JP2020200912A - Fastener - Google Patents

Abstract

To provide a fastener which enables reduction of insertion resistance to an attachment hole.SOLUTION: A fastener 100 is attached to an attachment hole 111 of an attached member 110 and includes: a cylindrical inner wall part 101; an outer wall part 102 arranged coaxially with the inner wall part and spaced apart to the outer side therefrom; a connection part 103 which connects a base end part of the inner wall part with a base end part of the outer wall part and is disposed at the front side of the attachment hole; an elastic engagement piece 104 which extends from a tip side outer periphery, located at the rear side of the attachment hole, of the outer wall part and engages with a rear surface of the attached member; a flange part 105 which extends from a base end part outer periphery of the outer wall part and engages with a surface of the attached member; and a closing part 106 which closes the inner side of the inner wall part.SELECTED DRAWING: Figure 3

Description

The present invention relates to a fastener suitable for, for example, a hole plug used for closing a hole provided in a member to be attached.

For example, holes may be formed in the body panels and lids of automobiles for various purposes. If such holes are left as they are, problems may occur in terms of sealing performance, appearance, etc. Therefore, in general, the holes are closed with fasteners such as hole plugs.

As a fastener suitable for such a hole plug or the like, the following Patent Document 1 describes a second sealing lip that engages with the front peripheral edge of a mounting hole from the outer peripheral edge of the upper end of a tubular body whose lower end is closed and whose upper end is open. (28) is extended, and a spring element (34) that abuts on the inner circumference of the mounting hole is extended from the outer circumference of the lower end of the tubular body, and extends from the lower end side outer circumference of the spring element (34) to the back peripheral edge of the mounting hole. A sealing plug with an extended first sealing lip (26) to engage is disclosed (see Fig. 7).

International release WO 2010/121749

In the sealing plug of Patent Document 1, the distance between the connecting portion of the spring element (34) to the lower end of the tubular body and the connecting portion of the first sealing lip (26) to the spring element (34) is short. There is a problem that the spring element (34) is less likely to bend inward when it is inserted into the mounting hole, and the insertion resistance is increased.

Therefore, an object of the present invention is to provide a fastener capable of reducing insertion resistance into a mounting hole.

In order to achieve the above object, the fastener of the present invention is a fastener attached to a mounting hole of a member to be attached, and has a tubular inner wall portion and a concentric shape separated outward from the inner wall portion. The outer wall portion arranged in, the base end portion of the inner wall portion, and the base end portion of the outer wall portion are connected, and the connecting portion arranged on the front side of the mounting hole and the mounting hole of the outer wall portion. An elastic engaging piece that extends from the outer periphery of the tip side located on the back side and engages with the back surface of the attached member, and a flange that extends from the outer periphery of the base end portion of the outer wall portion and engages with the surface of the attached member. It is characterized by including a portion and a closing portion that closes the inside of the inner wall portion.

According to the present invention, the connecting portion is arranged on the front side of the mounting hole, and the extension position of the elastic engaging piece from the outer wall portion is arranged on the back side of the mounting hole, so that the distance between the connecting portion and the extending position Can be taken for a long time. Therefore, when the outer wall portion and the inner wall portion are inserted into the mounting holes of the member to be attached in order to attach the fastener, the outer wall portion tends to bend inward, and the insertion resistance can be reduced.

It is a perspective view seen from diagonally above which shows one Embodiment of the fastener which concerns on this invention. It is a perspective view seen from the diagonally lower side of the fastener. It is a perspective view seen from diagonally above by cutting the fastener. It is a partially enlarged sectional view of the fastener. It is explanatory drawing which shows the deformation process of the elastic engagement piece when the fastener is inserted into a mounting hole. It is explanatory drawing which shows the deformation process of the elastic engaging piece when a pulling force acts on the fastener.

Hereinafter, embodiments of the fastener according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the fastener 100 of this embodiment is attached to a mounting hole 111 provided in the member to be mounted 110, and is used to close the mounting hole 111 to prevent water or the like from entering. Be done. The fastener 100 of this embodiment is integrally molded using an elastic material such as rubber or an elastomer so as to obtain good sealing properties, but in the present invention, the material of the fastener 100 is particularly Not limited.

