JP4942724B2 - Fastening parts and annular spacer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide fastening components which make alignment between spacers easy without making a method of adjusting interval complicated and increasing a manufacturing cost. <P>SOLUTION: The fastening components, which consist of a plurality of annular spacer 200 arranged in superposition between both fastened objects when a first fastened object 2 and a second fastened object 3 are connected and a bush 100 having a collar 110 passing through an annular spacer 200 by penetrating the first fastened object 2, and fastens the first fastened object 2 and the second fastened object 3 with a screw 4 penetrating the collar 110 and the annular spacer 200. The annular spacer 200 is equipped with: a projection 210 provided in one side surface 201; an insertion hole 220 allowing the projection 210 of the annular spacer 200 adjacently arranged at the other side surface 202 to be inserted thereto; and a burying hole 240 which is provided at the other side surface 202 side and buries the projection 210 by a pushing pressure at the time of fastening. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a fastening part and an annular spacer, and more particularly, to an improvement of a fastening part including an annular spacer used to adjust a distance between fastened objects.

  When the heat sink is screwed to the substrate or the circuit board is screwed to the housing of the electronic device, an annular spacer is used to adjust the distance between these objects to be fastened. In order to obtain a desired distance between the objects to be fastened, a spacer having a desired thickness may be used, or a plurality of spacers having the same thickness may be stacked to obtain a desired thickness.

  Such a spacer is required to have a simple method for adjusting the interval and to be low in cost. However, it is expensive to prepare spacers having different thicknesses in order to cope with various intervals. In addition, it is possible to reduce the types of spacers by using such spacers in combination, but it is troublesome to combine different types of spacers. On the other hand, in the method in which spacers having the same thickness are overlapped to obtain a desired thickness, there is a problem that lateral displacement is likely to occur when the spacers are overlapped, and alignment between the spacers is not easy.

  Therefore, in order to prevent lateral displacement when the spacers are overlapped, the spacer is provided with a protrusion protruding from one surface of the spacer and an insertion hole for inserting a protrusion of another spacer arranged adjacent to the other surface side. It is possible. However, although the alignment between the spacers is facilitated by fitting the protrusions into the insertion holes, there is a problem that an error occurs in the spacing adjustment due to the protrusions of the uppermost spacer arranged adjacent to the object to be fastened.

Patent Document 1 discloses a technique for adjusting the interval between members by using a combination of two rings having different thicknesses in a stepped manner. In Patent Document 1, the interval is adjusted by rotating two opposed rings in the circumferential direction relatively. However, alignment between the rings is not easy, and it is complicated to obtain a desired interval by rotating in the circumferential direction.
JP 2007-278421 A

  The present invention has been made in view of the above circumstances, and a fastening part and an annular shape that facilitate alignment between spacers without complicating the method of adjusting the spacing and without increasing the manufacturing cost. An object is to provide a spacer. In particular, it is an object of the present invention to provide a fastening part and an annular spacer that facilitate positioning when overlapping annular spacers having the same thickness to obtain a desired thickness. It is another object of the present invention to provide a fastening part and an annular spacer that facilitate alignment of spacers without causing an error in adjusting the distance between fastened objects.

  The fastening component according to the first aspect of the present invention includes two or more annular spacers arranged in a state of being overlapped between both fastened objects when the first fastened object and the second fastened object are fastened, and the first fastened object. The bush includes a collar portion that passes through the fastener and is inserted into the annular spacer, and the first and second fasteners are fastened by screws that penetrate the collar portion and the two or more annular spacers. The annular spacer includes a protruding portion provided on one surface, an insertion hole for inserting the protruding portion of the annular spacer disposed adjacent to the other surface, and the other surface side. And an embedment hole for burying the protruding portion by a pressing force at the time of fastening.

  According to such a configuration, since the annular spacer has the protruding portion provided on one surface and the insertion hole for inserting the protruding portion of the annular spacer disposed adjacent to the other surface side, the protruding portion is inserted. Positioning between the spacers can be facilitated by fitting into the holes. Also, since the other surface side of the annular spacer is provided with an embedment hole for burying the projecting portion by the pressing force at the time of fastening, the projecting portion of the annular spacer disposed adjacent to the article to be fastened is connected to the object to be fastened. It can be made to be buried by being moved to the burial hole side by the pressing force from. Therefore, it can suppress that the protrusion part of the annular spacer arrange | positioned adjacent to a to-be-fastened object produces an error in the space | interval adjustment between to-be-fastened objects.

