JP2004019896A - Joining structure between hard joined member and elastic joining part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joining structure between a hard joined member having improved fitting holes and an elastic joining part. <P>SOLUTION: In this joining structure between the hard joined member and the elastic joining part, bar-like projections 17 projectedly formed on the joining surface of an elastic rubber-like joining part 16 are forcibly fitted into the fitting holes 15 formed in the joined member 1, and the large diameter flange parts 17b of the bar-like projections are engagedly connected to the bottom peripheral edge parts 14a of the fitting holes. The fitting holes 15 formed in the hard joined member 1 are formed in such a size as allows the bar-like projections 17 to be inserted gently. A plurality of projected parts 14b partly projected on the opening sides of the fitting holes 15 are provided at a distance on the bottom peripheral edge parts 14a of the fitting holes 15. When the bar-like projections of the joining parts are inserted into the fitting holes, the large diameter flange parts of the bar-like projections are supported on the plurality of projected parts, and support the fitted shaft parts 17a of the bar-like projections. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a coupling structure for coupling a rubber-like elastic coupling component to a fitting hole formed in a rigid coupling member made of a hard resin member or the like, and more particularly, to a coupling structure protrudingly formed on a coupling surface of the coupling component. The present invention relates to a coupling structure between a rigid coupling member and an elastic coupling component, the rod-shaped projection shape and the fitting hole of the rigid coupling member being improved.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as shown in a schematic view of FIG. 5 to FIG. 7, a cowl top (COWLTOP) 1 which is a member to be coupled located outside a windshield of an automobile, as shown in a schematic view of FIG. The hinge cover 4 that covers the hinge portion 3 of the bonnet 2 connected to both sides of the hood 2 uses a rubber-like elastic coupling component.
When an elastic coupling component is coupled to the coupling member formed of the resin material, the elastic coupling component is formed so as to protrude from a coupling surface 4a of the elastic coupling component in a penetrating fitting hole 5 formed in the coupling member. The rod-shaped projection 6 is forcibly fitted into the fitting hole 5 and is joined by locking the large-diameter flange 6a of the rod-shaped projection 6 to the bottom peripheral edge 5a of the fitting hole 5.
[0003]
[Problems to be solved by the invention]
However, according to the conventional coupling method described above, in order to easily fit the rod-shaped projection 6 of the hinge cover 4 which is a coupling component having elasticity into the fitting hole 5 of the cowl top 1 which is a member to be coupled, It is possible to increase the diameter of the fitting hole 5 to a diameter slightly smaller than the diameter of the large-diameter flange 6a at the center of the rod-shaped projection 6, but in a state where the rod-shaped projection 6 is fitted to the fitting hole 5. In this case, a large gap L is formed between the peripheral wall 5b of the fitting hole 5 and the outer peripheral surface of the fitting shaft portion 6b from the base end of the rod-shaped projection 6 to the large-diameter flange portion 6a. In addition, a gap H is formed on the side surface where the cowl top 1 and the hinge cover 4 are connected to each other, which causes a problem in assembling them.
Therefore, if the diameter of the fitting hole 5 is reduced in order to solve the above problem, the deformation of the large-diameter flange 6a of the bar-shaped projection 6 is increased, so that the tip 6c of the bar-shaped projection 6 must be strongly pulled in and forcedly fitted. However, there is a problem that the bar-shaped projection 6 is not completely resistant to the pulling force and is broken.
[0004]
Furthermore, the plate thickness of the cowl top 1 which is the member to be coupled provided with the fitting hole 5 and the length of the fitting shaft portion 6b from the base end of the rod-shaped projection 6 to the large diameter flange portion 6a are the same in design. However, some errors occur during the molding of the mold, and the rod-shaped projection 6 is necessarily provided at a position completely coincident with the axis of the fitting hole 5 or the length of the rod-shaped projection 6 is cowled. It is difficult to obtain a molded product having the same length as the thickness of the top 1, and a delicate correction of the mold is required each time, and there is a problem that the mold adjustment cost increases.
