JP2002067856A - Mounting structure of airbag incorporated pillar garnish - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of an airbag incorporated pillar garnish, wherein the pillar garnish has an excellent appearance and a simple structure, it does not easily come off and it is not easily broken when the airbag is inflatedly expanded. SOLUTION: A stationary locking part 30 is composed of a leg 31 and a claw 35, and a clip 40 comprises a bent part composed of a center bent part 41 and an outside piece 42 while having an almost W-shaped cross section. A claw locking hole 47 and an outward hooked part 45 are formed on the outside piece, and an externally inflated part 43 is curvedly formed. A hole diameter (a) perpendicular to the leg of the stationary locking part in a locking hole 25 for the pillar garnish of an inner panel 21, a distance (b) between the claw tips of the stationary locking part, and the maximum separated distance (c) between the externally inflated parts 43 of the clip have the following relation: a<b, a<c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pillar garnish mounted on a front pillar portion of an automobile, and more particularly to a mounting structure of a pillar garnish incorporating an airbag.

[0002]

2. Description of the Related Art In recent years, in order to protect an occupant even in the event of a side collision of a vehicle, a pillar garnish 80 attached to a pillar portion 95 of a vehicle body as shown in FIGS.
The airbag A is also housed on the back side of the airbag. In this case, the airbag A is inflated by the side collision, and the inflated airbag A pushes and bends the pillar garnish 80 toward the vehicle interior, so that the vehicle body pillar portion 95 and the pillar garnish 80 are inflated.
A gap for passing the airbag A is formed between the occupant head T and the side glass G through the gap.
The occupant's head T is protected by deploying like a chain line Bo. Reference symbol I in the figure is an inflator, and P is an instrument panel.

Incidentally, in the pillar garnish 80 with a built-in airbag, it is necessary to prevent the pillar garnish 80 from coming off the vehicle body pillar portion 95 and scattering when the airbag A is inflated. Therefore, a structure has been proposed in which the widthwise middle portion of the pillar garnish 80 is securely locked to the vehicle body pillar portion 95 by a rod-shaped fixing member such as a bolt.

Further, in order to prevent the head of the fixing member from being exposed on the design surface of the pillar garnish, that is, the surface on the interior side of the vehicle interior, and to impair the aesthetic appearance, as shown in FIG. In addition, it is conceivable to form a fixing member holding portion 81 projecting to the back side of the pillar garnish 80 at the time of injection molding, and embed and fix a head 86 at one end of the fixing member 85 to the fixing member holding portion 81 by insert molding. Have been. An enlarged locking portion 88 is formed at the other end of the shaft portion 87 of the fixing member 85. In the drawing, reference numeral 91 denotes an inner panel of a vehicle, 96 denotes a locking hole formed in the inner panel 91, F denotes a windshield, C denotes a wiring from an engine room, 101 denotes an opening trim, 102 denotes a glass run channel, and 103 denotes a body. Indicates a frame.

However, in the structure shown in FIG. 12, since the fixing member 85 is integrally embedded and fixed in the holding portion 81 for the fixing portion by insert molding, the molding process can be prevented from being complicated. Absent. Further, by integrally molding the metal fixing member 85 with the plastic pillar garnish 80, there is a problem that recyclability is poor.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a good appearance of a pillar garnish, has a simple structure, and prevents the pillar garnish from coming off when the airbag is inflated and deployed. An object of the present invention is to provide a mounting structure of a pillar garnish with a built-in airbag which is less likely to be broken.