  In addition to the above configuration, the fastening component according to the second aspect of the present invention is configured such that the thickness around the protruding portion is a thickness that can be broken by the pressing force. According to such a structure, when the protrusion receives a pressing force from the article to be fastened, the periphery of the protrusion can be broken.

  A fastening component according to a third aspect of the present invention is configured such that, in addition to the above-described configuration, the annular spacer includes a thin portion that is thinner than the space between the one surface and the bottom surface of the buried hole around the protruding portion. Is done. According to such a configuration, since the thin portion with a reduced thickness is provided around the protruding portion, it is easy to break the periphery of the protruding portion when the protruding portion receives a pressing force from the article to be fastened. be able to.

  The fastening component according to the fourth aspect of the present invention is configured such that an annular groove surrounding the protruding portion is formed in addition to the above configuration. According to such a configuration, since the thin portion is formed by the annular groove surrounding the protruding portion, the periphery of the protruding portion can be easily broken.

  The fastening component according to the fifth aspect of the present invention is configured such that, in addition to the above configuration, the thickness of the protruding portion is thinner than the depth of the buried hole. According to such a configuration, the thickness of the periphery of the protruding portion is sufficiently thinner than the thickness of the annular spacer. Therefore, when the protruding portion receives a pressing force from the object to be fastened, the periphery of the protruding portion is broken. Can be made easier.

  The fastening component according to a sixth aspect of the present invention includes, in addition to the above configuration, the insertion hole is a through-hole, and the insertion hole of the annular spacer disposed adjacent to the other surface is opposed to the buried hole. An annular spacer is disposed, and a rib for locking the protrusion is provided on the inner surface of the insertion hole. According to such a configuration, since the insertion hole is a through-hole, alignment when the protrusion is fitted into the insertion hole of the adjacent annular spacer is facilitated. In addition, each annular spacer is disposed so that the insertion hole of the annular spacer disposed adjacent to the other surface faces the buried hole, but the inner surface of the insertion hole is provided with a rib for locking the protrusion. Therefore, it can suppress that the protrusion part fractured | ruptured at the time of fastening falls out from an insertion hole.

  The fastening component according to the seventh aspect of the present invention is configured such that, in addition to the above configuration, the rib is formed in the central axis direction of the annular spacer. According to such a configuration, since the rib on the inner surface of the insertion hole is formed in the central axis direction, it can be easily processed when the annular spacer is molded using the mold.

  An annular spacer according to an eighth aspect of the present invention is an annular spacer used in a state in which two or more are overlapped, and includes a protrusion provided on one surface and an annular spacer disposed adjacent to the other surface. An insertion hole for inserting the protruding portion and an embedment hole provided on the other surface side for burying the protruding portion by a pressing force at the time of fastening are configured.

  According to the fastening component and the annular spacer according to the present invention, since the projection has a protrusion provided on one surface of the annular spacer and an insertion hole for inserting the protrusion of the annular spacer disposed adjacent to the other surface, the protrusion Positioning between the spacers can be facilitated by fitting the portion into the insertion hole. Therefore, the positioning between the spacers is facilitated when the annular spacers having the same thickness are overlapped to obtain a desired thickness without complicating the method of adjusting the spacing and without increasing the manufacturing cost. be able to.

  Also, since the other surface side of the annular spacer is provided with an embedment hole for burying the projecting portion by the pressing force at the time of fastening, the projecting portion of the annular spacer disposed adjacent to the article to be fastened is connected to the object to be fastened. It can be made to be buried by being moved to the burial hole side by the pressing force from. Accordingly, the protrusion of the annular spacer disposed adjacent to the object to be fastened can suppress an error in adjusting the distance between the objects to be fastened. In addition, it is possible to realize a fastening part and an annular spacer that facilitate alignment between the spacers.

Embodiment 1 FIG.
<Fastening parts>
FIG. 1 is a perspective view showing an example of a schematic configuration of a fastening part according to Embodiment 1 of the present invention, and shows a state before fastening of a fastening part 1 including a bush 100 and two annular spacers 200. FIG. . The annular spacer 200 is an annular part that is used to adjust the interval between the two objects to be fastened when the two objects to be fastened are disposed, and is arranged in a state of being overlapped between the two objects to be fastened.

