JP7280813B2 - Fastener - Google Patents

Description

The present invention relates to fasteners mounted in mounting holes.

For example, a vehicle body panel or the like has a mounting hole formed therein, and a trim board or the like is mounted to the vehicle body panel or the like through a fastener that is inserted into and fixed to the mounting hole.

As a conventional clip of this type, Patent Document 1 below discloses that a clip body includes an anchor portion and a plate portion projecting outward integrally from the base side of the anchor portion, and the anchor portion is attached to a mating member. A resin clip is described in which the clip body is attached to the mating member by being inserted into the hole, and the plate portion is pressed against the surface of the mating member to seal the periphery of the mounting hole.

Moreover, the anchor part has a support|pillar which has the shape of a planar "X" shape which protruded from the center of the back side of the dish part. The strut comprises a pair of plate-shaped pieces extending parallel to each other, a pair of plate-shaped pieces orthogonal to the pair of plate-shaped pieces, connecting the pair of plate-shaped pieces, and a predetermined length from the center of the outer surface of each plate-shaped piece. It consists of a protruding connecting piece. In addition, flexible pieces are arranged at the four corners of the "X"-shaped column. That is, a pair of flexible pieces are arranged on both sides of the outer surfaces of the pair of plate-like pieces, respectively, and between the pair of flexible pieces, both sides of a short protruding connecting piece are arranged. In addition, an engaging shoulder is formed on the outer surface side of the proximal end of the flexible piece to be engaged with the rear peripheral edge of the mounting hole.

Japanese Unexamined Patent Application Publication No. 2011-52810

In the resin clip of Patent Document 1, as described above, both sides of the connecting piece protruding short are arranged between the pair of flexible pieces arranged on the outer surface side of the pair of plate-shaped pieces. Since it is necessary to consider the presence of this connecting piece, the shape of the flexible piece is limited, and it is sometimes difficult to increase the engaging force with respect to the mounting hole.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a fastener that can increase the force of engagement with a mounting hole.

In order to achieve the above object, the present invention provides a fastener to be attached to an attachment hole, comprising a head part that abuts on the front side of the attachment hole, and a leg part that is inserted into the attachment hole and engaged with the back side of the attachment hole. and the leg portion has a shaft portion and an elastic engaging piece that is flexurally deformable and has an engaging portion that engages with the rear peripheral edge of the mounting hole. The shaft portion has a plurality of plate-like portions extending in parallel from the back side of the head portion in the axial direction, and the elastic engaging piece is connected to the tip portion of the shaft portion. In addition, when the leg is viewed from the axial direction, one pair is arranged on each of both sides of the plurality of plate-shaped portions, and each pair is arranged on each side of the plurality of plate-shaped portions. It is characterized in that only a gap exists between the pair of elastic engagement pieces arranged.

According to the present invention, only a gap exists between the pair of elastic engaging pieces arranged on each side of the plurality of plate-shaped portions. Since the degree of freedom of the shape of can be increased, the engaging force with respect to the mounting hole can be increased.

1 is a perspective view of one embodiment of a fastener according to the present invention; FIG. It is an expansion perspective view of the same 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. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1; FIG. 2 is a cross-sectional view taken along line BB in FIG. 1; FIG. 4 is a cross-sectional view along the DD arrow line in FIG. 3; It is sectional drawing of the state before mounting|wearing an attachment seat with the same fastener, and attaching a fastener to an attachment hole. It is sectional drawing of the state which attached the attachment member to the to-be-attached member via the same fastener. FIG. 11 is a cross-sectional view when viewed from a direction different from that of FIG. 10; FIG. 11 is a cross-sectional view of a state in which the attachment member is attached to the attachment member via the fastener when the attachment member is thicker than that in FIG. 10 ; FIG. 13 is a cross-sectional view when viewed from a direction different from that of FIG. 12; Fig. 10 shows another embodiment of a fastener according to the invention and is a front view thereof; It is sectional drawing of the state which attached the attachment member to the to-be-attached member via the same fastener. FIG. 16 is a cross-sectional view of a state in which the attachment member is attached to the attachment member via the fastener when the attachment member is thicker than that in FIG. 15 ; FIG. 16 is a cross-sectional view along the EE arrow line in FIG. 15; Fig. 3 shows yet another embodiment of a fastener according to the present invention and is an enlarged perspective view thereof; FIG. 19 is a cross-sectional view along the II arrow line in FIG. 18;

An embodiment of a fastener according to the present invention will be described below with reference to FIGS. 1 to 13. FIG.

