japanese Patent Publication No. 7-49076, and the sewing of the button is soft. When the fabric is caused, the fabric portion between the left and right sewing threads LN and RN is bulged, or the wrinkles are generated to cause deterioration of the appearance, and in particular, it is possible to solve the problem that the seam is damaged due to the large seam wrinkles on the fabric when the buckle is sewn. .

Conversely, in order to be configured as described above, it is necessary to provide not only the first movable table (the drive button holder is moved to be orthogonal to each other in the horizontal plane, but also the left and right directions) and the second movable table (the cloth holder is driven to be driven). Moving in the horizontal plane before and after the orthogonal to each other, in the left and right direction), and also having a control function capable of independently controlling the first and second movable tables to make the movements different from each other, thus causing a sewing machine for sewing The overall structure becomes very complicated, and the size is increased to increase the weight, and the cost of the sewing machine cannot be prevented from rising accordingly. Moreover, the vibration or noise when the two movable tables are driven to move are also large, and it is also poor in terms of the working environment.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a simple structure, a small size, a light weight, and a low cost. Even if a soft cloth is used as a sewing object, wrinkles are not generated, and the product can be finished with a high seam product. Sewing buckles are sewn with a sewing machine.

In order to achieve the above object, a sewing machine for sewing fasteners according to the present invention is characterized in that a needle that is moved back and forth in conjunction with a main shaft of a sewing machine passes through the respective holes of the button to sew the button to the fabric, and is characterized in that: The needle passes up and down through the moving pin hole; the cloth holder is inserted between the two-folded fabric to hold the cloth; the button holder holds the button in a stitching manner through which the needle passes; and is movable a button holder for driving the button holder to move in a horizontal plane in a horizontal direction before and after the right and left direction, so that the button holes held by the button holder conform to the pin holes of the needle plate; The movable/unmovable switching mechanism is configured to switch the positioning of the fabric holder to a predetermined position to stop the movement of the cloth holder in the left-right direction when the button is sewn, and to release the positioning of the cloth holder to make the cloth The holder moves in the front, rear, and left and right directions together with the button holder.

According to the invention having the above-described features, when the button is sewn, the cloth holder can be positioned and held at a predetermined position to stop the left and right movement of the cloth holder, and the button holder can be moved to the left and right directions corresponding to the left and right holes. The amount of pitch is stitched in order to the left and right holes, so that the left and right seam threads can be sewn into a V shape, and even if the soft cloth is used for sewing, it will not be caused by seam wrinkles or the like. The appearance is deteriorated, and the sewing can be performed with a high seam product. In addition, it is only necessary to provide a movable/unmovable switching mechanism for the cloth holder in which the cloth holder is switched to the state of being positioned and held at a predetermined position and the state of being released. Therefore, the conventional sewing machine for sewing fasteners disclosed in Patent Document 2 is provided. (In order to achieve the V-shaped seam, the two movable tables for driving the button holder and the fabric holder respectively and the control functions for independently controlling the two movable tables) can make the overall structure very The sewing machine is simple, lightweight, and cost-effective, and has very little vibration or noise, which makes the button work well when sewing.

Moreover, it is also possible to switch between the V-shaped sewing buckle and the conventional parallel sewing buckle, so that the effect of using one sewing machine for the sewing stitch of a plurality of sewing forms can be exhibited, and the V-shaped sewing buckle is used to switch the cloth. The movable/unmovable switching mechanism of the holder is configured to sew the left and right seam threads into a V shape. The conventional parallel stitching is in a state of keeping the movable/unmovable switching mechanism movable, and even if the cloth holder is The button holders are integrally driven to move by the same amount before and after the movement of the movable table in the horizontal plane, so that the holes of the buttons held by the button holder coincide with the pin holes of the needle plate.

The movable/unmovable switching mechanism of the sewing machine for a sewing buckle of the present invention, as described in the second aspect of the patent application, preferably includes: a substantially L-shaped crank connecting rod which is pivoted to wrap the cloth holder The bottom of the arm is slidably slidable in the horizontal axis of the left and right direction, and has engaging claws at both ends thereof. The cloth holder has a swing arm for driving the cloth holder to swing the cloth to keep the cloth a position away from the needle plate to keep the fabric in two folds, and a cloth for holding the two folds to be transported to the needle plate for loading and fixing; the two engaged portions are disposed on the movable table side and On the side of the sewing machine frame, when the crank link is swung around the axis in a state where the cloth holder is positioned at a predetermined position, the engaging claws at both ends can be engaged in an alternative manner; and the actuator The crank link is oscillated and driven so that the engaging claw portions of the two ends are engaged with one of the two engaged portions in an alternative manner. By using the movable/unmovable switching mechanism of such a configuration, it is possible to reduce the size, weight, and cost of the entire structure, and to automatically and continuously perform quality by setting the program at the time of the movable/inactive switching of the actuator. The high button is sewn to achieve an increase in work efficiency.

