JP2011194897A - Mounting structure for pillar trim - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure for a pillar trim which is reduced in costs by simpliflying the structure of a molding die for molding the pillar trim.SOLUTION: The resin pillar trim 3 is mounted between a pillar part P and it so as to cover an airbag Ab. On a back surface of a trim body 3b, a mounting seat 5 having a first space part S1 is formed, and a release direction of a first release port 55 of the first space part S1 is formed in a direction approximately perpendicular to a projection direction of the mounting seat 5. On a sitting part 53, a projection part 7 having a second release port 79 of a second space part S2 released to the same side as the first release port 55 is projectedly provided between a pair of side wall parts 71 having an engagement part 73. A fitting hole H fitted with a grommet 9 is formed on the pillar part P, and on the grommet 9, an insertion hole 93 inserted with the projection part 7 and a part 97b to be engaged disengageably engaged with the engagement part 73 are formed. At inflation of the airbag Ab, the engagement part 73 is removed from the part 97b to be engaged under an inflation pressure and the pillar trim 3 is moved to the inside 1 of the vehicle.

Description

  The present invention relates to a pillar trim mounting structure in which an airbag is mounted on a pillar portion of a vehicle body as a safety measure in the event of a vehicle body side collision, and the airbag is attached to the pillar portion so as to cover the airbag from the vehicle interior side.

  In recent years, in order to sufficiently protect an occupant in the event of a vehicle body side collision, there is a gap between a pillar portion that forms part of the vehicle body on the side of the windshield and a resin pillar trim that covers the pillar portion from the inside of the vehicle. An airbag is arranged. For example, as disclosed in Patent Document 1, a protruding portion is integrally projected on the back surface of the pillar trim toward the pillar portion side of the vehicle body, and a grommet is fitted into a fitting hole formed in the pillar portion. At the same time, the protruding portion is inserted into the insertion hole of the grommet so that the pillar trim is attached to the pillar portion. The protrusion includes two plate-like legs that are substantially parallel and flexible, and a flange that protrudes from the tip of the leg in a direction away from each other. A plurality of L-shaped reinforcing ribs projecting in the same direction as the flange portion and connecting the pillar trim back surface and the leg base end side are formed on the base end sides of the two legs. Then, when inserting the protruding portion into the insertion hole of the grommet, the insertion force is relaxed by bending so that the distal end sides of the legs are close to each other with the proximal end side of the leg reinforced by the reinforcing rib as a fulcrum. It has become. When the airbag is inflated, the pillar trim is pushed to the inside of the vehicle by the inflation pressure of the airbag, and the grommet engaged with the hook of the leg and the locking hole of the grommet is moved a predetermined amount to the inside of the vehicle so that the hook is It is configured to be engaged with the periphery of the fitting hole from the outside of the vehicle, and the pillar trim is moved to the inside of the vehicle to facilitate the inflation of the airbag and the pillar trim is not scattered in the vehicle.

JP 2002-67856 (paragraphs 0018 to 0019, FIG. 4)

  By the way, the pillar trim of Patent Document 1 is provided so that two plate-like legs are spaced apart and arranged in parallel, and the flange and the plurality of reinforcing ribs protrude so as to intersect with the outer plane portions of the pair of legs. Therefore, when trying to integrally mold the pillar trim, the collar part becomes undercut, so it is necessary to prepare at least two slide molds that are pulled out in a direction different from the mold drawing direction of the mold, and the mold structure is complicated. In addition, the mold cost is high.

  Further, when two plate portions and a plurality of reinforcing ribs formed as in Patent Document 1 are projected from a gate-shaped mounting seat having an opening that protrudes from the pillar trim toward the back side, the opening is further opened. A slide mold for forming the mold is required, and at least three slide molds are required, which further increases the complexity of the mold structure and the cost.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a mounting structure for a pillar trim that is formed at a low cost by simplifying the structure of a mold for forming the pillar trim.

  In order to achieve the above object, according to the present invention, in the attachment portion to the pillar portion of the vehicle body formed on the back surface of the pillar trim, the opening in the plurality of space portions formed in the portion is formed in the same direction. Features.

  Specifically, the airbag is attached to the pillar portion so as to cover the airbag disposed on the pillar portion of the vehicle body from the inside of the vehicle, and moved to the vehicle interior by the inflation pressure of the airbag when the vehicle body side portion collides. In the mounting structure of the resin pillar trim configured to bulge into the vehicle, the following solution was taken.

  That is, in the first invention, the rear surface of the trim body of the pillar trim has a pair of plate-like leg portions that are separated from each other and project integrally toward the pillar portion side, and the projecting ends of the leg portions are integrated with each other. A substantially gate-shaped mounting seat having a plate-like seating portion connected to the first seat portion is formed, and a first space portion is formed by the pair of legs, the seating portion, and the pillar trim main body, and the first space portion. The first opening is formed so as to be substantially orthogonal to the protruding direction of the mounting seat, and the seat portion is spaced apart from each other and integrally protrudes in the protruding direction of the mounting seat. A protruding portion having a plate-like side wall portion and a bridging portion that integrally connects the protruding ends of the side wall portion to each other is formed, while the second space portion is formed by the pair of side wall portions, the bridging portion, and the seating portion. The second space is formed in the first space. A second opening is formed in the same direction as the opening direction of the outlet, and an engaging portion that bulges in a direction away from each other is formed on the outer surface of the intermediate portion in the protruding direction of the pair of side walls. The pillar portion is formed with a fitting hole into which the grommet is fitted, and the grommet is engaged with the insertion hole into which the protruding portion is inserted, and the engaging portion is detachably engaged. In the mounted state of the pillar trim, the grommet is fitted in the fitting hole of the pillar portion so as not to move inward and outward of the vehicle, while the protruding portion is inserted into the insertion hole of the grommet from the inside of the vehicle. The engaging portion of the projecting portion is engaged with the engaged portion of the grommet, and when the airbag is inflated, the inflation pressure of the airbag acts on the back surface of the pillar trim main body so that the side wall portions are close to each other. If the engaging part is engaged, By leaving to the above projecting portion to move the insertion hole in the vehicle side, characterized in that the pillar trim is configured to move inside the vehicle.

