JP3391279B2 - Ornament mounting structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an ornament mounting structure which is mounted on a cover which covers an airbag which is folded and accommodated, and more particularly to an inflatable airbag in the cover. The present invention relates to an ornament mounting structure that is attached to a door that is sometimes opened. The airbag device is mounted on a steering wheel, a front part of a passenger seat, a door, a seat, and the like of an automobile. 2. Description of the Related Art Conventionally, as a cover having an ornament attached to a door that opens when an airbag is inflated,
One described in Japanese Utility Model Laid-Open Publication No. 1-81351 is known. [0003] In the above cover, the cover door portion for disposing the ornament is made of a soft synthetic resin on which the net insert is disposed, and the ornament is moved to the net insert with a thread having elasticity with respect to the disposition portion of the door portion. It was sewn and attached. However, recently, in order to reduce the cost of the cover, the cover is constituted by a two-layer structure of a net insert and a soft synthetic resin layer, or a one-layer structure of a thermoplastic elastomer such as polyolefin or styrene. I was supposed to. [0005] In such a case, the cover made of a thermoplastic elastomer has a larger elongation than the cover in which the net insert is embedded, and even if the ornament is sewn to the cover, there is a possibility that the sewn portion may be elongated and break. Ornaments could not be mounted because they could not be firmly mounted. [0006] Conventionally, an ornament is composed of a decorative part,
A plurality of mounting legs extending from the decorative portion, and each mounting leg is inserted through the insertion hole provided in the door, and the protruding end side of each mounting leg is bent along the rear surface of the door. There is also a structure in which the ornament is locked at the tip side of each mounting leg and attached to the door. However, even with such a mounting structure, when the cover is formed from a stretchable thermoplastic elastomer or the like, there is room for improving the mounting stability. The present invention has been made to solve the above-mentioned problems, and secures a high mounting stability even when a door portion of a cover for covering an airbag of an airbag device is formed of a stretchable material. An object of the present invention is to provide an ornament mounting structure to which an ornament can be mounted. According to the present invention, there is provided a mounting structure for covering a folded airbag and having an opening which is opened when the airbag is inflated. Wherein the ornament comprises a decorative portion, and two mounting legs extending from the decorative portion and having mounting holes for riveting, wherein the door portion comprises: Has two mounting legs, each of which can be inserted through the mounting portion of the ornament.
Two insertion holes, arranged on the back side, extending in parallel along the direction of arrangement of the two insertion holes with the two insertion holes in between, and higher than the two mounting legs and rivets when riveted. And two ribs protruding downward, wherein the ornament allows the mounting legs to be inserted into the respective insertion holes, and the mounting legs are mutually connected between the ribs on the back side of the door. , Bent, overlapped, riveted, and attached to the door. In the mounting structure according to the present invention, the ornament allows the mounting legs to be inserted into the respective insertion holes in the door of the cover, and between the ribs on the back side of the door, the mounting legs. They are folded, overlapped, riveted and attached to the door. That is, the two insertion holes of the door through which the mounting legs of the ornament are inserted are surrounded by ribs protruding along the direction in which the insertion holes are arranged. Even if the door portion extends before breaking, the portion between the insertion holes does not easily expand, and stress concentration hardly occurs on the rivet connecting the mounting leg portions. In addition, it is possible to prevent a crack from entering the periphery of the insertion hole. Therefore, in the ornament mounting structure according to the present invention, even if the door portion of the cover for covering the airbag of the airbag device is formed of a material such as a stretchable thermoplastic elastomer, high mounting stability can be obtained. Ornaments can be attached by securing. Further, since the rib provided on the back side of the door portion of the cover projects lower than the two mounting legs and the rivet at the time of riveting, the folded airbag can be attached to the mounting leg portion. And rivets can be prevented. Of course, since the mounting leg of the ornament is riveted on the back side of the door, the design of the cover door is not impaired, and it is not directly riveted to the door. Riveting is only performed mutually, and the riveting operation is easier than in the case of riveting directly to the door portion. That is, when riveting the mounting leg directly to the door, when riveting, the riveting operation must be performed so as not to reduce the thickness of the door at the rivet fastening portion. This is because riveting work cannot be performed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. A cover 10 to which an ornament 21 of the embodiment is attached is provided at the center of a steering wheel W as shown in FIG. The airbag device 1 is used for the airbag device 1 disposed above the boss B. The airbag device 1 is folded and stored, and an inflator 4 that supplies gas for inflation to the airbag 2. When,
And a bag holder 5 for holding the airbag 2, the inflator 4, and the cover 10. The airbag 2 has a bag shape having an opening 2a at the lower part. The inflator 4 includes a cylindrical main body 4a having a gas discharge port 4b at an upper portion, and a flange 4c protruding from the outer peripheral surface of the main body 4a. The bag holder 5 has the inflator body 4 in the center.
bottom wall 6 in which an insertion hole 6a for inserting a from below is disposed.
