JP2001026247A - Mounting structure for pillar garnish with built-in air bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hardly cause the disengagement and breakage of a pillar garnish during inflation and development of an air bag and hardly cause play and unusual noise due to vibration during a normal period. SOLUTION: In a mounting structure for a pillar garnish with a built-in air bag, a rod metal fixture 30 fixed at one end to a pillar garnish 10 has a locking portion 33 at the other end, which is inserted and locked to a locking hole 25 in a body pillar portion 20 in mounting the pillar garnish 10, so that the disengagement of the pillar garnish 10 is prevented by the engagement of the rod metal fixture 30 with the locking hole 25 when the pillar garnish is forcibly bent with the inflation of an air bag A stored behind the pillar garnish 10. The side outer periphery of a shaft portion 32 of the rod metal fixture 30 is covered with a covering member 40 and the outer periphery of the cover member 40 is engaged with the locking hole 25 in the body pillar portion 20.

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, as shown in FIGS. 11 and 12, an airbag A is also housed behind a pillar garnish 80 attached to a pillar portion of a vehicle body. It became so. In this case, the airbag A is inflated due to the side collision, and the inflating causes the pillar garnish 80 to be pushed and bent toward the vehicle interior to form a gap for passing the airbag A between the vehicle body pillar portion 95 and the pillar garnish 80, The airbag A is deployed between the occupant head T and the window glass G as shown by a chain line Bo through the gap to protect the occupant head T.

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. For this reason, a structure has been proposed in which the widthwise intermediate portion of the pillar garnish 80 is securely locked to the vehicle body pillar portion 95 with a rod-shaped fixing metal such as a bolt.

[0004] Further, in order to prevent the head of the rod-shaped fixing bracket from being exposed on the design surface of the pillar garnish, that is, the surface on the vehicle interior side, so as not to impair the aesthetic appearance, as shown in FIG. It is conceivable to form a fixing seat portion 81 projecting from the base portion 81 and embed and fix a head portion 86 at one end of a rod-shaped fixing bracket 85 in the seat portion 81.
In the figure, F indicates a windshield, C indicates wiring from an engine room, 97 indicates an opening trim, 98 indicates a glass run channel, and 99 indicates a body frame.

However, in the above-described mounting structure, in the normal state, the protrusion of the pillar garnish 80 into the passenger compartment is reduced to increase the space in the vehicle, while the airbag A is inflated when the airbag A is inflated. It is preferable that the airbag A accommodation space, that is, the distance between the pillar portion 95 of the vehicle body and the pillar garnish 80 be as large as possible so as not to obstruct it. Therefore, in the mounting structure,
The side surface of the shaft portion 87 of the rod-shaped fixing member 85 is engaged so that the rod-shaped fixing member 85 can move in the required direction toward the vehicle interior together with the pillar garnish 80 when the pillar garnish 80 is pressed into the vehicle interior due to the inflation of the airbag A. The locking hole 96 is simply inserted into the locking hole 96 without engaging with the locking hole 96.
8 is provided with a clearance N required for sliding the rod-shaped fixing bracket 85. Further, between the outer peripheral surface of the shaft portion 87 of the rod-shaped fixing bracket 85 and the inner peripheral surface of the locking hole 96,
The clearance M exists from the viewpoint of workability and the like. Since the clearances M and N exist as described above, when the pillar garnish 80 is pressed from the indoor side near the head 86 of the rod-shaped fixing bracket 85 in normal times, rattling may be felt. Further, even during traveling, the shaft portion 87 of the rod-shaped fixing bracket 85 may come into contact with the locking hole 96 due to vibration, thereby generating abnormal noise.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is unlikely that the pillar garnish will come off or break 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 does not cause any rattling or abnormal noise even when pressed or vibrated from a vehicle interior.

That is, according to the first aspect of the present invention, the other end locking portion of the rod-shaped fixing metal fixed at one end to the synthetic resin pillar garnish is inserted into the locking hole formed in the inner panel of the vehicle body pillar portion. Attach and attach the pillar garnish, and when pushing and bending the pillar garnish due to inflation of the airbag housed on the back side of the pillar garnish,
In the mounting structure of the airbag built-in pillar garnish, which prevents the pillar garnish from coming off by engagement of the other end side locking portion and the locking hole of the rod-shaped fixing bracket,
The outer peripheral surface of the side portion of the shaft portion of the rod-shaped fixing bracket is covered with a covering member, and the outer peripheral surface of the covering member is engaged with the locking hole of the pillar portion and temporarily fixed, and the pillar garnish is pushed and bent by the inflation of the airbag. Occasionally, the engagement between the covering member and the locking hole is released, and the locking hole is engaged with the locking portion on the other end of the rod-shaped fixing bracket.

