TWI502111B - The button holder of the sewing machine - Google Patents

Description

Button holder device for sewing machine

The present invention relates to a sewing machine for sewing a button of a flat woven button or the like to a cloth such as a men's/women's clothing, and more particularly to a button holder device for a sewing machine, comprising: a pair of left and right button holders are arranged on the fixed support table and supported to be linearly slidable in the same direction; a pair of button holding members are mounted on the front and rear portions of the pair of left and right button holders at the button The diametrical direction is opposite to each other; and the sliding drive mechanism is configured such that the pair of left and right buttons are held in the opposite directions to each other and are driven to rotate back and forth at the same speed to switch between the pair of button holding members and the diametrical direction The state of the button is held on both sides and the state of the button is released to release the button.

Among the flat woven buttons used in the stitching button of the sewing machine, the buttons of the range of 8 to 14 mm in diameter (hereinafter referred to as small buttons) and the buttons of the range of 15 to 24 mm in diameter are generally included. It is a middle button, and it is a button of a button having a diameter of 25 to 32 mm (hereinafter referred to as a large button) having different diameters. Moreover, the most important function of the button holder device is that any one of a plurality of buttons including large, medium and small buttons can be used as a suture object, and can be firmly secured from both sides in the diameter direction by a pair of button holding members. It is surely and stably held to prevent the button from falling off or tilting due to vibration or impact of the sewing machine, and to obtain a stitch with a good appearance and good appearance.

The button holder device of the sewing machine which is responsible for the above-mentioned important functions is basically constructed as shown in Figs. 6 and 7 . That is, the fixed support stand 30 is fixed by the button holder holder 30a having the upright plate portions on the left and right sides and being opened upward and the front and rear sides, and the opening to close the button holder table 30a. A mounting table 31 to which a swing lever to be described later is fixed to a left-right central position of the bottom surface of the button holder 30a on the left and right side of the upper and lower side of the upper portion On both sides, a pair of left and right button holders 32L, 32R which are substantially L-shaped and slidable in a straight line in the front-rear direction are supported. Here, the pair of button holders 321a, 32ra of the pair of button holders 32L, 32R are attached to the pair of button holding members 35L, 35R in a state in which the button B is opposed to the diameter direction. The pair of button holding members 35L, 35R are bent in a circular arc shape to partially contact the pair of button holding members 35L by the stopper screws 36L, 36R, and the lower two peripheral portions of the 35R retaining members are spaced apart from each other. The laminated body of the 331,33r and the button supporting plates 341 and 34r is fixed to the front end portions 321a and 32ra of the pair of left and right button holders 32L and 32R.

On the outer surface of the sliding cover 30b of the fixed support base 30, the cylinder 38 as an actuator that is linearly driven in a sliding direction by the left and right pair of button holders 32L, 32R is fixedly supported by the cylinder mounting table 37. The cylinder portion is provided in the cylinder portion of the cylinder 38 through the pipe body 41, the joint member 42, the universal joint 43, and the like, and is driven by the locking snail before being telescopically driven to the front end of the movable rod 38a in the sliding direction. The cap 44 is fixed with a cylinder guide 45. Moreover, at the end portion of the mounting table 31, the sleeve collar 39 is inserted and held in a direction rotatable about the axis thereof, and the sleeve collar 39 is fitted and held at both ends to support the axis thereof. The swing lever 40 that swings back and forth in the opposite direction from each other, and the pins 40a, 40b projecting downward from both end portions of the swing lever 40 are engaged with the concave shape formed on the intermediate portion of the pair of right and left button holders 32L, 32R The engaging portions 32lb and 32rb are inserted into the button holders 32R on the right side, and the roller pins 46 that integrally connect the button holder 32R and the cylinder guide 45 are integrally inserted.

In the button holder device of the sewing machine configured as described above, when the cylinder 38 is telescopically driven, the telescopic driving force is transmitted to the right button holder 32R through the roller pin 46, and the right button holder 32R is driven forward and backward. The sliding movement of the button holder 32R on the right side is transmitted through the pin 40b, the swinging lever 40, and the pin 40a is transmitted to the button holder 32L on the left side, so that the left button holder 32L is directed to the button on the right side. The holder 32R is driven in the same direction and driven at the same speed to rotate back and forth. Thereby, the pair of button holding members 35L, 35R are close to each other, and are switched to a state in which the button B is held from both sides in the diameter direction and are separated from each other to release the state in which the button B is held.

