JP2541313Y2 - Hole plug - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a hole plug for closing a mounting hole formed in a plate.

[0002]

2. Description of the Related Art In general, a hole plug used for closing a mounting hole formed in a plate-shaped object such as a body panel of an automobile is larger than the mounting hole as shown in U.S. Pat. No. 4,363,420. An engaging piece that extends from the flange and is inserted into the mounting hole to engage with the plate-like material, and is heat-deformable provided on a surface of the flange that faces the surface of the plate-like material. By heating and melting the heat-deformable member of the hole plug, the molten material is allowed to wrap around the hole edge of the mounting hole and the back side of the plate-like material, thereby forming the hole plug. Installation was done.

However, in the above-mentioned prior art, there is a problem in that the heat-deformable member does not surely flow in a molten state from the front surface side of the plate-shaped object through the hole edge of the mounting hole to the back surface side of the plate-shaped object. Was.

In view of the above, according to the invention of Japanese Patent Application Laid-Open No. 2-293278, an engaging piece which is inserted into the mounting hole and engages with a plate-like object is provided on a flange portion larger than the mounting hole. A member that is heated and deformed at the hole edge of the mounting hole is provided on the surface facing the surface of the plate-like material, and this heat-deformable member is heated,
Attempts have been made to provide hole plugs that can be reliably fixed to the mounting holes of a plate by melting.

[0005]

In such a conventional hole plug, the heat-deformable member must go around to the back side of the plate-like object, and the heat-deformable member flows a large amount. The required time was greatly required. Particularly, in a hole plug for closing a hole of a body panel used for outflow of a coating liquid during a coating process of an automobile after the coating process, a member that can be heated and deformed over the entire circumference of the opening portion to ensure sealing performance. It was necessary to make sure that

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in conventional hole plugs, and has as its object to provide a highly sealed hole plug that securely adheres to a plate-like object and closes an opening thereof.

[0007]

SUMMARY OF THE INVENTION A hole plug according to the present invention achieves the above-mentioned object by providing a dish-shaped portion 2 having a rising wall 1 on the peripheral side and an upper portion of the rising wall 1 of the dish-shaped portion 2. A hole plug main body A having a flange portion 3 projecting outward from the hole plug; a first short cylindrical portion 4 having a diameter that can accommodate the dish-shaped portion 2 of the hole plug main body A; A second short cylindrical portion 5 in which the flange portion 3 having a slightly larger diameter than the diameter of the small cylindrical portion 4 is accommodated; and a plastic mounting frame B provided in a stepwise manner. A horizontal step surface 6a inside between the first short tube portion 4 and the second short tube portion 5
The hole plug body A is brought into contact with the flange portion 3 and the dish-shaped portion 2 is fitted into the first short-diameter tube portion 4 and assembled. A convex ridge 7 for holding the hole edge of the hole plug mounting hole H in a temporarily fixed state between the outer horizontal section 6b between the portion 4 and the second short cylindrical portion 5 is provided in the first short section. It is provided annularly on the outer periphery of the cylindrical portion, and the ridge 7 is configured to be deformable by heating.

[0008]

The hole plug body A is held in a state where the flange 3 of the hole plug body A is clamped by the inner horizontal step surface 6a of the mounting frame B and the claw 8 provided inside the second short cylindrical portion 5. After fitting into the mounting frame B and mounting, the mounting holes H
The first short cylindrical portion 4 of the mounting frame B is inserted into the mounting frame B, and the heat-deformable ridges 7 provided annularly on the outer periphery of the first short cylindrical portion 4 are engaged with the edge of the mounting hole H. Since the ridges 7 are heated and deformed in the temporarily fixed state, the hole plugs can be easily and reliably attached to the plate-like material P in a sealed state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a typical hole plug according to the present invention will be described below in detail with reference to the drawings. The hole plug closes a mounting hole H formed in the plate-shaped material P, and is composed of a hole plug main body A and a mounting frame B into which the hole plug main body A is fitted.

The hole plug main body A is made of metal and has a substantially rectangular bottom portion 2a smaller than the mounting hole H, and a dish-shaped portion 2 having a rising wall 1 extending upward from the entire peripheral side of the bottom portion 2a. And a flange 3 protruding outward from an upper portion of the wall 1.

The mounting frame B is made of plastic, has a size substantially the same as the mounting hole H, has a first short cylindrical portion 4 having an opening 9 on the inside, and an inner side extending from the first short cylindrical portion 4. A second short cylindrical portion 5 having a slightly larger diameter and provided in a stepped manner through the horizontal step surface 6a and the outer horizontal section 6b is provided continuously.

On the outer periphery of the first short tube portion 4, there is provided an annular ridge 7 orbiting around the periphery of the short tube portion 4.
Claws 8 are provided at four locations in the annular direction of the inner circumference of the second short cylindrical portion 5.

