JP2012241760A - Vehicle body component fastening structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work efficiency when removing a fastener, which is screwed to a caulking nut caulked by a resin member, from the caulking nut.SOLUTION: This vehicle body component fastening structure 10 includes: a fastening seat part 14 formed to project from a resin member 12 provided in a vehicle body; a caulking nut 20 caulked by the fastening seat part 14 and including a flange part 22 projecting outside from the fastening seat part 14; and a fastener 30 which fastens the resin member 12 and a fastened member 26 to each other by being screwed to the caulking nut 20.

Description

  The present invention relates to a fastening structure for body parts.

  2. Description of the Related Art Conventionally, a fastening structure for a vehicle body part including a caulking nut and a bolt for fastening one member formed of a different metal and the other member is known (see, for example, Patent Document 1). The caulking nut is attached to one of the members by clamping the periphery of the through hole between the caulking portion and the flange portion that are caulked around the through hole of the one member.

JP 2010-112425 A

  However, if one of the members is made of resin, the area around the through hole creeps over time, and the clamping pressure of the caulking nut may be reduced. When the clamping pressure of the caulking nut is reduced, when the bolt is removed from the caulking nut, the caulking nut rotates together with the bolt, and there is a problem that the bolt cannot be removed from the caulking nut.

  Therefore, in this case, it is necessary to hold the caulking nut with a fixing jig (tool such as pliers) so that it does not rotate. However, when the distance between one member and the other member is narrow, the flange portion of the caulking nut Is difficult to hold with a fixture. Moreover, when the one member side to which the caulking nut is attached has a closed cross-sectional structure, it is not possible to press the portion other than the flange portion of the caulking nut with a fixing jig.

  Accordingly, in view of the above circumstances, the present invention has an object to obtain a fastening structure for a vehicle body part that can improve workability when a fastener that is screwed into a caulking nut that is caulked to a resin member is removed from the caulking nut. And

  In order to achieve the above object, a vehicle body component fastening structure according to claim 1 of the present invention includes a fastening seat portion formed in a convex shape on a resin member provided on the vehicle body, and the fastening seat portion. A caulking nut having a flange portion that is caulked and projecting outward from the fastening seat portion; and a fastener that fastens the member to be fastened to the resin member by being screwed into the caulking nut. It is characterized by that.

  According to the first aspect of the present invention, the fastening seat portion of the resin member to which the caulking nut is caulked is formed in a convex shape. The caulking nut is provided with a flange portion that protrudes outward from the fastening seat portion. Therefore, a wide space for inserting the fixing jig can be secured between the resin member and the member to be fastened, and the flange portion of the caulking nut can be fixed by the fixing jig. Therefore, the workability | operativity at the time of removing the fastener fastened by the crimping nut crimped to the resin member from the crimping nut can be improved.

  According to a second aspect of the present invention, there is provided a fastening structure for a vehicle body part according to the first aspect, wherein the fastened member has a fastening seat portion formed in a concave shape. Yes.

  According to invention of Claim 2, the fastening seat part of the to-be-fastened member fastened by the resin member is formed in the concave shape. Therefore, a wider space for inserting the fixing jig can be secured between the resin member and the member to be fastened.

  A vehicle body part fastening structure according to claim 3 is the vehicle body part fastening structure according to claim 1 or 2, wherein the fastened member is a wiper bracket.

  According to the invention described in claim 3, it is particularly effective when the fastened member is a wiper bracket.

  As described above, according to the present invention, it is possible to provide a fastening structure for a vehicle body part that can improve workability when a fastener fastened to a caulking nut that is caulked to a resin member is removed from the caulking nut. it can.

It is sectional drawing which shows the fastening structure of the vehicle body component which concerns on 1st Embodiment. It is sectional drawing which shows the fastening structure of the vehicle body component which concerns on 2nd Embodiment. It is sectional drawing which shows the fastening structure of the vehicle body component which concerns on a comparative example.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. For convenience of explanation, in each figure, the arrow UP may be an upward direction, and there may be a case where “up” and “down” are added as a reference. The direction of each part is not limited. First, the fastening structure 10 according to the first embodiment will be described.

  As shown in FIG. 1, a fastening structure 10 used for fastening body parts includes a fastening seat portion 14 formed in a convex shape on a resin panel (back door inner panel) 12 as a resin member provided on the vehicle body, A caulking nut 20 having a flange portion 22 that is caulked to the fastening seat portion 14 and protrudes outward from the fastening seat portion 14 is screwed to the caulking nut 20, whereby the resin panel 12 serves as a fastening member. And a bolt 30 as a fastener for fastening the wiper bracket 26.