According to a second aspect of the present invention, in the first aspect, a locking groove is provided on an outer peripheral surface of the covering member of the rod-shaped fixing bracket to be temporarily engaged with a locking hole of the pillar portion, and the covering is formed. The outer diameter of the tip of the member on the side of the rod-shaped fixing bracket locking portion is smaller than the outer diameter of the locking portion of the rod-shaped fixing bracket.

According to a third aspect of the present invention, in the second aspect, a communication insertion path communicating with the locking hole at an upper end, and a communication opening at the lower end of the communication insertion path and communicating with the locking hole through the communication insertion path. The inner hole of the pillar portion is formed in the inner panel of the pillar portion, and the relationship between the inner diameter and the outer diameter X of the insertion hole is larger than the diameter L1 of the insertion hole and the outer diameter X of the outer peripheral edge of the locking groove on the side of the locking metal fitting locking portion. The inner diameter Y of the locking groove> the width L2 of the communication insertion path, and the thickness T of the pillar portion of the inner panel <the groove width Z of the locking groove <3T.

According to a fourth aspect of the present invention, in the second aspect, the tip of the covering member on the side of the rod-shaped fixing bracket locking portion reaches the rod-shaped fixing metal locking portion, and the rod-shaped fixing member is fixed to the locking groove of the covering member. An intermediate concave portion is formed between the bracket engaging portion side tip portion,
Further, a communication insertion path communicating with the locking hole at the upper end and an insertion hole at the lower end of the communication insertion path communicating with the locking hole via the communication insertion path are formed in the inner panel of the pillar portion. The relationship is that the diameter of the insertion hole L1 ≧ the outer diameter X of the outer peripheral edge of the locking groove on the side of the rod-shaped fixing bracket locking portion> the diameter L3 of the locking hole ≧ the inner diameter Y of the locking groove> the width L2 of the communication insertion path. Outer diameter U of tip end of rod-shaped fixing bracket engaging portion of covering member> Width L2 of communication insertion path ≧
The inner diameter R of the intermediate concave portion, and the thickness T of the pillar portion of the inner panel <the groove width Z of the locking groove <3T.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the covering member for covering the side outer peripheral surface of the shaft portion of the rod-shaped fixture is made of resin.
According to a sixth aspect of the present invention, in the fifth aspect, the one end side of the rod-shaped fixture is a head having a larger diameter than a shaft portion, and the covering member covers an outer periphery thereof, and the head of the rod-shaped fixture is the head. Together with the covering member described above, is embedded in a seat protruding from the back surface of the pillar garnish.

[0012]

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 view showing a vehicle interior to which a pillar garnish is mounted according to an embodiment of the mounting structure of the present invention, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, and FIG.
FIG. 4 is a partial perspective view showing the pillar garnish when the pillar garnish is mounted, FIG. 5 is a cross-sectional view of the pillar garnish when the airbag is inflated, and FIG. 6 is a cross-section showing another example of the pillar garnish of the present invention. FIG. 7 is a cross-sectional view of another example of the pillar garnish when the airbag is inflated,
8 is a graph of DSC, FIG. 9 is a perspective view showing another example of the covering member, and FIG. 10 is a cross-sectional view showing another example of the present invention.

FIG. 1 and FIGS.
As shown in FIG. 3 showing three cross sections, the pillar garnish 10 according to the present invention is attached to the inner panel 21 of the vehicle body pillar portion 20 located above the instrument panel P of the automobile with the airbag A folded on the back side. And covers the inside of the vehicle interior of the pillar portion 20. 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 gap between the pushed and bent side edge 12 of the pillar garnish 10 and the inner panel 21 of the vehicle body pillar portion 20 is formed. Thus, the airbag A is deployed inside the side glass G to protect the occupant's head mainly.

The pillar garnish 10 is formed by injection molding, and is formed of a synthetic resin cover body having a required length and a curved cross-sectional shape bulging into the vehicle interior, and having a width corresponding to the vehicle longitudinal direction. Approximately center position 13 in the direction
The rear surface of the vehicle rear side 11 (side glass G side) is a portion for accommodating the airbag A, and the vehicle front side 14
The back surface (that is, the front glass F side) is a portion for accommodating the power cord C and the like from the engine room.
Reference numeral 22 denotes an opening trim, 23 denotes a glass run channel, and 24 denotes a body frame.