  The bush 100 includes a collar portion 110 that passes through the first object to be fastened from the side opposite to the annular spacer 200 and is inserted into the annular spacer 200, and a head portion that houses a head portion of a screw that penetrates the collar portion 110 during fastening. It is a component having a pedestal portion 120 in which a housing hole 130 is formed.

  The collar portion 110 has a cylindrical shape, and the annular spacer 200 is mounted so that the outer peripheral surface thereof overlaps the inner peripheral surface of the annular spacer 200.

  The annular spacer 200 is disposed adjacent to one surface, here, two protrusions 210 provided on the surface on the first object side, and on the other surface side, that is, the second object side. Two insertion holes 220 for inserting the protrusions 210 of the annular spacer 200 to be inserted, and the burying holes provided on the second object to be fastened and for burying the protrusions 210 pressed by the first object to be fastened at the time of fastening. 240.

  The protruding portion 210 is a columnar protrusion for preventing a lateral shift when the annular spacers 200 are overlapped, and protrudes in a direction parallel to the central axis of the annular spacer 200. The protruding portion 210 is inserted into the insertion hole 220 of another annular spacer 200 disposed adjacent to the first fastened object side. The insertion hole 220 is a circular through-hole penetrating the annular spacer 200, and the protrusion 210 of another annular spacer 200 disposed adjacent to the second object to be fastened is inserted.

  In this example, the projecting portion 210 and the insertion hole 220 are provided at positions that are symmetric with respect to the central axis of the annular spacer 200 and are symmetric with respect to the rotational movement around the central axis. In other words, the two protrusions 210 are provided at positions 180 degrees rotationally symmetric with respect to the central axis. In addition, the two insertion holes 220 are provided at positions where each protrusion 210 is rotated by a predetermined amount around the central axis, in this example, 90 degrees.

  Here, it is assumed that each annular spacer 200 is arranged with the surface on which the protruding portion 210 is formed facing the bush 100, and the second spacer on the second object side is the annular object on the first object side. It is arranged to be rotated 90 degrees around the central axis with respect to the spacer.

<Bush>
FIG. 2 is a plan view showing a configuration example of the bush 100 in the fastening component 1 of FIG. FIG. 3 is a cross-sectional view showing a configuration example of the bush 100 in the fastening part 1 of FIG. 1, and shows a cut surface taken along the line AA of FIG. The bush 100 includes a collar portion 110 and a pedestal portion 120, and a screw hole 121 through which a screw passes is formed in the central portion.

  At the time of fastening, the screw head is locked by the bottom surface 131 of the head receiving hole 130. The outer diameter L <b> 2 of the collar part 110 is smaller than the outer diameter L <b> 1 of the pedestal part 120. By fitting the collar portion 110 into the annular spacer 200 so that the outer peripheral surface 111 of the collar portion 110 and the inner peripheral surface of the annular spacer 200 overlap, the annular spacer 200 is attached to the bush 100.

  Here, it is assumed that the bush 100 is formed of a synthetic resin having high insulation and heat resistance. For example, it is made of PBT (polybutylene terephthalate) resin or PPS (polyphenylene sulfide) resin to which a filler is added.

<Annular spacer>
FIG. 4 is a plan view showing a configuration example of the annular spacer 200 in the fastening component 1 of FIG. FIG. 5 is a cross-sectional view showing a configuration example of the annular spacer 200 in the fastening part 1 of FIG. 1, and shows a cut surface taken along the line BB of FIG. 4. In the annular spacer 200, two protrusions 210 and two insertion holes 220 are formed on a thin annular plane plate, and one or two or more are used depending on the interval between the objects to be fastened. The

  An inner diameter L5 of the annular spacer 200 into which the collar portion 110 of the bush 100 is fitted substantially coincides with an outer diameter L2 of the collar portion 110, and a rib 231 for preventing falling off is provided on the inner peripheral surface 230.

  The rib 231 is a linear protrusion formed in a direction parallel to the central axis of the annular spacer 200, that is, in the thickness direction. Here, it is assumed that the plurality of ribs 231 are formed so that the circumferential intervals are equal. In this example, ribs 231 are formed at intervals of 120 degrees with respect to the central axis of the annular spacer 200. By providing such a rib 231 on the inner peripheral surface 230, it is possible to prevent the annular spacer 200 fitted with the collar portion 110 from falling off in the central axis direction.

