JP6569925B2 - Fastener - Google Patents

Description

  The present invention relates to a fastener that is inserted into a mounting hole and fixed.

  For example, a mounting hole is formed in a vehicle body panel or the like of an automobile, and a trim board or the like is attached to the vehicle body panel or the like via a fastener that is inserted into the mounting hole and fixed. In addition, a fastener (so-called hole plug) may be attached to close a hole formed in the vehicle body panel or the like.

  As this type of conventional art, the following Patent Document 1 includes a head that engages with a mounting member, and a leg that extends from the head and is mounted through a mounting hole of a mounted member. The portion has a flange adjacent to the head and abutting against one surface of the mounted member, and a shaft portion extending from the flange, and the shaft portion is an elastic member that is locked in a mounting hole of the mounted member. A clip having a stop is described.

  The shaft portion is extended in the circumferential direction so as to be opposite to each other from a pair of elongated plate-like column portions eccentrically disposed adjacent to the center of the leg portion and the outer diameter side end portions of the respective column portions. It has a pair of elastic locking portions and has a substantially S-shaped cross section. In addition, this axial part is formed by a pair of right-and-left division | segmentation type | molds opened and closed in the direction orthogonal to the axial direction of a leg part. In addition, the base end side of each column portion and each elastic locking portion of the shaft portion is all connected to the back surface of the flange, and the tip end side of each column portion and each elastic locking portion of the shaft portion is The structure is connected to each other via a connecting portion.

JP 2002-227809 A

  However, the clip of Patent Document 1 is such that the base end side of each column portion of the shaft portion and each elastic locking portion is connected to the back surface of the flange, and the distal end portion of each column portion and each elastic locking portion. Since the sides are also connected to each other via the connecting portion, when the leg portion is inserted into the mounting hole of the mounted member, the elastic locking portion pressed against the inner periphery of the mounting hole becomes difficult to bend and the leg portion is inserted. There was an inconvenience that it was difficult to do. Further, since the elastic locking portion is difficult to bend, there is also a problem that it is difficult to cope with a change in the inner diameter of the mounting hole of the mounted member.

  Therefore, the objective of this invention is providing the fastener which can improve the insertion property to an attachment hole, and can also expand the application width | variety with respect to an attachment hole internal diameter.

  In order to achieve the above object, the present invention provides a fastener that is inserted into a mounting hole and attached thereto, the head being disposed on the front side of the mounting hole, and the head connected to and extending from the head. A leg portion inserted and locked in the hole, and the leg portion includes a plurality of shaft portions extending from the back surface of the head with a gap therebetween, and the plurality of shaft portions. And an elastic engagement piece that extends from at least a pair of shaft portions in the outer diameter direction and / or circumferential direction of the leg portion and engages with a rear peripheral edge of the mounting hole, and separates the plurality of shaft portions. The gap to be formed is formed so as to penetrate the front end portion of the leg portion in the insertion direction into the mounting hole and / or the head portion in the axial direction.

  According to the fastener of the present invention, the gap separating the plurality of shaft portions of the leg portion penetrates the tip portion of the leg portion in the insertion direction into the mounting hole and / or the head portion in the axial direction. Since it is formed, when the leg portion is inserted into the mounting hole of the mounted member and the elastic engagement piece is pressed to the inner periphery of the mounting hole to bend and deform, the shaft portion pressed through the elastic engagement piece The leg can be easily bent and the entire leg portion can be easily bent. As a result, the insertion resistance of the leg portion to the mounting hole can be reduced and the insertability can be improved. Also, not only the elastic engagement piece but also the shaft part is easily bent, so that the leg part can be inserted and locked even if the inner diameter of the mounting hole varies somewhat. The width can be increased.

It is a perspective view which shows 1st Embodiment of the fastener of this invention. It is an expansion perspective view of the fastener. It is the perspective view seen from the direction different from FIG. 2 of the fastener. It is a front view of the fastener. It is a longitudinal cross-sectional view of the same fastener. It is sectional drawing in the AA arrow line of FIG. It is explanatory drawing which shows the state which attached the attachment member to the to-be-attached member via the fastener. (A) is a cross-sectional view of FIG. 7, (b) is a cross-sectional view when the inner diameter of the mounting hole is smaller than (a). It is the longitudinal cross-sectional view seen from the direction different from FIG. 5 of the fastener. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the fastener of this invention. It is a longitudinal cross-sectional view which shows 3rd Embodiment of the fastener of this invention. The 4th Embodiment of the fastener of this invention is shown and it is the front view. It is a longitudinal cross-sectional view of the same fastener. It is a cross-sectional view of the fastener. It is a perspective view which shows 5th Embodiment of the fastener of this invention. It is a front view of the fastener. It is sectional drawing in the DD arrow line of FIG. It is sectional explanatory drawing which shows the state which attached the attachment member to the to-be-attached member via the fastener. It is a perspective view which shows 6th Embodiment of the fastener of this invention. It is a front view of the fastener. It is sectional drawing in the EE arrow line of FIG. It is sectional explanatory drawing which shows the state which attached the attachment member to the to-be-attached member via the fastener.