The fastener is inserted into a mounting hole formed in a predetermined member and fixed. As shown in FIGS. 1 and 10, the fastener 10 in this embodiment is engaged with, for example, a mounting seat 7 formed on the mounting member 5 and a circular mounting hole formed on the member 1 to be mounted. It is designed to be inserted into the hole 3 and fixed, and is used to attach the attachment member 5 to the member 1 to be attached.

Examples of the mounting member 1 include a vehicle body panel and a vehicle body frame, and examples of the mounting member 5 include a trim board, a cover, a garnish, an assist grip, a bumper, a lamp, an insulator (soundproof material), and the like. Examples include, but are not limited to. The mounting seat 7 of the mounting member 5 has a frame-like shape with one side (receiving side of the fastener 10) opened and a locking groove 8 formed on the bottom surface. head 20 can be held. However, for example, a circular insertion hole may be provided in the mounting member 5 and the head 20 of the fastener 10 may be engaged with the front side of the hole, and there is no particular limitation. In addition, the fastener may be used not only for the above purposes but also for closing the mounting hole (so-called hole plug), and is not particularly limited.

In the present invention, the "front side of the mounting hole" means one side in the thickness direction of the member to be mounted in which the mounting hole is formed and the side on which the head of the fastener is arranged. , When another member is placed on the member to be attached, it means one side in the thickness direction of this other member, and the head is on the front side of the mounting hole through the other member. It also includes cases where it is placed indirectly through In addition, the “back side of the mounting hole” in the present invention means the other side in the thickness direction of the member to be mounted in which the mounting hole is formed, and is the side opposite to the side on which the head of the fastener is arranged. ing.

As shown in FIGS. 1 and 2, the fastener 10 has a head portion 20 that abuts on the front side of the mounting hole 3 and a leg portion 30 that is inserted into the mounting hole 3 and engaged with the rear side. have.

In FIG. 1, the insertion direction of the leg portion 30 into the mounting hole 3 is indicated by the symbol "F". The "back side" in the connection part, the second connection part, etc.) means the side facing the insertion direction F of the leg part 30 into the mounting hole 3, and the "front side" in each part of the fastener The direction of insertion F means the opposite side.

First, the head portion 20 will be described. A plate-shaped first flange portion 23, a thin disk-shaped second flange portion 25 extending from the outer periphery of the neck portion 21 at a predetermined position in the axial direction, and connected to the back surface side of the second flange portion 25. A third flange portion 27 whose outer circumference spreads obliquely outward in a skirt shape toward the leg portion 30 side.

Then, by inserting the neck portion 21 of the head portion 20 into the locking groove 8 of the mounting seat 7 and sandwiching the mounting seat 7 between the first flange portion 23 and the second flange portion 25, the fastener 10 is attached to the mounting seat 7. is mounted (see FIG. 9). The structure of the head is not limited to the above-described mode, and may be any shape that engages with the front peripheral edge of the mounting hole formed in the predetermined member.

On the other hand, as shown in FIGS. 1 to 4, the leg portion 30 is elastically engaged with the shaft portion 40 and is provided with an engaging portion 55 that engages with the rear peripheral edge of the mounting hole 3 . It has a piece 50. Moreover, the shaft portion 40 has a plurality of plate-like portions 41 extending in parallel from the back side of the head portion 20 in the axial direction.

The shaft portions 40 in this embodiment are arranged in parallel to each other in the axial direction (the axis of the leg portion 30) with a predetermined gap S1 from the center portion on the back side of the third flange portion 27 constituting the head portion 20. It has a pair of plate-like portions 41, 41 extending along the direction C). Each plate-like portion 41 has a predetermined thickness (here, a constant thickness) and has a substantially elongated plate-like shape extending long in the axial direction of the leg portion 30, and its axial base end 43 is the head portion. 20, and axial ends 44 are connected to each other via block-shaped ends 45. As shown in FIG. Note that three or more plate-shaped portions may be arranged.

