JP2024010759A - Fixture - Google Patents

Abstract

To provide a fixture which can attain sufficient extraction force.SOLUTION: A fixture 10 is attached to a recessed part which is formed recessed on a surface of a resin member and has a pair of protrusion parts which protrudes on an inner surface so as to be located close to each other. The fixture 10 includes: a support part 12 configured to be inserted into the recessed part and extending in a direction of insertion into the recessed part; and a pair of elastic leg parts 14 which is supported by the support part 12, may deflect so as to face and move close to each other, and is configured to engage with the protrusion parts. The elastic leg part 14 has a projection part projecting in a direction opposite to the direction of the insertion into the recessed part. The projection part has a shape which engages with the back side as seen in the insertion direction of the protrusion part so as to dig into the back side.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fixture that is attached to a recess formed in the surface of a resin member.

Patent Document 1 discloses a pipe attachment clamp having attachment legs that are attached to a fuel tank. The fuel tank has a mounting leg hole formed on the outer wall into which the mounting leg is inserted, and the mounting leg hole has a mounting leg hole protrusion formed on the inner surface of the side wall. A mounting leg locking piece is formed on the side surface of the mounting leg to be locked to the mounting leg hole protrusion.

JP2019-78356A

In the technique described in Patent Document 1, a mounting leg hole protrusion is formed for locking the mounting leg, but the projection height is limited due to the projection being formed on the outer wall of the fuel tank, so that the hooking distance is limited. It is difficult to secure enough removal force.

An object of the present invention is to provide a fixture that can provide sufficient removal force.

In order to solve the above problems, an aspect of the present invention is a fitting that is attached to a recessed part that is formed in a recessed manner on the surface of a resin member and has a pair of protuberances that protrude toward each other on the inner surface, A support part that is inserted into the recess and extends in the direction of insertion into the recess, and a pair of elastic legs that are supported by the support part, can be deflected so as to face each other and approach each other, and are locked to the protrusion. . The elastic legs have protrusions that protrude in a direction opposite to the direction of insertion into the recess. The protrusion has a shape that bites into and locks into the rear side of the protrusion in the insertion direction.

According to the present invention, it is possible to provide a fixture that can obtain sufficient removal force.

FIG. 3 is a perspective view of the fixture of the embodiment seen from below. FIG. 3 is a perspective cross-sectional view of the fixture of the embodiment seen from above. It is a side view of the fixture of an Example. FIG. 3 is a cross-sectional view of the fitting shown superimposed on the fuel tank. FIG. 3 is a cross-sectional view of the fitting attached to the fuel tank.

FIG. 1 is a perspective view of the embodiment fixture 10 seen from below. FIG. 2 is a perspective cross-sectional view of the fixture 10 of the embodiment seen from above. Moreover, FIG. 3 is a side view of the fixture 10 of the example.

The fixture 10 includes a support part 12, elastic legs 14 and a functional part 16. The fixture 10 attaches the functional component 16 to a recess 32 formed on the surface of the resin member. The resin member to which the fixture 10 is attached is, for example, a fuel tank for a vehicle, and a recessed portion is formed on the surface by injection molding. The functional component 16 functions as a pipe joint and connects the pipe exiting the fuel tank to another pipe. Fitting 10 is formed of a material that is stiffer than the fuel tank.

The functional component 16 includes a first protruding part 18a, a second protruding part 18b, a third protruding part 18c (referred to as "protruding part 18" if these are not distinguished), a first insertion part 20a, and a second protruding part 18c. It has an insertion part 20b and a third insertion part 20c (referred to as "insertion part 20" if these are not distinguished).

The projecting portion 18 is formed into a plate shape so as to project outward, and is formed to be flexible as an elastic piece. The first projecting portion 18a extends in the opposite direction to the second projecting portion 18b and the third projecting portion 18c. The projecting portion 18 comes into elastic contact with the surface of the fuel tank and suppresses rattling of the mounting tool 10 in the attached state. The insertion part 20 is inserted into a hose or piping. The plurality of insertion parts 20 extend in different directions orthogonal to the insertion direction D1 into the recess. Note that the insertion direction D1 is indicated by the vertical direction in FIG.

