JP3237429B2 - Mounting structure of mounting member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a mounting member suitable for mounting a relatively elongated mounting member such as a resin bumper for automobiles or a garnish on a vehicle body panel.

[0002]

2. Description of the Related Art Conventionally, an automobile bumper is fixed to a vehicle body panel by fixing parts such as bolts. For example, in the case of the conventional example shown in FIG. 6, a screw grommet b inserted into the vehicle body panel a and a tapping screw c screwed into the screw grommet b,
The mounting member d is attached to the vehicle body panel a.
Further, the mounting member d is attached to the vehicle body panel a using a resin clip e as in the conventional example shown in FIG. 7, or the mounting member d using a stepped bolt f and a nut g as shown in FIG. Are also known.

[0003]

However, since the mounting member made of a synthetic resin such as a resin bumper has a considerably higher coefficient of thermal expansion than the body panel made of a sheet metal, it is difficult to mount the member, for example, when exposed to the hot sun in summer. Assuming the amount of thermal expansion when the mounting member becomes high in temperature, displacement of the body panel and the mounting member during thermal expansion becomes a problem. For example, a normal-sized resin bumper causes thermal expansion of about 3 mm on each of the left and right sides at a high temperature.

For example, in the conventional example shown in FIG. 6, the body panel a and the mounting member d are rigidly restrained by the tapping screw c. It has no function of absorbing thermal expansion. Therefore, in a long mounting member d such as a resin bumper, a deformation occurs such that a central portion in the longitudinal direction swells outward,
It causes the appearance quality to be significantly impaired. Also, since the tapping screw c is screwed into the screw grommet b in a posture inclined by an amount corresponding to the lead angle of the screw thread,
There is also a problem that the fastening force is offset in the circumferential direction.

On the other hand, the resin clip e shown in FIG. 7 has a problem in reliability depending on the place of use, such as weak fastening force and easy detachment. A stepped bolt f as shown in FIG.
Can exert a restraining force on the vehicle body panel a such that the mounting member d is prevented from lifting, but hardly exerts a restraining force in a plane direction (left and right direction in the figure). The function of fixing d is insufficient. In addition, none of the above-mentioned conventional examples can fulfill the function of sufficiently absorbing the difference in thermal expansion between the vehicle body panel a and the mounting member d.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to sufficiently absorb a relative displacement caused by thermal expansion of a mounting member such as a resin bumper with respect to a vehicle body panel, and furthermore, to realize a thickness direction and a surface direction of the mounting member. It is an object of the present invention to provide a mounting structure of a mounting member that can exert a binding force on both.

[0007]

A mounting structure of the present invention developed to achieve the above object has a mounting member having a screw insertion hole through which a screw member is inserted, and a mounting member provided at a position corresponding to the screw insertion hole. A vehicle body panel having a mounting hole for mounting the mounting member, a base inserted into the mounting hole of the vehicle body panel and having a long hole along a surface direction of the vehicle body panel, and integrally extending from the base. A clip member having a bifurcated leg for inserting the mounting hole, a screw member inserted into the screw insertion hole of the mounting member and a long hole of the base of the clip member, and protruding from the rear side of the vehicle body panel; ; and a nut member for pressing the leg portion to the vehicle body panel by being disposed between Jo leg and screwed with the screw member, in the bifurcated legs, the Na
The nut guide part on which both sides of the
The nut member is provided in the same direction as the slot
Characterized by being supported movably along the id part

The clip member is made of a resin having a certain degree of flexibility and a suitable mechanical strength, such as a nylon resin, so that the bifurcated leg can be deformed in the direction in which it spreads. Is suitable, but the material may be appropriately selected according to the required specifications and the like.

[0009]

In the mounting structure according to the present invention, the clip member is previously inserted into the mounting hole of the vehicle body panel when the mounting member such as the resin bumper is fixed to the vehicle body panel. Also,
The nut member is located between the legs of the clip member. In this state, the mounting member is overlapped from the outside of the vehicle body panel, the screw member is passed through the screw insertion hole of the mounting member and the long hole of the base of the clip member, and the screw member is screwed to the nut member while searching for the position of the nut member. .

When the nut member is pulled in the direction of the base of the clip member by rotating the screw member in the tightening direction, the legs are deformed by the nut member in a direction in which the legs spread. When the clip member presses the vehicle body panel in this manner, the mounting member is fixed to the vehicle body panel.

