JP2002166815A - Seat equipped with air bag module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent an end of a stay cloth from being raveled by an expansion pressure of an air bag, efficiently concentrate the expansion pressure of the air bag on a sewing thread at a seam which is as a broken part of a trim cover, and provide the air bag so as to be capable of quick expanding and developing. SOLUTION: Two ring-shaped stay cloths 5 and 6 are provided in which cloth faces are sewed together at the seam, which is as the broken part 40 of the trim cover 4, while being held each ends of the trim cover 4. Both of the stay cloths 5, 6 are pulled to an inner side of a cavity 8 of a back pad 7 to thereby cover the air bag module 1 with both of the stay cloths 5, 6, and each of the ends of the stay cloths 5, 6 continuous from the seam which is as the broken part 40 of the trim cover 4 is pulled and locked to a side plate 3 of a seat back frame 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an airbag module-equipped seat provided with an airbag module in which an airbag is mounted so that it can be inflated and deployed by gas pressure generated from an inflator, for cushioning a side collision. It is about.

[0002]

2. Description of the Related Art Conventionally, as a sheet equipped with an airbag module, a break portion of a trim cover is formed by a seam where one end of each webbing is sewn together with a trim cover sandwiched therebetween. Inside the trim cover, the air bag module is wrapped with two webbings and attached to the side plate of the seat back frame, and the entire seat back including the air bag module is covered with the trim cover. (JP-A-11-115676).

[0003] The airbag module-equipped sheet is provided with a single webbing cut as a webbing.
Each end of the trim cover is sandwiched between the ends of the power cloth and sewn together at a seam that becomes a break part of the trim cover.The two power cloths are divided on both sides from a seam that becomes a break part of the trim cover, and It is disclosed that one sheet is rolled from the side of the back pad to the rear side, and the other sheet is rolled from the bank of the back pad to the front side to fasten the terminal.

In the airbag module equipped sheet, since each end of one piece of webbing cut into a belt shape is sewn together with the terminal of the trim cover, the airbag is released from the edge of the webbing by the inflation pressure of the airbag. When the airbag inflates due to the side thread slipping along with the sewing thread of the seam that becomes the break portion of the trim cover, the inflation pressure of the airbag may not be concentrated on the seam that becomes the break portion of the trim cover.

[0005]

SUMMARY OF THE INVENTION The present invention reliably prevents the end of the webbing from being unraveled by the inflation pressure of the airbag, and increases the efficiency of the inflation pressure of the airbag at the seam where the trim cover is broken. It is an object of the present invention to provide an airbag module-equipped seat in which the airbag can be concentrated so that the airbag can be quickly inflated and deployed.

[0006]

The airbag module-equipped seat according to the present invention has an airbag module in which an airbag is assembled so as to be inflatable and deployable by gas pressure generated from an inflator, and a rupture caused by inflation and deployment of the airbag. An airbag module comprising a trim cover formed with seams at the seams, and two ring-shaped webbings each sewn together with seams that break the trim cover across each end of the trim cover. Is placed in the cavity of the back pad and attached to the side plate of the seat back frame.Each webbing is pulled inward from the cavity of the back pad, and the airbag module is wrapped with both webs. Each end of the webbing that is continuous from the seam It has been constructed by stopped wearing tensile door.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, FIG. 1 shows a seat back B of an assistant seat equipped with an airbag module 1 on the right side when viewed from the front of a vehicle. The seat back B includes an airbag module 1 and a side plate 3 of a seat back frame 2.
, And a trim cover 4 formed with seams at a break 40 caused by inflation and deployment of an airbag (not shown).
By enclosing the whole, the air bag module is built in.

Although not shown, the airbag module 1 holds the inflator with a retainer and projects the fastening bolts of the retainer outward from the airbag, so that the inflator is integrated with the retainer inside the airbag near the mounting base. Assembling is further performed by protruding the fastening bolts of the retainer to the outside and housing the entirety inside the module case, and including a harness and a connector necessary for forming a circuit with related devices such as an impact sensor.

As the module case, an openable / closable lid is hingedly connected to the case body, or a housing composed of a case body and a lower plate having a fragile portion formed by a V-groove or the like on a front surface thereof is provided with an airbag. Something that can be opened by inflation pressure is provided.

As shown in FIG. 2, the airbag module 1 is wrapped in webbings 5 and 6 and accommodated in the cavity 8 of the back pad 7 and is provided with fastening bolts 9 for the retainer in the side plate 3 of the seat back frame 2. The back pad 7 including the air bag module 1 is entirely covered with the trim cover 4, and the inflator is connected to an impact sensor mounted on the vehicle body by a circuit connection.

