JPH0534631Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is useful for sewing various thin materials such as front buttons of men's and women's jackets and vests, buttons for inner pockets, buttons for pistol pockets of pants, etc. This invention relates to a button sewing machine that is configured to attach buttons to items, or to attach buttons and perform neck wrapping and sewing, and particularly relates to the treatment of root threads during attaching.

[Prior Art] A button-sewing machine of this type, which attaches and stitches buttons to fabric, is disclosed in, for example, Japanese Patent Laid-Open No. 63-279873.

FIG. 10 shows a side view of the main parts of the conventional button sewing machine disclosed in the above-mentioned publication, etc. In the same figure, 1 is a sewing needle, which is connected to the sewing machine via a lifting mechanism provided in the sewing machine arm (not shown). It reciprocates up and down at a fixed position. Reference numeral 2 denotes a fabric guide, which is fixedly connected between a pair of left and right fabric holder arms 3, 3 so as to be able to adjust its position back and forth, and the sewing needle 1 passes vertically under the fabric guide 2. A throat plate 5 having a through hole 4 is arranged and fixed in close contact with each other.

Reference numeral 6 denotes a fabric holder which folds the fabric 8 on which the button 7 is to be sewn into two, is inserted into the middle of the two-folded fabric 8, and places and fixes the two-folded fabric 8 on the fabric guide 2. Reference numeral 9 denotes a cylinder for rotating the fabric holder, and by storing and expanding the cylinder 9, the fabric holder 6 can be fixed and released from the fabric 8 via the connecting rods 10, 11, the shaft 12, the movable arm 13, and the bracket 14. Switch to

Reference numeral 15 denotes a dough holder adjustment plate, which is provided along the outside of one of the dough holder arms 3, and whose lower end is attached to be swingable around the shaft 12. A stopper 16 is fixed to the connecting rod 11 and has a bent piece 16a that can come into contact with the upper side of the intermediate portion of the fabric holder adjustment plate 15.

A stopper adjuster 17 is attached to the fabric holder arm 3, and its tip is attached to the fabric holder adjustment plate 15 via a support shaft 18.

Reference numeral 19 denotes a fabric presser, which abuts from diagonally above the upper surface of the folded fabric 8 placed on the fabric guide 2 by the fabric holder 6, and presses the fabric 8 onto the needle plate 5.
This prevents the fabric 8 from bending by pressing it in the forward direction f away from the fabric 8.

Next, the operation of the above configuration will be explained.

After folding the fabric 8 in half and setting it on the fabric holder 6, the cylinder 9 is extended by depressing a pedal (not shown), and the fabric holder 6 is pressed and fixed together with the above-mentioned bifold fabric 8 on the upper surface of the fabric guide 2. , press the upper surface of the double-folded dough 8 diagonally from above with the dough presser 19 to press the dough 8
prevents deflection.

On the other hand, the button 7 is set in a rooted position through a button holder (not shown in FIG. 10) so that its button hole 7a corresponds to the through hole 4 of the throat plate 5.

In this state, start the sewing machine and set the sewing needle 1.
By reciprocating up and down, and at the same time reciprocating a movable table (not shown) in the X-axis direction, root sewing is performed at a preset number of stitches via the root thread 20. This root sewing is completed. In this case, by rotating the button holder 90 degrees, the sewing position can be changed to the neck wrapping sewing position.

Next, by reciprocating the fabric holder 6 and the button holder by a set amount in the X and Y axis directions via the movable table, neck wrapping sewing is performed at a preset number of stitches via the neck wrapping thread 21. As shown in Figure 11a and b, the button 7 is lifted from the fabric 8 and the fabric 8 is firmly held.
sewn on.

In addition, although FIGS. 11a and b show the case of sewing a button 7 having two buttonholes 7a, as shown in FIGS. 12a and b and FIGS. It can also be used in the case of sewing the button 7 having the button 7a, depending on the setting of the amount and direction of movement of the movable table.

[Problem to be solved by the invention] Since the conventional button sewing machine was constructed as described above, the button 7 is sewn onto the fabric 8, which is a thin fabric folded in half, via the root thread 20. In order for the sewing needle 1 to pass through both the upper and lower parts of the folded material 8, the lower end 20a of the root thread 20 is exposed on the back side of the lower material part, as shown by b in FIGS. 11 to 13. This has caused problems in clothing products, which tend to be more luxurious, and can lead to a decline in product quality and deterioration in appearance.