Further, as shown in FIG. 8, when the leg portion 30 is viewed from the axial direction (here, when the leg portion 30 is viewed in a cross section orthogonal to the axial direction), each plate-shaped portion paired with the plate-shaped portion 41 , 41 have inner surfaces 41a, 41a (surfaces facing each other, one side surface in the thickness direction and facing the axis C of the leg portion 30) are parallel to each other, and outer surfaces 41b, 41b (the inner surface 41a is different from the inner surface 41a). The surface on the opposite side, which is the other side surface in the thickness direction and the surface on the side opposite to the axis C of the leg portion 30) is also formed parallel to each other.

As shown in FIG. 3, when the leg portion 30 is viewed from the outside in the radial direction, the space S1 extends from the tip side of the plate-like portion 41 in the axial direction to the proximal end thereof, except for the first connecting portion 60, which will be described later. It is formed with a constant width up to the side.

Further, as shown in FIG. 6, the width direction side outer surface 41c of the plate-like portion 41 (the side surface in the direction orthogonal to the axial direction of the leg portion 30, or the parallel direction H of the plurality of plate-like portions 41 ( 8) is formed with a constant width on the side of the proximal end 43 in the axial direction, and is formed so that the width gradually narrows toward the side of the distal end 44 in the axial direction. there is

As shown in FIGS. 2-7, the tip 45 has a substantially conical block shape with a rounded tip 46 . More specifically, the distal end portion 45 has a curved front end 46 and a first tapered surface 47 that gradually increases in diameter toward the head portion 20 . A second tapered surface 48 having a reverse tapered shape whose diameter gradually decreases toward the head portion 20 is provided on the outer peripheral edge of the distal end portion 45 on the proximal end side. As shown in FIGS. 6 and 7, in this embodiment, the second tapered surface 48 is formed from the top portion 47a of the first tapered surface 47, which has the widest diameter. Further, as shown in FIG. 2, the outer surface 41c of the plate-like portion 41 on the side of the tip 44 is a continuous surface (surface) with no cuts or recesses with respect to the outer peripheral surface of the first tapered surface 47 of the tip 45. one shape).

As for the block-shaped distal end, the outer peripheral surface from the distal end to the outer peripheral edge on the base end side has notches, dents, etc., so that the leg does not get caught in the inner periphery of the mounting hole when the leg is inserted into the mounting hole. It is preferably a continuous surface free from irregularities (it may contain minute irregularities that are inevitable in molding). Moreover, the shape of the tip portion may be, for example, a hemispherical shape, and is not limited to the above shape. However, from the viewpoint of maintaining the rigidity of the shaft, the distal end preferably has a shape that allows the distal ends of the plurality of plate-shaped portions to be connected to each other.

In addition, the elastic engaging piece 50 is connected to the tip portion 45 of the shaft portion 40 and, when the leg portion 30 is viewed from the axial direction, is provided on each of both side portions of the plurality of plate-like portions 41 sandwiched therebetween. They are arranged in pairs.

In addition, as shown in FIG. 8, the both side portions of the plurality of plate-like portions 41 here mean one side portion of the plurality of plate-like portions 41 in the parallel direction H (among the plurality of plate-like portions, the parallel direction H). the outside of the plate-shaped portion arranged at one end), and the other side portion of the plurality of plate-shaped portions in the parallel direction H (among the plurality of plate-shaped portions, the plate-shaped portion arranged at the other end of the parallel direction H outside).

In this embodiment, as shown in FIG. 8, a pair of elastic engaging pieces 50, 50 are attached to the outer surface 41b of one of the pair of plate-like portions 41, 41 with a predetermined gap S2 therebetween. 50 are arranged, and a pair of elastic engaging pieces 50, 50 are also arranged on the outer surface 41b of the other plate-like portion 41 with a predetermined gap S2 therebetween (a pair of elastic engaging pieces 50, 50). Two sets of pieces 50, 50 are provided on the left and right sides of the plurality of plate-like portions 41, for a total of four elastic engaging pieces 50). The space S2 is defined between the outer surface 41b of the predetermined plate-like portion 41 and the inner surface 50a (the surface facing the plate-like portion 41) of the elastic engaging piece 50 arranged to face the plate-like portion 41. , meaning space.