The resin constituting the pillar garnish 10 is an appropriate resin, preferably a TPO resin (polyolefin thermoplastic elastomer). However, since the pillar garnish 10 is usually a long part having a length of 50 cm or more, a dimensional change is likely to occur due to thermal expansion due to a high vehicle interior temperature in summer, and at a high temperature, the resin is softened to the pillar portion. There is a property that the strength near the mounting part is easily reduced. 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.). Resin of appropriate hardness (softness) from the viewpoint of workability in mounting to the body pillar
It is necessary to From this point, as the resin constituting the pillar garnish, the Izod impact strength (-35
° C, JIS K 7110) is greater than 20 kg · cm / cm, and the flexural modulus (JIS K 7203) is 4,50.
Greater than 0 kg / cm ² , heat distortion temperature (4.6 kg load, JIS K 7207) greater than 90 ° C., linear expansion coefficient (-35 ° C. to 90 ° C., ASTM D 696) of 10
Particularly preferred is a TPO of less than ° C.cm / cm.

In the pillar garnish 10 of this embodiment, the lower end is inserted and fixed in a hole (not shown) formed in the instrument panel P, and the pillar garnish 10 has an intermediate portion.
Mounting portions 15, 15, 16, 1 along the longitudinal direction of
6 attaches to the inner panel 21 of the vehicle body pillar portion 20. Intermediate mounting parts 15, 15, 16, 16 in this example
The pillar garnish 10 includes a mounting portion 15 for preventing the pillar garnish from coming off when the airbag A is inflated, and a mounting portion 16 for holding in a normal state. Are located alternately.

As shown in FIG. 2, the detachment prevention mounting portion 15 has a seat 17 protruding from the back surface of the pillar garnish 10, and the head 31 of the rod-shaped fixing bracket 30 is provided in the seat 17. It is buried and fixed. The seat 17 has a side surface 17a and a bottom surface 17b.
The head 31 of the rod-shaped fixture 30 is embedded in the part surrounded by b.

The rod-shaped fixture 30 has a large-diameter head 31 at one end of a shaft 32 and a locking portion 3 at the other end of the shaft 32.
3 is provided. The rod-shaped fixing bracket 30 of the embodiment
Is composed of a bolt and a nut. The head of the bolt constitutes the head 31 of the rod-shaped fixing bracket 30, and the nut is
Is composed. The nut serving as the locking portion 33 is screwed to a bolt and fixed to the head 31 by welding or the like so that the position is not shifted. Note that the rod-shaped fixture 30 is not limited to bolts and nuts as in this example. Reference numeral 34 indicates a flange portion of the nut.

The shaft portion 32 of the rod-shaped fixing bracket 30 is covered with a cylindrical covering member 40 made of an appropriate metal or resin on the outer peripheral surface of the shaft portion, and is formed on the inner panel 21 of the pillar portion 20. The covering member 40 is engaged with the stopper hole 25 on the outer peripheral surface and is temporarily fixed. The temporary fixing by the covering member 40 is released when the pillar garnish 10 is pressed in the vehicle interior direction due to the inflation of the airbag A.

In the covering member 40 of this embodiment, a head covering portion 41 covering the head 31 of the rod-shaped fixing member 30 and a shaft portion covering portion 4 covering the side surface of the shaft portion 32 of the rod-shaped fixing member 30.
2 is formed in a series, and a locking groove 43 that engages with the locking hole 25 of the vehicle body pillar portion 20 is formed on the outer peripheral surface of the shaft portion covering portion 42 near the bar-shaped fixing bracket locking portion 33. As shown in FIG. 4, the outer peripheral edge 44 and the outer peripheral edge 45 on the side of the rod-shaped fixing bracket on both sides of the retaining groove 43 are larger in diameter than the retaining hole 25 of the pillar portion 20. ing. Also,
The outer peripheral edge 44 of the locking groove 43 on the side of the rod-shaped fixing bracket locking portion is
The diameter is smaller than the locking portion 33 of the rod-shaped fixing bracket 30. Further, the covering member 40 is tapered from the outer peripheral edge 44 of the locking groove 43 to the locking portion 33 of the rod-shaped fixing member 30 on the rod-shaped fixing member locking portion-side outer periphery 44. The outer diameter of the portion 46 is smaller than the outer diameter of the locking portion 33. The locking groove 43 of the covering member 40 and the locking portion 33
The distance between them corresponds to the distance between the locking hole 25 of the pillar portion 20 and the locking portion 33 in the pillar garnish in normal times.

