JPH0741984U - Co-tightening structure of ground terminal and parts - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a joint tightening structure for terminals, which allows the lock claws to automatically bend outward when tightening bolts. [Structure] Bolt insertion hole 7 of bracket 7 of mounted member
The upper part of the lock claw 7b provided around a is formed on the sloped surface 7c, and when the bolt 9 is tightened, the outer end of the tightening surface of the bolt is brought into contact with the sloped surface 7c to automatically lock the lock claw 7b. Bend to the outside. The slope 7c of the lock claw 7b is formed such that the front side 7g in the bolt tightening direction is outward and the rear side 7h is inward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure in which a ground terminal and a component are fastened together with a member to be mounted, and for example, an electric connection box is fastened together with a ground terminal together with a bolt in a vehicle body.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 5, when a bracket 2 of an electrical connection box such as a relay block is fastened together with a ground terminal 3 to a body 1 of an automobile with a bolt 4, the earth terminal 3 is inserted through a bolt of the bracket 2. To facilitate the insertion and tightening of the bolt 4 by positioning it in the hole 2a, a lock claw 2b that locks the outer periphery of the earth terminal 3 is integrally provided around the bolt insertion hole 2a of the bracket 2. There is.

[0003]

[Problems to be solved by the device]

 However, when tightening the bolt 4, the tightening surface of the bolt 4 (when the spring washer 4a and the counter washer 4b are inserted in the bolt 4, the tightening surface of the counter washer 4b) is the outer shape of the ground terminal 3. If it is substantially the same as or larger than, the bolt tightening surface abuts on the upper part of the lock claw 2b that is locked to the peripheral edge of the ground terminal 3, and the lock claw 2b is sandwiched between the ground terminal 3 and the bolt 4. It will be. Since the ground terminal 3 is grounded by contacting the tightening surface of the bolt 4, it is necessary to contact the ground terminal 3 and the bolt tightening surface without interposing the lock claw 2b. Therefore, it is necessary to tighten the bolts 4 while contacting the ground terminal 3 while bending the lock claws 2b outward with a jig, and the tightening work is troublesome. Could not be provided.

The present invention has been made to solve the above-mentioned problem. When the bolt is tightened, the lock claw is automatically bent outward so that the tightening surface of the bolt and the ground terminal are brought into contact with each other. The purpose is to enable fastening of parts and bolts.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, according to claim 1 of the present invention, in a structure in which a component is fastened together with a ground terminal to a mounted member with a bolt, the outer periphery of the ground terminal is provided around a bolt insertion hole of the component. When the outer end of the tightening surface of the bolt comes into contact with the upper part of the lock claw, bend the lock claw outward to bend the bolt tightening surface and the ground terminal. The invention provides a joint tightening structure for a component and a grounding terminal, which is characterized in that a sloped surface is formed so as not to interpose a lock claw.

According to a second aspect of the present invention, there is provided a co-fastening structure characterized in that a plurality of the lock claws are provided around the electric contact portion of the ground terminal with a required gap. .

Further, in claim 3, the slope of the lock claw is inclined in the vertical direction from the outside to the inside, and in the circumferential direction, the front side in the rotational direction of the bolt is outward and the rear side is inward. The present invention provides a co-tightening structure characterized by being formed on the.

[0008]

[Action]

 According to the structure of claim 1, since the upper part of the lock claw provided around the bolt insertion hole of the mounted member is formed as a slope, the outer end of the tightening surface of the bolt is tightened when tightening the bolt. The part comes into contact with the slope to automatically bend the lock claw outward. As a result, it is not necessary to bend the lock claws outward with the jig, so that the tightening work can be performed easily. Further, since it is not necessary to use a jig, it is possible to position the terminal by providing the lock claw even in a place where the jig cannot be used.

According to the second aspect of the present invention, the entire outer periphery of the electrical contact portion of the ground terminal can be securely positioned and held on the component, and the positions of the bolt insertion holes of the ground terminal and the component can be reliably secured. Can be matched.

Further, according to the structure of claim 3, when the bolt tightening surface comes into contact with the upper and lower slopes of the lock claw, the lock claw can be gradually bent outward in accordance with the tightening of the bolt. Do not cause the locking claw to fall abruptly outward and cause damage. In addition, the slope of the lock pawl is circumferentially formed so that the front side in the tightening direction (rotational direction) of the bolt is outward and the rear side is inward. The lock claw will not be twisted, the lock claw will be easier to bend, and tightening will be smooth.

[0011]

【Example】

 Hereinafter, the present invention will be described in detail with reference to illustrated embodiments. As shown in FIGS. 1 and 2, a bracket 7 of an electric connection box such as a relay block fixed to a body 6 of an automobile is resin-molded, and a bolt insertion hole 7a is formed in the bracket 7. A bolt insertion hole 8a is also formed in the disk-shaped electric contact portion 8b of the ground terminal 8 to be tightened together.

Around the bolt insertion hole 7a of the bracket 7, the ground terminal 8 is provided at three positions, which are outside the outer circumference of the electrical contact portion 8b of the ground terminal 8 and are divided into four equal parts on the circumference. , 7b for locking and positioning the outer periphery of the electric contact portion 8b are integrally provided.

A spring washer 9a and a disc washer 9b are inserted into a bolt 9 for fastening the bracket 7 together with the ground terminal 8 to the body 6, and the lower surface of the disc washer 9b serves as a bolt fastening surface 9c.