[0007]

In other words, the invention of claim 1 is to provide a pillar garnish of an inner panel of a vehicle together with a clip which is fixed to the scattering prevention fixed projection which is provided on the back surface of the pillar garnish. The pillar garnish is attached to the inner panel by being inserted and locked in the locking hole for use, and when the pillar garnish is pushed into the vehicle interior by the pressure at the time of inflation of the airbag, the pillar garnish is detached from the inner panel and scattered. In the mounting structure of an airbag built-in type pillar garnish for preventing the fixed locking portion from engaging with the locking hole, the fixed locking portion has two substantially parallel legs and a tapered portion formed outside the leg. The clip is inserted between the legs, and the leg is sandwiched between the central bent portion and the central bent portion that prevents the two legs from approaching each other. The outer piece is bent in a substantially W shape in cross section, and the outer piece has a hook hole for hooking the hook and a hook hole for pillar garnish of the inner panel. An outwardly hooked portion is formed to be locked on the inner side of the inner panel through the inner panel, and an outwardly bulging portion is formed between the hooked hole for claw and the outwardly hooked portion. A hole diameter a in a direction perpendicular to the legs of the fixed locking portion in the pillar garnish locking hole of the inner panel, and a distance b between claw tips of the fixed locking portion.
And a relationship between the maximum separation distance c between the outwardly bulging portions of the clip is a <b, a <c, wherein the pillar garnish has an airbag built-in type.

According to a second aspect of the present invention, there is provided the pillar garnish mounting structure with a built-in airbag according to the first aspect, wherein the two legs are constituted by a pair of opposed walls having a flat cylindrical portion. According to.

According to a third aspect of the present invention, a positioning projection is formed on an outer surface of the leg, and a positioning projection fitting portion for fitting the positioning projection is formed on an outer piece of the clip. Or a mounting structure for a pillar garnish with a built-in airbag according to 2.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a vehicle interior in which a pillar garnish with a built-in airbag is mounted by a mounting structure of the present invention, FIG. 2 is a cross-sectional view taken along line 2-2 of FIG.
3 is an enlarged cross-sectional view showing the vicinity of the fixed locking portion of FIG. 2, FIG. 4 is an enlarged perspective view showing the vicinity of the fixed locking portion with the clip removed, and FIG. 5 is another example of the fixed locking portion and the clip. 6, FIG. 6 is a sectional view taken along line 6-6 of FIG. 1, FIG. 7 is a perspective view showing the dimensional relationship between the locking holes of the inner panel and the clips and the like, and FIG. FIG. 9 is an enlarged cross-sectional view showing the state of the fixed locking portion when the airbag is deployed.

As shown in FIGS. 1 to 3, a pillar garnish 10 is attached to a vehicle body pillar 20 above an instrument panel P of an automobile with an airbag A folded on the back side. Cover the cabin interior. In the event of a car collision, gas is pressed into the airbag A by the operation of the inflator I installed near the instrument panel P, and the airbag A inflates sequentially from the instrument panel P side (the lower side of the pillar garnish 10). The side edge 12 of the pillar garnish 10 on the vehicle rear side 11 (that is, the side glass G side) is pushed and bent toward the vehicle interior, and the airbag is formed through the gap between the pushed and bent side edge 12 of the pillar garnish 10 and the vehicle body pillar portion 20. A is deployed inside the side glass G to protect mainly the occupant's head.

The pillar garnish 10 is formed by injection molding, and is formed of a resin cover body having a required length and having a curved cross-sectional shape which swells toward the vehicle interior, and has a width direction corresponding to the longitudinal direction of the vehicle. The rear surface of the vehicle rear side 11 (side glass G side) is a portion for accommodating the airbag A, and the rear surface of the vehicle front side 14 (that is, front glass F side) is a power cord C from the engine room. And so on.

The resin constituting the pillar garnish 10 is appropriately selected. However, the pillar garnish 10
Is usually a long part of 50 cm or more, so it is easy for dimensional changes to occur due to thermal expansion due to high vehicle interior temperature in summer, and at high temperatures, the strength near the mounting part to the pillar part due to softening of the resin There is a tendency to decrease. Further, in consideration of the place of use and the season of the vehicle, it is necessary to prevent the pillar garnish from being broken or scattered when the airbag is inflated in a range from a low temperature (−35 ° C.) to a high temperature (90 ° C.). It is necessary to make the resin appropriate hardness (softness) from the viewpoint of workability in mounting to the vehicle body pillar portion. From this point, as the resin constituting the pillar garnish, Izod impact strength (-35 ° C, JIS K
7110) is 196 Nm / m (20 kgcm / c)
m), the flexural modulus (JIS K7203) is 4.
Larger than 41 × 10 ³ MPa (4,500 kg / cm ² ), heat resistant deformation temperature (0.45 MPa (4.6 kg load), JIS K 7207) larger than 90 ° C., linear expansion coefficient (−35 ° C. to 90 ° C.) , ASTM D 696) is 1
TPO (polyolefin-based thermoplastic elastomer) smaller than 0 ° C. · cm / cm is particularly preferred.

