JPH057673A - Button holding device for sewing machine for stitching button - Google Patents

Abstract

PURPOSE:To unnecessitate the replacement of parts even when the size of a button changes and to prevent a seam from opening by providing a receiver moving only in the up and down directions, on the lower side of the button nipping device table, and a button nipping crank moving a receiver and a button nipping device table in the opposite directions on the upper part of the button nipping device table. CONSTITUTION:The front part of a button nipping crank 5 is raised and the front part of a button nipping device table 23 is lifted up through the engagement of a roller 62 f a lifting rod 61. The rear part of the receiver 15 is lifted up through a rod 64. In this time, a button receiving member 16 is down and button holders 31 and 35 are lifted up, resulting in spacing out between the member 16 and the holders 31 and 35. Then, a cloth is put on the member 16, the shank of a shank button 40 is inserted between the holder 31 and 35, and the button 40 is fixed by a button pressing spring 54. Then the tip of a stand 23 is down by the operation of a crank 5, the end of the receiver 15 is lifted up to hold the cloth by a cloth pressing member 42 and the member 16. When a sewing is started, a feeding base 21 rocks right and left and also the stand 23 rocks right and left together with the button 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a button holding device used for a button sewing machine dedicated to button sewing for sewing buttons to cloth such as clothing.

[0002]

2. Description of the Related Art In a conventional sewing machine with buttons, a feed table is provided on a bed of the sewing machine, which swings to the left and right in synchronization with the sewing of the sewing machine. Is mounted so that it can be swung up and down, the button clamp mounting base is fixed to the tip of the button clamping device base, a pair of button clamps is provided at the distal end of this mounting base, and the feed plate is fixed to the tip of the feed base. It is a thing.

To attach a flat button in this conventional apparatus, first, the button-pinch mounting crank is raised by a button-pinch lifting crank, a cloth is placed on the feed plate, and the flat button is placed horizontally on the button-pinch attachment base. When the button is pressed down and the button is pressed against the cloth by the button clamp at the tip thereof to start sewing, the feed plate and the button clamp swing together with the feed base to sew the button to the cloth.

Further, in the case of sewing a shank button, a shank button mount dedicated to the shank button is fixed to the front end of the button holding device base, and the feed plate at the tip of the feed base is also used for the shank button. Fix the button receiving auxiliary plate.

To attach the shank button in this conventional device, the button-pinch mounting base is raised by the button-pinch lifting crank, the button is turned sideways, and the button shank is placed on the button receiving auxiliary plate on the feed plate and sewn.

[0006]

In the above-mentioned conventional apparatus, in both flat button and shank button attachment, the feed plate for supporting the cloth and the button pinching mount for holding the button swing together, so that the cloth is shaken. There is a problem that the width becomes large and the seams become loose and the sewing finish is not beautiful.

Further, in the case of the shank button, since the button receiving auxiliary plate has to be replaced according to the size of the button, it is troublesome to take in and out the cloth, and it is necessary to prepare a plurality of auxiliary plates having different heights. Therefore, there was a problem that the cost was high.

An object of the present invention is to solve the problems of the conventional device as described above, and even if the size of the button is changed, it is not necessary to replace the parts, and the button of the sewing machine with a button does not cause looseness of the seam. A holding device is provided.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a feed table which swings to the left and right in conjunction with the sewing of a sewing machine with buttons on a bed, and a button pinching device above the bed. The rear end of the table is swingably mounted in the vertical direction, and a pedestal that swings only in the vertical direction is provided on the bed below the button holding device base. On the upper side, provided is a button holding crank for swinging the receiving base and the button holding device base in opposite directions, and a button receiving member having a needle drop notch is fixed to the tip of the receiving base,
Provided is a button holding device for a button sewing machine, in which upper and lower button holders located above and below a button shank and button holding springs for pressing a button on the upper and lower button holders are provided at the tip of the button pinching device base.

[0010]

Since the present invention has the above-described structure, the condition that the button holding device base is first raised by the button holding crank and the receiving base is lowered so that the space between the button receiving member and the pair of upper and lower button holders is wide open. Then, the cloth is placed on the button receiving member, the shank of the laid shank button is inserted between the upper and lower button holders and placed on the cloth, and then the button is pressed against the upper and lower button holders by the button pressing spring.

Next, the button clamp device base is lowered by the action of the button clamp lifting crank, the pedestal is raised to hold the button and the cloth, and when sewing is started, only the button clamp device base shakes to the left and right together with the button holder. Move and sew the shank to the cloth.