  The outer diameter L <b> 3 of the annular spacer 200 substantially matches the outer diameter L <b> 1 of the pedestal 120 of the bush 100. Since the outer diameter L3 of the annular spacer 200 and the outer diameter L1 of the pedestal 120 are substantially matched, the pressing force applied to the first object to be fastened at the time of fastening is dispersed by the bush 100, so that the first fastened The pressing force acting from the object to be fastened on each protrusion 210 of the annular spacer 200 disposed adjacent to the object can be made uniform.

  Around each protrusion 210, an annular groove 211 surrounding the protrusion 210 is formed. The annular groove 211 forms a thin portion for breaking the periphery of the protruding portion 210 by the pressing force from the first fastened object when the protruding portion 210 is pressed by the first fastened object. In addition, the annular spacer 200 is formed on the surface 201 of the first object to be fastened in the circumferential direction of the protrusion 210.

  The diameter L4 of the insertion hole 220 substantially matches the diameter L6 of the protrusion 210. A rib 221 for locking the protrusion 210 is provided on the inner surface of the insertion hole 220.

  The ribs 221 are linear ridges formed in a direction parallel to the central axis of the annular spacer 200, that is, in the thickness direction. Here, the rib 221 is formed at a position closest to the central axis of the annular spacer 200.

  By providing such ribs 221 on the inner surfaces of the respective insertion holes 220, it is possible to prevent the protrusions 210 fitted with the insertion holes 220 from falling off in the direction of the central axis. The workability at the time of mounting the annular spacer 200 on the bush 100 can be improved.

  An embedding hole 240 for embedding the protruding portion 210 pressed by the first object to be fastened at the time of fastening is provided on the surface 202 on the second object to be fastened side of the annular spacer 200. The diameter L9 of the buried hole 240 is larger than the diameter L6 of the protrusion 210. Further, the depth L10 of the buried hole 240 is larger than the height L8 from the surface 201 of the protrusion 210.

  Here, it is assumed that the height L8 of the protrusion 210 is smaller than the thickness L7 of the annular spacer 200, that is, the distance between the surfaces 201 and 202. Further, the depth L10 of the buried hole 240 may be shallower than the thickness (L8 + L7−L10) of the protrusion 210, but when the protrusion 210 is pressed from the first object to be fastened, From the viewpoint of facilitating breakage of the protrusion 210, it is desirable that the protrusion 210 be deeper than the wall thickness.

  Here, it is assumed that the annular spacer 200 is formed of a synthetic resin having high insulation and heat resistance. For example, it is formed using the same resin as the bush 100.

  FIG. 6 is an enlarged cross-sectional view showing a main part of the annular spacer 200 of FIG. 5, and shows a state around the protrusion 210. The thickness around the protrusion 210 may be a thickness that can be broken by the pressing force from the first object to be fastened.

  In this example, by providing the annular groove 211 around the protrusion 210, the distance between the surface 201 on the first fastened object side of the annular spacer 200 and the bottom surface 241 of the buried hole 240 around the protrusion 210. A thin portion having a thickness thinner than L11 is formed. The cross section of the annular groove 211 has a notch shape cut in the thickness direction of the annular spacer 200. In particular, the protruding portion 210 side is cut into a V-shaped cross section.

  If the protruding portion 210 is pressed downward by the first article to be fastened at the time of fastening, the stress concentrates on the thin portion due to the movement of the protruding portion 210 toward the buried hole 240. At that time, a force of pressing and contracting from the left and right acts on the first fastened object side, whereas a force of stretching to the left and right acts on the bottom surface 241 side of the buried hole 240. Thereby, the periphery of the protrusion 210 is broken, and the protrusion is accommodated in the buried hole 240.

  FIGS. 7A and 7B are cross-sectional views showing a state in which the annular spacer 200 of FIG. 5 is overlapped. FIG. 7A shows an annular spacer on the first fastened object side. FIG. 7B shows the periphery of the insertion hole 220 of the annular spacer 200 on the first fastened object side.

  The annular spacer 200 disposed adjacent to the lower side with respect to the first fastened object side, that is, the upper annular spacer 200, needs to be rotated 90 degrees around the central axis when overlapping.

  If the protrusion 210 and the insertion hole 220 are provided at point-symmetrical positions with respect to the central axis of the annular spacer 200 and are symmetrical with respect to the rotational movement around the central axis, the upper spacer protrusion 210 and the lower spacer The spacer insertion hole 220 always faces the insertion hole 220. Further, the insertion hole 220 of the upper spacer and the protrusion 210 of the lower spacer are necessarily opposed to each other.

