JPH10181501A - Side air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to correspond to the enlargement of the expanding force of an air bag without the necessity of giving a tension member to a reinforcing cloth. SOLUTION: The upper and lower ends 24, 25 of a rod 23 attached to the rear end 22 of a reinforcing cloth 20 are insertedly attached to the holding parts (made by a press work) 28, 29 of panel brackets 26, 27. For this reason, it is unnecessary to give the tension member to the reinforcing cloth 20. Consequently, a sewed part at the font end of a gore part does not meander, and is excellent in the point of an outward appearance, and since the correction work of meandering is unnecessary, advantage is produced in working ability. In addition, since the upper and lower ends 24, 25 of the rod 23 are certainly insertedly attached, the attaching strength at the rear end 22 of the reinforcing cloth 20 is high. Thus, the cloth 20 can correspond to the enlargement of the expanding force of the air bag.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side airbag device, and more particularly to a reinforcing cloth provided on the back side of a skin cover that covers a seat back.

[0002]

2. Description of the Related Art When a vehicle receives a collision from the side, an airbag provided on a side portion of a seat back is pushed forward by breaking through a sewn portion of a skin cover, and an occupant is released by the airbag. 2. Description of the Related Art A side airbag device having a structure designed to protect is known.
No. 644491).

In this type of side airbag device, a sewn portion at the front end of a gusset portion that covers the side surface of the seat back is torn to deploy the airbag forward.

[0004] Inside the gusset, a reinforcing cloth is provided in an upper and lower range corresponding to the airbag so as to prevent the gusset itself from being cleaved from the middle.

[0005] The front end of the reinforcing cloth is sewn together with the front end of the gusset, and the rear end is hooked to the seat back frame via a hook. As described above, the structure in which the rear end of the reinforcing cloth is hooked to the seat back frame via the hook, the conventional reinforcing cloth provides sufficient tension to the reinforcing cloth in order to maintain a secure mounting state of the rear end. Need to be kept.

[0006]

However, in such a conventional technique, since a sufficient tension is applied only to the reinforcing cloth, a portion where the reinforcing cloth is present at the sewn portion of the gusset portion is provided. There is a difference in tension between the sewn portion and the sewn portion.

Therefore, conventionally, in order to eliminate meandering,
Additional work such as applying steam to the sewn portion is required, which is very disadvantageous in terms of workability.

Further, in order to improve the protection performance of the occupant, if an attempt is made to change the device to a device in which the inflation force of the airbag is further increased, in addition to the engagement by the hook, the mounting strength of the rear end of the reinforcing cloth is increased. Countermeasures are needed.

The present invention has been made by paying attention to such a conventional technique, and it is not necessary to apply tension to the reinforcing cloth, and it is possible to cope with an increase in the inflation force of the airbag. An apparatus is provided.

[0010]

According to the first aspect of the present invention,
A side bracket is fixed to the seat back frame, an airbag module is attached to the side bracket, the seat back is covered with a skin cover having a gusset corresponding to the side bracket, and a reinforcing cloth is provided inside the gusset. Thereby, in the side airbag device in which only the sewn portion at the front end of the gusset portion is pushed and broken by the airbag deploying forward from the airbag module, the front end of the reinforcing cloth is sewn to the front end of the gusset portion. In addition, a rod is attached to the rear end, and the upper and lower ends of the rod are attached in a state of being inserted into a pair of upper and lower holding portions formed on a panel bracket of the seat back frame.

According to the first aspect of the present invention, since the upper and lower ends of the rod attached to the rear end of the reinforcing cloth are attached to the holding portion of the panel bracket in a state of being inserted, there is no need to apply tension to the reinforcing cloth. Therefore, the sewn portion at the front end of the gusset does not meander, which is excellent in appearance, and is advantageous in terms of workability because it is not necessary to perform a meandering correction operation. Further, since the upper and lower ends of the rod are securely mounted in the inserted state, the mounting strength of the rear end of the reinforcing cloth is high. Therefore, it is possible to cope with an increase in the inflation force of the airbag.