In this embodiment, the covering member 40 covers up to the head 31 of the rod-shaped fixing bracket 30 for the following reason. That is, when the head 31 of the rod-shaped fixture 30 is insert-molded into the seat 17 and the pillar garnish 10 is injection-molded, the molten resin is applied to the rod-shaped fixture 3.
In order to prevent the surface of the pillar garnish 10 after molding from easily causing unsightly sink marks or the like due to direct heat contact with the head of the garnish 10 and the like,
This is to prevent the base 18 of the seat portion 17 from cracking when pressed. Covering member 40 that achieves that purpose
Is preferably compatible with the resin of the pillar garnish 10 and is fused. For example, when the pillar garnish 10 is made of TPO, the covering member 40 is preferably made of the same type of resin, that is, TPO.

Further, in this embodiment, in order to surely prevent cracks in the base portion 18 of the seat portion 17, polypropylene is used as the TPO constituting the covering member 40.
A peak area S1 containing 0 wt% or more and indicating the heat of fusion of the polypropylene, represented by DSC (differential scanning calorimetry) as shown in FIG. 8, and a peak indicating the heat of fusion of the component melting at a lower temperature than the polypropylene. It is preferable to use one having a relationship of area S2 satisfying S2 / S1 <1/2. Components that melt at a lower temperature than the polypropylene include high-density PE (polyethylene), low-density PE,
In addition to PE copolymers such as ethylene-α-olefin copolymers and ethylene-acrylic acid copolymers, styrene polymers such as polypropylene such as SEBS (styrene-ethylene-butene-styrene copolymer) at a lower temperature. Examples of the polymer include a melting polymer.

Further, the covering member 4 in this embodiment is
The resin that constitutes No. 0 has an Izod impact strength (−30 ° C.,
JIS K 7110) is greater than 4.5 kg · cm / cm, and the flexural modulus F1 of the resin constituting the covering member 40 and the flexural modulus F2 of the resin constituting the pillar garnish 10 (both are ASTM D790). The relationship of (measurement) is more preferably F1 <F2. By selecting the resin in this manner, it is possible to suppress an increase in the rigidity of the entire seat portion 17, and when the pillar garnish 10 is pressed by the inflation of the airbag A, the pillar garnish 10 is pressed.
Can be easily bent in the vicinity of the seat portion 17, so that cracks can be hardly generated in the base portion 18 of the seat portion side surface 17a serving as a hinge portion.
Further, the flexural modulus F of the resin constituting the covering member 40 is
1 range 2000~7000kg / cm ^2, bending range of modulus F2 of the resin constituting the pillar garnish 10 is particularly preferably 5000~10000kg / cm ^2.

The inner panel 2 of the vehicle body pillar portion 20
In this embodiment, as shown in FIG. 4, the locking hole 25 formed at the upper end of the communication insertion path 27 is located at the upper end of the communication insertion path 27, and the insertion hole 26 is located at the lower end of the communication insertion path 27. 27
Are formed so as to communicate with each other. The locking hole 2
5 and the insertion hole 26 are circular holes, while the communicating insertion path 27 is formed by a diameter L3 of the locking hole 25 and a diameter L of the insertion hole 26.
It consists of linear openings having an opening width L2 smaller than 1, and they constitute a gourd-shaped opening with the locking hole 25 facing upward along the vertical direction of the pillar portion 20. The work of attaching the pillar garnish 10 will be described later.

The relationship between the size of the locking hole 25 and the like and the size of the locking groove 43 of the covering member 40 is as follows.
The outer diameter X of the outer peripheral edge 44 of the locking groove 43 on the side of the rod-shaped fixing bracket locking portion.
> Diameter L3 of locking hole 25 ≧ inner diameter Y of locking groove 43> groove width L2 of communication insertion path 27 is preferable.
1. The thickness T of the pillar portion 20 <the groove width Z of the locking groove 43 <3T
It is preferred that According to such a relationship, as described later, when the pillar garnish 10 is fixed to the vehicle body pillar portion 20, the pillar garnish 10 is inserted into the insertion hole 26 of the rod-shaped fixing bracket 30, moved upward in the communication insertion path 27, and Stop hole 2
5 can be easily locked by the cover member locking groove 43, and in a normal state, rattling can be hardly generated at the position of the rod-shaped fixing bracket 30 even when the pillar garnish 10 is pressed from the vehicle interior side. Further, the outer diameter V of a boundary portion 46 between the cover member 40 and the rod-shaped fixing bracket engaging portion 33 is set.
About the outer diameter X of the bar-shaped fixing bracket locking portion side outer peripheral edge 44 of the locking groove 43> the outer diameter V of the boundary portion 46> the diameter L of the locking hole 25.
If it is 3, the pillar garnish 10 described later can be easily attached.