  The fastening seat portion (first fastening seat portion) 14 in the resin panel 12 protrudes upward at a predetermined height (at least enough to insert a fixing jig (not shown) described later) in a cross-sectional view of FIG. For example, it is formed in a circular shape (that is, a substantially cylindrical shape) when viewed from above. A through hole 14 </ b> C for caulking and attaching the caulking nut 20 is formed at the center of the fastening seat portion 14.

  The caulking nut 20 is below the flange portion 22 by a flange portion 22 having a circular shape in plan view supported by the inner peripheral edge portion 14B around the through hole 14C of the fastening seat portion 14 and a caulking jig (not shown). And the crimping part 24 which clamps the inner peripheral edge part 14B of the fastening seat part 14 with the flange part 22 by compressing and crushing (caulking) the site | part above the internal thread part 25 is provided. That is, the caulking nut 20 is attached and fixed to the fastening seat portion 14 (inner peripheral edge portion 14B) by sandwiching the inner peripheral edge portion 14B of the fastening seat portion 14 between the flange portion 22 and the caulking portion 24. It has become.

  And the outer diameter of the flange part 22 is made larger than the outer diameter of the fastening seat part 14, and the peripheral part 22A of the flange part 22 is more radial than the outer peripheral surface 14A of the fastening seat part 14 as mentioned above. It projects to the outside. The caulking portion 24 has an outer diameter smaller than the outer diameter of the flange portion 22, and the illustrated one is formed to be the same as or slightly smaller than the inner diameter of the fastening seat portion 14. .

  The bolt 30 is inserted from above the wiper bracket 26 into a bolt insertion hole 26 </ b> A formed in the wiper bracket 26 in order to fix the metal wiper bracket 26 to the upper surface of the flange portion 22 of the caulking nut 20. The caulking nut 20 is screwed. That is, the wiper bracket 26 is sandwiched and fixed by the head portion 32 of the bolt 30 and the flange portion 22.

  As shown in FIG. 1, the outer peripheral edge portion 12 </ b> A of the resin panel 12 is bonded to another resin panel 16 with an adhesive 18 to form a closed cross-sectional structure. Therefore, a fixing jig (not shown) is inaccessible below the flange portion 22 of the caulking nut 20. In other words, in the caulking nut 20, only the flange portion 22 is pressed by a fixing jig (not shown).

  Next, the operation of the vehicle body component fastening structure 10 having the above configuration will be described. As described above, the caulking nut 20 includes the caulking portion 24 in which the inner peripheral edge portion 14B around the through hole 14C in the fastening seat portion 14 formed in a convex shape on the resin panel 12 is caulked by a caulking jig (not shown). By being sandwiched by the flange portion 22, it is fixedly attached to the inner peripheral edge portion 14B.

  Therefore, when creep with time does not occur in the inner peripheral edge portion 14B, when the bolt 30 is screwed into the caulking nut 20 or when the bolt 30 is removed from the caulking nut 20, the caulking nut 20 The bolt 30 is screwed into the caulking nut 20 or removed from the caulking nut 20.

  However, when the inner peripheral edge portion 14B creeps over time, the clamping pressure on the inner peripheral edge portion 14B by the flange portion 22 and the caulking portion 24 is reduced (insufficient), and the caulking when the bolt 30 is removed from the caulking nut 20 The nut 20 rotates with the bolt 30, so that the bolt 30 cannot be removed from the caulking nut 20.

  In this case, the outer peripheral edge portion 12A of the resin panel 12 is joined to the resin panel 16 to form a closed cross-sectional structure. Is not accessible. Therefore, only the flange portion 22 of the caulking nut 20 is pressed by the fixing jig so that the caulking nut 20 does not rotate.

  However, like the fastening structure 11 according to the comparative example shown in FIG. 3, when the fastening seat portion 15 has a shape that does not protrude upwardly, it is illustrated between the resin panel 12 and the wiper bracket 26. A space for inserting a fixing jig that cannot be secured cannot be secured, and the flange portion 23 of the caulking nut 21 cannot be pressed by the fixing jig.

