WO2021117588A1

WO2021117588A1 - Fastener and member attachment structure in which fastener is used

Info

Publication number: WO2021117588A1
Application number: PCT/JP2020/044961
Authority: WO
Inventors: 光清田; 井上　正俊
Original assignee: 株式会社パイオラックス
Priority date: 2019-12-11
Filing date: 2020-12-03
Publication date: 2021-06-17

Abstract

Provided are a fastener and a member attachment structure in which said fastener is used, the fastener and structure being such that the number of components can be reduced and the cost can be lowered. This fastener 10 fixes a first member 1 and a second member 3 to each other and has a head part 20, an insertion part 30 extending from the reverse side of the head part, a retaining protrusion 31 provided to the distal-end side of the insertion part, and a flexurally deformable elastic piece 40 that is located on the outer periphery of the insertion part and extends toward the head part 20 from a prescribed axial-direction position. The elastic piece 40 has a first contact part 45 that elastically comes into contact with the inner periphery of a first attachment hole 2 in a state in which the insertion part 30 has been inserted through the first attachment hole 2 and a second attachment hole 4 and rotated in a member-fixing direction R to fix the members 1, 3 to each other, and a second contact part 49 that is pressed against the reverse-side peripheral edge of the second attachment hole 4 in said state of fixture.

Description

Member mounting structure using fasteners and fasteners

The present invention relates to a resin fastener for fixing the first member and the second member to each other, and a member mounting structure for fixing the first member and the second member to each other by using the fastener.

Conventionally, there is a member mounting structure consisting of a clip and a pin for fixing the first member to the second member.

For example, in Patent Document 1 below, a clip formed by bending a metal plate material in a substantially U shape and a pin formed of a metal material and formed of a shaft portion and a radial protrusion provided on the tip end side of the shaft portion are provided. The member mounting structure provided is described. The clip has a first plate portion and a second plate portion that are opposed to each other via a connecting portion, and a pin locking portion that is bent and formed in a mountain shape on the second plate portion side. Further, a first insertion hole is formed in the first plate portion, and a second insertion hole is formed in the pin locking portion of the second plate portion.

Then, with the first member sandwiched between the two plate portions and the clip attached to the first member, the first member and the second member are overlapped, and the shaft portion of the pin is made into the first and second insertion holes. Insert and rotate. Then, the radial protrusion of the pin is locked to the pin locking portion of the clip, so that both members are fixed to each other via the clip and the pin.

International release WO2013 / 118211

Since the member mounting structure of Patent Document 1 is composed of two members, a clip and a pin, the number of parts is large and the cost is high.

Therefore, an object of the present invention is to provide a fastener capable of reducing the number of parts and reducing the cost, and a member mounting structure using the fastener.

In order to achieve the above object, one of the present inventions is to insert the first mounting hole formed in the first member and the second mounting hole formed in the second member and rotate the member in a predetermined fixing direction. A resin fastener that fixes the first member and the second member to each other, and extends from the head abutting the front side of the second member and the back side of the head, and the first member. An insertion portion to be inserted into the mounting hole and the second mounting hole, and an insertion portion provided on the tip end side of the insertion portion, and the insertion portion is inserted into the first mounting hole and the second mounting hole in the member fixing direction. A retaining protrusion that engages with the back peripheral edge of the first mounting hole when rotated, and a bending deformation that extends from a predetermined position in the axial direction toward the head side of the outer peripheral portion of the insertion portion. It has a possible elastic piece, and the elastic piece is provided on the side opposite to the retaining protrusion in the radial direction and on the proximal end side in the axial direction, or is provided with respect to the retaining protrusion. It is provided in the radial direction and on the axial base end side, and in the elastic piece, the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction. A first contact portion that elastically contacts the inner circumference of the first mounting hole with the first member and the second member fixed to each other, and a peripheral edge on the back side of the second mounting hole in the fixed state. It is characterized by having a second contact portion that is pressed against.

Another aspect of the present invention is a member mounting structure in which the first member and the second member are fixed to each other by using the fastener, and the peripheral edge on the back side of the first mounting hole is the said. When the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction, the first ridge portion over which the retaining protrusion can be overcome and the retaining protrusion are in contact with each other. It has a second mountain portion that is in contact with the insertion portion and serves as a rotation stopper, and a fitting recess that is provided between the first mountain portion and the second mountain portion and into which the retaining protrusion is fitted. The first member is made of resin, and the first mountain portion, the second mountain portion, and the fitting recess are integrally formed with the first member.

According to the fastener of the present invention, when the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction, the retaining protrusion engages with the back peripheral edge of the first mounting hole. The first member is sandwiched by the first contact portion that elastically contacts the inner circumference of the first mounting hole, and the head that contacts the front side of the second member and the back peripheral edge of the second mounting hole. The second member is sandwiched between the pressed second contact portion, and the first member and the second member can be fixed to each other. At this time, since the first contact portion provided on the elastic piece elastically contacts the inner circumference of the first mounting hole, rattling and misalignment of the fastener can be suppressed, and the elastic piece is provided. The second contact portion is pressed against the back peripheral edge of the second mounting hole, and the second member is sandwiched between the second member and the head with a high holding force. Therefore, the second member rattles with respect to the first member. Can be fixed while reducing the amount. The fastener itself is made of resin, and the first contact portion and the second contact portion provided on the elastic piece exert the above-mentioned actions, so that a metal clip is unnecessary. It is possible to reduce the number of parts and reduce the cost.

Further, in the member mounting structure of the present invention, when the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction, the retaining protrusion overcomes the first mountain portion and the first Since it is fitted into the fitting recess provided between the mountain portion and the second mountain portion that serves as the rotation stopper of the insertion portion, the rotation of the insertion portion is restricted by the second mountain portion through the fastener. The first member and the second member can be fixed to each other. Further, in this member mounting structure, since the first member is made of resin in addition to the fastener, the cost of the entire member mounting structure can be reduced.

