JPH0660965U - Ground terminal - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the work of fixing the ground terminal to the body hole of the vehicle body using the bolt and nut. [Structure] In a grounding terminal (10) integrally formed with a grounding connection part (13) having a mounting hole (14) for penetrating a bolt and an electric wire connection part (12), a mounting hole for the grounding terminal (10)
A constriction part (17) is provided on the head side shaft part of a bolt (15) to be passed through (14), and the constriction part (17) of the bolt (15) is rotated into the mounting hole (14) of the ground terminal (10). Freely penetrate,
Shaft part (18) protruding from the constricted part (17) and bolt head
The outer peripheral portion of the mounting hole of the ground terminal (10) is sandwiched between (16), and the bolt (15) is pre-assembled integrally with the ground terminal (10) so as not to be detachable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ground terminal suitably used for a vehicle wire harness or the like, in which a ground terminal connected to an electric wire terminal is fixed to a vehicle body by using a bolt and a nut.

[0002]

[Prior art]

 Conventionally, as shown in FIGS. 11 (A) and 11 (B), the ground terminal 1 has a shape including an electric wire connecting portion 1a crimped to an electric wire and an earth connecting portion 1c having a mounting hole 1b at a central portion thereof. A bolt (not shown) that is fixed in advance to the vehicle body 2 on the back side of the body hole 2a by inserting the bolt 3 into the mounting hole 1b of the ground terminal 1 with respect to the body hole 2a previously drilled in 2. The bolt 3 is fastened and fixed to the.

To fix the ground terminal 1, first, as shown in (A), the bolt 3 is sucked and held by the air impact wrench 4 of the bolt tightening tool, and then, as shown in (B), Position and place the grounding terminal 1 by hand so that its mounting hole 1b is aligned with the body hole 2a of the vehicle body 2, and in this state, attach the bolt 3 held by the air impact wrench 4 to the mounting hole 1b of the grounding terminal 1 and the body. Bolts on the back side of the vehicle body 2 are passed through the holes 2a and tightened to nuts fixed to the periphery of the holes.

[0004]

[Problems to be solved by the device]

 In the work of fixing the ground terminal described above, first, the work of holding the bolt 3 on the air impact wrench 4, the work of positioning the ground terminal 1, and the work of tightening the bolt at the end are required. There is a drawback.

Further, at the time of the bolt tightening work, the worker holds the ground terminal 1 with one hand while positioning and holding the ground terminal 1, and the other hand holds the air impact wrench 4 to perform the bolt tightening work. Therefore, there is a disadvantage in that the ground terminal holding side of the one-handed holding becomes unstable and the mounting hole 1b and the body hole 2a often deviate from each other.

The present invention is intended to solve the above-mentioned drawbacks, and it is an object of the present invention to simplify the work of fixing the ground terminal and to prevent the mounting hole of the ground terminal from being displaced from the body hole. There is.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a grounding terminal integrally formed with a grounding connection part having a mounting hole for penetrating a bolt and an electric wire connecting part. A constricted portion is provided on the side shaft portion, the constricted portion of the bolt is passed through the mounting hole of the ground terminal, and the outer peripheral portion of the mounting hole of the ground terminal is clamped between the shaft portion protruding from the constricted portion and the bolt head. It is intended to provide a grounding terminal characterized in that a bolt cannot be detached from the grounding terminal and is preliminarily integrally assembled so as to be freely rotatable.

The bolt that rotatably penetrates through the mounting hole of the ground terminal includes the constricted portion annularly recessed on the outer peripheral surface of the shaft portion that is continuous with the head portion at the base end side, and the constricted portion from the constricted portion. A screw is engraved on the outer peripheral surface of the shaft that protrudes and extends to the tip.On the other hand, the mounting hole for the ground terminal has a diameter that allows the bolt shaft to pass through, and the bolt penetrates the mounting hole from the tip of the shaft. Then, the outer edge of the mounting hole of the ground terminal is compressed at the outer peripheral position of the constricted portion and locked to the constricted portion.

Alternatively, the bolt is divided into two parts, that is, a head side portion in which a constricted portion smaller than a mounting hole for the ground terminal is continuously provided and a shaft portion larger than the mounting hole for the ground terminal. After the constricted part is pierced through the mounting hole of the ground terminal, the constricted part protruding from the through hole and the shaft part are connected and fixed to each other with a screw or a pin.

Alternatively, the constricted portion provided on the bolt is formed by cutting out opposite side portions of the shaft portion so as to have a rectangular cross section, while the diameter of the ground terminal mounting hole is set to be smaller than that of the bolt shaft portion. Form a notch that allows the above-mentioned constriction to pass through the mounting hole, pass the constriction of the bolt through the notch of the ground terminal, and then rotate the bolt to locate the mounting hole on the outer periphery of the constriction. Are locked.

