JPH0357072Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a wire terminal portion that insulates the end of a main wire that is formed by connecting a plurality of branch wires to form a branch portion, and in particular, After cutting the insulated wire core, the outer sheath is inserted into the original position, and then a terminal protector is formed by molding, making it easy to perform the insulation process and improve the external finish. This invention relates to an electric wire terminal part which is made to be in good condition.

[Conventional technology]

An example of a wire that requires insulation treatment at the end of the wire is the wire branch shown in FIG. 3. This electric wire branching section connects a plurality of branching electric wires 1A to the main electric wire 1 using a branching section 6,
This is applied when power is supplied from one power supply section (not shown) to a plurality of loads using a plurality of branch wires 1A provided at predetermined intervals. Here, it is necessary to perform insulation treatment on the terminal end of the main electric wire 1, and conventionally, for example, it is as shown in FIG. 4. That is, a plurality of insulated wire cores 1a, 1b, and 1c are collected and twisted together, and a jacket 2 is applied to the outer periphery of the main wire 1.The jacket 2 of the main wire 1 is peeled off by a predetermined length to expose each insulated wire core. After changing the lengths of 1a, 1b, and 1c and cutting them at different levels, fitting the insulating cap 4 as shown in the figure and wrapping the tape 4a around the end of the insulating cap 4, pour two liquids into the insulating cap 4. The insulator 5 was provided by injecting a mixed type polyurethane resin with good fluidity and solidifying the resin. Thereby, the insulation of each insulated wire core 1a, 1b, 1c was maintained, and a wire end portion having mechanical strength and watertightness was formed.

[Problem that the invention attempts to solve]

However, according to the conventional electric wire terminal section, after cutting the insulated wire cores 1a, 1b, 1c, the insulating cap 4
The process is complicated, the work efficiency is poor, and the process of injecting and solidifying the resin is complicated. There are problems in that it takes time and productivity is low, and as a result, there is also the inconvenience that the price inevitably increases. In addition, the fixing force of the tape winding portion that fixes the insulating cap 4 varies, and furthermore, the resin injected into the insulating cap 4 leaks and adheres to the electric wires and the insulating cap 4, resulting in inconveniences such as improving quality. There were also problems such as deterioration of the workplace environment due to leaking resin.

[Means for solving problems]

This invention was made in view of the above, and aims to simplify the work process, improve productivity, and improve quality and work environment. The structure is such that the gap is filled, the outer sheath is peeled off to a predetermined length, the exposed insulated wire cores are cut to different lengths, and the insulated wire cores that remain after cutting are twisted together and the outer sheath is peeled off first. After fitting, an adhesive is applied to the outer periphery to provide an adhesive layer, and a terminal protector is integrally formed thereon by injection molding to provide an electric wire terminal section.

That is, the electric wire terminal portion of the present invention has a structure in which the outer sheath is made to have a sufficient space for twisting the insulated wire cores, and further,
The insulated wire core is fixed while maintaining a reliable insulation distance by fitting the peeled outer sheath onto the insulated wire core that has been cut into predetermined lengths at different levels. For example, if the outer sheath does not provide a sufficient gap between the insulated wire cores, the position of the insulated wire cores within the sheath will not be stable, and for example, the distance between the ends of the insulated wires will become closer due to bending, etc. There is a risk that this will occur, and it will be necessary to take some measures to avoid this. By stabilizing the position of each insulated wire core, it becomes possible to form the terminal protector by injection molding. Although it is not always necessary to provide an adhesive layer, its application is desirable in order to strengthen the bond between the terminal protector and the electric wire and improve watertightness.

Hereinafter, the wire terminal portion of the present invention will be explained in detail.

〔Example〕

Figures 1A and 1B show an embodiment of the present invention, in which a plurality of insulated wire cores 1a, 1b, and 1c are twisted together, and the interlacing gap created by the twisting is filled with vinyl chloride resin. A main line electric wire 1 is provided with a main line electric wire 1, an outer cover fitting part 2a is peeled off at a predetermined length at the terminal part of the main line electric wire 1, and is fitted after the insulated wire cores 1a, 1b, 1c are cut, It consists of an adhesive layer 2b formed by applying a hot-melt adhesive to the outer periphery of a predetermined end face of the electric wire 1 and the outer periphery of the jacket fitting part 2a, and a terminal protector 3 formed by injection molding. The hot melt type adhesive used for the adhesive layer 2b has a temperature range suitable to the temperature of the resin to be injection molded, for example, 70 to 80°C.