The trim cover 4 can be formed of a single material such as genuine leather, synthetic leather, fabric, or the like, or a wading cover in which a skin material, a wading material, and a backing material are integrally laminated. The trim cover 4 sewes a front gusset 41 covering the left and right bank surfaces from the center of the seat surface to a side gusset 42 extending from the peripheral side to the back, and furthermore, the rear gusset 43 can be opened and closed by a slide fastener 44. Sewn into a bag shape.

The trim cover 4 has a front gusset 41 covering the left and right banks from the center of the seating surface and a side gusset 42 extending from the peripheral side to the back. The seam (see FIG. 1) forms a break 40 due to the inflation and deployment of the airbag. The seam, which becomes the break portion 40, is ruptured by the stress caused by the expansion of the airbag while maintaining a strength that can withstand normal usability by sewing a thread of about 8th and a thread of about 20th as upper and lower sewing threads. Easy to sew.

Alternatively, the rupture portion 40 associated with the inflation and deployment of the airbag can be formed by a seam provided in the surface of the side gusset portion 42 close to the open side of the module case. In the trim cover 4, since the break portion 40 is located close to the open side of the module case, the inflation pressure of the airbag can be quickly applied, and the inflation and deployment of the airbag is provided at a position where the backpad 7 does not hinder the inflation and deployment. Is preferred.

The trim cover 4 has a front gusset 4
1, by sandwiching the respective seam allowances of the side gussets 42, by sewing together with the sewing thread forming the above-mentioned breakage portion 40, a material of a material having a small elongation even under the inflation pressure of an airbag such as a polyester nonwoven fabric or a cotton cloth. Two webbings 5 and 6 are provided inside.

As shown in FIG. 3, the webbings 5, 6 act only on the seam at the seam where the inflation pressure of the airbag becomes the breakage portion 40 of the trim cover 4, and the terminal does not come loose. Each of the front end gusset portion 41 and the side gusset portion 42 is sewn together with the sewing margin on the cloth surface, and the cut end is separately sewn with a small-numbered sewing thread to form a ring.

As shown in FIG. 4A (the front gusset portion is shown), the sewing margin of the front gusset portion 41 is matched with the cloth surface to perform the temporary sewing 40a of the webbing 5, and as shown in FIG. The front gusset 41 and the side gusset 42
When the main stitch 40b is performed by matching the respective seam allowances, the power cloths 5 and 6 can be easily sewn together with the front seam 41 and the side seam 42 interposed therebetween. However, temporary sewing can be omitted by sewing the power cloths 5 and 6 together on the cloth surface with the respective seam allowances of the front gusset 41 and the side gusset 42 interposed therebetween.

The webbings 5 and 6 are provided with listing wires 11 and 12 formed of a rigid wire such as a hard steel wire or a piano wire as shown in FIG. The terminal can be fixed to the side plate 3 of the seat back frame 2.

The listing wires 11 and 12 have supporting portions 11a and 12a inserted into the ends of the webbings 5 and 6 with a length corresponding to the end widths of the webbings 5 and 6, and supporting portions 11a and 12a.
arm portions 11b, 11 bent in parallel from both sides of
c, 12b, and 12c, and shoulders 11d, 11e, 12d, and 12 in which the axes extending from the support parts 11a and 12a to the arm shaft parts 11b, 11c, 12b, and 12c are bent inwardly.
e, and hooks 11f, 11g, 1 in which the shaft ends of the arms 11b, 11c, 12b, 12c are bent into a substantially U-shape.
2f, 12g and each hook portion 11f, 11g, 12f,
Lock portions 11h, 11i, 1 with 12g shaft ends bent
2h and 12i.

In the construction of the listing wires 11, 12, the shoulders 11d, 11e, 12d, 12e
It is provided for preventing displacement of the webbings 5 and 6 applied to the axes of 1a and 12a. Lock portions 11h, 11i, 12
As shown in FIG. 5 (only one side is shown), one side 11h is bent laterally from the hook portion 11f, and the other side 12h.
2h is provided so as to be intertwined by bending the hook 2h in a vertical direction outside the hook portion 12f.

Along with the listing wires 11, 12, a hooking member 13 formed of a metal bar or the like is attached to the seat back frame 2 by welding or the like (see FIG. 4). The hook members 13 are connected to the arm portions 11 b, 11 of the listing wires 11, 12 which are parallel to each other.
c, 12b, 12c has an axis longer than the interval between the hooks 11f, 11g, 12f, 1 of the listing wires 11, 12 by bending the axis in a V-shape.
The valley bending parts 13a and 13b which hook 2g are provided.