The lower end of the pillar garnish 10 of this embodiment is inserted and fixed in a hole (not shown) formed in the instrument panel P, and the middle portion of the pillar garnish 10 is fixed.
Four mounting parts 15, 15, 16, along the longitudinal direction of
At 16, it is attached to the vehicle body pillar section 20. The intermediate mounting portions 15, 15, 16, 16 in this example include a mounting portion 15 for preventing the pillar garnish from coming off when the airbag A is inflated,
It consists of the rattling preventing attachment portions 16 in normal times, and the detachment preventing attachment portions 15 and the rattling prevention attachment portions 16 are arranged alternately in order from the lower side of the pillar garnish 10.

At the attachment portion 15 for prevention of detachment, a fixed locking portion 30 for preventing scattering is formed on the back surface of the pillar garnish 10, and the fixed locking portion 30 for preventing scattering is provided with a clip 4.
0 is attached and both are inserted and locked in the pillar garnish locking holes 25 of the inner panel 21.

The fixed locking portion 30 in this embodiment comprises two legs 31 and 31 which are substantially parallel, and a tapered claw 35 formed outside the tip of the leg 31. The thickness t of the base 32 of the leg 31 depends on the strength of the leg 31 itself and the pillar garnish 1
0.5 <t <1.5mm in consideration of sink to the design surface of 0
It is preferable to make the above.

The distance w between the legs 31, 31 is 1.
If the thickness is 5 mm or less, there arises a problem that the strength of a molding die during molding of the pillar garnish 10 cannot be obtained and a problem that it is difficult to form the central bent portion 41 described later of the clip 40 to be mounted. Conversely, the interval w is set to 1
If it is 0 mm or more, the center bent portion 41 of the clip 40 itself is easily bent, and the fitting between the leg 31 and the clip 40 is weak, and the clip 31 is easily released. For these reasons, 1.5 <w
<10 mm is preferred.

The width m of the leg 31 (shown in FIG. 4) need not be particularly limited, but the strength of the root 32 of the fixed locking portion 30 for preventing scattering is determined by the width m of the leg 31 times the width of the root 32. Since it is proportional to the area of the base portion 32 represented by the thickness t, the leg width m is determined in consideration of the tensile strength of the resin constituting the pillar garnish 10 and the like. Further, the legs 31, 31 of this embodiment are provided with reinforcing ribs 39 at the roots 32 thereof to prevent the legs 31 from falling down.

As shown in FIG. 4, the clip 40 is formed by forming a metal plate or the like into a predetermined shape.
A central bent portion 41 inserted between the two to prevent the two legs 31, 31 from approaching each other; and an outer piece 42 disposed outside the leg 31 so as to sandwich the leg 31 between the central bent portion 41 and the central bent portion 41.
42 is bent in a substantially W-shaped cross section. Further, the outer pieces 42, 42 pass through the claw engagement holes 47, which are engaged with and project from the claws 35, 35, and the pillar garnish engagement holes 25 of the inner panel 21. Outward hook-shaped parts 45, 45
Are formed, and an outer bulging portion 43 is formed between the hooking hole 47 for the claw and the outward hook-like portion 45 in a bent manner. The outward hooks 45 in this example are substantially L
It is bent in a letter shape.

The scatter-preventing fixed locking portion 30 is similar to that of the above-described embodiment, and a pair of flat cylindrical portions whose two legs 31A and 31A are flat like a pillar garnish 10A shown in FIG. It may be constituted by a wall. The opposite leg 31A and the side wall 3 orthogonal to the leg 31A
3A and 33A, the legs 3
1A and 31A do not easily fall down inside, and the engagement between the claw 35A and the engagement hole 25 for the pillar garnish of the inner panel becomes stronger.

