WO2014115877A1

WO2014115877A1 - Hole plug

Info

Publication number: WO2014115877A1
Application number: PCT/JP2014/051697
Authority: WO
Inventors: 和也半田
Original assignee: 株式会社ニフコ
Priority date: 2013-01-28
Filing date: 2014-01-27
Publication date: 2014-07-31
Also published as: JP2014145382A; KR20140097009A; KR101528095B1; CN104937316A; CN104937316B; JP6067390B2

Abstract

Provided is a hole plug for closing a through-hole provided in a body member. The hole plug comprises a flange part, a penetration part which is provided to hang from the flange part and penetrates the through-hole, and a meltable member which is mounted to the penetration part and interposed between the flange part and the body member. The hole plug has, on the outer peripheral surface of the penetration part, an engagement part for engaging with the body member, and a rib which hangs from the flange part to form a gap between the body member and the flange part.

Description

Hole plug

This invention relates to a hole plug for closing a through hole provided in a body member, and has a rib that hangs down from a flange portion and forms a gap between the body member and the outer peripheral surface of a plunging portion. The meltable member melts and flows into the gap so that the sealing performance of the hole plug can be improved.

2. Description of the Related Art Conventionally, a hole plug that performs sealing by interposing a fusible member between a plate-like member that is a body panel of an automobile and a flange portion of the hole plug is known (page 2, column 4 of Patent Document 1). Right) See lines 8 to 26 and Figures 4 to 6).

Reality 07-14692

However, the above-described conventional hole plug has a problem in that there is no gap through which the meltable member melts because the meltable member and the entry portion of the hole plug are in close contact with each other.
Therefore, the present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is to improve the sealing performance of the hole plug by melting and flowing the meltable member into the gap. Is to be able to do that.

The present invention has been made to achieve the above object, and the present invention is characterized by the following points.

The first is a hole plug for closing a through hole provided in the body member.
Second, the hole plug has the following configuration.
(1) Flange part (2) Entry part An entry part hangs down from a flange part, and rushes into a through-hole.

(3) Meltable member The meltable member is attached to the intrusion portion and is interposed between the flange portion and the body member.
Thirdly, the outer peripheral surface of the entry portion has the following configuration.
(4) Hanging part The hanging part is for engaging with the body member.

(5) Rib The rib is suspended from the flange portion and forms a gap between the body member.
The present invention is preferably configured as follows.

A thin wall portion was provided on the peripheral surface corresponding to the hanging portion on the bottom surface of the entry portion. According to this aspect, by providing the thin portion on the peripheral surface corresponding to the hook portion, the hook portion can be easily bent, and the workability of attaching the hole plug can be improved.

The present invention is preferably configured as follows.

A pressing convex portion that protrudes from the bottom surface toward the flange portion is provided at the center of the bottom surface. According to this aspect, the workability of attaching the hole plug can be improved by providing the pressing protrusion at the center of the bottom surface.
The present invention is preferably configured as follows.

リブ Ribs and hooks were placed alternately on the outer peripheral surface of the entry. According to this aspect, by arranging the ribs and the hanging portions alternately on the outer peripheral surface of the entry portion, the role sharing between the ribs and the hanging portions can be clarified, and the flexibility of the hanging portions can be ensured.

Since this invention is comprised as mentioned above, it has a rib which hangs down from the flange part and forms a space | gap between body parts in the outer peripheral surface of a plunging part, and can be melt | dissolved in the said space | gap Can be melted and flown, and the sealing performance of the hole plug can be improved.

It is the side view of the plug main body which comprises the hole plug in the 1st Embodiment of this invention, a meltable member, and the side view of a body member. It is the perspective view of the plug main body which comprises a hole plug, and a meltable member, and the perspective view of a body member. It is a side view of a hole plug and a body member. It is a perspective view of a plug main body. It is a side view of a plug main body. It is a top view of a plug main body. It is a bottom view of a plug main body. FIG. 7 is a cross-sectional view taken along line AA in FIG. 6. It is sectional drawing which follows the BB line of FIG. It is the C section enlarged view of FIG. It is the D section enlarged view of FIG. It is a perspective view of a meltable member. It is a side view of a meltable member. It is a top view of a meltable member. It is sectional drawing which follows the EE line | wire of FIG. It is the F section enlarged view of FIG. It is the perspective view which looked at the hole plug from the upper part. It is the perspective view which looked at the hole plug from the lower part. It is a side view of a hole plug. It is a top view of a hole plug. It is a bottom view of a hole plug. It is a side view of a body member. It is sectional drawing of the attachment state of a hole plug. It is a partial enlarged view of the rib of a body member and a meltable member. It is a top view of the attachment state of a hole plug. FIG. 26 is a cross-sectional view taken along line FF in FIG. 25. The 2nd Embodiment of this invention is shown, The figure is a partially expanded view of the rib of a body member, and a meltable member.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
First, a first embodiment of the present invention will be described.

