JP2009220633A - Cover body of airbag device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover body of an airbag device for a vehicle reduced in adverse effect on the deploying performance of an airbag by reducing an opening resisting force when opening leather by inflating-deploying the airbag. <P>SOLUTION: In this airbag device 14, a lid 38 opened by inflating the airbag is arranged in a substantially rectangular opening formed at a base member 32. This cover body 11 of the airbag device 14 is provided with skin materials 64 covering the lid 38 and the base member 32 via a skin member adhering layer 63, a sewing part 68 formed by sewing the skin members 64 to each other and arranged to substantially coincide with a first free end 56 and a second free end 57 of the lid 38, a skin opening 77 set in the sewing part 68 overlapped with the first free end 56 and the second free end 57 opened to each other with an opening of the lid 38, and an adhesive force adjusting part 42 connected to the skin opening 77 and the outside of the opening and adjusted so that an adhesive force with the base member 32 may be reduced. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cover body for a vehicle airbag device.

A cover body of a vehicle airbag device includes a leather-covered airbag cover using leather. A leather-covered airbag cover is a cover that covers a folded airbag and is made by attaching leather to a plastic cover body. The back of the leather has many fragile parts with reduced tensile strength. It is formed by arranging a cut (notch). This fragile portion allows the leather to be smoothly broken when the cover body is broken (see, for example, Patent Document 1).
JP 2004-276680 A (page 10, FIG. 1)

However, in the leather-covered airbag cover of Patent Document 1, in order to improve the deployment performance of the airbag, the management of leather having different characteristics such as leather thickness and strength becomes complicated.
In other words, it is necessary to set the thickness of the leather provided with cuts to form the fragile portion to 0.6 mm and the pitch to 4 mm. In the case of more than 0.6 mm and more than 4 mm, the fragile portion is broken. There is a problem that the resistance may increase.

  It is an object of the present invention to provide a cover body for a vehicle airbag device that reduces the resistance to opening when the leather is opened by inflation and deployment of the airbag, thereby reducing adverse effects on the deployment performance of the airbag. Let it be an issue.

  The invention according to claim 1 is a vehicle airbag apparatus in which a lid that is opened by inflation of an airbag is disposed in a substantially rectangular opening formed in the substrate, and the lid and the substrate are bonded to each other. The cover material that is covered via the sewing material, the skin material is sewn together, the sewing part that is arranged so as to substantially coincide with the free end of the lid, and the sewing part that overlaps the free end is set to open with the opening of the lid An epidermis opening, and an adhesive force adjusting part that is connected to the outer side of the skin opening and the opening, and is adjusted so as to reduce the adhesive force with the base material. The bag is continuously opened outward from the free end by the expansion of the bag, and the adhesive force adjusting portion is configured to allow the free end to swing by peeling and extending from the base material.

  The invention according to claim 2 is characterized in that the adhesive force adjusting portion reduces the application area of the adhesive between the skin material and the base material as compared with other adhesive regions.

  The invention according to claim 3 is characterized in that the adhesive force adjusting portion has an uneven portion formed on the substrate, and the contact area of the substrate with respect to the adhesive layer is reduced by the uneven portion of the uneven portion.

  In the invention according to claim 1, the skin material covering the lid and the base material via the adhesive layer and the skin material are stitched together and arranged so as to substantially coincide with the free end of the lid, and continue to the outside of the lid. And a skin opening that is set to a sewing portion that overlaps the free end and that opens the lid and opens at least a part of the region extending to the free end and the outside of the lid, and to the outside of the opening And an adhesive strength adjusting portion that is adjusted so that the adhesive strength with the base material is reduced, so that the outer skin opening continuously extends from the free end to the outer side due to the inflation of the airbag. In addition to being released, the adhesive force adjusting portion peels and extends from the base material to allow the free end to swing. Therefore, the outer skin of the lid can be peeled off without using special processing and without greatly breaking the skin, so that it can be opened in a linear manner and stably opened. There is an advantage that the influence of.

