JPH0284987A - Button sewing machine - Google Patents

Abstract

PURPOSE:To easily execute positioning work and to improve the efficiency of button sewing work by displacing a cloth presser and a cloth receiving plate between a cloth set posture, which is protruded in the outer direction of a sewing machine table, and a sewing posture which is positioned in the prescribed position of the sewing machine table. CONSTITUTION:A cloth presser 8 is pulled to a cloth set posture 51 and operated and further, a lifting means 12 is driven. Then, the cloth presser 8 is oscillated and operated upward to a standby posture S3. A cloth receiving plate 9 is also moved forward by the pulling operation and a main plate 9a is protruded upward rather than the tip of a lower arm 5. In such a condition, a sleeve 1 covers the lower arm 5 and main plate 9a and the sleeve 1 is pushed in until the edge of the sleeve is abutted to a stopper 43. When the drive of an air cylinder 32 is stopped in a positioning condition, a feeding mechanism 11 and the cloth presser 8 are oscillated downward by a spring 36 and cloth T is sandwiched and fixed together with the cloth receiving plate 9. After that, a pressing arm 30 is pushed back and operated and the sleeve 1 obtains a sewing posture 52 together with the cloth receiving plate 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a button sewing machine, and is intended to facilitate positioning of fabric with respect to the sewing machine.

[Conventional technology]

As a conventional button sewing machine, for example, the Utility Model 63-5
There is Publication No. 977. In this method, the front and back sides of the fabric are held between a presser arm and a fabric receiving plate, and the fabric is fed and moved by a fixed amount with the presser arm, making it possible to sew multiple buttons in a row, which is mainly used on the sleeves of suits. It is applied to button attachment provided.

[Problem to be solved by the invention]

In the conventional method, markings are made on the fabric in advance, and the fabric is fed in so that it matches the planned position.
Sewing buttons. In other words, it was necessary to perform positioning with the fabric set in the proper sewing position.

However, a button holder, a sewing needle drive mechanism, etc. are located above the area where the button is sewn. Therefore, there is a problem in that these peripheral members obstruct the visibility of the markings when positioning the fabric, making the positioning work time-consuming. especially,
If you want to automatically sew multiple buttons in sequence as described above,
Because sewing begins from the button furthest from the cuff, the sleeve must be inserted deep into the lower arm during positioning, which makes positioning even more difficult.

The present invention has been proposed in view of the above-mentioned problems.The present invention has been proposed by making it possible to attach and position the fabric by pulling out the fabric presser and fabric receiving plate that sandwich the fabric vertically to a position where they protrude from the sewing machine table and are easy to see. The purpose of this invention is to facilitate positioning work and improve the efficiency of button sewing work.

[Means to solve the problem]

In the present invention, as shown in FIG. 1, the fabric presser foot 8 and fabric receiving plate 9 are placed in a fabric setting position S1 in which they protrude outward from the sewing machine table 3b, and in a sewing position S2 in which they are located at a predetermined position on the sewing machine table 3b. It is configured so that it can be displaced between.

Specifically, the fabric presser 8 is moved to the sewing position S2 by the feeding mechanism 11.
The fabric presser foot 8 and fabric receiving plate 9 are connected via an interlocking member 42 so as to be movable together, and a plurality of buttons 2 are sewn in a row. possible.

Further, the feed mechanism 11 is connected to a guide rail 25 and the rail 2
5, and a timing bell (21) for feeding the feed frame 26. This allows for accurate settings.

[Effect]

The fabric presser 8 and the fabric receiving plate 9 are pulled out to the fabric setting position S1, and the fabric T is attached. After this, when the fabric presser foot 8 and the fabric receiving plate 9 are pushed back to the sewing position S2, the fabric T moves to a predetermined sewing position while remaining positioned, and is correctly positioned with respect to the button 2.

〔Effect of the invention〕

In the present invention, the fabric presser foot 8 and the fabric receiving plate 9 can be pulled out toward the outside of the sewing machine table 3b, so that the fabric T can be attached and positioned without anything obstructing the line of sight.

Therefore, the positioning of the fabric T can be performed reliably and easily.
The efficiency of button sewing work can be improved.