In the button holder device having the above-described basic configuration and operating as described above, the parts list "ILLUSTRATED SPARE PARTS LIST FOR ELECTRONIC CONTROLLED POSTED BUTTON SEWER" issued by Daiwa Sewing Machine Manufacturing Co., Ltd. on November 1, 2004 is used in the past. MODELS NB3000 NB3100 No.2", p.8~9, which corresponds to the type of buttons of different diameters such as large, medium and small buttons, is prepared in advance with a plurality of button holders, which are associated with the cylinder 38. The telescopic drive of the movement is performed by a pair of button holders 32L, 32R and a diameter corresponding to the diameter of the button B having different lengths and different lengths, and the bending portion of the circular arc portion at the outer peripheral surface of the button is different. One of the plurality of types is constituted by the button holding members 35L and 35R, and the button holding member 32L, 32R and the button holding members 35L, 35R are replaced by the pair of button holders 32L, 32R, depending on the type of the stitching button B. use.

However, according to the above-described button holder device, since the button holder holders 32L, 32R and the button holding members 35L, 35R are required to be combined with the number of types of buttons having different diameters, the components of the device are formed. The number of pieces has become very large, so that not only the cost is correspondingly increased, but when a set of button holders is installed for use, most parts of the storage management in the non-installed and non-used state are quite complicated, and the parts are often lost or lost. Falling on the ground and hurting.

Moreover, each time the button to be sewn is changed, not only the previously installed button holder group but also the button holder group to be used next is required, and the replacement work is time consuming and complicated. Therefore, when a plurality of types of buttons having different diameters are sewn to a piece of clothing or the like, it takes a lot of steps to replace the button holder group, and there is a problem that the overall efficiency of the sewing operation cannot be reduced.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a holder capable of using one type of button holder for a plurality of types of buttons, which can reduce the cost and release the parts due to the reduction in the number of parts. In addition, the button holder device of the sewing machine that can be held in a stable and highly stable manner without falling off or tilting, regardless of the type of button used as the object to be sewn.

In order to achieve the above object, the button holder device of the sewing machine of the present invention comprises: a pair of left and right button holders, which are arranged on the fixed support table and supported to be linearly slidable in the same direction; a pair of buttons The holding member is mounted on the front end portions of the pair of left and right button holders and opposed to each other in the diameter direction of the button; and the sliding driving mechanism is configured to hold the pair of left and right button holders in the opposite directions and drive at the same speed Sliding back and forth to switch between the state in which the pair of button holding members are close to each other, and the state in which the buttons are held from both sides in the diametrical direction and the state in which the buttons are released from each other, wherein the pair of button holding members are respectively connected A shaft-shaped member is provided which can adjust the position of the front end portion of the pair of button holders in the same direction as the sliding direction of the button holders, and the plurality of types of buttons having different peripheral surfaces and diameters of the shaft members At a plurality of axial directions corresponding to the button diameters of at least two types, a pair of buttons are held and held by the left and right buttons to maintain The locking and fixing spacer portion of the screw end of the front end portion is configured to adjust the position of the shaft member of the pair of button holding members in the direction, and the locking portion is locked and fixed with the spacer portion Under the driving of a certain stroke of the driving mechanism, a pair of button holding members hold and release the holding of at least two types of buttons.

According to the button holder device of the sewing machine of the present invention having the above-described features, the position of each of the shaft members of the pair of button holding members can be adjusted in accordance with the type of the button to be sewn, and the combination is formed here. The spacer portion of the equiaxed member locks the fixing screw, and only one such simple operation can be used, and a pair of button holders and a pair of button holding members can be used as a plurality of types. The button holder device. Therefore, the number of components constituting the device can be greatly reduced, and not only a significant cost reduction can be achieved, but also since there are no components that are not installed or used, the steps of storing and managing parts can be saved, and the missing parts can be completely eliminated. Or the case of broken parts. Further, since it is not necessary to perform a large and complicated operation when the button holder is replaced as in the conventional one, even if a plurality of types of buttons having different diameters are sewn to one piece of cloth, the overall efficiency of the sewing operation can be improved.

