JPH05115637A - Button-holding device for button-fastening sewing machine - Google Patents

Abstract

PURPOSE:To provide the subject device which is formed so that loads applied to each member can be reduced when a pressing and releasing movement for a button surface is done by a button-pressing member. CONSTITUTION:The objective device is composed as follows, that is to say, a lifting base-driving mechanisms H and a pressing member-driving mechanism V are connected to a connecting link 15 connected to a driving link 16. A lifting movement for a lifting base 8 is done by the lifting base-driving mechanism, and a pressing and releasing movement for a button surface caused by a bottom- pressing member 24 is done by the pressing memberdriving mechanism.

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 for holding a button with foot on a button sewing machine.

[0002]

2. Description of the Related Art Conventionally, a button sewing machine is provided with a button holding device as shown in FIGS. 6 to 8 in order to prevent the button from being displaced from an appropriate holding position due to vibration during sewing. .. This button holding device is a holding device that holds a footed button B (hereinafter, simply referred to as a button) formed by projecting a foot portion Ba on the back surface as shown in FIG. 6A.

In FIG. 6B, a cloth holding plate 2 is fixed above the needle plate 1, and the cloth W placed on the cloth supporting plate 2 is pressed and fixed from above by the button supporting plate 3. It is supposed to do. Further, a button insertion groove 3a as shown in FIG. 1C is formed in the button support plate 3, and the foot portion B of the button B is inserted into the groove 3a, and the foot portion is formed by the leaf spring 4. By pressing the button B, the vertical and horizontal positions of the button B are regulated. The button support plate 3 and the leaf spring 4 are fixed to a lift table 8 shown in FIG. 8, and by lowering the lift table 8, a cloth W is placed between the button support plate 3 and the cloth support plate 2. Can be fixed.

Reference numeral 5 denotes a button pressing member that presses the surface of the button B. The button pressing member 5 is attached as shown in FIGS. 7 and 8. That is, the button pressing member 5 is fixed to the arm 6 rotatably supported by the fulcrum shaft 7 provided at the eighth front end portion of the ascending / descending portion, and along with the arm 6 along the vertical surface with the fulcrum shaft 7 as the center. It can be rotated. Further, the arm 6 is constantly urged in the counterclockwise direction in FIG. 7 by the winding spring 9, and the urging force causes the button pressing member 5 to move in the direction shown in FIG.
As indicated by the solid line in (b), the button B is pressed against the surface of the button B supported by the button support plate 3 to press the button B rearward. This pressing force causes the button B to move to the position shown in FIG.
As shown in (4), the button support plate 3 is pressed against the front end face of the button support plate 3 so that its movement in the front-rear direction is also restricted and firmly held.

By the way, the above-mentioned button pressing operation by the pressing member 5 is performed when the lifting table 8 is lowered during the sewing operation, and when the lifting table is raised after the completion of the sewing operation or before the start of the sewing operation. Figure 6
As shown by the one-dot chain line (b), the button pressing member 5 can be automatically retracted from the surface of the button holding button B so that the button B can be taken out.

That is, a stopper 10 is provided on the sewing machine arm M so as to face one end of the arm 6, and the arm 6 stops when the elevator table 8 descends.
It is designed to be separated from the lower end of 0. Then, when the lifting platform 8 rises and the arm 6 rises accordingly, one end of the arm 6 abuts on the stopper 10, and the lifting platform 8 further rises.
The arm 6 rotates clockwise around the fulcrum shaft 7 as a result of the ascending, and the button pressing member 5 is separated from the surface of the button B as shown by the alternate long and short dash line in FIG. 6B. Is becoming

On the other hand, the elevating table 8 is rotatably supported at its other end by a fulcrum shaft 11 provided on the sewing machine bed Mb (see FIG. 8), and the sewing machine arm M and the elevating and lowering section 8 are always provided. It is urged downward by a spring 17 interposed between the two. Therefore, one end portion provided with the button support plate 2, the leaf spring 3, the button pressing member 5 and the like is connected to the spring 1
It is also possible to raise the needle plate 1 against the urging force of the lift plate 7, and the lifting / lowering operation of the lift table 8 is performed by the lift table drive mechanism H which is interlocked with the manual operation of the operator or the driving of the cylinder. It

This lifting platform driving mechanism H includes an operating rod 12 which is erected on the upper surface of the other end of the lifting platform 8 and a shaft 13 on the sewing machine frame.
And a swing arm 14 that is swingably attached to the lower end of the swing arm 14. A roller 14a is pivotally attached to the lower end of the swing arm 14, and the roller 14a is in contact with the upper end of the operating rod 12. Has become. In addition, the swing arm of this lifting platform drive mechanism H,
It is connected to one end of an L-shaped drive lever 16 rotatably supported by the sewing machine frame via a connection link 15. The drive lever 16 is manually operated by an operator or driven by a cylinder or the like. The lifting table 8 is moved up and down by the rotation.