It is a perspective view which shows one Embodiment of the fastener and member mounting structure which concerns on this invention. The first member constituting the member mounting structure is shown, (a) is a partially enlarged plan view thereof, and (b) is a partially enlarged bottom view. It is an enlarged perspective view of the fastener. It is a front view of the fastener. It is a side view of the fastener. It is a bottom view of the fastener. It is a top view of the fastener. FIG. 5 is an enlarged perspective view of a main part showing a state before the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction in the fastener and the member mounting structure. FIG. 5 is a cross-sectional view taken along the line of arrow AA of FIG. It is sectional drawing in the line of sight of BB of FIG. In the same fastener and member mounting structure, an enlarged perspective view of a main part showing a state when the insertion portion is inserted into the first mounting hole and the second mounting hole and then rotated to allow the retaining protrusion to get over the first mountain portion. is there. It is sectional drawing in the line of sight of DD of FIG. FIG. 5 is an enlarged perspective view of a main part showing a state in which the first member and the second member are fixed by rotating the insertion portion after inserting the insertion portion into the first mounting hole and the second mounting hole in the fastener and the member mounting structure. It is sectional drawing in the line of sight of EE of FIG. The state in which the second contact portion bites into the inner circumference of the second mounting hole when the first member and the second member are fixed by rotating the insertion portion after inserting it into the first mounting hole and the second mounting hole. It is an enlarged perspective view of a main part when the first member is removed. It is a perspective view which shows the other embodiment of the fastener and member mounting structure which concerns on this invention. It is a front view of the fastener. It is a side view of the fastener. It is sectional drawing in the GG arrow line of FIG. It is a partially enlarged bottom view of the first member constituting the member mounting structure. FIG. 5 is an enlarged perspective view of a main part showing a state before the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction in the fastener and the member mounting structure. FIG. 2 is a cross-sectional view taken along the line of sight of the arrow H of FIG. 21. In the same fastener and member mounting structure, an enlarged perspective view of a main part showing a state when the insertion portion is inserted into the first mounting hole and the second mounting hole and then rotated to allow the retaining protrusion to get over the first mountain portion. is there. FIG. 3 is a cross-sectional view taken along the line of arrow I-I in FIG. 23. FIG. 5 is an enlarged perspective view of a main part showing a state in which the first member and the second member are fixed by rotating the insertion portion after inserting the insertion portion into the first mounting hole and the second mounting hole in the fastener and the member mounting structure. It is sectional drawing in the line of sight of JJ of FIG.

Hereinafter, an embodiment of a fastener according to the present invention and a member mounting structure using the fastener will be described with reference to the drawings.

As shown in FIG. 1, the fastener 10 is inserted into a first mounting hole 2 formed in the first member 1 and a second mounting hole 4 formed in the second member 3 to fix a predetermined member. The first member 1 and the second member 3 are fixed to each other by rotating in the direction R (see FIG. 8). Further, in this member mounting structure, the first member 1 and the second member 3 are fixed to each other by using the fastener 10.

Examples of the first member in this embodiment include an undercover arranged at the bottom of the vehicle, a vehicle body panel, a vehicle body frame, and the like. On the other hand, examples of the second member include a maintenance cover that is detachably attached to the lower surface side of the undercover, a trim board, a garnish, a bumper, and the like. The first member 1 in this embodiment is an undercover formed with a predetermined thickness, and the second member 3 is a maintenance cover. Further, the second member 3 which is a maintenance cover has a plate shape thinner than that of the first member 1. However, the first member and the second member are not limited to the above members.

The fastener 10 in this embodiment extends from the head 20 that abuts on the front side of the second member 3 and the back side of the head 20, and is inserted into the first mounting hole 2 and the second mounting hole 4. It has a part 30 and. Further, on the tip side of the insertion portion 30, when the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R, the insertion portion 30 is engaged with the back peripheral edge of the first mounting hole 2. A pair of retaining

protrusions

31, 31 are provided, respectively.

In FIG. 1, the insertion direction of the insertion portion 30 of the fastener 10 with respect to the first mounting hole 2 and the second mounting hole 4 is indicated by the reference numeral “F”, which is referred to as the “back side” of the head 20. Means the side of the insertion portion 30 with respect to the mounting

holes

2 and 4 facing the insertion direction F, and the "front side" in the second member 3 means the side opposite to the insertion direction F. In the following description, this is the first member and the first mounting hole, the second member and the second mounting hole, and each part of the fastener (head, retaining protrusion, elastic piece, first main part, The same meaning applies to the "front side" and "back side" in the second contact portion, etc.). Further, when the first member 1 is an undercover and the second member 3 is a maintenance cover as in this embodiment, the "front side" is the side facing the outside of the vehicle, and the "back side" is the vehicle. It can be said that it is the side facing inward.

Further, as shown in FIG. 2, the first mounting hole 2 formed in the first member 1 has a groove portion extending with a constant width from a circular central hole 2a and a radially opposed position of the central hole 2a. It has a substantially keyhole shape consisting of 2b and 2c. Further, as shown in FIGS. 1 and 2B, the inner circumference 2d on the front side of the central hole 2a has a tapered shape in which the front side of the first member 1 has an enlarged diameter and the diameter is gradually reduced toward the back side. ..

Further, on the back peripheral edge of the first mounting hole 2, the retaining protrusion 31 can be overcome when the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R. The first mountain portion 5 and the retaining protrusion 31 are in contact with each other and are provided between the second mountain portion 6 which serves as a rotation stopper for the insertion portion 30 and the first mountain portion 5 and the second mountain portion 6 to be pulled out. It has a fitting recess 7 into which the stop protrusion 31 is fitted. Further, the first member 1 is made of resin, and the first mountain portion 5, the second mountain portion 6, and the fitting recess 7 are integrally formed with the first member 1.

As shown in FIG. 2A, in this embodiment, the first mountain portion is on one side of the first mounting hole 2 in the longitudinal direction L and in one of the width directions (direction orthogonal to the longitudinal direction L). 5. A second mountain portion 6 is formed on the other side in the width direction. Further, on the other side of the first mounting hole 2 in the longitudinal direction L, a second mountain portion 6 is formed on one side in the width direction thereof, and a first mountain portion 5 is formed on the other side in the width direction. Further,

fitting recesses

7 and 7 are formed in the middle of the first mounting hole 2 in the longitudinal direction L, one in the width direction and the other in the width direction, respectively.

Further, the second mountain portion 6 is projected higher than the first mountain portion 5 from the back side of the first member 1. Further, the inner surface (the surface facing the fitting recess 7) of each of the

mountain portions

5 and 6 is perpendicular to the surface direction of the first member 1, and the outer surface (the surface opposite to the inner surface) is an inclined surface. ing. Therefore, when the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R, as shown in FIGS. 10 and 12, the retaining protrusion 31 has a first mountain. It is possible to fit into the fitting recess 7 by overcoming the inclined outer surface 5a of the portion 5. Further, as shown in FIG. 12, when the retaining protrusion 31 is fitted in the fitting recess 7 and the member is to be further rotated in the member fixing direction R, it comes into contact with the inner surface of the second mountain portion 6. Therefore, the rotation of the insertion portion 30 is restricted.

