JP2023027417A - Fastener - Google Patents

Abstract

To provide a fastener that can stably fit a component to a fitting member.SOLUTION: A fastener 10 comprises: a flange part 20 comprising an insertion hole into which a boss part of a first fitting member can be inserted; a pair of wall parts 24 opposed to each other, and extending from the flange part 20; and an elastic locking part 26 to be locked in a second fitting member. The wall parts 24 comprise claw parts formed in inner surfaces of the wall parts 24, and protruding in a direction in which the pair of wall parts 24 are opposed to each other. The claw parts are locked in the boss part by relative rotation of the boss part and the fastener 10 around an axis, and outer surfaces of the pair of wall parts 24 is in contact with the first fitting member or the second fitting member in a fitting state.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fastener for attaching a first mounting member to a second mounting member.

Patent Literature 1 discloses a clip for attaching a mounting member to a plate. The clip includes an anchor inserted into a mounting hole of the plate, and a cylindrical mounting seat coupled to a cylindrical base protruding from the mounting member. The mounting seat has a plurality of blades on its inner peripheral surface. The mounting seat is inserted into the base of the mounting member along the axis from the tip side, and rotated around the axis, so that the blade part bites into the peripheral surface of the base and is connected.

JP 2008-116035 A

In the clip disclosed in Patent Document 1, when the blade portion is coupled to the peripheral surface of the pedestal, the attachment seat may be deformed so as to swell radially outward, reducing the biting amount.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fastener that is stably attached to the boss portion of the first attachment member.

In order to solve the above problems, one aspect of the present invention provides a fastener used for attaching a first attachment member to a second attachment member, the fastener having an insertion hole through which the boss portion of the first attachment member can be inserted. a pair of wall portions facing each other and extending from the flange portion; and a locking portion that locks to the second mounting member. The wall portion has claw portions that are formed on the inner surface of the wall portion and protrude in a direction in which the pair of wall portions face each other. The pawl portion is engaged with the boss portion by relative rotation of the boss portion and the fastener around the axis, and the outer surfaces of the pair of wall portions abut against the first mounting member or the second mounting member in the mounted state.

ADVANTAGE OF THE INVENTION According to this invention, the fastener which is stably attached with respect to the boss|hub part of a 1st attachment member can be provided.

1 is a perspective view of an example fastener; FIG. FIG. 2(a) is a side view of the fastener, and FIG. 2(b) is a front view of the fastener. Fig. 10 is a plan view of the fastener; It is the perspective view seen from the back side of the 1st attachment member. It is a figure which shows the fastener of the state attached to the 1st attachment member and the 2nd attachment member. It is a figure for demonstrating rotation operation|movement of the fastener with respect to a 1st attachment member, and is a figure which shows the state before attaching to a 2nd attachment member. It is a sectional view of a fastener of the state where attachment to the 1st attachment member and the 2nd attachment member was completed. It is a perspective view of the fastener of a modification. FIG. 9(a) is a side view of a modified fastener, and FIG. 9(b) is a front view of the modified fastener. FIG. 9B is a cross-sectional view along line BB of the fastener in the attached state shown in FIG. 9A;

FIG. 1 is a perspective view of an example fastener 10. FIG. FIG. 1(a) is a perspective view of the fastener 10 viewed from above, and FIG. 1(b) is a perspective view of the fastener 10 viewed from below. 2(a) is a side view of the fastener 10, and FIG. 2(b) is a front view of the fastener 10. FIG. 3 is a plan view of the fastener 10. FIG.

A fastener 10 is used to attach the first mounting member to the second mounting member. For example, the fasteners 10 are used to fix vehicle parts such as interior decorative cover materials, trim materials, and garnish materials to vehicle body panels and interior panels. That is, the first mounting member is the vehicle-mounted component, and the second mounting member is the vehicle body panel or the interior panel. Also, the first mounting member may be an interior panel, and the second mounting member may be a vehicle body panel.

The fastener 10 is rotatable about the axis with respect to the first mounting member, and is attached to the first mounting member by rotating about the axis. On the other hand, the fastener 10 is attached to the second attachment member so as not to rotate around the axis. The fastener 10 includes a flange portion 20 , a pair of post portions 22 , a pair of wall portions 24 , a plurality of elastic locking portions 26 and a connecting portion 28 .