In order to assemble the seat back B from the respective parts, prior to putting the trim cover 4 on the back pad 6, the fastening bolts 9 protruding from the airbag module 1 as shown in FIG. The airbag module 1 is attached and fixed to the plate surface of the side plate 3 by inserting the nut 10 into the receiving hole provided on the surface and screwing the nut 10 into the fastening bolt 9.

One of the webbings 5, 6 provided on the trim cover 4 is pulled into the cavity 8 of the back pad 7 from one side of the airbag module 1, and the other 6.
Is wound around the airbag module 1 from the front to the other side and drawn into the cavity 8 of the backpad 7 to assemble the webbings 5 and 6 inside the backpad 7. next,
Listing wires 11, 12 previously provided at the ends of the webbings 5, 6 or provided after the webbings 5, 6 are assembled.
On the inside of the back pad 7.

As shown in FIG. 7A, the listing wires 11, 12 are connected to respective hook portions 11f, 11g, 12f,
12g is hooked on the axis of the latch member 13 and FIG.
As shown by b, each hook portion 11f, 12f, 11g, 1
2 g of the valley bent portions 13 a and 13 b of the hooking member 13.
And lock portions 11h, 12h, 11i, 12
By engaging i, they are entangled with each other.

In the listing wires 11 and 12,
The hooks 11f, 11g, 12f, 12g are hooked on the axis of the hook member 13, and the locks 11h, 12
Since h, 11i, and 12i are engaged with each other, they can be stably and reliably entangled with each other so as not to come off from the locking member 13.
Since the webbings 5, 6 do not move in the width direction due to the shoulders 11d, 11e, 12d, 12e, they can be easily assembled so as to cover the airbag module 1 over the entire area.

After assembling the webbings 5, 6, the trim cover 4 may be covered so as to cover the front surface of the back pad 7 including the airbag module 1 as usual.

The airbag module-equipped seat configured as described above includes the two webbings 5 and 6 sewn in a ring shape at the seam where the fabric surfaces are joined to form a break 40, and the entire airbag module 1 is provided. As shown in FIG. 8, each of the webbings 5 and 6 receives the inflation pressure of the airbag and is pulled in a ring shape, thereby reducing the inflation pressure of the airbag to the trim cover 4. The airbag is provided so as to be efficiently concentrated on the sewing thread 40b at the seam to be the breakable portion 40, and the airbag can be quickly inflated and deployed from where the sewing thread 40b is cut.

[0027]

As described above, according to the airbag module-equipped sheet according to the present invention, the cloth surface is sewn together at the seam which becomes the break portion of the trim cover with each end of the trim cover sandwiched therebetween. With two webbings, each webbing is pulled inward from the cavity of the back pad to wrap the airbag module with both webbings, and each end of the webbing is continuous from the seam where the trim cover breaks. By tensioning the part to the side plate of the seat back frame, the terminal of the webbing can be reliably prevented from coming loose due to the inflation pressure of the airbag, and the seam that will break the inflation pressure of the airbag will be a break in the trim cover. The air bag can be quickly inflated and deployed so that the sewing can be efficiently concentrated on the sewing thread.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an airbag module-equipped seat according to the present invention.

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

FIG. 3 is an explanatory view showing a trim cover put on the seat back of FIG. 1 together with a webbing.

FIG. 4a is an explanatory view showing the webbing of FIG. 3 in a temporary sewing state.

FIG. 4b is an explanatory view showing the webbing of FIG. 3 in a lockstitch state.

FIG. 5 is an explanatory view mainly showing a listing wire for pulling and stopping the webbing of FIG. 3;

FIG. 6 is an explanatory view partially showing the structure for preventing the entanglement of the listing wire of FIG. 3;

FIG. 7A is an explanatory view showing the listing wire of FIG. 6 hooked on a hook member.

FIG. 7B is an explanatory diagram showing the listing wire of FIG. 6 entangled.

FIG. 8 is an explanatory diagram showing the webbing of FIG. 3 in a tensioned state by the inflation pressure of an airbag.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air bag module 2 Seat back frame 3 Side plate 4 Trim cover 40 Break portion of trim cover 5, 6 Power cloth

Claims (1)

[Claims] 1. An airbag module in which an airbag is assembled so as to be inflatable and deployable by a gas pressure generated from an inflator, a trim cover in which a break portion caused by inflation and deployment of the airbag is formed by a seam, and each terminal of the trim cover. And two pieces of webbing in the form of a ring, each of which is sewn together with a seam that is a break in the trim cover, and the airbag module is placed in the cavity of the backpad and the side plate of the seatback frame , And pull each webbing inside from the cavity of the back pad to wrap the airbag module with both webbings,
An airbag module-equipped seat, wherein each end of a webbing that is continuous from a seam to be a break portion of a trim cover is tension-fastened to a side plate of a seatback frame.