  According to a second aspect, in the first aspect, the grommet is connected to the locked portion of the pillar trim body via an extendable connecting member, and when the airbag is inflated, the inflation pressure of the airbag is the pillar trim body. By acting on the back surface and bending so that the side wall portions are close to each other, the engaging portion is disengaged from the engaged portion, the protruding portion moves to the inside of the insertion hole, and the pillar trim is on the inside of the vehicle. The pillar trim is separated and held by the pillar portion by the connecting member when the connecting member moves and extends.

  According to a third aspect, in the first aspect, a pair of flexible extended side wall portions extending the side wall portions and the extended end portions of the extended side wall portions are integrated with each other on the distal end side of the protruding portion. An extension protrusion including an insertion portion to be connected is formed, and a third space portion is formed by the pair of extension side wall portions, the insertion portion, and the bridging portion, and the third space portion includes the first space portion. A third opening is formed in the same direction as the opening direction of the opening and the second opening, and the insertion portion is provided with a flange portion that protrudes in a direction away from the distal end side outer surface of each extension side wall portion. In the mounted state of the pillar trim, the grommet is fitted in the fitting hole of the pillar portion so as not to move inward and outward of the vehicle, while the insertion portion is inserted into the insertion hole of the grommet from the inside of the vehicle and the protrusion The engaging part of the part is engaged with the engaged part of the grommet. When the airbag is inflated, the engagement portion is detached from the engaged portion and inserted by bending the inflation pressure of the airbag on the back surface of the pillar trim body so that the side wall portions are close to each other. The extension protrusion moves to the vehicle inner side while moving inside the hole to the vehicle inner side, so that the flange portion is locked to the engaged portion from the vehicle outer side, and the pillar trim is held apart from the pillar portion. It is comprised so that it may be carried out.

  In the first invention, the first opening of the mounting seat and the second opening of the protruding portion are formed so as to be in the same opening direction, so that in the formation of the pillar trim, the first space is formed using one slide mold. Since the mounting seat having the portion and the projecting portion having the second space can be formed, the structure of the forming die for forming the pillar trim is simplified, and as a result, the pillar trim can be formed at low cost.

  In the second aspect of the invention, when the airbag is inflated, the pillar trim is moved to the inside of the vehicle by the inflation pressure, the protruding portion is pulled out of the grommet, and the connecting member of the grommet is extended so that the pillar trim is separated and held by the pillar portion. Therefore, the pillar trim is prevented from scattering into the vehicle due to the inflation pressure of the airbag, and the safety of the passenger can be ensured. In addition, when the pillar trim is held apart, most of the inflation pressure of the airbag is applied to the grommet and the locked portion of the pillar trim connected to the connecting member of the grommet. It is not necessary to add directly, and it is not necessary to make the shape of the protruding portion large enough to withstand the expansion pressure, and it can be made compact. That is, the projecting portion can be formed into a compact shape having a minimum necessary strength that can attach and hold the pillar trim to the pillar portion.

  In the third aspect of the invention, when the airbag is inflated, the pillar trim is moved to the vehicle inner side by the inflation pressure, the flange portion is engaged with the engaged portion of the grommet, and the pillar trim is separated and held by the pillar portion. Therefore, like the second invention, the pillar trim is prevented from being scattered in the vehicle by the inflation pressure of the airbag, and the safety of the passenger can be ensured. When the pillar trim is attached to the pillar portion, the extension protrusion and the protrusion extending from the rear surface of the pillar trim body toward the pillar portion are inserted into the insertion hole of the grommet, and then the grommet is fitted into the insertion hole of the pillar portion. Since it is only necessary to wear it, the pillar trim mounting operation is very simple and easy.

  Furthermore, by forming the third opening of the extended protrusion so as to be in the same opening direction as the first opening of the mounting seat and the second opening of the protrusion, one slide mold is used in forming the pillar trim. Since the mounting seat having the first space portion, the projecting portion having the second space portion, and the extended projecting portion having the third space portion can be formed, even the pillar trim having the separation holding structure like the extended projecting portion can be formed. The structure of the mold is simplified, and as a result, the pillar trim can be molded at a low cost.

1 is an interior view of an automobile to which a pillar trim mounting structure according to an embodiment of the present invention is applied. It is the perspective view which omitted the pillar part and looked at the upper end part vicinity of the pillar trim which concerns on Embodiment 1 of this invention from the back side. FIG. 3 is an exploded perspective view of FIG. 2. FIG. 3 is a cross-sectional view taken along line AA of FIG. 2, (a) shows a state where the pillar trim is attached to the pillar portion, and (b) shows a state where the airbag is inflated and the pillar trim is moved to the inside of the vehicle. FIG. 3 is a cross-sectional view taken along the line B-B in FIG. 2, where (a) shows a state where the pillar trim is attached to the pillar portion, and (b) shows a state where the airbag is inflated and the pillar trim is moved toward the vehicle interior. FIG. 3 is a view corresponding to FIG. 2 according to Embodiment 2 of the present invention. FIG. 4 is a view corresponding to FIG. 3 according to Embodiment 2 of the present invention. It is a perspective view of the attachment seat, protrusion part, and extension protrusion part which were formed in the pillar trim back surface concerning Embodiment 2 of this invention. FIG. 5 is a view corresponding to FIG. 4 according to Embodiment 2 of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Embodiment 1 of the Invention
FIG. 1 shows an interior 1 of an automobile C to which a pillar trim mounting structure according to Embodiment 1 of the present invention is applied. A resin pillar trim (A pillar trim) 3 extending in the vertical direction so that the upper end of the vehicle body pillar portion P (hereinafter referred to as the pillar portion P) in front of the front side window 2 in the vehicle body side portion of the vehicle interior 1 is inclined rearward of the vehicle body. Is arranged. As shown in FIG. 4, the pillar trim 3 includes an airbag disposed in the pillar portion P by inserting the protruding portion 7 of the pillar trim 3 into the grommet 9 fitted in the fitting hole H of the pillar portion P. It is attached so that Ab may be covered from the vehicle interior 1 side. The pillar trim 3 has a plate-like trim body 3b whose width direction is curved so as to bulge toward the vehicle interior 1, and a mounting seat 5 is provided at the center in the width direction of the rear surface on the upper end side in the longitudinal direction of the trim body 3b. Are projecting together. A plurality of ribs 3a extending in the width direction are provided on the rear surface of the trim main body 3b so as to project substantially in parallel in the longitudinal direction. The airbag Ab is disposed along the longitudinal direction of the pillar trim 3 in the width direction of the mounting seat 5 (side window 2 side).