Moreover, according to the third aspect of the invention, the movable/unmovable switching mechanism is provided on a sewing machine, and the sewing machine is arranged on both sides of the sewing line between the cloth and the button, and the needle is alternately inserted to make a winding. At this time, not only can the button sewing be continuously performed and the winding of the stitching line can be reinforced, but the seam wrinkle of the buckle line can be eliminated, and the seam wrinkles generated by the cloth portion between the left and right seam lines can be eliminated. It is possible to achieve an improvement in the quality of the seam product.

Moreover, in the present invention, the movable/unmovable switching mechanism is not limited to the winding-sewn sewing machine as set forth in claim 2, and may be provided in a sewing sewing machine as described in claim 4 of the patent application. .

Other effects can be clarified from the following examples.

1 is a schematic perspective view of a main part of a sewing machine for sewing stitches according to the present invention, and FIG. 2 is an exploded perspective view of a main part. In FIGS. 1 and 2, a 1-series needle and a sewing machine main shaft provided in the arm portion 2 of the sewing machine ( The illustration is omitted. The 3 series fabric guide is provided with a needle plate 4 having a pin hole for moving the needle 1 up and down through the lower side of the cloth guide 3 (see Figs. 5 and 6). The 5-series button holder is elastically supported from both sides of the peripheral portion of the 4-hole button 6 (refer to Figs. 7 and 10), and can be rotated by the extension and contraction of the cylinder 7 through the connecting rods 8, 9 in a rotatable manner. The button sewing posture and the winding knot sewing posture are configured.

In the 10-series fabric holder, the cloth 11 (see FIG. 5) of the sewing button 6 is folded into two, and inserted into the middle of the two-folded fabric 11 to fix and hold the cloth 11. The cloth holder 10 is fixed to the cloth holder swing arm 18 through the mounting member 19 (which can be extended by the contraction of the cylinder 12, and passes through the connecting rods 13, 14, the horizontal shaft 15, the connecting arm 16, and the connecting shaft 17 around the water.

The shaft 15 is pivotally oscillated, and the horizontal shaft 15 is slidably slidable in the axial direction thereof. The extension and contraction of the cylinder 12 causes the fabric holder 10 to swing about the axis of the horizontal shaft 15, and Switching to position the fabric holder 10 away from the needle plate 4 to hold the fabric 11 in two folds, and transporting the held two-fold fabric 11 to the needle plate 4 to be loaded and fixed to the cloth guide 3 above the location.

In Fig. 1, a 20-series fabric pressing member 20 is abutted against a two-folded fabric 11 from an obliquely upward direction through a cylinder 21 (by the fabric holder 10 being placed on the fabric guide 3) To prevent slack in the cloth 11.

The 22-stage movable table 22 is configured to be movable and movable in the Y-Y direction and the left and right X-X directions before and after being orthogonal to each other in the horizontal plane by the two stepping motors and the confirmation belts (not shown). A pair of right and left cloth holder arms 23 and 24 are fixed to the right and left sides of the movable table 22, and the cloth guides are fixedly coupled to the intermediate portions of the pair of left and right cloth holder arms 23 and 24 through the attachment pieces 25 and 26. The lead member 3 is horizontally fixed to the horizontal shaft 15 between the lower ends of the pair of right and left cloth holder arms 23 and 24.

The 27-series button holder arm is supported by the movable table 22 via the arm coupler 28. Thereby, the button holder arm 27 and the button holder 5 are configured to be integrally movable and movable in the Y-Y direction and the left and right X-X directions through the movable table 22. The 29-series fabric holder adjustment plate is disposed outside the fabric holder arm 23 on the left side, and the lower end portion thereof is mounted to be swingable about the horizontal axis 15. A 30-axis pivot arm member is fixed to the connecting rod 14 and bent to abut against an upper portion of the intermediate portion of the fabric holder adjusting plate 29.