Each of the lock claws 7b has a substantially L-shaped cross section in which a claw part 7e is provided at the tip of a shaft part 7d protruding from the bracket 7, and the claw part 7e is located on the outer peripheral surface of the electrical contact part 8b of the ground terminal 8. The ground terminal 8 is positioned and held by being locked to. As shown in FIGS. 3 and 4, the upper surface of the claw portion 8e of the lock claw 8b contacts the lock claw 7b when the outer end of the bolt tightening surface 9c of the bolt 9 comes into contact (see the contact point a). A slanted surface 7c that is inclined in the up-down direction is formed so as to automatically bend the shaft outward from the shaft portion 7d.

Further, as shown in detail in FIGS. 4 (A) and 4 (B), the lock claw 7 b has an inclined surface 7 c on the upper surface of the claw portion 7 e in the circumferential direction in the tightening direction of the bolt 9 (right-hand screw). The taper is taken along the clockwise direction), and the front side 7g in the tightening direction (bolt rotation direction) is outward, and the rear side 7h is an inward sloped slope. There is.

Because of the above-described configuration, as shown in FIG. 3, the bolt insertion hole 7a of the bracket 7 of the electric junction box is aligned with the bolt insertion hole 7a of the body 6 of the automobile, and the bolt insertion hole 7a of the bracket 7 is aligned. When the bolt insertion hole 8a of the ground terminal 8 is aligned with the ground terminal 8, the outer periphery of the ground terminal 8 is locked by the lock claw 7b and positioned and held. At that time, when the electric contact portion 8b of the ground terminal 8 is pushed in from above the lock pawl 7b, the sloped surface 7c is opened outward so that the electric contact portion 8b can be easily inserted, and when the electric contact portion 8b is inserted, the lock pawl is inserted. 7b returns to the original state and the claw portion 7e is locked to the peripheral edge of the electric contact portion 8b.

Next, the bolt 9 is inserted into the bolt insertion holes 8 a and 7 a of the ground terminal 8 and the bracket 7 and tightened in the bolt hole 6 a of the body 6. At that time, the outer end of the tightening surface 9c of the bolt 9 comes into contact with the sloped surface 7c of the lock claw 7b (state of FIG. 3), and when the bolt 9 is further tightened, the lock claw 7b automatically bends outward. (State of FIG. 2).

As a result, the lock claw 7b can be electrically connected to the bolt tightening surface 7c and the ground terminal 9 in accordance with the tightening of the bolt 9 without bending the lock claw 7b outward with a jig as in the conventional case. 8B, the bolt 9 can fix the earth terminal 8 and the bracket 7 of the electric junction box with the common body 6 in a state where the bolt tightening surface 7c is in contact with the electric contact portion 8b.

As described above, since it is not necessary to use a jig, the bolt 9 can be easily tightened, and since the jig is not used, the lock claw 7b can be used even in a crowded place where the jig cannot be used. Can be provided to position the ground terminal 8.

Further, the slope 7c of the lock claw 7b is formed with the front side 7d and the rear side 7e in the rotation direction of the bolt 9 as the slopes inclined in the circumferential direction as described above. Since the lock claw 7b is free to escape in the tightening direction, the outer end of the tightening surface 9c of the bolt 9 does not twist the lock claw 7b, and the lock claw 7b becomes flexible and tightens smoothly. It can be carried out.

[0021]

[Effect of device]

 As is clear from the above description, in the co-tightening structure according to claim 1 of the present invention, the terminal positioning lock claw provided around the bolt insertion hole of the mounted member is used for tightening the bolt when tightening the bolt. Since the tightening surface automatically bends outward, there is no need to bend the lock claws outward with a jig, and bolt tightening work can be performed easily. Also, since it is not necessary to use a jig, it is possible to position the terminal by providing the lock claw even in a place where the jig cannot be used.

Further, when a plurality of lock claws having the structure of claim 2 are provided in the circumferential direction, the electrical contact portion of the ground terminal is securely positioned and held by the component to be tightened together, and the bolt is inserted through the ground terminal and the component. The holes can be surely aligned and the bolt tightening work becomes easy.

Further, according to the third aspect of the present invention, since the inclined surface of the lock claw is formed to be inclined in the vertical direction and is also formed to be inclined along the rotational direction of the bolt in the circumferential direction, it is possible to tighten the bolt. Accordingly, the tightening surface of the bolt does not twist the lock claw, and the lock claw is gradually flexed outward so that tightening can be performed smoothly.

[Brief description of drawings]

FIG. 1 is a plan view of a joint fastening structure for terminals according to the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a sectional view of FIG. 1 before tightening the bolt.

FIG. 4A is a side view of the lock claw, and FIG.
FIG.

FIG. 5 is a cross-sectional view of a conventional co-fastening structure for terminals.

[Explanation of symbols]

 6 Body 7 Bracket 7a Bolt Insertion Hole 7b Lock Claw 7c Slope 7d Shaft 7e Claw 7g Front 7h Rear 8 Ground Terminal 8a Bolt Insertion Hole 8b Electric Contact 9 Bolt 9c Bolt Tightening Surface

Claims (3)

[Scope of utility model registration request] 1. A structure in which a component is fastened together with a ground terminal to a member to be mounted with a bolt, and a lock claw for locking the outer periphery of the ground terminal is provided around a bolt insertion hole of the component, When the outer end of the tightening surface of the bolt comes into contact with the upper part of the lock claw, the lock claw is bent outward so that the lock claw does not intervene between the bolt tightening surface and the ground terminal. A joint structure with a ground terminal and parts, which is characterized by the formation of a slope. 2. The co-fastening structure according to claim 1, wherein a plurality of the lock claws are provided around the electric contact portion of the ground terminal with a required space. 3. The slope of the lock claw is inclined vertically from the outer side to the inner side, and in the circumferential direction,
The co-fastening structure according to claim 1, wherein a front side of the bolt in a rotation direction is formed on an outer side and a rear side is formed on an inner side.