JP2014013061A - Fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastener capable of reducing restrictions on attaching work of the fastener due to a procedure for attaching the fastener, in the attaching work of the fastener.SOLUTION: A fastener 10 comprises: a shaft member 20 in which a shaft part 21 is connected to a flange 23 on a tip side as a head; and an engaging member 30 to be locked to the shaft member 20. The engaging member 30 comprises: a first engaging part 32 to be locked to the shaft part 21 by insertion of the shaft part 21; and an elastic part 31 extending from the first engaging part 32 along a direction intersecting with a direction in which the shaft part 21 extends.

Description

  The technology of the present disclosure relates to a resin fastener that is passed through an attachment hole formed in one member and fastens the member to another member.

An example of the above-described fastener (for example, Patent Document 1) will be described with reference to FIG.
As shown in FIG. 8, the plate-like shaft portion 101 in the fastener 100 is formed integrally with a flange portion 102 having a disk shape at the base end of the plate-like shaft portion 101. The plate-like shaft portion 101 has a plate shape whose width decreases from the flange portion 102 toward the tip, and the two ends of the plate-like shaft portion 101 are sandwiched in the form of sandwiching the thickness direction of the plate-like shaft portion 101. The locking piece 103 is integrally formed. Each of the two locking pieces 103 is formed in a cantilever shape extending from the tip of the plate-like shaft portion 101 toward the outer peripheral portion of the flange portion 102. Each of the two locking pieces 103 is formed with an overhanging portion 103 a that protrudes most outward in the radial direction of the flange portion 102 in the middle of the plate-like shaft portion 101 in the axial direction.

  When the other plate member 110 is fastened to one plate member 110, first, the edges of the attachment holes H formed in each of the two plate members 110 are overlapped with each other. Next, the fastener 100 is inserted into the two attachment holes H from the tip of the plate-like shaft portion 101. At this time, the two locking pieces 103 pass through the attachment hole H while being bent toward the plate-like shaft portion 101 so that the interval between the respective base ends becomes narrow. Thereafter, when the base ends of the two locking pieces 103 pass through the attachment hole H, the bending of the two locking pieces 103 is released. As a result, the two plate members 110 are sandwiched between the projecting portion 103 a and the flange portion 102 in each of the two locking pieces 103, and the other plate member 110 is fastened to the one plate member 110. .

JP 2002-276633 A

  By the way, in the fastener 100 described above, the fastener 100 is inserted into the attachment hole H formed in the plate member 110 from the opening at one end toward the opening at the other end. Therefore, an open space for handling the fastener 100 is necessary in the space on the insertion side of the fastener 100 with respect to the plate member 110. As a result, the operation for attaching the fastener 100 to the plate member 110 places restrictions on the procedure of other operations on the plate member 110 and the structure of the plate member 110 itself so as to always open the insertion side space. For example, in the work for attaching the fastener 100, the work on the lower side of the plate member 110 is advanced prior to the attachment work so as to open the upper side of the attachment hole H formed in the plate member 110.

  The technique of this indication aims at providing the fastener which can reduce the restriction | limiting with respect to the said operation | work resulting from the attachment procedure of a fastener in the operation | work which attaches a fastener.

Hereinafter, means and effects for solving the above-described problems will be described.
One aspect of the fastener according to the present disclosure includes a shaft member having a shaft portion coupled to a head portion, and a locking member that is locked to the shaft member. The locking member includes a locking portion that is locked to the shaft portion by fitting the shaft portion, and an elastic portion that extends from the locking portion along a direction that intersects a direction in which the shaft portion extends. And comprising.

  In one aspect of the fastener in the present disclosure, the fastener is configured by a shaft member and a locking member which are different members. Then, when the shaft portion of the shaft member is fitted into the locking portion of the locking member, the locking member is locked with respect to the shaft member, and the elastic member spreading in the direction intersecting the shaft portion has the locking portion. Via the shaft. If it is such an aspect, it will become possible to attach a fastener to a fastening object in the following two ways.

  First, in one mode, the fastener is attached to the fastening object from the state in which the locking member is locked to the shaft member. That is, when the fastener is inserted into the attachment hole formed in the fastening object, the elastic portion of the locking member passes through the attachment hole while being sandwiched between the peripheral wall portion and the shaft portion of the attachment hole, and then attached. By exiting the hole, it spreads again along the direction intersecting the shaft. As a result, the fastener is attached to the fastening object in a state where the fastening object is sandwiched between the head and the elastic portion. As a result, the operation of attaching the fastener to the fastening object is completed on the side where the shaft member is inserted into the fastening object.

  On the other hand, in another mode, the fastener is attached to the fastening object from the state where the locking member is not locked to the shaft member. That is, only the shaft portion is inserted into the mounting hole in a state where the locking member is not locked. Thereafter, the locking member is appropriately locked to the shaft portion passed through the mounting hole, whereby the fastener is attached to the fastening target. As a result, the operation of attaching the fastener to the fastening object is completed on the side opposite to the side where the shaft member is inserted.