  In the invention which concerns on Claim 2, since the adhesive force adjustment part has reduced the application | coating area of the adhesive agent between a skin material and a base material compared with another adhesion | attachment area | region, it continues to a skin opening part and the outer side of an opening part. The skin material becomes easy to peel off, and the peel resistance of the skin material peeled off from the substrate can be reduced. As a result, there is an advantage that the opening resistance force when the leather is opened by the inflation / deployment of the airbag can be reduced, and the adverse effect on the deployment performance of the airbag can be reduced.

  In the invention according to claim 3, since the unevenness portion is formed on the base material and the contact area of the base material with respect to the adhesive layer is reduced by the unevenness of the uneven portion, the adhesive force adjusting portion is outside the skin opening portion and the opening portion. The outer skin material is easily peeled off, and the peel resistance of the skin material peeling from the base material can be reduced. As a result, there is an advantage that the opening resistance force when the leather is opened by the inflation / deployment of the airbag can be reduced, and the adverse effect on the deployment performance of the airbag can be reduced.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of a passenger compartment that employs a cover body (first embodiment) of a vehicle airbag apparatus according to the present invention.
A cover body (first embodiment) 11 of a vehicle airbag device is employed in an airbag device (vehicle airbag device) 14 for a passenger seat 13 of a vehicle 12. Details will be described later.

The vehicle 12 includes an airbag unit 26 including a vehicle body 21, a passenger compartment 22, a driver seat 23, a passenger seat 13, an instrument panel 24, an airbag device 14 for the passenger seat 13 and an airbag device 25 for the driver seat 23. Prepare.
Leather 31 is adopted and pasted on the instrument panel 24.

FIG. 2 is a view taken in the direction of arrow 2 in FIG.
3 is a cross-sectional view taken along line 3-3 of FIG.
The airbag device 14 for the passenger seat 13 is disposed in a substantially rectangular opening 33 formed in the instrument panel main body (base material) 32 of the instrument panel 24, and a case member 35 attached to the vehicle body 21. An inflator (gas generating device) 36 disposed in the case member 35, a bag 37 as an airbag, an openable lid 38 mounted on the case member 35, the lid 38 and the instrument panel 24. A surface layer portion 41 attached to a base material (instrument panel main body) 32 and an adhesive force adjusting portion 42 provided continuously to the opening 33 of the base material (instrument panel main body) 32 are provided.

  The lid 38 includes a first lid 45 formed on the case member 35 via the first hinge portion 44, a second lid portion 48 formed on the case member 35 via the second hinge portion 47, and a first lid portion. 45 and a tear line 51 engraved in a V-groove shape on the back of the second lid portion 48.

The tear line 51 is formed in the center (W × 50%) of the width W of the lid 38, and the straight center tear line 52 that divides the first lid 45 and the second lid 48, and the longitudinal direction (X The first side tier line 53 formed at one end forming the entire length L of the lid 38 set in the axial direction), and the second side tier line 54 formed at the other end. Then, the central tear line 52 is broken to form the first free end 56 (see FIG. 6) of the first lid 45 and the second free end 57 (see FIG. 6) of the second lid 48.
The case member 35 is formed with a latching convex portion 61 that latches on the instrument panel 24 side.

FIG. 4 is a detailed view of part 4 of FIG. 1 to 3 will be used in combination.
The cover body (first embodiment) 11 will be mainly described.
The cover body (first embodiment) 11 includes a lid 38 and a surface layer portion 41, and the surface layer portion 41 includes a skin material adhesive layer 63, a skin material 64, an adhesive force adjusting portion 42 on the lid 38, Consists of.
The skin material 64 has a space fabric 66 attached to the leather 31 with a leather adhesive layer 65.

  The space fabric 66 is, for example, a cloth material or a composite material of resin, and the sewing storage space portion 71 is substantially aligned with the central tear line 52 on the back to store the sewing portion 68 of the leather 31. Is provided.