  When the protrusion 210 of the lower spacer is fitted into the insertion hole 220 of the upper spacer, the protrusion 210 is difficult to be removed by the rib 221 in the insertion hole 220. Separation can be prevented.

<Fastening structure>
FIG. 8 is a cross-sectional view showing an example of a fastening structure including the fastening part 1 of FIG. 2 A fastening structure for fastening the article 3 to be fastened is shown. The first fastened object 2 is, for example, a substrate in an electronic device, and a second fastened object 3 such as a heat sink is fixed thereto.

  The connected annular spacer 200 is fitted into the collar portion 110 of the bush 100 in which the first fastened object 2 is penetrated from the side opposite to the annular spacer 200. And the 1st to-be-fastened object 2 and the 2nd to-be-fastened object 3 are fastened by screwing the screw 4 which penetrated the collar part 110 and the annular spacer 200 to the 2nd to-be-fastened object 3. The distance between the first article to be fastened 2 and the second thing to be fastened 3 is a thickness L7 × 2 of two annular spacers 200.

  FIG. 9 is an enlarged view of the main part of the fastening structure of FIG. 8, and shows a state around the protrusion 210 of the annular spacer 200 disposed adjacent to the first article 2 to be fastened. When the screw 4 is tightened during fastening, the head of the screw 4 exerts a pressing force on the bottom surface 131 of the bush 100. This pressing force is exerted on the first fastened object 2 via the bush 100 and acts on the annular spacer 200 sandwiched between the first fastened object 2 and the second fastened object 3.

  In the case of the upper annular spacer 200 disposed adjacent to the first object 2 to be fastened, the protruding portion 210 projecting from the surface 201 of the annular spacer 200 on the first object 2 side is the first object 2 to be fastened at the time of fastening. A downward pressing force is applied. With this pressing force, the periphery of the protrusion 210 is broken, and the protrusion 210 is accommodated in the buried hole 240.

  In this example, the burial hole 240 is broken from the thinnest portion on the bottom surface 241 side.

  An insertion hole 220 for the lower spacer is located immediately below the upper spacer protrusion 210, but the protrusion 210 that breaks away from the spacer by the rib 221 provided in the insertion hole 220. It is prevented from falling out of the insertion hole 220.

  According to the present embodiment, the protruding portion 210 provided with the annular spacer 200 on the one surface 201 and the insertion hole 220 into which the protruding portion 210 of the annular spacer 200 disposed adjacent to the other surface 202 side is inserted. Therefore, the alignment between the spacers can be facilitated by fitting the protrusion 210 into the insertion hole 220. Moreover, since the embedding hole 240 which embeds the protrusion part 210 with the pressing force at the time of fastening is provided in the surface 202 side of the annular spacer 200, the protrusion part 210 of the annular spacer 200 arrange | positioned adjacent to a to-be-fastened object is provided. It can be buried by being moved toward the embedding hole 240 by the pressing force from the object to be fastened. Therefore, it can suppress that the protrusion part 210 of the annular spacer 200 arrange | positioned adjacent to a to-be-fastened object produces an error in the space | interval adjustment between to-be-fastened objects.

Embodiment 2. FIG.
In the first embodiment, the example in which the annular groove 211 surrounding the protrusion 210 is provided on the surface 201 of the annular spacer 200 on the first fastened object 2 side has been described. On the other hand, this Embodiment demonstrates the case where the annular groove for forming a thin part is provided in the bottom face of an embedding hole.

  FIG. 10 is a cross-sectional view showing a configuration example of a fastening part according to Embodiment 2 of the present invention, and shows an annular spacer 400 in which an annular groove 411 is provided on the bottom surface 441 of the buried hole 440. In the annular spacer 400, an annular groove 411 that surrounds the protruding portion 410 is formed on the bottom surface 441 of the buried hole 440.

  The cross section of the annular groove 411 has a notch shape in which the bottom surface 441 is cut in the thickness direction, that is, in a direction parallel to the central axis of the annular spacer 400.

  By providing such an annular groove 411 around the protrusion 410, the distance between the surface of the annular spacer 400 on the first fastened object 2 side and the bottom surface 441 of the buried hole 440 around the protrusion 410 is larger. A thin portion having a reduced thickness can be formed.