That is, when the drive lever 16 is rotated counterclockwise in FIG. 8 in the lowered state of the lift table 8 shown in FIG. 8, the lift drive mechanism H is moved through the connecting link 15.
Swinging arm 14 moves to the left, the upper end of actuating rod 12 is pulled to the left by the movement, and lifting platform 8 rotates counterclockwise about fulcrum shaft 11 and one end of which is a spring. It is held in the raised position against 17.

On the contrary, when the drive lever 16 is rotated clockwise in FIG. 8, the swing arm 1 of the lift base drive mechanism H is moved.
4 swings to the right, and one end of the lift 8 is lowered by the biasing force of the spring 17.

[0011]

As described above, in the conventional button holding mechanism, the button pressing member 5 automatically presses and releases the button as the lifting table 8 moves up and down. Since there is an advantage that the work of attaching and detaching the button B can be simplified, the biasing force of the coil spring 9 applied to the button pressing member 5 at the time of raising the lift 8 causes the tip of the lift 8 to rise. The load on the lifting platform 8 and the lifting platform drive mechanism H increases,
There is a problem that the life of the device is shortened.

That is, the elevator 8 and the elevator drive mechanism H
When a large load is applied to the lift table 8 and the fulcrum shaft 1.
1, lift 8 and operating rod 12, operating rod 12 and swing arm 14
There is a problem that rattling, abrasion, etc. are likely to occur at the connecting portions of the respective members such as the (roller 14a), the swing arm 14 and the shaft 13, and the like, which leads to a reduction in the life of the device.

Therefore, in the conventional device, the movement range of the button pressing member is set as narrow as possible and the biasing force received from the winding spring 9 is set to be small so as to alleviate the above problem. However, this makes it difficult for the operator to insert his / her finger between the button holding member and the button holding member, and causes a problem in operation that the button B cannot be taken out smoothly. It didn't help.

The present invention has been made in view of the above-mentioned problems, and at the same time as the lifting / lowering operation of the lifting platform, the pressing / releasing operation of the button surface by the button pressing member can be automatically performed, and the button pressing member can be moved. An object of the present invention is to provide a button holding device for a sewing machine with buttons, which does not apply a large load to each member even if the range is sufficiently taken, and facilitates button attachment / detachment work and improves the service life of the device. And

[0015]

SUMMARY OF THE INVENTION According to the present invention, there is provided a lift table rotatably and vertically movable on a sewing machine bed, a button support plate provided at one end of the lift table, and the button support plate. A button holding member that holds the foot portion of the button with foot, a button holding member that can move back and forth with respect to the surface of the button supported by the button support plate, a drive lever that is rotatably provided on the machine frame, and A connecting link connected to the drive lever, and the connecting link and the elevator are connected by an elevator drive mechanism, while the connecting link and the button pressing member are connected by a pressing member operating mechanism. The lifting drive mechanism and the pressing member actuating mechanism are driven in accordance with the rotation of the drive lever.

[0016]

In the present invention, the operation of the drive lever causes the lift base and the button pressing member to move via different mechanisms. That is, when the drive lever is rotated in one direction and the connecting member is moved in one direction, the lift base operating mechanism lowers the lift base, and the pressing member operating mechanism operates so that the button pressing member is pressed against the button to drive. By rotating the lever to the other side and moving the connecting member to the other side, the lift base operating mechanism lowers the lift base, and the pressing member operating mechanism operates to separate the button or the pressing member from the button surface. Therefore, no matter how wide the range of movement of the button retainer is set, the load on the movement will not be applied to the lift and lift drive mechanism, and the occurrence of wear and rattling of each member will be greatly reduced. Therefore, the service life of the device can be improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
It will be explained based on. It should be noted that the same parts as those of the above-mentioned conventional technique are denoted by the same reference numerals. In each figure, the lifting table 8, the lifting table driving mechanism H, the connecting link 15, the driving lever 16 and the like are substantially the same as those shown in the above-mentioned prior art, and the needle plate 1 and the cloth in this embodiment are the same. The support plate 2 and the like are also the same as those shown in the above-mentioned prior art.

However, this embodiment has the following configuration, which is different from the above-mentioned prior art. That is,
Reference numeral 22 denotes a fulcrum shaft rotatably supported on the upper surface of one end of the elevating table 8, and 23 is a holding arm fixed to the fulcrum shaft 22, which is rotatable integrally with the fulcrum shaft 22 as a center. ing. The pressing arm 23 is bent in an L shape, and a button pressing member 24 is fixed to one end thereof. By rotating the button pressing member 24 together with the pressing arm 23, the button pressing member 24 is horizontally moved with respect to the surface of the button B (see FIG. 5) held as shown in FIG.