  Hereinafter, with reference to FIGS. 1-9, 1st Embodiment of the fastener of this invention is described.

  This fastener is inserted into an attachment hole formed in a predetermined member and fixed. As shown in FIGS. 1 and 7, the fastener 10 in this embodiment is locked to a mounting seat 7 formed on the mounting member 5 and has a circular mounting formed on the mounted member 1, for example. It is inserted into the hole 3 and fixed, and is used to attach the attachment member 5 to the attachment member 1.

  The “back side of the mounting hole” in the present invention is one side portion in the thickness direction of the member in which the mounting hole is formed (here, the mounted member 1), and is the head placement side of the fastener. Means the other side.

  Examples of the mounted 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, and an insulator (soundproof material). Although it is mentioned, it is not limited to these. Further, the mounting seat 7 of the mounting member 5 has a frame shape in which one side portion (receiving side of the fastener 10) is opened and a locking groove 8 is formed on the bottom surface. The head 20 can be held. However, for example, a circular insertion hole may be provided in the attachment member 5 and the head 20 of the fastener 10 may be engaged with the front side, and there is no particular limitation. The fastener may be used not only for the above-mentioned purposes but also for closing the mounting hole (so-called hole plug), and is not particularly limited.

  As shown in FIGS. 1 to 5, the fastener 10 includes a head 20 disposed on the front side of the mounting hole 3 of the mounted member 1, and is connected to the head 20 and extends to the mounting hole 3. And a leg portion 30 that is inserted into and locked to.

  First, the head 20 will be described. The head 20 in this embodiment includes a neck 21 inserted into the locking groove 8 of the mounting seat 7 of the mounting member 5 and a circle extending from the outer periphery of the tip of the neck 21. A plate-like first flange portion 23, a thin-plate-like second flange portion 25 extending from the outer periphery of the neck portion 21 at a predetermined position in the axial direction, and a back surface side of the second flange portion 25; The outer periphery is composed of a third flange portion 27 that spreads in a skirt shape obliquely outward toward the leg portion 30 side.

  Then, the neck portion 21 of the head 20 is inserted into the locking groove 8 of the mounting seat 7, and the mounting seat 7 is sandwiched between the first flange portion 23 and the second flange portion 25, so that the fastener 10 is attached to the mounting seat 7. Is mounted (see FIG. 7). Note that the structure of the head is not limited to the above-described mode, and may be any shape that engages with the front side periphery of the mounting hole formed in the predetermined member.

  On the other hand, as shown in FIGS. 2, 3, and 5, the leg portion 30 of this embodiment includes a plurality of shaft portions 31 that extend from the back surface of the head 20 with a gap 35 therebetween. The elastic engagement piece 40 extends in the circumferential direction of the leg portion 30 from each shaft portion 31 and engages with the rear side periphery of the mounting hole 3. In addition, as an elastic engagement piece in a leg part, you may extend in the outer-diameter direction of a leg part and / or the circumferential direction from at least a pair of shaft part among several shaft parts (About this aspect) Will be described later in the sixth embodiment), and is not particularly limited.

  As shown in FIG. 3, the plurality of shaft portions 31 in this embodiment are composed of a pair of third flange portions 27 of the head 20 extending from the flat back surface, and the pair of shaft portions 31, 31. A gap 35 is provided between them.

  As shown in FIG. 6, each shaft portion 31 has a plurality of shaft portions 31 (a plurality of shaft portions 31) when the leg portion 30 is viewed in a cross section orthogonal to the axial direction (hereinafter, also referred to as a “cross section of the leg portion 30”). An end portion 32 on the inner peripheral side (the inner peripheral side of the leg portion 30) of the shaft portion 31), and an end portion 33 on the outer peripheral side (the outer peripheral side of the leg portion 30) of each shaft portion 31 (the plurality of shaft portions 31); Are arranged on a straight line L passing through the center C of the leg 30. As shown in FIG. 3, the end on the head 20 side of each shaft portion 31 forms a diameter-expanded portion 34 that is slightly larger in diameter than the other portions of the shaft portion 31. 34 is connected to the third flange portion 27 of the head 20.

  Further, as shown in FIG. 6, the gap 35 that separates the plurality of shaft portions 31 has a common inner peripheral side of each shaft portion 31 (the plurality of shaft portions 31) in a cross section orthogonal to the axial direction of the leg portion 30. As a result, the inner periphery (here, the end portion 32 on the inner periphery side) of each shaft portion 31 (the plurality of shaft portions 31) has an arc shape.

  In addition, in the leg part 30 of this embodiment, although it has a pair of axial parts 31, 31, you may have a shaft part of three, four pieces, or more, for example. (The four shaft portions will be described in an embodiment described later), and it is only necessary to have a gap between them. Further, the shape of each shaft portion may be a cross-sectional long plate shape or a cross-sectional circular shape, and is not particularly limited.