Further, it is possible to surely change the sliding stroke of the pair of left and right button holders to be correspondingly matched only by the locking and fixing spacers that are formed by the locking members formed in the shaft members of the pair of button holding members. Since the button type (diameter) is used as the sewing target, the button of the sewing object can be held and held stably and stably to avoid falling off due to vibration or impact of the sewing machine. Play the effect of a seam that can be used for a good appearance.

In the button holder device of the sewing machine of the present invention, the spacer portion for locking and fixing formed on the outer peripheral surface of the shaft member is preferably a V-shaped or U-shaped cross section as described in the second item of the patent application. Groove or hole. At this time, the button holding member corresponding to the button type can be fixed and held in a certain position by the groove or the hole engaging the stopper, so that the button can be surely and without falling or tilting. Under a certain posture, the appearance is well stitched to the fabric.

Moreover, in the button holder device of the sewing machine of the present invention, the sliding drive mechanism is preferably as described in claim 3 of the patent application, and is an actuator driven by a certain range of motion and expansion. The telescopic drive of a certain range of movements is constituted by a swing lever that swings back and forth between the pair of button holders at the center portion thereof, and the left and right pair of button holders and the swing lever The reciprocating swings are oscillated in the opposite direction to each other and slide back and forth at the same speed. As described above, as a mechanism for driving the left and right pair of button holders to be slidable, it is possible to reciprocate by using an actuator that is telescopically driven by a certain range and a telescopic drive with a certain stroke of the actuator. The mechanism constituted by the swing lever can easily configure the entire button holder device to be small.

Further, in the button holder device of the sewing machine of the present invention, it is preferable that the button holding member is attached to the back of the button holding member and the button is held when the button having a small diameter is used as the object to be sewn as described in the fourth item of the patent application. The shaft-shaped member portion having the front end portion is provided with a sleeve-like space-retaining member detachably interposed therebetween. In this case, the position of the gauge portion in which the type of the button to be sewn is changed is aligned with the position of the stopper, and the operation can be performed more easily and easily.

Hereinafter, embodiments of the present invention will be described based on the drawings.

1 is a schematic overall perspective view of a sewing machine according to the present invention, the sewing machine 1 is provided with a needle 3 that reciprocates up and down at a certain position through a lifting drive mechanism provided in the sewing machine arm 2, and is placed above and below the needle 3. In front of the moving path, a cloth holder 4 for placing the cloth (not shown) of the button B (shown in FIG. 2 and FIG. 3) to be placed on the upper and lower movement paths of the needle 3 in a two-fold state is provided. The fabric guide member 5 that is disposed to move in the horizontal direction in the horizontal direction along the horizontal plane, the button holder device 6 that holds the button B from both sides in the diameter direction, and the fabric pressing member that presses the fabric from the obliquely upward direction 25, and the scraper 7 or the like which can be protruded or retracted by moving the upper and lower movement paths of the aforementioned needle 3 and scraping the threaded portion after the tangential step to the upper and lower sides after the sewing step. Since each of these components is well known, the detailed description thereof will be omitted.

The button holder device 6 having the sewing machine 1 having the basic configuration described above is configured as shown in Figs. 2 to 4 . That is, the fixed support table 8 (fixed by the button holder 8a having the upright plate portions on the left and right sides and opening upward and the front and rear sides, and the opening to close the button holder 8a upward) A mounting base 9 to which a swing lever to be described later is fixed is disposed at a left-right central position on the bottom surface of the bottom plate of the button holder 8a on the left and right sides of the button holding portion 8a. On the left and right sides of the mounting table 9, a pair of left and right button holders 10L, 10R which are supported by a substantially L-shape which is slidable in a straight line in the front-rear direction and which are different in length from each other are supported.

The curved distal end portions 101a and 10ra of the pair of button holders 10L and 10R are attached to the button holding members 11L and 11R having a substantially V-shaped plan view in a state in which the button B is opposed to the diameter direction.

On the outer surface of the sliding cover 8b of the fixed support base 8, the cylinder 13 as an actuator that is linearly driven in a sliding direction of the pair of right and left button holders 10L, 10R is fixedly supported by the cylinder mounting base 12 In the cylinder portion of the cylinder portion of the cylinder 13, a venting member such as a pipe body, a joint member, a universal joint or the like as a structure for supplying and discharging the exhaust body is connected. Since these ventilation members are the same as those of the conventional device shown in Figs. 6 and 7, the illustration is omitted. The front end portion of the movable rod 13a that is telescopically driven in the sliding direction by the cylinder 13 is fixed to the cylinder guide 15 via the lock nut 14.

