JPH081745Y2 - Airbag prone stitching device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag back sewn device which is a safety device for automobiles and is used to sew an airbag at the same time.

[0002]

2. Description of the Related Art An air bag, as shown in FIG. 4, has a circular first cloth 1 and a circular second cloth 3 centered on a hole 2.
Are overlapped with each other and the periphery thereof is sewn to form the seam 4.

Then, as shown in FIG. 5, the second cloth 3 is folded back at the seam 4, and the outer peripheries of the first and second cloths 1 and 3 and the inside of the seam 4 are sewn to form a bottom seam 5. Then, the second fabric 3 is pulled out from the center hole 2 and the first fabric 1 is repeated to form the airbag 6 as shown in FIG.

[0004]

By the way, when the airbag 6 is sewn, the bind-off stitch 5 is sewn after the seam 4 is formed, but the stitches 4 on the outer circumferences of the first and second cloths 1 and 3 are sewn. Therefore, the bed of the sewing machine must be put in from the center hole 2 when the bottom stitch is sewn, and therefore cannot be used with a normal sewing machine.

Further, even if the second cloth is folded back by hand,
There is a problem that it is difficult to fold back the fabrics 1 and 3 in parallel with the seam 4 and to guide (feed) the fabrics 1 and 3 accurately, and it is not possible to sew the fabrics cleanly.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a bed of a sewing machine to which a needle plate provided with a stepped portion is fixed, and when the first lever is rotated, it descends on the stepped portion of the needle plate. (EN) Provided is an air bag sewn-up device including a constructed fabric guide.

[0007]

In the present invention, the bed of the sewing machine is inserted through the center hole of the first cloth, the second cloth is folded back on the stepped portion of the needle plate, and the first lever is rotated from the outside of the second cloth. Move the cloth guide down and insert it into the folded portion of the second cloth to set it.

By performing the bind-off stitch with the above setting, it is possible to perform the bind-off stitch with a neat finish outer circumference.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 are block diagrams of an airbag back stitching device according to one embodiment of the present invention, in which a head 7 of a sewing machine is provided with a needle bar 9 interlocking with a balance 8. Needle 1
0 is attached, and a presser foot 11 and an upper feed 12 are attached near the needle 10.

The bed 13 of the sewing machine is of a free arm type, and a needle plate 14 is attached to the leading end of the bed 13, and the needle plate 14 is provided with a stepped portion 15 at the pressing portion.

Further, a supporting portion 16 is mounted on the head 7 of the sewing machine, and one end of the first lever 17 is rotatably supported by the supporting portion 16 by a pin 18 and is held in the state shown in FIG. Thus, the acting force of the torsion spring 28 is received.

An upper end of a doglegged link 20 is rotatably supported by the first lever 17 by a pin 19.

The link 20 is rotatably supported by a pin 22 at one end of a link 21 at a bent portion, and the other end of the link 21 is rotatably supported by a support portion 16 by a pin 23.

Further, an L-shaped cloth guide 24 is fixed to the lower end of the link 20. Further, the second lever 25 is rotatably attached to the lower portion of the support portion 16, and the first lever 1
The second lever 25 is always biased in the direction of its tip 26 by a torsion spring 27 so that the tip hook 26 of the second lever 25 holds the link 20 when 7 is lowered against the spring 28. Has been done.

When the air bag of this embodiment constructed as described above is fitted with the bottom stitch, the first lever 17 is in a horizontal state as shown in FIG. 2, the link 20 is raised, and the L-shaped portion is formed. The cloth guide 24 is a hook 26 of the second lever 25.
Is out of.

Therefore, after the outer peripheries of the first and second cloths 1 and 3 are sewn as shown in FIG. 4, the bed 13 of the sewing machine is inserted from the center hole 2 of the first cloth 1 as shown in FIG. Then, the second cloth 3 is folded back at the stepped portion 15 of the needle plate 14 and set.

When the first lever 17 is lowered, the tip of the cloth guide 24 is inserted into the folded portion of the second cloth 3 via the link 20, and the hook portion 26 of the second lever 25 is linked. 20 to secure the fabric guide 24 in place.

As a result, the folded-back portion of the second fabric 3 is fixed by the fabric guide 24, and the presser foot 11 of the sewing machine is lowered from above the end portion of the first fabric 1 and pressed.

When sewing is performed in this state, the stepped portion 15 of the needle plate 14 and the cloth guide 24 set the first and second cloths 1 and 3.

When sewing is performed in this state, the folded back top 3a of the second fabric 3 is guided by the side wall 15a of the stepped portion 15 of the needle plate 14 and the tip of the fabric guide 24 as shown in FIG. While being sewn, the bottom stitch as shown in FIG. 5 is applied, and the finish can be done neatly.

[0021]

As described above, the binding device for the airbag of the present invention is constructed such that the first and second fabrics are overlapped with each other and the outer periphery thereof is sewn, and then the bed of the sewing machine is sewn from the center hole of the first fabric. , And after folding back the second cloth at the stepped portion of the needle plate, lowering the first lever and inserting the cloth guide into the folded back portion of the second cloth from the outside of the second cloth. The bind-off stitches of the first and second fabrics are set, and then the run-off stitch can be performed in parallel with the seam 4 by driving the sewing machine, and an airbag with excellent durability and a beautiful finish is sewn. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view of an airbag back binding device of the present invention.

FIG. 2 is a configuration diagram of a cloth guide portion in FIG.

FIG. 3 is a view showing a state in which first and second cloths are set in the device portion of FIG.

FIG. 4 is a sectional view in which the outer peripheries of the first and second fabrics are sewn.

FIG. 5 is a cross-sectional view in which the first and second fabrics are sewn flat.

FIG. 6 is a cross-sectional view of an airbag configured by pulling out a second cloth from the center hole and further pulling out and returning the first cloth after performing the sewn seams shown in FIG. 5;

[Explanation of symbols]

 1 1st cloth 2 center hole 3 2nd cloth 13 bed 14 needle plate 15 stepped portion 16 support portion 16 17 first lever 20 dog-legged link 21 link 24 cloth guide 25 second lever 27 torsion spring

Claims (2)

[Scope of utility model registration request] 1. A circular first fabric having a center hole formed thereon is overlaid with a circular second fabric to sew the periphery thereof to form a seam, and then the second fabric is folded back to the outside of the seam. In the air bag which is configured by stacking the outer circumferences of the first and second cloths and the inner side of the second cloth to sew up and sew, and pulling out the second cloth from the center hole and turning the cloth upside down. When forming the seam around the cloth and performing the bottom stitch, the bed of the sewing machine is inserted into the hole of the first cloth, and the second cloth is formed at the stepped portion of the needle plate attached to the bed. And the first lever provided on the support portion of the sewing machine head is rotated to insert the cloth guide in the folded portion of the second cloth in conjunction with the first lever, and to press the upper presser foot. While sewn by the cloth guide and the needle plate, the bind-up stitch An air bag sewn-up device characterized by carrying out sewing. 2. When the first lever is lowered, the second lever
2. The bind-up sewing device for an air bag according to claim 1, wherein the cloth guide is held by the lever.