  Further, as shown in FIG. 6, the elastic engagement piece 40 in this embodiment is formed from end portions 33, 33 on the outer peripheral side of the pair of shaft portions 31, 31 when the cross section of the leg portion 30 is viewed. A pair of elastic engagement pieces 40, which are curved so as to spread in the outer diameter direction along the circumferential direction of the legs 30 and extend through the gaps 37 with respect to the shafts 31, respectively. 40 is arranged point-symmetrically with respect to the center C of the leg 30. Note that the gaps 37 and 37 communicate with a gap 35 provided between the pair of shaft portions 31 and 31 (see FIG. 6).

  Each elastic engagement piece 40 has an end edge 41 on the head 20 side in the axial direction of the leg 30 separated from the head 20 (see FIGS. 3 to 5). Further, on the outer peripheral surface of each elastic engagement piece 40 on the end edge 41 side, there is provided an engaging portion 43 that bulges so as to engage with the rear peripheral edge of the mounting hole 3 (see FIG. 7). . Furthermore, a portion of each elastic engagement piece 40 closer to the end edge 41 than the engagement portion 43 forms an insertion portion 44 that is inserted into the inner periphery of the attachment hole 3 (see FIG. 7). As shown in FIGS. 2 to 4, each elastic engagement piece 40 has a leg portion 30 on a side surface of the leg portion 30 in the insertion direction side (the side opposite to the head portion 20 in the axial direction of the leg portion 30). The cut portions 46 are formed so that the extension length from the shaft portion 31 becomes shorter toward the front end of the shaft. Thereby, the elastic engagement piece 40 is inserted when the leg portion 30 is inserted into the mounting hole 3. It is easy to bend.

  The elastic engagement piece 40 of this embodiment has a shape extending from the shaft portion 31 in the circumferential direction and the outer diameter direction of the leg portion 30, but as the elastic engagement piece, the periphery of the leg portion from the shaft portion is used. There may be a shape extending only in the direction, or a shape extending only in the outer diameter direction, and there is no particular limitation as long as the shape can be engaged with the back side of the mounting hole.

  In addition, the plurality of shaft portions 31 are connected to the distal end side of the leg portion 30 in the insertion direction by a connecting portion 50. 2-5, in this embodiment, the insertion direction front end side of the leg part 30 of a pair of shaft parts 31 and 31 and a pair of elastic engagement pieces 40 and 40 is mutually connected by the connection part 50. As shown in FIG. ing. In addition, the connecting portion 50 has a tapered shape that gradually decreases in diameter toward the distal end side in the insertion direction of the leg portion 30.

  Further, as shown in FIGS. 3 and 5, the outer periphery of the connecting portion 50 on the insertion direction side of the leg portion 30 is positioned at a position aligned with the distal end portion of the pair of shaft portions 31, 31 in the insertion direction of the leg portion 30. In addition, the lightening recesses 51 and 51 are formed.

  In the fastener of the present invention, the gap 35 that separates the plurality of shaft portions 31 penetrates the tip portion 30 of the leg portion 30 in the insertion direction into the mounting hole 3 and / or the head portion 20 in the axial direction. It is formed as follows.

  As shown in FIG. 5, in the fastener 10 of this embodiment, the gap 35 separating the pair of shaft portions 31, 31 is formed so as to penetrate the head portion 20 in the axial direction. That is, the gap 35 separating the pair of shaft portions 31, 31 passes through the centers of the third flange portion 27, the second flange portion 25, the neck portion 21, and the first flange portion 23 of the head 20, respectively. 10 has a shape communicating with the outside.

  In addition, the above-mentioned gap does not penetrate the head 20 side but penetrates the distal end side in the insertion direction 3 of the leg 30 into the mounting hole 3, or penetrates both the head 20 and the distal end side in the insertion direction of the leg 30. However, there is no particular limitation (these will be described in the embodiments described later). As shown in FIG. 5, the inner circumferential surface of the gap 35 has a tapered surface shape in which the distal end side in the insertion direction of the leg portion 30 is narrow and gradually becomes wider toward the upper end opening through which the head 20 penetrates. Yes.

  For example, as shown in FIG. 5 and FIG. 6, the above fastener 10 includes an outer peripheral shape of the head 20, a pair of shaft portions 31, 31 of the leg portion 30, a pair of elastic engagement pieces 40, The outer circumference and inner circumference shape of 40 can be formed by molds S1 and S2 that move in a direction perpendicular to the axis of the leg portion 30, and the inner circumference shape of the pair of shaft portions 31, 31 and the head 20 The inner peripheral shape and the gap 35 can be formed by a mold S3 (see FIG. 5) that moves in the axial direction of the leg portion 30.

  Next, the usage method and effect of the fastener 10 which consists of the said structure are demonstrated.

  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 mounted on the mounting seat 7 by being sandwiched at 25 (see FIG. 7).

  In this state, the leg 30 of the fastener 10 is inserted into the mounting hole 3 of the mounted member 1 from the front side. Then, the pair of elastic locking pieces 40, 40 are pressed on the inner periphery of the mounting hole 3, and the pair of elastic engagement pieces 40, 40 are bent toward the inner side of the leg portion. The leg portion 30 is pushed in while the pair of shaft portions 31 and 31 are also pushed and bent through the via. At this time, the pair of shaft portions 31, 31 is bent in a direction in which the end portions 32, 32 on the inner peripheral side are close to each other (see arrow F <b> 1 in FIG. 6), and a straight line passing through the center C of the leg portion 30. It bends in a direction crossing the bending direction of the end portion 32 so as to be displaced from L (see arrow F2 in FIG. 6).