[0011] In this case, the nut member is connected to the nut nut.
Since the screw member, the nut member, and the mounting member can move in the direction along the long hole of the clip member by being able to move along the guide portion, displacement due to thermal expansion of the mounting member occurs in the plane direction of the vehicle body panel. Occasionally, the load in this direction overcomes the fastening force of the clip member, thereby allowing the mounting member to move in the surface direction, thereby absorbing the relative displacement between the vehicle body panel and the mounting member. In addition, a sufficient fastening force is exerted in the thickness direction of the mounting member, and an appropriate fastening force is exerted also in the surface direction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 2 shows an automobile resin bumper as an example of the mounting member 10. The mounting member 10 is an integrally molded product of, for example, a synthetic resin such as polypropylene, and has an elongated shape that extends mainly in the width direction of the vehicle body. Terminal fixing portions 11 are provided at both ends of the mounting member 10. The terminal fixing part 11 is rigidly fixed to the vehicle body side by a fixing part 12 such as a tapping screw.

At the longitudinally intermediate portion of the mounting member 10,
A mounting portion 15 according to the present invention is provided. As shown in FIG. 1 and the like, the mounting portion 15
The mounting member 10 is fixed to the outer surface side of the vehicle body panel 23 by a screw member 21, a nut member 22, and the like. The nut member 22 has a substantially trapezoidal shape.

The mounting member 10 is provided with a screw insertion hole 25 through which the screw member 21 passes. Screw insertion hole 2
5 is a washer 2 of the screw member 21 so as not to be seen from the outside.
6 so that it can be hidden. That is, the screw insertion hole 25 is a round hole having an inner diameter slightly larger than the shaft portion 27 of the screw member 21, and the screw member 21 substantially moves in the radial direction when inserted into the screw insertion hole 25. Be bound.

The vehicle body panel 23 is made of sheet metal, and has a rectangular mounting hole 30 for inserting the clip member 20 at a position corresponding to the screw insertion hole 25. The length L1 and the width W1 of the attachment hole 30 are determined according to the shape and size of the clip member 20 as described later.

The clip member 20 is an integrally molded product of a synthetic resin, and includes a base 36 having a long hole 35 and forked legs 37 and 38 integrally extending from the base 36. The base 36 has a flange-shaped peripheral edge 40. The long hole 35 extends in the longitudinal direction of the mounting member 10 (the longitudinal direction of the bumper).

The vertical width L2 of the legs 37, 38 is
It is slightly shorter than the length L1 of 0. Width W of legs 37, 38
2 is slightly larger than the width W1 of the mounting hole 30. In addition, a neck portion 41 having a width smaller than the width W1 of the mounting hole 30 is provided near the root portions of the leg portions 37 and 38, that is, near the back surface of the base portion 36.
When the legs 37 and 38 are fully inserted into the mounting hole 30, the neck 41 enters the inner peripheral edge 42 of the mounting hole 30. Also,
A rib 43 is provided so that the attachment hole 30 can be more strongly contacted with the inner peripheral edge 42.

Between the legs 37, 38, there are legs 37, 38.
Are provided in such a manner that the slits 45 can bend in directions in which they come and go. Also, the legs 37, 38
Elongated hole-shaped nut guide portions 50 and 51 with which both side portions 47 and 48 of the nut member 22 can be provided are provided. The nut guide portions 50 and 51 are formed along the longitudinal direction of the mounting member 10 similarly to the long hole 35 of the base 36.

As shown in FIG.
The slopes 47a and 48a of both sides 47 and 48 are
It is arranged between the legs 37 and 38 in a posture facing the side. By inserting both side portions 47 and 48 of the nut member 22 into the nut guide portions 50 and 51, the clip member 20 is prevented from dropping from the leg portions 37 and 38, and the nut member 22 is fixed to the nut guide portions 50 and 51. It can be moved in the length direction.

Next, the operation of the mounting portion 15 using the clip member 20 will be described. As shown in FIG.
The clip member 20 is previously attached to the mounting hole 30
Insert it in. In this case, the inner peripheral edge 42 of the mounting hole 30
Is fitted to the neck 41 of the clip member 20, so that the clip member 20 can be temporarily fixed to the vehicle body panel 23.

The legs 37, 38 of the clip member 20
The nut member 22 is put between them. In this case, both side portions 47 and 48 of the nut member 22 are connected to the nut guide portions 50 and
51, the nut member 22 is
0 without falling off, and the nut guide 5
It can move along 0,51.

The mounting member 10 is overlapped from the outside of the vehicle body panel 23, and the screw member 21 is passed through the screw insertion hole 25 of the mounting member 10 and the elongated hole 35 of the clip member 20. Further, while searching for the position of the nut member 22, the screw member 21 is connected to the nut member 2.
Screw into 2. Since the nut member 22 is sandwiched between the legs 37 and 38, the nut member 22 does not rotate together when the screw member 21 is rotated.