The leather 31 is artificial leather or natural leather, and a sewing part 68 is formed by sewing the second leather 74 to the first leather 73. A stitch 75 is provided in the vicinity along the sewing part 68, and the sewing part 68 is a lid. 38 is arranged above the central tier line 52 so as to be substantially coincident with the central tier line 52 on the back side of 38.
Then, the skin opening 77 (see FIG. 6) is formed by the breakage of the thread 76 of the sewing portion 68 positioned on the lid 38, and a predetermined distance from one end (third end point) 86 of the lid 38 of the skin opening 77 is predetermined. Is the first skin peeling portion 81 of the sewing portion 68, and the second skin peeling of the sewing portion 68 is the predetermined distance Ls from the other end point (third end point) 86 of the lid 38 in the skin opening portion 77. Part 82.

  The “peeling of the skin material 64” means that two layers of the leather 31 and the space fabric 66 are peeled together from the base material (instrument panel body) 32 including the space fabric 66 in the leather 31. That is, the space fabric 66 is peeled off from the base material (instrument panel body) 32.

  The distance Ls shown in FIG. 2 is also the length of the adhesive force adjusting portion 42 and is set to about 1.2 times the width W of the lid 38.

The adhesive force adjusting portion 42 is formed outwardly at one end of the lid 38 (in the direction of arrow a1) and outwardly at the other end of the lid 38 (in the direction of arrow a2), and is substantially symmetric with respect to the symmetry axis C. is there.
Outside the one end, it is provided in a region in a triangular region formed by a line segment passing through the first end point 84, the second end point 85, and the third end point 86 in plan view, and a weak adhesive layer 87 is provided in the triangular region. Is formed.

The first end point 84 is an end point separated from the one end (first side portion tear line 53) of the lid 38 by the distance Ls outward (in the direction of the arrow a1).
The second end point 85 is an end point separated from the one end portion of the first hinge portion 44 by the distance L1 outward (in the direction of the arrow a3), and the distance L1 from the one end portion of the second hinge portion 47 to the outside (in the direction of the arrow a4). It is an end point that is only separated.
The third end point 86 is an end point set at one end corner of the first free end 56 or the second free end 57.
In such a triangular region, the same adhesive as that of the skin material adhesive layer 63 is used, but a weak adhesive layer 87 having a different application form is formed.

The length Le of the skin opening 77 is Le = L + 2 × Ls. Specifically, the total length L of the lid 38, the length Ls of the first skin peeling part 81, and the length Ls of the second skin peeling part 82 And the length between the first end points 84 in the range of the adhesive force adjusting unit 42.
The length Lm (see FIG. 1) of the sewing portion 68 is Lm> Le, is longer than the length Le of the skin opening 77, and is the length from the center 24a of the instrument panel 24 to the left end 24b.

5 is a cross-sectional view taken along line 5-5 of FIG. This will be described with reference to FIG.
The weak adhesive layer 87 is formed by arranging an adhesive with a pitch P and a width Ws substantially parallel to both ends (first side tear line 53) of the lid 38. Therefore, the adhesive force per unit area is smaller than that of the skin material adhesive layer 63. The length of the column reaches the line segments S1 and S2 at the ends in the above-described triangular region.
The “other bonding region” is a portion bonded by the skin material bonding layer 63 excluding the triangular region.
Note that the pitch P and the width Ws are guides and may be in a desired range (tolerance).

Next, an example of the procedure for forming the cover body will be briefly described.
First, the base material (instrument panel body) 32 is supported by a jig, and the airbag device 14 for the passenger seat 13 is fitted into the opening 33 formed in the base material (instrument panel body) 32. Next, the skin material adhesive layer 63 is formed on the base material (instrument panel main body) 32 by applying an adhesive to the entire surface except for the adhesive force adjusting portion 42. Subsequently, an application jig is placed in a triangular region where the adhesive force adjusting portion 42 is provided, an adhesive is applied onto the application jig, and the application jig is removed, thereby forming the arranged weak adhesive layers 87.