  As shown in FIGS. 2 to 5, the mounting seat 5 is spaced apart in the width direction in the vicinity of the upper end in the longitudinal direction of the trim body 3 b, and integrally protrudes to the pillar portion P side along the longitudinal direction of the trim body 3 b. A pair of plate-like first leg portions 51a and a plate-like seat portion 53 that integrally connects projecting ends of the first leg portions 51a are formed in a substantially gate shape. Further, the mounting seat 5 has a plate-like second leg portion 51b integrally with the pair of first leg portions 51a, the seating portion 53 and the trim body 3b so as to close the opening at the lower end in the longitudinal direction of the trim body 3b. A long hole 51c is formed in the substantially central portion of the plate surface of the second leg 51b as a locked portion extending in the protruding direction of the mounting seat 5. The pair of first leg portions 51a, the seat portion 53, and the trim body 3b form a first space portion S1, and the mounting seat 5 is disposed on the upper side in the longitudinal direction of the trim body 3b of the first space portion S1. A first opening 55 is formed so as to be substantially perpendicular to the protruding direction of the first opening 55.

  The seat portion 53 is provided with a substantially gate-shaped projecting portion 7 integrally projecting in the projecting direction of the mounting seat 5. The protrusions 7 are spaced apart from each other in the width direction of the trim body 3b and are integrally protruded in the protrusion direction of the mounting seat 5 so as to be along the longitudinal direction of the trim body 3b. And a non-flexible thick-walled bridging portion 76 that integrally connects the protruding ends of the side wall portion 71 to each other. The bridging portion 76 is formed with four tapered surfaces 76a so that the front end side in the protruding direction is narrowed so that the protruding portion 7 can be easily inserted into the insertion hole 93 formed in the grommet 9. A second space S2 is formed by the pair of side wall portions 71, the bridging portion 76 and the seating portion 53, and the second space portion S2 has the same direction as the opening direction of the first opening 55. A second opening 79 is formed.

  A pair of substantially U-shaped engaging portions 73 bulging in a direction away from each other are integrally formed on the outer surface of the intermediate portion in the protruding direction of the pair of side wall portions 71, that is, the outer surface in the width direction of the trim body 3b. Is formed. The engaging portion 73 has a substantially triangular shape in which the width in the protruding direction of the protruding portion 7 gradually decreases as it goes away from the engaging portion 73, and the guide surface 73a is formed on the leading end side of the protruding portion 7 in the protruding direction with the apex as a boundary. However, an engagement surface 73b having an inclination angle larger than that of the guide surface 73a is formed on the base end side.

  Further, a plate-like reinforcing portion 78 that reinforces the protruding portion 7 is provided between the side wall portions 71, and the reinforcing portion 78 is a central portion in the width direction of the trim main body 3 b between the pair of side wall portions 71. In the projecting direction, and the distal end side is integrally connected to the distal end sides of the bridge portion 76 and the side wall portions 71 and the proximal end side is integrally connected to the proximal end sides of the seating portion 53 and the side wall portions 71. Is formed. Further, the reinforcing portion 78 is formed so that the plate surface on the lower side in the longitudinal direction of the trim body 3b is flush with the lower side in the longitudinal direction of the trim body 3b of the side wall portion 71 and the plate on the upper side in the longitudinal direction of the trim body 3b. The surface is formed closer to the lower side in the longitudinal direction than the central portion in the longitudinal direction of the trim main body 3 b of the side wall portion 71. Further, the second space S2 of the projecting portion 7 is formed in the longitudinal direction of the trim body 3b by a pair of rectangular communication holes 80 formed on the lower side in the longitudinal direction of the trim body 3b by the reinforcing portion 78 and the pair of side wall portions 71. The lower side is formed open. By forming the communication hole 80, the pair of side wall portions 71 can be easily bent in a direction approaching or separating from each other. Further, by forming the reinforcing portion 78, particularly when the protruding portion 7 is inserted into the insertion hole 93 of the grommet 9, the protruding portion 7 can be inserted without buckling in the anti-insertion direction, and the pillar trim 3 is attached to the pillar portion P. In this state, the engaging portion 73 can be stably attached without being easily removed from the engaged portion 97b. The plate surface on the upper side in the longitudinal direction of the trim main body 3 b of the reinforcing portion 78 may be extended so as to be flush with the second opening 79.

  Thus, the undercut part is not formed in the reinforcement body 78 of the said protrusion part 7 in the longitudinal direction lower side of the trim main body 3b. Therefore, when forming the mounting seat 5 and the protruding portion 7, the mounting seat 5 having the first space portion S1 and the protruding portion having the second space portion S2 using one slide mold that slides in the longitudinal direction of the trim body 3b. The part 7 can be molded.