  Thereafter, when the engaging portion 43 of each elastic engaging piece 40 comes out to the back side of the mounting hole 3, the pair of elastic engaging pieces 40, 40 and the pair of shaft portions 31, 31 are elastically restored, and the engaging portion 7 and 43 are engaged with the rear peripheral edge of the mounting hole 3, and the third flange portion 27 of the head 20 is brought into contact with the front side of the mounting hole 3, so that the fastener 10 is attached to the mounting hole 3. As shown in FIG. 5, the attachment member 5 can be attached to the attached member 1 via the fastener 10. As shown in FIG. 8A, in this state, the pair of elastic engagement pieces 40, 40 are bent, and the insertion portions 44, 44 are inserted into the inner periphery of the mounting hole 3. Compared with the state shown in FIG. 6, the pair of shaft portions 31, 31 are arranged in the mounting hole 3 in a state of being bent and deformed.

  And in this fastener 10, the gap | interval 35 which isolate | separates a pair of axial parts 31 and 31 of the leg part 30 is formed so that the head 20 may be penetrated to an axial direction (refer FIG. 5). Therefore, as described above, when the leg portion 30 is inserted into the mounting hole 3 and the elastic engagement piece 40 is pressed and deformed by the inner periphery of the attachment hole, the shaft is pressed through the elastic engagement piece 40. Since the part 31 can also be easily bent and the entire leg part 30 can be easily bent, the insertion resistance of the leg part 30 into the mounting hole 3 can be reduced and the insertability can be improved.

  Further, FIG. 8B shows that the fastener 10 can be attached even to the attachment hole 3A having an inner diameter smaller than that of the attachment hole 3 shown in FIG. That is, in this fastener 10, since the plurality of shaft portions 31 are provided separated by the gap 35, not only the elastic engagement piece 40 but also the shaft portion 31 can be easily bent, Even if the inner diameter is slightly changed from the mounting hole 3 to the mounting hole 3A, the leg 30 can be inserted and locked as shown in FIG. The application range can be expanded. Although not particularly illustrated, even if the inner diameter of the mounting hole is slightly larger than that of the mounting hole 3, if the engaging portion 43 of the elastic engagement piece 40 can be engaged with the back side of the mounting hole, the fastener 10 can be attached.

  Further, as shown in FIG. 6, in this embodiment, the gap 35 that separates the plurality of shaft portions 31 has an arc shape that is cut out by a common circle R in a cross section orthogonal to the axial direction of the leg portions 30. Therefore, when the leg portion 30 is inserted into the mounting hole 3, the pressing force acting on the shaft portion 31 via the elastic engagement piece 40 is easily dispersed in the circumferential direction, and the specific portion of the shaft portion 31 is moved. It is possible to reduce the stress concentration and to prevent the shaft portion 31 from being damaged.

  Furthermore, in this embodiment, the end portion 32 on the inner peripheral side of each shaft portion 31 (the plurality of shaft portions 31) and the end portion 33 on the outer peripheral side of each shaft portion 31 (the plurality of shaft portions 31) are legs. It arrange | positions on the straight line L which passes along the center C of the part 30 (refer FIG. 6). Therefore, it is possible to ensure a long length along the circumferential direction of the leg portion 30 of the elastic engagement piece 40 (if the shaft portion 31 is displaced from the center of the leg portion, the elastic engagement piece 40 is It is difficult to ensure the length in the circumferential direction), and the engagement area of the attachment hole 3 to the back side periphery can be widened, and the engagement force of the elastic engagement piece 40 with respect to the attachment hole 3 can be increased. Further, since the length of the shaft portion 31 on the radial direction side of the leg portion 30 can be shortened, the shaft portion 31 can be more easily bent when the leg portion 30 is inserted into the mounting hole 3 ( If it is long, the rigidity is increased and it is difficult to bend), and the leg portion 30 can be easily inserted into the mounting hole 3.

  As shown in FIGS. 3 to 5, in this embodiment, the edge 41 on the head 20 side in the axial direction of the leg 30 of the elastic engagement piece 40 is separated from the head 20. When inserting the leg portion 30 into the mounting hole 3, the elastic engagement piece 40 can be further easily bent, and the insertability of the leg portion 30 into the mounting hole 3 can be improved.

  Further, as shown in FIGS. 5 and 9, in this embodiment, the plurality of shaft portions 31 are connected to the distal end side in the insertion direction of the leg portion 30 by the connecting portion 50, and the leg portion 30 of the connecting portion 50 is inserted. On the outer periphery on the direction side, a thinning recess 51 is formed at a position of the shaft portion 31 aligned with the distal end portion of the leg portion 30 in the insertion direction.