When the button-holding crank is finished and the crank for raising the button is raised, each part returns to the position before sewing, so the cloth to which the button is sewn is removed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in the drawings, 1 is an arm fixed on a bed 2 of a known sewing machine with buttons, and inside the arm 1, a needle bar crank 4 and a button pinching crank 5 are provided by a horizontal shaft 3. It is mounted so that it can swing freely.

The needle bar crank 4 is swung up and down by the same needle bar crank rod mechanism as a well-known sewing machine with buttons (not shown), that is, a rod that is lifted by a spherical eccentric fixed to a pulley shaft provided in the bed 2. The needle bar 6 connected to the tip of the crank 5 is moved up and down.

The above-mentioned button pinching crank 5 is also driven by a known mechanism. That is, as shown in FIG.
A triangular lever 7 is swingably mounted in the inside by a horizontal shaft 9, and a sleeve fitted to a set screw that connects the rear end of the crank 5 and the upper end of the suspension link 10 is attached to the cam hole 1 of the triangular lever 7.
1 and hook the rear part of the crank 5 with a spring 8. Then, the suspension link 10 is moved up and down by the drive mechanism in the bed 2 to swing the crank 5 up and down.

Reference numeral 12 shown in FIG. 2 and the like denotes a needle plate fixed to the bed 2. Between the pair of bearings 13 near the rear portion of the needle plate 12, a horizontal shaft 14 allows the middle portion of the pedestal 15 to swing freely. It is supported and the button receiving member 16 is fixed to the tip thereof.

As shown in FIG. 5, the member 16 has a needle drop notch 1 at its tip, which faces the needle hole 18 of the needle plate 12.
7 is provided, a groove 19 penetrating vertically from the rear end is provided up to near the front end, and the set screw 20 inserted in the groove 19 is provided on the pedestal 1
It is adjustable and fixed by screwing it into the screw hole of No. 5.
Therefore, when the set screw 20 is loosened, the member 16 can be moved left and right along the guide.

Reference numeral 21 denotes a feed table provided on the bed 2, which swings left and right around a fulcrum by a known mechanism (not shown). The fulcrum can be moved back and forth by a known mechanism, that is, in the left and right directions of FIGS. 1 and 2, and the swing width can be changed by moving the fulcrum.

Reference numeral 23 is a button holding device base, and legs 24 are provided on the left and right of the rear end thereof, and the legs 24 are attached to the left and right bearings 25 on the intermediate portion of the feed base 21 by means of shafts 26. The shaft 23 can swing up and down with the shaft 26 as a fulcrum.

An inverted L-shaped shank button mounting base 27 is integrally fixed to the tip of the button clamping device base 23 with bolts, and a vertical shallow guide groove 29 provided on the front surface of the mounting base 27.
The vertical rear part of the support piece 30 is slidably attached to the support piece 30, the rear piece 32 of the upper button holder 31 is applied to the front part of the support piece 30, and the set screw 33 inserted into the vertically long hole is inserted into the hole of the support piece 30. It is fixed by being screwed into the screw hole of the mounting base 27 via the.

The lower button holder 35 is the support piece 30.
The horizontal side piece 36 is placed on the horizontal portion 34 of the, and fixed by the set screws 37 inserted in the left and right long holes so as to be adjustable in the front-rear direction, and as shown in FIGS. ,
The shank 41 of the shank button 40 is fitted between 35.

Reference numeral 42 is a cloth pressing portion which is projected from the outside of the horizontal portion 34 to the front. This presser foot and the side piece 36
A large number of irregularities are formed on the entire lower surface of the horizontal part extending to the lower part of the. A cloth pressing piece 43 which is bent downward from the front edge of the side piece 36 is located between the cloth pressing portion 42 and the upper button holder 31.

Reference numeral 45 in FIGS. 3 and 5 designates a pair of front and rear bearings integrally provided on the front portion of the shank button mount 27, and is provided on the large diameter portion of the front end of the shaft 46 rotatably supported by the bearings. The horizontal portion of the inverted L-shaped rod 47 is slidably fitted into the horizontal hole and fixed with the set screw 49, and the collar 50 that blocks the axial movement of the coaxial 46 is stopped between the bearings 45 of the coaxial 46. Screw 5
The coil spring 51 is attached to the outside of the shaft 46 between the collars 50 so that one end of the coil spring 51 is brought into contact with the mounting base 27 and the other end is locked to the set screw 52 of the one collar 50. A rotating force in the direction of the arrow in FIG. 4 is applied to the shaft 46. The lower end of the rod 47 is slidably inserted into a vertical hole of a shaft 55 fixed to the rear portion of the button pressing spring 54 and fixed by a set screw 56 screwed from the rear end of the shaft 55.