  That is, the one slide type forms the outer surface of the seat body 53 of the mounting seat 5 and the trim body 3b in the width direction of the protruding portion 7, and the first space S1 and the long hole 51c of the mounting seat 5 and the protruding portion 7. The second space portion S2 and the communication hole 80 are also formed. The outer surfaces of the mounting seat 5 and the protrusion 7 on the lower side in the longitudinal direction of the trim main body 3b are formed by a movable mold that forms the back side (surface in the vehicle outer direction) of the trim main body 3b and the surface of the trim main body 3b ( The surface on the vehicle interior 1 side) is formed by a fixed mold.

  As shown in FIGS. 2, 3 and 5, the grommet 9 is formed by integrally molding a resin material and has a substantially rectangular plate-shaped base portion 91. A substantially rectangular insertion hole 93 into which the protrusion 7 of the pillar trim 3 is inserted is formed in the center of the base 91 (see FIGS. 4 and 5), and the trim body 3b in the width direction of the insertion hole 93 is formed. A pair of plate-like first engaging walls 95 project toward the pillar portion P side along the trim body 3b width direction, and the trim body 3b longitudinal periphery of the insertion hole 93 The pair of plate-like second engagement walls 97 projecting toward the pillar portion P side so as to be integrally connected to the pair of first engagement walls 95 and along the longitudinal direction of the trim body 3b. The first engaging wall 95 and the second engaging wall 97 form a rectangular cylindrical portion 9a whose protruding end is open. In order to make it easier to insert the tubular portion 9a of the grommet 9 into the fitting hole H of the pillar portion P from the vehicle interior 1 side on the outer surface on the front end side of the first engagement wall 95 and the second engagement wall 97, Tapered surfaces 95a and 97a are formed so that the tips are narrowed. Then, on the proximal end sides of the pair of first engaging walls 95, the locking claws 95c projecting outward from each other are bent so as to be close to each other with the distal end side of the cylindrical portion 9a as a support shaft. Is formed so as to be surrounded by a U-shaped slit 95b. The locking claw 95c facilitates the insertion of the pillar portion P into the fitting hole H, and after the cylindrical portion 9a is inserted into the fitting hole H, the cylindrical portion 9a, That is, the grommet 9 is formed so as not to be removed from the fitting hole H to the vehicle interior 1 side. In addition, a rectangular hole-like engaged portion 97b through which the engaging portion 73 of the projecting portion 7 is detachably engaged is formed on the proximal end side of the second engaging walls 97.

  One end of an extensible strip-like connecting member 94 is integrally connected to one side of the base portion 91 on the lower side in the longitudinal direction of the trim main body 3b. The connecting member 94 is formed of the same kind of resin material as that of the grommet 9 and is folded in the middle to be loosened, and a rectangular plate-like engaging portion 92 is bulged at the other end. . The locking portion 92 is formed so that its longitudinal direction is orthogonal to the extending direction of the connecting member 94, that is, the other end of the connecting member 94 is substantially perpendicular to one plate surface of the locking portion 92. The length of the locking portion 92 in the longitudinal direction is set longer than the short diameter of the long hole 51c and shorter than the long diameter of the long hole 51c. In addition, the length of the locking portion 92 in the width direction (short side) is set to be shorter than the short diameter of the long hole 51c. In the state in which the protruding portion 7 is inserted into the insertion hole 93 of the grommet 9, the locking portion 92 of the connecting member 94 has its longitudinal direction facing the short diameter direction of the long hole 51c, that is, the locking portion 92. The longitudinal direction and the longitudinal direction of the long hole 51c are substantially orthogonal to each other, and the locking portion 92 is configured not to be removed from the long hole 51c.

  Although the connecting member 94 is formed integrally with the grommet 9, it is formed as a separate member, and one end is connected to the grommet 9 and the other end is connected to the elongated hole 51c as a locked portion. May be. In this case, in a state where the pillar trim 3 is attached to the pillar portion P, the both ends of the connecting member are connected so as not to be detached from the grommet 9 and the long hole 51c.

  Next, a procedure for attaching the pillar trim 3 to the pillar portion P will be described.

  First, the direction of the grommet 9 is changed so that the long side of the locking portion 92 of the connecting member 94 is along the long diameter side of the long hole 51c, and the locking portion 92 is inserted into the long hole 51c from the outside of the second leg portion 51b. After the insertion toward the inside, when the grommet 9 is rotated so that the long side of the locking part 92 faces the short diameter side of the long hole 51c, the locking part 92 is inside the long side of the long hole 51c (the first side). 1 space part S1 side) It is latched by an edge part.

  Next, the connecting member 94 is extended by holding the grommet 9, and the insertion hole 93 is inserted into the distal end of the protruding portion 7 so that the pair of engaged portions 97 b of the grommet 9 correspond to the pair of engaging portions 73 of the protruding portion 7. Then, the protrusion 7 is inserted into the insertion hole 93. At this time, both engaging portions 73 come into contact with the peripheral edge of the insertion hole 93, and the guide surface 73 a is slidably contacted with the peripheral edge of the insertion hole 93 by the insertion force, so that the side wall portions 71 come close to each other. After passing through the insertion hole 93, the side wall portion 71 is restored, and the engaging surface 73b of the engaging portion 73 is located at the proximal end side edge portion of the cylindrical portion 9a in the engaged portion 97b. The engaging portion 73 and the engaged portion 97b engage with each other. At this time, the connecting member 94 is in a slack state as shown in FIG.

  Next, when the grommet 9 attached to the protruding portion 7 of the pillar trim 3 is inserted into the fitting hole H of the pillar portion P from the vehicle interior 1 side, the grommet 9 is guided to be inserted into the fitting hole H by the tapered surfaces 95a and 97a. When the grommet 9 is further inserted, the locking claws 95c contacting the periphery of the fitting hole H bend so as to approach each other by the insertion force, pass through the fitting hole H, and then restored and fitted from the outside. Lock to the periphery of the hole H. As a result, as shown in FIG. 5 (a), the grommet 9 holds the periphery of the fitting hole H of the pillar portion P between the base portion 91 and the locking claw 95c with the pillar trim 3 attached. It is fitted from the hole H so as not to move in and out of the vehicle. Thereby, the pillar trim 3 is attached to the pillar part P through the grommet 9.

