JPH04297384A - Mounting structure of resin fender for automobile - Google Patents

Abstract

PURPOSE:To provide a mounting structure for such an automobile resin fender that is able to forcibly prevent an upper edge member of the plastic fender from being bulged and deformed even under such an amboence where outside temperature goes very high. CONSTITUTION:An upper edge part 15a of a front fender (resin fender) 115 is rectilinearly formed toward in front and in the rear, and a mounted part 16 is solidly in this upper edge part 15a toward the lower part. This mounted part 16 is rectilinearly formed toward the front and rear, and it is interposed between a retainer 17 extending in front and in the rear and a car body 10. The retainer 17 is clamped to the car body 10 with a bolt 18, pressing down the mounted part 16 to the car body 10 rectilinearly.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention is an automotive resin fender mounting structure for attaching a resin fender with a different coefficient of thermal expansion to a car body so that the resin fender will not be distorted even if there is a change in outside temperature. It is related to.

0002

[Prior Art] As an example of the mounting structure of this type of automobile resin fender, there is shown in FIG.
There are some examples as shown in (see Publication No.).

In the mounting structure shown in FIG. 6, the upper part of the resin fender 1 is curved toward the engine room 2, and an attached part 3 having an L-shaped cross section facing downward is formed at the upper edge of the resin fender 1. A long hole 4 extending back and forth is formed in the horizontal portion 3a of the attached portion 3. Although only one elongated hole 4 is shown in FIG. 6, in reality, a large number of elongated holes 4 are formed at equal pitches in the front and rear.

Moreover, the resin fender 1 can be fixed by inserting a cylindrical spacer 5 into the elongated hole 4 and screwing the bolt 6 inserted through the spacer 5 into the fixing nut 8 of the hood ridge panel 7 on the vehicle body side. Hood ridge panel 7 on the vehicle side
I am trying to attach it to.

In such a configuration, the resin fender 1 and the hood ridge panel 7 have a large difference in coefficient of thermal expansion, but the resin fender 1 moves back and forth with respect to the hood ridge panel 7 as the outside temperature changes. However, this movement is allowed by the action of the elongated hole 4 and the spacer 5.

[0006]

[Problem to be Solved by the Invention] However, in an environment where the outside temperature is extremely high, the resin fender 1 expands and the gap between the elongated hole 4 and the spacer 5 disappears, making it difficult for the relative movement to occur smoothly. , the mounting part becomes fixed, and the horizontal part 3a and the upper edge of the hood ridge panel 7 that are not fixed absorb the expansion, so that the horizontal part 3a and the upper edge of the hood ridge panel 7 There was a problem in that the bolts 6 were bulged upward and deformed, resulting in poor appearance.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a mounting structure for a resin fender for an automobile that can forcibly prevent the upper edge of the resin fender from expanding and deforming even in an environment where the outside temperature is extremely high. This is the purpose.

[0008]

[Means for Solving the Problem] In order to achieve this object, the invention according to claim 1 is such that the upper part of the resin fender is curved toward the engine room side, and the upper edge of the resin fender is curved toward the front and rear. It is formed in a straight line, and
In the mounting structure for a resin fender for an automobile, a mounting portion is integrally provided at the upper edge of the resin fender facing downward, and the mounting portion is fixed to the vehicle body by a large number of fixing members arranged back and forth. The attached part is formed in a straight line in the front and rear, and the attached part is interposed between the vehicle body and a linear retainer extending in the front and rear, and the retainer is attached to the vehicle body by the fixing member. The present invention is characterized by a mounting structure for an automobile resin fender which is fixed and presses the mounted portion linearly against the vehicle body.

[0009] Furthermore, in the invention according to claim 2, the upper part of the resin fender is curved toward the engine room side, and the upper edge part of the resin fender is formed in a straight line toward the front and rear. In the mounting structure of an automobile resin fender, in which a part to be attached is integrally provided at the upper edge of the fender facing downward, and the part to be attached is attached to the vehicle body, the part to be attached is arranged in a straight line toward the front and back. and an intermediate member having a linear expansion coefficient formed between the resin fender and the vehicle body is interposed between the attached part and the vehicle body. It is characterized by:

0010

[Operation] According to the invention of claim 1, the linear attached portion of the resin fender is sandwiched between the linear retainer and the vehicle body, so that the attached portion of the resin fender is sandwiched between the linear retainer and the vehicle body, so that the attached portion of the resin fender is held between the linear retainer and the vehicle body. By suppressing the thermal expansion deformation of the mounting part and forcibly maintaining the linear state, distortion due to thermal expansion between the fixed members of the mounted part will not act on the linear upper edge of the resin fender. The straightness of this upper edge is maintained.