[0005]
The present invention is intended to solve the above-described problem. A fitting hole formed in a member to be coupled is formed to have a size that allows the rod-shaped protrusion to be loosely inserted, and a bottom surface of the fitting hole is formed. A plurality of protruding portions are provided on the peripheral edge portion, each of which protrudes from the opening side of the fitting hole and protrudes from the bottom surface, and are spaced apart from each other, and the rod-shaped projections of the coupling component are inserted into the fitting hole. In this case, the large-diameter flange portion of the rod-shaped projection is supported by the plurality of ridges, and the fitting shaft of the rod-shaped projection is held to prevent the joint portion from rattling and to improve the mounting workability. It is an object of the present invention to provide a coupling structure between a rigid coupling member and an elastic coupling component that can be used.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is characterized in that a coupling component having rubber-like elasticity is fitted in a fitting hole formed in a coupled member made of a hard resin member, and a rod-shaped projection protrudingly formed on a coupling surface of the coupling component is provided. In the coupling structure of the hard coupling member and the elastic coupling component, which are forcibly fitted into the coupling hole and the large-diameter flange portion of the rod-shaped projection is engaged with the bottom peripheral edge of the coupling hole to be coupled. The fitting hole formed in the hard coupled member is formed to have a size that allows the rod-shaped projection to be loosely inserted, and a part of the fitting hole is formed on the bottom peripheral edge of the fitting hole. A plurality of protrusions protruding from the opening side are provided separately from each other, and when the bar-shaped protrusion of the coupling component is inserted into the fitting hole, the large-diameter flange portion of the bar-shaped protrusion has the plurality of protrusions. It is characterized by being supported by a ridge and holding a fitting shaft of the rod-shaped projection.
[0007]
According to a second aspect of the present invention, in the coupling structure of the hard coupled member and the elastic coupling component according to the first aspect, the coupled component is formed of a PP resin material, and the coupling component is formed of a thermoplastic elastomer or rubber. Characterized by being formed of an elastic material.
[0008]
According to a third aspect of the present invention, in the coupling structure of the hard coupled member and the elastic coupling component according to the first aspect, the fitting shaft portion extending from the base end of the rod-shaped projection to the large-diameter flange portion has a substantially cross-sectional shape. The present invention is characterized in that a convex cutout is formed.
[0009]
According to a fourth aspect of the present invention, in the coupling structure of the hard coupled member and the elastic coupling component according to the first aspect, the protrusion provided on the peripheral edge of the bottom surface of the fitting hole has a circumferential angle of 120 degrees. It is characterized in that it is formed at three places at intervals.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an embodiment of a coupling structure between a rigid coupling member and an elastic coupling component according to the present invention. In this embodiment, a coupling member located outside a front glass of an automobile is used. FIG. 2 is a schematic plan view of an essential part showing a state in which the cowl top is applied to a hinge cover covering a hinge part of a bonnet as a coupling part arranged on both sides thereof. FIG. FIG. 3 is an enlarged sectional view showing a state in which a hinge cover is coupled to the cowl top, and FIG. 4 is a sectional view taken along line BB of FIG.
[0011]
In the figure, reference numeral 10 denotes a cowl top comprising a pair of left and right molded articles, which are members to be connected, located outside the windshield of the automobile, and an end portion of which is fixed to a sheet metal body located between the windshield and the hood of the automobile. In each of the left and right sides of the cowl top 10, there is provided a space 13 in which the hinge 12 of the bonnet 11 is provided. A hinge cover 16 formed of an elastic material such as a thermoplastic elastomer or rubber is connected to an end face portion 14 of the cowl top 10 forming each of the cavities 13.
[0012]
On the back surface of the hinge cover 16, bar-shaped projections 17 are respectively formed to fit into a plurality of vertically extending fitting holes 15 formed at predetermined intervals on the end surface portion 14 of the cowl top 10. .
A notch 18 formed by cutting from the front end side is formed substantially at the center of the hinge cover 16, so that the support rod 12a of the hinge 12 can be inserted to be able to move forward and backward when the hood 11 is opened and closed. I have.