  The connecting member 94 is attached to the long hole 51c of the engaging part 92 so that the longitudinal direction of the engaging part 92 is along the long side of the long hole 51c after the grommet 9 is attached to the protruding part 7. By holding the hand and twisting the connecting member 94, the engaging portion 92 is inserted and penetrated into the long hole 51c, and then the elastic force of the connecting member 94 is restored by releasing the twisting force. You may make it engage with the hole 51c.

  Thus, in a state where the pillar trim 3 is attached to the pillar portion P (see FIGS. 4A and 5A), the airbag Ab is inflated at the time of a vehicle body side collision (hereinafter referred to as a collision), and the inflation pressure is increased. Acts on the rear surface of the trim body 3b, an acting force is exerted to move the grommet 9 to the vehicle interior 1 side via the engaging surface 73b of the protruding portion 7, but the grommet 9 is separated from the pillar portion by the locking claw 95c. Since it is attached to the fitting hole H of P so as not to move to the vehicle interior 1 side, it does not move to the vehicle interior 1 side with the expansion pressure. Therefore, in a state where the grommet 9 is fitted in the fitting hole H, the both side wall portions 71 while the engaging surface 73b of the engaging portion 73 detachably fitted is in sliding contact with the engaged portion 97b. It bends so that they are close to each other. Then, the bridging portion 76 of the engaging portion 73 passes through the engaged portion 97b toward the vehicle interior 1 side, so that the engaging portion 73 is detached from the engaged portion 97b and the protruding portion 7 passes through the insertion hole 93. As a result, the pillar trim 3 moves to the vehicle interior 1 side, and the airbag Ab bulges between the pillar trim 3 and the pillar portion P to the vehicle interior 1 side. At this time, the connecting member 94 expands with the movement of the pillar trim 3, and the pillar trim 3 is separated and held by the pillar portion P by the connecting member 94 as shown in FIGS. 4B and 5B. As described above, when the airbag Ab is inflated, the pillar trim 3 moves to the vehicle interior 1 side due to the inflation pressure, the protrusion 7 is detached from the grommet 9, and the connecting member 94 of the grommet 9 is extended, so that the pillar trim 3 extends to the pillar portion. P is held apart. Therefore, the pillar trim 3 is prevented from being scattered in the vehicle interior 1 due to the inflation pressure of the airbag Ab, and passenger safety can be ensured.

  As described above, according to the first embodiment, even when the engaging portion 73 that bulges in the width direction of the trim body 3b is formed on the protruding portion 7, the first opening in the first space S1 of the mounting seat 5 is achieved. One slide that slides in the longitudinal direction of the trim body 3b in forming the pillar trim 3 by forming the opening 55 and the second opening 79 in the second space S2 of the protrusion 7 so as to be in the same opening direction. Since the mounting seat 5 having the first space portion S1 and the projecting portion 7 having the second space portion S2 can be formed using a mold, the structure of the forming die for forming the pillar trim 3 is simplified, and as a result, the pillar trim 3 Can be formed at low cost.

  When the pillar trim 3 is moved to the vehicle interior 1 side by the inflation pressure of the airbag Ab, most of the inflation pressure is applied to the mounting seat 5 in the pillar trim 3 connected to the grommet 9 and the connecting member 94 of the grommet 9. Since it is applied to the second leg portion 51b having the long hole 51c, the airbag Ab inflating pressure is not directly applied to the projecting portion 7, and the shape of the projecting portion 7 does not need to be large enough to withstand the inflating pressure. it can. That is, the projecting portion 7 can be formed into a compact shape having a necessary minimum strength capable of attaching and holding the pillar trim 3 to the pillar portion P.

  In the first embodiment, the locking portion 92 of the connecting member 94 is locked to the elongated hole 51c of the mounting seat 5, and the protruding portion 7 of the pillar trim 3 is inserted into the insertion hole 93 of the grommet 9, and then the pillar portion P The grommet 9 is fitted into the fitting hole H. After the grommet 9 is fitted into the fitting hole H of the pillar part P, the locking part 92 is locked to the long hole 51c, and then the pillar trim 3 protrudes. The pillar trim 3 may be attached to the pillar portion P by inserting the portion 7 into the insertion hole 93 of the grommet 9.

In the first embodiment, the long hole 51 c as the locked portion is formed in the first leg portion 51 a of the mounting seat 5, but the long hole 51 c may be formed in a portion other than the mounting seat 5. For example, a gate-shaped connecting member dedicated mounting seat is newly formed on the back surface of the trim body 3b on the side of the pillar trim 3 in the width direction of the mounting seat 5, and a long hole 51c is formed on the upper surface of the connecting member dedicated mounting seat. . At this time, the connecting member dedicated mounting seat forms the opening in the same direction as the opening direction of the first opening and the second opening, so that the mounting seat 5, the projecting portion 7 and the connecting member dedicated mounting seat are 1 Form with two slide molds.
<< Embodiment 2 of the Invention >>
6 to 9 show the mounting structure of the pillar trim 3 according to the second embodiment of the present invention. In the second embodiment, the protrusion 7 and the grommet 9 are different in shape, the extended protrusion 70 is provided on the tip side of the protrusion 7, and the elongated hole 51 c is formed in the mounting seat 5. Only the points that are different from the first embodiment are the same as the first embodiment, and the other portions are the same. Therefore, only the different portions will be described in detail below.