At the base of the cloth holder swing arm 18, a slit groove 31 is formed as shown in Figs. 2 and 3 to 6. In the slit groove 31, a bent portion of a crank link 32 having a substantially L-shape having engaging claw portions 32a and 32b is fitted to both ends thereof, and the shaft is pivoted around the axis of the horizontal shaft 15. Further, another horizontal shaft 33 is horizontally fixed to the left and right pair of fabric holder arms 23 and 24 in parallel with the horizontal shaft 15, and the intermediate portion of the horizontal shaft 33 and the sewing machine frame 34 at the rear thereof are fixed. The left and right pair of collar members 35a and the positioning members 36a are formed when the crank holder 32 is pivoted about the axis of the horizontal shaft 15 while the cloth holder 10 is at a predetermined position with respect to the needle plate 4 The engaged claw portions 32a and 32b at both ends of the crank link 32 are engaged with the engaged portions 35 and 36 in an alternative manner. Further, the cloth holder swing arm 18 is fixedly held by a cylinder (actuator) 38 that moves up and down through the cylinder mounting base 37, and the front end of the operating lever 38a of the cylinder 38 passes through the coupling piece 39 and the coupling pin 40. The crank link 32 is coupled. Further, the engaged portion 36 is inserted in the front-rear direction so as to allow the engaging claw portion 32b engaged therewith to move in the front-rear Y-Y direction.

According to each of the above configurations, the movable/inactive switching mechanism of the cloth holder can be switched such that the crank link 32 is swung about the axis of the horizontal shaft 15 in accordance with the expansion and contraction operation of the air cylinder 38. The engaging claw portion 32b of the crank link 32 is engaged with the engaged portion 36, whereby the cloth holder 10 is positioned and held at a predetermined position as shown in FIGS. 4 and 6 and only the cloth holder 10 is stopped. The state in which the left and right movements are moved, and the other engagement claw portion 32a of the crank link 32 are engaged with the engaged portion 35, whereby the position of the cloth holder 10 is released as shown in FIGS. 3 and 5, and transmitted. The movable table 22 moves the cloth holder 10 together with the button holder 5 in the front-rear and left-right directions.

Next, the sewing operation of the sewing machine for sewing fasteners as described above will be described. First, the 4-hole button 6 is elastically held by the button holder 5 by omitting the operation of the illustrated cylinder or the operation of the manual lever, and then, the button holder 5 is brought into the button sewing posture by the extension of the cylinder 7. And the fabric 11 is folded into two folds and fixed to the fabric holder 10.

Next, the cylinder 12 is extended by stepping on a pedal (not shown) to oscillate the fabric holder 10 about the axis of the horizontal shaft 15, whereby the fabric 11 held by the two holders of the cloth holder 10 is conveyed to the needle board. 4 is fixed to the top of the cloth guide 3 by the loading, and the fabric pressing member 20 is abutted against the two-folded fabric 11 by the extension of the cylinder 21 to prevent the fabric 11 from being slack. At this time, the crank link 32 is swung about the axis of the horizontal shaft 15 by the stretching operation of the air cylinder 38, and the engaging claw portion 32b of one of the crank links 32 is engaged with the engaged portion 36, whereby As shown in FIGS. 4 and 6, the cloth holder 10 is positioned and held at a predetermined position of the sewing machine frame 34, and the cloth holder 10 is stopped from moving in the left and right X-X directions.

In this state, the sewing machine is operated, and the distance between the button holder 5 and the cloth holder 10 to reciprocate the button holder 6 in the front-rear Y-Y direction by the movable table 22 to the pitch d2 of the right rear hole 6Rf, 6Rr. As a result, as shown in FIG. 7, the front right holes 6Rf and 6Rr on the right side of the button 6 are sewn with a button having the number of needles previously set by the sewing thread RN.

Then, the button is sewn to the left front hole 6Lf, 6Lr in the four holes of the button 6, but at this time, the engaging claw portion 32b of the crank link 32 is still stuck as shown in Figs. 4 and 6. The cloth holder 10 is held and held at a predetermined position of the sewing machine frame 34, and the cloth holder 10 is kept in a state of stopping moving in the left and right X-X directions.

In this state, the sewing machine is operated, and the button holder 5 is moved to the left and right X-X directions by the movable table 22 to move the distance between the four holes of the button 6 corresponding to the pitch of the left and right holes d1, that is, the button holder 5 is passed through the movable table 22. The cloth holder 10 reciprocates in the Y-Y direction of the front and rear directions by a distance corresponding to the pitch d2 of the front rear holes 6Lf and 6Lr, whereby the front and rear holes 6Lf, 6Lr of the button 6 are left as shown in FIG. The sewing thread RN is sewn with a button of a predetermined number of needles.