The diameter L1 of the insertion hole 26, the diameter L3 of the locking hole 25, and the outer diameter W of the locking portion 33 of the rod-shaped fixture 30 are shown.
The diameter L1 of the insertion hole 26 ≧ the outer diameter W of the locking portion 33 of the rod-shaped fixing bracket 30> the diameter L3 of the locking hole 25. Also, an outer peripheral edge 44 of the locking groove 43 on the side of the rod-shaped fixing bracket locking portion.
The difference between the outer diameter X and the diameter L3 of the locking hole 25 is determined by the pressing force applied to the pillar garnish 10 to the pillar garnish 10 when the airbag A is inflated. Peripheral edge 4 of stop groove 43 on the side of rod-shaped fixing bracket locking portion
4 is forcibly passed through the locking hole 25 and is generally 0.5 to 2.5 mm, preferably 1.0 to 2.0 m.
m.

As shown in FIG. 3, a known metal or resin clip 50 is fixed to a clip seat portion 51 formed on the back surface of the pillar garnish 10, and the holding mounting portion 16 in a normal state is fixed to the vehicle body pillar. Inner panel 2 of part 20
The clip 50 is inserted into and engaged with the clip hole 29 formed in the device 1. Clip 50 of this example
Has a locking piece 50a bent to bulge outward,
By attaching the pillar garnish 10 to the vehicle body pillar portion 20, the pillar garnish 10 is fixed to the vehicle body pillar portion 20 without rattling, and when the pillar garnish 10 is pushed up by the inflation of the airbag A, the clip 50 is moved to the clip hole 29 of the inner panel 21. It comes out of the. Further, the clip seat portion 51 is formed in a thin rib shape so that the design surface of the pillar garnish 10 does not cause sink marks.

An example of the mounting operation of the pillar garnish 10 will be described with reference to FIG. First, the locking portion 33 of the rod-shaped fixture 30 is inserted into the insertion hole 26 of the vehicle body pillar portion 20 so that the insertion hole 26 is positioned near the boundary 46 between the locking portion 33 and the covering member 40. I do. Then
The pillar garnish 10 is slid upward along the vehicle body pillar portion 20 until the vicinity of the boundary portion 46 of the covering member 40 passes through the communication insertion path 27 and collides with the locking hole 25. Thereby, the holding attachment portion 16 in the normal state is provided.
Is moved onto the clip hole 29 of the inner panel 21. Next, at that position, the pillar garnish 10 is strongly pushed toward the inner panel 21 to insert and engage the clip 50 into the clip hole 29, and the rod-shaped fixing bracket 30 is further pressed into the locking hole 25 together with the covering member 40. When the locking groove 43 and the locking hole 25 are engaged, the mounting of the pillar garnish 10 is completed.

As shown in FIG. 2, the pillar garnish 10 attached to the vehicle body pillar portion 20 as described above normally has the engagement groove 43 of the covering member 40 and the engagement hole 25 of the inner panel 21 engaged. Together, the pillar garnish 10 is held without rattling. On the other hand, when the airbag A is inflated, as shown in FIG. 5, the inflating of the airbag A pushes the pillar garnish 10 toward the vehicle interior with a large force. Pulled in the direction. As a result, the outer peripheral edge 44 of the locking groove 43 on the side of the rod-shaped fixing bracket locking portion forcibly passes through the locking hole 25, and the engagement between the locking groove 43 and the locking hole 25 is released. The rod-shaped fixing bracket 30 and the covering member 40 slide together with the pillar garnish 10 toward the vehicle interior. Then, the locking portion 33 of the rod-shaped fixing bracket 30 is engaged with the locking hole 25 of the inner panel 21.
The pillar garnish 10 is prevented from coming off the vehicle body pillar portion 20 by being engaged with the periphery of
Further, the rear side of the pillar garnish 10 is pushed and bent toward the vehicle interior, and the airbag A is deployed into the vehicle interior through a gap between the pillar garnish 10 and the vehicle body pillar portion 20 caused by the pushing and bending.