  The projecting portion 7 is formed with a rectangular thin-walled bridging portion 76 that integrally couples the projecting ends of the side wall portion 71 to each other. The pair of side wall portions 71, the bridging portion 76, and the seating portion 53 of the mounting seat 5 Two space portions S2 are formed. Between the pair of both side wall portions 71, the bridging portion 76 extends from the center portion in the width direction of the trim main body 3 b to the seating portion 53 side in the projecting direction of the projecting portion 7, and the seating portion 53 and the both side wall portions 71. A substantially T-shaped plate-shaped reinforcing portion 78 connected to the base end side is formed.

  The bridging portion 76 and the reinforcing portion 78 are formed such that the plate surface on the lower side in the longitudinal direction of the trim body 3b is flush with the lower side in the longitudinal direction of the trim body 3b of the side wall portion 71 and the upper side in the longitudinal direction of the trim body 3b. This plate surface is formed closer to the lower side in the longitudinal direction than the central portion in the longitudinal direction of the trim main body 3b of the side wall portion 71. Further, the second space S2 of the projecting portion 7 has a trim main body 3b formed by a pair of rectangular communication holes 80 formed on the lower side in the longitudinal direction of the trim main body 3b by the reinforcing portion 78, the pair of side wall portions 71 and the bridging portion 76. The lower side in the longitudinal direction is open. By forming the communication hole 80, the pair of side wall portions 71 can be easily bent in a direction approaching or separating from each other. Further, by forming the reinforcing portion 78, particularly when the protruding portion 7 is inserted into the insertion hole 93 of the grommet 9, the protruding portion 7 can be inserted without buckling in the anti-insertion direction, and the pillar trim 3 is attached to the pillar portion P. In this state, the engaging portion 73 can be stably attached without being easily removed from the engaged portion 97c of the second engaging wall 97 in the grommet 9. The plate surface on the upper side in the longitudinal direction of the trim main body 3 b of the reinforcing portion 78 may be extended so as to be flush with the second opening 79.

  Thus, the undercut part is not formed in the bridge | crosslinking part 76 and the reinforcement part 78 in the trim main body 3b longitudinal direction lower side.

  On the distal end side of the projecting portion 7, an arrow-shaped extended projecting portion 70 is integrally projected toward the pillar portion P, that is, along the projecting direction of the projecting portion 7. The extension protrusion 70 includes a pair of flexible plate-like extension side walls 72 formed by extending the side walls 71, and an insertion part for integrally connecting the extension ends of the extension side walls 72 to each other. 75. The insertion portion 75 has a substantially triangular shape in which the width direction of the trim body 3b becomes narrower toward the distal end side, and a pair of guide surfaces 75a are inclined with respect to the apex. The insertion portion 75 is provided with a flange portion 75 b that protrudes in a direction away from each other on the distal end side outer surface of each extension side wall portion 72, and the flange portion 75 b intersects with the extension side wall portion 72. A locking surface 75c is formed on the surface.

  A third space S3 is formed by the pair of extended side wall portions 72, the insertion portion 75, and the bridging portion 76, and the first opening 55 and the second opening 79 are opened in the third space S3. A third opening 74 is formed in the same direction as the direction. The third space S3 is formed to extend to the middle in the projecting direction of the insertion portion 75, that is, to the front end side in the projecting direction of the extended projecting portion 70 from the pair of flange portions 75b. Is inserted into the insertion hole 93 of the grommet 9 so that the flanges 75b approach each other to facilitate insertion.

  Between the pair of extended side wall portions 72, there is a plate-like extension reinforcing portion 77 extending along the extending direction of the extending protrusion 70 from the center portion in the width direction of the trim main body 3b of the bridging portion 76 to the insertion portion 75. Is formed.

  The plate surface on the lower side in the longitudinal direction of the trim main body 3b of the extended reinforcing portion 77 is formed to be flush with the lower side in the longitudinal direction of the trim main body 3b of the side wall portion 71, the reinforcing portion 78 and the extended side wall portion 72. At the same time, the plate surface on the upper side in the longitudinal direction of the trim main body 3b is formed closer to the lower side in the longitudinal direction than the central portion in the longitudinal direction of the trim main body 3b of the extended side wall portion 72. The third space S3 of the extension protrusion 70 has a pair of rectangular shapes formed by the extension reinforcing portion 77, the pair of extension side wall portions 72, the bridge portion 76, and the insertion portion 75 on the lower side in the longitudinal direction of the trim body 3b. The lower side of the trim main body 3b in the longitudinal direction is opened from the extended communication hole 82. By forming the extended communication hole 82, the pair of extended side wall portions 72 and the flange portion 75b can be easily bent in a direction approaching or separating from each other. Further, by forming the extension reinforcing portion 77, particularly when the extension protrusion 70 is inserted into the insertion hole 93 of the grommet 9, the extension protrusion 70 can be inserted without buckling in the anti-insertion direction. Further, when the airbag Ab is deployed, the locking surface 75c of the flange portion 75b is locked from the vehicle outer side to the engaged portion 97c of the second engagement wall 97 of the grommet 9 to hold the pillar trim 3 apart. The flange 75b is not deformed or damaged by the inflation pressure of the airbag Ab, and stable separation and holding can be performed.

  Thus, the undercut part is not formed in the extension reinforcement part 77 of the said extension protrusion part 70 in the longitudinal direction lower side of the trim main body 3b. Therefore, when the mounting seat 5, the projecting portion 7, and the extended projecting portion 70 are formed, the engaging portion 73 and the flange portion 75b that bulge in the width direction of the trim body 3b are formed on the projecting portion 7 and the extended projecting portion 70. However, using one slide mold that slides in the longitudinal direction of the trim body 3b, the mounting seat 5 having the first space portion S1, the protruding portion 7 having the second space portion S2, and the extended protrusion having the third space portion S3. The part 70 can be molded.