As described above, when the button sewing is performed, the cloth holder 10 is positioned and held at a predetermined position to cause the cloth holder 10 to stop moving in the left and right X-X directions, and in this state, only the button holder 5 is made to face. The left and right X-X direction movements are corresponding to the left and right hole pitches d1, and the two front and rear front and rear holes 6Rf, 6Rr and 6Lf, 6Lr are sequentially stitched, and the right and left seam fastening lines RN and LN can be arranged as shown in the figure. When the soft fabric 11 is used as the object to be sewn, the appearance of the wrinkle or the like is not good, and high-quality button sewing can be performed.

After the above button sewing is completed, even if the cylinder 7 is contracted, the button holder 5 is rotated by the connecting rods 8, 9 to switch into a winding knot sewing posture, and the crank link 32 is wound around the horizontal shaft 15 by the contraction motion of the air cylinder 38. The shaft pivots so that the engagement claw portion 32a of the crank link 32 is engaged with the engaged portion 35, whereby the cloth holder 10 can be switched to be permeable as shown in FIGS. 3 and 5. The movable table 22 can be moved together with the button holder 5 in the front and rear Y-Y directions and the left and right X-X directions.

In this state, the movable table 22 is moved to the winding knot sewing position O of the first stitch shown in FIG. 9 in accordance with the operation signal output from the microcomputer unit (not shown), and then synchronized with the upper and lower reciprocating motion of the needle 1. Through the movable table 22, the button holder 5 and the cloth holder 10 are reciprocated at a predetermined pitch in the front and rear Y-Y directions and the left and right X-X directions, as shown in FIGS. 9A to N. The needles 1 are alternately inserted on both sides of the right and left stitching lines RN and LN between the cloth 11 and the button 6, and the windings for reinforcing the right and left stitching lines RN and LN are wound by the winding line BN.

Then, the right and left sewing threads RN and LN which are reinforced by the winding of the winding wire are sewed to the fabric 11 in a V shape, and the cloth 11 does not exist between the right and left sewing threads RN and LN. The buckle line BN is tightly tightened, and the fabric 11 of the seam of the button 6 is not pulled close to cause the seam to be wrinkled. The button of the high quality can be sewn as shown in FIG.

Further, in the above-described embodiment, the sewing thread RN of the right side holes 6Rf and 6Rr and the sewing line RN of the left side holes 6Lf and 6Lr are sewed to the cloth 11 in a V shape in the four-hole button 6. The movement, but even if the same four-hole button 6 is used, one of the engaging claws 32a of the crank link 32 can be engaged with the engaged portion 35, and the cloth holder 10 is made constant as shown in FIGS. 3 and 5. It is always possible to move the movable table 22 together with the button holder 5 in the front-rear Y-Y direction and the left and right X-X directions, and in this state, the right holes 6Rf and 6Rr and the left holes 6Lf and 6Lr are both performed. The seams are stitched, and the right and left seam fastening lines RN, LN can be parallel stitched as shown in FIG.

Further, when the two-hole button is used as the sewing target, the two holes are fixed in the front-rear direction to be sewn, and as shown in FIGS. 3 and 5, the engaging claw portion 32a of one of the crank links 32 is engaged with the stitched portion 32a. The engaging portion 35 allows the cloth holder 10 to constantly move through the movable table 22 together with the button holder 5 in the front-rear Y-Y direction and the left and right X-X directions, or to engage the other of the crank links 32. The claw portion 32b is engaged with the engaged portion 36 so that the cloth holder 10 and the button holder 5 can be moved together in the front-rear Y-Y direction, regardless of whether any of the above two states is used. The 2-hole button is sewn to the fabric 11.

Further, in the above-described embodiment, it has been described that the sewing machine can be continuously stitched and wound by one sewing machine, but it can also be applied to a sewing machine for sewing. In this case, when the soft fabric is sewn, the sewn wrinkles and the like can be prevented from being produced, and the effect of improving the quality of the sewn product can be obtained.

Furthermore, the movable/unmovable switching mechanism of the cloth holder of the present invention is not limited to the configuration detailed in the above embodiment, and it is only necessary to switch the cloth holder 10 to be positioned and held at a predetermined position to keep the cloth. The state in which the movement of the cloth holder 10 is stopped is stopped, and the position of the cloth holder 10 is released to move the cloth holder 10 together with the button holder 5 in the front-rear direction and the left-right direction, and any configuration may be employed.