The flange portion 20 is formed in a disc shape. The flange portion 20 has an insertion hole 30 through which the boss portion of the first mounting member can be inserted, and a rotation stop portion 32 projecting radially outward from the outer peripheral edge of the flange portion 20 . The rotation stop portion 32 is provided to stop rotation of the fastener 10 about the axis with respect to the first mounting member.

A pair of pillars 22 extend from the rear surface of the flange portion 20 . The direction in which the column portion 22 extends is called the axial direction. The connecting portion 28 connects the tip portions of the pair of pillars 22 . The connecting portion 28 is located on the tip side of the wall portion 24 and the elastic locking portion 26 . The flange portion 20 side of the column portion 22 is referred to as a base end portion, and the lower end side of the fastener 10 shown in FIG.

A pair of wall portions 24 are opposed to each other and extend from the flange portion 20 . The ends of the pair of wall portions 24 are connected by a connecting portion 28 . The direction in which the pair of walls 24 face each other is called the facing direction, and the facing direction is orthogonal to the axial direction. The wall portion 24 has claw portions 34 formed on the inner surface of the wall portion 24 and ribs 36 formed on the outer surface. The rib 36 is formed in a tapered shape so as to taper outward in the opposing direction. A plurality of claw portions 34 are provided side by side along the axial direction on the inner surface of the wall portion 24 and protrude inward in the direction in which the pair of wall portions 24 face each other. As shown in FIG. 3 , the claw portion 34 protrudes radially inward from the insertion hole 30 . The claw portion 34 can be locked so as to bite into the boss portion of the first mounting member inserted into the insertion hole 30 .

The elastic locking portion 26 functions as a locking portion that locks onto the second mounting member. A plurality of elastic locking portions 26 extend from the connecting portion 28 toward the flange portion 20 . As shown in FIGS. 2(a) and 2(b), four elastic locking portions 26 are formed, two elastic locking portions 26 are provided so as to face each other, and a column portion is provided between the opposing elastic locking portions 26. 22 are located respectively.

The elastic locking portion 26 has a locking surface 38 that locks onto the rear edge of the mounting hole formed in the second mounting member. As shown in FIG. 2(a), the locking surface 38 is inclined toward the insertion hole 30 in the facing direction so as to approach the central axis. The elastic locking portion 26 extends from a position on the distal end side of the wall portion 24 . Thereby, the axial length of the elastic locking portion 26 can be made longer than the wall portion 24, and the elastic locking portion 26 can be easily bent. By configuring the elastic locking portion 26 to be easily bent, it is possible to suppress the insertion force when inserting the elastic locking portion 26 into the mounting hole. On the other hand, since the wall portion 24 is shortened, it becomes difficult to bend. The wall portion 24 is formed wider than the column portion 22 . The width of the column portion 22, the wall portion 24, and the elastic locking portion 26 is the length in the direction perpendicular to the facing direction and the axial direction.

The connecting portion 28 connects all the tip portions of the column portion 22 , the wall portion 24 and the elastic locking portion 26 . Thereby, the rigidity of the fastener 10 can be ensured. By connecting the pair of pillars 22 and the pair of walls 24 with the connecting portion 28, the pillars 22 and the walls 24 can be configured to be less likely to bend.

4 is a perspective view of the first mounting member 12. FIG. The first mounting member 12 has a plate portion 40 , a boss portion 42 , a pair of stoppers 44 , a pair of wall portions 46 and a hemispherical protrusion 48 . The boss portion 42 protrudes from the back surface of the plate portion 40 and is formed in a columnar shape. The fastener 10 is connected to the boss portion 42 by the claw portion 34 .

The boss portion 42 is formed by cutting a cylinder into a pair of notch portions 42a along the axial direction. The boss portion 42 has a pair of curved surfaces 42b and a pair of recessed portions 42c recessed by notch portions 42a. The curved surface 42b is an outer peripheral surface having an arcuate cross section. Curved surfaces 42b and recessed portions 42c are alternately formed in the boss portion 42 in the circumferential direction. The pair of curved surfaces 42b are positioned diagonally, and the pair of recessed portions 42c are positioned diagonally. The outer diameter of the pair of curved surfaces 42b is larger than the outer diameter of the pair of recessed portions 42c. In other words, the boss portion 42 has a long diameter defined by the curved surface 42b and a short diameter defined by the recessed portion 42c.