The fabric presser foot 8 and the fabric receiving plate 9 are connected by an interlocking member 42, and the fabric presser foot 8 is configured to be operable to be fed from the sewing position S2 to the fabric setting position S1 by the feeding mechanism 11, so that the plurality of buttons 2 can be moved in a row. When sewing the buttons 2, the initial positioning of the fabric T is performed accurately, and the buttons can be attached accurately without causing any deviation in the sewing position or the sewing interval of each button 2.

Further, since the fabric presser foot 8 is supported by the feed frame 26 guided and supported by the guide rail 25, and the feed frame 26 is fed by the timing belt 21, the feed amount of the fabric presser foot 8 and the fabric receiving plate 9 can be accurately controlled. I can do it. Furthermore, the structure of the feed mechanism 11 can be simplified to reduce the cost required for manufacturing it.

〔Example〕

FIGS. 1 to 7 show an embodiment in which the present invention is applied to a special sewing machine 3 for sewing a plurality of decorative buttons 2 arranged in rows on the sleeves 1 of a suit.

The button sewing machine 3 is configured as a lockstitch sewing machine, and has a sewing needle 4 at the lower end of the upper arm 3a.
A lower arm 5 protrudes in the shape of a cantilever and allows the sleeve 1 to fit outwardly. A mechanism is arranged between the upper and lower arms 3a and 5 to fix and hold the fabric T and the button 2 in a predetermined sewing position. The buttons 2 and the fabric T are simultaneously moved by driving back and forth, while the sewing needle 4 moves up and down to pass the sewing thread in parallel or in an X-shape as shown in FIG. 5 to attach the button.

Reference numeral 6 denotes a vibration shaft that outputs the operation of the horizontal weaving mechanism, and this vibration shaft 6 is exposed above the sewing machine table 3b.

In FIG. 2, the mechanism includes a dough presser 8 that holds and fixes the dough T vertically, a dough receiving plate 9, and a button holder 10 that receives and holds the button 2 from a feeder (not shown).
It consists of a feeding mechanism 11 for feeding the fabric presser 8 and the fabric receiving plate 9 back and forth, and an elevating means 12 for swinging the fabric presser 8 up and down via the feeding mechanism 11.

The feeding mechanism 11 includes a pace block 1 on the vibration shaft 6.
A pair of left and right brackets 15 and 1 are fixed upright through 4.
5, and a pair of left and right side frames 16, 16 protruding forward from this bracket 15, and timing pulleys 19, 20 are rotatably attached to the front and rear ends of the side frames 16, 16 via shafts 17, 18. To support. Both pulleys 1
The timing belt 21 is wound around the outer surfaces of the parts 9 and 20.

Then, the shaft 17 on the bracket 15 side is connected to the pulse motor 24.
Through a timing belt mechanism 22 separate from the belt mechanism, it is possible to drive the rotation in both forward and reverse directions. motor 2
4 is fixed to the bracket 15 via the mounting plate 23. Note that the side frame 16 can be oscillated up and down with respect to the bracket 15.

In FIG. 6, guide rails 25, 25 are fixed in a horizontal position to the lower surfaces of the pair of side frames 16, 16. A feed frame 26 is guided and supported by this rail 25 via rollers 27 so as to be movable back and forth.

The rollers 27 are arranged at four locations on the front and rear of the feed frame 26, and engage with the rails 25 to restrict vertical movement of the feed frame 26. The feed frame 26 is fixed to the lower surface of the timing belt 21 via a connecting fitting 28,
It is operated forward and backward by a timing belt 21.

The dough presser 8 consists of a rectangular frame-shaped presser plate 29 and a pair of left and right presser arms 30 attached to the presser plate 29.
0 is fixed to the feed frame 26. When the presser arm 30 is pushed or pulled back and forth in this state, the fabric presser foot 8 is moved to the fabric setting position S1 in which the presser plate 29 protrudes forward of the outer surface of the sewing machine table 3b as shown in FIG. The presser plate 29 can be displaced between the sewing position S2 located above the sewing machine table 3b, and the back and forth movement of the timing belt 21 during this time is absorbed by the idle rotation of the pulse motor 24. That is, the fabric presser foot 8 is supported by the feeding mechanism 11 so as to be movable back and forth, and by driving the pulse motor 24, it can be fed from the sewing position S2 side toward the fabric setting position Sl side.

