JP2000048870A - Splice forming tool for wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily splice arbitrary wires out of wires for constituting a wire harness at the arbitrary position without largely fluctuating the total length of the wire. SOLUTION: Pressure plates 13, 14 of a conductive metallic material are respectively fixed to a base part 11A, having a band insertion hole 11a and a pressure plate mounting block 11V connected to a part of the base part 11A via a hinge, a plurality of pressure contact slots are provided on the pressure plates, and pressure contact blades are formed along the inner peripheral edges of the pressure contact slots. Wires are arranged between facing pressure contact slots of the pressure plates 13, 14, a band part 12A of a wire binding band 12 is inserted into the band insertion hole 11a, in a state where the pressure plate mounting block is locked on the base part, the residual wire is wound and fastened by the band part so as to be pinched between it and the pressure plate attaching block 11B, and therefore, the wires are spliced via the pressure plates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a splice forming device for forming an intermediate splice portion of a wire harness of an automobile, and more particularly, to a simple and reliable method for splicing between specific wires among wires used in a wire harness. The purpose of the present invention is to join the electric wires to form a branch circuit.

[0002]

2. Description of the Related Art Conventionally, when a specific circuit in a wire harness is connected to form a branch circuit, as shown in FIG. 8, the intermediate portions of the electric wires W1 and W2 to be connected are peeled off and core wires c1 and c2 are cut off. Are exposed, the core wires c1 and c2 are caulked and crimped by the intermediate joint terminal 1s, and the tape 2 is wound around the crimped portion to protect it.

[0003]

The above-mentioned conventional intermediate splicing method has a problem that the number of man-hours for stripping the electric wire, crimping the intermediate joint terminal, and winding the tape is large, which is troublesome.

[0004] When splicing between specific wires among wires constituting a wire harness, usually, at the stage of temporary binding, predetermined wires are crimped with an intermediate joint terminal and spliced. However, since the total length of the spliced wire fluctuates in the crimped state of the intermediate joint terminal,
It is difficult to adjust the dimensional relationship with other unspliced wires to a predetermined relationship. Therefore, the spliced wire may be pulled more than necessary at the time of the final bundling.
(A) The electric wires as shown in (A) and (B) may loosen (slack), and in the work of laying the wire harness W / H on the vehicle body, a worker's hand or tool may be caught on the wires and cause a disconnection. There was.

[0005] After the wiring, a band clamp to be attached to the vehicle body panel is wrapped around the wire harness at the stage of final binding. When the band clamp is wrapped around the intermediate splice, the intermediate splice is formed. The tensioned electric wire is further pulled by the winding of the band clamp to be disconnected, or the tool is caught by the slack of the electric wire caused by the formation of the intermediate splice during the work of locking the band clamp to the vehicle body. May be disconnected. Therefore, conventionally, the winding portion and the intermediate splice portion of the band clamp are provided at positions separated to some extent, which has been a cause of limiting the degree of freedom in designing the wire harness.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can splice any wire among wires constituting a wire harness easily at any position and without greatly changing the overall length of the wire. It is an object to provide a splice forming device for a wire harness.

Further, it is possible to arrange the splice position of the electric wire close to the attaching position of the band clamp for locking to the vehicle body, so that the degree of freedom in the design of the wire harness can be expanded more than before. That is the task.

[0008]

In order to solve the above problems, according to the present invention, a pressure contact block is protruded from a base having a band insertion hole via a hinge, and the hinge is bent. A press-contact plate made of a conductive metal material and having a press-contact slot formed with a press-contact blade having an inner peripheral edge at the tip is fixed to both the outer surface of the base and the one surface of the press-contact block which are opposed to each other when locked to the base. A pressure-bonding member that fixes the pressure-contact plate on one side and has a semicircular wire-receiving groove formed on the other side, and a wire-binding band formed with a band locking portion at one end of the band portion. From the group of wires, the wires to be spliced are spliced with the press-connecting plate through the press-contact block and the base of the press-contact member, while the other wires are arranged on the outer surface of the press-press block of the press-contact member. By winding a wire bundling band through a band insertion hole of the pressing member provides a structure as to have a wire harness splice form tool for fastening with the spliced wires.