This invention was developed in view of the above-mentioned circumstances, and the purpose is to provide a button sewing machine that can prevent root threads from being exposed to the back side of thin fabrics by making extremely simple structural improvements. .

[Means for Solving the Problems] In order to achieve the above object, the button sewing machine according to the invention includes a sewing needle that reciprocates up and down at a fixed position, and a throat plate having a through hole through which the sewing needle moves. a fabric guide on which the lower fabric of the bifold fabric is placed; a fabric holder inserted between the bifold fabric to place and fix the bifold fabric on the fabric guide; A button holder that holds a button above the bi-folded fabric in a position above the through hole of the plate, and reciprocating the button holder and the fabric holder in at least one two-dimensional direction orthogonal to each other in a horizontal plane. A driving device is provided at the tip of the fabric holder, which is capable of penetrating the upper fabric part of the bifold fabric and holding the upper fabric part of the bifold fabric corresponding to the through hole of the needle plate in a raised state. It is characterized by having a plurality of protruding pin-like bodies.

[Function] According to this invention, a plurality of pin-shaped bodies protruding from the tip of the fabric holder inserted in the middle of the two-folded fabric are passed through the folded part of the two-folded fabric and placed on the fabric guide. By placing and fixing,
The upper fabric portion of the bifold fabric corresponding to the through hole of the throat plate can be held on the fabric guide in a raised state relative to the lower fabric portion.

In this state, by operating the sewing machine and reciprocating the sewing needle up and down, the root thread passes through only the raised upper part of the folded fabric.
Button sewing can be performed on the back side of the lower fabric portion without exposing the root threads.

[Embodiment of the invention] An embodiment of the invention will be described below based on the drawings.

Figures 1 and 2 are perspective views of main parts, respectively;
FIG. 3 is an enlarged side view of the main parts. In the same figure, 1 to 18 are the same components as in the conventional example shown in FIG. Detailed explanation will be omitted.

1 and 2, reference numeral 22 denotes a sewing machine arm, which is equipped with an elevating drive mechanism (not shown) for reciprocating the sewing needle 1 up and down. Reference numeral 23 denotes a button holder, which includes a pair of semicircular arc-shaped clamping pieces 23a, 2 that elastically hold the button 7 from both sides of its circumference.
Consists of 3b.

24 is a cylinder for rotating the button holder, and when this cylinder 24 is extended and stored, the connecting rods 35 and 36 are
The button holder 23 is switched between the root sewing position as shown in FIG. 1 and the neck wrapping sewing position as shown in FIG.

25 is a movable table, this movable table 25
is configured to be synchronously reciprocated in a two-dimensional direction perpendicular to each other in a horizontal plane, that is, in the X-Y axis direction, via two stepping motors and a timing belt 37 (not shown), and this movable table A pair of left and right fabric holder arms 3, 3 are fixed to both left and right sides of the fabric holder 25.

Reference numeral 26 denotes a button holder arm, which is supported by the movable table 25 via an arm joint 27. With the above configuration, the button holder 23 and fabric holder 6 are synchronously reciprocated in the X-Y axis direction via the movable table 25. It is configured to be movable.

FIG. 4 is an enlarged perspective view of the fabric holder 6, and FIG. 5 is an enlarged view of the area indicated by the imaginary circle in FIG. A thick plate member 6B is fixed to the tip of the bent plate member 6A via a screw 27.
It consists of.

28, 28 are pin-shaped bodies, which are attached to the thick plate member 6B.
It is inserted into a hole 6b formed at an appropriate depth from its tip surface and fixed to the thick plate member 6B via tightening screws 29, 29, and its tip is attached to the movable table 25.
These pin-shaped bodies 28, 28
By passing through the upper fabric portion 8a of the bifold fabric 8 placed on the upper surface of the fabric guide 2, the upper fabric portion 8a1 corresponding to the through hole 4 of the needle plate 5 is aligned with the lower fabric portion 8b. As shown in Fig. 5, it is configured to be able to be held in an almost inverted U-shaped raised state.

The above-mentioned button sewing machine with neck wrapping function has a program memory that can program a series of sequence operations such as root sewing and neck wrapping sewing, sewing speed, etc., a data memory that can access various data, and a CPU. It is equipped with a microcomputer unit consisting of a microcomputer unit, and various setting devices for setting the amount of movement of the movable table 25, the number of hand movements, etc. are connected to the microcomputer unit, but these are not directly related to the gist of the invention. Therefore, it is omitted.

Next, the operation of the above configuration will be explained.