  That is, when the connecting portion 50 is not provided with the concave portion 51 and there is meat (see the imaginary line in FIG. 9), the bending fulcrum M2 of the elastic engaging piece 40 is connected to the connecting portion 50 of the elastic engaging piece 40. It becomes a part inside, and the length of this bending fulcrum M2 and the front-end | tip of the elastic engagement piece 40, ie, the bending length of the elastic engagement piece 40, becomes D2. On the other hand, when the recessed part 51 is provided in the connection part 50, since the bending fulcrum M1 of the elastic engagement piece 40 becomes a position inside the leg part front end side thinned by the recessed part 51, the elastic engagement piece The length of the bending fulcrum M1 on the distal end side of the leg 40 and the distal end of the elastic engagement piece 40, that is, the bending length of the elastic engagement piece 40 is D1. Therefore, when the recessed part 51 is provided in the connection part 50, the leg part 30 is inserted in the inner periphery of the attachment hole 3, and the bending length D1 of the elastic engagement piece 40 pressed by the inner periphery of the attachment hole 3 is provided. Can be ensured longer than the bending length D2 of the elastic engagement piece 40 in the case where there is no recess, so that the elastic engagement piece 40 can be more easily bent when the leg 30 is inserted into the mounting hole 3. It is possible to make it easier to insert the leg 30 into the mounting hole 3.

  FIG. 10 shows a second embodiment of the fastener of the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 10, in the fastener 10 </ b> A of this embodiment, the gap 35 that separates the plurality of shaft portions 31 has the connection portion 50 provided at the distal end portion of the leg portion 30 in the insertion direction into the mounting hole 3. The head 20 is formed so as to penetrate the head 20 in the axial direction.

  In this embodiment, the gap 35 penetrates both the front end 20 and the head 20 in the insertion direction of the leg 30 into the attachment hole 3 in the axial direction, so when inserting the leg 30 into the attachment hole 3, The entire leg 30 can be bent more easily, and the insertion resistance of the leg 30 into the mounting hole 3 can be further reduced.

  FIG. 11 shows a third embodiment of the fastener of the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 11, in the fastener 10 </ b> B of this embodiment, the gap 35 that separates the plurality of shaft portions 31 has the connecting portion 50 provided at the distal end portion of the leg portion 30 in the insertion direction into the mounting hole 3. It is formed so as to penetrate in the direction.

  In this embodiment, when the leg 30 is inserted into the mounting hole 3, the gap 35 is formed through the front end of the leg to be inserted first, so that when the leg 30 is inserted into the mounting hole 3, The pair of shaft portions 31, 31 can be easily bent, and insertion resistance of the leg portion 30 into the mounting hole 3 can be reduced.

  12 to 14 show a fourth embodiment of the fastener of the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIGS. 12-14, the fastener 10C of this embodiment differs in the structure of the leg part 30C from the said embodiment. That is, the leg portion 30C in this embodiment includes four shaft portions 31 extending from the back side of the head 20 and end portions 33 on the outer peripheral side of the shaft portions 31, respectively, in the circumferential direction and the outer diameter direction. It has four extended elastic engagement pieces 40 and has a substantially impeller shape (see FIG. 14). Further, as shown in FIG. 14, the shaft portions 31 are arranged at equal intervals in the circumferential direction of the leg portions 30 when the leg portions 30 </ b> C are viewed in a cross section. The gap 35 that separates 31 has a shape in which the inner peripheral side of each shaft portion 31 (a plurality of shaft portions 31) is cut out by a common circle R, and, similar to the above-described embodiment, each shaft portion 31 (a plurality of shaft portions 31). The end portion 32 on the inner peripheral side of the shaft portion 31) has an arc shape. Further, as shown in FIG. 13, the gap 35 separating the four shaft portions 31 is formed so as to penetrate the head portion 20 in the axial direction. As shown in FIG. 14, each shaft portion 31 (plural shaft portions 31) has a shaft portion 31 (plural shaft portions 31) when the leg portion 30 </ b> C is viewed in a cross section orthogonal to the axial direction. The end portion 32 on the inner peripheral side (the inner peripheral side of the leg portion 30) and the end portion 33 on the outer peripheral side (the outer peripheral side of the leg portion 30) of each shaft portion 31 (the plurality of shaft portions 31) are the leg portions 30C. It is arranged on a straight line L passing through the center C of.

  Also in this embodiment, since the gap 35 separating the four shaft portions 31 provided in the leg portion 30C is formed so as to penetrate the head portion 20 in the axial direction, the leg portion 30C to the mounting hole 3 is formed. At the time of insertion, each shaft portion 31 pushed through the elastic engagement piece 40 can be easily bent, and the entire leg portion 30C can be easily bent. Thus, in the present invention, even if there are a plurality of elastic engagement pieces 40, the plurality of shaft portions 31 can be easily bent by the gaps 35, and the insertion resistance of the leg portions 30C into the mounting holes 3 can be reduced. Insertability can be improved.