As shown in FIGS. 3 and 4, the bar-shaped projection 17 of the hinge cover 16 has a cutout 17e formed in a shaft portion having the same diameter and extending downward from the base end of the back surface of the hinge cover 16. The fitting shaft portion 17a provided, the large-diameter flange portion 17b having a step at the position of the fitting shaft portion 17a corresponding to the plate thickness T of the fitting hole 15, and the tapered surface 17c reduced from the large-diameter flange portion 17b. A continuous tip knob 17d is formed, and a protruding portion 17f (having a large diameter) whose height gradually increases toward the base end side of the fitting shaft portion 17a is formed. In the state in which the fitting shaft portion 17a is fitted, the gap between them is partially filled.
[0013]
Further, the fitting hole 15 formed in the end face portion 14 of the cowl top 10 is formed such that the hole diameter D is smaller than the large-diameter flange portion 17b of the rod-shaped projection 17 and larger than the diameter of the fitting shaft portion 17a. The flange portion 17b is formed to have a size that allows for gentle insertion with a slight deformation, and a part of the bottom peripheral edge portion 14a of the fitting hole 15 protrudes from the opening side of the fitting hole 15. A plurality of protrusions 14b protruding from the bottom peripheral edge 14a are provided separately from each other, and when the bar-shaped protrusion 17 of the hinge cover 16 is inserted into the fitting hole 15, a large diameter of the bar-shaped protrusion 17 is formed. A flange portion 17b is supported by the plurality of protrusions 14b, and holds a fitting shaft portion 17a of the rod-shaped projection 17.
Reference numeral 19 denotes an injection nozzle for injecting the cleaning liquid onto the outer surface of the front glass.
[0014]
According to the embodiment of the present invention configured as described above, in order to couple the hinge cover 16 as a coupling component to the end face portions 14 on both sides of the cowl top 10 as the coupled member, as shown in FIG. In addition, the tip knob 17d of the bar-shaped projection 17 extending on the back surface of the hinge cover 16 is inserted into the fitting hole 15 vertically penetrating the end face portion 14, and the tip knob portion extending to the back surface side of the fitting hole 15 is provided. By pulling down 17d manually or by using an instrument, the large-diameter flange portion 17b of the rod-like projection 17 having a diameter larger than the hole diameter of the fitting hole 15 is reduced and deformed, passes through the fitting hole 15, and passes through the fitting hole 15. The shape of the large-diameter flange portion 17b is supported by the top surfaces of the plurality of protruding portions 14b, and the connection between the two is completed.
[0015]
According to the embodiment, even if the diameter of the fitting hole 15 is larger than that of the related art, a part of the bottom peripheral edge portion 14a of the fitting hole 15 is protruded toward the opening side of the fitting hole 15 and has a bottom surface. Since the plurality of ridges 14b protruding from the peripheral edge 14a are provided apart from each other, the coupling portion can be securely connected without rattling, and the rod-shaped projection 17 of the hinge cover 16 is inserted into the fitting hole 15. In this case, it is possible to solve the problem of the rod-shaped projection 17 being broken due to forced fitting.
Further, the rod-shaped projection 17 of the hinge cover 16 has a fitting shaft portion 17a in which a notch portion 17e is provided in a shaft portion having the same diameter and extending downward from the rear end of the rear surface. When inserted into the fitting hole 15, the large-diameter flange portion 17 b is easily reduced and deformed, so that the rod-shaped projection 17 can easily pass through the fitting hole 15, and a locking effect at the time of molding can be expected.
Further, there is an effect that the connection between the member to be coupled and the coupling member is facilitated and the working efficiency is improved.
[0016]
In the above-described embodiment, the hinge structure of the bonnet, which is provided on both sides of the cowl top, which is the member to be coupled, located outside the front glass of the vehicle, is formed by connecting the rigid coupling member and the elastic coupling component to each other. Although the description has been given of the case where the present invention is applied to the connection with the connection component serving as the covering hinge cover, the present invention is not limited to this, and the connection member formed of a hard resin member, such as the attachment of a cushion member of a glow box, may be used. Of course, it can be used for a coupling structure with a coupling member having elasticity.