Further, the sleeve collar 16 that is rotatably inserted and held at the end portion of the mounting table 9 is fitted and held, and both end portions can be reciprocated in opposite directions with the axis of the sleeve collar 16 as a fulcrum. The swinging rods 17 that are swung, and the pins 18a, 18b projecting downward from the vicinity of both end portions of the swinging lever 17 are engaged with the concave engaging portions formed on the intermediate portions of the pair of right and left button holders 10L, 10R 101b, 10rb, and the button holder 10R inserted on the right side has a roller pin 19 that integrally connects the button holder 10R and the cylinder guide 15 to be integrally movable, and further, expands and contracts with the expansion and contraction of the cylinder 13 The driving force is transmitted to the button holder 10R on the right side through the roller pin 19, so that the right button holder 10R is driven back and forth to slide back and forth, and the driving force of the right button holder 10R is transmitted through the pin 18b, the swing lever 17, The pin 18a is transmitted to the button holder 10L on the left side, so that the left button holder 10L is driven by the same amount in the opposite direction to the right button holder 10R and is driven to rotate back and forth at the same speed. Thereby, the pair of button holding members 11L, 11R are close to each other, and are switched to a state in which the button B is held from both sides in the diameter direction thereof and are separated from each other to release the state in which the button B is held.

Then, the shaft members 20L and 20R of the same length are respectively connected to the center portions on the opposite sides of the side where the pair of button holding members 11L and 11R abut against the outer peripheral surface of the button B. The shaft members 20L, 20R are inserted and held in the front end portions 101, 10ra formed in the pair of right and left button holders 10L, 10R so as to be positionally adjustable in the sliding direction of each of the button holders 10L, 10R. The holes 101c, 10rc, and the locking and fixing gauges formed by the V-shaped grooves of the cross section are formed in three of the outer circumferential surfaces of the shaft members 20L, 20R corresponding to the diameters of the three large, medium and small buttons. The portions 22L and 22R are screw-shaped members 21L that are perpendicular to the axis of the shaft members 20L and 20R and are screwed and held by the pair of right and left button holders 10L, 10R, the front end portions 101a, 10ra, and the like. The front end of the 21R is embedded to prevent the rotation of the shaft members 20L, 20R.

In the button holder device 6 configured as described above, when the button B to be sewn is a large button (the diameter is in the range of 25 to 32 mm), as shown in FIG. 5(a), the pair of button holding members 11L are slidably adjusted. The shaft members 20L, 20R of the 11R are positioned until the suture roots enter the holes 101c, 10rc, and the screw fittings 21L, 21R are locked and fixed with the gauge portions 22L, 22R, thereby making the cylinder 13 When the drive is reciprocated by a certain stroke, the left and right pair of button holders 10L and 10R are driven to rotate back and forth in the opposite directions and at the same speed, whereby the pair of button holding members 11L, 11R are in the diameter direction thereof. The two sides hold the big button B or release the restraint.

Further, when the button B to be sewn is a middle button (the diameter is in the range of 15 to 24 mm), as shown in FIG. 5(b), the positions of the slide-adjusting shaft members 20L, 20R are such that a pair of button holding members are provided. 11L, 11R are relatively close to the pair of right and left button holders 10L, 10R, and the screw fittings 21L, 21R are locked and fixed together with the other spacer portions 22L, 22R, thereby making the cylinder 13 reciprocate at a certain distance. When driving, the pair of right and left button holders 10L, 10R are driven in the same direction and opposite to each other in the opposite direction, and the pair of button holding members 11L, 11R hold the middle button from both sides in the diameter direction thereof. B or act to release the restraint.

Further, when the button B to be sewn is a small button (the diameter is in the range of 8 to 14 mm), as shown in FIG. 5(c), the positions of the slide-adjusting shaft members 20L, 20R are such that a pair of button holding members are provided. 11L, 11R are relatively close to the left and right pair of button holders 10L, 10R, and the screw fittings 21L, 21R are locked and fixed together with the other spacer portions 22L, 22R, thereby making the cylinder 13 When a certain range of reciprocating driving is performed, the left and right pair of button holders 10L and 10R are driven in the same direction and in the opposite direction to drive back and forth, whereby the pair of button holding members 11L, 11R are two from the diameter direction thereof. The side is held in a small button B or released.