According to the second aspect of the invention, the difference in thermal expansion between the attached part and the vehicle body increases as the outside air temperature increases, but the difference in thermal expansion between the attached part and the intermediate member increases. Also, the difference in thermal expansion between the intermediate member and the vehicle body becomes smaller.

[0012] As a result, even if there is a large difference in thermal expansion between the vehicle body and the attached part, the resin fender can be attached to the vehicle body in a state in which this large difference in thermal expansion can be absorbed by the intermediate member. This will suppress the bulging deformation of the area. Also, by pressing in a straight line, the bulging deformation also becomes straight.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to FIGS. 1 to 5.

[First Embodiment] FIGS. 1 to 4 illustrate a first embodiment of a mounting structure for an automobile resin fender according to the present invention.

In FIG. 4, 10 is a car body; 11 is a car body;
F is an engine room provided at the front of the vehicle body 10, and F is a hood ridge made of a steel plate, which is a part of the vehicle body 10.

As shown in FIG. 1, the hood ridge F has a hood ridge rain hose 12 and a hood ridge panel 13 whose upper edge 13a is welded and fixed to the hood ridge rain hose 12. In the figure, 13b is a wheel house provided in the hood ridge panel 13.

13c is a joint between the hood ridge rain hose 12 and the hood ridge panel 13, and this joint 13c
is formed in a linear and planar shape toward the front and back.

14 is a hood ridge rain hose 1.
A front fender (resin fender) 15 made of a resin material is disposed on the outside of the hood ridge rain hose 12.

The upper part of this front fender 15 is shown in FIG.
The upper edge 15a of the front fender 15 is curved toward the engine room 11 as shown in FIG. 1(b).
), as shown in FIGS. 2 and 4, it is formed in a straight line over substantially the entire length of the front fender 15 in the front and rear direction. Furthermore, a downwardly directed mounting portion 16 is integrally formed on the upper edge portion 15a of the front fender 15 over substantially the entire length of the front fender 15, as described above.

The attached portion 16 includes a linear standing wall portion 16a extending back and forth along the upper edge portion 15a, and a standing portion 16.
It has a horizontal wall portion 16b connected to the lower edge of a toward the engine room 11 side. This horizontal wall portion 16b is formed in a straight, flat plane extending from front to back.

Moreover, the horizontal wall portion 16b is interposed between the retainer 17, which is formed in a flat, linear shape in the front and rear directions, and the joint portion 13c of the vehicle body 10. Further, the retainer 17 is fixed to the joint portion 13c with fixing members such as a mounting bolt 18 and a weld nut 19, and presses the horizontal wall portion 16b in a straight line. In FIG. 2, 16c is a bolt insertion hole provided in the side wall 16b, and 17a is a bolt insertion hole provided in the retainer 17. In addition, the weld nut 19 is attached to the hood ridge rain hose 12 corresponding to each bolt insertion hole 16c.
It is fixed by welding.

Next, the operation of such a configuration will be explained.

The above-mentioned front fender 15 is formed from a resin material with a coefficient of linear expansion of approximately 9.0×10-5/deg, and this front fender 15 is attached to the vehicle body using the conventional mounting structure shown in FIG. In this case, as shown in FIG. 3, in the front fender 15, the side wall portion 16b and upper edge portion 15a of the portion other than the fixed portion expand upward between the mounting bolts as shown by the broken line at the attached portion and the upper edge portion. It will become deformed and the appearance will be spoiled.

However, according to the configuration of the present invention, the linear attached portion 16 of the front fender 15 is sandwiched between the linear retainer 17 and the joint portion 13c on the vehicle body 10 side. By suppressing the thermal expansion deformation of the attached part 16 due to a large rise in outside air temperature and forcibly maintaining the straight state, distortion due to thermal expansion between the mounting bolts (fixing members) 18 of the attached part 16 is reduced. By being pressed down, it no longer acts on the linear upper edge 15a of the front fender 15, and the linearity of this upper edge 15a is maintained.

[Second Embodiment] FIG. 5 shows a second embodiment of the present invention.

In this embodiment, a downwardly directed mounting portion 20 is integrally formed on the upper edge 15a of the front fender 15 described above. This attached portion 20 is formed in a straight line toward the front and back.

Further, between the attached part 20 and the joint part 13c on the vehicle body 10 side, there is an intermediate member 21 whose linear expansion coefficient is intermediate between the front fender 15 and the joint part 13c on the vehicle body 10 side. It is arranged. This intermediate member 21 has an L-shaped cross section formed by an upright wall 21a and a horizontal wall 21b.

The upright wall 21a is fixed to the attached part 20 with mounting bolts 22 and nuts 23, and the horizontal wall 21b is fixed to the joint 13c on the vehicle body 10 side with mounting bolts 24 and nuts 25.

Here, it is preferable that the hood ridge F, front fender 15, intermediate member 21, etc. of the vehicle body 10 be formed of a material having the following linear expansion coefficient, for example.

