JPH0412593B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a branch connection device whose components include an insulated wire having a compressed stranded conductor (hereinafter referred to as a compressed insulated wire) and a branch terminal having a slot. This branch connection device is used as a so-called junction box in the electrical wiring of a car, for example, and is particularly suitable for interconnecting low-voltage insulated wires (low-voltage wires for cars) among the wires that make up the wire harness. There is. [Prior art] Conventionally, as such a branch connection device, a seventh branch connection device has been used.
As shown in the figure, there is a method in which a branch terminal b having a slot c at one end and a male tab d at the other end is press-fitted into the device body a, and an electric wire w is press-fitted into the slot c (joint). Note that e is a connector receptacle that divides male tabs d protruding from the main body a of the device into groups, and f is an external connector that is fitted and connected to the connector receptacle e. The electric wire w to be press-fitted into the slot c above is as follows:
Conventionally, single-core copper wires, stranded wires plated together, or clustered stranded wires have been used. However, in the case of the clustered stranded wires used in general wire harnesses, the core wires collapse during pressure welding as shown in FIG. 8A, resulting in unstable contact and lack of reliability. In addition, with single-core wires and bulk-plated wires, the core wires do not collapse as shown in Figure 8 (b), and the contact state is stable, but flexibility is difficult, and when the cable is pulled out from the branch connection device and routed. Another problem is that it lacks durability when bent or subjected to vehicle vibration, and has poor workability. [Problems to be Solved by the Invention] An object of the present invention is to solve the above-mentioned problems and provide a branch connection device with high reliability of electrical connection, easy wiring of electric wires, and good workability. It is in. [Means for solving the problems] The configuration of the present invention will be explained based on the drawings.
In the figure, A is a branch connection device, 1 is a box-shaped main body of the device A, 6 is a branch terminal, 9 is a compressed insulated wire, and 10 is the back cover of 1. The box-shaped main body 1 is integrally molded from an insulating synthetic resin, and has a plurality of external connector holders 2 on the top wall, and a plurality of wire mounting grooves 4 at predetermined intervals on the bottom wall 3, which also serves as an insulating board. The grooves 4 are recessed in parallel, and a plurality of terminal press-fit holes 5 are formed in a matrix in a straight line vertically and horizontally. Note that the wire mounting groove 4 can be bent at right angles, detoured, or recessed according to a predetermined pattern as in a normal circuit. The branch terminal 6 is constructed by providing a feather-shaped slot 8 at one end of a male tab 7, and is integrally formed from a conductive sheet metal by punching and bending. The compressed insulated wire 9 is formed by compressing a normal stranded conductor to eliminate gaps between each strand, imparting rigidity, and making the wall thinner (reduced in diameter). Table 1 shows a comparison of the outer diameter of the compressed stranded wire and the outer diameter of the compressed stranded wire (see Japanese Patent Application No. 1981-1991).

[Effect]