  Therefore, the manner in which the fastener is attached to the fastening object in a state where the locking member is locked to the shaft member, and the fastener is attached to the fastening object in the state where the locking member is not locked to the shaft member. Styles made available. As a result, when the fastener is attached to the fastening target, it is possible to reduce the restriction on the work due to the attachment procedure of the fastener.

In another aspect of the fastener according to the present disclosure, the elastic portion has a shape that expands toward the head.
According to another aspect of the fastener in the present disclosure, the elastic portion spreads from the locking portion toward the head, and therefore, for example, compared to a case where the elastic portion spreads toward the side opposite to the head. In the fastening object sandwiched between the elastic part and the elastic part, a portion where the object and the elastic part are in contact with each other becomes wide. Therefore, it is possible to suppress the fastener from falling off from the fastening object.

In another aspect of the fastener in the present disclosure, the elastic portion is configured by three or more elastic pieces having a plate shape, and the three or more elastic pieces extend radially from the locking portion.
According to another aspect of the fastener in the present disclosure, since the plurality of elastic pieces extend radially from the locking portion, in the fastening object sandwiched between the head and the elastic piece, the portion in contact with the elastic piece is the shaft portion. Is isotropically arranged around the center. Therefore, the effect of suppressing the fastener from falling off from the fastening object is obtained isotropically with respect to the shaft portion.

  In another aspect of the fastener according to the present disclosure, the locking portion is set as a first locking portion, and in the elastic piece, an end connected to the locking portion is set as a base end, and the elastic piece The end opposite to the base end in the extending direction is set as a tip, and the head includes a second locking portion that locks the tip of the elastic piece. The elastic piece is directed in a direction intersecting the extending direction of the shaft portion between the base end and the distal end in a state where the distal end of the elastic piece is engaged with the second engaging portion. Including an overhanging part.

  According to the other aspect of the fastener in the present disclosure, the fastening object is sandwiched between the protruding portion and the head of the elastic piece. At this time, the position of the base end of the elastic piece is determined by the first locking portion, and the position of the distal end of the elastic piece is determined by the second locking portion, so that the position of the overhanging portion itself is determined by the shaft member. It is done. Therefore, the reproducibility of the position of the elastic piece with respect to the fastening object is improved as compared with the case where the tip of the elastic piece is a free end. As a result, in the fastener attached to the fastening object, the reproducibility of the attached state is enhanced.

  In another aspect of the fastener according to the present disclosure, the shaft portion is coupled to the center of the head having a disk shape, and the second locking portion is a head formed on an outer peripheral portion of the head. A locking hole, and a fitting protrusion formed in a part of the peripheral wall of the head locking hole and protruding into the head locking hole toward the center of the head. In the elastic piece, a fitting groove into which the fitting protrusion is fitted is formed in the protruding portion.

  In another aspect of the fastener according to the present disclosure, the fitting groove formed in the elastic piece not only serves as a groove for locking the elastic piece with respect to the head, but also the fastening object between the head and the head. It is also used as a groove for sandwiching between the two. Therefore, compared to the configuration in which the elastic piece is separately provided with a portion to be locked to the head and a portion for sandwiching the fastening object with the head, these portions are configured as one groove. By doing so, it is possible to prevent the structure of the elastic piece from becoming complicated.

  In another aspect of the fastener according to the present disclosure, the locking member is formed with a locking hole through which the shaft portion passes as the first locking portion, and the locking hole is formed on the outer peripheral surface of the shaft portion. An annular groove into which the peripheral wall portion is fitted is formed.

  In another aspect of the fastener in the present disclosure, the locking member is locked to the shaft member with a simple configuration including a groove formed on the outer peripheral surface of the shaft portion and a locking hole formed in the locking member. Therefore, it is possible to suppress the complexity of these structures.

It is a disassembled perspective view which shows the disassembled perspective structure of one Embodiment which actualized the fastener in this indication. It is a perspective view which shows the perspective structure of the shaft member in one Embodiment. It is a perspective view which shows the perspective structure of the latching member in one Embodiment. It is explanatory drawing explaining the process in which the latching member in one Embodiment is latched by the shaft member. It is explanatory drawing explaining the process in which a trim board is fastened with respect to a door panel by the fastener in one Embodiment. It is explanatory drawing explaining the state by which the trim board was fastened with respect to the door panel with the fastener in one Embodiment. It is explanatory drawing explaining the state by which the fastener in one Embodiment is extracted from a door panel. It is a perspective view which shows the perspective structure of the conventional fastener.