According to a second aspect of the present invention, the upper holding portion is a cut-and-raised portion having a curved cross section for inserting the upper end of the rod, and the lower holding portion supports the lower end of the rod in an inserted state and supported from below. It is a curved and bottomed cut-and-raised portion, in which a mounting hole is provided in the upper part of the upper holding portion, and a bolt for preventing the rod from coming off upward is mounted in the mounting hole.

According to the second aspect of the present invention, since the cut-and-raised portion integrally formed from the panel bracket is used as the "holding portion", the mounting strength of the rod is improved as compared with the case where another holding portion is attached, and as a result, As a result, the mounting strength of the rear end of the reinforcing cloth is increased. In addition, since a bolt for preventing removal is provided at the upper part of the upper cut-and-raised portion, the rod is securely attached to the panel bracket.

According to a third aspect of the present invention, the rear end of the reinforcing cloth is formed in the shape of a loop that is folded back and sewn, and a rod is inserted into and attached to the rear end of the loop.

According to the third aspect of the invention, since the reinforcing cloth has a single structure, the weight of the side airbag device can be reduced.

According to a fourth aspect of the present invention, the reinforcing cloth has a double structure in which the rear end is a folded portion, and a rod is inserted and mounted in the folded rear end of the reinforcing cloth. .

According to the fourth aspect of the present invention, since the reinforcing cloth has a two-fold structure in which the reinforcing cloth is folded in two, the force when the airbag is deployed can be more reliably received. Further, since the rear end of the reinforcing cloth does not need to be formed in a loop shape in order to insert the rod, it is easy to manufacture the reinforcing cloth.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention is shown in FIGS.
A description will be given based on FIG. In the figure, Y is the front-back direction,
X is the vehicle width direction.

FIG. 1 shows a left front seat 1, which comprises a seat cushion 2 attached to a floor panel so as to be able to move back and forth, and a seat back 3 which can be tilted forward.

Inside the seat back 3, a pipe-shaped seat back frame 4 is provided, and a side bracket 5 is attached to the outside of the seat back frame 4 in the vehicle width direction (door side).

An airbag module 8 is mounted on the side bracket 5. The airbag module 8 includes an airbag 11 in a folded state,
It has a structure with a built-in inflator 12 for generating gas for inflating and expanding it.

The seat back 3 is provided with a pad material 13 for obtaining cushioning. Side portions 13a are protrudingly formed on both left and right sides of the pad material 13.

The entire seat back frame 4 to which the pad material 13 and the airbag module 8 are attached is covered with a skin cover 14.

The skin cover 14 includes a main portion 15 covering the front central portion of the seat back 3, a main side portion 16 covering both front portions (the side portions 13a), and a gusset portion 17 covering the side surfaces of the seat back 3. And seat back 3
And a back portion 18 which forms the back surface portion.

The main section 15 and the main side section 1
6, the corresponding ends of the gusset portion 17 and the back portion 18 are sewn via respective "sewn portions" along the vertical direction.

The airbag 11 of this embodiment is deployed forward, so that the sewn portion 19 of the gusset portion 17 and the main side portion 16 is at a regular tearing position, and the skin cover 14 must be split at the sewn portion 19. Must. In general, the normal tearing position in the skin cover 14 changes according to the structure of the airbag module 8 and the distance between the vehicle body side wall adjacent to the seat back 3. Sewing part 19 in the deployment direction of 11
Is opened, so that the airbag 11 is deployed forward in the most effective state.

Therefore, in this embodiment, the gusset part 17
A reinforcing cloth 20 made of canvas is provided from the side bracket 5 to the back part 18 inside the gusset part 17 so as not to be cleaved from the middle. The front end 21 of the reinforcing cloth 20 is sewn together with the front end of the gusset 17 at the sewn portion 19, and the rear end 22 is folded back and sewn to form a loop. Since the reinforcing cloth 20 has a single structure in which the rear end 22 is formed in a loop shape, the weight can be reduced.