Further, as shown in FIG.
Positioning projections 37A, 37A are formed on the outer surface of A,
On the other hand, positioning protrusion fitting portions 49A into which the positioning protrusions 37A fit are fitted to the outer pieces 42A, 42A of the clip 40A.
Is formed in the shape of a hole or a groove, and when the leg 31A and the clip 40A are fitted to each other at the time of engagement, the clip 40A can be easily and reliably connected to the pillar garnish 10A.
Can be correctly fixed to the leg 31A of the scattering prevention fixed locking portion 30A. Further, there is no concern about lateral displacement of the mounting portion in normal use. The positioning protrusion 37A and the positioning protrusion fitting portion 49A are preferably applied to the leg 31 and the clip 40 in the embodiment of FIGS.

As shown in FIG. 6, the rattling preventing fixing portion 16 has a fitting member seat 53 formed on the back surface of the pillar garnish 10, and a metal or resin fitting is formed on the seat 53. The attachment member 51 is fixedly attached to the vehicle body pillar portion 20.
The fitting member 51 is inserted into the fitting hole 29 formed in the inner panel 21 and is engaged therewith. The fitting member 51 of this example has locking pieces 52, 52 bent so as to bulge outward, and by attaching the pillar garnish 10 to the vehicle body pillar portion 20, the pillar garnish 10 is attached to the vehicle body pillar portion 20 without rattling. When the airbag A is fixed and the pillar garnish 10 is pushed and bent by the inflation of the airbag A, the fitting member 51 comes off the fitting hole 29 of the inner panel 21. The fitting member seat 53 is formed in a thin rib shape and has a pillar garnish 1.
No design sink is caused on the 0 design surface.

In the vehicle body pillar portion 20 to which the pillar garnish 10 (hereinafter, the same applies to the case of 10 A) formed as described above, the fitting hole 29 is aligned with the inner panel 21 at the position of the rattling preventing fixing portion 16. The pillar garnish locking holes 25 as shown in FIG. 7 are formed corresponding to the positions of the scattering prevention fixed locking portions 30 of the pillar garnish 10.

The locking hole 25 for pillar garnish is
The claw 35 and the clip 40 of the fixed locking portion 30 are shaped and dimensioned so that they can be inserted and engaged. In this example, the holes are substantially rectangular. Further, a hole diameter a of the locking hole 25 in a direction orthogonal to the legs 31 of the fixed locking portion 30, a distance b between the tips of the claws 35 of the fixed locking portion 30, and an outwardly bulging shape portion of the clip 40. The relationship with the maximum separation distance c between 43 is a <b, a <c. In addition, b
The value of -a and the value of ca are determined by the leg 31 and the clip 40.
It is usually about 2 to 5 mm, though it depends on the elasticity of the rubber.

First, the pillar garnish 10 is attached by firstly pressing the pillar garnish 10 from the vehicle interior side by aligning the positions of the pillar garnish locking holes 25 and the scattering prevention fixed locking portions 30. Insert and engage with the hole 25. At this time, the legs 31, 31 and the outwardly bulging portions 43, 43 of the clip 40 are pushed by the inner edges of the locking holes 25, and each of the locking holes 25 is elastically deformed inward.
Pass through. Then, from the dimensional relationship a <c, the outwardly bulging portions 43 and 43 of the clip 40 and the outward hook-like portions 45 are formed.
The inner edge of the pillar garnish locking hole 25 is locked and held in between, so that the fixed locking portion 30 is prevented from rattling during normal times (until the airbag is inflated). Then, in this state, the mounting portion 16 for preventing rattling in the normal state of the pillar garnish 10 is strongly pushed toward the inner panel 21 to insert and engage the fitting member 51 into the fitting hole 29. Installation is completed.