The support portion 12 is formed into a rectangular tube shape and extends from the functional component 16 along the insertion direction D1. The support part 12 is inserted into the recess of the fuel tank.

The elastic leg portion 14 is supported by the support portion 12 and extends from the support portion 12 toward the functional component 16 side. The pair of elastic legs 14 are formed to face each other and can be bent to approach and expand. The pair of elastic legs 14 protrudes outward from the support section 12 in the opposing direction D2. The opposing direction D2 of the pair of elastic legs 14 is perpendicular to the insertion direction D1 into the recess.

The elastic legs 14 lock into recesses in the fuel tank and attach the fitting 10 to the fuel tank. The elastic leg portion 14 has a protrusion 24 that protrudes in a direction opposite to the insertion direction D1 into the recess. That is, the protrusion 24 is formed to protrude upward. Thereby, the protrusion 24 bites into the recess of the fuel tank during attachment, and the removal force of the attachment 10 can be improved.

The protrusion 24 is formed to protrude from the upper end surface 26 of the elastic leg 14 . Thereby, the protrusion 24 is formed into a stable seating surface, so that the rigidity of the protrusion 24 can be ensured even though the protrusion 24 has a sharp shape.

This will now be explained with reference to new drawings. FIG. 4 is a cross-sectional view of the fitting 10 shown overlapping the recess 32 of the fuel tank 30. FIG. 4 shows a state in which no external force is applied to the fixture 10, shows a state in which the elastic legs 14 are not bent, and shows the extent to which the elastic legs 14 interfere with the recess 32 of the fuel tank 30. The projection 24 of the elastic leg 14 is set to sufficiently abut the recess 32. The protrusion 24 is located at the outer edge of the elastic leg 14 in the opposing direction D2, and the outer surface 28 of the protrusion 24 including the edge is formed into a plane along the insertion direction. In other words, the protrusion 24 does not extend outward from the elastic leg 14 in the opposing direction D2, but remains until it reaches the edge of the elastic leg 14. Thereby, since the protrusion 24 does not protrude outside in the facing direction D2, it does not interfere with the insertion operation when the elastic leg 14 is inserted into the recess, and it is possible to suppress an increase in insertion resistance.

A pair of protrusions 24 are formed on the upper end surface 26 apart in a width direction D3 that is orthogonal to the direction in which the pair of elastic legs 14 face each other and the insertion direction D1 into the recess. As a result, the pair of protrusions 24 bite into the recess of the fuel tank in a well-balanced manner, and movement of the attachment 10 around the central axis of the support portion 12 can be suppressed.

The protrusion 24 is formed into a protrusion so as to extend in the opposite direction of the pair of elastic legs 14, and is formed in a lying triangular prism state. Thereby, the corners of the protrusion 24 can be given length, and the corners of the protrusion 24 can be reliably brought into contact with the recessed portions and made to bite into the recesses. Moreover, the rigidity of the protrusion 24 can be ensured.

The rib 22 is formed on the outer surface 12a of the support portion 12, and is formed into a protrusion along the insertion direction D1. The ribs 22 abut against the recessed portions of the fuel tank to suppress rattling of the fixture 10. The rib 22 is located above the protrusion 24 and vertically spaced apart from the protrusion 24 .

FIG. 5 is a cross-sectional view of the fixture 10 attached to the fuel tank 30. FIG. 5(b) is an enlarged view of area A shown in FIG. 5(a). A recess 32 for attaching the fixture 10 is formed on the surface of the fuel tank 30.

The recess 32 is formed into a substantially rectangular cylinder shape with a bottom. Protrusions 34 that protrude toward each other are formed on opposing inner surfaces of the recess 32, respectively. The raised portion 34 is formed on the upper part of the recessed portion 32 and is formed to bulge out smoothly. If the recess 32 is formed by forced punching, there is a limit to the length by which the protrusion 34 protrudes inward. The elastic legs 14 lock onto the raised portions 34 .