  Hereinafter, an embodiment in which the fastener according to the present disclosure is embodied as a fastener for attaching a trim board to a door panel will be described with reference to FIGS. 1 to 7. First, the whole structure of a fastener is demonstrated with reference to FIG.

  As shown in FIG. 1, the fastener 10 includes a shaft member 20 and a locking member 30 that is locked to the shaft member 20. Various synthetic resins are used as the material for forming the shaft member 20 and the locking member 30. If it is the fastener 10 which consists of such a structure, since the shaft member 20 and the latching member 30 are separate bodies, the shaft member 20 and the latching member 30 are shape | molded using a separate metal mold | die. Therefore, compared with the structure in which the shaft member 20 and the locking member 30 are integrally formed, it is possible to suppress the complexity of the mold used for manufacturing the fastener 10.

  Further, in the configuration in which the shaft member 20 and the locking member 30 are integrally formed, an undercut process is performed to release the undercut portion formed by the shaft member 20 and the locking member 30 being integrated. Need to do. On the other hand, in the configuration in which the shaft member 20 and the locking member 30 are separately molded, it is not necessary to perform such an undercut process.

  Note that the axial length of the shaft member 20 is often 2 cm or less, and in the fastener 10 having such a size, burrs and sink marks are generated as the mold becomes complicated. Is particularly effective.

  The shaft member 20 includes a shaft portion 21 having a cylindrical shape extending along the axial direction which is one direction. A proximal end flange portion 22 having a disc shape concentric with the shaft portion 21 is formed integrally with the shaft portion 21 at the proximal end which is the upper end of the shaft portion 21. Further, on the distal end side of the proximal end side flange portion 22, a distal end side flange portion 23 that is concentric with the shaft portion 21 and has a disk shape larger than the proximal end side flange portion 22 is formed with the shaft portion 21. It is integrally formed. A trim board, which is one of the fastening objects, is sandwiched between the proximal flange portion 22 and the distal flange portion 23.

  A locking groove 21a is formed at the distal end of the shaft portion 21 so as to form an annular shape over the entire circumferential direction of the outer peripheral surface of the shaft portion 21. A shaft apex 21b is defined by a locking groove 21a.

  The locking member 30 includes an elastic portion 31 composed of four elastic pieces 31a having a cantilever shape, and one first locking portion 32 formed integrally with the base ends of the four elastic pieces 31a. It has. At the center of the first locking portion 32, a locking hole 32a that is a circular hole penetrating along the axial direction is formed. Each of the four elastic pieces 31a extends radially from one first locking portion 32 along a direction intersecting the axial direction, and the elastic portion 31 including the four elastic pieces 31a is one first locking portion. It has a shape that widens from 32 toward the distal flange portion 23.

  Next, a locking structure between the shaft member 20 and the locking member 30 will be described with reference to FIGS. First, a configuration in which the front end side flange portion 23 of the shaft member 20 locks the locking member 30 will be described with reference to FIG. 2. Next, a configuration in which the shaft portion 21 of the shaft member 20 locks the locking member 30. Will be described with reference to FIG. In the following, for convenience of explaining the relative positional relationship between the constituent parts constituting the shaft member 20 and the constituent parts constituting the locking member 30, it is locked on the central axis A of the shaft part 21. Each configuration will be described in a state where the center of the hole 32a is arranged.

[Shaft member 20]
As shown in FIG. 2, the head-side flange portion 23 has four head locking holes 25 penetrating the tip-side flange portion 23 along the axial direction. In the four head locking holes 25, the head locking holes 25 facing each other across the central axis A of the front end side flange portion 23 have a rotationally symmetric shape with respect to the central axis A. Each of the four head locking holes 25 is equally arranged along the circumferential direction of the front end flange portion 23.

  Each of the four head locking holes 25 is a two-stage hole extending along the axial direction, and has a shape that bends in the middle extending from the outer edge of the front end side flange portion 23 to the central axis A. The outer edge side of the tip side flange portion 23 in each of the four head locking holes 25 is one of two surfaces that divide the shaft member 20 into four equal parts while arranging each head locking hole 25 in the center in the circumferential direction. It extends in a direction orthogonal to one surface and in a direction parallel to the other surface, and the central axis A side extends in the radial direction.

  In each of the four head locking holes 25, the opening on the distal end side in the axial direction is smaller than the opening on the proximal end side in the axial direction, and the opening on the proximal end side is located on the side far from the shaft portion 21 in the radial direction. The front end side flange 23 is penetrated at the end. The opening on the distal end side in the axial direction has a shape that is rotationally symmetric with respect to the central axis A.

  In each of the four head locking holes 25, a fitting protrusion 26 constituting a second locking portion is formed. Each of the four fitting protrusions 26 is formed on the tip end side in the axial direction of the head locking hole 25, and continues to the end face on the tip end side of the tip end flange portion 23. Each of the four fitting protrusions 26 has a plate shape extending from the outer edge of the front end flange portion 23 toward the central axis A of the front end flange portion 23 along the inner surface of each head locking hole 25. ing. In each of the four fitting protrusions 26, the radially inner end surface has a circular arc shape concentric with the shaft portion 21.