The locking holes 25 for pillar garnish are not limited to the above-described rectangular ones in a plan view. As shown in FIG. 8, locking holes 25B having a dimensional relationship of a, b, and c are provided. A series of large-diameter holes 26B having a hole size larger than the locking holes 25B and through which the claw 35 and the outwardly bulging shape portion 43 of the fixed locking portion 30 can smoothly pass is provided. A keyhole-shaped hole 28B may be used. In that case, when attaching the pillar garnish 10,
First, the leg 31 of the fixed locking portion 30 and the clip 40 are inserted into the large-diameter hole 26B, and the inner edge of the large-diameter hole 26B is formed into the outward hook-like portion 45 of the clip 40 and the outward bulging shape. Part 43, and in that state, the pillar garnish 1
By sliding 0 along the vehicle body pillar portion 20, the fixed locking portion 30 is moved from the large-diameter hole 26B to the locking hole 25B side to collide with the end of the locking hole 25B.
Next, the mounting portion 16 of the pillar garnish 10 for preventing the backlash in the normal state is strongly pushed to the inner panel 21 side, and the fitting member 51 may be inserted and engaged with the fitting hole 29. In this case, the size of the locking hole 25B of the embodiment shown in FIG. The pillar garnish can be formed to be smaller than 25, and the pillar garnish can be securely attached more easily. In addition, by sliding the pillar garnish 10 at the time of restoration or the like, the scattering prevention fixed locking portion 30B can be easily removed from the large-diameter hole 26B. In the drawings, the same members are represented by the same reference numerals.

When the pillar garnish 10 is pushed into the vehicle interior due to the inflation of the airbag A, the pillar garnish 10 attached to the vehicle body pillar portion 20 is fixed to prevent scattering as shown in FIG. The outwardly bulging portions 43 of the clip 40 attached to the locking portion 30 pass through the locking hole 25 while contacting with the inner edge of the locking hole 25 of the inner panel 21 and being pushed inward from each other. 9B, the inner edges of the locking holes 25 are fixed to the claws 35 of the fixed locking portion 30.
The pillar garnish 10 moves toward the interior of the vehicle until the vehicle collides with the vehicle and is locked, thereby facilitating the subsequent deployment of the airbag into the interior of the vehicle. A clip 4 is provided between the legs 31, 31.
Since the center bent portion 41 of 0 is interposed, the legs 31 and 31 do not fall inward and the distance b between the tips of the claws 35 does not decrease, and the dimensional relationship between the locking holes 25 and the claws 35 is as described above. A <b, it is possible to reliably prevent the claw 35 from passing through the locking hole 25 and being unlocked. This prevents the scattering prevention fixed locking portion 30 and the clip 40 from being disengaged from the locking hole 25 of the inner panel and the pillar garnish 10 from being scattered.
At the time of inflation of the airbag A, the rattling preventing fitting member 51 is disengaged from the fitting hole 29 of the inner panel at the mounting portion 16 for rattling prevention due to the inner panel 10 being pressed toward the cabin side.

In the structure of the anti-scattering fixed locking portion 30 according to the present invention, a clearance is normally required for fixing the inner panel 21 to the inner panel 21 as in a conventional fixing structure using a rod-shaped fixing metal. Therefore, it has sufficient mounting properties (anti-rattle properties) and positioning effects. By using only the mounting structure of the present invention at a plurality of locations without using the anti-rattle fitting member 51, The pillar garnish 10 can be attached and fixed to the inner panel 21.

[0029]

As shown and described above, according to the mounting structure of the pillar garnish with the built-in airbag according to the first aspect of the present invention, the fixed locking portion for preventing scattering is formed integrally with the pillar garnish. Since the metal fixing member or the like is not inserted, the appearance of the pillar garnish can be improved, the structure can be simplified, and the pillar garnish can be hardly detached or broken when the airbag is inflated and deployed. In addition, since another member is not used as an insert, recyclability is also good.

Further, according to the second aspect of the present invention, since the two legs are constituted by a pair of opposed walls having a flat cylindrical portion,
When the airbag is deployed, the legs are unlikely to fall down, so that the pillar garnish can be more reliably prevented from scattering.

