JP2000168469A - Structure for fastening grounding terminals together - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the positioning and the rotation prevention of a grounding terminal at the time of fastening the grounding terminal to a molding to be fitted to a car body panel. SOLUTION: A grounding terminal T is formed with a rotation preventive part Tc formed out of a recessed part and a projecting part in a circumference around a bolt insertion hole Ta. On the other hand, a bracket part 12 of a molding 11 is provided with a positioning projections 12b for positioning the grounding terminal T so that a bolt hole 12a of the bracket part 12 and the bolt insertion hole Ta of the grounding terminal T coincide with each other while abutting on the rotation preventive part Tc and the outer periphery of the grounding terminal T and for regulating the grounding terminal T in the rotation preventive condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a ground terminal, and more particularly, to one-touch positioning and positioning of a ground terminal when mounting a molded article for an automobile to a vehicle body panel and simultaneously fixing the ground terminal. It is intended to improve the workability of the mounting work by making it possible to prevent the rotation.

[0002]

2. Description of the Related Art Generally, a vehicle body panel of a vehicle incorporates a resin protector for fixing a wire harness along a predetermined path, a branch connection of a large number of electric wires, and electric components such as a relay and a fuse. A molded product such as an electric connection box is attached by bolts. In some cases, the ground terminal protruding from a molded product or an end of an electric wire extended from another wire harness is jointly fastened to a vehicle body panel by a bolt for fixing the molded product. As described above, a harness protector described in Japanese Utility Model Laid-Open No. 62-95414 is known as one in which the ground terminal is fastened together when the molded product is fixed.

In the harness protector, as shown in FIG. 5, a bracket 1a is integrally protruded from a side wall of the protector 1, and an earth terminal 2 is overlapped on the bracket 1a so that a bolt hole 2a is aligned. Thereafter, the bolt B is fastened to the vehicle body panel P together. The set position of the ground terminal 2 can be determined by a pair of claw pieces 1b projecting from the bracket portion 1a.

[0004]

However, since the head of the ground terminal 2 is generally disk-shaped, the ground terminal 2 is rotated in the tightening direction by tightening the bolt B in the above-mentioned co-tightening structure. There was a thing. As a result, the direction of taking out the electric wire connected to the ground terminal 2 is
There is a problem in that it interferes with other components and electric wires arranged around the protector 1, which may be shifted from a predetermined direction.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem. When the ground terminals are jointly fastened with bolts, only the ground terminals are placed on the bracket portion, and the rotation stops during the tightening work simultaneously with the positioning. The task is to be able to do so.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, an earth terminal is matched with a bracket portion of a molded product, and the ground terminal is jointed to a vehicle body panel together with the molded product by bolts. The earth terminal has a detent portion formed of a concave portion or a convex portion around the bolt insertion hole, while the bracket portion has the detent portion and the ground. A grounding terminal which comes into contact with the outer periphery of the terminal, and which is positioned so that the bolt hole of the bracket portion and the bolt insertion hole of the grounding terminal are aligned with each other and, at the same time, a positioning projection is provided to restrict the rotation of the grounding terminal. The joint tightening structure is provided.

According to the above construction, when the ground terminal is mounted on the bracket portion, only the detent is engaged with the positioning projection, and the bolt insertion hole of the ground terminal is inserted into the bolt hole of the bracket portion. At the same time, the ground terminal can be restricted to a non-rotating state.

[0008] The detent portion is formed of a hook piece protruding forward from the tip of the ground terminal and bent downward, and the hook piece is formed on the side wall of the molded product forming the base of the bracket portion. It is desirable to form a locking hole into which the is inserted and locked (claim 2). In this way, when aligning the grounding terminal with the bracket, the hooking piece can be inserted into the locking hole on the side wall to position and prevent rotation of the grounding terminal, and at the same time, the bent portion at the tip of the hooking piece can be bent. Since the ground terminal is locked in the locking hole, the ground terminal is prevented from moving in the pull-out direction, and the positioning state of the ground terminal can be stabilized.