Alternatively, the bolt is engraved with a groove extending axially from the tip of the shaft to the head side, and engraved with an annular groove continuous with the head end of the groove. The ring-shaped groove serves as a constriction, while the grounding terminal mounting hole has a larger diameter than the bolt shaft and a protrusion protruding from the inner peripheral surface of the mounting hole. When it is inserted further and reaches the neck of the head, the earth terminal or bolt is rotated to lock the protrusion of the earth terminal to the neck of the bolt.

Alternatively, the diameter of the shaft portion of the bolt is reduced from the head side to the tip side, and a cut is made from the tip side to the head side, and the bolt shaft portion is attached to the mounting hole of the ground terminal from the tip side. After inserting, the diameter of the bolt shank tip side is expanded from the above-mentioned notch so that the portion engaged with the mounting hole of the ground terminal becomes a constricted part having a smaller diameter than the shank tip side.

Alternatively, the ground terminal is composed of a pair of terminals (so-called inbeta terminals) each having an electric wire connecting portion and a semi-circular earth connecting portion, and the semi-circular earth connecting portion is provided on the bolt shaft portion. After mounting, the tips are connected to each other and the ring-shaped ground connection part is locked to the constricted part of the bolt.

[0014]

[Action]

 In the case of the earth terminal with the above-mentioned bolts already assembled together, when fixing the earth terminal to the vehicle body, first insert the tip of the bolt into the body hole of the vehicle body, and in that state, tighten the tool with the bolt head. It can be attached and bolted.

Therefore, the work of attaching the bolt to the tool by holding the front can be omitted. Also, since the ground terminal can be held with the tip of the bolt inserted in the body hole, there is no misalignment between the mounting hole of the ground terminal and the body hole, which has occurred in the past. It can be done efficiently.

[0016]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. 1 and 2 show a first embodiment of the present invention. The ground terminal 10 has the same shape as the conventional one, is formed of a metal plate, and is provided with a pair of barrel portions forming the wire connection portion 12 by bending at one end of the board 11. The wire W is caulked and crimped to the connection. The board 11 is provided with an earth-shaped connecting portion 13 which is continuous with the wire connecting portion 12 and has an annular shape, and a mounting hole 14 for penetrating a bolt is provided at the center of the earth connecting portion 13.

The bolt 15 integrally includes a hexagonal head portion 16, a constricted portion 17 continuous with the head portion 16, and a shaft portion 18 continuous with the constricted portion 17. The constricted portion 17 is composed of an annular small-diameter portion that is recessed in the outer peripheral surface of the shaft portion 18 that is continuous with the head portion. Further, a reduced diameter portion 19 is provided at the tip of the shaft portion 18 in order to facilitate insertion into the body hole.

When the outer diameter of the constricted portion 17 of the bolt 15 is A, the outer diameter of the shaft portion 18 is B, and the inner diameter of the mounting hole 14 of the ground terminal 10 is C, A <B <C is set.

Bolts 15 are assembled in advance to the ground terminal 10 in the order shown in FIGS. 2 (A) to 2 (D). That is, as shown in (A), the bolt 15 is inserted into the mounting hole 14 of the ground terminal 10 from the tip side of the shaft portion 18. At that time, since the inner diameter C of the mounting hole 14 is set to be slightly larger than the outer diameter B of the shaft portion 18, it can be easily inserted. As shown in (B), there is a gap between the constricted portion 17 and the mounting hole 14 when the mounting hole 14 is located in the constricted portion 17. Then, the ground terminal 10 and the bolt 15 are positioned in the mold 20 shown in (C), and the outer peripheral end of the ground connecting portion 13 of the ground terminal 10 is compressed by the mold 20 from four directions as shown by arrows. In this operation, the inner diameter of the mounting hole 14 is reduced, and the outer peripheral edge of the mounting hole 14 is inserted into the constricted portion 17. By the above work, the peripheral edge of the mounting hole 14 can be rotatably clamped between the bolt head 16 and the shaft portion 18 projecting from the constricted portion 17, and the bolt 15 as shown in FIG. The ground terminal 10 is completed.

The earth terminal 10 integrated with the bolt 15 is fixed to the body hole 22 formed in the vehicle body 21 by the work shown in FIGS. 3 and 4. As shown in FIG. 3 (A), a nut 23 is previously welded and fixed to the back surface of the body hole 22 of the vehicle body 21. When fixing the ground terminal 10 to the body hole 22, the reduced diameter portion 19 at the tip of the shaft portion of the bolt 15 integrally assembled as shown in FIG. 3B is fitted onto the body hole 22 and the nut 23. In this state, as shown in FIG. 4, the head 4a of the air impact wrench 4 is attached to the head 16 of the bolt 15 and the head 4a is rotated. The bolt 15 is rotated by the rotation of the head 4a, the male screw provided on the outer peripheral surface of the shaft portion 18 is screwed into the female screw of the nut 23, and the earth terminal 10 is connected to the vehicle body 21 as shown in FIG. 3 (C). Fixed to.