2 and 7, each elastic engaging piece 50 has a distal end 51 connected to the second tapered surface 48 of the distal end portion 45 of the shaft portion 40, and a proximal end 53 that It is connected to the head portion 20 (here, the back side of the third flange portion 27). 1 and 2, the outer surface 50b of the tip 51 of the elastic engagement piece 50 (the surface opposite to the inner surface 50a facing the plate-like portion 41) is the first tapered surface of the tip portion 45. It has a continuous planar shape (flush shape) with no cuts or recesses with respect to the outer peripheral surface of 47 .

Further, as shown in FIG. 7, each elastic engaging piece 50 has a shape that bulges slightly outward in the radial direction of the leg portion 30, and the outer surface 50b on the proximal end 53 side in the axial direction has: Two engaging portions 55 and 57 with different inclination angles are formed. Here, an engaging portion 55 is formed on the head portion 20 side, and an engaging portion 57 is connected to the engaging portion 55 on the tip portion 45 side. In addition, the angle of inclination of the engaging portion 57 with respect to the axis C of the leg portion 30 is formed larger than the angle of inclination of the engaging portion 55 with respect to the axis C of the leg portion 30 (the angle of inclination of the engaging portion 57 is formed at an obtuse angle than the engaging portion 55). 10 and 12, these engaging portions 55 and 57 are engaged with the rear peripheral edge of the mounting hole 3. As shown in FIGS.

As shown in FIG. 3, when the leg portion 30 is viewed from the outside in the radial direction, the space S2 is formed to be slightly narrower at the tip end side in the axial direction of the plate-like portion 41 and the elastic engaging piece 50. It is formed with a constant width from the middle in the axial direction to the base end side.

Further, in this fastener 10, only a gap S3 exists between the pair of elastic engaging pieces 50, 50 arranged on each side of the plurality of plate-like portions 41. there is

Referring also to FIG. 8, in this embodiment, of the pair of elastic engagement pieces 50, 50, one elastic engagement piece 50 has a facing surface 50c facing the other elastic engagement piece 50, and the other Between the elastic engaging piece 50 and the facing surface 50c of the one elastic engaging piece 50, only a gap S3 exists. This gap S3 constitutes the "gap" in the present invention.

Further, as shown in FIG. 4, when the leg portion 30 is viewed from the outside in the radial direction, the space S3 is in the shape of an elongated slit extending from the distal end 51 side of the elastic engaging piece 50 toward the proximal end 53 side. and communicates with the space S2 (see FIG. 8). Furthermore, this space S3 is formed so as not to reach the tip portion 45 . In this manner, the space S3 in this embodiment is closed at the axial distal and proximal ends of the leg 30 and is open radially outward and radially inward of the leg 30 .

In addition, when three or more plate-like portions are arranged, one pair of elastic engaging pieces is provided on one side portion in the parallel direction H and the other side portion in the parallel direction H among the plurality of plate-like portions. will be placed.

Further, in this embodiment, the outer surface 41b of one of the pair of plate-like portions 41 and 41 and the outer surface 41b of the other plate-like portion 41 are connected to the pair of elastic engaging pieces 50 and 50. There are no projections, ribs, etc. that reach the gap S3 between them (projections, etc. may be present, but they need to have a length that does not reach the gap S3). .

In this embodiment, the space S2 between the outer surface 41b of the plate-like portion 41 and the inner surface 50a of the elastic engagement piece 50 is also free of projections, ribs, and the like.

Further, as shown in FIGS. 2 and 3, the leg portion 30 is provided with a first connecting portion 60 and a second connecting portion 70 for connecting the adjacent plate-like portions 41, 41 to each other.

First, the second connecting portion 70 will be described. As shown in FIG. 3, the second connecting portion 70 has one side surface 71 and the other side surface 73 when viewed from the radial direction of the leg portion 30 (here, when viewed from the radially outer side). (It can also be said that the leg 30 has one side surface 71 and the other side surface 73 when the leg 30 is viewed in cross section along the axial direction, as shown in FIG. 6). extending along. Further, as shown in FIGS. 6 and 7, the second connecting portion 70 has a predetermined thickness (a constant thickness in this case) and has a substantially elongated plate shape extending long in the axial direction of the leg portion 30. ing.