When using the hole plug having the above-described configuration, first, the dish-shaped portion 2 of the hole plug main body A is attached to the opening 9 of the mounting frame B by the flange portion 3 of the hole plug main body A. Until it comes into contact with the inner horizontal step surface 6a (see FIG. 3). At this time, the opening 9 has substantially the same size as the dish-shaped portion 2, and the edge of the flange portion 3 has the claw 8 provided on the inner periphery of the second short cylindrical portion 5 of the mounting frame B. The claw 8 is induced to return elastically while passing through the inner horizontal section 6a while being bent outward by the elasticity of the material, and is clamped between the inner horizontal section 6a of the hole plug body A and the claw 8. Then, the hole plug body A and the mounting frame B are assembled in a fitted state.

Next, the first short cylindrical portion 4 is fitted into the mounting hole H formed in the plate-like material P until the outer horizontal section 6b comes into contact. At this time, the outer circumference of the first short cylindrical portion 4 has a size substantially equal to the mounting hole H of the plate-like material P.
Is provided with an annular ridge 7 on the outer periphery of the short cylindrical portion 4, the ridge 7 is elastically deformed by the elasticity of the material by the hole edge of the mounting hole H, and has passed through the hole edge of the mounting hole. In this state, the elastic member returns to its original state, and the outer horizontal section 6b and the ridge 7 hold the hole edge of the mounting hole H so that the hole plug is temporarily fixed to the plate-like material P (FIGS. 4 and 5). reference).

Thereafter, the ridges 7 provided on the outer periphery of the first short cylindrical portion 4 in a circular shape, that is, in an annular shape, are heated. Since the ridges 7 are heat-deformable, they are melted and deformed, flow into the gap between the ridges 7 and the plate P, and flow into the hole plug and the plate P.
And eliminate any gaps between them and ensure a secure state.

Further, since the ridges 7 are provided in a circular shape, that is, in a ring shape, they are in close contact with the entire periphery of the hole edge of the mounting hole H, and the hole edge is completely sealed. (See FIG. 6).

In the above embodiment, the hole plug body A is made of metal and the mounting frame B is made of a plastic material. However, if the hole plug body A has a higher melting temperature than the mounting frame B. For example, both the hole plug body A and the mounting frame B may be made of a plastic material.

[Effect of the invention]

The hole plug according to the present invention has a mounting frame B
Since the ridges 7 are fused to the hole edges of the mounting holes H in a state in which the ridges 7 are temporarily fastened to the mounting holes H with the ridges 7 provided in an annular shape, There is an advantage that the fusion bonding of the ridges 7 can be easily and reliably performed.

Further, since the ridges 7 of the mounting frame B are securely fused over the entire periphery of the hole edge of the mounting hole H, the mounting hole H can be completely watertightly closed.

Further, since the mounting frame B of the hole plug is mounted by deforming and press-fitting the ridge 7 locked to the hole edge of the mounting hole H in a molten state, the mounting of the hole plug is ensured. It is possible.

[0021] From the above point, in the coating treatment of the automobile,
It can be used as a means for closing a hole in the body panel surface used for outflow of excess coating liquid.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a part of a hole plug.

FIG. 2 is a cross-sectional view from the front side before assembly.

FIG. 3 is a sectional view of the assembled state as viewed from the front side.

FIG. 4 is a cross-sectional view of the temporary fixing state viewed from the front side.

FIG. 5 is a sectional view of a main part in a temporarily fixed state.

FIG. 6 is a sectional view of a main part in a use state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rise wall 2 Dish-shaped part 3 Flange part 4 1st short cylindrical part 5 2nd short cylindrical part 6 Horizontal step surface 7 Convex stripe 8 Claw 9 Opening A Hole plug main body B Mounting frame P Plate-shaped object H Mounting hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A hole plug body having a dish-shaped portion having a rising wall on a peripheral side and a flange portion projecting outward from an upper portion of the rising wall of the dish-shaped portion; and the plate of the hole plug body. No. 1 of the caliber where the shape part fits
A plastic mounting frame in which a short cylindrical portion of the above and a second short cylindrical portion in which the flange portion having a diameter slightly larger than the diameter of the first short cylindrical portion is accommodated are formed in a stepped manner. The hole plug body contacts the flange portion with a horizontal cross section inside the first short tube portion and the second short tube portion of the mounting frame, and the inside of the first short tube portion And a hole plug between a horizontal stepped surface between the first short tube portion and the second short tube portion of the mounting frame. A convex ridge for holding the hole edge of the mounting hole in a temporarily fixed state is provided in an annular shape on the outer periphery of the first short cylindrical portion, and the convex ridge is heat deformable. Hole plug.