On the other hand, a pillar garnish 10A shown in FIG. 6 relates to an embodiment of the invention of claim 4,
Shape of covering member 40A and covering member 40A and locking hole 25
Except for the dimensional relationship such as the above, other configurations are the same as those of the above-described embodiment shown in FIGS. 1 to 5, and the same portions are denoted by the same reference numerals as those of the above-described embodiment. In this embodiment, the rod-like fixing metal fitting locking portion side tip portion 49A of the covering member 40A reaches the rod-like fixing metal fitting locking portion 33, and the locking groove 43A of the coating member 40A and the rod-like fixing metal locking portion side. It has a structure in which an intermediate recess 48A is formed between the front end 49A.

The dimensional relationship between each part of the covering member 40A and the locking hole 25 shown in FIG. 4 is as follows. That is, the diameter L1 of the insertion hole 26 ≧ the outer diameter X of the outer peripheral edge 44A of the rod-shaped fixing member locking portion side of the locking groove 43A> the diameter L3 of the locking hole 25 ≧ the inner diameter Y of the locking groove 43A> Width L2, rod-shaped fixing bracket locking portion side tip 49A of covering member 40A
The outer diameter U> the width L2 of the communication insertion path 27 ≧ the inner diameter R of the intermediate recess 48A, the plate thickness T of the pillar portion 20 of the inner panel 21 <the groove width Z of the locking groove 43A <3T.

Further, even in the locking portion 33 of the rod-shaped fixture 30 of this embodiment, the pillar garnish 10
As in the case of the above, the diameter L1 of the insertion hole 26 and the locking hole 2
5 and the outer diameter W of the locking portion 33 of the rod-shaped fixing member 30, the diameter L1 of the insertion hole 26 ≧ the outer diameter W of the locking portion 33 of the rod-shaped fixing member 30> the diameter L3 of the locking hole 25. Is done. Further, the outer peripheral edge 4 of the locking groove 43A on the side of the rod-shaped fixing bracket locking portion.
The difference between the outer diameter X of 4A and the diameter L3 of the locking hole 25 is determined by the pressing force applied to the pillar garnish 10 in the vehicle compartment direction when the locking groove 43A exerts a temporary fixing action in normal times and the airbag A is inflated. The outer peripheral edge 44 of the locking groove 43 on the side of the rod-shaped fixing bracket locking portion is forcibly passed through the locking hole 25,
Generally 0.5 to 2.5 mm, preferably 1.0 to
2.0 mm.

The operation of attaching the pillar garnish 10A to the vehicle body pillar portion 20 will be described with reference to FIG. 6 and the vehicle body pillar portion 20 with reference to FIG. First, the rod-shaped fixture 3 is inserted into the insertion hole 26 of the vehicle body pillar 20.
0 engaging portion 33 is inserted into the intermediate recess 4 of the covering member 40A.
The insertion hole 26 is positioned at 8A. Next, the pillar garnish 10A is slid upward along the vehicle body pillar portion 20 until the intermediate recess 48A of the covering member 40A passes through the communication insertion path 27 and collides with the inner peripheral edge of the locking hole 25. Next, at that position, the pillar garnish 10 </ b> A is strongly pushed toward the inner panel 21 and the
The engagement of the pillar garnish 10A is completed by engaging the locking hole 25 with the 3A. The mounting operation and procedure are almost the same as those of the pillar garnish 10 of the embodiment. At the time of the attachment, the work can be easily performed and the backlash of the pillar garnish 10A can be made less likely to occur in normal times due to the dimensional relationship of the above.

According to the pillar garnish 10A mounted in this manner, the locking groove 43A of the covering member 40A and the locking hole 25 of the inner panel 21 are normally engaged with each other, so that the pillar garnish 10A does not rattle. Will be retained.

On the other hand, when the airbag A is inflated,
As can be seen from FIG. 7, the inflating of the airbag A pushes the pillar garnish 10A toward the interior of the vehicle, thereby engaging the outer peripheral edge 44A of the locking groove 43A of the covering member 40A on the rod-shaped fixing bracket locking portion side. The engagement between the locking groove 43A and the locking hole 25 is released by forcibly passing through the stop hole 25, and the rod-shaped fixing bracket 30 is moved to the pillar garnish 10A.
Together with the vehicle. And the rod-shaped fixing bracket 3
The engagement portion 33 of the inner panel 21 comes into contact with the periphery of the engagement hole 25 of the inner panel 21 to prevent the pillar garnish 10A from coming off or being scattered, and the rear portion of the pillar garnish 10A is pushed and bent toward the vehicle interior, thereby. The airbag A is deployed in the vehicle cabin through the gap formed between the airbag A and the vehicle body pillar portion 20.