  After a predetermined time, the space fabric 66 is laminated and pasted on the coated substrate 32. At that time, the edge 88 of the space fabric 66 is separated to form a groove so as to form the sewing storage space portion 71 on the front surface so as to substantially coincide with the back center tear line 52.

  Next, the leather 31 sewed in advance is pasted. That is, the leather adhesive layer 65 is formed by applying an adhesive to the entire surface of the space fabric 66. Subsequently, the sewing portion 68 is fitted into the sewing storage space portion 71, and the remaining leather 31 is laminated and pasted on the space fabric 66 on which the leather adhesive layer 65 is formed. This completes the cover body forming step.

Next, the operation of the cover body of the vehicle airbag device of the present invention will be described.
FIG. 6 is a diagram illustrating a mechanism for opening the cover body. 1 to 5 will be used together for explanation.
When an impact is applied to the front surface of the vehicle, the vehicle airbag device (passenger seat airbag device) 14 is processed based on the front impact information, and then the inflator (gas generating device) based on the inflator operation information. ) 36 is activated.

Since the bag 37 starts to inflate by the inflator (gas generator) 36, the center tear line 52 breaks due to the inflating force of the bag 37, and the center tear line 52 starts from both ends (third end points 86). To the equivalent).
At that time, the thread 76 located in the skin opening 77 of the sewing portion 68 is also broken almost simultaneously, so that the skin opening 77 starts to open.

When torn to both ends (corresponding to the third end point 86), the first side tier line 53 and the second side tier line 54 are broken by the force of expansion of the bag 37 so as to further branch the center tier line 52. Begin to.
At that time, the skin material 64 begins to peel from the base material (instrument panel main body) 32 of the adhesive force adjusting portion 42, the thread of the first skin peeling portion 81 of the sewing portion 68 breaks, and the second skin peeling portion 82 Since the yarn breaks, the first skin peeling portion 81 and the second skin peeling portion 82 start to open as indicated by an arrow a6.

That is, the skin material 64 is peeled off at the adhesive force adjusting portion 42.
In the adhesive force adjusting unit 42, since the adhesives are arranged in a thread shape with a predetermined pitch P and width Ws, the adhesive force is small, and the resistance force when peeling and opening the skin material 64 can be reduced. Therefore, the adverse effect on the deployment performance of the bag 37 can be reduced.

  Subsequently, the first side tier line 53 and the second side tier line 54 continue to be broken by the inflating force accompanying the deployment of the bag 37, and at the same time, the first hinge portion 44 and the second hinge portion 47 are rotated. As the fulcrum shaft, the first lid portion 45 and the second lid portion 48 are rotated and opened as shown by an arrow a6.

  At that time, as described above, the skin material 64 continues to be peeled off by the adhesive force adjusting unit 42. However, in the adhesive force adjusting unit 42, the adhesive is arranged in a thread shape with a predetermined pitch P and width Ws. Is small, and the resistance force when peeling and opening the skin material 64 can be reduced. Therefore, the adverse effect on the deployment performance of the bag 37 can be reduced.

Next, another embodiment will be described.
FIG. 7 is a diagram for explaining the second embodiment and corresponds to FIG. The same components as those in the embodiment shown in FIGS. 1 to 6 are designated by the same reference numerals and description thereof is omitted.
The cover body 11B of the vehicle airbag device according to the second embodiment includes an adhesive force adjusting portion 42B.
A weak adhesive layer 87B is formed in the triangular region in the adhesive force adjusting portion 42B, and the weak adhesive layer 87B is characterized in that the adhesive is arranged in a dot shape with a pitch P1.

  The cover body 11B of the vehicle airbag device according to the second embodiment exhibits the same operations and effects as the cover body 11 of the vehicle airbag device according to the first embodiment. That is, the adverse effect on the deployment performance of the bag 37 can be reduced.