Referring to FIGS. 2, 3 and 4, the fastener 100 includes an inner wall portion 101 having a tubular shape and an outer wall portion 102 arranged concentrically with respect to the inner wall portion 101 so as to be radially outwardly separated. The connecting portion 103, which is arranged on the front side of the mounting hole 111 in a state where the base end portion of the inner wall portion 101 and the base end portion of the outer wall portion 102 are connected and attached to the mounting hole 111, and the mounting hole 111 of the outer wall portion 102. An elastic engagement piece 104 that extends from the outer periphery of the tip side located on the back side of the outer wall portion 110 and engages with the peripheral edge of the attachment hole 111 on the back surface of the attached member 110, and extends from the outer periphery of the base end portion of the outer wall portion 102 to be attached. A flange portion 105 that engages with the peripheral edge of a mounting hole 111 on the surface of the member 110 and a closing portion 106 that closes the inside of the inner wall portion 101 are provided.

A concave space 107 is formed inside the inner wall portion 101. In this embodiment, the front surface (upper surface in the drawing) of the closing portion 106 and the connecting portion 103 forms a continuous circular flat surface. Then, the flange portion 105 extends obliquely downward in the outer diameter direction from the outer peripheral edge in a skirt shape. The tip portion 105a of the flange portion 105 is formed so as to be gradually thicker than the base end side, and the bottom surface 105b in contact with the mounting surface of the member to be mounted 110 is flat (see FIG. 4).

The outer wall portion 102 is arranged concentrically on the outside of the inner wall portion 101 via the annular space 108. On the outer periphery of the outer wall portion 102, the elastic engaging piece 104 extends obliquely upward in the outer diameter direction from a position close to the tip portion 102a in the extending direction. The tip portion 104a of the elastic engaging piece 104 abuts and engages with the peripheral edge of the mounting hole 111 on the back surface of the mounted member 110 in the mounted state. The upper surface 104c of the elastic engaging piece 104 that abuts on the back surface of the attached member 110 is flat (see FIG. 4). The base portion 104b, which is a position extending from the outer wall portion 102 of the elastic engaging piece 104, is formed to be thicker than the tip portion 104a.

In this embodiment, the inner wall portion 101 extends longer than the outer wall portion 102 with respect to the connecting portion 103, and the tip portion 101a of the inner wall portion 101 projects downward from the tip portion 102a of the outer wall portion 102. The inner wall portion 101 extends longer than the outer wall portion 102 on the back side of the mounting hole 111. The protrusion length of the tip portion 101a of the inner wall portion 101 with respect to the tip portion 102a of the outer wall portion 102 is such that the outer wall portion 102 is pulled when the pulling force F is applied in the mounted state, as shown in FIG. 6 (c) described later. Even if it is extended, the length is set so that the tip portion 102a of the outer wall portion 102 does not protrude downward beyond the tip portion 101a of the inner wall portion 101.

The outer periphery of the portion from the base portion 104b of the elastic engaging piece 104 to the tip portion 102a of the outer wall portion 102 has a tapered wall whose diameter is reduced toward the tip portion 102a, which facilitates insertion into the mounting hole 111. There is.

Next, the operation of the fastener 100 will be described. As shown in FIG. 1, the fastener 100 is inserted and fixed in the mounting hole 111 in order to close the mounting hole 111 of the member to be mounted 110.

FIG. 5 shows the deformation process of the elastic engaging piece 104 and the outer wall portion 102 when the inner wall portion 101 and the outer wall portion 102 of the fastener 100 are inserted into the mounting holes 111 of the mounted member 110.

As shown in FIGS. (A) and (b), when the inner wall portion 101 and the outer wall portion 102 of the fastener 100 are inserted into the mounting holes 111 of the mounted member 110, the elastic engaging piece extending from the outer wall portion 102. The 104 comes into contact with the inner circumference of the mounting hole 111, the outer wall portion 102 is pressed inward via the elastic engaging piece 104 and deformed, and the intermediate portion 102b of the outer wall portion 102 comes into contact with the inner wall portion 101. The intermediate portion 102b of the outer wall portion 102 may be closest to the outer circumference of the inner wall portion 101 and does not necessarily come into contact with the outer wall portion 101.

When the outer wall portion 102 is further pushed in, as shown in FIG. 3C, the elastic engaging piece 104 is pressed against the inner circumference of the mounting hole 111 and deformed, and is formed by the intermediate portion 102b of the deformed outer wall portion 102. The deformed elastic engagement piece 104 can enter the recess and pass through the mounting hole 111 with a relatively low insertion resistance.

In this way, when the tip portion 104a of the elastic engaging piece 104 passes through the mounting hole 111, the elastic engaging piece 104 engages with the peripheral edge of the mounting hole 111 on the back surface of the mounted member 110 by the elastic restoring force. Further, the tip portion 105a of the flange portion 105 is pressed against and engaged with the peripheral edge of the mounting hole 111 on the surface of the mounted member 110. As a result, the mounted member 110 is sandwiched between the flange portion 105 and the elastic engaging piece 104, and the fastener 100 can be inserted and fixed in the mounting hole 111 of the mounted member 110. At this time, the peripheral edge of the mounting hole 111 on the front surface of the mounted member 110 is sealed by the flange portion 105, and the peripheral edge of the mounting hole 111 on the back surface of the mounted member 110 is sealed by the elastic engaging piece 104. Can be sealed with good airtightness.