Embodiment 3 FIG.
In the first embodiment, an example in which the annular groove 211 is provided on the surface 201 of the annular spacer 200 on the first fastened object 2 side has been described. On the other hand, this Embodiment demonstrates the case where a some through-hole is provided along an annular groove.

  FIG. 11 is a plan view showing a configuration example of a fastening part according to Embodiment 3 of the present invention, in which an annular spacer 500 in which a plurality of through holes 512 are provided along an annular groove 511 around the protrusion 510 is shown. It is shown. The through holes 512 that penetrate the annular spacer 500 in the thickness direction are arranged at equal intervals in the circumferential direction of the protrusion 510.

  By providing such a through-hole 512 in the thin part around the protrusion 510, the periphery of the protrusion 510 can be further easily broken when the protrusion 510 is pressed from the first article 2 to be fastened.

  In Embodiments 1 to 3, the annular spacer is provided with two protrusions and two insertion holes, each of which is a point-symmetrical position with respect to the central axis of the annular spacer, and symmetrical with respect to the rotational movement around the central axis. Although an example in the case of being provided at various positions has been described, the present invention is not limited to this. For example, one having one protrusion and one insertion hole, or three or more each may be provided.

  12 (a) to 12 (c) are plan views showing a configuration example of a fastening part according to another embodiment of the present invention, in which annular spacers 600 to 800 are shown. FIG. 12A shows a case where one protrusion 610 and one insertion hole 620 are provided in the annular spacer 600. The protrusion 610 and the insertion hole 620 are provided at positions that are point-symmetric with respect to the central axis of the annular spacer 600.

  An annular groove 611 surrounding the protrusion 610 is formed around the protrusion 610. In addition, a rib 621 for preventing dropout is provided on the inner surface of the insertion hole 620 into which the protruding portion 610 of another annular spacer 600 arranged adjacent to the insertion hole 620 is inserted.

  FIG. 12B shows a case where two protrusions 710 and two insertion holes 720 are provided at positions symmetrical with respect to the central axis of the annular spacer 700. The two protrusions 710 are formed at positions rotated by an angle θ in opposite directions. Further, the two insertion holes 720 are formed at positions where the respective protrusions 710 are rotated and moved by 180 degrees around the central axis.

  An annular groove 711 surrounding the protrusion 710 is formed around the protrusion 710. In addition, a rib 721 for preventing the drop-out is provided on the inner surface of the insertion hole 720 into which the protruding portion 710 of another annular spacer 700 disposed adjacently is inserted.

  FIG. 12C shows a case where three projecting portions 810 and three insertion holes 820 are provided at positions that are point-symmetric with respect to the central axis of the annular spacer 800. The three protrusions 810 are formed every 120 degrees around the central axis. Further, the three insertion holes 820 are formed at positions where the respective protrusions 810 are rotated and moved by 180 degrees around the central axis.

  An annular groove 811 surrounding the protrusion 810 is formed around the protrusion 810. Further, a rib 821 for preventing the drop-out is provided on the inner surface of the insertion hole 820 into which the protruding portion 810 of another annular spacer 800 arranged adjacent to the insertion hole 820 is inserted.

  Moreover, although Embodiment 1-3 demonstrated the example in case the thin part by an annular groove was provided around a protrusion part, this invention is not limited to this. For example, if the thickness around the protruding portion is a thickness that can be broken by the pressing force at the time of fastening, the thickness around the protruding portion is larger than between the surface on the first object to be fastened side of the annular spacer and the bottom surface of the buried hole. What does not have the thin part which made thickness thin is also included in this invention.

  Moreover, although Embodiment 1-3 demonstrated the example in the case of providing the rib which latches a protrusion part in the inner surface of an insertion hole, this invention is not limited to this. For example, the structure which provides a rib on the surrounding surface of a protrusion part may be sufficient in order to prevent a protrusion part falling out from an insertion hole.

  In the first to third embodiments, an example in which the same number of protrusions and insertion holes are provided has been described, but the present invention is not limited to this, and there may be dummy insertion holes.

  Moreover, although Embodiment 1-3 demonstrated the example when the circumference | surroundings of a protrusion part fracture | rupture by the pressing force at the time of fastening, and the said protrusion part is accommodated in a burial hole, this invention is limited to this. It is not a thing. For example, the present invention includes a case in which the protrusion is accommodated in the buried hole when the periphery of the protrusion is deformed.

