JP2010158913A - Method for manufacturing leather cover of pad for airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a leather cover of a pad for an airbag device for surely breaking the leather cover along a break line together with the pad when deploying the airbag with an excellent design property in a part for bonding leather and leather. <P>SOLUTION: An end of the first leather 10 and an end of the second leather 20 to be bonded are superimposed collectively in the vertical direction, and the superimposed end is sewn by a sewing machine, the first leather 10 and the second leather 20 sewn by the sewing machine are developed with the superimposed parts 11 and 21 as a center, the superimposed parts 11 and 21 are turned down to the first leather 10 side and the second leather 20 side to form a first turndown part 12 and a second turndown part 22, respectively. The first turndown part 12 and the second turndown part 22 are bonded by a sewing suture 30 applied with the machine sewing. A bonding line 50 of the bonded first turndown part 12 and the second turndown part 22 is arranged at a position of the break line of the pad. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a leather cover for a pad for an airbag device.

A conventional leather cover for airbag device pads has an airbag by reducing the tensile strength of the leather at the break line of the airbag device pad by, for example, perforating or providing a thin wall portion. The leather cover and the pad are configured to be broken at the position of the breaking line during deployment (see, for example, Patent Document 1).
Further, in Patent Document 2, at the position of the break line, separate leathers are folded back, and a connecting piece of paper, leather, or cloth for connecting the leather and the leather is applied from the back and stitched with the folded portion. A leather cover of construction is disclosed.
JP-A-9-183374 German Patent Publication DE 4035975C2

  However, since the leather cover described in Patent Document 1 merely reduces the tensile strength by placing a perforation at the position of the break line or providing a thin wall portion, the airbag device is used when the airbag is deployed. It was not known whether the leather cover would break along the breaking line with the pad for use.

  The present invention solves the above-mentioned problems, and with the airbag device pad when the airbag is deployed, the leather cover is surely broken along the breaking line, and the design of the part where the leather and the leather are joined is achieved. Another object of the present invention is to provide a method for manufacturing a leather cover for a pad for an airbag device.

For this purpose, the method of manufacturing the leather cover for the airbag device pad according to the present invention is such that one end of the first leather and the second leather to be joined are stacked one above the other, and the combined one end is machined,
The first leather and the second leather, which are machined, are developed centering on the overlapping portion,
Folding the overlapped part to the first leather side and the second leather side, respectively, as a first folded part and a second folded part,
The first folded portion and the second folded portion are joined by the suture thread,
The joining line of the said 1st folding | turning part and the said 2nd folding | turning part is arrange | positioned in the position of the fracture | rupture line of the pad for airbag apparatuses, It is characterized by the above-mentioned.
Then, it is desirable that the folded surfaces of the first folded portion and the second folded portion are bonded to each other.
Here, “collecting one end of the first leather and the second leather” generally means aligning the edges of the leather, but the edges may not necessarily be aligned. .
Further, it is preferable that the first folded portion and the second folded portion are respectively sewn with a decorative thread substantially parallel to the joining line. Note that the decorative thread may be sewn only on the front surface side of the folded portion, or the front surface side and the back surface side of the folded portion may be sewn together.

  In the method for manufacturing a leather cover for a pad for an airbag device according to the present invention, as described above, the first folded portion and the second folded portion are directly joined by a suture without a connecting piece, and a separate decorative yarn is also used. Because it can, it is excellent in design.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective explanatory view showing a method for manufacturing a leather cover for a pad for an airbag device of the present invention, FIG. 2 is a partially enlarged front view showing a method for sewing a leather cover according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG. 2, FIG. 4 is a front view of a state in which a leather cover is bonded to an airbag device, and FIG. 5 is a state in which the leather cover is bonded to an airbag device pad. It is sectional drawing.

  As shown in FIG. 1, the ends of the first leather 10 and the second leather 20 to be joined are stacked one above the other. The first leather 10 and the second leather 20 are obtained by cutting flat leather into a predetermined shape. Then, the collected one end is machined. The sewing thread (suture thread) 30 used for sewing is assumed to be a thread that breaks when a certain load is applied, such as a sewed thread.