[0009] The tip of the hook piece inserted from the locking hole abuts inside the molded product, and the ground terminal is located at a position where the bolt hole of the bracket portion and the bolt insertion hole of the ground terminal match. It is desirable that a stopper wall that protrudes a stopper besides positioning the ground terminal and restricting the ground terminal from rotating. As a result, the leading end surface of the hooking piece and the stopper come into contact with each other in a surface-contact manner, and the rotation of the ground terminal can be prevented between them. As a result, in the initial stage of the tightening with the bolt, the rotation stop by the stopper wall functions sufficiently, so that the positioning protrusion, which is the original anti-rotation part, is at the stage where the rotational friction force of the bolt at the final stage of the bolt tightening acts more strongly. It only needs to function. Therefore, since the height of the positioning projection can be set low, interference with the tool can be prevented, and the workability of tightening the bolt can be improved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of a structure in which a ground terminal T is jointly fastened when a wire harness protector is attached to a vehicle body panel P as a resin molded article 11 for a vehicle. At the longitudinal end of the molded product 1, a bracket portion 12 made of a flat plate-like small piece for attachment to the vehicle body panel P is integrally and horizontally protruded from the side wall portion 11a. B
Is inserted through a bolt hole 12a for inserting a through hole. In the present embodiment, the ground terminal T matches one of the brackets 12 (the lower one in FIG. 1), and is fixed together to the vehicle body panel P with the bolt B.

As shown in FIG. 2A, the ground terminal T is formed in a disk shape having a bolt insertion hole Ta formed at the center thereof, and has a crimp portion Tb for connecting an electric wire W at one end.
Further, as a rotation stopping portion Tc of the ground terminal T, a crimping portion T
A hook piece Te having a claw piece Td bent downward and projecting forward from a tip end opposite to b is integrally provided.

On the side wall 11a of the molded product 11 forming the base of the bracket 12, a hook piece Te of the ground terminal T is provided.
Is formed into a locking hole 11b into which the hole is inserted. Lock hole 11
b, the hook terminal Te is inserted into the ground terminal T.
Is pulled in the pulling-out direction, the bent claw Td is engaged with the base end surface of the bracket portion 12. Further, on the bracket part 12, the bolt insertion hole Ta of the ground terminal T is arranged so as to abut on both side end surfaces of the hook piece Te of the ground terminal T at a position corresponding to the bolt hole 12a. A pair of positioning projections 12b are provided so as to protrude from the rotation preventing state. A guide surface 12c that expands toward the bolt hole 12a is formed at the end of the facing surface of the positioning protrusion 12b, and the guide surface 12c allows the hook piece Te to be easily inserted into the locking hole 11b. At the same time, the ground terminal T is positioned at the above position by contacting the outer peripheral surface of the ground terminal T. The height of the positioning projection 12b is desirably set to be substantially equal to the thickness of the ground terminal T in order to avoid interference with the bolt B tightening tool.

In the inside of the molded article 11, a tip end surface of a hook piece Te of the ground terminal T inserted from the locking hole 11b at a position where the bolt insertion hole Ta of the ground terminal T matches the bolt hole 12a. A stopper wall 11c is integrally protruded from the side wall 11a at a position where the claw pieces Td of the respective members come into surface contact with each other. The ground terminal T is positioned in the same manner as the operation of the positioning projection 12b by the surface of the claw piece Td at the above-mentioned position abutting against the stopper wall 11c at the same time, and at the same time is regulated to a detent state. .

According to the above configuration, the ground terminal T is formed into a molded product 1.
2 together with the vehicle body panel P, first, a wire harness (not shown) in the molded product 11 in a state where the bracket portion 12 matches the mounting position of the vehicle body panel P as shown in FIG. ), The ground terminal T connected to the wire W branched out is pulled out to the position of the bracket portion 12 to be fastened together. Next, as shown in FIG. 2 (B), the bolt insertion hole T of the ground terminal T is inserted into the bolt hole 12a of the bracket 12.
The ground terminal T is positioned and arranged so that a is matched. The details of this positioning process are shown in the cross-sectional views of FIGS. 3A to 3C as described below.

As shown in FIG. 3A, in the process of inserting the ground terminal T into the locking hole 11b in the direction of arrow X,
The tip of the hook piece Te is the guide surface 12 of the positioning protrusion 12b.
Since it is guided along c, it is easily inserted into the locking hole 11b. Further, when the ground terminal T is pushed in, FIG.
As shown in (B), the claw piece Td at the tip of the hook piece Te abuts against the stopper wall 11c inside the molded product 11 in a face-to-face manner, and further pushing is restricted. Due to this regulation, the ground terminal T is connected to the bolt hole 12 of the bracket 12.
At the same time as the bolt insertion hole Ta matches a, the rotation preventing state is set. Further, both sides of the base of the hook piece Te are sandwiched between the pair of positioning protrusions 12b, and the guide surface 12c is in a state of contacting the outer peripheral surface of the ground terminal T. Therefore, the grounding terminal T is also positioned by the positioning protrusions 12b, and is restricted to a detent state.

