JP2006292118A - Anchor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an anchor in a locked state from rotating in relation to a mounting hole without increasing insertion load of the anchor to a mounting hole. <P>SOLUTION: In an anchor, a pair of locking pieces 18 are arranged on both sides of a column 12, respectively. Locking claws 20 are provided to outside surfaces near tips 18b of both locking pieces. By inserting the column 12 and both locking pieces 18 into a mounting hole 32 of a plate member 30, the locking claws 20 of both locking pieces are engaged with the edge of the mounting hole 32 so as to be brought in a locked state. The column 12 is provided with blocks 14 projecting toward the tips 18b of both locking pieces 18 from both sides thereof. Both blocks 14 are opposed to each other to cause an interference with the tip of at least one of locking pieces when a torque around an axis of the column is applied to the column 12 in a locked state to produce a relatively twisting force between the column 12 and both locking pieces 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an anchor that is integrally or integrally assembled with a clamp for a wire harness, for example, and is attached to a plate member such as a vehicle body.

The basic structure of this type of anchor includes a single column and a pair of locking pieces, and both the locking pieces are coupled to the column so as to be able to bend by elasticity. By inserting this anchor into a mounting hole formed through a plate member such as a vehicle body, both locking pieces pass through the mounting hole while being bent inward, and are formed on both locking pieces, respectively. A stepped locking pawl is engaged with the edge of the mounting hole. As a result, the anchor is locked with respect to the plate member. In addition, the basic structure of the anchor in the wire harness clamp is disclosed in Patent Document 1, for example.
JP 2001-95132 A

  In the locked state of the anchor, when a rotational force around the axis is applied to the column, a relative torsional force is generated between the column and the two locking pieces, and the locking pieces move inward accordingly. It will bend. As a result, the anchor rotates with respect to the mounting hole, and the locked state cannot be maintained. As a countermeasure, it is conceivable to increase the coupling rigidity of both locking pieces with respect to the column to make it difficult to bend. However, if this is done, the insertion load of the anchor into the mounting hole increases, which is not preferable.

  The present invention is intended to solve such problems, and an object thereof is to prevent the anchor in the locked state from rotating with respect to the mounting hole without increasing the insertion load of the anchor into the mounting hole. That is.

The present invention is for achieving the above object, and is configured as follows.
According to the first aspect of the present invention, a pair of locking pieces are positioned on both sides of the support column, and the base ends of both locking pieces are coupled to the support column so as to be able to bend by elasticity. Locking claws are respectively provided on the outer surfaces near the tip of the stopper pieces, and both the stopper pieces are inserted into the mounting holes formed through the predetermined plate members. It is an anchor that is locked by passing through the mounting hole while bending inward with respect to the column and the locking claws of both locking pieces engage with the edge of the mounting hole. Blocks projecting toward the front ends of both locking pieces are provided, and these blocks are provided with a rotational force around the axis of the supporting column in the locked state. At least one of the locking pieces when a relatively twisting force is generated therebetween It is set to be the tip portion and the interference can be opposed position.

  According to this configuration, when the anchor is inserted into the mounting hole of the plate member, the anchor strut and the both locking pieces are locked in the locked state even though both the locking pieces can be made to bend normally. When a relatively twisting force is generated between the first and second locking pieces, at least one of the locking pieces interferes with the block on the support column side, and inward bending is restricted. Accordingly, the anchor in the locked state is prevented from rotating with respect to the mounting hole without increasing the insertion load of the anchor with respect to the mounting hole, and the holding force of the locked state by the anchor can be increased.

The invention according to claim 2 is the anchor according to claim 1, wherein both of the blocks on the support column side are separated from each other with a straight line passing through the shaft center and both locking pieces as a boundary. Each is arranged on one side.
As a result, even if a rotational force that generates a torsional force is applied to the anchor in the locked state between the support column and both locking pieces in either direction, the tip of one locking piece must be Interference with the block restricts inward bending of the locking piece. Therefore, rotation of the anchor relative to the mounting hole can be prevented with respect to rotational force in either the left or right direction without increasing the number of blocks as a pair.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing a partially broken clamp anchor. FIG. 2 is a right side view of FIG. FIG. 3 is a plan view of the anchor. As shown in these drawings, the anchor 10 is integrally coupled to the base portion 27 of the clamp body 26. The outer portion of the base portion 27 is a dish-shaped stabilizer 24. That is, the stabilizer 24 is located at the boundary portion between the anchor 10 and the clamp body 26. The clamp body 26 is configured to hold, for example, a wire harness (not shown).

  The structure of the anchor 10 is roughly divided into one support column 12 and a pair of locking pieces 18 located on both sides of the support column 12. As for the support | pillar 12 of the anchor 10, the base 12a is integrated with the base part 27 in the center part of the stabilizer 24. FIG. Further, the tip portion 12b of the support column 12 has a tapered inclined surface 12c whose thickness (FIG. 2) when the support column 12 is viewed from the side surface gradually increases toward the base portion 12a. And the base end part 18a of both the locking pieces 18 is each couple | bonded with the both sides of this front part 12b. The distal end portions 18b of the locking pieces 18 extend toward the base portion 27, and the distal end portions 18b project outward from the base end portion 18a.