  As described above, in the four head locking holes 25, the opening on the base end side penetrates the distal end flange portion 23 at the end far from the shaft portion 21 in the radial direction, and the distal end flange portion The outer edge side of 23 extends in a direction perpendicular to the one surface. Therefore, if the mold for the shaft member 20 is divided into two on the one surface, a portion surrounded by the inner surface of the head locking hole 25 and the inner end surface of the fitting projection 26 is formed. Only the part to be operated should be a slide type.

  On the other hand, in the configuration in which the end on the side far from the shaft portion 21 in the radial direction in the opening on the base end side is formed on the inner side of the outer edge of the distal end flange portion 23, the die for the shaft member 20 The part which forms the whole part enclosed by the part latching hole 25 needs to be a slide type. Therefore, according to the shapes of the head locking hole 25 and the fitting protrusion 26 as described above, it is possible to prevent the mold for the shaft member 20 from becoming complicated.

In the fitting protrusion 26, the radial length on the side surface along the portion extending in the radial direction in the head locking hole 25 is set as the fitting protrusion length R6.
Further, the axial length of the distal flange portion 23 is set as the flange thickness TF, and the axial length of the fitting protrusion 26 is set as the fitting thickness T6.

  Further, the distance between the inner end surface forming the arcuate surface at the fitting protrusion 26 and the central axis A is set as the holding diameter RH, and the distance at the end on the central axis A side in the extending direction of the fitting protrusion 26 is set. The length in the circumferential direction is set as the fitting length C6.

The outer diameter of the shaft portion 21 is slightly larger than the outer diameter of the shaft tip portion 21b and is set as the shaft portion diameter R1, and the outer diameter at the groove bottom surface of the locking groove 21a is set as the locking groove diameter RG. .
[Locking member 30]
As shown in FIG. 3, each of the four elastic pieces 31 a has a rotationally symmetric shape with respect to the central axis A, and is equally arranged along the circumferential direction of the first locking portion 32. Each of the four elastic pieces 31a has a curvature that is curved in a bow shape from the first locking portion 32 and is convex outward in the radial direction.

  Each of the four elastic pieces 31a has a band shape that gradually increases in thickness from the first locking portion 32 toward the tip of the elastic piece 31a, and each tip has a diameter with the first locking portion 32 as a fixed end. It has a thickness that can be bent inward in the direction. At the tip of each of the four elastic pieces 31a, one fitting groove 33 that is recessed from the outer surface of the elastic piece 31a toward the inside in the radial direction is formed over the entire circumferential direction of the elastic piece 31a. Yes.

  The groove depth R3 in the fitting groove 33 is substantially equal to the fitting protrusion length R6 in the fitting protrusion 26, and the groove width T3 in the fitting groove 33 is greater than the fitting thickness T6 in the fitting protrusion 26. Is also big.

Further, the groove length C3 that is the circumferential length of the fitting groove 33 is substantially equal to the fitting length C6 of the fitting protrusion 26.
Of the groove side walls of the fitting groove 33, the groove side wall thickness TT on the distal end side of the elastic piece 31a is sufficiently smaller than the flange thickness TF, and the fitting thickness T6 varies from the flange thickness TF. It is sufficiently smaller than the subtracted difference value.

  And the locking hole diameter R2 which is an internal diameter in the locking hole 32a of the 1st locking part 32 is smaller than the shaft part diameter R1 in the shaft part 21, and larger than the locking groove diameter RG in the locking groove 21a. .

  Next, a process of locking the locking member 30 with respect to the shaft member 20 will be described with reference to FIG. In FIG. 4, the locking member 30 before being locked to the shaft member 20 is indicated by a two-dot chain line, and the locking member 30 after being locked to the shaft member 20 is indicated by a solid line. Yes.

  As shown in FIG. 4, first, the locking member 30 is pushed into the shaft member 20 in the direction of the arrow while the tip of the shaft point portion 21 b expands the locking hole 32 a of the first locking portion 32. Then, when the base end of the shaft apex portion 21b passes through the locking hole 32a, the peripheral wall of the locking hole 32a is fitted into the locking groove 21a, and the locking member 30 is locked to the shaft member 20. When the peripheral wall of the locking hole 32a is fitted into the locking groove 21a, each of the four elastic pieces 31a is bent toward the inside in the radial direction, and the tip of each of the four elastic pieces 31a is connected to the head. It passes through the inside of the head locking hole 25 from the opening on the distal end side in the stop hole 25. Then, the force that bends each of the four elastic pieces 31 a is released, so that each of the four fitting protrusions 26 is fitted into the fitting groove 33.