The protrusion 24 has a shape that bites into and locks into the rear side of the protrusion 34 . The back side of the raised portion 34 refers to the lower side of the raised portion 34 shown in FIG. 5, with the bottom side of the recess 32 being the back side and the front side being the front side. The fitting 10 is made of a harder material than the fuel tank 30, and the protrusion 24 engages by recessing and biting into the protrusion 34. Thereby, the removal force of the fixture 10 can be improved.

The upper end surface 26 of the elastic leg portion 14 is inserted into the inner side of the raised portion 34 in the attached state, and overlaps with the raised portion 34 in the insertion direction D1. Since the protrusion 24 protrudes to the edge of the upper end surface 26, the protrusion 24 is arranged to easily bite into the protrusion 34, and the removal force can be improved.

As shown in FIG. 5(b), the rib 22 contacts the front side of the raised portion 34 in the attached state. On the other hand, the protrusion 24 is in contact with the rear side of the protrusion 34, so that the protrusion 34 can be sandwiched between the rib 22 and the protrusion 24. Thereby, rattling of the fixture 10 can be suppressed.

The present invention is not limited to the embodiments described above, and it is possible to make various design changes and other modifications to each embodiment based on the knowledge of those skilled in the art. Examples described herein may also be included within the scope of the present invention.

Although the embodiment has shown a mode in which the fixture 10 is attached to the fuel tank 30, the present invention is not limited to this mode. For example, it may be attached to an in-vehicle component or an interior panel made of a resin member. In any case, it is sufficient that a recess 32 for attaching the fixture 10 is formed on the surface of the resin member.

Further, in the embodiment, an embodiment is shown in which the functional component 16 is a pipe joint, but the present invention is not limited to this embodiment. For example, the functional component 16 may be a clip or band that holds a harness. Even if the functional component 16 is not a pipe joint, it may be molded integrally with the support portion 12.

Furthermore, in the embodiment, a mode has been shown in which the elastic legs 14 extend in the direction opposite to the insertion direction D1 (upward); however, the present invention is not limited to this mode, and the elastic legs 14 may extend downward. For example, the elastic leg portion 14 may extend downward and have a claw portion at its lower end that projects outward in the opposing direction D2, and the protrusion 24 may be formed on the claw portion.

DESCRIPTION OF SYMBOLS 10 attachment tool, 12 support part, 12a outer surface, 14 elastic leg part, 16 functional component, 18a 1st overhang part, 18b 2nd overhang part, 18c 3rd overhang part, 20a 1st insertion part, 20b 2nd insertion part, 20c 3rd insertion part, 22 rib, 24 protrusion, 26 upper end surface, 28 outer surface, 30 fuel tank, 32 recessed part, 34 raised part.

Claims (6)

A fixture that is attached to a recess that is formed in a recess on the surface of a resin member and has a pair of protuberances that protrude toward each other on the inner surface,
a support part inserted into the recess and extending in the direction of insertion into the recess;
a pair of elastic legs that are supported by the supporting portion, are deflectable so as to face each other and approach each other, and are locked to the raised portion;
The elastic leg has a protrusion that protrudes in a direction opposite to the insertion direction into the recess,
The attachment tool is characterized in that the protrusion has a shape that bites into and locks into the rear side of the protrusion in the insertion direction. 2. The protrusion is located on the outer edge of the elastic leg in the opposing direction, and the outer surface of the protrusion including the edge is formed into a plane along the insertion direction. fittings. The elastic leg portion has an end surface that slips into the rear side of the protrusion in the insertion direction in the attached state,
The fixture according to claim 1 or 2, wherein the protrusion is formed to protrude from the end surface. 4. The fixture according to claim 3, wherein a pair of the protrusions are formed on the end surface apart from each other in a width direction perpendicular to the opposing direction of the pair of elastic legs and the insertion direction, respectively. 4. The fixture according to claim 3, wherein the protrusion is formed as a protrusion so as to extend in opposite directions of the pair of elastic legs. The support part has a rib formed on an outer surface of the support part,
The fixture according to claim 1 or 2, wherein the rib abuts the protrusion on the front side of the protrusion in the insertion direction in the attached state.

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