In the above configuration, the outer sheath 2 of the terminal to be subjected to insulation treatment of the main wire 1 is peeled off at a predetermined length to expose the insulated wire cores 1a, 1b, 1c, and the exposed insulated wire cores 1a, 1b, 1c are removed. Untwist the second
As shown in the figure, the peeled outer sheath 2 is attached to the outer periphery of the insulated wire cores 1a, 1b, and 1c, which are each cut to a predetermined length and then twisted back to their original state, as an outer sheath fitting part 2a. to be fitted. Since the jacket fitting part 2a has a wire core hole 2c in the shape of twisted insulated wire cores, the insulated wire cores 1a, 1b, 1 after the cutting process are
c can be easily fitted in the original twisted state. After fitting the outer sheath fitting part 2a, as shown in FIG.
An adhesive layer 2b is provided by applying a hot-melt adhesive to the outer periphery of the outer periphery and the outer periphery of the jacket fitting portion 2a.
Thereafter, the terminal protector 3 is formed by injection molding as shown in FIG. 1A. At this time, the adhesive layer 2b of the hot-melt adhesive melts due to the injected resin temperature and molding pressure, and the main wire 1 and the terminal protector 3
firmly adhere. By forming the terminal protector 3 into a cylindrical shape, the mechanical strength can be increased, and the adhesive layer 2b is solidified after forming, thereby preventing water intrusion between the main wire 1 and the terminal protector 3. can ensure the prevention of Note that the terminal protector 3 has a ring-shaped slit 3 in order to reduce deformation resistance.
A and a hole 3b are formed.

[Effect of idea]

As explained above, according to the electric wire terminal part of the present invention, the outer sheath is configured to fill the twisting gap created by twisting the insulated wire cores, and the insulation is exposed by peeling off the outer sheath for a predetermined length. Cut each wire core to a predetermined length at different levels, twist the insulated wire cores left after cutting, cover with the outer sheath that was removed earlier, and then apply adhesive to the outer periphery to form an adhesive layer. In addition, the terminal protector is integrally formed on top of it by injection molding, which simplifies the work process.
Productivity can be improved, and quality and work environment can be improved. In other words, since the peeled outer sheath is used for fitting, there is no need to use other terminal processing members such as insulating caps, the wire processing shape can be made smaller, and the shape and wall thickness of the terminal protector can be kept constant. Can be done. Furthermore, since it is integrally molded by injection molding, it is possible to standardize work, stabilize quality, and make the workplace more beautiful. Due to the above effects, it is possible to reduce the size of the wire terminal part, and
Improved insulation, improved external finish, and lower price can be achieved.

[Brief explanation of drawings]

FIGS. 1A and 1B are explanatory diagrams showing one embodiment of the present invention. FIG. 2 is an explanatory diagram of the outer jacket fitting part of the present invention. Third
The figure is an explanatory diagram of branch electric wires. FIG. 4 is an explanatory diagram of a conventional electric wire terminal section. Explanation of symbols, 1...Main wire, 1a, 1b,
1c...Insulated wire core, 2...Sheath, 2a...Sheath fitting part, 2b...Adhesive layer, 2c...Wire core hole, 3...
Terminal protector, 3a...slit, 3b...hole, 4
... Insulation cap, 5 ... Insulator, 6 ... Branch.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In the terminal portion of an electric wire consisting of a plurality of insulated wire cores twisted together and a sheath applied to the outer periphery of the wire core to fill the gaps between the twists, the termination positions may be different. a wire core termination portion made of the insulated wire core cut into a wire core; and the outer sheath removed over a predetermined length from the end portion of the wire, the outer periphery of the insulated wire core at the wire core termination portion. An electric wire terminal section comprising: a fixing member that fixes the insulated wire core by being returned to the wire; and a terminal protector molded from the fixing member to the outer sheath of the electric wire. (2) The utility model according to claim 1, wherein the terminal protector is adhesively integrated with an adhesive layer applied from one end of the outer sheath of the electric wire to the fixing member. Wire terminal section.