FIGS. 8A and 8B are diagrams for explaining the third embodiment and correspond to FIG. The same components as those in the embodiment shown in FIGS. 1 to 6 are designated by the same reference numerals and description thereof is omitted.
The cover body 11C of the vehicle airbag apparatus according to the third embodiment includes an adhesive force adjusting portion 42C.
42 C of adhesive force adjustment parts are characterized by the uneven | corrugated | grooved part 91 being formed in the instrument panel main body (base material) 32 in a triangular area | region. The adhesive layer 93 is formed in the same manner as the skin material adhesive layer 63.

  The concavo-convex portion 91 is formed by straightly forming the groove portion 92 at a pitch P3 and a depth E substantially parallel to both ends of the lid 38. The length is within the aforementioned triangular region, and the ends reach the line segments S1 and S2. Yes.

  The cover body 11C of the vehicle airbag device of the third embodiment exhibits the same operations and effects as the cover body 11 of the vehicle airbag device of the first embodiment. That is, the adverse effect on the deployment performance of the bag 37 can be reduced.

  Further, in the third embodiment, an adhesive layer 93 similar to the skin material adhesive layer 63 can be formed on the entire surface of the space fabric 66 and can be attached to the uneven portion 91 in an overlapping manner, compared with the first embodiment. Adhesive work becomes easy.

In addition, although the cover body of the airbag apparatus for vehicles of this invention was made to respond | correspond to the leather employ | adopted as the instrument panel in embodiment, it can be employ | adopted in the site | part covered with leather besides the instrument panel.
The center tear line 52 of the lid 38 is formed straight, but may be curved. In this case, the sewing part is also a curve that substantially matches the curve.

In the adhesive force adjusting unit 42, the adhesive is arranged with a width Ws and at a pitch P substantially parallel to both ends of the lid 38 (corresponding to the first side portion tear line 53 and the second side portion tear line 54). The orientation may be changed to be arranged substantially parallel to the extended line of the first free end 56 (or the central tear line 52) of the lid 38, and the 45 ° direction may be changed to intersect the extended line of the first free end 56. You may arrange so that.
In the third embodiment, the length of the concavo-convex portion 91 (between the line segments S1 and S2 in the triangular region) may be divided into a plurality at the pitch P1.

  The cover body of the vehicle airbag apparatus according to the present invention is suitable for covering an airbag with leather.

1 is a perspective view of a vehicle compartment that employs a cover body (first embodiment) of a vehicle airbag device of the present invention. FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. FIG. 4 is a detailed view of part 4 of FIG. 3. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a figure explaining the mechanism of opening of a cover body. It is a figure explaining 2nd Embodiment. It is a figure explaining 3rd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Cover body, 32 ... Base material (instrument panel main body), 33 ... Opening part, 37 ... Air bag (bag), 38 ... Lid, 42 ... Adhesive force adjustment part, 56 ... First free end, 57 ... First 2 free ends, 63 ... skin material adhesive layer, 64 ... skin material, 68 ... sewing part, 77 ... skin opening part, 91 ... uneven part.

Claims (3)

A lid that is opened by inflation of an airbag is a vehicle airbag device that is disposed in a substantially rectangular opening formed in a base material,
A skin material covering the lid and the base material via an adhesive layer, and the skin material are sewn together, arranged so as to substantially coincide with the free end of the lid, and extend so as to continue to the outside of the lid. An open sewing portion, a skin opening that is set in the sewing portion that overlaps the free end and that opens the lid and opens at least a part of a region that extends to the free end and the outside of the lid; and An adhesive force adjusting portion that is connected to the outside and adjusted so that the adhesive force with the base material is reduced, and the outer skin opening portion is outside the free end by inflation of the airbag. And the adhesive force adjusting portion is configured to allow the free end to swing by peeling and extending from the base material. Over body.   2. The cover of a vehicle airbag device according to claim 1, wherein the adhesive force adjusting portion reduces an application area of the adhesive between the skin material and the base material as compared with other adhesion regions. body.   The unevenness portion is formed on the base material, and the contact area of the base material with respect to the adhesive layer is reduced by the unevenness of the unevenness portion. A cover body of a vehicle airbag device.

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