  The base end portions 18a of the both locking pieces 18 are coupled to each other so as to be able to bend inward and outward by individual coupling portions 18c having a predetermined elasticity with respect to the side surface of the tip portion 12b of the support column 12. In both locking pieces 18, a substantially middle portion between the base end portion 18 a and the coupling portion 18 c is a shoulder portion 18 d that protrudes outward most. A plurality of steps (three steps) of locking claws 20 are formed on the outer surface between the shoulder portion 18d and the tip portion 18b of both locking pieces 18. At the tip end portions 18b of the both locking pieces 18, there are respectively provided restricting claws 22 extending from there to the base portion 27 side. These restricting claws 22 are set to a width that is about half the width of each locking piece 18 (FIGS. 2 and 3). Further, the two restricting claws 22 are respectively arranged on one region side of both regions divided by the straight line A (FIG. 3) passing through the axis of the support column 12 and both locking pieces 18.

  On the base portion 27 side, the blocks 14 projecting from the base portion 12a of the support column 12 of the anchor 10 toward the distal end portions 18b of the locking pieces 18 are provided. These both blocks 14 are each arrange | positioned in the area | region on the opposite side to the side by which both the control claws 22 are arrange | positioned among the both areas divided by the straight line A shown in FIG. The end surfaces 14a facing the individual restricting claws 22 in the both blocks 14 and the restricting claws 22 are arranged so as to be shifted from each other by a predetermined distance S with respect to the rotational direction around the axis of the support column 12 (FIG. 2). ). In addition, the side part of the support | pillar 12 and both the blocks 14 are couple | bonded by the coupling wall 16 for reinforcement.

  As shown by phantom lines in FIGS. 1 to 3, a plate member 30 such as a vehicle body is formed with attachment holes 32 through which the anchor 10 is inserted and locked through the front and back. This attachment hole 32 is a long hole as apparent in FIG. 3, and the (short side × long side) of the attachment hole 32 in the present embodiment is, for example, (7 mm × 12 mm). When the anchor 10 is inserted into the mounting hole 32, both the locking pieces 18 are bent inward by the elasticity of the respective coupling portions 18c, so that the individual shoulder portions 18d pass through the mounting hole 32. As a result, one of the locking claws 20 in both locking pieces 18 selected according to the plate thickness of the plate member 30 engages with the edge of the mounting hole 32. As a result, the anchor 10 is locked with respect to the plate member 30.

  As already described, since the restricting claws 22 and both blocks 14 of the both locking pieces 18 are displaced from each other by a distance S shown in FIGS. 2 and 3, the anchor 10 is inserted into the mounting hole 32. The restricting claw 22 and the block 14 do not interfere with each other. Therefore, both the locking pieces 18 when passing through the attachment hole 32 can be bent as normal, and the insertion load of the anchor 10 with respect to the attachment hole 32 is kept within the set value range.

  Now, when the anchor 10 is in a locked state, a rotational force around its axis may be applied to the column 12 by some external force acting on the clamp body 26. Accordingly, a relatively twisting force is generated between the support column 12 and the locking pieces 18 engaged with the edge of the mounting hole 32. The state is shown in FIGS.

  FIG. 4 is a side view showing the anchor 10 in which the twist has occurred. FIG. 5 is a plan view showing the anchor 10 in which the twist has occurred. As shown in these drawings, when a rotational force in the direction of arrow B is applied to the support column 12 of the anchor 10, a relative shift in the rotation direction occurs between the support column 12 and both locking pieces 18. Thereby, the distance S between the restricting claw 22A in one locking piece 18A and the one block 14A corresponding to the locking piece 18A is reduced. In other words, even if one of the locking pieces 18A is bent inward based on the torsional force generated between the locking pieces 18A, the restricting claw 22A and the block 14A interfere with each other and the bending is restricted. Therefore, the anchor 10 in the locked state is prevented from rotating with respect to the attachment hole 32, and the holding force in the locked state is maintained.

  4 and 5, when the rotational force in the direction opposite to the arrow B in FIGS. 4 and 5 is applied, even if the locking piece 18 on the opposite side of the locking piece 18A tries to bend inwardly, its restricting claw 22 and block Deflection is regulated by interference with 14. As described above, if the bending of either one of the locking pieces 18 is restricted, the anchor 10 is prevented from rotating with respect to the mounting hole 32 even if the other is bent inward. However, by arranging the blocks 14 on both sides of the support column 12 and at a total of four locations in both areas separated by the straight line A shown in FIGS. However, it is also possible to always restrict the inward bending of both locking pieces 18.

Front view of the clamp anchor partially broken Right side view of FIG. Top view of anchor Side view of twisted anchor Plan view showing twisted anchor

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Anchor 12 Support | pillar 14 Block 18 Locking piece 18a Base end part 18b Tip part 20 Locking claw 30 Plate member 32 Mounting hole

Claims (2)

A pair of locking pieces are located on both sides of the support column, and the base ends of both locking pieces are coupled to the support column so that they can bend flexibly. Each of the locking pieces is provided with a locking claw, and the supporting column and both locking pieces are inserted into a mounting hole formed through a predetermined plate member, so that both locking pieces are bent inward with respect to the supporting column. An anchor that passes through the mounting hole and is locked by engaging the locking claws of both locking pieces with the edge of the mounting hole,
Each of the columns is provided with a block that projects from both sides toward the tip of both locking pieces, and these blocks are connected to the column in the locked state by applying a rotational force around its axis. An anchor that is set so as to be positioned so as to be capable of interfering with the tip of at least one of the locking pieces when a relatively twisting force is generated between the both locking pieces. An anchor according to claim 1, wherein
Anchors in which both blocks on the column side are respectively arranged in one of regions separated by a straight line passing through the axis of the column and both locking pieces.

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