Further, since the deformed elastic engaging piece 104 enters the recess formed by the intermediate portion 102b of the deformed outer wall portion 102 and passes through the mounting hole 111, the outer diameter of the outer wall portion 102 is brought closer to the inner diameter of the mounting hole 111. It is possible to reduce the gap between the outer circumference of the outer wall portion 102 and the inner circumference of the mounting hole 111 when the outer wall portion 102 is elastically restored, so that the fastener 100 is loosened in the radial direction when mounted in the mounting hole 111. It can be suppressed.

FIG. 6 shows the deformation process of the elastic engaging piece 104 and the outer wall portion 102 when the pulling force F acts on the fastener 100 thus mounted in the mounting hole 111 of the mounted member 110.

When the pulling force F acts in the state shown in FIG. (A), the elastic engaging piece 104 is pushed downward and deformed as shown in FIG. (B), and accordingly, the tip portion 102a of the outer wall portion 102a Deforms inward and comes into contact with the outer circumference of the inner wall portion 101. Further, when the pulling force F acts, as shown in FIG. 3C, the tip portion 102a of the outer wall portion 102 is strongly pressed against the outer periphery of the inner wall portion 101, but further deformation is suppressed by the inner wall portion 101. Therefore, the elastic engagement piece 104 is suppressed from being further deformed, and the thickest base portion 104b engages with the inner circumference of the mounting hole 111, so that a strong pull-out resistance force can be obtained.

When a strong pulling force F is applied to the outer wall portion 102 in a state where the elastic engaging piece 104 is engaged with the peripheral edge of the mounting hole 111 on the back surface of the mounted member 110, a force that stretches downward acts. Since the tip portion 101a of the inner wall portion 101 projects long downward from the tip portion 102a of the outer wall portion 102, it is possible to prevent the tip portion 102a from getting over the tip portion 101a and entering the inside. As a result, the elastic engaging piece 104 can be warped and disengaged, and the possibility that the fastener 100 is pulled out can be reduced.

The present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the gist of the present invention, and such embodiments are also included in the scope of the present invention. ..

For example, in the above embodiment, the front surface (upper surface in the drawing) of the closing portion 106 and the connecting portion 103 forms a continuous circular flat surface, but the closing portion 106 is in the middle of the inner wall portion 101 in the height direction. , Or it may be arranged at the lower end. When the closing portion 106 is arranged at the lower end portion of the inner wall portion 101, the upper surface side becomes a concave space.

Further, in the above embodiment, the inner wall portion 101 and the outer wall portion 102 have a cylindrical shape, but the inner wall portion 101 and the outer wall portion 102 have a square tubular shape, an elliptical shape when viewed in a plane, or an oval shape. It may be in the shape.

100 Fastener 101 Inner wall 101a Tip 102 Outer wall 102a Tip 102b Intermediate 103 Connecting 104 Elastic engagement piece 104a Tip 104b Base flange 105
105a Tip 105b Bottom 106 Block 110 Attached member 111 Mounting hole F Pulling force

Claims (4)

A fastener that can be attached to the mounting hole of the member to be mounted.
The inner wall that forms a cylinder and
An outer wall portion arranged concentrically with respect to the inner wall portion on the outside,
A connecting portion that connects the base end portion of the inner wall portion and the base end portion of the outer wall portion and is arranged on the front side of the mounting hole,
An elastic engaging piece of the outer wall portion that extends from the outer periphery on the tip side located on the back side of the mounting hole and engages with the back surface of the mounted member.
A flange portion extending from the outer periphery of the base end portion of the outer wall portion and engaging with the surface of the mounted member, and a flange portion.
A fastener characterized by including a closing portion that closes the inside of the inner wall portion. At the time of insertion into the mounting hole, a recess is formed when the intermediate portion of the outer wall portion is closest to the outer periphery of the inner wall portion, and the elastic engaging piece can be inserted into the recess. , The fastener according to claim 1. The fastener according to claim 1 or 2, wherein the tip end portion of the outer wall portion abuts on the outer periphery of the inner wall portion when a pulling force is applied while the attachment hole is attached. The fastener according to any one of claims 1 to 3, wherein the tip end portion of the inner wall portion extends longer than the tip end portion of the outer wall portion.

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