(Structure of hole plug 10)
In the figure, reference numeral 10 denotes a hole plug. As shown in FIGS. 1 to 3 and FIG. 23, 10 is inserted into the through hole 21 provided in the body member 20 to close the through hole 21. is there.
As shown in FIGS. 1 to 3 and 22, the through hole 21 is formed in a circular shape penetrating the front and back surfaces of the body member 20.

Although the through-hole 21 is formed in a circular shape in the illustrated embodiment, the present invention is not limited to this, but may be formed in an elliptical shape or an oval shape, for example, although not illustrated.
As shown in FIGS. 1 and 2, the hole plug 10 is roughly divided into the following parts.
The following (1) and (2) will be described later.
(1) Plug body 30
(2) Meltable member 40
The parts of the hole plug 10 are not limited to the above (1) and (2).
(Plug body 30)
As shown in FIGS. 1 to 11 and FIG. 23, the plug body 30 is mounted in the through hole 21 of the body member 20 and closes the through hole 21 in cooperation with the meltable member 40 described later. .

The plug body 30 is integrally formed of, for example, a thermoplastic elastomer (TPE) having appropriate elasticity and rigidity. In addition, although the plug main body 30 was shape | molded by TPE in embodiment of illustration, it is not limited to this.
As shown in FIGS. 4 to 11, the plug body 30 is roughly divided into the following parts.
The following (1) and (2) will be described later.

(1) Flange 50
(2) Entry 60
In addition, each part of the plug main body 30 is not limited to the above (1) and (2).
(Meltable member 40)
As shown in FIGS. 1 to 3, FIGS. 12 to 21, and FIG. 23, the meltable member 40 is attached to the intrusion portion 60 and is interposed between the flange portion 50 and the body member 20.

The meltable member 40 is integrally formed of a heat softening resin having heat softening properties, for example, ethylene-vinyl acetate copolymer resin (EVA). In addition, although the meltable member 40 was shape | molded by EVA, it is not limited to this.
As shown in FIGS. 12 to 16, the meltable member 40 has a thin plate shape and is formed in a ring shape or a donut shape when viewed from above, and a circular center hole 41 penetrating in the thickness direction is provided at the center. .

As shown in FIG. 18, the inner diameter of the center hole 41 is set to be slightly smaller than the outer diameter of a later-described entry portion 60 of the plug body 30. Further, the outer diameter of the meltable member 40 is set to be slightly larger than the outer diameter of a flange portion 50 described later of the plug body 30 as shown in FIGS.
Further, as shown in FIGS. 12, 13, 17, and 20, the meltable member 40 is provided with a tab 42 protruding from the outer periphery. A pair of tabs 42 are formed in the diametrical direction of the meltable member 40, and project beyond the outer periphery of the flange portion 50.
(Flange part 50)
As shown in FIGS. 4 to 11 and FIG. 23, the flange portion 50 is formed in a substantially sucker shape and elastically contacts the surface of the body member 20 via the meltable member 40.

As shown in FIGS. 4 to 9, the flange portion 50 extends obliquely downward from the upper end portion of a cylindrical outer peripheral wall 61 (described later) of the rush portion 60 toward the surface of the body member 20.

(Entry 60)
As shown in FIGS. 4 to 11 and FIG. 23, the projecting portion 60 is suspended from the flange portion 50 and enters the through hole 21 of the body member 20.

As shown in FIGS. 4 to 11, the entry portion 60 includes the following portions.
The following (1) to (6) will be described later.
(1) Outer wall 61
(2) Bottom wall 62
(3) Pressing convex part 63
(4) Hanging part 64
(5) Rib 65
(6) Thin part 66
In addition, each part of the rush part 60 is not limited to the above (1) to (6).

(Outer wall 61)
As shown in FIGS. 5 and 7 to 9, the outer peripheral wall 61 is formed in a cylindrical shape, and its upper end portion is connected to the flange portion 50.

The outer diameter of the outer peripheral wall 61 is formed substantially equal to the inner diameter of the through hole 21 of the body member 20, as shown in FIG.
Further, as shown in FIGS. 5 and 8, the outer peripheral wall 61 is formed in a tapered shape that is recessed downward.
(Bottom wall 62)
As shown in FIGS. 4 and 6 to 9, the bottom wall 62 is formed in a ring shape or a donut shape as viewed from above, and its outer peripheral edge is connected to the lower end portion of the cylindrical outer peripheral wall 61.
(Pressing convex part 63)
As shown in FIGS. 4 and 9, the pressing convex portion 63 is located at the center portion of the bottom surface and is provided so as to protrude from the bottom surface toward the flange portion 50, and the protruding portion 60 is formed through the through hole 21 of the body member 20. Used when pushing into.

