JPH1064607A - Insulation cover device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove a band-shaped piece broken and led out without being caught by forming a groove in which a plastic core is broken in a zigzag shape by pulling a handle for the plastic core. SOLUTION: Plastic cores are broken in order along grooves 6, 6a, and 8b from a link part 7a on a depth side of a cover member by pulling a handle 7 axially of an insulation cover device, a band-shaped piece 5 is formed and is removed while it is zigzag-shaped from a contracting part to the outside. The band-shaped piece 5 is broken in the zigzag shape and taken so that the band-shaped piece 5 can be smoothly and easily removed without being caught by an insulation wire inserted into the cover member in winding state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating cover device used for a connection portion in a state where a sheath of an insulated wire is stripped, and more particularly to an improvement of a plastic core inserted at both ends of a cover member. It is.

[0002]

2. Description of the Related Art Conventionally, an insulating cover device using a shrink tube (for example, Japanese Utility Model Publication No. 2-1816) has been used to insulate and cover a connection portion of an insulated wire in a state where the coating is removed. As shown in FIG. 10, in this insulating cover device, a hollow cylindrical plastic core 102 is inserted inside an end portion 101a of a tubular cover member 101 constituting the insulating cover device 100, and the end portion 101a is moved in a radial direction. It is supported in an elastically expanded state. As shown in FIG. 10, the plastic core 102 has an axially spiral cut 102b formed in its outer peripheral surface 102a, and has a terminal (an opening of the plastic core 102 when inserted into the end 101a). (The side opposite to the end 102c), the pull 103 having the plastic core 102 partially peeled off along the cut 102b is protruded from the opening 102c side opposite to the terminal along the inner wall surface of the core 102. .

[0003] As shown in FIG. 11, the insulating cover device 100 inserts the connecting portion of the insulated wire 104 from which the coating has been peeled into the tubular cover member 101, and then protrudes toward the opening 102c. Is pulled in the direction of the arrow X (axial direction) in the figure, so that the plastic core 1
02 is sequentially broken along the spiral cut 102b provided on the outer peripheral surface from the back (the side opposite to the opening 102c), becomes a strip 105, and is gradually removed from the back of the cover member 101. . And plastic core 10
2 is removed, the end portion 101a of the tubular cover member 101 naturally contracts due to its elasticity, adheres tightly to the insulated wire 104, and insulates the connection portion of the insulated wire 104 from which the coating has been peeled off, as well as waterproof, dustproof, etc. Is made.

[0004]

However, in the above-mentioned conventional insulating cover device, by pulling the tab 103 protruding from the opening 102c side, the plastic core 102 inserted at both ends of the tubular cover member is moved to the outer periphery. Breaking along the spiral groove 102c provided on the surface, as shown in FIG. 12, the strip is removed from the end of the tubular cover member as a strip 105. At this time, the stripped strip 105 is Since the insulated wire 104 inserted into the cover member 101 is drawn in the axial direction, the wire is entangled with the insulated wire 104 and cannot be easily removed from the cover member.

[0005]

DISCLOSURE OF THE INVENTION The present invention is to solve the above-mentioned problems, and is in close contact with a covering portion (2a) for covering a connecting portion of an insulated wire (4) and an insulated wire (4). A cover member (2) provided with a contracting portion (2b), and a hollow cylindrical plastic core (3) for supporting the contracting portion (2b) in a radially expanded state. (2b) has an inner diameter smaller than the outer diameter of the insulated wire (4) in a non-tension state, and the plastic core (3) has an inner diameter larger than the outer diameter of the insulated wire (4); A tab (7) having a part stripped from the terminal of the core (3) and protruding along the inner wall surface of the core (3) from the opening (3b) opposite to the terminal along the inner wall surface of the core (3). And a peripheral surface (3) of the plastic core (3). ) To, is characterized in that the plastic core by pulling the pull tab (7) (3) has a groove (6) ~ (6 g) which is destroyed in a zigzag shape.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to an embodiment shown in FIGS.

FIGS. 1 to 6 show a first embodiment. In FIG. 1, reference numeral 1 denotes an insulating cover device according to the present invention, which comprises a cover member 2 and plastic cores 3 inserted at both ends thereof. The cover member 2 has a cover portion 2a provided at a central portion and both sides thereof. And a shrinkable portion 2b provided in the insulated wire 2a. The coating portion 2a is capable of storing therein a connection portion in a state where the coating of the insulated wire 4 is peeled off.