FIG. 5 shows a second embodiment, in which the bolt 15 is divided into two parts, and the head side portion 15A in which a constricted portion 17 smaller than the mounting hole 14 of the ground terminal 10 is continuously provided and the mounting hole of the ground terminal. It is divided into a shaft portion side portion 15B provided with a shaft portion 18 larger than 14. The outer diameter A of the constricted portion 17 is set to be much smaller than the diameter B of the shaft portion 18, and a male screw 17a is formed on the outer peripheral surface thereof. On the other hand, a female screw hole 18a recessed in the center is opened on the end face of the shaft portion 18 on the head connection side, and the constricted portion 17 is inserted into the female screw hole 18a while screwing the male screw 17a. I am trying to be connected.

The inner diameter C of the mounting hole 14 of the ground terminal 10 is set to be larger than the outer diameter A of the constricted portion 17 and smaller than the outer diameter B of the shaft portion 18. The earth terminal 10 is attached to the mounting hole 14 through the constricted portion 17 of the head side portion 15A of the bolt 15, and then the shaft portion 18 is screwed into the constricted portion 17 protruding from the mounting hole 14. In addition, the bolt 15 is integrally attached to the ground terminal 10 in a rotatable and non-separable state.

In the third embodiment shown in FIG. 6, in contrast to the second embodiment, two divided bolts are screwed together for connection, whereas the constricted portion 17 having a rectangular cross section has a pin hole 17b. On the other hand, a pair of holding piece portions 18b into which the constricted portions 17 are fitted are projected from the end surface of the shaft portion 18, and pin holes 18c are formed in these holding piece portions 18b. In the third embodiment, after the constricted portion 17 is penetrated through the mounting hole 14 of the ground terminal 10, the holding piece portion 18b of the shaft portion 18 is externally fitted to the constricted portion 17 and connected by the pin 25 to be assembled. . In this assembled state, the ground connection portion 13 of the ground terminal 10 is rotatably held between the upper end surface of the shaft portion 18 of the bolt 15 and the lower end surface of the bolt head 16.

FIG. 7 shows the fourth embodiment, and the constricted portion 17 provided on the bolt 15 is formed in a rectangular cross section by cutting out opposite side portions of the shaft portion 18. On the other hand, the inner diameter C of the mounting hole 14 of the ground terminal 10 is set to be smaller than the outer diameter B of the bolt shaft portion 18, and the notch 26 that opens to the outer end of the ground connecting portion 13 continuously with the tip side of the mounting hole 14 is formed. Is provided. The width D of the notch 26 is substantially the same as the length E on the short piece side of the constricted portion 17 so that the notch 26 can be passed through the constricted portion 17. Moreover, the length F on the long side of the constricted portion 17 is set to be slightly smaller than the inner diameter C of the mounting hole 14.

The bolt 15 is inserted into the mounting hole 14 by passing the constricted portion 17 through the notch 26 of the ground terminal 10 in the lateral direction, and then rotating the bolt 15 so that one long side of the constricted portion 17 is inserted. The constricted part 17 is locked so as not to come off from the notch 26 by facing the notch 26 side, and the peripheral part of the mounting hole of the earth terminal 10 is rotatably sandwiched between the bolt head 16 and the shaft part 18. Then, the bolt 15 is integrally assembled to the ground terminal 10.

FIG. 8 shows a fifth embodiment. The bolt 15 is provided with a pair of grooves 27 extending axially from the tip of the shaft portion 18 toward the head portion 16 on opposing outer peripheral surfaces. In addition, a groove formed in an annular shape is formed on the outer peripheral surface so as to be continuous with the head side tips of the pair of grooves 27, and the groove serves as the constricted portion 17. On the other hand, the inner diameter C of the mounting hole 14 of the ground terminal 10 is made larger than the outer diameter B of the bolt shaft portion 18, and a pair of protrusions 28 protruding opposite from the inner peripheral surface of the mounting hole 14 are provided. The protrusion 28 is sized to be inserted into the groove 27 of the bolt 15 and the constricted portion 17.

The bolt 15 is attached to the ground terminal 10 by inserting the groove 27 at the tip of the shaft into the protrusion 28 of the ground terminal 10, and when the constricted portion 17 continuous from the groove 27 is reached, the bolt 15 is rotated. Then, the protrusion 28 is locked to the constricted portion 17, and the bolt 15 is assembled to the ground terminal 10.