As shown in FIG. 8 , the second connecting portion 70 extends along the axial direction of the leg portion 30 at a position between the pair of plate-like portions 41 , 41 and passing through the axis C of the leg portion 30 . placed in As shown in FIG. 8, both sides of the second connecting portion 70 in the longitudinal direction are connected to the inner surfaces 41a, 41a of the pair of plate-like portions 41, 41, respectively, and as shown in FIG. The distal end in the axial direction is connected to the distal end portion 45, and the proximal end in the axial direction is connected to the head portion 20 (here, the back side of the third flange portion 27). By connecting the second connecting part 70 in this way, as shown in FIG. , has a substantially H-shaped cross section.

On the other hand, as shown in FIG. 8, the first connecting portion 60 in this embodiment consists of a pair arranged with the second connecting portion 70 interposed therebetween. Each first connecting portion 60 has a head portion facing surface 61 facing the head portion 20 and a tip portion facing surface 63 facing the tip portion 45 in the axial direction, as shown in FIG. Moreover, as shown in FIG. 6, each first connecting portion 60 has a predetermined thickness (here, a constant thickness) and, as shown in FIG. It has a substantially rectangular shape extending in length.

As shown in FIGS. 2 and 6, each first connecting portion 60 is between the pair of plate-like portions 41, 41, and on the axial base end side (the side close to the head portion 20), the leg It is arranged so as to be orthogonal to the axial direction of the portion 30 . As shown in FIG. 8, each first connecting portion 60 is connected to the inner surfaces 41a, 41a of the pair of plate-like portions 41, 41 on both sides in the short direction (direction perpendicular to the longitudinal direction). In addition, the inner side surface 65 (the side surface in the direction orthogonal to the axial direction of the leg portion 30 and facing the axis C of the leg portion 30) is connected to the one side surface 71 or the other side surface 73 of the second connecting portion 70. be done. That is, the first connecting portion 60 is connected to the pair of plate-like portions 41 , 41 and also connected to the second connecting portion 70 .

6 and 8, the outer side surface 67 of the first connecting portion 60 (the side surface opposite to the inner side surface 65 and the side surface in the direction orthogonal to the axial direction of the leg portion 30) , the side surface of the leg portion 30 opposite to the axis C) project outward from the outer side surface 41 c of the plate-like portion 41 . Further, as shown in FIG. 8 , the outer side surface 67 of the first connecting portion 60 has a curved surface shape that fits the inner peripheral shape of the mounting hole 3 .

Furthermore, as shown in FIGS. 3 and 4, at least a portion of the first connecting portion 60 overlaps (laps) the engaging portion 55 of the elastic engaging piece 50 in the axial direction of the leg portion 30. are placed. As shown in FIG. 3, the first connecting portion 60 in this embodiment is arranged such that the axial position of the head-facing surface 61 is aligned with the engaging portion 57 of the elastic engaging piece 50 in the axial direction. , and the axial position of the tip facing surface 63 is located at a position slightly deviated toward the tip 45 beyond the engaging portion 57 of the elastic engaging piece 50 . Note that the axial position of the first connecting portion 60 is not limited to the position described above.

The shapes of the head, leg, shaft, plate-like portion, elastic engaging piece, first connecting portion, second connecting portion, etc., which constitute the fastener described above, are not limited to the above shapes. . Also, in this embodiment, both the first connecting portion and the second connecting portion are provided on the leg, but only one of them may be provided, or neither of them may be provided.

Furthermore, the material of the fastener configured as described above can be formed of, for example, a polyamide resin such as nylon, or a resin material such as polyacetal (POM) or polypropylene (PP). Alternatively, the resin material may be made of fiber-reinforced resin, which is reinforced by containing glass fiber, carbon fiber, metal fiber, or the like. In addition, each part constituting the fastener 10, that is, the head part 20, the leg part 30, the shaft part 40, the plate-like part 41, the elastic engaging piece 50, the first connecting part 60, the second connecting part 70, etc. , are integrally formed.

Next, the method of using the fastener 10 configured as described above and its operational effects will be described.

