JP4315837B2 - Fastening parts and fastening method - Google Patents

Description

  The present invention relates to a resin fastening part that fastens a portion where relative displacement occurs due to a difference in linear expansion with a fastened member, and a fastening method thereof.

  If the material is different between the member to be fastened and the resin fastening part and the linear expansion coefficients of the two are different, a difference occurs in the amount of change in the length of both when expanded or contracted due to a temperature change. When such parts are fastened to each other with a fastener, the relative displacement between the two is suppressed by the fastener, so that the member to be fastened or the fastening part bends, and a gap is created between the two. It gets worse or cracks.

Therefore, conventionally, for example, a boss part (collar member) having a fastener insertion hole and a resin console box body (fastening part) extending in the vehicle front-rear direction are connected to the console box body and the vehicle floor (fastened member). And a flexible rib that flexibly absorbs and absorbs expansion and contraction due to a temperature change in the longitudinal direction, and a boss portion is fastened to the floor by a fastener inserted through the insertion hole (for example, a patent) Reference 1).
JP 2002-104075 A

  However, in the conventional fastening component, since the flexible rib remains without being broken, in order to enhance the effect of absorbing the expansion / contraction difference, the flexible rib must be easily bent. If it does so, fixation with a fastening component and a to-be-fastened member will become inadequate.

  In addition, when viewed from the side, the collar member and the long hole wrap, so when molding a fastening part, one mold must be extended to the periphery of the other mold. The mold has a complicated shape, the manufacturing cost is high, the mold strength is weakened at that portion, and the mold life is shortened.

  The present invention has been made in view of the above points, and the object of the present invention is to provide a relative displacement due to a difference in linear expansion with a fastened member by devising a configuration around the collar member. Is to absorb.

  In order to achieve the above object, according to the present invention, the collar member is integrally formed with the peripheral wall so as to be breakable so as to protrude from the peripheral wall forming the long hole when viewed from the side.

  Specifically, the invention of claim 1 is directed to a fastening part fastening method in which a portion where relative displacement occurs due to a difference in linear expansion between a fastened member and a resin fastening part is fastened by a fastener. And

  And when it sees from the side while it has a collar member which controls movement of the fastening direction of the above-mentioned fastener, and a long hole which accommodates this collar member in the direction which absorbs the above-mentioned relative displacement A fastening part integrally formed with the peripheral wall so that the collar member protrudes from the peripheral wall forming the elongated hole is prepared, and the peripheral wall and the collar are pressed by a pressing force when the fastener is fastened to the member to be fastened. The connection with the member is broken, and the fastening component is fastened to the fastened member in a state where the collar member is accommodated in the long hole.

  In invention of Claim 2, it makes object the resin fastening parts fastened to a to-be-fastened member with a fastener.

  Then, the collar member that restricts the movement of the fastener in the fastening direction and the collar member are movably accommodated in a direction that absorbs the relative displacement caused by the difference in linear expansion between the member to be fastened. The collar member is integrally formed with the peripheral wall so as to be ruptured so as to protrude from the peripheral wall forming the long hole when viewed from the side, and the fastener is attached to the member to be fastened. The connection between the peripheral wall and the collar member is broken by the pressing force when fastened to, and the collar member is fastened to the fastened portion in a state of being accommodated in the long hole.

  According to the invention of the fastening part fastening method of the first aspect and the invention of the fastening part of the second aspect, the peripheral wall and the peripheral wall are integrally breakable so as to protrude from the peripheral wall forming the long hole when viewed from the side. The molded collar member is broken from the peripheral wall of the long hole by using a pressing force when the fastener is fastened to the member to be fastened. For this reason, it is not necessary to prepare and set a color member separately, the work man-hour can be reduced, and the number of parts can be reduced. In addition, when the fastening part is viewed from the side, the wrap between the collar member and the long hole is made small, so in the molding die for molding the fastening part, one molding die is around the color member of the other molding die. There is no need to extend the mold, and the mold becomes a simple shape, sufficient mold strength is obtained, and the manufacturing cost is low. Furthermore, after the fastening part is fastened, the collar member is completely detached from the long hole peripheral wall, so that the relative displacement due to the difference in linear expansion between the fastened member and the fastening part is smoothed in the long hole. Can be absorbed into.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a substantially rectangular plate-like floor lid 1 to which a fastening part 11 according to an embodiment of the present invention is attached and which is placed on a floor (not shown) of a trunk room of an automobile so as to be opened and closed. As shown also in FIG. 2, this floor lid 1 is obtained by blow-molding a lid body 3 composed of a resin base material 3a and a nonwoven fabric 3b covering the surface thereof. In order to ensure this, two square pipe-shaped iron cores 5 extending in the vehicle width direction are mounted on the rear side and the front side of the lid body 3. In order to pass the core material 5, a core material insertion hole 9 (shown in FIG. 4 and the like) is provided on the side wall of the lid body 3 so as to penetrate in the vehicle width direction.