On the other hand, as shown in FIG. 1, the second mounting hole 4 provided in the second member 3 has a shape suitable for the first mounting hole 2, and has a circular central hole 4a and the same. It has a substantially keyhole shape and is composed of

groove portions

4b and 4c extending with a constant width from the radially opposed positions of the central hole 4a.

The first member and the second member described above may have at least a first mounting hole and a second mounting hole, and are not limited to the above shape. Further, the first mounting hole and the second mounting hole are not limited to the above-mentioned keyhole shape, and any type as long as the retaining protrusion on the fastener side can be inserted and the fastener can be rotated. It may be in shape.

Returning to the description of the fastener 10, in this embodiment, as shown in FIG. 6, a tool insertion groove 21 having a constant width and a long groove shape is formed in the center of the front side of the head 20. The tip of a tool (such as a flat-blade screwdriver) (not shown) is inserted into the tool insertion groove 21 so that the fastener 10 can be rotated. Further, a pair of through

holes

23, 23 penetrating the head 20 are formed on both sides of the tool insertion groove 21.

The insertion portion 30 has a substantially cylindrical shape extending from the central portion on the back side of the head 20 by a predetermined length. A pair of retaining

protrusions

31, 31 are projected from the outer periphery of the tip portion of the insertion portion 30 in the extending direction and facing the radial direction thereof, respectively. A chamfered portion 32 is formed on the outer side of the tip of each retaining protrusion 31, so that the insertability at the time of inserting the inserting portion 30 into the first mounting hole 2 or the second mounting hole 4 is enhanced. .. Further, as shown in FIG. 4, the protrusion height of each retaining protrusion 31 gradually increases from both sides in the width direction toward the center in the width direction on the base end side (opposite side of the chamfered portion 32). A pair of

inclined surfaces

33 and 34 are formed, and an intersecting portion of both

inclined surfaces

33 and 34 forms a top portion 35.

An elastic piece 40 that is flexible and deformable is provided on the outer circumference of the insertion portion 30 and extends toward the head 20 side from a predetermined position in the axial direction thereof. The elastic piece 40 of this embodiment is formed through a notch 38. As shown in FIG. 5, the notches 38 are formed in pairs on the base end side of the insertion portion 30 with respect to the pair of retaining

protrusions

31, 31. With reference to FIG. 7, the pair of

notches

38, 38 are formed parallel to each other so as to sandwich the axial center C and cross the insertion portion 30 when viewed from the axial direction of the insertion portion 30. ing. Each notch 38 communicates with a through hole 23 at a corresponding position provided in the head 20 (see FIG. 9).

Then, a pair of

elastic pieces

40, 40 that can be flexed and deformed are formed through the pair of

notches

38, 38. In this embodiment, the notch 38 is located inside each elastic piece 40 (the side of the insertion portion 30 facing the axis C) so that the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4. As shown in FIGS. 9, 12, and 14, each elastic piece 40 is inserted inward through the notch 38 (direction toward the axis C of the insertion portion 30) when the elastic piece 40 is inserted into the insert and then rotated. ) Can be bent and deformed.

Further, as shown in FIGS. 4, 5 and 7, each elastic piece 40 is provided so as to be radially aligned with each retaining protrusion 31 and on the axial base end side. That is, in this embodiment, the pair of

elastic pieces

40, 40 are provided in the radial direction with respect to the pair of retaining

protrusions

31, 31 and on the axial base end side. When there is one elastic piece and one retaining protrusion, one elastic piece is provided on the radial opposite side and the axial base end side with respect to the one retaining protrusion. .. Further, when there is one elastic piece and a pair of retaining protrusions, one elastic piece is radially aligned with one of the pair of retaining

protrusions

31, 31 and is axially proximal. Will be provided in.

Further, in the elastic piece 40, as shown in FIGS. 13 and 14, the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R, and the first member 1 and the first member 1 and the first member 40 are rotated. A first contact portion 45 that elastically contacts the inner circumference 2d of the first mounting hole 2 in a state where the two members 3 are fixed to each other (hereinafter, also referred to as “insertion portion rotation fixed state”), and the insertion portion rotation. In the fixed state, it has a second contact portion 49 that is pressed against the back peripheral edge of the second mounting hole 4.

The base end portion 43 of each elastic piece 40 in this embodiment is connected to a predetermined position on the outer circumference of the insertion portion 30, and extends toward the head 20 side with a constant width. Further, the first contact portion 45 is provided on the tip end side of each elastic piece 40 in the extending direction.

Further, the first contact portion 45 is provided on the tip end side of the elastic piece 40 in the extending direction so as to be wider than the base end side of the elastic piece 40, and extends from one end side in the member fixing direction R. It has an extended portion 47. Further, the outer surface 46 of the first contact portion 45 (the surface of the insertion portion 30 opposite to the surface facing the axis C) has a shape protruding in a tapered shape gradually increasing from the base end side toward the tip end side. (Here, it has a tapered shape including the extending portion 47). Further, the corner portion 47a, which is the tip of the extending portion 47 in the extending direction and is opposite to the head portion 20, is chamfered at a predetermined angle (see FIG. 4). The corner portion 47a makes it difficult for the extension portion 47 to be caught on the inner peripheral edge of the insertion portion 30 when the insertion portion 30 is inserted into the second mounting hole 4, and is used when the insertion portion 30 is rotated in the member fixing direction R. 1 Make it difficult to get caught in the inner circumference 2d of the mounting hole 2.

As shown in FIG. 14, the first contact portion 45 elastically contacts the inner circumference 2d of the first mounting hole 2 in the state where the insertion portion is rotated and fixed. Here, the highest protruding top portion 46a of the outer surface 46 of the first contact portion 45 elastically contacts the inner circumference 2d of the first mounting hole 2. At this time, as shown in FIG. 10, the angle of the tapered outer surface 46 of the first contact portion 45 with respect to the axial center C of the insertion portion 30 is set to θ1, and the angle with respect to the center C'of the first mounting hole 2 is set to θ1. When the angle formed by the inner circumference 2d of the first mounting hole 2 is θ2, θ1> θ2 (θ1 is an obtuse angle than θ2), so that the outer surface of the first contact portion 45 is as described above. The top portion 46a of the 46 comes into contact with the inner circumference 2d of the first mounting hole 2.

Further, as shown in FIG. 10, an extension forming the first contact portion 45 is formed before the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R. The portion 47 is configured to elastically abut the inner circumference 2d of the first mounting hole 2. Here, the top portion 46a of the extending portion 47 elastically contacts the inner circumference 2d of the first mounting hole 2.