First, the neck portion 21 of the head portion 20 of the fastener 10 is inserted into the locking groove 8 of the mounting seat 7 of the mounting member 5 (see FIG. 1), and the mounting seat 7 is inserted into the first flange portion 23 and the second flange portion. The fastener 10 is attached to the mounting seat 7 by sandwiching it with 25 (see FIG. 9).

In this state, the leg portion 30 of the fastener 10 is inserted into the attachment hole 3 of the member 1 to be attached from the front side thereof. Then, the plurality of elastic engaging pieces 50 are pressed against the inner circumference of the mounting hole 3, and each elastic engaging piece 50 bends inward through the gap S2 and the gap S3, and the leg 30 moves. pushed in. Further, the outer peripheral edge of the third flange portion 27 of the head portion 20 is flexurally deformed so as to be pushed and expanded by the front side of the attached member 1 . After that, when the engaging portions 55 and 57 of each elastic engaging piece 50 are pulled out to the rear side of the mounting hole 3, each elastic engaging piece 50 is elastically restored and the engaging portion 55 is released as shown in FIG. The third flange portion 27 of the head portion 20 abuts on the front side of the mounting hole 3 while engaging with the back side peripheral edge of the mounting hole 3 . As a result, the fastener 10 is attached to the attachment hole 3, and the attachment member 5 can be attached to the member 1 to be attached via the fastener 10, as shown in FIG.

12 is thicker than the mounted member 1 shown in FIG. , and the third flange portion 27 of the head portion 20 is expanded more than the case shown in FIG.

In this embodiment, when the fastener 10 is attached to the attachment hole 3, even if the member to be attached 1 is thin as shown in FIG. Even so, the first connecting portion 60 is arranged at a position away from the rear side of the mounting hole 3 by a predetermined length, and is not positioned on the inner periphery of the mounting hole 3 .

As shown in FIG. 8, in this fastener 10, only a gap S3 is provided between the pair of elastic engaging pieces 50, 50 arranged on each side of the plurality of plate-like portions 41. configured to exist. Therefore, since the degree of freedom in the shape of each elastic engaging piece 50 can be increased, for example, the engaging portions 55 and 57 of the elastic engaging piece 50 can be shaped so that the cross section in the axial direction is thick. can. As a result, the engaging force of the leg portion 30 with respect to the mounting hole 3 can be increased.

In addition, since the shaft portion 40 has a plurality of plate-like portions 41, the rigidity of the shaft portion 40 can be increased. Even if an external force R in the radial direction shown in FIG. Circumferential corners 41 d of 41 c , etc.) can suppress rattling of the fastener 10 with respect to the mounting hole 3 .

By the way, there are cases where it is desired to remove the mounting member 5 from the mounting member 1 for reasons such as maintenance and part replacement. In this case, the mounting member 5 is grasped and separated from the mounted member 1 to pull out the leg portion 30 from the mounting hole 3 . In this case, it is difficult to pull out the leg 30 straight (parallel to the center C' of the mounting hole 3) from the mounting hole 3, and it is often pulled out obliquely to the center C' of the mounting hole 3. . At this time, in this fastener 10, since the shaft portion 40 has a plurality of plate-like portions 41, when the leg portion 30 is pulled out from the mounting hole 3, as shown in FIG. Even if a force G in an oblique direction acts, the deformation of the plate-like portion 41 can be suppressed as compared with the case where there is only one plate-like portion 41 .

Further, as shown in FIG. 8, the pair of elastic engaging pieces 50, 50 are arranged on each side of the plurality of plate-shaped portions 41, so that when the leg portion 30 is inserted into the mounting hole 3, When the leg portion 30 is pulled out from the mounting hole 3, and when the elastic engaging piece 50 is deformed while the leg portion 30 is engaged with the mounting hole 3, interference with the shaft portion 40 is suppressed. , a large amount of bending deformation of each elastic engaging piece 50 can be ensured, and changes in the inner diameter of the mounting hole 3 can be flexibly accommodated.

In this embodiment, as shown in FIG. 6, the leg portion 30 has a head-facing surface 61 and a tip-facing surface 63 in its axial direction. Further, as shown in FIGS. 3 and 4 , at least a part of the first connecting portion 60 is located in the axial direction of the leg portion 30 so that the elastic engagement piece 50 It is arranged so as to overlap the engaging portions 55 and 57 (here, it overlaps the engaging portion 57).

