JPS6125136Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an insulated wire that prevents conductor warping.

The lead wire of electrical equipment, for example, the cross-linked polyethylene wire for the lead, is coated with an insulating coating layer 1 as shown in FIG.
The conductor 2 is stripped off to expose a required length of the conductor 2 and connected to a terminal 3 of an electrical device.

When the insulation coating layer 1 is stripped off in this way, since the conductor strands are simply twisted concentrically, the outermost layer of strands changes from the solid line in Figure 1 to the broken line. It is easy to spread to the state shown,
It is easy to cause so-called conductor warp.

On the other hand, as shown on the right side of Fig. 1, the terminal 3 of the device has a diameter of the conductor insertion hole 4 formed inside so as to fit the diameter of the conductor 2 before expanding, and is made by crimping or compression. connected.

Therefore, if the conductor breaks, it cannot be inserted as shown by the arrow in FIG. 1, resulting in a drawback that work efficiency is significantly reduced.

The present invention has been made in view of the above-mentioned situation, and aims to provide an insulated wire that prevents conductor warp from occurring when the insulation coating layer is peeled off.

The conductor warp-preventing insulated wire of the present invention has a laminated tape composed of a tape made of a material that can be melted by heat, which will be described later, and a tape made of a material that cannot be melted by heat, which will be described later, on the meltable tape side. An insulating coating layer is formed on the outside of the conductor by directly wrapping it over the conductor, and the meltable tape melts the melting layer by the heat and crosslinking during extrusion of the insulating coating layer. The non-meltable tape is adhered to the insulating coating layer, and a portion of the meltable tape protrudes to the conductor side through the overlap of the non-meltable tape, causing the strands on the surface side of the conductor to form a spiral shape. It is fixed to.

Hereinafter, one embodiment of the conductor warp-preventing insulated wire of the present invention will be described with reference to FIGS. 2 to 4, where the same parts as in FIG. Fig. 2 is a cross-sectional view of the conductor 1 covered with the laminate tape 6 and the insulating coating layer 1, Fig. 3 is a front view of the insulated wire in Fig. 2 with the insulating coating layer 1 removed, and Fig. 4 The figure is a sectional view of the outer circumferential portion of the conductor shown in FIG. 3. Directly above the conductor 2, a laminate tape 6 consisting of a polyester layer 6a and a polyethylene layer 6b is formed by overlapping the polyester layer 6b with the polyethylene layer 6b facing outward.
An insulating coating layer 1 made of cross-linked polyethylene or rubber is extruded on the outside.

The polyethylene layer 6b of the laminate tape 6 is
The insulation coating layer 1 is melted by the heat during extrusion coating and the heat when crosslinking the insulation coating layer 1, and is fused to the insulation coating layer 1, and the laminate tape 6 and the conductor are bonded together by the steam or gas pressure during crosslinking. The conductors 2 flowing out from the minute gap 8 between the conductors 2 and 2 are fixed to each other. That is, as shown in the solid line in FIG. 3, the polyethylene layer 6b of the laminate tape 6 that has flowed into the gap 8 is stuck to the conductor 2 on which the insulation coating layer 1 has been peeled off and the laminate tape 6 has been wound in a spiral shape, as shown by the solid line. As shown in FIG. 4, the wires enter between the wires 5 on the outer peripheral side of the conductor 2 and fix the wires 5 to each other. Therefore, even when the conductor 2 from which the insulating coating layer 1 has been peeled off is inserted into the conductor insertion hole 4 of the terminal 3, the conductor does not warp as shown by the dotted line in FIG.

The amount of the polyethylene layer 6b that adheres to the conductor 2 can be adjusted by adjusting the thickness of the polyethylene layer 6b of the laminate tape 6 and the overlapping width when wrapping the tape.
It can be minimized to the extent that it does not adversely affect the connection with. Furthermore, since the force that causes the conductor 2 to spread is extremely small, the fixing effect can be expected if the polyethylene layer 6b is also slightly fixed.

Since the conductor warp prevention insulated wire of this example is constructed in this way, after stripping off the insulation coating layer,
When inserting a conductor such as a terminal into a hole, there is no need to press it, making the work easier and reducing the number of man-hours, and crimping or compressing the terminal etc. can be automated.

Furthermore, the diameter of the terminal insertion hole can be set smaller, and an improvement in the compression effect can be expected.

As described above, the conductor warp-preventing insulated wire of the present invention can prevent conductor warp from occurring when the insulation coating layer is peeled off, reducing the number of work steps and automating the crimping or compression work of terminals, etc. It is effective.

[Brief description of the drawings]

Figure 1 is an explanatory diagram of the insulated wire connection part where conductor warp has occurred, Figure 2 is a sectional view of the main part of an embodiment of the insulated wire to prevent conductor warp of the present invention, and Figure 3 is the end of the insulated wire in Figure 2. FIG. 4 is an enlarged cross-sectional view taken along the - arrow in FIG. 3; 1: Insulating coating layer, 2: Conductor, 5: Wire, 6: Laminate tape, 6b: Polyethylene layer.

Claims (1)

[Scope of utility model registration request] A laminated tape consisting of a tape made of a material that can be melted by heat as described below and a tape made of a material that cannot be melted by heat as described below is wrapped directly over a conductor with the meltable tape side facing outward. An insulating coating layer is formed on the outer periphery of the insulating coating, and the non-meltable tape is melted by the heat during extrusion molding and crosslinking of the insulating coating layer, and the non-meltable tape is melted by the heat during extrusion molding and crosslinking. The strands on the surface side of the conductor are fixed to each other in a spiral manner by a portion of the meltable tape that is adhered to the layer and protrudes to the conductor side through the overlap of the non-meltable tape. Insulated wire that prevents conductor from warping.