Inside the loop-shaped rear end 22, the rod 2
3 is inserted and attached. The length of the rod 23 is longer than the width of the reinforcing cloth 20. When the rod 23 is inserted into the rear end 22, the upper end 24 and the lower end 25 of the rod 23 protrude vertically from the rear end 22.

As shown in FIG. 4, the upper end 24 of the rod 23 is formed flat and has a through hole 24a into which a bolt 32 described later can be inserted.

The upper end 24 and the lower end 25 are coated with a resin to prevent metal contact.

On the other hand, the seat back frame 4 includes a first panel bracket 26 erected in the upper part in a horizontal direction,
A small second panel bracket 27 attached to the lower part is fixed. The first panel bracket 26 and the second panel bracket 27 are integrally formed with cut-and-raised portions 28 and 29 as “holding portions”, respectively.

The upper cut-out portion 28 is formed into a curved cross section so that the rod 23 can be inserted, and the lower cut-out portion 29 is formed.
Has a bottomed shape with a curved cross section that supports the lower end 25 of the rod 23 in an inserted state and from below. A mounting hole 30 is formed in the upper part of the upper cut-and-raised portion 28, and a welding nut 31 is provided in the mounting hole 30.

As a method of attaching the rear end 22 of the reinforcing cloth 20, first, the rear end 22 is positioned between the upper and lower cut-out portions 28, 29, and the rod 23 is cut from above with the cut-and-raised portion 28, the rear end 22, Insert the cut-and-raised portions 29 in this order. After the rod 23 is inserted, the bolt 32 is screwed into the welding nut 31 of the mounting hole 30 through the through hole 24a of the upper end 24, thereby preventing the rod 23 from being pulled out upward. Even when the rod 23 is received, the mounting state of the rod 23 with respect to the cut and raised portions 28 and 29 is securely maintained.

According to this embodiment, the upper end 24 and the lower end 25 of the rod 23 attached to the rear end 22 of the reinforcing cloth 20 are
Upper and lower cut-out portions 28, 2 of each panel bracket 26, 27
Since the sewn portion 19 at the front end of the gusset portion 17 does not meander, since it is attached to the reinforcing cloth 20 in the inserted state, the sewing portion 19 at the front end of the gusset portion 17 does not meander. Since there is no need to perform this, it is advantageous in terms of workability.

The upper end 24 and the lower end 25 of the rod 23
The rear end 2 of the reinforcing cloth 20 is securely inserted in the inserted state.
Since the mounting strength of 2 is high, it is possible to cope with an increase in the inflation force of the airbag 11.

Further, since the cut-and-raised portions 28 and 29 formed integrally from the panel brackets 26 and 27 are used as "holding portions", the mounting strength of the rod 23 is improved as compared with the case where a separate holding portion is mounted. As the rear end 2 of the reinforcing cloth 20
2, the mounting strength is increased. In addition, a bolt 32 for preventing slipping is provided on the upper part of the upper cut-and-raised portion 28,
The mounting state of the rod 23 to the panel brackets 26 and 27 is reliable.

In the above description, the single-piece reinforcing cloth 2
Although the example in which the loop-shaped rear end 22 is provided at the position 0 and the rod 23 is attached thereto has been shown, instead of this, the reinforcing cloth has a double structure in which the rear end is a folded portion and is folded in two, The rod 23 may be inserted and mounted in the folded rear end. In this case, since the reinforcing cloth has a two-piece structure in which the reinforcing cloth is folded in two, the force when the airbag 11 is deployed can be more reliably received. Also, since it is not necessary to make the rear end of the reinforcing cloth into a loop shape in order to insert the rod 23,
The production of the reinforcing cloth is also easy.

Although the cut-and-raised portions 28 and 29 formed integrally with the panel brackets 26 and 27 are used as "holding portions", another "holding portion" may be welded.