In the dough setting position S1, a lifting means 12 is provided in order to operate the dough presser 8 into a standby position S3 in which the dough presser 8 is swung upward as shown in FIG. The elevating means 12 uses an air cylinder 32 as an operation source, converts its back and forth movement into an up and down movement with a bell crank 33, and converts this back and forth movement into an up and down movement using an air cylinder 32.
The feed mechanism 1 is
1 to swing the fabric presser 8 up and down about the shaft 17.

A lever (not shown) is fixed to one end of the swing shaft 35 that supports the bell crank 33, and by applying a tension spring 36 to this lever, the feed mechanism 11 and the dough presser 8 are always pivoted downward. The pressing plate 29 can be pressed against the fabric T by applying pressure. The bell crank 33 and the engagement fitting 34 are connected via a roller 37 and an engagement groove 38, and when the feed mechanism 11 side is vibrated left and right and back and forth, the movement is controlled by the sliding of the roller 37 and the engagement groove 38. It can be absorbed.

A fabric receiving plate 9 is provided on the sewing machine table 3b at a portion opposite to the presser plate 29. In FIG. 2, the fabric receiving plate 9 consists of a tongue-shaped main plate 9a facing the presser plate 29, and a passive plate 9b facing the sewing machine table 3b at a small distance. A longitudinal sliding groove 40 is formed in the center of the plate surface of the passive plate 9b, and the passive plate 9b is slidably guided and supported by the vibration generating shaft 6, and as shown in FIG. The presser metal fitting 41 restricts the floating of the passive plate 9b, and supports the entire fabric receiving plate 9 so as to be movable only in the front-back direction.

Further, the side wall of the passive plate 9b and the feed frame 26 are connected by an interlocking member 42 so that the fabric receiving plate 9 can be displaced between the fabric setting posture S1 and the sewing posture S2 together with the fabric presser 8. As mentioned above, the feed frame 26 swings up and down. In order to absorb this displacement, the interlocking member 4
The second connecting hole 42a is an elongated hole in the vertical direction.

A positioning stopper 43 using the side wall of the passive plate 9b
The stopper 43 can be adjusted to move back and forth along a long hole 44 formed in the side wall in the front and back direction.

Although not shown, anti-slip rubber sheets are attached to the opposite walls of the main plate 9a and the presser plate 29, respectively.

The button holder 10 is composed of an arm 45 supported on the vibration shaft 6 so as to be able to swing up and down, a pair of clamping claws 4G and 46 supported at the tip of the arm 45, and a drive mechanism for operating these. . The drive mechanism is provided on the feeder side and is not shown because it is well known in this type of button sewing machine.

The buttons 2 are supported by a carrier arm 47 on the feeder side and fed one by one. By holding the button 2 between the holding claws 46 and swinging the arm 45 upward, the button 2 is transferred from the carrier arm 47 to the button holder 10. Thereafter, by swinging the arm 45 downward as shown in FIG. 1, the button 2 can be brought into close contact with the fabric T located directly below the sewing needle 4.

A light source 48 for displaying a positioning point P is provided on the front end surface of the upper arm 3a of the sewing machine 3. A pair of light sources 48 are provided for each of the right sleeve and the left shaft, and as shown in FIG. 4, they irradiate the positioning point P with spot or linear focused light.

Next, to explain its operation, the dough presser 8 is pulled out to the dough setting posture S1 shown in FIG.
is driven to swing the fabric presser 8 upward to the standby position S3 in FIG. By the pulling operation, the fabric receiving plate 9 also moves forward, and its main plate 9a protrudes upward from the tip of the lower arm 5.

In this state, the sleeve 1 is placed over the lower arm 5 and the main plate 9a, and the sleeve 2 is pushed in until the cuff comes into contact with the stopper 43.

Then, as shown in FIG. 4, the sleeve 1 is positioned so that the side edge 1a of the sleeve 1 coincides with the positioning point (P). At this time, the point to be positioned is located in front of the needle drop position, and as shown in FIG. 3, there is nothing above it that obstructs the field of view, so positioning can be performed easily and reliably. In particular, the sleeve 1 of the suit is formed so that the sleeve width gradually decreases toward the cuff, and the side edge 1a is slightly inclined with respect to the central axis of the sleeve 1. 43, the side edge 1a can be correctly aligned with the feed direction line of the fabric T, and the sewing rows of the buttons 2 can be aligned along the side edge 1a.