  In Embodiments 1 to 3, the example in which the protruding portion and the insertion hole of the annular spacer have a circular shape has been described, but the present invention is not limited to this, and the fitting between the protruding portion and the insertion hole Any shape can be used as long as it can be combined. For example, the shape may be an ellipse, a polygon, a star, or the like.

It is the perspective view which showed an example of schematic structure of the fastening component by Embodiment 1 of this invention, and the mode before fastening of the fastening component 1 is shown. It is the top view which showed the structural example of the bush 100 in the fastening component 1 of FIG. It is sectional drawing which showed the structural example of the bush 100 in the fastening component 1 of FIG. 1, and the cut surface by the AA line of FIG. 2 is shown. It is the top view which showed the structural example of the annular spacer 200 in the fastening component 1 of FIG. It is sectional drawing which showed the structural example of the annular spacer 200 in the fastening component 1 of FIG. 1, and the cut surface by the BB line of FIG. 4 is shown. It is sectional drawing which expanded and showed the principal part of the cyclic | annular spacer 200 of FIG. 5, and the mode of the protrusion part 210 periphery is shown. It is sectional drawing which showed the mode at the time of overlapping the annular spacer 200 of FIG. FIG. 2 is a cross-sectional view illustrating an example of a fastening structure including the fastening part 1 of FIG. 1, and shows a fastening structure in which the objects to be fastened 2 and 3 are fastened by a screw 4 penetrating the collar portion 110. It is the figure which expanded and showed the principal part of the fastening structure of FIG. 8, and the mode of the protrusion part 210 periphery of the annular spacer 200 arrange | positioned adjacent to the 1st to-be-fastened thing 2 is shown. It is sectional drawing which showed one structural example of the fastening component by Embodiment 2 of this invention, and the cyclic | annular spacer 400 with which the annular groove 411 was provided in the bottom face 441 of the burying hole is shown. It is the top view which showed one structural example of the fastening component by Embodiment 3 of this invention, and the cyclic | annular spacer 500 in which the through-hole 512 was provided along the cyclic | annular groove 511 is shown. It is the top view which showed the structural example of the fastening component by other embodiment of this invention, and the cyclic | annular spacers 600-800 are shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fastening component 2 1st to-be-fastened object 3 2nd to-be-fastened object 4 Screw 100 Bush 110 Collar part 120 Base part 130 Head accommodation hole 200 Annular spacer 210 Protruding part 211 Annular groove 220 Insertion hole 221 Rib 230 Inner peripheral surface 231 Rib 240 Buried holes 400 to 800 Annular spacers 410 to 810 Projecting parts 411 to 811 Annular grooves 620 to 820 Insertion holes

Claims (8)

When fastening the first fastened object and the second fastened object, two or more annular spacers arranged in a state of being overlapped between the fastened objects, and the annular spacer penetrating the first fastened object It consists of a bush with a collar part to be inserted,
In the fastening component in which the first fastened object and the second fastened object are fastened by screws that penetrate the collar portion and the two or more annular spacers,
The annular spacer is a protrusion provided on one surface;
An insertion hole for inserting the protruding portion of the annular spacer disposed adjacent to the other surface side;
A fastening component comprising: an embedment hole provided on the other surface side and burying the protruding portion by a pressing force at the time of fastening.   The fastening part according to claim 1, wherein a thickness around the protrusion is a thickness that can be broken by the pressing force.   The fastening part according to claim 1, wherein the annular spacer includes a thin portion having a thickness thinner than that between the one surface and the bottom surface of the buried hole around the protruding portion.   The fastening part according to claim 3, wherein an annular groove surrounding the projecting part is formed.   The fastening part according to claim 1, wherein a thickness of the protruding portion is thinner than a depth of the buried hole. Each of the annular spacers is disposed such that the insertion hole is a through-hole, and the insertion hole of the annular spacer disposed adjacent to the other surface is opposed to the buried hole,
The fastening component according to claim 1, wherein a rib for locking the protrusion is provided on an inner surface of the insertion hole.   The fastening component according to claim 6, wherein the rib is formed in a central axis direction of the annular spacer. In an annular spacer used in a state where two or more are overlapped,
A protrusion provided on one side;
An insertion hole for inserting the protruding portion of the annular spacer disposed adjacent to the other surface side;
An annular spacer provided on the other surface side and provided with an burying hole for burying the protruding portion by a pressing force at the time of fastening.

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