And a side wall 7 extending downward from the peripheral edge of the bottom wall 6. The attachment of the airbag 2 and the inflator 4 to the bag holder 5 is performed by opening the airbag 2 through the opening 2.
The annular retainer 3 is provided with bolts (not shown) projecting downward. These bolts are attached to the periphery of the airbag opening 2a, the periphery of the insertion hole 6a of the bag holder bottom wall 6, and the inflator 2. This is done by penetrating through the flange portion 4c and fixing with a nut. The cover 10 is attached to the bag holder 5 by attaching the rivets 9 to the side wall 7 extending downward of the cover 10 on the side wall 7 of the bag holder 5 with the contact plate 8 interposed therebetween. ing. The cover 10 is made of a thermoplastic elastomer such as polyolefin or styrene and has a ceiling wall 11 that covers the upper part of the folded airbag 2 and a projection that projects downward from the lower surface of the ceiling wall 11. And a side wall 20 in the shape of a square tube. At predetermined positions of the side wall portion 20, a plurality of mounting holes 20a for riveting the cover 10 to the side wall 7 of the bag holder 5 are formed. As shown in FIGS. 1 and 2, the ceiling wall portion 11 has a thin H-shaped portion 1 to be broken when viewed from above.
2 are formed, and when the airbag 2 is inflated,
2 is broken to open the two door portions 13 and 14 like a double door. The hinge portions 13a and 14a at the time of opening the doors 13 and 14 are near the side wall 20 in the front-rear direction of the ceiling wall 11. The door portion 14 located on the front side when the airbag device 1 is disposed on the steering wheel W.
As shown in FIGS.
Away from the central portion 12a corresponding to the horizontal bar portion in the "H" shape of the scheduled fracture portion 12,
Arrangement part 1 where ornament part 22 of ornament 21 is arranged
5 are formed. The arrangement portion 15 is formed to be elliptically concave. Insertion holes 17 and 18 through which two attachment legs 23 and 24 of the ornament 21 are inserted are formed at positions near the front and rear edges of the arrangement portion 15 so as to penetrate the front and back. Each insertion hole 17
The opening 18 has a substantially rectangular shape. In order to prevent interference with the rivet 30 used when the ornament 21 is attached, an assembling recess 16 is formed in the middle part between the insertion holes 17 and 18 so as to penetrate the front and back. Further, on the surface side of the arrangement portion 15, FIG.
As shown in 3.5, a plurality (4 in this embodiment, 4) extending in the front-rear direction and supporting the decorative portion 22 of the ornament 21.
) Are protruded upward. Then, on the back side of the arrangement portion 15, FIG.
・ As shown in 3.6, insert the holes 17 and 18
Ribs 19 are formed extending in the front-rear direction along the direction in which the insertion holes 17 are arranged. These ribs 19 are provided with two mounting legs 2 when the rivet 30 is fixed.
It is formed at a height protruding downward from 3.24 or the rivet 30. On the back side of the arrangement portion 15, a rib 1
Two ribs 15b are formed to extend from the outer surface of each rib 19 in the left-right direction. The ornament 21 is, as shown in FIG.
A substantially elliptical decorative portion 2 formed by pressing from a plastically deformable metal plate such as iron or aluminum having a predetermined shape.
2 and two mounting legs 23 and 24 extending outward from edges of side portions of the decorative portion 22 facing each other in front and rear. The decoration part 22 is an elliptical plate-shaped top plate part 2.
2a and a cylindrical peripheral portion 22b extending downward from the peripheral edge of the top plate portion 22a, and a decorative pattern is formed on the top plate portion 22a by press working. Each of the mounting legs 23 and 24 is formed so as to extend from the peripheral portion 22b. Each mounting leg 23
24 have the corresponding insertion holes 17.1 and 17.1, respectively.