In the above splice forming device, when arranging and temporarily binding the temporarily tied product, an arbitrary portion of the electric wire forming the branch circuit is sandwiched between the above-mentioned pressing members so that the pressing blade of the pressing plate comes into contact with the core wire. Then, the electric wire forming the branch circuit can be bound together with the remaining electric wires by a wire binding band passed through a band insertion hole at the base of the press-contact member. Therefore, an intermediate splice of an arbitrary electric wire forming a branch circuit of the electric wire group constituting the wire harness can be easily performed at the final bundling stage after the wiring, and the manufacturing efficiency of the wire harness can be greatly improved. . In addition, since splicing is performed by cutting the insulation coating and contacting the core wire with the press contact blade, the dimensional fluctuation of the electric wire is small, so that the electric wire forming the branch circuit causes slack (slack) and unnecessary tension. Can be prevented. Therefore, at the time of attaching the wire harness to the vehicle body or the like, it is possible to eliminate the danger that the tool or the like is hooked on the slack portion of the electric wire and the electric wire is broken.
Further, since unnecessary tension is not generated in the spliced electric wire, the band clamp can be wound near the intermediate splice portion, and the degree of freedom in designing the wire harness is increased.

According to a second aspect of the present invention, in the second aspect, a pressing block protrudes from a base having a band insertion hole via a hinge, and the base is opposed to an outer surface of the base facing when the hinge is bent and locked to the base. A pressure contact plate made of a conductive metal material on both surfaces of the pressure contact block and having a pressure contact slot formed at the tip with an inner peripheral edge serving as a pressure contact blade is fixed, or the pressure contact plate is fixed to either one and the other is fixed to the other. A press-contact member having a semicircular wire receiving groove formed thereon, and a clamp portion for locking to a vehicle body locking hole protruding from the base portion, and a wire binding band having a band locking portion formed at one end of the band portion. And, from among a number of bundled wires, a wire to be spliced is spliced and connected with the press-contact plate through the press-contact block and the base of the press-contact member, while other wires are connected to the press-contact member. Bushing for pressure welding And disposed on the outer surface of the click, providing structure and to have a wire harness splice form tool by winding wire tying band fastened together with the spliced wire passed through the band insertion hole of the pressing member.

In the splice forming device having the above-described structure, the clamp provided at the base of the press-contact member can be locked in the vehicle body locking hole, so that the vicinity of the splice forming portion of the wire harness can be attached to the band clamp and the wire harness when the portion is attached to the vehicle body. Can be omitted, and the product cost of the wire harness can be reduced.

[0012] In the splice forming tool according to the first or second aspect, it is preferable that two pressure contact plates attached to the base and / or the block for attaching the pressure contact plate are provided in the width direction (claim 3).

If two pressure contact plates are provided in the width direction as described above, splicing of the electric wire can be performed more reliably.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment. The splice forming device according to the present embodiment includes a pressing member 11
And a band 12 for binding electric wires.
The press-contact member 11 has a box-shaped base 11A having a locking clamp 20 on an upper surface and a band insertion hole 11a, and is connected to a lower end edge of one side of the base 11A via a hinge-shaped connecting portion 11C. And a pressing block 11B. The base 11A and the press-fitting block 1
1B is integrally molded with resin.

The pressure contact block 11B is connected to the hinge-like connecting portion 1.
1C, the frame 15 for defining a lock hole 15a protrudes from the tip thereof, and the lock hole 15 is formed by the press-fitting block 1 of the base 11A.
Lock claw 16 formed on the side opposite to the projecting side of 1B
It can be locked to.

A first pressure contact plate 13 made of a conductive metal material protrudes from the lower outer surface of the box-shaped base 11A. The lower end of the first pressure contact plate 13 is embedded and fixed by insert molding when the base 11A is formed.
A plurality of (two in the present embodiment) arc-shaped grooves 13a are formed in the protruding edge of the first press-contact plate 13, and the press-contact blades 13 extend along the arc-shaped inner peripheral edges of the slots 13a.
b is formed. In addition, the first pressing plate 13 is
Two are provided in parallel with the outer surface of A.

On the other hand, the base 11A of the pressing block 11B
A second surface made of a conductive metal material on the outer surface facing the lower outer surface
A pressure plate 14 is attached. The second pressing plate 14 has a lower end portion similar to the first pressing plate 13 at the lower end of the pressing block 1.
At the time of molding 1B, it is embedded by insert molding and fixed to the pressure contact block 11B. A slot 14a composed of a plurality of arc-shaped grooves is formed in the protruding edge of the second pressure plate 14 along the protruding edge, and a press-contact blade 14b is formed along the arc-shaped inner peripheral edge. Further, the two second press plates 14 are also provided in parallel in the width direction of the press block 11B, and the interval between the two second press plates 14 is the same as the interval between the two first press plates 13. And the slot pitch is also the first
It is the same as the pressing plate 13.