A pair of stoppers 44 protrude from the back surface of the plate portion 40 and abut against the rotation stopping portion 32 to stop the rotation of the fastener 10 . A pair of wall portions 46 protrude from the back surface of the plate portion 40 and face each other. The stopper 44 and the wall portion 46 may interfere with the rotation stopping portion 32 of the fastener 10 to limit the assembly position of the fastener 10 . The hemispherical protrusion 48 is formed so as to protrude from the back surface of the plate portion 40 and abuts on the rotation stopping portion 32 of the fastener 10 to restrain the rotation of the fastener 10 .

5 shows the fastener 10 attached to the first attachment member 12 and the second attachment member 14. FIG. A rectangular mounting hole 14 a is formed in the second mounting member 14 . The plurality of elastic engaging portions 26 are engaged with the rear edge of the mounting hole 14a to attach the fastener 10 to the second mounting member 14. As shown in FIG.

Rotation of the fastener 10 with respect to the second mounting member 14 is restricted by locking the four elastic locking portions 26 in the vicinity of the four corners of the mounting hole 14a. The wall portion 46 is axially longer than the flange portion 20 and abuts against the second mounting member 14 in the mounted state to limit the approach of the first mounting member 12 and the second mounting member 14 . The rib 36 of the wall portion 24 is recessed into the mounting hole 14a.

FIG. 6 is a diagram for explaining the rotational movement of the fastener 10 with respect to the first mounting member 12, and shows the state before being mounted on the second mounting member 14. FIG. FIG. 6(a) shows the state before the attachment to the first mounting member 12 is completed, and FIG. 6(b) shows the state after the attachment to the first mounting member 12 is completed.

In FIG. 6(a), the boss portion 42 is inserted into the insertion hole 30 of the fastener 10 and is housed between the claw portions 34 facing each other in close proximity. The interval between the opposing claw portions 34 is set to be substantially the same as the minor axis RS of the boss portion 42 or longer than the minor axis RS. Therefore, the claw portion 34 approaches or abuts on the boss portion 42, but is not strongly pressed against it.

As a result, the boss portion 42 is smoothly inserted into the insertion hole 30 when the position of the recessed portion 42 c of the boss portion 42 is aligned with the facing direction of the claw portion 34 . On the other hand, if the position of the curved surface 42b of the boss portion 42 is aligned with the facing direction of the claw portion 34, the insertion of the boss portion 42 becomes extremely difficult. This is because the base end portion and the tip end portion of the wall portion 24 are connected to the flange portion 20 and the connecting portion 28, so that the wall portion 24 is configured to be difficult to bend.

After the boss portion 42 is inserted into the insertion hole 30, the fastener 10 is rotated around the axis shown in FIG. 6(a). When the fastener 10 is rotated, the rotation stopping portion 32 shown in FIG. 3 hits the stopper 44 shown in FIG. 4 and is stopped at a position rotated by 90°. Further, the hemispherical projection 48 prevents the claw portion 34 from rotating in the unlocked direction. The interval between the opposing claw portions 34 is set to be shorter than the length RL of the boss portion 42 .

When the fastener 10 rotates about its axis, the claw portion 34 hits the curved surface 42b and engages the curved surface 42b. The claw portion 34 is engaged with the curved surface 42b so as to bite into it means that the curved surface 42b is pressed to be recessed and fitted into the recessed curved surface 42b. That is, the pawl portion 34 is engaged with the boss portion 42 by the relative rotation of the boss portion 42 and the fastener 10 around the axis. Thereby, the fastener 10 is attached to the first attachment member 12 .

Since the fastener 10 is engaged with the boss portion 42 of the first mounting member 12, there is no need to form a mounting hole for the fastener 10 in the first mounting member 12, and the design of the plate portion 40 of the first mounting member 12 is improved. degree of freedom can be increased. Moreover, since the fastener 10 is attached by rotation, a space for allowing the fastener 10 to slide with respect to the first attachment member 12 is not required.

The curved surface 42b that is smooth in the circumferential direction facilitates the rotation of the fastener 10 while the claw portion 34 presses the curved surface 42b. Further, since the column portion 22 is connected to the flange portion 20 and the connecting portion 28, the fastener 10 is less likely to be twisted when it rotates. Since the pair of pillars 22 are positioned on both sides of the boss 42 in the width direction, it is possible to prevent the fastener 10 from tilting in the width direction with respect to the boss 42 .

FIG. 7 is a cross-sectional view of the fastener 10 after being completely attached to the first attachment member 12 and the second attachment member 14. As shown in FIG. A plurality of claw portions 34 engage with the curved surface 42b of the boss portion 42 so as to bite into the curved surface 42b.