Further, the second contact portion 49 pressed against the back peripheral edge of the second mounting hole 4 in the state where the insertion portion is rotated and fixed is the tip surface (facing the head 20) of the first contact portion 45 of each elastic piece 40. A surface to be formed), which comprises a protrusion protruding toward the head 20 from the other end side opposite to the member fixing direction R. In the second contact portion 49, the first contact portion 45 elastically contacts the inner circumference 2d of the first mounting hole 2 in the state where the insertion portion shown in FIGS. 13 and 14 is rotated and fixed. As the elastic piece 40 bends and deforms inward, it is pressed against the back peripheral edge of the second mounting hole 4. Further, as shown in FIG. 4, the second contact portion 49 is biased toward the side opposite to the member fixing direction R with respect to the top portions 35 of the pair of

inclined surfaces

33 and 34 on the base end side of the retaining protrusion 31. Is ranked. As shown in FIG. 4, the tip surface corner portion of the second contact portion 49 on the head 20 side has a rounded curved surface shape.

The second contact portion 49 composed of the protrusions has the second mounting hole 4 in a state before the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R. The second mounting hole, as shown in FIGS. 14 and 15, in a state where the first member 1 and the second member 3 are fixed to each other by rotating the insertion portion 30 in the member fixing direction R without biting into the inner circumference of the above. It is configured to bite into the inner circumference of 4. Here, the tip surface of the second contact portion 49 on the head 20 side bites into the inner circumference of the second mounting hole 4.

The shape of the head, the insertion portion, the retaining protrusion, the elastic piece, the first contact portion, the second contact portion, and the like constituting the fastener is not limited to the above shape. Further, in this embodiment, two retaining protrusions and two elastic pieces are provided, but one or three or more may be provided.

Further, in this member mounting structure, between the front side of the first member 1 and the back side of the second member 3, the retaining protrusion 31 is in a state before passing over the first mountain portion 5, and the retaining protrusion 31 is formed. A gap is provided in a state where the 31 is fitted in the fitting recess 7, and the gap is configured to be the narrowest when the retaining protrusion 31 gets over the first mountain portion 5.

Specifically, as shown in the partially enlarged view of FIG. 9, the front side and the second of the first member 1 in the state before the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated. The gap between the back sides of the members 3 is S1, and as shown in the partially enlarged view of FIG. 14, the gap between the front side of the first member 1 and the back side of the second member 3 in the state where the insertion portion is rotated and fixed is S2. Further, as shown in the partially enlarged view of FIG. 12, after inserting the insertion portion 30 into the first mounting hole 2 and the second mounting hole 4, the insertion portion 30 is rotated by a predetermined angle in the member fixing direction R to prevent the retaining protrusion. When the gap between the front side of the first member 1 and the back side of the second member 3 when 31 gets over the first mountain portion 5 is S3, the gap S3 is narrower than the gaps S1 and S2. It is configured in.

The material of the fastener 10 having the above structure can be formed of, for example, a polyamide resin such as nylon or a resin material such as polyacetal (POM) or polypropylene (PP). Further, the resin material may be formed of a fiber reinforced resin reinforced by containing glass fibers, carbon fibers, metal fibers and the like. Further, each part constituting the fastener 10, that is, the head 20, the insertion portion 30, the elastic piece 40, the first contact portion 45, the extension portion 47, the second contact portion 49, and the like are integrally formed. There is.

Next, the action and effect of the fastener 10 and the member mounting structure having the above configuration will be described.

First, as shown in FIG. 1, a pair of

groove portions

2b, 2c of the first mounting hole 2 of the first member 1, a pair of

groove portions

4b, 4c of the second mounting hole 4 of the second member 3, and a fastener 10 The insertion portion 30 of the fastener 10 is inserted from the front side of the second member 3 from the front end side thereof by aligning the pair of retaining

protrusions

31 and 31.

Then, the pair of retaining

protrusions

31, 31 pass through the pair of

groove portions

4b, 4c of the second mounting hole 4 and the pair of

groove portions

2b, 2c of the first mounting hole 2, and the first mounting hole 2 The insertion portion 30 is inserted into the second mounting hole 4 and the first mounting hole 2 while being pulled out from the back side of the above (see FIG. 8).

Further, as shown in FIG. 10, the top portion 46a of the extending portion 47 of the elastic piece 40 on the tip side in the extending direction elastically contacts the inner circumference 2d of the first mounting hole 2, and is shown in FIG. As described above, the pair of

elastic pieces

40, 40 flexes and deforms inward through the notch 38. At this time, the second contact portion 49 provided on the elastic piece 40 is located in the

groove portions

4b and 4c of the second mounting hole 4 and the

groove portions

2b and 2c of the first mounting hole 2, and is located in the second mounting hole 2. It does not bite into the inner circumference of the hole 4 and does not abut on the inner circumference of the first mounting hole 2.

Further, as shown in FIG. 8, one retaining protrusion 31 is arranged between the first ridge 5 and the second ridge 6 located on one side of the longitudinal direction L of the first mounting hole 2. The other retaining protrusion 31 is arranged between the second mountain portion 6 and the first mountain portion 5 located on the other side of the first mounting hole 2 in the longitudinal direction L. Further, in this state, as shown in the partially enlarged view of FIG. 9, a gap S1 is formed between the front side of the first member 1 and the back side of the second member 3.

In the above state, as shown in FIG. 11, the insertion portion 30 of the fastener 10 is rotated in the member fixing direction R via the head 20. Then, the pair of retaining

protrusions

31, 31 are pressed by the

outer surfaces

5a, 5a that are inclined so as to gradually increase the

first peaks

5, 5, so that the head 20 is moved to the front side of the second member 3. The fastener 10 is pushed up so as to be close to each other, the head 20 abuts on the front side of the second member 3, and the second member 3 is slightly lifted with respect to the first member 1 (see FIG. 12). ..

At the same time, while the elastic piece 40 is in sliding contact with the inner circumference 2d of the first mounting hole 2, the insertion portion 30 rotates, and the top portion 46a of the extending portion 47 of the elastic piece 40 on the extension direction proximal end side is formed. , The inner circumference 2d of the first mounting hole 2 is elastically contacted, and the state of bending and deforming inward is maintained. At this time, the second contact portion 49 does not bite into the inner circumference of the second mounting hole 4, and does not contact the inner circumference of the first mounting hole 2. Further, in this state, as described above, when the pair of retaining

protrusions

31 and 31 get over the

second ridges

6 and 6, the fastener 10 is pushed up and the second member is pushed up with respect to the first member 1. Since 3 is slightly lifted, the gap S3 between the front side of the first member 1 and the back side of the second member 3 is narrower than the gap S1 in FIG. 9, as shown in the partially enlarged view of FIG.