  That is, the one slide type includes the seating portion 53 of the mounting seat 5, the pair of side wall portions 71 of the projecting portion 7, the pair of extended side wall portions 72 of the extension projecting portion 70, and the outer surface of the trim main body 3 b in the width direction. The first space S1 of the mounting seat 5, the second space S2 and the communication hole 80 of the protrusion 7, and the third space S3 and the extension communication hole 82 of the extended protrusion 70 are also formed. In addition, each outer surface of the trim body 3b in the longitudinal direction of the mounting seat 5, the projecting portion 7, the extended projecting portion 70, and the insertion portion 75 is formed by a movable mold for molding the back side (surface in the vehicle outer direction) of the trim body 3b. In addition, the surface of the trim body 3b (the surface on the vehicle interior 1 side) is formed by a fixed mold.

  As shown in FIGS. 6, 7, and 9, the grommet 9 has a pair of first engagement walls 95 and a pair of second engagement walls 97 that are shorter in the protruding direction than in the first embodiment. . A tapered surface 95a is formed on the outer surface of the pair of first engaging walls 95 on the tip side so as to be tapered toward the tip. The pair of second engagement walls 97 are integrally connected to the base end side of the first engagement wall 95, and the protruding end surfaces form the engaged portions 97c and the grommets 9 are connected. It is formed so as to be substantially flush with the outer surface (surface in the vehicle outer direction) of the pillar portion P when attached to the pillar portion P. Therefore, a space portion S4 is formed on the protruding front end side of the second engagement wall 97, in which the width direction of the trim main body 3b and the vehicle outer side (the pillar portion P side) are opened by the pair of first engagement walls 95. Yes.

  Next, a procedure for attaching the pillar trim 3 to the pillar portion P will be described.

  First, as shown in FIG. 7, the grommet 9 is aligned with the insertion portion 75 of the protruding portion 7 so that the juxtaposed direction of the pair of first engaging walls 95 of the grommet 9 is along the width direction of the pillar trim 3. The insertion portion 75 is inserted into the insertion hole 93 (see FIG. 9) of the grommet 9 from the pillar trim 3 side. At this time, both guide surfaces 75a are brought into contact with the periphery of the insertion hole 93, and the guide surfaces 75a are brought close to each other and the extended side wall portions 72 are also brought close to each other by the insertion force. In close proximity, the flange 75b passes through the insertion hole 93 in the insertion direction. Further, when the protruding portion 7 is inserted into the grommet 9 and the insertion hole 93 of the grommet 9 approaches the distal end side of the engaging portion 73, the side wall portion 71 while the guide surface 73 a is in sliding contact with the periphery of the insertion hole 93 by the insertion force. The side wall portion 71 where the apex of the engaging portion 73 (the portion bulging outward in the width direction of the trim main body 3b) passes through the insertion hole 93 is restored by being bent so as to be close to each other, and the engaging portion 73 is restored. The engaging surface 73b comes into contact with the leading end edge of the second engaging wall 97 of the grommet 9 from the leading end side, whereby the engaging portion 73 and the second engaging wall 97 are engaged (FIG. 9A). reference).

  Next, when the extended projection 70 of the projection 7 attached to the proximal end side of the projection 7 is inserted into the fitting hole H of the pillar portion P from the vehicle interior 1 side, the insertion portion 75 in the extension projection 70 is inserted. The base end sides of the grommet 9 are bent so as to be close to each other, and after passing through the fitting hole H in the insertion direction, the grommet 9 is guided to be inserted into the fitting hole H by the tapered surface 95a. When the grommet 9 is further inserted in the vehicle outward direction from the vehicle interior 1 side, a pair of locking claws 95c are brought into pressure contact with the periphery of the fitting hole H, and the locking claws 95c are bent so as to be close to each other by the insertion force, and the above fitting After passing through the hole H, it is restored and locked to the periphery of the hole H from the outside of the vehicle (see FIGS. 6 and 9A). Thus, as in the first embodiment, the grommet 9 holds the pillar portion P between the base portion 91 and the locking claw 95c and is fitted in the fitting hole H of the pillar portion P so as not to be movable inward and outward in the vehicle. On the other hand, the protrusion 7 is inserted into the insertion hole 93 of the grommet 9 from the vehicle interior 1 side, and the engaging portion 73 of the protrusion 7 is engaged with the engaged portion 97c of the second engaging wall 97 of the grommet 9. Engage with.

  Thus, in a state where the pillar trim 3 is attached to the pillar portion P (see FIG. 9A), when the vehicle body side portion collides, the airbag Ab is inflated, and the inflation pressure acts on the back surface of the trim body 3b. Then, in a state where the grommet 9 is fitted in the fitting hole H of the pillar portion P, the side wall portions 71 are connected to each other while the engagement surface 73b of the engagement portion 73 is in sliding contact with the second engagement wall 97. Bends close to each other. Then, when the apex of the engagement portion 73 passes through the second engagement wall 97 to the vehicle interior 1 side, the engagement portion 73 disengages from the second engagement wall 97 and moves through the insertion hole 93 to the vehicle interior 1 side. Subsequently, the extension protrusion 70 moves in the insertion hole 93 to the vehicle interior 1 side. Then, as shown in FIG. 9B, the locking surface 75c of the flange portion 75b of the insertion portion 75 is locked to the engaged portion 97c of the second engagement wall 97 of the grommet 9 from the outside of the vehicle. 3 is separated and held by the pillar part P, and the airbag Ab bulges toward the vehicle interior 1 side. Therefore, the pillar trim 3 is prevented from being scattered in the vehicle interior 1 due to the inflation pressure of the airbag Ab, and passenger safety can be ensured.

  As described above, according to the second embodiment, the same effect as that of the first embodiment can be obtained, and when the pillar trim 3 is attached to the pillar portion P, the extended protrusion extending from the rear surface of the trim body 3b toward the pillar portion P. 70 and the projecting portion 7 are inserted into the insertion hole 93 of the grommet 9 and then the grommet 9 only needs to be fitted into the fitting hole H of the pillar portion P. Therefore, the mounting work of the pillar trim 3 is extremely simple and easy. .