When the drive of the air cylinder 32 is stopped in the above-mentioned positioning state, the feeding mechanism 11 and the fabric presser 8 are swung downward by the spring 36, and the fabric T is clamped and fixed in cooperation with the fabric receiving plate 9. After this, push the presser arm 30 backwards,
The sleeve 1 is placed in the sewing position S2 together with the fabric receiver vi9. The moving straw at this time is indicated by the symbol A in FIG.

Next, the button holder 10 is swung downward to bring the button 2 into close contact with the fabric T, and the three members, the fabric presser 8, fabric receiving plate 9, and button holder 10, are simultaneously driven left and right and back and forth by the vibration shaft 6. By sewing, the button 2 can be sewn.

Button holder 1 is attached at the same time as the first button 2 is sewn.
0 swings upward and takes the new button 2 from the carrier arm 47. In addition, the pulse smoke 24 of the feeding mechanism 11
, and rotate the timing belt 21 by a certain amount.
The feed frame 26 is fed. The fabric presser foot 8 and the fabric receiving plate 9 then move toward the fabric setting posture S1 while keeping the fabric T sandwiched and fixed, and the previously sewn button 2 is retracted forward from the needle drop position. The feed stroke at this time is indicated by the symbol B in FIG.

After that, sew the button 2 in the same manner as above, and repeat this process once more to sew a total of 3 buttons 2 to the sleeve 2 as shown in Figure 5. finish. The sleeve 1 is removed from the sewing machine 3 by reversing the installation procedure. Although the figure shows the right sleeve as an example, buttons are attached to the left sleeve in the same way.

The switching of the postures of the fabric presser foot 8 and the fabric receiving plate 9 between the fabric setting posture S1 and the sewing posture S2 can also be performed by driving the feed mechanism 11, so it is not necessarily necessary to manually switch the postures as described above. There's no need.

[Another embodiment example]

The fabric presser foot 8 and the fabric receiving plate 9 may be configured to be movable back and forth with respect to the vibration axis 6 (particularly when sewing one button 2 to the fabric T, the feeding mechanism 11 and the elevating means 12 is unnecessary.

[Brief explanation of drawings]

1 to 7 show an embodiment of the button sewing machine according to the present invention, FIG. 1 is a schematic side view in the sewing position, and FIG. 2 is a longitudinal cross-section of the main parts in the standby position. 3 is a schematic side view of the fabric setting position, FIG. 4 is a plan view of the feed mechanism, FIG. 5 is a plan view showing the button sewing state, and FIGS. 6 and 7 are the feed mechanism, respectively. FIG. 3 is a longitudinal sectional front view showing the mechanism. 3b... Sewing machine table, 6... Vibration shaft, 8... Fabric presser, 9... Fabric receiving plate, 10... Button holder, 11... Feeding mechanism. 21...Timing belt, 25...Guide frame, 26...Feeding frame, 42...Interlocking member, T...Dough, Sl...Dough setting posture, S2 ...Sewing posture.

Claims (3)

[Claims] (1) It has a fabric presser 8 and a fabric receiving plate 9 that sandwich and hold the fabric T vertically, and is equipped with a lateral vibration mechanism that drives these members 8 and 9 and the button holder 10 left and right and front and back. A button sewing machine in which a fabric presser foot 8 and a fabric receiving plate 9 are configured to be movable between a fabric setting position S1 protruding outward from a sewing machine table 3b and a sewing position S2 located at a predetermined position on the sewing machine table 3b. . (2) It is equipped with a feeding mechanism 11 that feeds the fabric presser foot 8 from the sewing position S2 side toward the fabric setting position S1 side, and the fabric presser foot 8 and fabric receiving plate 9 can be moved together via the interlocking member 42. 2. The button-sewing machine according to claim 1, wherein the button-sewing machine is connected to the sewing machine, thereby making it possible to sew a plurality of buttons in a row. (3) The feeding mechanism 11 includes a guide rail 25, a feeding frame 26 guided and supported by the rail 25, and a timing belt 21 for feeding the feeding frame 26,
3. The button sewing machine according to claim 2, wherein the material presser foot 8 is supported by the feed frame 26.