JP2002166767A - Seat equipped with air bag module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To structure a seat so that stay cloths can be pulled to the inside than a cavity of a back pad to directly wrap an air bag module with the stay cloths, respective stay cloths can be stretched and fixed by listing wires disposed at the ends, and expansion pressure of the air bag can be efficiently concentrated to a seam functioning as a breaking part of a trim cover. SOLUTION: The listing wires 11 and 12 comprise support parts 11a and 12a having a length corresponding to the width of ends of the stay cloths 5 and 6 and inserted into the ends, arm parts 11b, 11c, 12b, and 12c folding in parallel from both sides of the support parts 11a and 12a, and shoulder parts 11d, 11e, 12d, and 12e formed by internally bending axial lines in chevron shapes from the support parts 11a and 12a to the arm parts 11b, 11c, 12b, and 12c. The axial ends of respective facing arm parts 11b, 11c, 12b, and 12c of the listing wires 11 and 12 are mutually tangled and fixed to stretch and fix the stay cloths 5 and 6 on the rear side of a side plate 3 with the listing wires 11 and 12.

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 air bag module, a break portion of a trim cover is formed by a seam where one end of each power cloth is stitched together with each end of the trim cover sandwiched therebetween, and two sheets of force are applied. It is proposed that a cloth be provided inside the trim cover, the airbag module be wrapped with two webbings and attached to the side plate of the seatback frame, and the entire seatback including the airbag module be wrapped by the trim cover. (JP-A-11-115676).

In the airbag module-equipped sheet, two webbings are divided on both sides from a seam where a trim cover is to be broken, and one is wound from the side of the back pad to the rear side, and the other is wound on the back pad. It is disclosed that the webbing is assembled by winding up the back pad from the bank portion to the front side, pulling it into the inside of the hanging hole of the trim cover, and connecting each end with a retaining clip.

[0004] In the airbag module-equipped sheet, since the webbing covers the backpad over a large area, the webbing is dragged by the backpad being deformed by the inflation pressure of the airbag, and the airbag is dragged. It is inferior in that the inflation pressure of the bag is concentrated on the seam where the trim cover is to be broken with a webbing.

[0005] Instead of putting the webbing on the back pad from the seam which becomes the break portion of the trim cover, the webbing is pulled inward from the cavity of the backpad, and the airbag module is directly wrapped with the webbing. Tension fastening is performed with a listing wire provided at the end with a webbing.

In the case of using the listing wire, if the end of the webbing supported by the listin wire is shifted in the width direction on the axis along with the assembling work, the airbag module is wrapped in the entire area of the webbing. The situation which cannot be put in arises. Even with this, it is an obstacle to concentrate the inflation pressure of the airbag at the seam where the trim cover is to be broken with the webbing.

[0007]

According to the present invention, the webbing is pulled inward from the cavity of the back pad, the airbag module is directly wrapped by the webbing, and each webbing is securely pulled by a listing wire provided at the end. The purpose of this invention is to provide an airbag module-equipped seat that can be fixed and efficiently concentrates the inflation pressure of the airbag with a webbing at the seam where the trim cover is to be broken, so that the airbag can be quickly inflated and deployed. And

Further, the present invention provides an airbag module-equipped sheet comprising a listing wire that does not come off from each other, and configured so that the inflation pressure of the airbag can be efficiently concentrated with a webbing at the seam where the trim cover is to be broken. The purpose is to.

[0009]

According to a first aspect of the present invention, there is provided an airbag module-equipped seat, comprising: an airbag module in which an airbag is assembled so as to be inflatable and deployable by gas pressure generated from an inflator; A trim cover in which the breaks due to deployment are formed by seams, two webbings with one end sandwiched between the ends of the trim cover by seams that become breaks in the trim cover, and a break in the trim cover With a listing wire that tensions and supports each webbing that is continuous from the seam that will be the part, places the airbag module in the cavity of the back pad, attaches it to the side plate of the seat back frame, and attaches the webbing to the cavity of the back pad Pull it in further, wrap the airbag module with a webbing, and The back pad including the air bag module is wrapped with a trim cover, and the entire back pad including the air bag module is covered with a trim cover. A listing wire having a support portion inserted into an end portion, an arm portion bent in parallel from both sides of the support portion, and a shoulder portion in which an axis extending from the support portion to the arm portion is bent inwardly in the shape of a letter, is provided. The shaft ends of the arm portions opposed to each other are entangled with each other behind the side plate, and each webbing is pulled and fastened with a listing wire.

In the airbag module-equipped seat according to a second aspect of the present invention, the seatback frame is provided with a hooking member for each listing wire, and a hook having a shaft end of each arm bent substantially in a U-shape. , A locking portion formed by bending the shaft end of each hook portion is provided on each listing wire, and each listing wire that is turned behind the side plate is hooked on the hook member by the hook portion,
Each listing wire is configured to be entangled with each other by a lock portion.

[0011]

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 particularly 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 lid is hingedly connected to the case main body, or a housing composed of a case main body and a lower plate provided with a fragile portion such as a V-groove on the 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 also provided on the side plate 3 of the seat back frame 2 with fastening bolts 9 for retainers. 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 bank surfaces from the center of the seat 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. This power cloth 5,6
As shown in FIG. 3, the inflation pressure of the air bag acts only on the sewing thread, and the sewing margins of the front gusset 41 and the side gusset 42 are combined on the cloth surface so that the end of the cloth does not fray. The sewing machine is sewn and separately sewn with a small-numbered sewing thread to provide a continuous loop.

The webbings 5 and 6 are provided with listing wires 11 and 12 formed of rigid wires such as hard steel wires and piano wires as shown in FIG.