  Further, by forming the third opening 74 of the extended protrusion 70 so as to be in the same opening direction as the first opening 55 of the mounting seat 5 and the second opening 79 of the protrusion 7, the pillar trim 3 can be formed. Since the mounting seat 5 having the first space portion S1, the protruding portion 7 having the second space portion S2, and the extended protrusion portion 70 having the third space portion S3 can be formed using one slide mold, the extended protruding portion. Even with the pillar trim 3 having a spacing and holding structure such as 70, the structure of the mold is simplified, and as a result, the pillar trim can be molded at low cost.

  In the second embodiment, the grommet 9 is fitted into the fitting hole H of the pillar portion P after the grommet 9 is attached to the protruding portion 7 of the pillar trim 3, but the grommet 9 is fitted into the fitting hole H of the pillar portion P. After fitting, the protrusion 7 of the pillar trim 3 may be inserted and attached to the grommet 9.

  Moreover, although the example which applied this invention to the pillar trim 3 by the side of a windshield was shown in the said Embodiment 1, 2, this invention is applicable also to other pillar trims, such as a center pillar trim and a rear pillar trim.

  The present invention is suitable for, for example, a pillar trim mounting structure of a pillar portion of a vehicle equipped with an airbag as a safety measure at the time of a side collision.

DESCRIPTION OF SYMBOLS 1 Car interior 3 Pillar trim 3a Trim main body 5 Mounting seat 7 Protrusion part 9 Grommet 51a 1st leg part 51c Long hole (locked part)
53 Seating Part 55 First Opening Port 70 Extended Protruding Portion 71 Side Wall Part 72 Extended Side Wall Part 73 Engaging Part 75 Inserting Part 75b Brim Part 76 Bridging Part 79 Second Opening Port 93 Inserting Hole 94 Connecting Member 97b Engaged Part 97c Covered Engaging portion H Fitting hole Ab Air bag P Pillar portion S1 First space portion S2 Second space portion S3 Third space portion

Claims (3)

It is attached to the pillar part so as to cover the airbag arranged in the pillar part of the vehicle body from the inside of the vehicle, and the airbag is inflated into the vehicle by moving to the inside of the vehicle by the inflation pressure of the airbag at the time of the vehicle body side collision A resin pillar trim mounting structure configured to
On the rear surface of the trim body of the pillar trim, a pair of plate-like leg portions that are spaced apart from each other and integrally project toward the pillar portion side, and a plate-like seating portion that integrally connects the projecting ends of the leg portions to each other, And a pair of leg portions, a seat portion, and a pillar trim main body form a first space portion, and the first space portion protrudes from the mounting seat. A first opening is formed so as to be substantially orthogonal to the direction;
The seating portion includes a pair of flexible plate-like side wall portions that are separated from each other and integrally project in a direction in which the mounting seat projects, and a bridging portion that integrally connects the projecting ends of the side wall portions to each other. The projecting portion provided is formed, while the second space portion is formed by the pair of side wall portions, the bridging portion, and the seating portion, and the second space portion has the same direction as the opening direction of the first opening. A second opening is formed on the outer surface of the intermediate portion in the protruding direction of the pair of side wall portions, and an engaging portion that bulges away from each other is formed.
The pillar portion is formed with a fitting hole into which the grommet is fitted,
The grommet is formed with an insertion hole into which the protruding portion is inserted, and an engaged portion with which the engaging portion is detachably engaged,
When the pillar trim is attached, the grommet is fitted into the fitting hole of the pillar portion so as not to move inward and outward of the vehicle, while the protruding portion is inserted into the insertion hole of the grommet from the inside of the vehicle, The engaging part is engaged with the engaged part of the grommet,
When the airbag is inflated, the inflation pressure of the airbag acts on the back surface of the pillar trim body and the side walls are bent so that the side walls are close to each other, so that the engaging part is detached from the engaged part and the protruding part is inserted. A structure for mounting a pillar trim, wherein the pillar trim is configured to move to the vehicle inner side by moving the hole to the vehicle inner side. The pillar trim mounting structure according to claim 1,
The grommet is connected to the locked portion of the pillar trim body via an extendable connecting member,
When the airbag is inflated, the inflation pressure of the airbag acts on the back surface of the pillar trim body and the side walls are bent so that the side walls are close to each other, so that the engaging part is detached from the engaged part and the protruding part is inserted. The pillar trim is moved to the inside of the vehicle through the hole and the connecting member is extended so that the pillar trim is separated and held by the connecting member by the connecting member. Pillar trim mounting structure. The pillar trim mounting structure according to claim 1,
An extension protrusion including a pair of flexible extension side walls extending each side wall and an insertion part for integrally connecting the extension ends of the extension side walls to each other is provided on the distal end side of the protrusion. On the other hand, a third space portion is formed by the pair of extended side wall portions, the insertion portion, and the bridge portion, and the third space portion has the same opening direction as the first opening and the second opening. A third opening is formed in the direction,
The insertion portion is provided with a flange portion protruding in a direction away from the outer side surface of the distal end side of each extended side wall portion,
When the pillar trim is attached, the grommet is fitted into the fitting hole of the pillar portion so as not to move inward and outward of the vehicle, while the insertion portion is inserted into the insertion hole of the grommet from the inside of the vehicle and The engaging part is engaged with the engaged part of the grommet,
When the airbag is inflated, the inflating pressure of the airbag acts on the back surface of the pillar trim main body and bends so that the side wall portions are close to each other. The extension protrusion moves to the inside of the insertion hole and moves toward the inside of the vehicle so that the flange is locked to the engaged portion from the outside of the vehicle, and the pillar trim is separated and held by the pillar. A structure for mounting a pillar trim characterized by being constructed.

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