The wire binding band 12 is conventionally used for binding wires, and a band engaging piece (not shown) is provided at one end of the band portion 12A at the inner surface of the band insertion hole 12a.
Are formed to form a band locking portion 12B. The band portion 12A is formed to have a width and thickness that allow the band insertion hole 11a formed in the base portion 11A of the pressing member 11 to be inserted.

Next, a method for forming an intermediate splice portion between arbitrary wires of the wires constituting the wire harness using the splice forming tool will be described.

First, as shown in FIG. 3 (A), the wires W-1 and W-2 forming the branch circuit among the wired wires are connected to the first press-contact plate 13 on the lower outer surface of the base 11A or to the press-contact. The slot 11A is inserted into one of the slots 13a and 14a of the second press plate 14 of the block 11B and held (slot 13a of the first press plate 13 in the figure), and as shown in FIG. The block 11B is rotated from the hinge-like connecting portion 11C to lock and lock the lock hole 15a formed by the frame 15 at the tip with the lock claw 16 of the base 11A.
At this stage, the first pressure contact plate 13 and the second pressure contact plate 14 bite into the insulating coating of the electric wires W-1 and W-2.

Next, as shown in FIG.
A band portion 12A of the electric wire binding band 12 is inserted into the band insertion hole 11a of A, and the remaining electric wire W is fixed to the band portion 12A and the second pressure contact plate 14 of the pressure contact plate mounting block 11B. Is wound so as to be sandwiched between the outer surface on the opposite side, and locked by the band locking portion 12B, and band-tightened.

The remaining electric wires W are held by the press-contact member 11 by the band tightening of the band portion 12, so that the electric wires W-1 and W
2 and the second pressure contact plate 14 and the first pressure contact plate 13 are pressed together, and as shown in FIGS. 3 (D) and 4, the electric wires W held in the respective slots 13 and 14.
-1, W-2 insulation coating is the pressure contact blade 13 of the first pressure contact plate 13.
a and the pressing blade 14b of the second pressing plate 14 is cut by half of the outer peripheral surface, and as a result, the entire circumference of the insulation coating of the electric wires W-1 and W-2 is cut. As a result, the core wire c comes into contact with the press contact blades 13b and 14b, and the electric wires W-1 and W-2 are electrically connected to each other via the first press contact plate 13 and the second press contact plate 14. In this way, after forming the intermediate splice portion and binding the electric wires, in the work of attaching the wire harness to the vehicle body, the locking clamp 20 protruding from the upper surface of the base 11A of the press-contact member 11 is formed in the vehicle body. Into a locking hole (not shown).

As described above, when the splice forming device of the present embodiment is used, in the step of laying the wires constituting the wire harness and finally binding them, any wires W- which form the branch circuit at the same time as the wires are bound. 1, the insulation coating of W-2 is cut and electrically connected to each other via the press-contact plates 13 and 14. Therefore, it is not necessary to form a splice at the stage of temporary bundling, and the splicing is performed by the pressing blade cutting the insulating coating and coming into contact with the core wire c. A wire harness in which an intermediate splice portion is formed can be manufactured. In addition, since it is possible to prevent the electric wire to be spliced from loosening (slack) and unnecessary tension, it is possible to prevent the electric wire from being broken in an operation of assembling the assembled wire harness to the vehicle body.

In the above, the first pressing plate 13 of the pressing member 11 and the second pressing plate 13
The pressing plates 14 are pressed against each other, and the pressing blades 13b, 14b
Cuts the insulation coating of the electric wires W-1 and W-2 so that the electric wires W-1 and W-2 come into contact with the core wire and are spliced.
The electric wires W-1 and W-2 may be spliced by pressing the pressure contact block 11B with a special tool.

FIG. 5 and FIG. 6 show a second embodiment. The difference from the first embodiment is that a half plate for holding electric wires one by one without providing a press-contact plate on the lower outer surface of the base 11A. The point is that the circular accommodation groove 11e is formed by projecting integrally. As in the first embodiment, a pressure contact plate 14 made of a conductive metal material is fixed to the pressure contact block 11B.

In the second embodiment, the pressing block 11
B, the slot 14a of the pressure contact plate 14 is
1e, the press contact block 11 is positioned in correspondence with the electric wires W-1 and W-2, as in the first embodiment.
B is temporarily fixed to the base portion 11A, and the band portion 12A of the wire binding band 12 is inserted into the band insertion hole 1 of the base portion 11A.
1a, and tighten the band. As a result, the press-contact blades 14b on the inner peripheral edge of the slot 14a are connected to the electric wires W-1, W-2.
Cuts the insulation coating of the wire and comes into contact with the core wire, and the electric wires W-1, W-
2 are electrically connected to each other via a pressure plate 14.