8 has a rectangular shape that can be inserted. At the tips 23b and 24b of the two mounting legs 23 and 24, mounting holes 23c and 24c through which the rivet 30 can be inserted are formed. The mounting hole 24c of the mounting leg 24 is formed in an oval shape along the longitudinal direction of the leg 24 in consideration of an assembly error. The rivet 30 used in the embodiment
Are attached to the mounting legs 23 and 24 from one side of the back side of the door 14.
Is used. The attachment of the ornament 21 to the door 14 will be described. First, as shown in FIG. 7A, each of the mounting legs 23 and 24 is perpendicular to the top plate 22a of the decorative portion 22. Is bent downward, and the mounting legs 23 and 24 are inserted into the corresponding insertion holes 17 and 18 from the front side of the door 14 respectively. Next, as shown in FIG. 7B, the back side of the decorative portion 22 is supported against the rib 15a, and the base portion 23a of the mounting leg portion 23 is disposed in the insertion hole 17. Then, the front end 23b is bent toward the mounting recess 16 along the rear surface of the arrangement portion 15, and the mounting hole 23c is aligned with the mounting recess 16. Thereafter, with the base portion 24a of the mounting leg portion 24 disposed in the insertion hole 18, the tip portion 24b is moved toward the mounting recess 16 along the back surface of the mounting leg tip portion 23b. It is folded and overlapped so that the mounting hole 24c matches the mounting hole 23c. When the rivets 30 are inserted into the mounting holes 23c and 24c and the mounting legs 23 and 24 are fixed to each other by the rivets 30, the ornament 21 can be mounted on the arrangement portion 15 of the door 14. Next, the assembling of the airbag device 1 will be described. The retainer 3 is disposed in the airbag 2, the airbag 2 is folded, and the inflator body 4a is inserted from below into the insertion hole 6a. (Not shown) is inserted through the bag holder bottom wall 6 and the inflator flange 4c, and the nut is fastened. Thereafter, the cover 10 to which the ornament 21 is attached and fixed is put on the folded airbag 2 and the side wall portion 20 is riveted 9 to the bag holder side wall 7 to complete the assembly. Then, the airbag device 1 may be disposed on the steering wheel W by a mounting means (not shown) provided on the side wall 7 of the bag holder. When the gas is discharged from the gas discharge port 4b of the inflator 4 after the steering wheel W is mounted on the automobile, the portion to be ruptured 12 is pushed by the inflating airbag 2 to extend and break, and the door 13 14 is opened, and the airbag 2 protrudes from the cover ceiling wall 11 and expands greatly. At this time, in the mounting structure of the ornament 21 according to the embodiment, the mounting legs 23 and 24 of the ornament 21 are provided.
The two insertion holes 17 and 18 of the door portion 14 through which are inserted are surrounded by ribs 19 and 19 protruding in the front-rear direction which is the direction in which the insertion holes 17 and 18 are arranged. Therefore, even if the door portion 14 extends before the breakage with the inflation of the airbag 2, the portion 15 c between the insertion holes 23 and 24 remains in the airbag 2.
Hardly expands in the front-rear direction, which is the direction of the tensile force acting on the disposition portion 15 at the time of inflation, and stress is less likely to be concentrated on the rivet 30 connecting the mounting legs 23 and 24. In addition, cracks are prevented from being formed in the peripheral edges of the insertion holes 17 and 18. Therefore, the ornament 21 of the embodiment
In the mounting structure of (1), even if the door portions 13 and 14 of the cover 10 that covers the airbag 2 of the airbag device 1 are formed of a material such as a stretchable thermoplastic elastomer, the ornament is ensured with high mounting stability. 21 can be attached. Further, in the embodiment, a plurality of ribs 15a are also formed on the front surface side of the arrangement portion 15 of the door portion 14 along the front-rear direction which is the arrangement direction of the insertion holes 17 and 18. Therefore, the portion between the insertion holes 23 and 24 is hardly stretched, and the mounting stability of the ornament 21 is improved. Further, since the ribs 19 provided on the back side of the door portion 14 of the cover 10 project higher and lower than the two mounting legs 23 24 and the rivet 30 when the rivet 30 is fixed, Folded airbag 2
Can be prevented from interfering with the mounting legs 23 and 24 and the rivet 30. Of course, the mounting leg 23 of the ornament 21
24, the rivet 30 is fixed on the back side of the door portion 14, so that the design of the cover door portion 14 is not impaired.