【The invention's effect】
As described above, the coupling structure of the rigid member to be coupled and the elastic coupling component of the present invention allows the size of the fitting hole formed in the resin member to be reduced by the rod-shaped projection formed on the back surface of the coupling member. The fitting hole is formed in a size that allows it, and a plurality of protruding portions that protrude partly on the opening side of the fitting hole and protrude from the bottom surface peripheral portion are separated from each other at the bottom peripheral edge of the fitting hole. When the bar-shaped projection of the coupling component is inserted into the fitting hole, a large-diameter flange portion of the bar-shaped projection is supported by the plurality of protrusions, and a fitting shaft portion of the bar-shaped projection is provided. Is held, the following effects can be obtained. That is, the connecting portion can be securely connected without rattling, and when the bar-shaped protrusion of the connecting component is inserted into the fitting hole, problems such as the bar-shaped protrusion being torn due to forced fitting can be solved. In addition, the coupling between the member to be coupled and the coupling member is facilitated, the working efficiency is improved, and even if the axis of the rod-shaped projection of the coupling component and the axis of the fitting hole do not coincide with each other and there is some deviation, the ridge portion is By adjusting the forming position, the assembled state of the member to be coupled and the coupling member can be corrected to a complete state, and there is an effect that quality can be improved.
[Brief description of the drawings]
FIG. 1 shows an embodiment of a coupling structure of a rigid coupling member and an elastic coupling component according to the present invention, and a cowl top which is a coupling member located outside a windshield of an automobile. FIG. 4 is a schematic plan view of a main part showing a state where the present invention is applied to a connection with a connection member serving as a hinge cover for covering a hinge portion of a bonnet provided on both sides thereof.
FIG. 2 is an exploded enlarged perspective view of a main part.
FIG. 3 is an enlarged sectional view of a state in which a hinge cover is coupled to the cowl top.
FIG. 4 is a sectional view taken along line BB of FIG. 3;
FIG. 5 is a view corresponding to FIG. 1 of a coupling structure of a coupling part including a hinge cover that covers a hinge portion of a bonnet that is disposed on both sides of a conventional cowl top.
FIG. 6 is an enlarged cross-sectional view of a main part showing a connection state between a member to be coupled and a coupling member in a conventional coupling structure.
FIG. 7 is a sectional view taken along line AA of FIG. 6;
[Explanation of symbols]
10 cowl top (member to be joined)
11 Bonnet 12 Hinge 13 Void 14 End face 14a Bottom edge 14b Ridge 15 Fitting hole 16 Hinge cover (joint part)
17 Bar-shaped projection 17a Fitting shaft 17b Large-diameter flange 17d Tip knob

Claims (4)

A coupling component having rubber-like elasticity is fitted into a fitting hole formed in a member to be coupled made of a hard resin member, and a rod-like projection protrudingly formed on a coupling surface of the coupling component is forcibly fitted into the fitting hole. In the coupling structure between the rigid coupling member and the elastic coupling component, the large-diameter flange portion of the rod-shaped projection is engaged with the bottom peripheral edge of the fitting hole and coupled.
The fitting hole formed in the rigid member to be joined is formed in such a size that the bar-shaped projection allows a gentle insertion, and a part of an opening of the fitting hole is formed at a peripheral edge of a bottom surface of the fitting hole. A plurality of ridges projecting from the side are provided separately from each other, and when the rod-shaped projection of the coupling component is inserted into the fitting hole, the large-diameter flange portion of the rod-shaped projection has the plurality of ridges. A rigid connecting member and an elastic coupling part, wherein the rigid coupling member and the elastic coupling part are supported by the portion and hold the fitting shaft of the rod-shaped projection. The rigid joined member and the elastic joint component according to claim 1, wherein the joined member is formed of a PP resin material, and the joint component is formed of an elastic material such as a thermoplastic elastomer or rubber. Connection structure. The rigid coupling member according to claim 1, wherein a notch having a substantially convex cross section is formed in a fitting shaft portion extending from a base end portion of the rod-shaped projection to a large-diameter flange portion. Connection structure with elastic connection parts. 2. The rigid member to be coupled and the elastic coupling component according to claim 1, wherein the protrusions provided on the peripheral edge of the bottom surface of the fitting hole are formed at three locations at 120 ° intervals in the circumferential direction. 3. Connection structure.

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