  15 to 18 show a fifth embodiment of the fastener of the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIGS. 15-18, the fastener 10D of this embodiment differs in the structure of the leg part 30D from the said embodiment. That is, the leg portion 30D in this embodiment has a pair of first shaft portions 36, which are arranged to oppose each other in the radial direction of the leg portion 30D and have elastic engagement pieces 46 extending in the circumferential direction of the leg portion 30D. 36 and the axis of the leg 30D (center C of the leg 30D shown in FIG. 17), the pair of first shafts 36 and 36 are disposed at positions that do not overlap with each other, and the leg 30D It has at least a pair of second shaft portions 38 and 38 each having an elastic engagement piece 48 extending in the outer diameter direction.

  As shown in FIG. 17, in this embodiment, when the leg portion 30D is viewed in a cross section orthogonal to the axial direction (hereinafter, also referred to as a “cross section of the leg portion 30D”), a pair of first shaft portions 36 are provided. , 36 is a straight line L1 in which an end portion 32 on the inner peripheral side (the inner peripheral side of the leg portion 30D) and an end portion 33 on the outer peripheral side (the outer peripheral side of the leg portion 30D) pass through the center C of the leg portion 30D. Is placed on top. However, the second shaft portion only needs to have at least one pair, and may include two or more pairs of second shaft portions.

  Further, as shown in FIG. 17, when the cross section of the leg portion 30D is viewed, from the end portions 33, 33 on the outer peripheral side of the pair of first shaft portions 36, 36, along the circumferential direction of the leg portion 30D. The elastic engagement pieces 46 and 46 extend so as to be curved. These elastic engagement pieces 46 and 46 extend in the same extending direction K1 with respect to the leg portion 30D, and are arranged point-symmetrically with respect to the center C of the leg portion 30D. In addition, each elastic engagement piece 46 is extended so that it may become shorter than the elastic engagement piece 40 of 1st Embodiment shown in FIG. 6 (refer FIG. 17). As shown in FIGS. 15 and 16, each elastic engagement piece 46 has an end edge 41 on the head 20 side in the axial direction of the leg 30 </ b> D that is separated from the head 20, and an end edge. On the outer peripheral surface on the 41 side, an engaging portion 43 that engages with the rear peripheral edge of the mounting hole 3 is provided.

  On the other hand, as shown in FIG. 17, the second shaft portion 38 in this embodiment overlaps with the pair of first shaft portions 36 and 36 across the axis of the leg portion 30D (center C of the leg portion 30D). It consists of a pair of items that are placed at positions that do not become necessary. As shown in FIG. 17, the elastic engagement pieces 48 of the second shaft portions 38 are inclined in the same direction as the extending direction of the elastic engagement pieces 46 of the first shaft portions 36 with respect to the leg portions 30D. The leg portion 30D extends in the outer diameter direction.

  That is, as shown in FIG. 17, when viewed in the cross section of the leg portion 30D, each second axis is orthogonal to the straight line L1 and passes through the center C of the leg portion 30D. The elastic engagement piece 48 of the portion 38 is inclined in the same inclination direction K2 as the extending direction K1 of the elastic engagement piece 46 of the first shaft portion 36 and extends in the outer diameter direction of the leg portion 30D. Each second shaft portion 38 is also inclined in the same direction as the extending direction K1 of the elastic engagement piece 46 of the first shaft portion 36 with respect to the leg portion 30D, and extends in the outer diameter direction of the leg portion 30D. (See FIG. 17). Further, as shown in FIG. 17, the pair of second shaft portions 38, 38 and the elastic engagement pieces 48, 48 are located with respect to the center C of the leg portion 30D when viewed in a cross section of the leg portion 30D. Are arranged symmetrically with respect to each other and are arranged in parallel to each other. Further, as shown in FIGS. 15 and 18, the first shaft portion 36 and the second shaft portion 38 are connected to the head portion 20.

  As shown in FIGS. 15 and 16, each elastic engagement piece 48 has a tapered surface on the distal end side in the insertion direction of the leg portion 30D and a base end portion on the head 20 side at the head end. It is spaced apart from the portion 20 to form a tapered surface-shaped engaging portion 43 that engages with the back side periphery of the mounting hole 3, and extends from the second shaft portion 38 toward the outer diameter direction of the leg portion 30D. It has a shape. Further, as shown in FIG. 16, the engaging portion 43 of each elastic engaging piece 48 is disposed at a position substantially aligned with the engaging portion 43 of the elastic engaging piece 46 of the first shaft portion 36.

  And in the fastener 10D of this embodiment, as shown in FIG. 18, the gap 35 separating the pair of first shaft portions 36, 36 and the pair of second shaft portions 38, 38 is a leg portion 30D. Is formed so as to penetrate the tip end portion in the insertion direction into the mounting hole 3 in the axial direction. Further, as shown in FIGS. 15 and 16, each first shaft portion 36 and its elastic engagement piece 46 in the insertion direction front end side of the leg portion 30 </ b> D, each second shaft portion 38 and its elastic engagement piece 48. The leg 30D in the insertion direction front end side is connected to each other by an annular connecting part 50D. The connecting portion 50D communicates with the gap 35, and its outer surface has a tapered surface shape that gradually decreases in diameter toward the distal end side in the insertion direction of the leg portion 30D.