  A cap 7 is provided on the side wall of the lid body 3 in order to hide the core material insertion hole 9 on the rear side of the vehicle body. On the other hand, fastening parts 11 are provided at both left and right ends of the front core 5. That is, as shown in FIGS. 3 and 4, the fastening part 11 has a shape that covers the back surfaces of the left and right corners on the front side of the vehicle body of the lid body 3 (only the right corner is shown in the figure). The bottom wall 11a is provided with a long hole 15 for inserting a tapping screw 13 as a fastener into a lower hole 5a (shown in FIG. 7) provided in the core material 5. A screw insertion hole 21 for inserting a tapping screw 13 into a through hole 17 (shown in FIG. 2) provided on the back surface of the lid main body 3 and fastening them together is provided on the rear side of the vehicle body from the long hole 15. . A half-engagement claw 23 projects from the upper side of the screw insertion hole 21.

  Further, between the screw insertion hole 21 and the long hole 15 of the fastening part 11, a shaft pin 25 for supporting the floor lid 1 so as to be openable and closable protrudes from the side wall 11 b on the outer side in the vehicle width direction of the fastening part 11. It is provided to do. The shaft pins 25 of the left and right fastening parts 11 have a substantially conical tip and are concentrically provided. On the other hand, on the floor of the trunk room, two support portions 27 (indicated by a two-dot chain line in FIG. 1) having a concave portion 27a recessed in a quadrispherical shape are provided at spaced positions at opposite positions in the vehicle width direction. . The tips of the left and right shaft pins 25 are placed in the recesses 27a of the respective support portions 27, and the floor lid 1 can be opened and closed in the trunk room by rotating around the shaft pins 25 around the vehicle body. It has become. In addition, by providing some play in the vehicle width direction in the recess 27a, the displacement in the vehicle width direction due to the linear expansion of the lid body 3 is absorbed.

  As a feature of the present invention, as shown in FIG. 5, the elongated hole 15 is formed in the direction in which relative displacement occurs due to the difference in linear expansion between the lid body 3 and the core material 5, that is, in the vehicle width direction. The collar member 19 is integrally formed with the peripheral wall 15a forming the long hole 15 so as to be breakable at the center portion of the long hole 15 so as to be long. The collar member 19 has a through-hole 19a through which the tapping screw 13 is inserted, and is a cylindrical member that restricts the movement of the tapping screw 13 in the tightening direction. It protrudes and is connected to the peripheral wall 15 a by a thin connection portion 29 on the short side of the long hole 15. For example, the connecting portion 29 has a width of 1.5 mm and a thickness of about 1.0 mm when viewed from below, and can be easily broken by a pressing force when the tapping screw 13 is fastened to the core material 5. It is configured to be.

-Fastening method for fastening parts-
Next, the fastening method of the fastening component concerning embodiment of this invention is demonstrated.

  As shown in FIG. 6, a blow molded lid body 3 is prepared, and the core material 5 is inserted from the core material insertion hole 9 toward the inside.

  And the core material 5 is installed in the predetermined position shown in FIG. 7, for example, the center part of the vehicle width direction of the core material 5 is fixed to the lid main body 3 with a volt | bolt (not shown).

  Next, after inserting the half-engagement claw 23 of the fastening part 11 into the through hole 17 on the back surface of the lid body 3 (see FIG. 2), the tapping screw 13 is inserted into the screw insertion hole 21 of the fastening part 11 from below. The fastening claw 23 is fastened while being spread, and the fastening part 11 is attached to the corner of the lid main body 3.

  Next, as shown in FIG. 8, the tapping screw 13 is inserted into the through hole 19 a of the collar member 19 of the fastening part 11 and the lower hole 5 a of the core material 5 from the lower side and fastened to each other.

  At this time, while pressing the tapping screw 13 against the core material 5, the lower hole 5 a is expanded and fastened, and the connecting portion that connects the peripheral wall 15 a of the long hole 15 of the fastening part 11 and the collar member 19 with the pressing force at this time. 29 is broken.

  As shown in FIG. 4, the lid body 3 and the core material 5 to which the fastening component 11 is fixed are obtained by tightening the tapping screw 13 to the lid body 3 in a state where movement in the tightening direction is restricted by the collar member 19. And are fixed.