Reference numeral 25 designates the button pressing member 24 for the button B.
Is a pulling spring for urging the pressing arm 23 so as to press the surface Ba of the pressing arm 23, and is installed between the other end of the pressing arm 23 and a spring hook 26 fixed on the lift 8.

Further, V is a pressing member drive mechanism for rotating and moving the pressing arm 23 to move the button pressing member 24 forward and backward with respect to the surface of the button B, and is constituted as follows. That is, 27 is an operating plate whose one end is fixed to the fulcrum shaft 22, 28 is an operating link whose one end is connected to the other end of this operating plate 27, and the other end of this operating link 28 is shown. Extends to the vicinity of the other end of the lifting table 8. Further, the operating link 28 and the operating plate 27 are
As shown in FIG. 3, the elongated hole 28 formed in the operating link 28
They are connected by a shaft 27a inserted in a.

Reference numeral 29 is an interlocking link connected to the other end of the operating link 28, and the other end is the connecting link 1
5 is pivotally attached to the lower end of an interlocking rod 30 whose upper end is fixed to the middle part. The connecting link 29 and the operating link 28 are the long holes 2 formed at the other end of the operating link.
It is adapted to be fixed by a screw (not shown) inserted through 8a.

As described above, the pressing member drive mechanism V is constituted by 27 to 29.

Further, in this embodiment, the button support plate 3 and the plate spring 4 for pressing the button B in the prior art are replaced with a button support plate 31, a button holding member 33, and a positioning member as shown in FIGS. 4 and 5. A plate 32 and the like are provided. Of these, the button support plate 31 is formed by omitting the formation of the button insertion groove 3a of the button support plate 3 described in the conventional art. And this button support plate 31
The foot Ba of the button B placed on the upper surface of the
After the button is brought into contact with the button 2 to regulate the position of the button laterally or laterally, the foot portion Ba thereof is pressed obliquely downward by the inclined portion 33a of the button holding member 33 which is biased downward by the spring 34. By doing so, the movement of the button B in the up-down direction and the left-right direction is restricted. According to this,
The buttons B having different widths of the foot portions Ba can be held.

Next, the operation will be described based on the above configuration. Raising / lowering The eighth raising / lowering operation can be performed in the same manner as in the past by rotating the drive lever 16. That is,
By rotating the drive lever 16 in the clockwise direction in FIG. 2, the connecting link 15 moves to the right, and the swing arm 1
One end of the lift 4 is moved upward about the fulcrum shaft 11 by the lift drive mechanism H composed of 4 and the operating rod 12, and conversely, the drive lever 16 is moved counterclockwise. By doing so, the lift 8 is lowered.

When the button B is mounted, the lifting table 8 is held in the raised position as described above, and the foot portion Ba of the button B is fixed to the positioning plate 32 and the button holding member as described above. And 33. This lift 8
When the button is raised, the button pressing member 24 is set to be held at a position (release position) largely separated from the surface of the button B as shown by the dashed line in FIGS. The button B can be smoothly attached without being hindered by the pressing member 24.

At this point in time, the button B is only restricted in its vertical and horizontal positions, and its position in the front-back direction is not restricted, so that it is not in a completely held state.

Next, the drive lever 16 is rotated counterclockwise to lower the elevating table 8, and the button support plate 31 is lowered to the cloth W placed on the cloth support plate 2 to hold the cloth. ..
At this time, the pressing member drive mechanism V operates as follows.
That is, the connection link 30 along with the drive lever 16 is
When it moves to the left in FIG. 2, the interlocking rod 30 moves with it.
Moves to the left, and the interlocking link 29 moves to the left. As a result, the pressing arm 23, which is biased by the pulling spring 25, rotates clockwise around the fulcrum shaft 22 from the release position shown in FIG. 5, and brings the button pressing member 24 into pressure contact with the surface of the button B. As a result, the back surface of the button B is pressed against the front end surface of the button support plate 31, movement in the front-rear direction is also restricted, and the button B is completely held. Therefore,
The holding position of the button B does not shift due to vibration or the like during the sewing operation.

The button pressing member 24 completes the button pressing operation before the lift 8 reaches the lowest position. Therefore, although the operation link 28 moves to the left even after the button pressing operation is completed, the movement is absorbed by the elongated hole 28a formed at the left end portion of the operation link 9 and is not transmitted to the operation plate 28. Therefore, even if the thickness of the button B from the back surface to the front surface is different, the button B can be properly held within the range of the elongated hole 28b.