FIG. 9 shows a sixth embodiment, in which the diameter of the shaft portion 18 of the bolt 15 is reduced from the head portion 16 toward the tip, and the notch extending in the axial direction from the tip side to the head side. I have entered 29. On the other hand, the inner diameter C of the mounting hole 14 of the ground terminal 10 is set to be larger than the outer diameter B'of the shaft portion 18 on the tip side, and is set to be substantially the same as the diameter B "of the head side base portion.

The bolt 15 is inserted into the mounting hole 14 of the ground terminal 10 from the small diameter side of the shaft portion 18, and is locked to the head portion side having substantially the same diameter. In this state, the notch 29 is expanded from the tip end side of the shaft portion to expand its diameter so that the portion of the ground terminal 10 engaged with the mounting hole 14 becomes a constricted portion 17 having a smaller diameter than the tip end side of the shaft portion. The peripheral portion of the mounting hole of the ground terminal 10 is fixed to the portion 17 by pressure.

FIG. 10 shows a seventh embodiment, in which the bolt 15 is the same as in the first embodiment, and a constricted portion 17 is provided at the base of a shaft portion 18 which is continuous with the head portion 16. On the other hand, the ground terminal 10 is a so-called inbeta terminal, and is composed of a pair of terminals 10a and 10b each having an electric wire connecting portion 12 and a semi-circular earth connecting portion 13. Locking protrusions 30 and locking hole portions 31 are provided at the ends of the ground connecting portions 13, 13 of the pair of terminals 10a, 10b at positions facing each other during assembly. With the locking hole 31 being locked, the semi-annular earth connecting portion 13 is connected in an annular shape, and a circular mounting hole 14 is formed at the center.

With respect to the ground terminal 10, the bolt 15 inserts the shaft portion 18 between the semi-annular ground connection portions 13 before locking the pair of terminals 10a and 10b, and the constricted portion 17 is grounded. The bolts 15 are assembled to the ground terminal 10 by fitting the connection portions 13 from both sides and connecting the ground connection portions 13 to each other in this state.

The present invention is not limited to the above-described embodiment, but includes all configurations in which the bolt can be mounted in the mounting hole of the ground terminal in advance by rotation and in a non-separable manner.

[0033]

[Effect of device]

 As is clear from the above description, the earth terminal according to the present invention has the shaft portion of the bolt head side rotatably mounted in its mounting hole and pre-assembled integrally so that it cannot be removed. When fixing the terminals to the vehicle body using bolts and nuts, the work of attaching the bolts to a tool such as an air impact wrench can be omitted in advance. Further, when the ground terminal is positioned on the body of the mounted portion, the tip of the bolt shaft can be inserted into the body hole of the vehicle for positioning. Therefore, the mounting hole of the ground terminal is not displaced from the body hole, and the work of fixing the ground terminal can be performed efficiently.

[Brief description of drawings]

FIG. 1 is an exploded view of a ground terminal and a bolt according to a first embodiment of the present invention.

2 (A), (B), (C), and (D) are drawings showing a process of assembling the ground terminal and the bolt of the first embodiment.

3 (A), (B) and (C) are drawings showing a process of fixing the bolt integrated ground terminal of the first embodiment to a body hole of a vehicle body.

FIG. 4 is a perspective view of the step of FIG. 3 (B).

FIG. 5 is a perspective view of a second embodiment of the present invention.

FIG. 6 is a perspective view of a third embodiment of the present invention.

FIG. 7 is a perspective view of a fourth embodiment of the present invention.

FIG. 8 is a perspective view of a fifth embodiment of the present invention.

FIG. 9 is a schematic view of a sixth embodiment of the present invention.

FIG. 10 is a schematic view of a seventh embodiment of the present invention.

11A and 11B are drawings showing a conventional process for fixing a ground terminal to a vehicle body.

[Explanation of symbols]

 10 ground terminal 12 wire connection part 13 ground connection part 14 mounting hole 15 bolt 16 head 17 constriction part 18 shaft part

Claims (1)

[Scope of utility model registration request] 1. An earth terminal integrally formed with an electric wire connecting portion and an earth connecting portion having a mounting hole for bolt penetration, wherein a constricted portion is provided on a head side shaft portion of a bolt which is penetrated through the mounting hole of the earth terminal. Provided, the constricted part of the bolt is rotatably passed through the mounting hole of the ground terminal, and the outer peripheral part of the mounting hole of the ground terminal is sandwiched between the shaft part protruding from the constricted part and the bolt head, and the bolt is connected to the ground terminal. A ground terminal that is pre-assembled so that it cannot be removed.