The pressing protrusion 63 is formed in a cylindrical shape whose upper surface is closed, and its lower end is connected to the inner peripheral edge of the ring-shaped or donut-shaped bottom wall 62.
(Hanging part 64)
As shown in FIGS. 5, 7, 9, 11, and 23, the hanging portion 64 is located on the outer peripheral surface of the rush portion 60 and is for engaging with the body member 20.

As shown in FIG. 9, the hooks 64 project in a claw shape from the outer peripheral surface of the outer peripheral wall 61, and as shown in FIG. 7, a plurality of, for example, five, are provided at equal intervals.
As shown in FIGS. 9 and 23, the hanging portion 64 has an upper end facing away from the lower surface of the flange portion 50 and facing the lower portion, and a section with the inclined surface facing downward is formed in a substantially triangular shape. Further, as shown in FIG. 5, the hanging portion 64 is formed in a substantially triangular shape that is sunk downward as viewed from the side.

In the embodiment shown in the figure, five hook portions 64 are provided, but at least a pair of hook portions 64 may be provided, and two to four or six or more may be provided.
(Rib 65)
As shown in FIG. 5, the rib 65 is located on the outer peripheral surface of the entry portion 60 and is suspended from the flange portion 50, and between the body member 20, that is, the outer periphery surface of the entry portion 60, as shown in FIG. 26. A gap 70 is formed between the inner edge of the through hole 21.

As shown in FIGS. 5 and 7, the ribs 65 are alternately arranged on the outer peripheral surface of the protrusion 60 with the hooks 64, and five ribs 65 of the same number as the hooks 64 are formed.
As shown in FIG. 8, the upper end portion of the rib 65 is connected to the lower surface of the flange portion 50 and extends downward to the middle of the height of the protruding portion 60. As shown in FIG. It extends linearly. Further, as shown in FIG. 8, the height of the rib 65 in the protruding direction is substantially constant, and the lower end portion is formed to be gradually lower.
(Thin part 66)
As shown in FIGS. 4, 6, and 9, the thin-walled portion 66 is located on the bottom surface of the protrusion 60 and is provided on the peripheral surface of the hook portion 64, that is, on the peripheral surface corresponding to the hook portion 64. This makes it easy to bend.

As shown in FIG. 9, the thin wall portion 66 is located on the outer peripheral edge portion of the bottom wall 62 connected to the lower end portion of the outer peripheral wall 61, and is formed thin by denting the upper surface of the bottom wall 62. . As shown in FIGS. 4 and 6, the thin portion 66 is formed in a sector shape or a triangle shape that spreads toward the outer peripheral wall 61 when viewed from the plane. In relation to the hanging portion 64, the thin-walled portion 66 is located on the inner peripheral side with the outer peripheral wall 61 in between, and is provided in the same number as the hanging portion 64.

In the illustrated embodiment, five thin portions 66 are provided in the same number as the hanging portions 64, but the present invention is not limited to this, and the number of the thin portions 66 is less than the number of the hanging portions 64, such as being provided every other hanging portion 64. It is good also as a number. The rib 65 is not provided with the thin portion 66 because the amount of deflection is relatively small. However, although not shown, a “thin portion” may be provided in order to make the position of the rib 65 easy to bend.
(How to install hole plug 10)
Next, a mounting method for closing the through hole 21 of the body member 20 as shown in FIGS. 17 to 21 using the hole plug 10 having the above configuration will be described.

First, the meltable member 40 is attached to the entry portion 60 of the plug body 30.
In other words, the center hole 41 of the meltable member 40 is fitted in accordance with the protrusion 60 of the plug body 30.
When the meltable member 40 is fitted, the inner diameter of the central hole 41 is formed to be slightly smaller than the outer diameter of the protruding part 60, so that the protruding part 60 fits while expanding the opening edge of the central hole 41. .
At this time, the meltable member 40 gets over the hook 64 and can be prevented from falling off by the hook 64.

Further, the meltable member 40 is inserted deeply to the lower side of the flange portion 50 of the plug main body 30, that is, to a position where it abuts on the flange portion 50.
When the force for inserting the entry portion 60 is released, the opening restoring portion of the center hole 41 is brought into close contact with the outer peripheral surface of the entry portion 60 due to the compressive restoring force of the meltable member 40 and cannot be detached from the entry portion 60.