As shown in Fig. 1, the button 7 is elastically held in the button holder 23 in the rooting sewing position by the extension of the cylinder 24, and the fabric 8 is folded in half in the fabric holder 6 that is open toward the operator. Set. At this time, the two pin-shaped bodies 28,
Upper fabric part 8a near the folded part of the fabric folded 28 in half
Set it so that it penetrates.

Next, by depressing a pedal (not shown), the cylinder 9 is extended, the fabric holder 6 is swung toward the fabric guide 2, and the lower fabric portion 8b of the folded fabric 8 is placed on the upper surface of the fabric guide 2. The folded fabric 8 is pressed and fixed at the rooting position as shown in FIG.

In this state, start the sewing machine and set the sewing needle 1.
By reciprocating up and down, and at the same time reciprocating the movable table 25 in the X-axis direction, sewing with a preset number of stitches is performed via the root thread 20. In this rooting sewing, the root thread 20 penetrates only the upper fabric part 8a of the bi-folded fabric 8, and is not exposed to the back surface of the lower fabric part 8b.

When the above-mentioned root sewing is completed, the cylinder 24 is contracted, the button holder 23 is rotated, and the sewing position is changed to the neck wrapping sewing position as shown in FIG.

Next, by reciprocating the movable table 25 in the X-Y axis directions by set amounts, the button 7 and the folded fabric 8 are connected via the neck wrapping thread 21, as shown in FIG. Root wrapping is performed on the root thread 20 at a predetermined number of stitches, as shown in Fig. 7a.
As shown in and b, the button 7 is firmly held on the fabric 8 while floating above the fabric 8.

7a and 7b show the case of sewing the button 7 with two buttonholes 7a, but as shown in FIGS. 8a and 8b, the button 7 with four buttonholes 7a is sewn. In either case of parallel rooting or cross rooting of a button 7 having four buttonholes 7a as shown in FIGS.
It can be sewn on without exposing the back side.

Further, in the above embodiment, a single sewing machine is shown that is configured to be able to perform root stitching and neck wrapping in succession, but a button sewing machine exclusively used for root stitching may also be used.

[Effect of the invention] As described above, according to this invention, it is possible to lift only the upper fabric part of the bifold fabric and root the raised part, so that the end of the root thread can be It is possible to sew the button as specified without exposing the button to the back side of the lower fabric part. This makes it possible to improve the quality and finished appearance of clothing products, which are particularly geared toward luxury.

Moreover, the above-mentioned button attachment with good quality and appearance can be achieved by an extremely simple modification of the structure by just protruding a plurality of pin-like bodies from the tip of the fabric holder.

[Brief explanation of the drawing]

1 and 2 are perspective views of the main parts of a button sewing machine according to an embodiment of the invention, FIG. 3 is an enlarged side view of the main parts, FIG. 4 is an enlarged perspective view of the main parts, and FIG. The figure is an enlarged view of the circled part in Fig. 3, Fig. 6 is an enlarged side view of the main part after the neck wrapping is completed, and Figs. 7 a, b to 9 a, b are the sewing of various buttons, respectively. FIG. 10 is an enlarged side view of the main parts of a conventional neck-wrapping button sewing machine, and FIGS. 11a, b to 1
Figures 3a and 3b are a plan view and a front view, respectively, showing a state in which various buttons have been sewn using a conventional neck-wrapping button sewing machine. 1... Sewing needle, 2... Fabric guide, 4... Through hole, 5... Throat plate, 6... Fabric holder, 7... Button, 8... Fabric, 8a... Upper fabric part, 8b...
Lower fabric portion, 20... root thread, 20a... end of root thread, 23... button holder, 25... movable table, 28... pin-shaped body.

Claims (1)

[Scope of utility model registration request] A sewing needle that reciprocates up and down at a fixed position, a needle plate having a through hole through which the sewing needle moves, a fabric guide on which the bottom fabric of the bifold fabric is placed, and a fabric guide that is inserted between the bifold fabric. a fabric holder that places and fixes the bifold fabric on the fabric guide; a button holder that holds the button at the top of the bifold fabric with the button hole positioned above the through hole of the throat plate; In a button sewing machine equipped with a button holder and a drive device that reciprocates the fabric holder in at least one dimension of two-dimensional directions orthogonal to each other in a horizontal plane, an upper fabric of the bifold fabric is attached to a tip of the fabric holder. 1. A button sewing machine, characterized in that a plurality of pin-like bodies are protruded through the upper part of the two-folded material and can hold the corresponding upper part of the fabric in a raised state above the through-hole of the throat plate of the bi-folded material.