In the present invention, since the compressed insulated wire 9 is used as described above, the core wire (compressed stranded wire conductor) 9a does not collapse in the slot 8 when the wire is press-fitted (joint), and sufficient contact pressure can be obtained (see Fig. 3). In addition, since the insulating sheath 9b is thinned, the insulating sheathing is reliably bitten into the sheath.On the other hand, when the conventional simple stranded wire 12 is used, as shown in FIG. 8 hardly bites into the insulation coating 12b on one side, and the contact state may become unstable.Furthermore, in the present invention, the core wire 9a of the compressed insulated wire 9
has appropriate rigidity, so when the wire 9 is placed and press-fitted into the wire press-fitting groove 4 as shown in Figure 1, the wire 9 bends less and maintains its straightness, making it easy to install and remove. Hateful. After the core wire 9a is press-fitted into the slot 8, the group of compression insulated wires 9 pulled out from one end (or end face) of the branch connection device A as shown in FIGS. It can be bent and bent freely, and the wiring work of the wire harness can be done in exactly the same way as ordinary insulated wires.Moreover, because of its moderate rigidity, even if external forces such as tensile force are applied to the wire 9, the wire harness can be easily wired in the slot. There is an advantage that the pressure contact portion 8 is not easily affected. [Embodiment] FIGS. 4 and 5 show other embodiments of the present invention. That is, bipolar branch terminals 14 and 15 having slots 8 at both ends are fixed to the main body 13, which also serves as an insulating substrate, by press-fitting or insert molding. The branch terminal 15 has one slot 8 on one end for base line connection.
_1. Three slots 8 ₂ on the other end for connecting accessory wires,
Although slots 8 ₃ , 8 ₄ are formed at predetermined intervals, the number of poles of the groups of slots 8 ₂ , 8 ₃ . . . for connecting accessory wires can be freely increased or decreased according to a preset circuit configuration. Thus, in the slots on the base line connection side of the branch terminals 14 and 15, as shown in FIG. Press-fit the attached wire 9' held in correspondence with the press-fit joint. As shown in FIG. 6, this holder 16 includes a main body 17 and a lid body 20 having a locking means (not shown).
In the central part of the main body 17, a wire mounting table 19 is provided with a vertically opened slit 18 into which the slot 8 enters, and on the inner surface of the ceiling wall of the lid body 20, a relief part 21 for the slot 8 is recessed. It has a configuration in which a plurality of wire insertion holes 22 are provided in the skirt portion. Therefore, the holder 1 is inserted through the relot 18.
6 into the group of slots 8 by a press device (not shown), a large number of attached wires 9' can be press-fitted into joints at once. [Effects of the Invention] The branch connection device of the present invention has a plurality of wire mounting grooves arranged in parallel at predetermined intervals on one surface of an insulating substrate, a plurality of terminal press-fit holes in these wire mounting grooves, and a desired terminal. A branch terminal having a slot at at least one end is press-fitted and fixed in the press-fit hole, and a compressed insulated electric wire having a compressed stranded conductor made by compressing a normal stranded conductor to a compression ratio of 5 to 20% is placed in the wire mounting groove. The compressed stranded wire conductor of the compressed insulated wire is press-fitted into the slot of the branch terminal to form a desired branch circuit. Since the compressed insulated wire is used, the following effects can be obtained. (1) When placing the compressed insulated wire in the wire placement groove of the insulated substrate, the rigidity of the compressed stranded conductor prevents the wire from bending and maintains its straightness, resulting in good workability. (2) Unlike ordinary stranded wires, it is a compressed stranded conductor, so the contact pressure with the slot is high and stable. (3) Once it is pressed into the slot, its shape is maintained due to its rigidity, so even if external forces such as tensile force are applied to the wire, it is less affected by it, and the electrical connection is highly reliable. . (4) Compressed insulated wires have appropriate flexibility and can be bent freely, so they can be easily wired in the same way as insulated wires made of ordinary stranded conductors.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the branch connection device according to the present invention in a separated state, and FIGS. 2a and 2b are an overview perspective view a showing the assembled state of FIG. Figures A and B are explanatory diagrams of the press-fitting state of the electric wire and slot according to the present invention and the conventional example, respectively. Figure 4 is a perspective view of another embodiment of the device of the present invention in a separated state, and Figure 5 is its assembled state. 6 is a cross-sectional view of the holder used in the device of the present invention,
FIG. 7 is a perspective view of the conventional branch connection device in a separated state, and FIGS. 8A and 8B are explanatory diagrams of the press-fitted state of the electric wire and the slot, respectively, according to the conventional example. A... Branch connection device, 1, 13... Box-shaped main body (insulating board), 4... Wire placement groove, 5... Terminal press-fit hole, 6, 14, 15... Branch terminal, 8... Slot , 9... compression insulated wire, 16... holder.

Claims (1)

[Claims] 1. A plurality of wire placement grooves are arranged in parallel at predetermined intervals on an insulating substrate, a plurality of terminal press-fit holes are provided in these wire placement grooves, and a branch terminal having a slot at at least one end is press-fitted and fixed into the desired terminal press-fit hole. At the same time, a normal stranded conductor is placed in the wire mounting groove at a compression ratio of 5 to 20.
%, and the compressed stranded conductor of the compressed insulated wire is press-fitted into the slot of the branch terminal to form a desired branch circuit. branch connection device.