In the above embodiment, the locking clamp 20 is provided on the upper surface of the base 11A of the press contact member 11, but as shown in FIG. 7, it is not always necessary to provide the locking clamp 20. . That is, as described above, in the present invention, unnecessary tension does not occur in the spliced electric wire. Therefore, in the case of the configuration shown in FIG. 7, when attaching the vicinity of the intermediate splice portion of the wire harness to the vehicle body, a band clamp may be separately wound around the intermediate splice portion of the wire harness. There is no risk of disconnection.

[0028]

As is apparent from the above description, when the splice forming device of the wire harness according to the present invention is used, a branch circuit is formed when the wires constituting the wire harness are wired and finally bound. The intermediate splice between the electric wires can be formed, and the working efficiency for manufacturing the wire harness can be improved. Also, since the splice is formed by the insulation displacement coating being cut by the press contact blade and coming into contact with the core wire, the dimensional change of the wire forming the intermediate splice portion hardly occurs, and the wire is sagged or slackened more than necessary. Can be prevented from occurring. Therefore, it is possible to reduce problems such as breakage of the electric wire at the time of assembling the wire harness to the vehicle body.

Further, since it is possible to prevent the electric wires from being twisted or unnecessarily tightened due to the formation of the intermediate splice portion, the band clamp can be wound around the intermediate splice portion, thereby increasing the degree of freedom in designing the wire harness. There are advantages.

[Brief description of the drawings]

1A and 1B show a splice forming device according to a first embodiment of the present invention, wherein FIG. 1A is a perspective view of a pressing member, FIG. 1B is a side view of the pressing member, and FIG. .

FIG. 2 is a view showing a first and second splice forming tool shown in FIG. 1;
It is an enlarged front view of a press contact plate.

FIGS. 3A to 3D are diagrams showing a wire splicing process using the splice forming tool.

FIG. 4 is an enlarged cross-sectional view of a main part showing a state in which electric wires are pressed by the press-contact plate.

FIG. 5 is a side view showing a splice forming device according to a second embodiment.

FIG. 6 is an enlarged cross-sectional view showing a state in which an electric wire is pressed by the splice forming device of the second embodiment.

FIG. 7 is a diagram showing a modification of the present invention.

FIG. 8 is a schematic diagram showing a conventional example.

FIGS. 9A and 9B are schematic diagrams showing problems of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Pressure contact member 11A Base 11B Pressure contact block 11C Hinge connection part 11C 11a Band insertion hole 11e Housing groove 12 Wire binding band 12A Band part 12B Band locking part 13 First pressure contact plate 14 Second pressure contact plate 13a, 14a Slot 13b , 14b Pressure contact blade W, W-1, W-2 Electric wire

Claims (3)

[Claims] 1. A pressing block protrudes from a base having a band insertion hole via a hinge, and both the base outer surface and one surface of the pressing block opposing each other when the hinge is bent and locked on the base. A pressure contact plate made of a conductive metal material and formed with a pressure contact slot at the tip and having an inner peripheral edge as a pressure contact blade is fixed, or the pressure contact plate is fixed to one of the pressure contact plates and a semicircular wire receiving groove is formed on the other. And a wire bundling band having a band locking portion formed at one end of the band portion. From the group of a large number of wires to be bound, the wire to be spliced is connected to the crimping block of the crimping member. While the spliced connection is carried out by the press contact plate through the space between the bases, the other electric wires are arranged on the outer surface of the press contact block of the press contact member, and the electric wire binding band passed through the band insertion hole of the press contact member is wound. A splice forming tool for a wire harness, wherein the splicing tool is configured to be fastened together with the spliced wire. 2. A pressing block is projected from a base having a band insertion hole via a hinge, and both the outer surface of the base and one surface of the pressing block opposed when the hinge is bent and locked on the base. Plate made of a conductive metal material and having a pressure-contact slot with an inner peripheral edge formed as a pressure-contact blade at the tip, or fixing the pressure-contact plate to one of them and forming a semicircular wire-receiving groove in the other. On the other hand, there are a press-contact member having a base provided with a clamp portion for locking to a vehicle body locking hole, and a wire binding band having a band locking portion formed at one end of the band portion. From the group of wires, the wires to be spliced are spliced with the press-contact plate through the press-contact block and the base of the press-contact member, while the other wires are arranged on the outer surface of the press-contact block of the press-contact member. ,Up A splice forming device for a wire harness, wherein a wire binding band passed through a band insertion hole of the pressure contact member is wound and fastened together with the spliced wire. 3. The pressure contact plate attached to the base and / or the pressure contact block is provided two in the width direction.
Alternatively, the electric wire splice forming tool according to claim 2.