Then, when the fastener 10 is further rotated in the member fixing direction R, as shown in FIG. 13, the pair of retaining

protrusions

31 and 31 get over the tops of the

first ridges

5 and 5 and fit recesses. By fitting to 7 and 7 and locating on the inner surface side of the

second ridges

6 and 6, the rotation of the insertion portion 30 is restricted. Further, while the elastic piece 40 is in sliding contact with the inner circumference 2d of the first mounting hole 2, the insertion portion 30 further rotates, and the first contact portion 45 is located at a position beyond the base end side of the extension portion 47. The top portion 46a elastically contacts the inner circumference 2d of the first mounting hole 2 and is maintained in a state of being flexed and deformed inward, and as shown in FIGS. 14 and 15, the second contact portion 49 Bites into the inner circumference of the second mounting hole 4, and the second contact portion 49 is pressed against the back peripheral edge of the second mounting hole 4.

As a result, as shown in FIG. 14, the first member 1 is formed by the pair of retaining

protrusions

31 and 31 and the first contact portion 45 that elastically contacts the inner circumference 2d of the first mounting hole 2. The second member 3 is sandwiched by the head 20 and the second contact portion 49 pressed against the back peripheral edge of the second mounting hole 4.

That is, in the fastener 10, as shown in FIG. 14, a pair of

elastic pieces

40, 40 are arranged between the pair of retaining

protrusions

31, 31 and the head 20, and each elastic piece is arranged. The first contact portion 45 and the second contact portion 49 provided on the 40 have an action of abutting on the inner circumference 2d of the first mounting hole 2 or being pressed against the back peripheral edge of the second mounting hole 4. The first member 1 and the second member 3 are sandwiched between the retaining protrusion 31 and the head 20 via the elastic piece 40, and the first member 1 and the second member 3 are fixed to each other. It will be.

Further, the fastener 10 pushed up when the pair of retaining

protrusions

31 and 31 get over the

first peaks

5 and 5, and the pair of retaining

protrusions

31 and 31 are fitted into the

fitting recesses

7 and 7. As a result, as shown in the partially enlarged view of FIG. 14, the gap S2 between the front side of the first member 1 and the back side of the second member 3 becomes wider than the gap S3 in FIG.

Then, in the fastener 10, as described above, when the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R, as shown in FIG. The first member is formed by a pair of retaining

protrusions

31 and 31 that engage with the back peripheral edge of the first mounting hole 2 and a first contact portion 45 that elastically contacts the inner circumference 2d of the first mounting hole 2. The second member 3 is sandwiched between the head portion 20 that comes into contact with the front side of the second member 3 and the second contact portion 49 that is pressed against the back peripheral edge of the second mounting hole 4. The first member 1 and the second member 3 can be fixed to each other. That is, the first member 1 and the second member 3 can be attached via the fastener 10.

At this time, since the first contact portion 45 provided on the elastic piece 40 elastically contacts the inner circumference 2d of the first mounting hole 2, rattling and misalignment of the fastener 10 can be suppressed. The second contact portion 49 provided on each elastic piece 40 is pressed against the back peripheral edge of the second mounting hole 4, and the second member 3 is sandwiched between the elastic piece 40 and the head 20 with a high holding force. The second member 3 can be fixed to the one member 1 with less rattling.

The fastener itself is made of resin, and the first contact portion 45 and the second contact portion 49 provided on each elastic piece 40 exert the above-mentioned actions. The metal clip in the member mounting structure of 1 can be eliminated, the number of parts can be reduced, and the cost can be reduced.

When it is desired to remove the second member 3 from the first member 1, the insertion portion 30 is rotated in the direction opposite to the member fixing direction R from the fixed mounting state of both

members

1 and 3 shown in FIG. Then, the pair of retaining

protrusions

31, 31 move on the

outer surfaces

5a, 5a of the

first mountain portions

5, 5, and as shown in FIG. 8, the first mounting hole 2 on one side in the longitudinal direction. One retaining protrusion 31 is arranged between the 1st ridge 5 and the 2nd ridge 6, and the 2nd ridge 6 and the 1st ridge 5 on the other side in the longitudinal direction of the 1st mounting hole 2 are arranged. The other retaining protrusion 31 is arranged between them, and the pair of retaining

protrusions

31, 31 are positioned so as to match the pair of

groove portions

2b, 2c of the first mounting hole 2, so that the first mounting hole is formed. The insertion portion 30 can be pulled out from 2, and the second member 3 can be removed from the first member 1.

Further, in the fastener 10 of this embodiment, the first contact portion 45 is provided on the tip end side of the elastic piece 40 in the extending direction so as to be wider than the base end side of the elastic piece 40, and is a member. It has an extending portion 47 extending from one end side of the fixing direction R, and is in a state before the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R. As shown in FIG. 10, the extending portion 47 is configured to elastically abut the inner circumference 2d of the first mounting hole 2.

In this way, in the state before the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated, the wide extending portion 47 provided in the first contact portion 45 is the first mounting hole. Since it elastically contacts the inner circumference 2d of 2, when the insertion portion 30 is subsequently rotated in the member fixing direction R, the first contact portion 45 is placed in the first mounting hole 2 via the extension portion 47. The elastic piece 40 can be easily flexed and deformed by smoothly contacting the inner circumference 2d of the above, and the second contact portion 49 can be easily pressed against the back peripheral edge of the second mounting hole 4. As a result, the fixing workability of both

members

1 and 3 by the fastener 10 can be improved.

Further, in the fastener 10 of this embodiment, the second contact portion 49 is composed of a protruding portion of the elastic piece 40 protruding from the other end side opposite to the member fixing direction R toward the head 20. The second contact portion 49 composed of the protrusions rotates the insertion portion 30 in the member fixing direction R, and the first member 1 and the second member 3 are fixed to each other, and the inner circumference of the second mounting hole 4 is fixed. It is configured to bite into.