The contracted portion 2b is formed to have an inner diameter smaller than the outer diameter of the insulated wire 4 to be covered in a tensionless state, that is, in a state where the plastic core 3 is not inserted into the contracted portion 2b. Therefore, when the plastic core 3 is removed, the contracted portion 2b comes into close contact with the insulated wire 4 so that water, dust and the like do not easily enter from between the insulated wire 4 and the contracted portion 2b.

Here, the cover member 2 has mechanical strength,
The cover member 2 is made of a soft rubber material having excellent electrical insulation properties, weather resistance, etc., and having permanent elongation characteristics and compression set characteristics, such as ethylene propylene rubber, chloroprene rubber, butyl rubber, and silicone rubber. Shrinking part 2
b is integrally formed. The cover member 2
Alternatively, after the covering portion 2a and the contracted portion 2b are individually formed, the contracted portions 2b may be attached to both ends of the covering portion 2a.

The plastic core 3 has a hollow cylindrical shape as shown in FIG. 2, and has an inner diameter larger than the outer diameter of the insulated wire 4 to be covered. And the plastic core 3 is inserted inside the above-mentioned contraction part 2b,
The contracted portion 2b is expanded and supported in the radial direction by the outer peripheral surface 3a of the plastic core 3 in the same portion 2b.

The outer peripheral surface 3a of the plastic core 3, as shown in FIG. 2 (a), has a groove 6 for rupture so that when the core 3 breaks, the strip 5 becomes zigzag with respect to its circumference. 6a and 6b are formed. That is, the outer peripheral surface 3
one a groove 6 formed along the axial direction in a, a circumferential groove 6a which starts the other end 6a ₂ does not reach the grooves 6 from one end 6a ₁ is the groove 6, one end 6b ₁ is the groove 6 the other end 6b ₂ does not reach is more formed alternately consists of a circumferential groove 6b reaching the groove 6 and the groove 6a and the groove 6b in the axial direction. Due to such grooves 6, 6a, 6b, the strip 5 is caused to make substantially one turn around the circumference of the plastic core 3,
It is formed such that it is folded back as shown at 5a at point A in the drawing, and is further made substantially one round in the direction opposite to the above-mentioned one round, and is again folded at point B as shown at 5b, and this folding is repeated a plurality of times. These grooves 6, 6a, 6b are cut grooves from the outer peripheral surface 3a side as shown in FIG. 2 (b), and only a part thereof is connected by a remaining portion 3d which is easily separated.

A part of the plastic core 3 is peeled off from the terminal on the back side of the cover member 2 (the side opposite to the opening 3b of the plastic core 3) to form a strip along the inner wall surface of the core 3. A handle 7 protruding from the opening 3b opposite to the terminal is provided, and the plastic core 3 is covered by pulling the handle 7 in the axial direction of the insulating cover device 1 (the Y direction in the figure). The connecting portion 7a, which is located on the back side of 2, is broken along each of the grooves 6, 6a, 6b in order, becomes a strip 5, and is removed from the contracted portion 2b to the outside in a zigzag shape. .

At this time, the plastic core 3 is broken along the grooves 6, 6a, 6b to form a strip 5 and the contracted portion 2
In the case where the belt-like piece 5 is removed to the outside from the b, the strip 5 is not broken and taken out continuously in one direction with respect to the circumferential direction of the plastic core 3, but is taken out in a zigzag shape and taken out. The strip 5 can be removed smoothly and easily without being entangled in a wound state around the insulated wire 4 inserted in the cover member 2.

Here, the plastic core 3 is made of a material which can be easily peeled (broken) along the groove 6 into the strip 5 and which can withstand the contraction force of the contraction portion 2b, for example, polypropylene, polyethylene, polyvinyl chloride or the like. It is formed.

Next, a method of using the insulating cover device 1 of the present invention will be described. After using the insulated cover device 1 having a size suitable for the outer diameter of the insulated wire 4 to be covered, the cover device 1 is passed through one of the cut insulated wires 4 to be connected, and the insulated wire 4 is connected. Then, the insulating cover device 1 is shifted so as to accommodate the connection portion where the coating of the insulated wire 4 is peeled off inside the coating portion 2a provided on the cover member 2 of the insulating cover device 1. At this time, the insulated wire 4
By applying grease or the like to the connection part, the waterproofness can be further improved.

Then, a pull 7 extending from the opening 3b of the plastic core 3 inserted into the cover member 2 is pulled in the axial direction of the insulating cover device 1 (the direction of the arrow Y in FIG. 1), so that the outer periphery of the core 3 is removed. Grooves 6, 6a, 6 provided in surface 3a
Along the line b, the cover member 2 is sequentially broken from the back side, and becomes a strip 5 as shown in FIG. 4, and is zigzag removed from the contracted portion 2b to the outside. After the plastic core 3 is removed, the contracted portion 2b contracts and the insulated wire 4
To ensure waterproofness and electrical insulation.