  In the fastener 10D having the above-described configuration, the leg portion 30D includes the pair of first shaft portions 36 and 36 and the pair of second shaft portions 38 and 38, so that the cross-sectional area is increased. Can be made. As a result, as shown in FIG. 18, the leg portion 30 </ b> D is inserted into the mounting hole 3, and the engagement portion 43 of the elastic engagement piece 46 of each first shaft portion 36 and the elastic engagement of each second shaft portion 38. Even when the engagement portion 43 of the piece 48 is engaged with the back side periphery of the attachment hole 3, even if a shearing force F3 (lateral force perpendicular to the center of the attachment hole 3) acts on the leg 30D, The strength against the shearing force F3 can be increased. Further, the elastic engagement pieces 46, 46 of the pair of first shaft portions 36, 36 and the elastic engagement pieces 48, 48 of the pair of second shaft portions 38, 38 are respectively engaged with the back side peripheral edge of the mounting hole 3. Therefore, it is possible to increase the number of engagement points with respect to the back side periphery of the mounting hole 3 and increase the holding force of the fastener 10 </ b> D with respect to the mounting hole 3.

  Furthermore, in this embodiment, as shown in FIG. 17, the elastic engagement pieces 48 of the second shaft portions 38 are formed in the extending direction K1 of the elastic engagement pieces 46 of the first shaft portions 36 with respect to the leg portions 30 </ b> D. Since it inclines in the same direction (see arrow K2) and extends in the outer diameter direction of the leg portion 30D, the elastic engagement piece 46 of each first shaft portion 36 and the elastic engagement piece of each second shaft portion 38 48 can be arranged substantially evenly in the circumferential direction with respect to the mounting hole 3, and the plurality of elastic engagement pieces 46, 48 can be engaged with the back side periphery of the mounting hole 3 in a balanced manner. .

  By the way, as shown in FIG. 17, the fastener 10 </ b> D having the above structure includes, for example, outer peripheral shapes of the first shaft portions 36 and the second shaft portions 38 of the leg portions 30 </ b> D and elastic engagement pieces 46 thereof. , 48 are formed by molds S1 and S2 that divide and move in a direction perpendicular to the axis of the leg 30D. At this time, in this embodiment, the elastic engagement piece 48 of each second shaft portion 38 is in the same direction as the extending direction K1 of the elastic engagement piece 46 of the first shaft portion 36 with respect to the leg portion 30D (arrow K2). Since the leg 10D is inclined and extends in the outer diameter direction of the leg portion 30D, when the molds S1 and S2 are removed from the molded product of the fastener 10D after the fastener 10D is molded, It is possible to reduce the portion where the molded product is caught with respect to the mold drawing direction of the molds S1 and S2. As a result, the molds S1 and S2 can be easily removed from the molded leg 30D, and the manufacturing cost of the fastener 10D can be reduced.

  19 to 22 show a sixth embodiment of the fastener of the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIGS. 19-22, the fastener 10E of this embodiment differs in the structure of the leg part 30E from the said embodiment. That is, the leg portion 30E in this embodiment is disposed so as to face the radial direction of the leg portion 30E, and has a pair of first shaft portions 36 having elastic engagement pieces 46 extending in the circumferential direction of the leg portion 30E. 36 and the axial center of the leg portion 30E (center C of the leg portion 30E shown in FIG. 21), and the elastic engagement between the pair of first shaft portions 36 and 36 and the pair of first shaft portions 36 and 36. It has at least a pair of third shaft portions 39, 39 that do not have a piece.

  As shown in FIG. 21, in this embodiment, when the leg portion 30E is viewed in a cross section orthogonal to the axial direction (hereinafter, also referred to as a “cross section of the leg portion 30E”), a pair of first shaft portions 36 are provided. 36, the inner end 32 and the outer end 33 are arranged on a straight line L1 passing through the center C of the leg 30D, and the axis of the leg 30E (the leg 30E). A pair of second shaft portions 39, 39 arranged at positions that do not overlap with the pair of first shaft portions 36, 36 are adjacent to the adjacent first shaft portions 36 with the center C) therebetween. It is arranged so as to be inclined in the direction and parallel to each other. And as shown in FIG.19 and FIG.20, each 2nd axial part 39 has the structure which does not have an elastic engagement piece like the elastic engagement piece 48 of the 2nd axial part 38 in 5th Embodiment. It has become. In addition, the said 2nd axial part should just have at least one pair, and may have 2 or more pairs of 2nd axial parts. Further, in the fastener 10E of this embodiment, as shown in FIG. 22, a gap 35 that separates the pair of first shaft portions 36, 36 and the pair of second shaft portions 39, 39 includes leg portions 30E. Is formed so as to penetrate the tip end portion in the insertion direction into the mounting hole 3 in the axial direction.

  Each third shaft portion 39 is inclined in the same direction as the extending direction K1 of the elastic engagement piece 46 of the first shaft portion 36 with respect to the leg portion 30E, and extends in the outer diameter direction of the leg portion 30D. (See FIG. 21). Further, as shown in FIGS. 19 and 22, the first shaft portion 36 and the third shaft portion 39 are connected to the head portion 20.