The rivets 30 are not directly riveted to the door portion 14 but are only riveted to each other, and the rivet 30 fixing operation is easier than when riveting to the door portion directly. That is, in the case where the mounting leg is directly riveted to the door portion 14, a riveting operation must be performed so that the thickness of the rivet fastening portion 15 of the door portion 14 is not reduced when the rivet is fastened. This is because the rivet setting operation cannot be performed easily. The mounting legs 23 and 24 and the rivets 30
8 and 9 in order to further prevent the interference between
As shown in the figure, the longitudinal ends of the rib bodies 29a in the longitudinal direction along the direction in which the insertion holes 17 and 18 are arranged are connected to each other by auxiliary ribs 29b.
The 3.24 or rivet 30 may be covered with a square-tube-shaped rib 29. Of course, the projecting height of the rib 29 is
The height is set higher than the mounting legs 23 and 24 and the rivet 30. In the embodiment, the case where the ornament 21 is formed from a plastically deformable metal plate is shown. However, a potting layer or the like is separately provided on the surface side of the top plate portion 22a of the decorative portion 22. Thus, a three-dimensional decorative pattern may be further provided, and the ornament 21 may be formed of a flexible cloth material, leather, or the like. By the way, even if the attachment legs 23 and 24 of the ornament 21 are formed from a flexible cloth material or leather, the attachment legs 23 and 24 may be used.
However, since the rivets 30 are fixed to each other and connected, and the portion 15c between the insertion holes 17 and 18 is hard to extend, there is no possibility that the mounting strength of the ornament is reduced. Further, in the embodiment, the arrangement direction of the insertion holes 17 and 18 provided in the ornament arrangement portion 15 is set to the front-rear direction. However, the insertion holes 17 The arrangement directions of 17 and 18 are appropriately set to the left and right directions and the like, and ribs 19 and 19 provided on the rear surface side of the arrangement portion are formed so as to extend in parallel with each other with the insertion holes 17 and 18 therebetween. May be. Furthermore, in the embodiment, the rivet 30
The case where the assembling concave portion 16 is formed so as to penetrate the disposition portion 15 is shown.
If it does not interfere with the above, an assembling recess that does not penetrate but only penetrates from the back surface side of the door portion 14 and does not penetrate may be used. Further, in the embodiment, the description has been given of the attachment of the ornament 21 to the cover 10 arranged on the steering wheel W.
The present invention can be applied to a cover for covering an airbag of an airbag device mounted on a seat, an inner wall of a vehicle, or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a use mode of a cover to which an ornament according to an embodiment of the present invention is attached.
Corresponds to the -I site. FIG. 2 is a plan view of a cover to which the ornament of the embodiment is attached. FIG. 3 is a cross-sectional view showing a main part of a cover to which the ornament according to the embodiment is attached. FIG. 4 is a development view of the ornament according to the embodiment before attachment. FIG. 5 is a plan view showing a main part of the cover of the embodiment. FIG. 6 is a bottom view showing a main part of the cover of the embodiment. FIG. 7 is a cross-sectional view showing a mounting mode of the ornament of the embodiment. FIG. 8 is a cross-sectional view showing a mounting mode of an ornament according to another embodiment. FIG. 9 is a bottom view of the cover alone in the state shown in FIG. 8 of the same embodiment. [Description of Signs] 2 ... airbag, 10 ... cover, 14 ... door, 15 ... placement part, 17/18 ... insertion hole, 19 ... rib, 21 ... ornament, 22 ... decorative part, 23/24 ... mounting leg Parts, 23c and 24c: mounting holes, 30: rivets.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-250494 (JP, A) JP-A 2-110552 (JP, U) JP-A 4-138109 (JP, U) JP-A 3-108 62208 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60R 13/00 B60R 21/20

Claims (1)

(57) [Claims 1] An ornament mounting structure for attaching an ornament to the door portion of a cover that covers a folded airbag and has a door portion that opens when the airbag is inflated. Wherein the ornament comprises a decorative portion and extends from the decorative portion,
And two attachment legs having attachment holes for riveting, wherein the door portion is located at a location where the ornament is arranged, and two insertion holes through which each of the attachment legs can be inserted, It is arranged on the back side, extends in parallel with the direction of arrangement of the two insertion holes with the two insertion holes therebetween, and protrudes downward higher than the two mounting legs and the rivet when riveted. The ribs are inserted into each of the insertion holes, and the mounting legs are bent between the ribs on the back surface side of the door portion. Stack,
An ornament mounting structure, which is riveted and attached to the door portion.