Further, a back portion 1 is provided on the back of the seat back 3.
Although the example in which 8 is provided is shown, a back panel may be provided instead.

[0040]

According to the first aspect of the present invention, since the upper and lower ends of the rod attached to the rear end of the reinforcing cloth are inserted into the holding portion of the panel bracket, the tension must be applied to the reinforcing cloth. Absent. Therefore, the sewn portion at the front end of the gusset does not meander, which is excellent in appearance, and is advantageous in terms of workability because it is not necessary to perform a meandering correction operation. Further, since the upper and lower ends of the rod are securely mounted in the inserted state, the mounting strength of the rear end of the reinforcing cloth is high. Therefore, it is possible to cope with an increase in the inflation force of the airbag.

According to the second aspect of the present invention, since the cut-and-raised portion integrally formed from the panel bracket is used as the "holding portion", the mounting strength of the rod is improved as compared with the case where a separate holding portion is attached. As a result, the mounting strength of the rear end of the reinforcing cloth is increased. In addition, since a bolt for preventing removal is provided at the upper part of the upper cut-and-raised portion, the rod is securely attached to the panel bracket.

According to the third aspect of the invention, since the reinforcing cloth has a single structure, the weight of the side airbag device can be reduced.

According to the fourth aspect of the present invention, since the reinforcing cloth has a two-fold structure in which the reinforcing cloth is folded in two, it is possible to more reliably receive the force when the airbag is deployed. Further, since the rear end of the reinforcing cloth does not need to be formed in a loop shape in order to insert the rod, it is easy to manufacture the reinforcing cloth.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a vehicle seat according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a side portion of the seat back.

FIG. 3 is a sectional view corresponding to FIG. 2, showing a state in which the airbag is deployed.

FIG. 4 is an exploded perspective view showing the structure of the seat back frame.

[Explanation of symbols]

 Reference Signs List 3 seat back 4 seat back frame 5 side bracket 8 airbag module 11 airbag 14 skin cover 17 gusset part 19 regular sewing part 20 reinforcing cloth 21 front end 22 rear end 23 rod 24 upper end 25 lower end 26 first panel bracket 27 second Panel bracket 28, 29 Cut-and-raised part (holding part) 30 Mounting hole 31 Weld nut 32 Bolt

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B68G 7/05 B68G 7/05 Z

Claims (4)

[Claims] 1. A side bracket is fixed to a seatback frame, an airbag module is attached to the side bracket, and the seatback is covered with a skin cover having a gusset corresponding to the side bracket. In the side airbag device, only the sewn portion at the front end of the gusset is pushed out by the airbag that deploys forward from the airbag module by providing a reinforcing cloth at the front end of the reinforcing cloth. A side airbag device wherein a front end of the portion is sewn and a rod is attached to a rear end, and upper and lower ends of the rod are attached to a pair of upper and lower holding portions formed on a panel bracket of a seat back frame in a state of being inserted therethrough. . 2. The side airbag device according to claim 1, wherein the upper holding portion is a cut-and-raised portion having a curved cross section for inserting the upper end of the rod, and the lower holding portion is inserted in the lower end of the rod. And a cut-and-raised portion with a curved cross section that supports from below, and has a mounting hole provided on the upper portion of the upper holding portion, and a bolt for preventing the rod from coming off upward is mounted on the mounting hole. Characteristic side airbag device. 3. The side airbag device according to claim 1, wherein a rear end of the reinforcing cloth is formed into a loop shape by folding back and sewing, and a rod is inserted into the rear end of the loop shape. A side airbag device characterized by being attached by mounting. 4. The side airbag apparatus according to claim 1, wherein the reinforcing cloth has a double structure in which the reinforcing cloth is folded in two with the rear end as a folded portion, and the folded rear end of the reinforcing cloth is formed. A side airbag device, wherein a rod is inserted and mounted in the inside.