  The fastener 10E having the above-described structure is disposed at a position that does not overlap the pair of first shaft portions 36 and 36 across the axis of the leg portion 30E, and does not have an elastic engagement piece. Since the pair of third shaft portions 39, 39 do not need to bend when the leg portion 30E is inserted into the mounting hole 3, the cross-sectional area of each third shaft portion 39 can be increased. As a result, as shown in FIG. 22, the leg portion 30 </ b> E is inserted into the attachment hole 3, and the engagement portion 43 of the elastic engagement piece 46 of each first shaft portion 36 is engaged with the rear peripheral edge of the attachment hole 3. Thus, when the shear force F3 acts on the leg 30E, the strength against the shear force F3 can be further increased. Further, since the third shaft portion 39 does not have an elastic engagement piece, the elastic engagement piece does not contact the inner periphery of the attachment hole 3 when the leg portion 30E is inserted into the attachment hole 3, and the leg portion The insertion resistance of 30E with respect to the mounting hole 3 can be lowered, and the insertion property can be improved.

  It should be noted that the present invention is not limited to the above-described embodiment, and various modified embodiments are possible within the scope of the present invention, and such an embodiment is also included in the scope of the present invention. .

DESCRIPTION OF SYMBOLS 1 Mounted member 3, 3A Mounting hole 5 Mounting member 10,10A, 10B, 10C, 10D, 10E Fastener 20 Head 30,30C, 30D, 30E Leg part 31 Shaft part 32 End part 33 on the inner peripheral side Outer peripheral side End portion 35 gap 36 first shaft portion 38 second shaft portion 39 third shaft portions 40, 46, 48 elastic engagement piece 41 end edge 43 engagement portion 50 connection portion 51 recess

Claims (8)

A fastener that is inserted into the mounting hole and mounted;
A head portion disposed on the front side of the mounting hole; and a leg portion connected to and extending from the head portion and inserted and locked into the mounting hole;
The leg portions have a plurality of shaft portions extending from the back surface of the head with a gap therebetween, and an outer diameter direction of the leg portions from at least a pair of shaft portions among the plurality of shaft portions. And / or an elastic engagement piece that extends in the circumferential direction and engages with the back side periphery of the mounting hole,
The gap separating the plurality of shaft portions is formed so as to penetrate the leg portion in the axial direction through the distal end portion in the insertion direction into the mounting hole and / or the head portion,
The gap separating the plurality of shaft portions has a shape in which the entire range on the inner peripheral side of the plurality of shaft portions is cut out with a common circle in a cross section perpendicular to the axial direction of the leg portions, The fastener according to claim 1, wherein an entire inner peripheral range of the plurality of shaft portions has an arc shape. A pair of first shaft portions, the leg portions having the elastic engagement pieces that are arranged to face the radial direction of the leg portions and extend in a circumferential direction of the leg portions;
It has at least a pair of third shaft portions that are arranged at positions that do not overlap with the pair of first shaft portions across the axis of the leg portions, and that do not have the elastic engagement pieces. The fastener according to claim 1. A fastener that is inserted into the mounting hole and mounted;
A head portion disposed on the front side of the mounting hole; and a leg portion connected to and extending from the head portion and inserted and locked into the mounting hole;
The leg portions have a plurality of shaft portions extending from the back surface of the head with a gap therebetween, and an outer diameter direction of the leg portions from at least a pair of shaft portions among the plurality of shaft portions. And / or an elastic engagement piece that extends in the circumferential direction and engages with the back side periphery of the mounting hole,
The gap separating the plurality of shaft portions is formed so as to penetrate the leg portion in the axial direction through the distal end portion in the insertion direction into the mounting hole and / or the head portion,
A pair of first shaft portions, the leg portions having the elastic engagement pieces that are arranged to face the radial direction of the leg portions and extend in a circumferential direction of the leg portions;
At least a pair of second parts, which are arranged at positions that do not overlap with the pair of first shaft parts across the axis of the leg parts and have the elastic engagement pieces extending in the outer diameter direction of the leg parts. A fastener having a shaft portion.   The fastener according to claim 1 or 3, wherein the elastic engagement piece extends from each shaft portion of the plurality of shaft portions.   The end portions on the inner peripheral side of the plurality of shaft portions and the end portions on the outer peripheral side of the plurality of shaft portions are arranged on a straight line passing through the center of the leg portion. The fastener according to one.   The fastener according to any one of claims 1 to 5, wherein an edge of the elastic engagement piece on the head side in the axial direction of the leg portion is separated from the head. The plurality of shaft portions are connected at the distal end side in the insertion direction of the leg portions by a connecting portion,
The fastener according to any one of claims 1 to 6, wherein a hollow portion is formed on the outer periphery of the connecting portion at a position aligned with a distal end portion in the insertion direction of the leg portion of the shaft portion. The elastic engagement pieces of the at least one pair of second shaft portions are inclined in the same direction as the extending direction of the elastic engagement pieces of the pair of first shaft portions with respect to the leg portions, and The fastener according to claim 3, which extends in an outer diameter direction.

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