According to this aspect, in the state before the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R, the second contact portion 49 is inside the second mounting hole 4. The insertion portion 30 is rotated in the member fixing direction R without biting into the circumference (see FIG. 9), and the first member 1 and the second member 3 are fixed to each other so as to bite into the inner circumference of the second mounting hole 4. Since it is configured, the second contact portion 49 can be easily bitten into the inner circumference of the second mounting hole 4 (at the beginning of inserting the insertion portion 30 into both mounting

holes

2 and 4, the second contact portion). Since 49 does not bite into the inner circumference of the second mounting hole 4, there is an idle section until the second contact portion 49 bites, which makes it easier to bite the second contact portion 49), and both members 1 by the fastener 10. The fixing workability of, and 3 can be further improved. Further, since the second contact portion 49 bites into the inner circumference of the second mounting hole 4, the second member 3 can be more firmly sandwiched by the second contact portion 49 formed of the protrusion and the head 20. The second member 3 can be fixed to the first member 1 with less rattling.

Further, in this member mounting structure, the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 on the back peripheral edge of the first mounting hole 2 and rotated in the member fixing direction R to prevent the member from coming off. The first mountain portion 5 over which the protrusion 31 can be overcome, the second mountain portion 6 which is in contact with the retaining protrusion 31 and serves as a rotation stopper for the insertion portion 30, the first mountain portion 5 and the second mountain portion 6 The first member 1 is made of resin, and the first member 1 is made of resin, and the first mountain portion 5, the second mountain portion 6, and the fitting recess 7 are provided between the two. The recess 7 is integrally formed with the first member 1.

According to the member mounting structure, when the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R, the retaining protrusion 31 gets over the first mountain portion 5 and As shown in FIG. 13, since the fitting recess 7 is fitted, the first member 1 and the second member are fitted through the fastener 10 in a state where the rotation of the insertion portion 30 is restricted by the second mountain portion 6. 3 can be fixed to each other. Further, since the first member 1 is made of resin in addition to the fastener 10, the cost of the member mounting structure can be reduced.

Further, in the member mounting structure of this embodiment, between the front side of the first member 1 and the back side of the second member 3, the retaining protrusion 31 is in a state before passing over the first mountain portion 5 and is removed. A gap is provided in a state where the stop protrusion 31 is fitted in the fitting recess 7, and this gap is configured to be the narrowest when the retaining protrusion 31 gets over the first mountain portion 5. There is. That is, the gap S1 between the front side of the first member 1 and the back side of the second member 3 before the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated (see FIG. 9). The insertion portion 30 is inserted into the first mounting holes 2 and the second with respect to the gap S2 (see FIG. 14) between the front side of the first member 1 and the back side of the second member 3 in the state where the insertion portion is rotated and fixed. After being inserted into the mounting hole 4, it is rotated by a predetermined angle in the member fixing direction R, and between the front side of the first member 1 and the back side of the second member 3 when the retaining protrusion 31 gets over the first mountain portion 5. The gap S3 is narrowed.

When the retaining protrusion 31 gets over the first mountain portion 5, a pushing force of the insertion portion 30 in the insertion direction F acts on the fastener 10. At this time, in this embodiment, the elastic piece 40 which has the above-mentioned gap S1 (however, S2 when the fixing is released) and which is in contact with the inner circumference 2d of the first mounting hole 2 is directed inward. Since it is bent, the fastener 10 is pushed up in the insertion direction F, and the second member 3 is slightly lifted with respect to the first member 1 so as to narrow the gap S1 (however, S2 when the fixing is released). It is possible to reduce the scraping of the first ridge portion 5 and the retaining protrusion 31 when the insertion portion 30 is rotated in the member fixing direction R. Further, this effect can be similarly obtained when the fastener 10 is rotated in the direction opposite to the member fixing direction R (when the fixing is released).

16 to 26 show another embodiment of the fastener according to the present invention and the member mounting structure using the fastener. The same parts as those of the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIGS. 16 to 19, the fastener 10A of this embodiment is a member in which the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 at least on the outer surface 46 of the first contact portion 45. A contact rib 60 that comes into contact with the inner circumference 2d of the first mounting hole 2 when rotated in the fixing direction R is provided so as to project.

Further, as shown in FIG. 24, the second contact portion 50 does not press the back peripheral edge of the second mounting hole 4 in a state where the contact rib 60 is in contact with the inner circumference 2d of the first mounting hole 2. , The elastic piece 40 is configured to bend and deform.

As shown in FIGS. 17 and 19, the second contact portion 50 has a contact portion that contacts the back peripheral edge of the second mounting hole 4. The second contact portion 50 in this embodiment is the tip surface of the first contact portion 45 of each elastic piece 40, and is the member fixing direction R, similarly to the second contact portion 49 in the embodiment. It is composed of a protrusion protruding toward the head 20 from the opposite end side. The second contact portion 50 may have a contact portion that abuts on the back peripheral edge of the second mounting hole 4, even if it is not a protrusion that protrudes toward the head 20 as described above. .. Further, as shown in FIG. 17, when the fastener 10A is viewed from the front, the tip surface 51 (the surface facing the head 20) of the second contact portion 50 is directed toward the axis C of the fastener 10A. It has a tapered surface shape in which the amount of protrusion gradually increases.

On the other hand, as shown in FIG. 19, when viewed from the axial direction of the insertion portion 30, the contact rib 60 abuts on the back peripheral edge of the second mounting hole 4 of the second contact portion 50. Hereinafter, it is arranged on the member fixing direction R side rather than simply referred to as "contact portion").

Further, as shown in FIG. 18, the contact rib 60 has a base end located on the extension direction tip side of the base end portion 43 of the elastic piece 40 when the fastener 10A is viewed from the side. 1 It extends so as to project diagonally outward along the outer surface 46 of the contact portion 45, and its tip extends with a length extending to the base end side of the second contact portion 50, and is shown in FIG. When the fastener 10A is viewed from the front, a ridge extending continuously along the axis C of the fastener 10A is formed.

Further, as shown in FIG. 17, when the fastener 10A is viewed from the front, the contact rib 60 has a constant width with the axis C of the fastener 10A as a boundary, and the elastic piece 40 has an elastic piece 40. It extends from the base end portion 43 side, passes through the first contact portion 45, and reaches the base end side of the second contact portion 50. Both

side edge portions

60a and 60a (see FIG. 17) along the extending direction of the contact rib 60 have an R shape.

In the fastener 10A having the above configuration, as shown in FIG. 21, in the state before the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated, the inside of the first mounting hole 2 The contact rib 60 does not abut on the circumference 2d, and the elastic piece 40 does not bend (see FIG. 22). Then, as shown in FIG. 23, when the fastener 10A is rotated in the member fixing direction R from this state, the contact rib 60 comes into contact with the inner circumference 2d of the first mounting hole 2 as shown in FIG. 24. The contact rib 60 is pressed by the inner circumference 2d of the first mounting hole 2, and the elastic piece 40 provided with the contact rib 60 is inward of the insertion portion 30 (direction approaching the axis C of the insertion portion 30). ) Bends and deforms. At this time, as shown in FIG. 24, the contact portion of the second contact portion 50 floats from the back peripheral edge of the second mounting hole 4 so as not to press the back peripheral edge of the second mounting hole 4. , A gap is formed between the contact portion of the second contact portion 50 and the back peripheral edge of the second mounting hole 4, and the second contact portion 50 does not bite into the back peripheral edge of the second mounting hole 4). , The elastic piece 40 is configured to bend and deform.