In the attached state, the outer surfaces (ribs 36) of the pair of wall portions 24 are in contact with the inner surface of the attachment hole 14a, so that the outward deformation of the pair of wall portions 24 in the facing direction is restricted. By restricting the deformation of the wall portion 24 in this way, it is possible to make it difficult for the claw portion 34 to be disengaged. Further, when the fastener 10 is rotated and the claw portion 34 is engaged with the boss portion 42 , the wall portion 24 may be slightly deformed by receiving an outward force from the boss portion 42 . However, since the outer surface of the wall portion 24 abuts against the inner surface of the mounting hole 14a, the wall portion 24 receives an inward force in the opposing direction from the inner surface of the mounting hole 14a, and the claw portion 34 does not sufficiently bite into the boss portion 42. can. Moreover, since the tip portions of the pair of wall portions 24 are connected by the connecting portion 28, the wall portions 24 are difficult to expand. Since the pair of pillars 22 are formed over the flange 20 and the connecting portion 28, deformation of the pair of walls 24 that bends outward in the facing direction to shorten the axial length of the walls 24 can be suppressed. can be done.

By locking the plurality of claw portions 34 in parallel in the axial direction, the fastener 10 is less likely to be inclined with respect to the boss portion 42 . By locking the plurality of claw portions 34 to the boss portion 42, it is possible to secure the removal force even if the biting amount of each piece is reduced. By reducing the biting amount of each of the claws 34, it is possible to reduce the rotational operating force of the fastener 10 and suppress the amount of change in the outward direction of the pair of walls 24 in the opposing direction. Moreover, since any claw portion 34 may be locked, the fastener 10 is less likely to come off from the boss portion 42 .

The locking surface 38 of the elastic locking portion 26 and the wall portion 24 are provided so as to overlap each other in the axial position. That is, the axial positions of the locking surface 38 and the wall 24 partially overlap and are arranged at similar heights. Thereby, the axial length of the fastener 10 can be shortened, and the interval between the first mounting member 12 and the second mounting member 14 can be set to be short. That is, since the first mounting member 12 can be mounted closer to the second mounting member 14, a stable mounting state can be obtained.

A method of attaching the fastener 10 will be described. The boss portion 42 of the first mounting member 12 is inserted into the insertion hole 30 of the fastener 10 , the first mounting member 12 is rotated about its axis, and the claw portion 34 bites into the curved surface 42 b of the boss portion 42 . do. Next, the fastener 10 is inserted into the mounting hole 14a of the second mounting member 14 from the connecting portion 28 side, and the elastic locking portion 26 is locked to the edge of the mounting hole 14a, so that the second mounting member 14 is secured. It is attached. Thereby, the first attachment member 12 is attached to the second attachment member 14 .

FIG. 8 is a perspective view of a modified fastener 100. FIG. Moreover, Fig.9 (a) is a side view of the fastener 100 of a modification, and FIG.9(b) is a front view of the fastener 100 of a modification. FIG. 9( a ) shows the fastener 100 attached to the first mounting member 12 and the second mounting member 14 , and the first mounting member 12 and the second mounting member 14 differ from the fastener 100 in cross section. is shown. 10 is a cross-sectional view of the fastener 100 in the attached state shown in FIG. 9(a) taken along the line BB.

The modified fastener 100 differs from the fastener 10 shown in FIG. In the fastener 10 shown in FIG. 1A, the elastic locking portion 26 is provided above the connecting portion 28, but in the fastener 100 shown in FIG. 126 are provided.

The fastener 100 includes a flange portion 120 , a post portion 122 , a wall portion 124 , an elastic locking portion 126 , a connecting portion 128 , an umbrella portion 50 and a shaft portion 52 . The flange portion 120, the column portion 122, the wall portion 124 and the elastic locking portion 126 of the modified example have the same functions as the flange portion 20, the column portion 22, the wall portion 24 and the elastic locking portion 26 shown in FIG. have

An insertion hole 130 through which the boss portion 42 can be inserted is formed in the flange portion 120 . The pair of pillars 122 and the pair of walls 124 are supported at their proximal and distal ends by the flange portion 120 and the connecting portion 128 . A claw portion 134 is formed on the inner surface of the wall portion 124 and a rib 136 is formed on the outer surface thereof. A plurality of claw portions 134 are provided in parallel along the axial direction.