As described above, the position (diameter) of the button B to be sewn is changed, and the positions of the shaft members 20L and 20R of the pair of button holding members 11L and 11R are adjusted, and the shaft members 20L are formed in cooperation. 20R's spacer locking and locking screws 21L, 21R, only for such a very simple operation, a pair of button holders 10L, 10R and a pair of button holding members 11L, 11R can be used to hold a group of buttons The group also serves as a button holder device for three types of large, medium and small diameters. As a result, the number of components constituting the button holder device 6 can be greatly reduced, and not only a significant cost reduction but also a non-installed or non-used component can be achieved, so that the steps of storing and managing components can be saved. Completely eliminate the loss of missing parts or parts. Further, since it is not necessary to carry out the large and complicated work required for the replacement of the button holder, for example, even if a plurality of types of buttons having different diameters are sewn to one piece of cloth, the overall efficiency of the sewing operation can be improved.

Further, the locking and fixing spacers 22L, 22R formed by the locking and fixing spacer portions 22L, 22R formed in the respective shaft-shaped members 20L, 20R of the pair of button holding members 11L, 11R can securely lock the left and right ones. The sliding stroke of the button holder 10L, 10R is changed to the stroke corresponding to the type B (diameter) of the button B, and the pair of button holding members 11L, 11R can be constantly held in a certain posture without causing the shaft member 20L The tilt of the 20R is generated by the rotation of the 20R. Therefore, regardless of the type of button used as the object to be sewn, the button of the stitched object can be held and held securely and stably to avoid falling off or opposing the cloth due to vibration or impact of the sewing machine. It is inclined, so that it can exert the effect of being able to consistently perform a sewing buckle with a good appearance.

Further, when the button B is the object to be sewn as shown in FIG. 5(b) and the small button C as shown in FIG. 5(c) is the object to be sewn, the back of the button holding members 11L, 11R and the button are held. The 10L, 10R front end portions 101a, 10ra are exposed between one of the shaft members 20L, 20R, so it is preferable to expose the shaft member portion so as to have a sleeve shape as shown in Figs. 5(b) and 5(c). The spacer members 23L, 23R are interposed therebetween. When the spacer members 23L and 23R are interposed therebetween, the spacer portions 22L and 22R which are changed in the type of the button to be sewn are aligned with the positions of the screwers 21L and 21R, and can be more easily and easily performed. .

In the above-described embodiment, the spacer portions 22L and 22R formed on the outer circumferential surfaces of the shaft members 20L and 20R are formed with grooves having a V-shaped cross section in which the ends of the screws 21L and 21R are fitted. However, it is also possible to form a U-shaped groove in the cross section, and it is also possible to form a hole through which the shaft-like members 20L, 20R penetrate in the radial direction instead of the groove.

Further, in the above-described embodiment, a cylinder is used as the actuator constituting the slide drive mechanism, but a motor may be used, and the motor may be reversed, and the pinion gear may be engaged with the diametrical direction of the pinion gear. One of the pair of racks causes the left and right pair of button holders 10L, 10R to drive in the same direction and in the opposite direction.

Furthermore, the button holder device of the present invention is not limited to a sewing machine, and can also be applied to a winding knot sewing machine.