  At this time, among the groove side walls constituting the fitting groove 33, the gap between the tip side wall and the tip flange portion 23 in the axial direction is obtained by subtracting the fitting thickness T6 from the groove width T3. A gap is formed in the axial direction. In the elastic piece 31a, the groove side wall 33W on the tip end side in the axial direction of the groove side walls of the fitting groove 33 projects in a direction perpendicular to the extending direction of the shaft part 21, that is, functions as a projecting part. To do. Therefore, in more detail, the door panel which is the other fastening object is sandwiched between the distal end flange portion 23 and the elastic piece 31a by the gap between the distal end side surface of the distal end side flange portion 23 and the groove side wall 33W. A gap is formed.

  In such a locked state, the position of the base end of the elastic piece 31a is determined by the first locking portion 32, and the position of the distal end of the elastic piece 31a is the fitting protrusion that constitutes the second locking portion. 26. Therefore, the position of the groove side wall 33 </ b> W that is the overhanging portion itself is determined by the shaft member 20. Therefore, the reproducibility of the position of the elastic piece 31a with respect to the fastening object is improved as compared with the case where the tip of the elastic piece 31a is a free end. As a result, in the fastener 10 attached to the fastening object, the reproducibility of the attached state is enhanced.

  Further, the fitting groove 33 formed in each elastic piece 31 a is not only a groove for locking the locking member 30 with respect to the shaft member 20, but also an object between the front end side flange portion 23. It is also used as a groove for sandwiching. Therefore, compared with the structure in which the elastic piece 31a is separately provided with the part for latching with respect to the shaft member 20, and the part for pinching | interposing a fastening object, these parts are made into one groove | channel. By comprising, it can suppress that the metal mold | die used for the structure of the locking member 30 and formation of the locking member 30 becomes complicated.

  Since the four elastic pieces 31 a extend radially from the first locking portion 32, in the door panel sandwiched between the distal end flange portion 23 and the elastic piece 31 a, the portion in contact with the elastic piece 31 a is centered on the shaft portion 21. Isotropically arranged. Therefore, the effect of suppressing the fastener 10 from falling off the door panel is obtained isotropically in the circumferential direction of the shaft portion 21.

[Operation of fastener 10]
Next, the operation of the fastener 10 when fastening the trim board to the door panel will be described with reference to FIGS.

  As shown in FIG. 5, a trim board TB is attached in advance between the proximal flange portion 22 and the distal flange portion 23. Further, the door panel P fastened by the fastener 10 is formed with an attachment hole H, and the inner diameter of the attachment hole H is substantially the same as the holding diameter RH defined by the fitting protrusion 26.

  First, from the state in which the locking member 30 is locked to the shaft member 20, the shaft apex 21 b that is the tip of the fastener 10 is inserted into the mounting hole H of the door panel P. When the shaft portion 21 passes through the attachment hole H partway in the axial direction, the outer surfaces of the four elastic pieces 31a touch the edge of the attachment hole H. As a result, each of the four elastic pieces 31a is pushed inward in the radial direction by the edge of the mounting hole H and bent inward in the radial direction, and due to such bending, the tip of the elastic piece 31a becomes radially inward, and , It is displaced toward the base end side in the axial direction.

  Since the outer surface of the elastic piece 31a is in contact with the edge of the attachment hole H, the locking member 30 itself becomes the distal end flange portion 23 as the edge of the attachment hole H approaches the distal end flange portion 23. Defeated towards. However, such pressing against the locking member 30 is regulated by the locking of the locking member 30 with respect to the locking groove 21a.

  At this time, as described above, the thickness TT of the groove side wall on the distal end side of the elastic piece 31a among the groove side walls of the fitting groove 33 is a difference value obtained by subtracting the fitting thickness T6 from the flange thickness TF. Small enough than. Therefore, even when the tips of the four elastic pieces 31a are displaced as described above, the tips of the elastic pieces 31a abut against the trim board TB, and the abutment between the tips of the elastic pieces 31a and the trim board TB results in: This prevents the elastic piece 31a from being displaced and prevents this. As a result, it is difficult to attach the fastener 10 to the door panel P, and the elastic piece 31a is pressed against the trim board TB, thereby preventing an excessive load from being applied to the elastic piece 31a.

  As shown in FIG. 6, when the fastener 10 is further inserted into the attachment hole H, the front end side surface of the front end side flange portion 23 comes into contact with the base end side surface of the door panel P. Here, as described above, the diameter of the attachment hole H is substantially equal to the holding diameter RH. Further, the groove width T3 in the fitting groove 33 is substantially equal to the sum of the fitting thickness T6 in the fitting protrusion 26 and the thickness of the door panel P. Therefore, when the force that bends the elastic piece 31 a radially inward is released, the fitting protrusion 26 and the door panel P are sandwiched between the fitting grooves 33. As a result, the fastener 10 fastens the trim board TB to the door panel P.