The listing wires 11 and 12 have supporting portions 11a and 12a which are 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, 12c, and shoulders 11d, 11e, 12d, 12e in which the axis extending from the support portions 11a, 12a to the arms 11b, 11c, 12b, 12c is bent inwardly.
And hook portions 11f, 11g, 12 obtained by bending the shaft ends of the respective arm portions 11b, 11c, 12b, 12c into a substantially U-shape.
f, 12g and each hook portion 11f, 11g, 12f, 1
Lock portions 11h, 11i, 12 with 2g shaft ends bent
h, 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 and 12, the seat back frame 2 is attached with a hooking member 13 formed of a metal bar or the like 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 placing 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 to the plate surface of the side plate 3 by inserting the nut 10 into the fastening bolt 9 and inserting the airbag module 1 into the receiving hole provided on the surface.

One of the webbings 5, 6 provided on the trim cover 4 is drawn into the cavity 8 of the back pad 7 from one side of the airbag module 1, and the other 6.
From the front portion of the airbag module 1 to the other side portion and into the hollow portion 8 of the backpad 7,
Assembling the cloths 5 and 6 inside the back pad 7.

Next, the listing wires 11, 12 previously provided at the ends of the webs 5, 6 or provided after the webs 5, 6 are assembled are entangled with each other inside the back pad 7.

As shown in FIG. 6A, 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.
As shown in FIG. 7 (partially shown), the webbing 5 (6) does not move in the width direction due to the shoulders 11d (12d).
The airbag module 1 can be easily assembled so as to cover the entire area.

After the webbings 5 and 6 are assembled, 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.

In the airbag module-equipped sheet configured as described above, the two airbags 5 and 6 are provided by being sewn to the seam allowance at the seam at which the break portion 40 is formed. 6, the inflation pressure of the airbag is reduced by the breaking portion 4 of the trim cover 4.
The air bag is provided so that it can be inflated and deployed quickly, by efficiently concentrating on the seam at which the seam becomes zero.

[0030]

As described above, according to the airbag module-equipped seat according to the first aspect of the present invention, the supporting portion inserted into the end of the webbing with a length corresponding to each end width of the webbing. When,
A listing wire having an arm portion bent in parallel from both sides of the support portion and a shoulder portion in which an axis extending from the support portion to the arm portion is bent in the shape of a letter is provided, and axes of the arm portions opposed to the listing wire are provided. The ends are entangled with each other behind the side plate and the webbing is pulled and fastened with a listing wire to draw the webbing inward from the cavity of the back pad and directly wrap the airbag module with the webbing. A tension wire can be securely attached to the end with the listing wire provided at the end, and the inflation pressure of the air bag can be efficiently concentrated with a force cloth at the seam where the trim cover is to be broken, allowing the air bag to be quickly inflated and deployed. Be provided.

According to the airbag module-equipped seat according to the second aspect of the present invention, a hook in which a hooking member for each listing wire is provided in the seatback frame, and a shaft end of each arm is bent in a substantially U-shape. Part and a lock part with the shaft end of each hook part bent are provided on each listing wire, and each listing wire that is turned behind the side plate is hooked on the hook member by the hook part, and each listing wire is attached to each other. Since the listing wires are not entangled by the lock portion, the listing wires can be stably and reliably entangled with each other so as not to come off from the hooking member.

[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. 4 is an explanatory view mainly showing a listing wire for pulling down the webbing of FIG. 3;

FIG. 5 is an explanatory view partially showing the structure for preventing the listing wire of FIG. 3 from being entangled;

FIG. 6A is an explanatory view showing the listing wire of FIG. 5 hooked on a hook member.

FIG. 6B is an explanatory diagram showing the listing wires of FIG. 5 entangled with each other.

FIG. 7 is an explanatory view showing the listing wire of FIG.

[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 Strength cloth 11, 12 Listing wire 11a, 12a Listing wire support shaft part 11b, 11c, 12b, 12c Arm of listing wire Part 11d, 11e, 12d, 12e Shoulder part of listing wire 11f, 12f, 11g, 12g Hook part of listing wire 11h, 12h, 11i, 12i Lock part of listing wire 13 Hook member

Continued on the front page F term (reference) 3B087 CD05 DE01 3D054 AA07 AA21 BB30

Claims (2)

[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. A pair of webbings, one end of which is sewn together with a seam that becomes a break of the trim cover, and a listing wire that pulls and supports each web that is continuous from the seam that becomes the break of the trim cover. Place the airbag module in the cavity of the back pad, attach it to the side plate of the seat back frame, pull the webbing inside from the cavity of the backpad, wrap the airbag module with the webbing, and place the webbing on the side. Tensile fastening with a listing wire to be entangled behind the plate, air bag An airbag module-equipped sheet that covers the entire back pad including the joule with a trim cover, wherein: a supporting portion inserted into the end of the webbing with a length corresponding to each end width of the webbing; A listing wire having an arm portion bent in parallel from the shoulder portion and a shoulder portion in which an axis extending from the support portion to the arm portion is bent inwardly in the shape of a letter, and a shaft end of each arm portion of the listing wire facing the side plate. An airbag module-equipped seat characterized in that the webbings are entangled behind each other and each webbing is pulled and fastened with a listing wire. 2. A seat back frame having a hooking member for each listing wire, a hook portion having a shaft end of each arm portion bent in a substantially U shape, and a lock portion having a shaft end of each hook portion bent. 2. A method according to claim 1, wherein each of the listing wires is provided on each of the listing wires, and each of the listing wires to be turned behind the side plate is hooked on the hook member by a hook portion, and the listing wires are entangled with each other by a lock portion. The airbag module-equipped seat described in 1.