According to this aspect, at least a part of the first connecting portion 60 is arranged so as to overlap the engaging portion of the elastic engaging piece 50 in the axial direction of the leg portion 30 , so that the base end of the shaft portion 40 side stiffness can be increased. In addition, the first connecting portion 60 can be positioned on the inner periphery of the mounting hole 3 or can be arranged at a position close to the mounting hole 3 in the axial direction. It is possible to further suppress rattling of the fastener 10 with respect to the mounting hole 3 when a radial external force R acts on the leg portion 30 in a state where the fastener 10 is attached.

Furthermore, in this embodiment, as shown in FIG. 3, the leg portion 30 has one side surface 71 and the other side surface 73 when viewed from the radial direction, and the adjacent plate-like portions 41, 41 are connected to each other. A second connecting portion 70 extending in the axial direction of the leg portion 30 is provided, and as shown in FIG. there is

According to this aspect, since the adjacent plate-like portions 41, 41 are connected to each other by the second connecting portion 70 extending in the axial direction of the leg portion 30, the rigidity of the plurality of plate-like portions 41 can be increased. In addition, since the first connecting portion 60 is connected to the one side surface 71 and the other side surface 73 of the second connecting portion 70, the rigidity of the first connecting portion 60 can be increased. Further, when the leg portion 30 is pulled out from the mounting hole 3 in order to remove the fastener 10 from the mounting hole 3, a diagonal force G (see FIG. 10) is applied to the leg portion 30, or if the fastener 10 is not fastened to the mounting hole 3. When a radial external force R (see FIG. 8) acts on the leg portion 30 with the tool 10 attached, deformation of the shaft portion 40 can be suppressed.

Further, in this embodiment, as shown in FIGS. 2 to 7, the distal end portion 45 of the shaft portion 40 has a curved front end 46 and a first taper that gradually expands toward the head portion 20 . The distal end portion 45 has a block shape having a surface 47. A second tapered surface 48 having an inversely tapered shape gradually decreasing in diameter toward the head portion 20 is provided on the outer peripheral edge of the distal end portion 45 on the proximal end side. An elastic engaging piece 50 is connected to the two-tapered surface 48 .

According to this aspect, since the tip portion 45 of the shaft portion 40 has the shape as described above, when the leg portion 30 is inserted from the front side of the mounting hole 3, there is no burr or the like on the periphery of the mounting hole. However, since the first tapered surface 47 protects the shaft portion 40 from burrs and the like and serves as an insertion guide for the leg portion 30 , the leg portion 30 can be easily inserted into the mounting hole 3 and the shaft portion 40 can be easily removed. It can be made difficult to break. In addition, since a second tapered surface 48 having an inversely tapered shape whose diameter gradually decreases toward the head portion 20 is provided on the proximal side peripheral edge of the distal end portion 45 of the shaft portion 40 , the shaft portion 40 is fastened from the mounting hole 3 . When the leg portion 30 is pulled out from the mounting hole 3 in an oblique direction to remove the tool 10, the tip portion 45 of the shaft portion 40 is less likely to get caught on the inner circumference of the mounting hole 3. It becomes easy to pull out, and the elastic engagement piece 50 can be made hard to be damaged.

Figures 14-17 show another embodiment of the fastener according to the invention. In addition, the same code|symbol is attached|subjected to the substantially same part as the said embodiment, and the description is abbreviate|omitted.

10 A of fasteners of this embodiment differ in the formation position of the 1st connection part 60 with respect to the said embodiment.

That is, as shown in FIG. 14, the first connecting portion 60 of the fastener 10A of this embodiment is arranged to be shifted toward the head portion 20 from the connecting portion 60 of the above embodiment. More specifically, the first connecting portion 60 in this embodiment is arranged at a position where the axial position of the head facing surface 61 is aligned with the engaging portion 55 of the elastic engaging piece 50 in the axial direction. In addition, the axial position of the tip facing surface 63 is arranged at a position aligned with the middle of the axial direction of the engaging portion 57 of the elastic engaging piece 50, and the entire axial direction (entire thickness direction) is engaged. It is positioned so as to overlap the portions 55 and 57 . Further, the outer surface 67 of the first connecting portion 60 protrudes outward from the outer surface 41c of the plate-like portion 41 and has a curved shape that fits the inner peripheral shape of the mounting hole 3, as in the above-described embodiment. ing.