The airbag A is inflated and deployed by supplying gas from the inflator I into the airbag A for a predetermined time. Therefore, during the gas supply, the pillar garnish 1
A pressing force in the direction of the vehicle compartment is applied to 0A, and the locking portion 33 of the rod-shaped fixing bracket 30 and the peripheral edge of the locking hole 25 of the inner panel are pressed, so that the engagement between the locking portion 33 and the locking hole 25 is performed. As a result, the pillar garnish 10A is reliably prevented from coming off and scattering.

When the supply of the gas is completed, there is no longer any force to press the pillar garnish 10A toward the interior of the vehicle, so that a downward force acts on the pillar garnish 10A and the rod-shaped fixture 30 along the pillar portion due to its own weight. However, in the locking hole 25, the rod-shaped fixing-metal-locking-portion-side tip portion 49A of the covering member 40A is located, and the outer diameter U of the tip portion 49 is equal to the width L2 of the communication insertion path 27 as described above. The rod-shaped fixing bracket 30
Cannot slide down the communication insertion path 27 of the locking hole 25, and the rod-shaped fixture 30 can be prevented from coming off through the insertion hole 26 at the lower end of the communication insertion path 27.
Thereby, even after the airbag is inflated and deployed, it is possible to prevent the pillar garnish 10A from falling off from the vehicle body pillar portion 20.

Still more preferably, the locking hole 25
If the diameter L3 <the outer diameter U of the rod-shaped fixing bracket locking portion side distal end portion 49A of the covering member 40A, the distal end portion 49A of the covering member 40A is located in the locking hole 25 as shown in FIG. By strongly pressing and engaging, the pillar garnish 10
Since A can move only in the axial direction of the rod-shaped fixing bracket 30 with respect to the pillar portion 20 of the inner panel 21, the pillar garnish 10A can be completely prevented from falling off. Covering member 40A for this locking hole 25
The engagement effect of the distal end portion 49A becomes more reliable when the covering member 40A is made of resin.

It should be noted that the covering members 40 and 40A of the above embodiment are used.
Is formed by integrally covering up to the head 31 of the rod-shaped fixture 30 by injection molding or the like, but the present invention is not limited to this. In particular, in the case where the rod-shaped fixture is composed of bolts and nuts and the head of the rod-shaped fixture is also covered with resin, for example, as shown in FIG. On the other hand, the shaft portion covering portion 42 that covers the outer peripheral surface of the shaft portion 32 is formed as a separate body, and the shaft portion covering portion 42 is mounted on the shaft portion 32 of the rod-shaped fixture 30, and then a nut is screwed onto the shaft portion 32. With the structure, only the shaft portion covering portion 42 needs to be replaced at the time of repair, which is economical. Further, the shape of the covering member itself is not limited to this. For example, as shown in FIG.
A constriction 49 may be provided on the outer periphery of the covering member 40 between the head 31 of the No. 0 and the locking groove 43 of the covering member 40 to reduce the amount of resin used. Of course, the same can be said for the covering member 40A of the embodiment according to the fourth aspect of the present invention.

[0040]

As shown and described above, according to the mounting structure of the pillar garnish with the built-in airbag of the present invention, the pillar garnish can be prevented from coming off when the airbag is inflated.
It is possible to prevent generation of abnormal noise due to rattling or vibration.
Further, a general-purpose rod-shaped fixing bracket can be used, and it is not necessary to specially prepare a dedicated fixing rod. Therefore, the cost is not particularly increased, and there is an effect of being excellent in economy.

According to the fourth aspect of the present invention, the pillar garnish can be prevented from falling off even after the airbag is inflated and deployed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a vehicle cabin to which a pillar garnish is mounted according to an embodiment of the mounting structure of the present invention.

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

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a partial perspective view showing a state where a pillar garnish is attached.

FIG. 5 is a sectional view of a pillar garnish when an airbag is inflated.

FIG. 6 is a sectional view showing another example of the pillar garnish of the present invention.

FIG. 7 is a cross-sectional view of another example of a pillar garnish when an airbag is inflated.

FIG. 8 is a graph of DSC.

FIG. 9 is a perspective view showing another example of the covering member.

FIG. 10 is a sectional view showing still another example of the present invention.

FIG. 11 is a schematic diagram of a vehicle cabin to which a conventional pillar garnish with a built-in airbag is attached.

FIG. 12 is a schematic view showing an airbag when inflated.

FIG. 13 is a sectional view taken along a line 13-13 in FIG. 11;

FIG. 14 is a cross-sectional view of the pillar garnish when the airbag is inflated.