FIGS. 7 to 9 show a second embodiment of the plastic core. 7 is a perspective view of the above embodiment as viewed from the same direction as FIG. 2A, FIG. 8 is a perspective view of the embodiment viewed from the opposite direction, and FIG. 9 is a developed view thereof.

The second embodiment is a modification of the above-mentioned grooves 6, 6a and 6b, and is a groove 6c for cutting out a handle 7 and a shaft for moving to a strip 5 which is separated from and connected to a connecting portion 7a of the handle 7. The groove 6d in the direction, the groove 6g separating from the adjacent strip 5a, the axial groove 6e for turning back to the strip 5a separated from and coming into contact with the strip 5, and the strip 5 from the turned strip 5a. A groove 6f for transitioning to the strip 5b located on the same peripheral surface, and a strip 5 separated from and in contact with the strip 5b.
As shown in FIG. 9, the grooves 6d, 6f, and 6e are formed in such a way that the grooves 6d, 6f, and 6e are turned around in the circumferential direction, and the tab 7 is pulled from the connecting portion 7a. 5 is broken and pulled out, then folded at the point a to break and pull out the strip 5a, and then moved to the strip 5b at point b to break and pull out the strip 5b. The strip 5c is broken at the point c, and the strip 5c is broken and pulled out. This is sequentially repeated, and the entire plastic core 3 is broken and removed in a zigzag manner.

In FIG. 9, reference numerals A to K indicate that the same reference numerals are connected to each other. In the second embodiment, similarly to the first embodiment, the strip to be pulled out does not become entangled with the insulated wire 4, and the strip can be drawn out smoothly. Further, in the second embodiment, since the groove 6e is circumferentially out of phase with the adjacent groove 6e, the adjacent groove 6e is reliably prevented from being continuously broken at the time of breaking at the groove 6e. Thus, zigzag breakage can be further ensured.

[0020]

According to the insulating cover device of the present invention, a groove is formed in the plastic core inserted into the contracted portions provided at both ends of the cover member so that the plastic core is broken in a zigzag shape by pulling the tab. Therefore, the strip that is broken and pulled out can be smoothly and easily removed from the contracted portion of the cover member without being entangled in a wound state around the insulated wire inserted into the cover member. Therefore, workability at the time of insulatingly coating the connection portion of the insulated wire is improved.

[Brief description of the drawings]

FIG. 1 is a front view of an insulating cover device according to the present invention.

FIG. 2 (a) is a perspective view of a plastic core of the present invention,
(B) is an enlarged sectional view of a groove in the core.

FIG. 3 is a diagram showing a state where an insulated wire is passed through the insulating cover device of the present invention.

FIG. 4 is a view showing a state in which a plastic core according to the present invention is removed.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is a front view showing a state in which the insulating cover device is in close contact with the insulated wire.

FIG. 7 is a perspective view showing another example of the plastic core according to the present invention, viewed from one side.

FIG. 8 is a perspective view of the plastic core of FIG. 7 viewed from the other side.

FIG. 9 is a development view of the plastic core of FIGS. 7 and 8;

FIG. 10 is a front view of a conventional cover device.

FIG. 11 is a perspective view of a conventional plastic core.

FIG. 12 is a view showing a state where a conventional plastic core is removed.

FIG. 13 is a diagram showing a state where a conventional cover device is in close contact with an insulated wire.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulation cover device 2 Cover member 2a Covering part 2b Shrinking part 3 Plastic core 3a Outer peripheral surface of plastic core 3b Opening 4 Insulated electric wire 5 Strip 6-6g Groove 7 Pull

Claims (1)

[Claims] An insulated wire (4) for covering a connecting portion of an insulated wire (4) and a shrinking portion (2) in close contact with the insulated wire (4).
b), a cover member (2) provided with
b) a hollow cylindrical plastic core (3) that supports the contracted portion (2b) in an expanded state in the radial direction.
The plastic core (3) has an inner diameter larger than the outer diameter of the insulated wire (4), and is partially stripped from the end of the core (3) to form a strip. (5) A handle having a handle (7) protruding from an opening (3b) on the side opposite to the terminal along the inner wall surface of the core (3), wherein a peripheral surface (3a) of the plastic core (3) is provided. ), Grooves (6) to (6g) in which the plastic core (3) is broken in a zigzag shape by pulling the handle (7).