  On the other hand, in the fastening structure 10 according to the present embodiment shown in FIG. 1, the fastening seat portion 14 protrudes upward in a convex shape (substantially cylindrical shape) upward, and the flange portion 22 of the caulking nut 20 The outer diameter is made larger than the outer diameter of the fastening seat portion 14, and the peripheral edge portion 22 </ b> A protrudes radially outward from the outer peripheral surface 14 </ b> A of the fastening seat portion 14.

  Accordingly, a vertical space S1 for inserting a fixing jig (not shown) can be secured between the resin panel 12 and the wiper bracket 26, and the flange portion 22 of the caulking nut 20 can be secured with the fixing jig. It can be held so as not to rotate.

  Therefore, the inner peripheral edge portion 14B of the fastening seat 14 sandwiched between the flange portion 22 and the caulking portion 24 of the caulking nut 20 creeps over time, and the clamping pressure on the inner peripheral edge portion 14B by the flange portion 22 and the caulking portion 24 is increased. Even if it reduces, the bolt 30 can be removed from the caulking nut 20.

  That is, this makes it possible to improve workability when the bolt 30 screwed into the caulking nut 20 is removed from the caulking nut 20. In addition, after removing the bolt 30 from the caulking nut 20, it is desirable that the caulking portion 24 of the caulking nut 20 is caulked again with a caulking jig (not shown) to restore the clamping pressure.

  Next, the fastening structure 10 according to the second embodiment will be described. In addition, the same code | symbol is attached | subjected to the site | part equivalent to the said 1st Embodiment, and detailed description (a common effect | action is also included) is abbreviate | omitted. As shown in FIG. 2, in the fastening structure 10 according to the second embodiment, only a concave fastening seat portion (second fastening seat portion) 28 is formed on the wiper bracket 26 which is a fastened member. This is different from the first embodiment.

  That is, the wiper bracket 26 has a concave shape in a sectional view of FIG. 2 (a convex shape projecting downward by a predetermined height) and, for example, a circular shape (that is, a substantially cylindrical shape) when viewed from below. ) A fastening seat 28 is formed. The outer diameter of the fastening seat portion 28 is substantially the same as the outer diameter of the fastening seat portion 14 formed on the resin panel 12, and is smaller than the outer diameter of the flange portion 22 of the caulking nut 20.

  That is, the peripheral edge portion 22A of the flange portion 22 of the caulking nut 20 protrudes radially outward from the outer peripheral surface 14A of the fastening seat portion 14 and the outer peripheral surface 28A of the fastening seat portion 28. And the space S3 is formed in the up-down direction by the fastening seat part 28 made into the concave shape above 22 A of peripheral parts of the flange part 22. As shown in FIG.

  Accordingly, the vertical space S2 in the second embodiment is configured to be wider by the space S3 than the vertical space S1 in the first embodiment. That is, the fastening structure 10 according to the second embodiment is easier to insert a fixing jig (not shown) than the fastening structure 10 according to the first embodiment. 20 flange portions 22 are easily pressed.

  In the fastening structure 10 according to the second embodiment, since the fastening seat portion 28 is formed in a concave shape, the head portion 36 of the screw 34 as a fastener is the wiper bracket 26 excluding the fastening seat portion 28. It is possible not to protrude from the upper surface of the substrate. Thereby, the designability can also be improved.

  As mentioned above, although the fastening structure 10 of the vehicle body part which concerns on this embodiment was demonstrated based on drawing, the fastening structure 10 which concerns on this embodiment is not limited to the thing of illustration, and deviates from the summary of this invention. The design can be appropriately changed within the range not to be. For example, the shape of the fastening seats 14 and 28 is not limited to a circular shape in plan view, and may be a regular polygonal shape in plan view.

10 Fastening structure 12 Resin panel (resin member)
14 Fastening seat 20 Clamping nut 22 Flange 26 Wiper bracket (fastened member)
28 Fastening seat 30 Bolt (fastener)

Claims (3)

A fastening seat formed in a convex shape on a resin member provided on the vehicle body;
A caulking nut provided with a flange portion that is caulked to the fastening seat portion and projects outward from the fastening seat portion;
A fastener that fastens a member to be fastened to the resin member by being screwed to the caulking nut;
A vehicle body component fastening structure characterized by comprising:   The fastening structure for a vehicle body part according to claim 1, wherein the member to be fastened has a fastening seat portion formed in a concave shape.   The fastening structure for a vehicle body part according to claim 1 or 2, wherein the member to be fastened is a wiper bracket.

Images