The connecting portion 128 is provided to face the flange portion 120 and connects the tip portions of the pair of pillar portions 122 and the pair of wall portions 124 . An umbrella-shaped portion 50 protrudes from the outer peripheral edge of the connecting portion 128 . The umbrella-like portion 50 abuts on the surface of the second mounting member 14 as shown in FIG. 9(a). The fastener 100 can be used for waterproofing by closing the attachment hole 14a with the umbrella-shaped portion 50. As shown in FIG.

The elastic locking portion 126 is provided on the back side of the connecting portion 128 . The shaft portion 52 extends from the rear surface of the connecting portion 128 , and the elastic locking portion 126 extends from the distal end portion of the shaft portion 52 toward the connecting portion 128 side. FIG. 9( a ) shows how the elastic locking portion 126 is locked to the rear edge of the mounting hole 14 a of the second mounting member 14 . The attachment hole 14a shown in FIG. 9(a) may be circular. In the fastener 100, since the structure to be engaged with the second mounting member 14 is provided on the back side of the connecting portion 128, the degree of freedom in design is high. Therefore, the configuration for locking to the second mounting member 14 is not limited to the shape of the elastic locking portion 126, and another mounting method may be used. For example, it may have a structure that engages with a stud bolt provided on the second mounting member 14 .

In FIG. 10, the rotation stop portion 132 is located between the wall portion 46 and the hemispherical protrusion 48, and the rotation of the fastener 10 is restricted in the attached state. Of course, if the fastener 10 is rotated with a large force during attachment and detachment, it is possible for the anti-rotation portion 132 to climb over the hemispherical protrusion 48 .

As shown in FIGS. 9A and 10, the claw portion 134 engages the boss portion 42 so as to bite into it. In the attached state, the outer surfaces (ribs 136) of the pair of wall portions 124 abut against the wall portion 46 of the first attachment member 12, and the outward deformation of the pair of wall portions 124 in the opposing direction is restricted. This makes it difficult for the wall portion 124 to bend, and prevents the claw portion 134 from being disengaged. Further, when the fastener 100 is rotated and the claw portion 134 is engaged with the boss portion 42 , the wall portion 124 may be slightly deformed by receiving an outward force from the boss portion 42 . However, since the outer surface of the wall portion 124 abuts against the wall portion 46 of the first mounting member 12, the wall portion 124 receives an inward force in the opposing direction from the wall portion 46 of the first mounting member 12, causing the claw portion 134 to move toward the boss. It can sufficiently bite into the portion 42 .

The present invention is not limited to the embodiments described above, and modifications such as various design changes can be made to each embodiment based on the knowledge of those skilled in the art. Examples may also be included within the scope of the present invention.

Reference Signs List 10 Fastener 12 First mounting member 14 Second mounting member 14a Mounting hole 20 Flange portion 22 Column portion 24 Wall portion 26 Elastic locking portion 28 Connecting portion 30 Insertion hole 32 Rotation stopper .

Claims (5)

A fastener used to attach a first attachment member to a second attachment member, comprising:
a flange portion having an insertion hole through which the boss portion of the first mounting member can be inserted;
a pair of wall portions facing each other and extending from the flange portion;
a locking portion that locks to the second mounting member;
the wall portion has a claw portion formed on an inner surface of the wall portion and protruding in a direction in which the pair of wall portions face each other;
The claw portion is engaged with the boss portion by relative rotation of the boss portion and the fastener about the axis, and the outer surfaces of the pair of wall portions are in contact with the first mounting member or the second mounting member in the mounted state. A fastener characterized by 2. The fastener according to claim 1, wherein a plurality of said claw portions are provided side by side along the axial direction. a connecting portion that connects the tip portions of the pair of wall portions;
and a pair of pillars extending from the flange,
3. The fastener according to claim 1, wherein the connecting portion connects the tip portions of the pair of pillars. the locking portion has a plurality of elastic locking portions extending from the connecting portion toward the flange portion;
The elastic locking portion is locked to the edge of the mounting hole formed in the second mounting member,
the outer surfaces of the pair of wall portions are in contact with the inner surfaces of the mounting holes of the second mounting member;
4. The fastener according to claim 3, wherein the locking surface of the elastic locking portion and the wall portion are provided so as to overlap each other in the axial position. 5. The fastener according to claim 4, wherein the elastic locking portion extends from a position on the distal end side of the pair of wall portions.

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