Next, the entry portion 60 of the plug body 30 is inserted in accordance with the through hole 21 of the body member 20.
When the protrusion 60 is inserted, the hook 64 that protrudes from the outer peripheral surface engages with the opening edge of the through hole 21.
Next, when the pressing convex portion 63 of the plug body 30 is pushed in by hand, the hanging portion 64 is pushed by the opening edge portion of the through hole 21, and the portion of the thin portion 66 is bent, so that the intrusion portion 60 is reduced in diameter, The hanging portion 64 can pass through the through hole 21.
At the same time, the rib 65 is pushed against the opening edge of the through hole 21 and bent as shown in FIG. 26, so that it is between the body member 20, that is, the outer peripheral surface of the entry portion 60 and the through hole 21. A gap 70 is generated between the inner edge and the inner edge.

When the hook portion 64 passes through the through hole 21, as shown in FIG. 23, the hook portion 64 protrudes due to the elastic restoring force of the plug body 30, and is hooked on the back surface of the body member 20, that is, the lower surface in FIG. Cannot be removed from the through hole 21.
At this time, the flange portion 50 elastically contacts the surface of the body member 20, that is, the upper surface in FIG.

Therefore, the body member 20 is elastically sandwiched between the flange portion 50 and the hook portion 64 from the front and back surfaces.
Next, the vicinity of the through hole 21 of the body member 20 is heated as a whole.
When the body member 20 is heated, the meltable member 40 is melted, and a molten resin is formed between the lower surface of the flange portion 50 and the surface of the body member 20, and between the outer periphery of the protrusion 60 and the opening edge of the through hole 21. Flows and then solidifies, thereby sealing between the plug body 30 and the through hole 21 of the body member 20, and fixing the plug body 30 to the body member 20.

In addition, the molten resin flows into the gap 70 (see FIG. 26) generated between the outer peripheral surface of the entry part 60 and the inner edge part of the through hole 21, and closes the gap 70.
Although not shown, the molten resin flows into the “gap” between the outer peripheral surface of the intrusion part 60 and the inner edge of the through-hole 21 of the meltable member 40, and the “gap” ”.
The molten resin that has flowed into the gap 70 is then solidified, thereby closely contacting the lower surface of the flange portion 50, the outer peripheral surface of the protruding portion 60, and the surface of the body member 20, and the outer peripheral surface of the protruding portion 60 and the inner edge of the through hole 21 The plug body 30 is fixed to the body member 20 as well as sealing between the two parts.
Furthermore, when the meltable member 40 is melted and softened, the flange portion 50 is elastically restored to the initial shape, so that the molten resin flows out from between the flange portion 50 and the opening edge of the through hole 21 to the outside. It is suitably held without.

At this time, the molten resin is pressed by the restoring force of the flange portion 50, and the space between the flange portion 50 and the opening edge portion of the through hole 21 is suitably filled, so that the gap between the two can be reliably sealed.
Actually, when the body member 20 is a body panel of an automobile, the single heating step of the meltable member 40 can be omitted by simultaneously heating in the heating process at the time of dipping coating drying.

Next, a second embodiment of the present invention will be described with reference to FIG.
The feature of this embodiment is that the rib 65 is not bent as shown in FIG. 27 as in the first embodiment of FIG. A gap 70 can be formed between the opening edge of the center hole 41 and the center hole 41.
That is, when the inner diameter of the through hole 21 of the body member 20 is large or the rigidity of the rib 65 is high, the rib 65 maintains the protruding state as shown in FIG. At this time, the opening edge portion of the center hole 41 of the meltable member 40 rides on the rib 65, so that a gap 70 is generated between them. The molten resin melted by the meltable member 40 flows into the generated gap 70 during heating, and the sealing effect can be achieved by closing the gap 70.
The entire contents of the description, claims, drawings and abstract of Japanese Patent Application No. 2013-012861 filed on Jan. 28, 2013 are incorporated herein as the disclosure of the description of the present invention. Is.

Claims

A hole plug for closing a through hole provided in the body member,
The hole plug is
A flange,
A plunging portion that hangs down from the flange portion and plunges into the through hole;
It is attached to the entry part, and consists of a meltable member interposed between the flange part and the body member,
On the outer peripheral surface of the entry portion,
A hook for engaging with the body member;
A hole plug comprising: a rib that hangs down from the flange portion and forms a gap with the body member.
On the bottom of the entry part,
The hole plug according to claim 1, wherein a thin portion is provided on a peripheral surface corresponding to the hook portion.
In the center of the bottom,
The hole plug according to claim 1, wherein a pressing convex portion that protrudes from the bottom surface toward the flange portion is provided.
The rib and the hanging portion,
The hole plug according to any one of claims 1 to 3, wherein the hole plugs are alternately arranged on an outer peripheral surface of the entry portion.