Further, in the fastener 10A, the portion where the first contact portion 45 of the elastic piece 40 is located is located outward by the amount of the contact rib 60 provided, as compared with the case where the contact rib 60 does not exist. Since it overhangs, it is more likely to be pressed by the inner circumference 2d of the first mounting hole 2 as compared with the configuration in which the contact rib 60 does not exist, and the amount of bending deformation of the elastic piece 40 becomes large.

The abutting ribs may be, for example, a ridge extending at an angle with respect to the axial center C of the insertion portion 30, a ridge wider than the width of the abutting rib 60 shown in FIG. 17, or a plurality of ridges. It may be a ridge extending in parallel, and is not particularly limited.

On the other hand, in the member mounting structure of this embodiment, the contact rib 60 is fitted into the inner circumference 2d of the first mounting hole 2 when the retaining protrusion 31 is fitted into the fitting recess 7 (see FIG. 25). A mating fitting groove 9 is formed (see FIGS. 16 and 20).

Further, in a state where the contact rib 60 is in contact with the inner circumference 2d of the first mounting hole 2, the elastic piece 40 is bent and deformed so that the second contact portion 60 does not press the back peripheral edge of the second mounting hole 4. (See FIG. 24) And, with the contact rib 60 fitted in the fitting groove 9, the elastic piece 40 is elastic so that the second contact portion 60 presses the back peripheral edge of the second mounting hole 4. It is configured to return (see FIG. 26).

In this embodiment, as shown in FIG. 20, when the first member 1 is viewed from the bottom surface side, it passes through the center C'of the first mounting hole 2 and is the circumference of the inner circumference 2d of the first mounting hole 2. A pair of

fitting grooves

9 and 9 are formed at locations facing each other in the direction. Each fitting groove 9 is a concave groove whose inner circumference is curved. Further, as shown in FIG. 20, each fitting groove 9 is formed so that the bottom surface thereof is deeper than the inner circumference 2d of the first mounting hole 2 (that is, the bottom surface of the fitting groove 9). Is formed so as to be separated from the center C'of the first mounting hole 2 rather than the inner circumference 2d of the first mounting hole 2). Further, as shown in FIG. 16, the fitting groove 9 has a tapered inner circumference 2d from one end (the front end of the first member 1) to the other end (the end on the front side of the central hole 2a). It is formed in the range up to.

In the member mounting structure having the above configuration, the fastener 10A is inserted as shown in FIG. 23 from the state where the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 (see FIGS. 21 and 22). When rotated in the member fixing direction R, the contact rib 60 comes into contact with the inner circumference 2d of the first mounting hole 2, and the contact rib 60 is pressed against the inner circumference 2d of the first mounting hole 2 to make a second contact. The elastic piece 40 bends and deforms inward of the insertion portion 30 so that the portion 50 does not press the back peripheral edge of the second mounting hole 4 (see FIG. 24). Then, when the fastener 10A is further rotated in the member fixing direction R as shown in FIG. 25 from the state shown in FIGS. 23 and 24, the contact rib 60 is in contact with the inner circumference 2d of the first mounting hole 2. When the insertion portion 30 rotates and the contact rib 60 reaches the fitting groove 9, the contact rib 60 enters the fitting groove 9 and fits (depresses and fits). Then, the contact rib 60 of the elastic piece 40 is not pressed by the inner circumference 2d of the first mounting hole 2, and the pressed state is released. Therefore, the elastic piece 40 elastically returns to the outside of the insertion portion 30. Transforms towards. At this time, the second contact portion 60 presses on the back side peripheral edge of the second mounting hole 4 (that is, the second contact portion 60 abuts on the back side peripheral edge of the second mounting hole 4 and bites into it). The elastic piece 40 is configured to elastically return (see FIG. 26).

Next, the action and effect of the fastener 10A having the above configuration and the member mounting structure will be described.

That is, in the fastener 10A of this embodiment, the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 at least on the outer surface 46 of the first contact portion 45 and rotated in the member fixing direction R. At that time, a contact rib 60 that comes into contact with the inner circumference 2d of the first mounting hole 2 is provided so as to project.

Therefore, as shown in FIGS. 21 and 22, when the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R (see FIG. 23), the contact rib 60 abuts on the inner circumference 2d of the first mounting hole 2, the contact rib 60 is pressed by the inner circumference 2d of the first mounting hole, and the elastic piece 40 bends and deforms toward the inside of the insertion portion 30. Therefore (see FIG. 24), the elastic piece 40 can be easily bent and deformed as compared with the case where the contact rib 60 does not exist. At this time, the elastic piece 40 bends and deforms while floating from the back peripheral edge of the second mounting hole 4 so that the second contact portion 50 does not press the back peripheral edge of the second mounting hole 4 (see FIG. 24). ), It is possible to prevent the second contact portion 50 from pressing the backside peripheral edge of the second mounting hole 4, and the fastener 10A can be smoothly rotated. By the way, burrs may occur on the back peripheral edge of the second mounting hole 4, but as described above, even if the second contact portion 50 has such burrs, the second contact portion 50 is the second. 2 Since the elastic piece 40 bends and deforms so as to float from the back peripheral edge of the mounting hole 4, the second contact portion 50 bites into the burr and the rotation of the fastener 10A is hindered. Can be prevented.

Further, since the second contact portion 50 is prevented from pressing the back side peripheral edge of the second mounting hole 4 when the fastener 10A is rotated, the second contact portion 50 is scraped (for example, the second mounting hole). If there is a burr on the back side peripheral edge of 4, the second contact portion 50 can be scraped by the burr), and the fastener 10A can be easily reused.

Further, in this embodiment, as shown in FIG. 19, when viewed from the axial direction of the insertion portion 30, the contact rib 60 is closer to the member fixing direction R side than the contact portion of the second contact portion 50. Is located in.