  As shown in FIG. 7, when the fastener 10 is pulled out from the door panel P, the distal end side surface of the distal end side flange portion 23 is separated from the proximal end side surface of the door panel P. At this time, of the groove side walls constituting the fitting groove 33, the groove side wall 33W on the tip side in the axial direction is pushed by the door panel P toward the tip side in the axial direction. On the other hand, the groove side wall on the proximal end side in the axial direction among the groove side walls constituting the fitting groove 33 is restricted from being displaced toward the distal end side in the axial direction by contact with the fitting protrusion 26. As a result, the groove side wall 33W on the distal end side in the axial direction is displaced toward the distal end side in the axial direction and radially inward. Then, each of the four elastic pieces 31a bends inward in the radial direction, whereby the trim board TB is extracted from each of the four fitting grooves 33.

  In the above-described fastening mode, the fastener 10 is attached to the trim board TB from the state where the locking member 30 is locked to the shaft member 20. That is, when the fastener 10 is inserted into the attachment hole H formed in the trim board TB, the elastic piece 31a of the locking member 30 is attached to the attachment hole H while being sandwiched between the peripheral wall portion of the attachment hole H and the shaft portion 21. By passing through the inside of H and then exiting from the attachment hole H, it spreads again along the radial direction perpendicular to the shaft portion 21. Thereby, in the trim board TB, the fastener 10 is attached to the trim board TB in a state where the trim board TB is sandwiched between the front end side flange part 23 and the elastic part 31. As a result, in the operation of attaching the fastener 10 to the trim board TB, the space handled by the fastener 10 is completed on the side where the shaft member 20 is inserted into the trim board TB.

  On the other hand, if it is the structure mentioned above, the fastener 10 may be attached to the trim board TB from the state in which the locking member 30 is not locked to the shaft member 20 as another mode. That is, after the shaft portion 21 is inserted into the mounting hole H, the locking member 30 is locked to the shaft portion 21 that has come out of the mounting hole H, whereby the fastener 10 is attached to the trim board TB. As a result, the operation of attaching the fastener 10 to the trim board TB is completed on the side opposite to the side where the shaft member 20 is inserted into the trim board TB. Therefore, when the fastener 10 is attached to the trim board TB, it is possible to reduce restrictions on the operation due to the direction in which the fastener 10 is attached.

As described above, according to the embodiment, the effects listed below can be obtained.
(1) From the state where the locking member 30 is locked to the shaft member 20, the fastener 10 is attached to the door panel P, or from the state where the locking member 30 is not locked to the shaft member 20, the door panel P The fastener 10 is attached to the. Therefore, when the fastener 10 is attached to the door panel P, it is possible to reduce restrictions on the operation caused by the attachment procedure of the fastener 10.

  (2) Since the shaft member 20 and the locking member 30 are molded using different molds, the fastener 10 is manufactured as compared with the configuration in which the shaft member 20 and the locking member 30 are molded integrally. It is possible to prevent the mold used for the process from becoming complicated.

  (3) When a part of the elastic piece 31a is damaged at the time of attachment, the function as the fastener 10 can be obtained by replacing the locking member 30, and therefore, it is necessary to replace all of the fastener 10. There is no. Similarly, when a part of the shaft portion 21 is damaged at the time of attachment, the function as the fastener 10 is obtained by replacing the shaft member 20, and this also replaces all the fasteners 10. There is no need to do.

  (4) The four elastic pieces 31 a have a shape that extends from the first locking portion 32 toward the distal end flange portion 23. Therefore, for example, compared with the case where the four elastic pieces 31a expand toward the side opposite to the front end side flange portion 23, the elastic portion is formed by the door panel P sandwiched between the front end side flange portion 23 and the elastic portion 31. The part in contact with 31 becomes wider. As a result, the fastener 10 can be further prevented from falling off the door panel P.

  (5) Since the four elastic pieces 31a extend radially from the first locking portion 32, in the door panel P sandwiched between the distal end flange portion 23 and the elastic piece 31a, the portion in contact with the elastic piece 31a serves as the shaft portion 21. Isotropically placed as the center. Therefore, the fastener 10 is prevented from falling off the door panel P isotropically with respect to the shaft portion 21.

  (6) Compared to the configuration in which the front end flange portion 23 is a plurality of plate members extending radially from the shaft portion 21, for example, the front end side flange portion 23 is used for forming the shaft member 20 because of its simple structure. It is possible to suppress the complexity of the mold to be used.