In this embodiment, when the fastener 10 is attached to the attachment hole 3, even if the member to be attached 1 is thin as shown in FIG. Even so, the first connecting portion 60 is positioned so as to overlap the inner circumference of the mounting hole 3 . Further, as described above, the outer side surface 67 of the first connecting portion 60 protrudes further outward than the outer side surface 41c of the plate-like portion 41 and has a curved surface shape that fits the inner peripheral shape of the mounting hole 3. Therefore, as shown in FIG. 17, when the fastener 10A is attached to the mounting hole 3 and radial external force R acts on the leg portion 30 from various directions, the inner circumference of the mounting hole 3 is hit. A wide contactable part can be secured. As a result, it is possible to flexibly respond to radial external forces R acting on the leg portion 30 from various directions, and to more effectively suppress rattling of the fastener 10 with respect to the mounting hole 3 .

Figures 18 and 19 show yet another embodiment of the fastener according to the invention. In addition, the same code|symbol is attached|subjected to the substantially same part as the said embodiment, and the description is abbreviate|omitted.

The fastener 10B of this embodiment differs from the previous embodiment in the formation range of the gap S3. That is, as shown in FIGS. 18 and 19, the gap S3 formed between the pair of elastic engaging pieces 50, 50 is formed to reach the distal end portion 45 of the shaft portion 40, and The tip side is open.

In this embodiment, as described above, since the space S3 is open at the tip side in the axial direction, a part of the outer peripheral shape and a part of the inner peripheral shape of the leg portion 30 can be formed from the tip side opening. The mold can be removed, and the moldability of the fastener 10B can be improved.

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

3 Mounting holes 10, 10A, 10B Fastener 20 Head 30 Leg 40 Shaft 41 Plate-like portion 45 Tip 46 Tip 47 First tapered surface 48 Second tapered surface 50 Elastic engaging pieces 55, 57 Engaging portion 60 First connecting portion 61 Head facing surface 63 Tip facing surface 67 Outer side surface 70 Second connecting portion 71 One side surface 73 Other side surface

Claims (5)

A fastener to be attached to the mounting hole,
It has a head part that abuts on the front side of the mounting hole, and a leg part that is inserted into the mounting hole and engages with the back side thereof,
The leg portion has a shaft portion and an elastic engaging piece that is flexurally deformable and has an engaging portion that engages with the rear peripheral edge of the mounting hole,
The shaft portion has a plurality of plate-like portions extending in parallel from the back side of the head portion in the axial direction,
The elastic engaging pieces are connected to the distal end of the shaft portion, and are arranged in pairs on each side of the plurality of plate-like portions when viewed from the axial direction of the leg portion. has been
A fastener according to claim 1, wherein only a gap is present between a pair of said elastic engaging pieces arranged on each side of said plurality of plate-shaped parts. The leg has a head-facing surface facing the head and a tip-facing surface facing the tip in the axial direction, and connects the adjacent plate-like portions to each other. A connecting part is provided,
2. The fastener according to claim 1, wherein at least part of said first connecting portion is arranged so as to overlap said engaging portion of said elastic engaging piece in the axial direction of said leg portion. 3. The fastener according to claim 2, wherein an outer peripheral end face of said first connecting portion protrudes outward from an outer peripheral end face of said plate-like portion and has a curved shape conforming to an inner peripheral shape of said mounting hole. a second connecting portion having one side surface and the other side surface when viewed from the radial direction of the leg portion and extending in the axial direction of the leg portion by connecting the adjacent plate-like portions;
The fastener according to claim 2 or 3, wherein the first connecting portion is connected to one side surface and the other side surface of the second connecting portion. The distal end portion of the shaft portion has a curved surface shape at its distal end and a block shape having a first tapered surface that gradually expands in diameter toward the head portion. 5. The method according to any one of claims 1 to 4, wherein the peripheral edge is provided with a second tapered surface having a reverse tapered shape whose diameter gradually decreases toward the head, and the elastic engaging piece is connected to the second tapered surface. A fastener according to any one of the preceding claims.

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