After the ground terminal T has been positioned and restricted from rotating as described above, as shown in FIG. 3C, the bolt B is inserted through the bolt insertion hole Ta and the bolt hole 12a into the mounting hole of the vehicle body panel P. The ground terminal T is inserted into the molded product 11 by tightening the nut Pb with a tool.
At the same time, it is fastened to the vehicle body panel P together. Accordingly, the ground terminal T does not rotate during the tightening, the wire W connected to the ground terminal T can be taken out in a predetermined direction, and interference with other members can be avoided.

In this embodiment, even when the ground terminal T is lifted from the bracket portion 12 at the initial stage of tightening with the bolt B, the claw piece Td at the tip of the ground terminal T and the stopper wall 11c are provided. Therefore, there is no problem even if the hook piece Te is disengaged from the positioning projection 12b. On the other hand, at the stage where the rotational frictional force of the bolt B at the final stage of the tightening of the bolt B acts more strongly, the detent function by the positioning projection 12b works effectively. Thereby, for example, even in a use state in which the bolt B is tightened from below, contrary to the above example, the function of preventing the rotation of the ground terminal T can be reliably exhibited.

Further, in the present invention, the locking hole 11b and the stopper wall 11c provided in the side wall 11a may not be provided. For example, as shown in a modified example of FIGS. 4A and 4B, the detent portions T1c and T2 of the ground terminals T1 and T2.
As c, a convex portion T1d or a concave portion T2d is formed on the circumference around the bolt insertion holes T1a and T2a. on the other hand,
The bracket portions 22 and 32 have the detent T1.
c, T2c and the outer periphery of the ground terminals T1, T2, and the bolt holes 22a, 32a and the bolt insertion holes T1a, T1
Positioning projections 22b and 32b are provided so as to be positioned so that 2a is coincident and to restrict the rotation to a detent state at the same time.

In the above embodiment, an example in which the molded product is applied to a protector for a wire harness is shown, but the invention can be similarly applied to an electric junction box and other molded products for automobiles.

[0020]

As is apparent from the above description, according to the joint structure of the earth terminal of the present invention, when the earth terminal is jointly fastened to the vehicle body panel together with the molded product, the earth terminal is inserted into the bolt hole of the bracket portion. At the same time that the bolt insertion holes are aligned, the ground terminal can be positioned with a single touch at a position where the ground terminal can be restricted to a detented state. Therefore, the rotation of the ground terminal following the tightening of the bolt can be prevented, and interference with other members can be prevented.
The workability of the joint fastening operation can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a co-tightening structure of a ground terminal according to the present invention is applied to a protector.

FIGS. 2A and 2B are perspective views of a main part.

FIGS. 3A to 3C are views showing a joint fastening step using bolts.

FIGS. 4A and 4B are perspective views showing a modification.

FIG. 5 is a diagram showing a conventional example.

[Explanation of symbols]

 P Body panel B Bolt T, T1, T2 Ground terminal Ta, T1a, T2a Bolt insertion hole Tc, T1c, T2c Non-rotating part Te Hook piece 11 Molded product 11a Side wall part 11b Lock hole 11c Stopper wall 12, 22, 32 Bracket portions 12a, 22a, 32a Bolt holes 12b, 22b, 32b Positioning protrusions

Claims (3)

[Claims] 1. A structure in which an earth terminal is matched with a bracket part of a molded product, and the ground terminal is fixedly fastened to a vehicle body panel together with the molded product by bolts. While a detent or a detent is formed on the circumference of the bracket, the bracket is in contact with the outer periphery of the detent and the ground terminal, and the ground terminal is connected to the bolt hole of the bracket and the ground terminal. A ground terminal co-tightening structure characterized by projecting positioning projections for positioning the bolt insertion holes so as to coincide with each other and for restricting the bolts from rotating at the same time. 2. The detent portion comprises a hook piece protruding forward from the tip of the ground terminal and bent downward and formed on a side wall portion of a molded product forming a base of the bracket portion. 2. The ground terminal joint fastening structure according to claim 1, wherein a locking hole into which the hook piece is inserted and locked is formed. 3. The inside of the molded product is brought into contact with a tip end surface of the hook piece inserted from the locking hole, so that the bolt hole of the bracket portion and the bolt insertion hole of the ground terminal match. 3. The ground terminal joint fastening structure according to claim 2, wherein a stopper wall for positioning the ground terminal and for restricting the ground terminal from rotating is projected.