-Effect of the embodiment-
Therefore, according to the fastening component 11 and the fastening method of the present embodiment, the collar member 19 integrally formed in a breakable manner with the peripheral wall 15a so as to protrude from the peripheral wall 15a forming the long hole 15 when viewed from the side, The tapping screw 13 is broken from the peripheral wall 15a of the elongated hole 15 by using a pressing force when fastening the tapping screw 13 to the core material 5. For this reason, it is not necessary to prepare and set the collar member 19 separately, the work man-hour can be reduced, and the number of parts can be reduced.

  Further, since the wrap between the collar member 19 and the long hole 15 is reduced when the fastening component 11 is viewed from the side, in the molding die for molding the fastening component 11, one molding die is replaced with the other molding die. It is not necessary to extend to the periphery of the collar member 19, the mold becomes a simple shape, sufficient mold strength is obtained, and the manufacturing cost is low.

  Further, after the fastening part 11 is fastened, the collar member 19 is completely detached from the peripheral wall 15a of the elongated hole 15, so that the relative displacement due to the difference in linear expansion between the core material 5 and the fastening part 11 is reduced. It can be absorbed smoothly in the long hole 15.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment. That is, as shown in FIG. 9, the fastening component 11 and the core material 5 may be fastened by the blind rivet 113 instead of the tapping screw 13. In this case, the lower hole 5 a of the core material 5 may be larger than that of the tapping screw 13.

  Moreover, in the said embodiment, the vehicle width direction center part of the core material 5 is fixed to the lid main body 3, the fastening component 11 is provided in the front left-right corner of the lid main body 3, and the center part of the core material 5 is fastened and fixed to the lid main body 3. However, for example, the center part in the vehicle width direction of the core material 5 is not fixed to the lid body 3, and the two screw insertion holes 21 are not provided in the fastening part 11 on the left side of the vehicle body without providing the long hole 15 and the collar member 19. The core material 5 and the fastening part 11 are completely fixed, only the right fastening part 11 has the same configuration as the fastening part 11 according to the above-described embodiment, and the lid body 3 is composed of only the right fastening part 11. The relative displacement due to the difference in linear expansion between the core material 5 and the core material 5 may be absorbed.

  Furthermore, in the said embodiment, although the lid main body 3 is blow-molded, you may carry out injection molding.

  Moreover, although the fastening component 11 used for the floor lid 1 was demonstrated in the said embodiment, the site | part which produces the relative displacement by the difference of linear expansion between a to-be-fastened member and a fastening component is fastened mutually with a fastener. In this case, the present invention can be applied.

  As described above, the present invention is useful for a resin fastening part that fastens a portion where relative displacement occurs due to a difference in linear expansion with a fastened member and a fastening method thereof.

It is a perspective view which shows the floor lid with which the fastening component concerning embodiment of this invention was mounted | worn. It is the II-II sectional view taken on the line of FIG. It is the perspective view which looked at fastening parts from the lower part. It is the IV-IV sectional view taken on the line of FIG. The long hole of a fastening component is shown, (a) is a top view, (b) is the Vb-Vb sectional view taken on the line. FIG. 5 is a view corresponding to FIG. 4 illustrating a process of inserting the core material into the lid body. FIG. 5 is a view corresponding to FIG. 4 illustrating a process of placing the core material on the lid body. FIG. 5 is a view corresponding to FIG. 4 illustrating a process of fastening the tapping screw to the core material. It is the FIG. 2 equivalent view which shows the fastening component concerning other embodiment.

Explanation of symbols

5 Core material (member to be fastened)
11 Fastening parts 13 Tapping screws (fasteners)
15 long hole 15a peripheral wall 19 collar member

Claims (2)

A fastening method of a fastening part for fastening a part where relative displacement due to a difference in linear expansion occurs between a member to be fastened and a resin fastening part by a fastener,
A collar member that restricts movement of the fastener in the tightening direction and a long hole that movably accommodates the collar member in a direction that absorbs the relative displacement, and the collar when viewed from the side. Prepare a fastening part integrally formed with the peripheral wall so that the member protrudes from the peripheral wall forming a long hole so that it can be broken;
Breaking the connection between the peripheral wall and the collar member with a pressing force when fastening the fastener to the member to be fastened,
A fastening method for a fastening part, wherein the fastening part is fastened to the fastened member in a state where the collar member is accommodated in the elongated hole. It is a resin fastening part fastened to a member to be fastened by a fastener,
A collar member for restricting movement of the fastener in the tightening direction;
An elongated hole that movably accommodates the collar member in a direction that absorbs relative displacement due to a difference in linear expansion generated between the collar member and the fastened member;
The collar member is integrally formed so as to be breakable with the peripheral wall so as to protrude from the peripheral wall forming the elongated hole when viewed from the side,
The connection between the peripheral wall and the collar member is broken by a pressing force when the fastener is fastened to the fastened member, and the collar member is fastened to the fastened portion in a state of being accommodated in the long hole. Fastening parts.

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