When the screw member 21 is rotated in the tightening direction, the nut member 22 is drawn in the direction of the base portion 36, and as shown in FIG.
48a pushes the bifurcated legs 37, 38 in a direction of spreading like a wedge. For this reason, the base 36 of the clip member 20
The body panel 23 is pressed between the armature and the legs 37 and 38, and the upper end of the rib 43 also pushes the body panel 23 from the back side toward the peripheral portion 40 of the base 36. 23 and the mounting member 10 are restrained from each other in the plate thickness direction, and a restraining force is exerted against a load along the surface direction of the mounting member 10.

The mounting member 10 is
Although the screw member 21 and the nut member 22 cannot substantially move relative to each other in the plane direction, the screw member 21 and the nut member 22
It is possible to move in the direction along. For this reason, as shown in FIG. 3, the mounting member 10 can move in the arrow A direction or the arrow B direction together with the screw member 21 and the nut member 22 with respect to the vehicle body panel 23. For this reason, the mounting member 1
The relative displacement due to the extension of 0 in the longitudinal direction can be absorbed in the length range of the long hole 35 by the balance between the load due to the extension in the surface direction and the fastening force of the clip member 20, and may cause poor appearance at high temperatures. The deformation of the mounting member 10 can be avoided.

To remove the mounting member 10 from the vehicle body panel 23, the screw member 21 and the nut member 22 may be unscrewed by rotating the screw member 21 in a direction opposite to the above. Also in this case, both side portions 47 of the nut member 22,
Since the nut 48 enters and is held by the nut guide portions 50 and 51, it is possible to prevent the nut member 22 from dropping from the clip member 20 carelessly.

Further, according to the above-described mounting structure, the problem that the screw member is inclined by an amount corresponding to the lead angle of the screw thread, which is observed when the conventional tapping screw is tightened (FIG. 6), is avoided. A uniform fastening force is exerted in the circumferential direction.

The mounting structure of the mounting member of the present invention is not limited to a resin exterior material other than the bumper, for example, a synthetic resin garnish provided on the rear surface of the vehicle body and extending in the vehicle width direction, a resin aero part such as a spoiler, a grill or In short, it can be suitably used for a mounting member having a large elongation due to thermal expansion, such as a body-related component such as a side protector.

[0028]

According to the present invention, the mounting member to be mounted on the vehicle body panel can be reliably restrained in the thickness direction, and a certain restraining force can be exerted in the surface direction. Can be absorbed, and appearance defects due to thermal deformation of the mounting member can be prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a mounting member mounting structure according to an embodiment of the present invention.

FIG. 2 is a front view of an automobile resin bumper as an example of a mounting member.

FIG. 3 is a sectional view of the mounting structure of the mounting member shown in FIG. 1;

FIG. 4 is a sectional view taken along line VV in FIG. 3 before a screw member is tightened;

FIG. 5 is a sectional view taken along the line VV in FIG. 3 after the screw member is tightened.

FIG. 6 is a perspective view showing a conventional mounting member mounting structure.

FIG. 7 is a sectional view of a mounting structure showing another conventional example.

FIG. 8 is a sectional view of a mounting structure showing still another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Mounting member 15 ... Mounting part 20 ... Clip member 21 ... Screw member 22 ... Nut member 23 ... Body panel 25 ... Screw insertion hole 30 ... Mounting hole 35 ... Long hole 36 ... Base 37, 38 ... Leg 43 ... Rib 45 ... Slits 50,51 ... Nut guide

Claims (6)

(57) [Claims] 1. A mounting member having a screw insertion hole for passing a screw member, a vehicle body panel having a mounting hole for mounting the mounting member at a position corresponding to the screw insertion hole, and the mounting of the vehicle body panel A clip member having a base inserted into the hole and having a long hole extending along the surface direction of the vehicle body panel, and a bifurcated leg integrally extending from the base and penetrating the mounting hole; A screw member inserted into the screw insertion hole and the elongated hole at the base of the clip member and projecting to the rear side of the vehicle body panel; and the leg provided by being interposed between the bifurcated legs and screwing with the screw member. A nut member for pressing a portion of the nut member against the vehicle body panel, and both sides of the nut member engage with the forked leg portion.
Nut guide in the same direction as the slot
The nut member can move along the nut guide
A mounting structure for a mounting member, which is supported . 2. The nut member has a substantially trapezoidal shape.
The mounting structure for a mounting member according to claim 1, wherein the slopes on both sides of the nut member enter the nut guide portion. 3. The mounting structure according to claim 1, wherein said clip member is made of synthetic resin. 4. The mounting member mounting structure according to claim 1, wherein said mounting member is an automobile resin bumper. 5. A long hole of a base of the clip member is formed along a longitudinal direction of the bumper.
A mounting structure for the mounting member according to claim 4 . 6. The mounting member mounting structure according to claim 1, wherein said mounting member is a garnish made of synthetic resin for automobiles.