(1). Front fender 15 Synthetic resin 9.0×10-5/deg (2)
．． Intermediate member 21 Aluminum 4.5×10-5/deg (3). Hood Ridge F (vehicle body) Steel plate
1.15×10-5/deg In the case of such a material, the difference in linear expansion coefficient between (1) and (2) is 4.5×10-5/deg.
deg, and the difference in linear expansion coefficient between (2) and (3) is 3.3
It becomes 5×10-5/deg. Note that the intermediate member 21 includes
Asdel™ and other materials may also be used. In this case, the materials for the intermediate member 21 are (1) and (
2) and the difference in linear expansion coefficient between (2) and (3) is approximately 3 to 5×1
Metals, as long as they fall within the range of 0-5/deg.
Can be used regardless of non-metal.

According to such a configuration, as the outside air temperature increases significantly, the difference in thermal expansion (linear expansion coefficient difference) between the attached part 20 and the hood ridge F on the vehicle body 10 side increases; The difference in the amount of thermal expansion between the portion 20 and the intermediate member 21 and the difference in the amount of thermal expansion between the intermediate member 21 and the hood ridge F become smaller.

[0032] As a result, the hood ridge F and the attached part 2
Even if the difference in thermal expansion from 0 is large, the hood ridge F is attached to the hood ridge F in such a manner that this large difference in thermal expansion can be absorbed by the intermediate member 21, and the upper edge 15a of the front fender 15, which is a resin fender. This means that the bulging deformation of is kept small.

[0033]

[Effect] As explained above, according to the invention of claim 1, since the linear attached part of the resin fender is sandwiched between the linear retainer and the vehicle body, Thermal expansion deformation of the attached part is suppressed, and the attached part is forced to maintain a straight state. This prevents distortion due to thermal expansion between the fixing members of the attached part from acting on the straight upper edge of the resin fender, and maintains the straightness of this upper edge, so it is possible to prevent the rise in outside air temperature. Accordingly, damage to the appearance of the resin fender is prevented.

Further, according to the second aspect of the present invention, an intermediate member having a linear expansion coefficient formed between the resin fender and the vehicle body is interposed between the attached part and the vehicle body, so that external air can be removed. As the temperature increases, the difference in thermal expansion between the attached part and the vehicle body increases, but the difference in thermal expansion between the attached part and the intermediate member and the difference in thermal expansion between the intermediate member and the vehicle body decrease. As a result, even if there is a large difference in the amount of thermal expansion between the vehicle body and the attached part, the resin fender is attached to the vehicle body in a state where this large difference in thermal expansion can be absorbed by the intermediate member, and the upper edge of the resin fender is deformed by bulging. As a result, the appearance of the resin fender is prevented from being damaged due to a rise in the temperature of the outside air.

[Brief explanation of the drawing]

[Fig. 1] (a) is a sectional view of essential parts of the present invention, (b) is (a)
) is a plan view of

FIG. 2 is an exploded perspective view of the retainer and front fender of FIG. 1.

FIG. 3 is an explanatory diagram of the operation of FIG. 1;

FIG. 4 is a partially cutaway explanatory view of an automobile having the structure shown in FIGS. 1 to 3. FIG.

FIG. 5 is a sectional view of a main part showing another embodiment of the present invention.

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

[Explanation of symbols]

10...Vehicle body F...Hood ridge (part of the vehicle body) 13c...Joint part 15...Front fender (resin fender) 16...Attachment part 17...Retainer 18...Mounting bolt

Claims (2)

[Claims] Claim 1: The upper part of the resin fender is curved toward the engine room side, and the upper edge of the resin fender is formed in a straight line toward the front and back. In the mounting structure of an automobile resin fender, in which a mounted part is integrally provided toward the vehicle body, and the mounted part is fixed to the vehicle body by a number of fixing members arranged front and rear, the mounted part is fixed in a straight line toward the front and rear. The attached part is interposed between the vehicle body and a linear retainer that extends back and forth, and the retainer is fixed to the vehicle body by the fixing member so that the attached part is connected to the vehicle body. A mounting structure for automotive resin fenders that is pressed linearly against the vehicle body. 2. The upper part of the resin fender is curved toward the engine room side, and the upper edge of the resin fender is formed in a straight line toward the front and back, and the upper edge of the resin fender has a downwardly curved shape. In the mounting structure of an automobile resin fender, in which a mounted part is integrally provided toward the vehicle body, and the mounted part is attached to the vehicle body, the mounted part is formed in a straight line toward the front and rear, and 1. A mounting structure for a resin fender for an automobile, characterized in that an intermediate member having a linear expansion coefficient formed between the resin fender and the vehicle body is interposed between the mounting portion and the vehicle body.