1. . . needle

2. . . Sewing machine arm

3. . . Cloth guide

4. . . Needle plate

5. . . Button holder

6, 50. . . Button

7, 12, 21. . . cylinder

8, 9, 13, 14. . . Connecting rod

10. . . Cloth holder

11, 51. . . Cloth

15, 33. . . horizontal axis

16. . . Link arm

18. . . Cloth holder swing arm

19. . . Mounting member

20. . . Fabric press

twenty two. . . Movable table

23, 24. . . Cloth retainer arm

25, 26. . . Mounting piece

27. . . Button retainer arm

28. . . Arm coupler

29. . . Fabric holder adjustment plate

30. . . Axle arm stop

31. . . Notch slot

32. . . Crank connecting rod

32a, 32b. . . Clamping claw

34. . . Sewing machine rack

35, 36. . . Engaged part

35a. . . Collar member

36a. . . Positioning member

38. . . Actuator (cylinder)

38a. . . Action bar

39. . . Link

40. . . Link pin

6Lf, 6Lr. . . Front and rear holes

6Rf, 6Rr. . . Front and rear holes

BN. . . Wrap line

LN, RN. . . Sewing thread

D1. . . Left and right hole pitch

D2. . . Seam pitch

Fig. 1 is a schematic perspective view of a main part of a sewing machine for a sewing buckle according to the present invention.

Figure 2 is a partially exploded perspective view.

Fig. 3 is an enlarged perspective view of an essential part showing a state in which the cloth holder is released and fixed.

Fig. 4 is an enlarged perspective view of an essential part showing a state in which the fixed cloth holder is positioned.

Fig. 5 is an enlarged side elevational view of the essential part corresponding to the state of Fig. 3.

Fig. 6 is an enlarged side elevational view of the essential part corresponding to the state of Fig. 4.

Fig. 7 is a plan view showing the main part of the state in which the button is sewn.

Fig. 8 is a front elevational view showing the main part of the button sewing state.

Fig. 9 is an explanatory view of a sewing position of a winding knot.

Fig. 10 is a perspective view of an essential part showing a state in which the sewing is completed.

Fig. 11 is a front elevational view of the essential part for explaining a sewing state of a button of a conventional sewing machine for sewing.

Fig. 12 is an explanatory view showing a sewing position of the winding knot after the button shown in Fig. 11 is sewn.

Fig. 13 is a front elevational view showing the main part of the state shown in Fig. 12 after completion of the winding knot sewing.

32. . . Crank connecting rod

32a, 32b. . . Clamping claw

34. . . Sewing machine rack

35, 36. . . Engaged part

35a. . . Collar member

36a. . . Positioning member

38. . . Actuator (cylinder)

Claims (4)

A sewing machine for sewing a sewing machine, wherein a needle that moves up and down in conjunction with a spindle of a sewing machine passes through the holes of the button to sew the button to the cloth, and is characterized in that: a needle plate having a needle for moving the needle up and down a pinhole; a fabric holder inserted in the middle of the folded fabric to hold the fabric; a button holder that holds the button in a stitching manner through the hole; and a movable table that drives the button to hold Having the movements in the horizontal plane orthogonal to each other before and after the left and right direction, so that the holes of the buttons held by the button holder conform to the pin holes of the needle plate; and the movable/unmovable switching mechanism of the cloth holder is provided. When the button is sewn, it is switched such that the fabric holder is positioned and held at a predetermined position to stop the state in which the cloth holder moves in the left-right direction, and the positioning of the cloth holder is released to make the cloth holder together with the button holder a state of moving in the front, back, and left and right directions; the movable/unmovable switching mechanism includes: a substantially L-shaped crank connecting rod, which is supported by the shaft to be able to wrap around the fabric The bottom of the boom is rotatably held by a horizontal axis that is slidable in the left-right direction, and has engaging claws at both ends thereof. The cloth holder has a swing arm for driving the cloth holder to swing it. The fabric holder is disposed away from the needle plate to maintain the position of the fabric in two folds, and the cloth for holding the two folds is transported to the needle plate for loading and fixing; the two engaged portions are disposed on the movable table The side and the side of the sewing machine frame, the engaging claws at both ends when the crank link is swung around the axis in a state where the cloth holder is positioned at a predetermined position with respect to the needle plate The locking may be performed in an alternative manner; and the actuator drives the crank link to swing so that the engaging claws of the two ends are engaged with one of the two engaged portions in an alternative manner. The sewing machine for sewing according to the first aspect of the invention, wherein the movable/unmovable switching mechanism is provided on a sewing machine, and the sewing machine is on both sides of a sewing line between the cloth and the button, and the needle is alternately inserted to make a winding. The sewing machine for sewing according to the first aspect of the invention, wherein the movable/unmovable switching mechanism is provided in a sewing machine for sewing. The sewing machine for a sewing machine according to the first aspect of the invention, wherein the actuator presets a movable/unmoved switching timing program of the cloth holder so that the crank link is engaged with the two in a different manner. One of the fits.