  Next, the machined first leather 10 and second leather 20 are developed around the overlapping portions 11 and 21. Then, the overlapping portions 11 and 21 are folded back to the first leather 10 side and the second leather 20 side to form a first folded portion 12 and a second folded portion 22, respectively. The first folded portion 12 and the second folded portion 22 are joined by the suture thread 30 that has been sewn.

  The folded surfaces 12a and 22a of the first folded portion 12 and the second folded portion 22 are bonded with an adhesive or the like, respectively. Thereafter, as shown in FIGS. 2 and 3, the surface sides of the first folded portion 12 and the second folded portion 22 are respectively sewn with decorative yarns 41 and 42 substantially parallel to the joint line 50.

  Finally, as shown in FIG. 5, the bonding is performed so that the bonding line 50 between the first folded portion 12 and the second folded portion 22 is disposed at the position of the breaking line 61 of the pad 60 for the airbag device. The formed first leather 10 and second leather 20 are bonded to the airbag device pad 60. The breaking line 61 is a thin-walled breaking line made of a V-shaped groove on the surface opposite to the side to which the leather 10, 20 of the airbag device pad 60 is bonded.

As a method of bonding the joined leather to the airbag device pad,
(1) “Cut flat leather → Sew leather together → Adhere to pad for airbag device”: Adhesion is done by hand, and affixed while stretching the leather wrinkles with a tool such as pliers. In some cases, a three-dimensional shape is formed while sewing leather.
(2) “Cut flat leather → Sew leather together → Use a mold and mold it to the airbag device pad at the same time”: Use a mold to press the leather into the pad shape at the same time as bonding Take wrinkles while stretching.
(3) “Cutting flat leather → stitching leather together → Molding the cut leather using a mold → Adhering to pads for airbag devices”
(4) “Cutting flat leather → Molding the cut leather using a mold → Sewing the leather together → Adhering to the pad for the airbag device”
There is a method.

  When the first leather 10 and the second leather 20 joined by the above method are bonded to the airbag device pad 60, the first leather 10 and the second leather 20 have a three-dimensional shape as shown in FIG. become. In the example of FIG. 4, the first leather 10 and the second leather 20 are joined, the leathers 10 and 70 are joined, the leathers 10 and 80 are joined, the leathers 20 and 70 are joined, and the leathers 20 and 80 are joined. After the bonding, it is bonded to the airbag device pad 60 by the above method.

  The above-described method for manufacturing a leather cover for a pad for an airbag device is a preferred example of the present invention, and other embodiments can be implemented or performed by various methods. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

It is an isometric view explanatory drawing which shows the manufacturing method of the leather cover of the pad for airbag apparatuses of this invention. It is a partially expanded front view which shows the sewing method of the leather cover which concerns on an Example at this invention. It is AA arrow sectional drawing of FIG. It is a front view of the state which stuck the leather cover for airbag apparatuses. It is sectional drawing of the state which bonded the leather cover to the pad for airbag apparatuses.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 1st leather 20 2nd leather 30 Suture thread 11,21 Overlapping part 12 1st return part 22 2nd return part 41,42 Decoration thread 50 Joining line 60 Pad for airbag apparatus

Claims (3)

One end of the first leather and the second leather to be joined together are stacked one on top of the other, and the combined one end is machined,
The first leather and the second leather, which are machined, are developed centering on the overlapping portion,
Folding the overlapped part to the first leather side and the second leather side, respectively, as a first folded part and a second folded part,
The first folded portion and the second folded portion are joined by the suture thread,
Manufacturing of a leather cover for a pad for an airbag device, characterized in that a joining line between the first folded portion and the second folded portion is disposed at a position of a breaking line of the airbag device pad. Method.   The method for manufacturing a leather cover for a pad for an airbag device according to claim 1, wherein the folded surfaces of the first folded portion and the second folded portion are bonded together.   3. The manufacture of a leather cover for a pad for an airbag device according to claim 1, wherein the first folded portion and the second folded portion are each sewn with a decorative thread substantially parallel to the joining line. Method.

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