Reference numeral 60 in FIG. 1 and the like denotes an engaging rod for lifting the button holding base fixed on the intermediate portion of the button holding device base 23.
The engagement rod 60 is engaged with a roller 62 at the lower end of an L-shaped suspension rod 61 fixed to the tip of the button-pinch crank 5.

A lower end of a rod 64, whose upper end is connected to the front part of the crank 5 by a ball joint 63, is connected to a rear side surface of the pedestal 15 by a ball joint 65.

Reference numeral 66 is an adjusting screw having its upper end fitted in the guide hole of the arm 1 so as to be able to move up and down, and its lower end is the button holding device base 2 described above.
3 is in contact with the recess 67. The outside 12 of the screw 66 between the arm 1 and the adjusting nut 70 screwed into the screw 66
Applies a coil-shaped pressing spring 71 to urge the device base 23 downward.

Next, the operation of the above embodiment will be described. First, as shown by the chain line in FIG. 1, the front portion of the button holding crank 5 rises, and the front portion of the button holding device base 23 is lifted by the engagement of the roller 62 of the hanging rod 61 and the engaging rod 60, and the rod 64 is lifted. Since the rear part of the pedestal 15 is lifted via the button support member 16, the button support member 16 descends and the upper and lower button holders 31, 35 rise, as shown in FIG. 5, and the member 16 and the holders 31, 35 are wide open. There is.

In this state, the target cloth 72 is attached to the button receiving member 1
6, the shank 41 of the shank button 40 is inserted between the upper and lower button holders 31, 35, and the outer surface of the button 40 is pressed and fixed by the button pressing spring 54.

When a foot switch or the like (not shown) is operated under the condition that the above preparation is completed, the button pinching crank 5 is brought to the position indicated by the solid line in FIG. 1 by the action of a clutch or the like (not shown). The tip of the device stand 23 descends and the tip of the pedestal 15 rises to sandwich the cloth 72 between the cloth pressing portion 42, the cloth pressing piece 43 and the button receiving member 16 as shown in FIG.
Press the shank 41 onto the cloth 72.

Under the condition that the button 40 and the cloth 72 are set as described above, the clutch of the driving portion of the needle bar crank 4 and the feed base 21 is turned on and the needle bar 6 moves up and down to perform sewing by the action of the sewing mechanism in the bed 2. As the sewing of the eyes starts, the feed base 21 swings left and right, and the button holding device base 23 swings left and right together with the button 40.

The needle bar 6 moves up and down at a fixed position, but the button holders 31 and 35 holding the button 40 and the button pressing spring 5 are held.
4, the cloth pressing portion 42, the cloth pressing piece 43, and the like move left and right as shown by the arrows in FIG. 6, and therefore the sewing machine needle 73 at the lower end of the needle bar 6 is used.
6 alternately descends inside and outside the shank 41 as shown by the chain line in FIG.

When sewing has been performed a predetermined number of times, the sewing machine stops operating and each part returns to its original position.

[0033]

As described above, according to the present invention, the pedestal having the button receiving portion for sandwiching the button shank and the cloth as described above and the button sandwiching table having the upper and lower button holders and the cloth pressing portion and the cloth pressing piece are vertically opposed to each other. The button or cloth opens and closes when the button or cloth is attached, making it easy to attach or detach the button or cloth, and buttons of different sizes can be sewn on without changing parts.

Since only the upper button clamp device base oscillates left and right together with the buttons and the cloth hardly moves, there is no slack in the seams, beautiful sewing up, and the button mounting part is wavy. There is an effect such as no.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a plan view of the same as above.

FIG. 3 is an enlarged side view of the main part of the same as above.

FIG. 4 is an enlarged front view of a main part.

FIG. 5 is an enlarged perspective view of the same.

FIG. 6 is an enlarged vertical front view showing a sewing state.

[Explanation of symbols]

 2 bed 5 button lift crank 15 pedestal 16 button receiving member 17 notch for needle drop 21 feed table 23 button pinching device table 31 upper button holder 35 lower button holder 40 shank button 41 shank 54 button presser spring 72 cloth 73 sewing machine needle

Claims (1)

Claims: 1. A feed table that swings left and right in conjunction with sewing of a sewing machine with buttons is provided on the bed, and the rear end of the button holding device stand is swingable in the vertical direction above the bed. And a pedestal that swings only in the vertical direction is provided on the bed below the button clamping device base. Above the pedestal and the button clamping device base, the pedestal and the button are mounted. A button pinching crank for swinging the pinching device base in opposite directions is provided, and a button receiving member having a notch for needle drop is fixed to the tip of the pedestal, and a button receiving member is attached to the tip of the button pinching device base. A button holding device for a button sewing machine, which is provided with upper and lower button holders located above and below a shank and a button presser spring for pressing a button on the upper and lower button holders.