  (7) Since the position of the base end of the elastic piece 31a is determined by the locking groove 21a, and the position of the tip of the elastic piece 31a is determined by the fitting protrusion 26, the position itself of the groove side wall 33W serving as the overhanging portion Is defined by the shaft portion 21. Therefore, the reproducibility of the position of the elastic piece 31a with respect to the door panel P is enhanced as compared with the case where the tip of the elastic piece 31a is a free end. As a result, in the fastener 10 attached to the door panel P, the reproducibility of the attached state is enhanced.

  (8) The fitting groove 33 formed in the elastic piece 31 a not only serves as a groove for locking the locking member 30 with respect to the shaft member 20, but also places an object between the front end side flange portion 23. Since it is used also as a groove | channel for pinching, it can suppress that the metal mold | die used for formation of the locking member 30 becomes complicated.

  (9) The peripheral wall of the locking hole 32 a formed in the first locking portion 32 is fitted into the locking groove 21 a formed in the shaft member 20. As a result, the locking member 30 is locked to the shaft member 20. With such a configuration, the complexity of the structure of the shaft member 20 and the locking member 30 can be suppressed, and the mold used for forming the shaft member 20 and the locking member 30 can be suppressed from becoming complicated.

(10) Since the shaft apex portion 21b is formed at the tip of the shaft portion, the shaft portion 21 can easily pass through the locking hole 32a. Thereby, the fastener 10 becomes easy to assemble.
In addition, the said embodiment can be changed and implemented suitably as follows.

The distal end flange portion 23 may have a polygonal shape such as a triangular plate shape or a rectangular plate shape, for example.
The head may be configured by a plurality of plate members that extend radially from the shaft portion 21 along the radial direction of the shaft portion 21.

  The first locking portion 32 is formed in a cylindrical shape over substantially the entire shaft portion 21 in the axial direction, and the elastic piece 31a extends outward from the outer peripheral surface of the first locking portion 32 along the radial direction. You may make the plate shape over the whole axial direction in the 1 latching | locking part 32. As shown in FIG. In short, the elastic part 31 should just be a shape which spreads from the 1st latching | locking part 32 along the direction which cross | intersects the direction where the axial part 21 is extended.

-The base end side flange part 22 may be omitted. In this case, the distal end side flange portion 23 as the head portion may be formed at the proximal end of the shaft portion 21.
The proximal end flange portion 22 may be formed between the proximal end of the shaft portion 21 and the distal end flange portion 23.

The proximal end flange portion 22 may have a polygonal plate shape such as a triangular plate shape or a rectangular plate shape, for example.
The head locking hole 25 may have a shape extending in the radial direction from the outer edge of the distal end flange portion 23 toward the central axis A. In this case, the fitting protrusion 26 only needs to have a plate shape extending in the radial direction from the outer edge of the distal end flange portion 23 toward the central axis A. And if the metal mold | die of the shaft member 20 is a structure divided | segmented into 4 including the formation site | part of the one head latching hole 25, the inner surface of the head latching hole 25 will be similar to the said embodiment. And only a portion forming a portion surrounded by the inner end face of the fitting protrusion 26 may be a slide type.

  In the opening on the proximal end side in the axial direction in the head locking hole 25, the end portion on the side far from the shaft portion 21 in the radial direction may be formed inside the outer edge of the distal end flange portion 23. In this case, each fitting protrusion 26 protrudes from the outer wall portion in the radial direction of the shaft portion 21 toward the central axis A of the distal end side flange portion 23 in the peripheral wall portion of the head locking hole 25. That's fine. The radial length of the head locking hole 25 is such that the fitting protrusion length R6 is equal to or greater than the groove depth R3 without shortening the radial length of the proximal end opening. It is preferable to set to. In such a configuration, in the radial direction, the fitting protrusion 26 and the elastic piece 31a are in contact with each other by the groove depth R3. Therefore, the length of contact between the fitting protrusion 26 and the elastic piece 31a is the groove depth. The locking member 30 is easily locked to the shaft member 20 as compared with the configuration smaller than the length R3.

  The fitting protrusion length R6 may be smaller than the groove depth R3. Even in such a configuration, since the fitting protrusion 26 is fitted into the fitting groove 33 of the elastic piece 31a to a certain extent, compared to the configuration in which the tip of the elastic piece 31a is a free end, the elasticity to the fastening target is increased. The reproducibility of the position of the piece 31a can be improved.

The number of the head locking holes 25 may be larger than the number of the elastic pieces 31a, and the head locking holes 25 may be formed over substantially the entire circumferential direction of the front end side flange portion 23.
-The elastic piece 31a may be formed separately in a portion that is locked to the distal flange portion 23 and a portion that sandwiches the object to be clamped between the distal flange portion 23.