When the sewing operation is completed and the button B and the cloth W are to be taken out, the drive lever 16 is rotated counterclockwise in FIG. 2 and the elevating table 8 is raised to support the cloth support plate 2 and the button support. The cloth sandwiched state with the plate 31 is released.
At this time, in the pressing member drive mechanism V, the interlocking rod 30 moves to the right along with the connecting link 15, and moves the operating link 28 to the left. As a result, the operating plate 27 causes the fulcrum shaft 22 to move.
At the same time, it rotates counterclockwise, and the pressing arm 23 rotates in the same direction against the urging force of the pulling spring 25. By this rotation, the button pressing member 24 is held at the release position, and the pressing force on the button B is released. Since the release position is set to a position largely separated from the button B as described above, the operator can easily take out the button.

The release position of the button B can be freely changed by adjusting the connecting position of the interlocking link 29 and the operating link 28 along the elongated hole 28b.

As described above, in this embodiment, the lifting and lowering of the lifting platform 8 and the pressing / releasing operation of the button pressing member 24 are separated from each other, that is, the lifting and lowering driving mechanism H.
And the pressing member drive mechanism V. Therefore, the load for operating the button pressing member 24 is not applied to the lift table drive mechanism H, and conversely, the load for lifting the lift table 8 is not applied.
There is no need to worry. Therefore, the load on each member is significantly reduced, and the wear and rattling of each member can be reduced.

In the above embodiment, the button holding member 3
1 and the positioning plate 32 are used to regulate the vertical and horizontal movements of the button B, but as shown in the prior art, the button insertion groove 3a of the button support plate 3 and the leaf spring 4 are formed.
The movement of the button B in the up-down direction and the left-right direction may be restricted by and, and the present invention is not particularly limited to the above-mentioned embodiment.

[0033]

As described above, in the button holding device for the button sewing machine according to the present invention, the elevating table driving mechanism and the pressing member driving mechanism are connected to the connecting link connected to the driving link to drive the elevating table. While the lifting mechanism is moved up and down by the mechanism, the pressing member drive mechanism is used to press and release the button surface by the button pressing member. Therefore, the load on the lifting operation of the lifting table and the pressing release operation of the button pressing member are performed. The load applied to each member can be separated, and the load applied to each member can be reduced. Therefore, even if the moving range of the button pressing member is set to be large, the occurrence of wear or rattling of each member is significantly reduced, and the service life of the device can be significantly improved.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a front view of what is shown in FIG.

FIG. 3 is a partially enlarged plan view of what is shown in FIG.

FIG. 4 is a perspective view showing a configuration around a button holding member and a positioning member in the embodiment.

5 is an enlarged plan view showing a state where the button shown in FIG. 4 is held.

6A is a perspective view showing a button with a foot, FIG. 6B is a vertical sectional side view showing a button holding state in a conventional button holding device, and FIG. 6C is a button support plate shown in FIG. FIG.

FIG. 7 is a side view showing a button pressing member in a conventional button holding device.

8 is a front view showing a drive mechanism of the button pressing member shown in FIG. 7. FIG.

[Explanation of symbols]

 2 cloth support plate 8 lifting platform 15 connecting link 16 drive lever 24 button holding member 33 button holding member H lifting platform driving mechanism V holding member driving mechanism B foot button

Claims (1)

[Claims] 1. A cloth support plate, which is provided on a needle plate fixed to the sewing machine bed and supports cloth above the needle plate, and a predetermined rotation fulcrum provided on the sewing machine bed, so that the cloth can be moved up and down. A supported lift base, a button support plate that is fixed to one end of the lift base and moves up and down on a cloth support plate together with the lift base, and a foot portion of a button with a foot provided and supported on the button support plate. A button holding member that moves up and down together with the lift base while sandwiching it with the button support plate; a drive lever that is rotatably provided on the machine frame; And a lift base operating mechanism that is connected via a connecting member for moving the lift base up and down in accordance with the rotation of the drive lever, and is provided so as to be able to move forward and backward with respect to the surface of the foot button supported by the button support plate. Button holding member, Is connected between the serial button pressing member and the coupling member,
A pressing member operating mechanism that moves the button pressing member forward and backward in accordance with the movement of the connecting member, and the elevator table operating mechanism is moved by rotating the drive lever to one side to move the connecting member to one side. And the presser member operating mechanism presses the button presser member against the button, while the drive lever is rotated to the other to move the connecting member to the other, the elevator base operating mechanism lowers the elevator base and presses the presser foot. A button holding device for a button sewing machine, wherein a member actuating mechanism separates the button or the pressing member from the button surface.