JPH1163235A - Packing absorbing curvature difference of mounting surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide packing that exhibits less deformation in appearance even upon absorbing differences in curvature of a mounting surface. SOLUTION: Packing 11 is adapted to be interposed between an object 3 to be mounted and a mounting surface 2 while absorbing differences in curvature of the mounting surface 2. The packing 11 comprises a planar middle part 11c, on which the object 3 is mounted, a movable part 11b slanted downward from the middle part 11c, and a circumferential part 11a made thicker than the movable part 11b so as to encircle it. The movable part 11b thus slanted in relation to the middle part 11c keeps space 12 between itself and the mounted object 3, which space absorbs differences in curvature of the mounting surface 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing inserted between a mounting object and a mounting surface on which the mounting object is mounted, and more particularly, to a structure for absorbing a curved surface using the packing. .

[0002]

2. Description of the Related Art When mounting an object to be mounted on a mounting surface, a packing is often inserted between the mounting object and the mounting surface. If the mounting surface is a curved surface, the packing requires a structure for absorbing the curved surface. Conventionally, as a structure for absorbing a curved surface, for example, a small skirt-shaped rib having a triangular cross-section called a lip is provided on the entire outer periphery of the packing, and the lip is deformed by crimping at the time of mounting. The difference in the curvature of the curved surface of the mounting surface was absorbed. Hereinafter, the curved surface absorbing structure in the conventional packing will be described with reference to FIG.

FIG. 3 (a) is a cross-sectional view showing a state before the conventional packing is mounted, and FIG. 3 (b) is a sectional view showing a state where the mounting object is mounted on the mounting surface using the conventional packing. It is sectional drawing.

The packing 1 is, as shown in FIG.
A lip 1a is formed on the outer periphery. Lip 1a
Has a shape extending thinly in a skirt shape obliquely with respect to a surface that comes into contact with the mounting surface of the packing 1, and the packing 1
And are integrally molded.

When the mounting object 3 is mounted on the mounting surface 2, the packing 3 is fixed with screws 4 or the like with the packing 1 interposed therebetween. At this time, the packing 1 is crimped to the mounting surface 2 so that, as shown in FIG.
Are deformed so as to open outward, and absorb the curved surface of the mounting surface 2 (absorb the difference between the shape of the contact surface of the mounting object 3 and the shape of the mounting surface 2).

[0006]

However, the amount of deformation of the lip 1a of the packing 1 changes according to the curvature of the mounting surface 2. For this reason, when a general-purpose packing that can cope with mounting surfaces having various curvatures is made, if the mounting surface 2 is a gentle curved surface or a flat surface, the lip 1
a becomes large, and in some cases, the lip 1a
However, there is a possibility that a distorted deformation may occur such that the upper surface warps upward with respect to the mounting surface 2. Such irregular deformation of the appearance is particularly remarkable in a small packing.
As a matter of course, if the packing is designed according to the shape of the mounting surface, the above-mentioned irregular deformation can be avoided, but in this case, there arises a problem that the manufacturing cost is necessarily increased. As described above, in the packing having the conventional shape, it cannot be practically used for mounting surfaces having various curvatures.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a packing having a small external deformation even if the difference in curvature between various curved surfaces of the mounting surface is absorbed.

[0008]

SUMMARY OF THE INVENTION In a packing inserted between a mounting object and a mounting surface on which the mounting object is mounted, the packing is made thicker in order to reduce the amount of deformation of the packing outer periphery. An inner portion along the outer periphery of the packing is formed so as to have a space between the mounting object and the packing away from the mounting object relative to a center portion of the packing; When the is mounted on the mounting surface with the packing interposed therebetween, the inner portion along the outer periphery is deformed according to the difference in the curvature of the surface of the mounting surface, and the space is expanded or contracted to absorb the difference in the curvature.

According to the structure of the present invention, the object to be mounted is fixed to the mounting surface with the packing interposed therebetween by fixing means such as screws, so that the inner part of the outer periphery of the packing is movable in the space, Even if the difference in curvature of the curved surface of the mounting surface is absorbed, deformation of the outer periphery of the packing can be reduced.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram illustrating a structure for absorbing a curved surface in a packing according to an embodiment of the present invention. FIG. 1A is a cross-sectional view of a state before the packing according to the embodiment is attached. (b) is a cross-sectional view of the packing in a state where the mounting target is mounted on the mounting surface using the packing of the present embodiment.

In FIG. 1A and FIG. 1B, a mounting surface 2 has sufficient strength to mount a mounting target 3 to be described later, such as a frame or an interior panel of a moving body such as an automobile. But the surface is not necessarily flat,
This is a surface formed by curved surfaces of various curvatures.

The mounting object 3 may be, for example, an electronic device such as a voltage converter or a DC / AC converter in a moving body, or a mechanical component such as a handle or a hook. It has mechanical strength that does not break even when tightened and fixed. The screw 4 is the most common screw or bolt as a fixing means. In the case of a normal screw or bolt, the mounting surface 2 is provided with a threaded thread corresponding to the screw 2 in advance. When the screw 4 itself is a tapping screw or the like, a screw is cut on the inner surface of the mounting surface 2 at the same time as a hole is formed in the mounting surface 2 to tighten the screw.