Further, according to the third aspect of the present invention, the positioning projection is formed on the outer surface of the leg, and the positioning projection fitting portion for fitting the positioning projection is formed on the outer piece of the clip. Thus, the pillar garnish can be more securely fixed without shifting the position of the leg and the clip.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a vehicle cabin to which a pillar garnish with a built-in airbag is mounted by a mounting structure of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an enlarged sectional view showing the vicinity of a fixed locking portion in FIG. 2;

FIG. 4 is an enlarged perspective view showing the vicinity of a fixed locking portion with a clip removed.

FIG. 5 is an enlarged perspective view showing another example of the fixed locking portion and the clip.

FIG. 6 is a sectional view taken along line 6-6 in FIG. 1;

FIG. 7 is a perspective view showing a dimensional relationship between a locking hole of an inner panel, a clip, and the like.

FIG. 8 is a perspective view showing another example of the locking holes of the inner panel.

FIG. 9 is an enlarged cross-sectional view showing a state of the fixed locking portion when the airbag is deployed.

FIG. 10 is a schematic diagram of a vehicle cabin to which a conventional pillar garnish with a built-in airbag is attached.

FIG. 11 is a schematic view showing an airbag when inflated.

FIG. 12 is a sectional view taken along line XX of FIG. 10;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Pillar garnish 20 Body pillar part 25 Pillar garnish locking hole 30 Prevention of scattering fixed locking part 31 Leg 35 Claw 40 Clip 41 Center bending part 42 Outer piece 43 Outward bulging part 45 Outward hook part 47 For nail Locking hole A Airbag a Hole diameter in the direction orthogonal to the legs of the fixed locking portion in the locking hole b Distance between the claw tips of the fixed locking portion c Maximum separation distance between the outwardly bulging shaped portions of the clip t Root thickness m Leg width w Leg spacing

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (reference) F16B 21/08 F16B 21/08 F term (reference) 3D023 BA01 BB09 BD08 BE03 BE36 3D054 AA18 BB30 FF04 FF20 3J001 FA19 GA06 GC07 JD24 KA03 KA07 KA12 KB01 3J037 AA02 BA02 DA05 DA13 DB02 DC02 DC05

Claims (3)

[Claims] 1. A pillar garnish (10) having a scattering prevention fixed locking portion (30) protruding from a rear surface thereof, together with a clip (40) attached to the locking portion, for locking a pillar garnish of an inner panel of a vehicle. The pillar garnish is attached to the inner panel by being inserted and locked in the hole (25), and when the pillar garnish is pushed into the vehicle interior by the pressure at the time of inflation of the airbag, the pillar garnish separates from the inner panel and scatters. In the mounting structure of a pillar garnish with a built-in airbag which prevents the fixed locking portion from engaging with the locking hole, the fixed locking portion (30) is substantially parallel to the two legs (31). A central bent portion (41), comprising a tapered claw (35) formed on the outside, wherein the clip (40) is inserted between the legs to prevent the two legs from approaching each other; An outer piece (42) arranged outside the leg so as to sandwich the leg between the central bent portion and the outer piece (42) is bent in a substantially W-shaped cross section. An outward hook-like portion (45) that is engaged with the inner side of the inner panel through the engagement hole (47) for the claw to be engaged with the inner panel (35) and the engagement hole (25) for the pillar garnish of the inner panel. Is formed, and an outwardly bulging portion (43) is formed to be bent between the hook hole for claw and the outward hook-like portion, and the fixing member in the hook hole for pillar garnish of the inner panel is formed. The relationship between the hole diameter a in the direction perpendicular to the legs of the stop portion, the distance b between the claw tips of the fixed locking portion, and the maximum separation distance c between the outwardly bulging portions of the clip is a <
b, a <c, wherein a pillar garnish mounting structure with a built-in airbag is provided. 2. The mounting structure for a pillar garnish with a built-in airbag according to claim 1, wherein the two legs (31A) are constituted by a pair of opposed walls of a flat cylindrical portion. 3. A positioning projection (37A) is formed on the outer surface of the leg, and a positioning projection fitting portion (49A) into which the positioning projection fits is formed on the outer piece (42A) of the clip. The mounting structure for a pillar garnish with a built-in airbag according to claim 1 or 2.