Therefore, as shown in FIGS. 21 and 22, when the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4 and rotated in the member fixing direction R, the second contact portion 50 is hit. Before the contact portion presses the back peripheral edge of the second mounting hole 4, the contact rib 60 contacts the inner circumference 2d of the first mounting hole 2, that is, the contact portion of the second contact portion 50 is the second. Before abutting the edge portion 4d (see FIG. 16) of the mounting hole 4, the abutting rib 60 abuts on the inner circumference of the first mounting hole 2, the elastic piece 40 bends and deforms, and the second abutting portion 50 Since the abutting portion of the second abutting portion is in a state of floating from the back side peripheral edge of the second mounting hole 4, it is possible to more reliably prevent the second abutting portion 50 from pressing the back side peripheral edge of the second mounting hole 4. ..

On the other hand, in the member mounting structure of this embodiment, as shown in FIGS. 21 and 22, the insertion portion 30 is inserted into the first mounting hole 2 and the second mounting hole 4, and then rotated in the member fixing direction R. When the retaining protrusion 31 is fitted into the fitting recess 7 (see FIG. 25), the contact rib 60 enters the fitting groove 9 and is fitted as shown in FIG. 26, so that a sense of moderation (click) is obtained. It is possible to give a feeling), and it is possible to clearly grasp that the fixing work of the first member 1 and the second member 3 has been completed.

Further, when the retaining protrusion 31 is fitted into the fitting recess 7, the contact rib 60 is fitted into the fitting groove 9, so that the rotation of the fastener 10A is restricted with respect to the first member 1. be able to.

Further, the elastic piece 40 is bent so that the second contact portion 50 does not abut on the back peripheral edge of the second mounting hole 4 in a state where the contact rib 60 is in contact with the inner circumference 2d of the first mounting hole 2. The elastic piece 40 is deformed (see FIG. 24) and the second contact portion 50 presses the back peripheral edge of the second mounting hole 4 in a state where the contact rib 60 is fitted in the fitting groove 9. Is configured to elastically return (see FIG. 26). Therefore, the fastener 10A can be smoothly rotated when the contact rib 60 is not fitted in the fitting groove 9, while the second hit is when the contact rib 60 is fitted in the fitting groove 9. Since the contact portion 50 is firmly pressed against the back peripheral edge of the second mounting hole 4 to bite into the contact portion 50, the second member 3 is firmly sandwiched between the second contact portion 50 and the head portion 20, and the second member 3 is firmly sandwiched. The second member 3 can be fixed to the one member 1 with less rattling.

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. ..

1 1st member 2 1st mounting hole 3 2nd member 4 2nd mounting hole 5 1st mountain part 6 2nd mountain part 7 Fitting recess 9

Fitting groove

10, 10A Fastener 20 Head 30 Insertion part 31 Retaining Protrusion 40 Elastic piece 43 Base end 45 First contact 47

Extension

49, 50 Second contact 60 Contact rib

Claims

The first member and the second member are fixed to each other by inserting them into the first mounting hole formed in the first member and the second mounting hole formed in the second member and rotating the first member and the second member in a predetermined member fixing direction. It is a resin fastener
The head that comes into contact with the front side of the second member,
An insertion portion extending from the back side of the head and being inserted into the first mounting hole and the second mounting hole.
It is provided on the tip end side of the insertion portion, and when the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction, it engages with the back peripheral edge of the first mounting hole. With the retaining protrusion,
It has an elastic piece that is the outer circumference of the insertion portion and is flexible and deformable and extends from a predetermined position in the axial direction toward the head side.
The elastic piece is provided on the side opposite to the retaining protrusion in the radial direction and on the axial proximal end side, or is radially aligned with the retaining protrusion and axially proximal. It is provided in
In the elastic piece, the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction, and the first member and the second member are fixed to each other. 1 It has a first contact portion that elastically contacts the inner circumference of the mounting hole and a second contact portion that is pressed against the back peripheral edge of the second mounting hole in the fixed state. Characteristic fasteners.
The first contact portion is provided on the tip end side of the elastic piece in the extending direction so as to be wider than the base end side of the elastic piece, and extends from one end side in the member fixing direction. Has a part
Before the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction, the extending portion elastically contacts the inner circumference of the first mounting hole. The fastener according to claim 1, which is configured as follows.
The second contact portion comprises a protrusion of the elastic piece that protrudes toward the head from the other end side opposite to the member fixing direction.
In the second contact portion formed of the protrusion, the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction, and the first member and the second member are brought into each other. The fastener according to claim 1 or 2, which is configured to bite into the inner circumference of the second mounting hole in a fixed state.
When the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction at least on the outer surface of the first contact portion, it hits the inner circumference of the first mounting hole. The contact ribs that come into contact are projected,
The elastic piece is bent and deformed so that the second contact portion does not press the back edge of the second mounting hole in a state where the contact rib is in contact with the inner circumference of the first mounting hole. The fastener according to any one of claims 1 to 3, which is configured.
The second contact portion has a contact portion that abuts on the back peripheral edge of the second mounting hole.
The fastener according to any one of claims 1 to 4, wherein the contact rib is arranged on the member fixing direction side with respect to the contact portion of the second contact portion.
A member mounting structure for fixing the first member and the second member to each other by using the fastener according to any one of claims 1 to 5.
On the back peripheral edge of the first mounting hole, when the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction, the retaining protrusion can be overcome. The retaining protrusion is provided between the first peak and the second peak, which is a contact between the one peak and the retaining protrusion and serves as a rotation stopper for the insertion portion. It has a fitting recess to which the part fits,
The member mounting structure is characterized in that the first member is made of resin, and the first mountain portion, the second mountain portion, and the fitting recess are integrally formed with the first member.
Between the front side of the first member and the back side of the second member, the state before the retaining protrusion exceeds the first peak, and the retaining protrusion fits into the fitting recess. The member mounting structure according to claim 6, wherein a gap is provided in this state, and the gap is configured to be the narrowest when the retaining protrusion gets over the first mountain portion.
When the insertion portion is inserted into the first mounting hole and the second mounting hole and rotated in the member fixing direction at least on the outer surface of the first contact portion, it hits the inner circumference of the first mounting hole. The contact ribs that come into contact are projected,
A fitting groove is formed in the inner circumference of the first mounting hole to fit the contact rib when the retaining protrusion is fitted into the fitting recess.
In a state where the contact rib is in contact with the inner circumference of the first mounting hole, the elastic piece is bent and deformed so that the second contact portion does not press the back edge of the second mounting hole, and the elastic piece is deformed and deformed. The member mounting structure according to claim 6 or 7, wherein the second contact portion presses the back peripheral edge of the second mounting hole in a state where the contact rib is fitted in the fitting groove. ..