The packing 11 is formed of an elastic material such as rubber having excellent durability and non-migration properties. In a thick part of the material, the amount of deformation is small because the force required for deformation is large, but in a part where the material is not so thick, the force required for deformation is not so large, so that the material is deformed according to the force applied to the part.

The outer peripheral portion 11a is formed so as to have a thickness sufficient to suppress deformation unlike a thin shape such as the lip 1a shown in the prior art, which is easily deformed. The movable part 11b is a packing 1 fixed with screws 4.
1 so as to gradually descend from the central portion of the packing 11 toward the outer peripheral portion 11a, that is, a space 17 to be described later is gradually separated from the central portion of the packing 11 toward the outer peripheral portion 11a from the mounting object 3. Is formed. The thickness of the movable portion 11b is such that it has sufficient strength as a packing, and is movable (moves upward and downward in the figure) in accordance with a change in the curvature of the mounting surface 2.

The space 12 is formed such that the movable portion 11b extends obliquely with respect to the central portion 11c of the packing 11, so that the mounting object 3 is attached when the object 3 is brought into contact with the undeformed packing. This is a gap formed between the object 3 and the movable part 11b. As will be described later, the space 12 plays an important role in absorbing a difference in the curvature of the mounting surface 2.

As described above, at the stage before the packing 11 is crimped to the mounting surface 2, as shown in FIG. 1A, there is a space 12 between the packing 11 and the mounting target portion 3. When the packing 11 is crimped to the mounting surface 2, as shown in FIG.
Is deformed to move relatively upward, and space 1
2 disappears or becomes smaller. In this state, the packing 11 is in close contact with the mounting surface 2.

FIG. 2 shows an outer peripheral portion 11a and a movable portion 11b.
FIG. In FIG. 2, the packing 11 indicated by a hatched portion is in a state where the packing 11 is not pressed against the mounting surface, or in a state where the curvature of the mounting surface substantially matches the contact surface of the packing 11 before deformation. 11 is shown. In this case, as described above, the movable portion 11b is
Because it is formed to extend diagonally to
A space 12 is formed between the mounting object 3 and the movable part 11b.

When the packing 11 is pressed against a flat or curved mounting surface having a very small curvature, the movable portion 11 is pressed.
b is deformed so that the outer peripheral portion 11a becomes
Move to a position a '. Accordingly, the movable portion 11b 'moves in a direction in which the movable portion 11b' comes into close contact with the mounting target 3, and the space 12 is reduced or eliminated. In the drawing, the amount of change in the position of the outer peripheral portion 11a in the direction of the mounting surface is set as ΔX on the X axis, and the amount of change in the position of the outer peripheral portion 11a in the direction perpendicular to the mounting plane is set as ΔY on the Y axis.

As described above, the difference in the curvature of the mounting surface is absorbed by the vertical movement of the movable portion 11b. Therefore, the amount of movement of the outer peripheral portion 11a accompanying this becomes slightly large in the Y direction (direction perpendicular to the mounting surface), but becomes very small in the X direction (direction along the mounting surface). Therefore, almost no change in the appearance of the packing is observed. Even when ΔX / ΔY is considered as the amount of change in the outer peripheral portion 11a of the packing 11 according to the difference in the curvature of the surface of the mounting surface, the amount of change can be suppressed to a small value.

With the above-described configuration, in the present embodiment, even if the difference in curvature between various surfaces of the mounting surface is absorbed,
It is possible to provide a packing with less deformation that opens to the outside of the appearance.

[0021]

According to the present invention, the outer peripheral portion of the packing is deformed to eliminate the deformed portion, and is made thicker, and a space is provided between the object to be mounted and the packing inside the outer peripheral portion of the packing. It is possible to provide a packing in which the appearance of the packing is not deformed irregularly even if the difference in the curvature of the mounting surface is absorbed.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a structure for absorbing a curved surface in packing according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating movement of an outer peripheral portion 11a and a movable portion 11b.

FIG. 3 is a view for explaining a structure for absorbing a curved surface in a conventional packing.

[Explanation of symbols]

 2 mounting surface 3 mounting object 11 packing 11a outer peripheral portion 11b movable portion 17 space

Claims (3)

[Claims] 1. A packing inserted between a mounting object and a mounting surface on which the mounting object is mounted, wherein the thickness of the outer peripheral portion is increased in order to reduce the amount of deformation of the outer peripheral portion of the packing. Along with, the inner portion along the outer peripheral portion is formed so as to be more separated from the mounting object than the center portion of the packing and to have a space between the mounting object and the packing, At the time of mounting on the mounting surface with the packing interposed, the inner portion along the outer peripheral portion is deformed according to the difference in curvature of the mounting surface, and the space expands and contracts to absorb the difference in curvature. A packing that absorbs the difference in the curvature of the mounting surface. 2. The curved surface absorbing space is configured such that a surface of the packing facing the mounting object gradually separates from the mounting object from a center of the packing toward an outer peripheral portion. The packing for absorbing a difference in curvature of a mounting surface according to claim 1, wherein the packing is provided. 3. A packing inserted between a mounting object and a mounting surface on which the mounting object is mounted, wherein the packing is provided so as to surround a flat central portion and the central portion. A packing comprising: a movable portion formed to extend obliquely with respect to the movable portion; and an outer peripheral portion provided to surround the movable portion and formed to be thicker than the movable portion.