1. . . Sewing machine

2. . . Sewing arm

3. . . needle

4. . . Cloth holder

5. . . Cloth guide

6. . . Button holder device

7. . . Scrapper

8. . . Fixed support

8a. . . Button holder

8b. . . Sliding cover

9. . . Mounting table

10L, 10R. . . Button holder

101a, 10ra. . . Front end

101b, 10rb. . . Concave snap

101c, 10rc. . . hole

11L, 11R. . . Button holding member

12. . . Cylinder mounting table

13. . . cylinder

13a. . . Movable rod

14. . . Locking nut

15. . . Cylinder guide

16. . . Casing collar

17. . . Swing rod

18a, 18b. . . pin

19. . . Roller pin

20L, 20R. . . Shaft member

21L, 21R. . . Screw fitting

22L, 22R. . . Gauge

23L, 23R. . . Spacer retention member

25. . . Fabric press

30. . . Fixed support

30a. . . Button holder

30b. . . Sliding cover

31. . . Mounting table

32L, 32R. . . Button holder

321a, 32ra. . . Front end

321b, 32rb. . . Concave snap

331,33r. . . Button holder spacer

341,34r. . . Button plate

35L, 35R. . . Button holding member

36L, 36R. . . Stop screw

37. . . Cylinder mounting table

38. . . cylinder

38a. . . Movable rod

39. . . Casing collar

40. . . Swing rod

40a, 40b. . . pin

41. . . Tube body

42. . . Joint piece

43. . . Universal joint

44. . . Locking nut

45. . . Cylinder guide

46. . . Roller pin

B‧‧‧ button

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic overall perspective view of a sewing machine of the present invention.

Figure 2 is a side elevational view of the button holder device of the main portion of the present invention.

Figure 3 is a plan view of the button holder device.

Figure 4 is an enlarged plan view of the main part of the button holder device.

Fig. 5 is an enlarged plan view showing the main part of the button holder device when the buttons of the three types of large, medium and small buttons are used as the object to be sewn.

Fig. 6 is an enlarged exploded perspective view showing the main part of the button holder device of the conventional sewing machine.

Fig. 7 is an enlarged perspective view showing the main part of the button holder of the conventional sewing machine.

1. . . Sewing machine

2. . . Sewing arm

3. . . needle

4. . . Cloth holder

5. . . Cloth guide

6. . . Button holder device

7. . . Scrapper

8. . . Fixed support

8a. . . Button holder

8b. . . Sliding cover

9. . . Mounting table

10L, 10R. . . Button holder

101a, 10ra. . . Front end

101b, 10rb. . . Concave snap

101c, 10rc. . . hole

11L, 11R. . . Button holding member

12. . . Cylinder mounting table

13. . . cylinder

13a. . . Movable rod

14. . . Locking nut

15. . . Cylinder guide

16. . . Casing collar

17. . . Swing rod

18a, 18b. . . pin

19. . . Roller pin

20L, 20R. . . Shaft member

21L, 21R. . . Screw fitting

22L, 22R. . . Gauge

23L, 23R. . . Spacer retention member

25. . . Fabric press

Claims (4)

A button holder device for sewing a sewing machine, comprising: a pair of right and left button holders, which are arranged on a fixed support table and supported to be linearly slidable in the same direction; a pair of button holding members are installed thereon a pair of left and right button holders having a front end portion and facing in a diameter direction of the button; and a sliding drive mechanism for causing the pair of left and right button holders to rotate in the opposite directions to each other and to drive back and forth at the same speed to switch to a state in which the button holding members are close to each other and the buttons are held from both sides in the diameter direction and are separated from each other to release the button, wherein the pair of button holding members are respectively provided with a pair of button holders a shaft-shaped member whose position is adjusted in the same direction as the sliding direction of the button holders, and an axis corresponding to at least two types of button diameters among a plurality of types of buttons having different peripheral surfaces and diameters of the shaft members At a plurality of directions, a screwing device that is screwed and held at a front end portion of the pair of left and right button holders is formed and fixed The spacer portion is configured to adjust the position of the shaft member of the pair of button holding members in the direction, and cooperate with the spacer portion to lock the screw, so that the driving of the driving mechanism can be driven back and forth Next, the pair of button holding members hold and release the holding of at least two types of buttons. The button holder device of the sewing machine according to the first aspect of the invention, wherein the locking portion for locking the outer peripheral surface of the shaft member is a V-shaped or U-shaped groove or hole. The button holder device of the sewing machine of claim 1 or 2, wherein the sliding drive mechanism is driven by a telescopic movement The actuator and the oscillating lever which are pivotally driven with the center portion between the pair of left and right button holders as a fulcrum with a certain movement of the actuator, and the both ends thereof swing back and forth in opposite directions to each other, left and right The button holder is slid in the same direction and opposite to each other in the opposite direction to the swinging motion of the swinging lever. The button holder device of the sewing machine according to claim 1 or 2, wherein the button between the back of the button holding member and the front end portion of the button holder is exposed when the button having a small diameter is used as the object to be sewn The member portion is provided with a sleeve-like spacer member detachably interposed therebetween.