-The overhang | projection part in the elastic piece 31a is not restricted to the groove side wall 33W of the fitting groove 33, and may be a part between the groove side wall 33W of the fitting groove 33 and the first locking part 32.
A fitting groove may be formed in the first locking portion 32, and a fitting portion that is fitted into the fitting groove may be formed at the tip of the shaft portion 21. The fitting portion can be embodied as, for example, a plurality of protrusions extending radially from the outer surface of the shaft portion 21 toward the outer side in the radial direction. In this case, the fitting groove can be fitted into the fitting portion, and the fitting portion fitted in the fitting groove rotates in the circumferential direction so that the fitting portion is locked by the fitting groove. The configuration may be made.

-The axial part 21 does not need to comprise the column shape, and may comprise the polygonal column shape. In short, it may be a columnar shape extending in one direction.
The shaft apex portion 21b does not have to be conical, and when the shaft portion 21 has a polygonal column shape, it has a cone shape having a bottom surface having the same shape as the cross section of the shaft portion 21 in the plane orthogonal to the axial direction. There may be. Or you may comprise the cone shape which has the bottom face of the shape different from the same cross section in the axial part 21. FIG. In short, it is only necessary to form a cone shape when viewed from the distal end side of the shaft portion 21.

  The shaft tip 21 b does not have to be formed at the tip of the shaft portion 21, and the outer diameter of the shaft portion 21 is the locking groove 21 a as long as the locking groove 21 a is formed in the shaft portion 21. It may be the same from the distal end to the proximal end.

  -The locking hole 32a does not need to be a circular hole, and when the shaft portion 21 has a polygonal column shape, it may be a through-hole having the same shape as the cross section of the shaft portion 21 in a plane orthogonal to the axial direction. Or the through-hole of the shape different from the same cross section in the axial part 21 may be sufficient.

  The locking member 30 is not limited to the configuration including the four elastic pieces 31a, and may be any configuration including two or more elastic pieces 31a. In this case, the number of the head locking holes 25 may be more than the number of the elastic pieces 31a. In addition, if the elastic piece 31a is the structure provided with the 3 or more elastic pieces 31a, and these elastic pieces 31a are the structures extended radially from the 1st latching | locking part 32, according to said (5). An effect can be obtained.

  Each of the plurality of elastic pieces 31a is a free end whose distal end is not locked to the distal flange portion 23, and has a cantilever shape whose base end is connected to the first locking portion. May be done.

  A: central axis, H: mounting hole, P: door panel, C3: groove length, C6: fitting length, R1: shaft diameter, R2: locking hole diameter, R3: groove depth, R6: fitting protrusion length , RG ... locking groove diameter, RH ... holding diameter, T3 ... groove width, T6 ... fitting thickness, TB ... trim board, TF ... flange thickness, TT ... thickness, 10 ... fastener, 20 ... shaft member 21 ... Shaft portion, 21a ... Locking groove, 21b ... Shaft apex portion, 22 ... Base end side flange portion, 23 ... Front end side flange portion, 25 ... Head locking hole, 26 ... Fitting projection, 30 ... Locking member, 31 ... elastic part, 31a ... elastic piece, 32 ... first locking part, 32a ... locking hole, 33 ... fitting groove, 33W ... groove side wall, 100 ... fastener, 101 ... plate-like shaft part , 102 ... flange part, 103 ... locking piece, 103a ... projecting part, 110 ... plate member.

Claims (6)

A shaft member having a shaft connected to the head;
A locking member locked to the shaft member,
The locking member is
A locking portion locked to the shaft portion by fitting the shaft portion;
An elastic portion extending from the locking portion along a direction intersecting with the extending direction of the shaft portion;
Fastening with. The fastener according to claim 1, wherein the elastic portion has a shape that expands toward the head. The elastic part is composed of three or more elastic pieces having a plate shape,
The fastener according to claim 2, wherein the three or more elastic pieces extend radially from the locking portion. The locking portion is set as a first locking portion;
In the elastic piece,
An end connected to the locking portion is set as a base end,
An end opposite to the base end in the extending direction of the elastic piece is set as a tip,
The head includes a second locking portion that locks the tip of the elastic piece,
The elastic piece is stretched in a direction intersecting the extending direction of the shaft portion between the base end and the distal end in a state where the distal end of the elastic piece is engaged with the second engagement portion. The fastener according to claim 3, further comprising an overhanging portion. The shaft portion is
Connected to the center of the head in the form of a disk,
The second locking portion is
A head locking hole formed in the outer periphery of the head;
A fitting protrusion formed on a part of the peripheral wall portion of the head locking hole and protruding into the head locking hole toward the center of the head; and
In the elastic piece,
The fastener according to claim 4, wherein a fitting groove into which the fitting protrusion is fitted is formed in the protruding portion. In the locking member, a locking hole through which the shaft portion passes is formed as the first locking portion,
The fastener according to claim 4 or 5, wherein an annular groove into which the peripheral wall portion of the locking hole is fitted is formed on the outer peripheral surface of the shaft portion.

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