[Explanation of symbols]

 10, 10A Pillar garnish 17 Seat portion 20 Body pillar portion 25 Locking hole 26 Insertion hole 27 Communication insertion path 30 Bar-shaped fixing bracket 31 Bar-shaped fixing bracket head 32 Bar-shaped fixing bracket shaft 33 Bar-shaped fixing bracket locking section 40, 40A Coating Members 43, 43A Locking grooves 44, 44A Outer peripheral edge of the locking groove on the rod-shaped fixing member locking portion side 48A Intermediate concave portion of the covering member 49A Tip portion of the coating member on the rod-shaped fixing member locking portion side A Airbag

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference)

Claims (6)

[Claims] 1. A pillar-shaped metal fitting fixed to one end of a pillar garnish made of synthetic resin, the other end of which is fixedly inserted into a locking hole formed in an inner panel of a vehicle body pillar, and the pillar is fixed. When the garnish is attached and the pillar garnish is pushed and bent by the inflation of the airbag housed on the back side of the pillar garnish, the pillar garnish is prevented from coming off by engagement of the other end side locking portion of the rod-shaped fixing bracket with the locking hole. In the mounting structure of the pillar garnish having the built-in airbag, the outer peripheral surface of the shaft portion of the rod-shaped fixing bracket is covered with a covering member, and the outer peripheral surface of the covering member is engaged with the locking hole of the pillar portion. When the pillar garnish is pressed and bent by the airbag inflation, the engagement between the covering member and the locking hole is released, and the locking hole and the other end side locking portion of the rod-shaped fixing bracket are disengaged. Mounting structure of the air bag internal pillar garnish, characterized in that it has to be engaged. 2. The rod-shaped fixing bracket of the covering member according to claim 1, wherein a locking groove is formed on an outer peripheral surface of the covering member of the rod-shaped fixing bracket to temporarily engage with a locking hole of the pillar portion. A mounting structure for a pillar garnish with a built-in airbag, wherein an outer diameter of a locking portion side tip is smaller than an outer diameter of a locking portion of a rod-shaped fixing bracket. 3. The communication insertion path according to claim 2, wherein the communication insertion path communicates with the locking hole at an upper end, and the insertion hole at the lower end of the communication insertion path and communicates with the locking hole via the communication insertion path. The inner panel of the pillar portion is formed on the inner panel, and the relationship between them is as follows: insertion hole diameter L1 ≧ outer diameter X of locking rod side outer peripheral edge of locking groove> locking hole diameter L3 ≧ locking groove inner diameter Y> the width L2 of the communication insertion path, and the thickness T of the pillar portion of the inner panel <the groove width Z of the locking groove <
An installation structure of a pillar garnish with a built-in airbag, which is 3T. 4. The rod-shaped fixing bracket engaging portion of the coating member according to claim 2, wherein a tip of the covering member on the rod-shaped fixing metal engaging portion reaches the rod-shaped fixing metal engaging portion, and the locking groove of the covering member and the rod-shaped fixing metal engaging portion side. An intermediate concave portion is formed between the distal end portion and the communication hole; and a communication insertion path communicating with the locking hole at an upper end, and an insertion at the lower end of the communication insertion path and communicating with the locking hole through the communication insertion path. A hole is formed in the inner panel of the pillar portion, and the relationship therebetween is as follows: Insertion hole diameter L1 ≧ outer diameter X of outer peripheral edge of rod-shaped fixing bracket locking portion side of locking groove> diameter L3 of locking hole ≧ locking The inner diameter Y of the groove> the width L2 of the communication insertion path, the outer diameter U of the tip end of the covering member on the side of the rod-shaped fixing bracket engaging portion> the width L2 of the communication insertion path ≧ the inner diameter R of the intermediate recess, and the pillar part of the inner panel. Thickness T <locking groove width Z <
An installation structure of a pillar garnish with a built-in airbag, which is 3T. 5. The method according to claim 1, wherein
A mounting structure for a pillar garnish with a built-in airbag, wherein a covering member for covering a side outer peripheral surface of a shaft portion of the rod-shaped fixing bracket is made of resin. 6. The rod-shaped fixing bracket according to claim 5, wherein one end side of the rod-shaped fixing bracket has a head portion having a diameter larger than that of a shaft portion, and the outer periphery thereof is covered by the covering member. A mounting structure for a pillar garnish with a built-in airbag, wherein the mounting member is embedded in a seat protruding from a back surface of the pillar garnish together with a member.