JPH1169594A - Insulated wire room-temperature heat shrinkable cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulated wire sleeve cover which can be attached and fixed to the connection part of insulated wires easily, and even if the insulated wire has a protrusion on its insulation, a work for removing the protrusion is eliminated at the time of connection for making connection work simple. SOLUTION: Both ends 10b and 10b' of a sleeve cover 10 is formed by molding of a room-temperature heat shrinkable material so as to have their diameters smaller than the outside diameters of wires 2 and 2' and the outside diameter of a conductor connection sleeve 1. A middle part 10a of the sleeve cover 10 is formed by molding of a non-shrinkable material to have its diameter larger than the outer diameter of the conductor connection sleeve 1. Both the ends are expanded beforehand through the insertion of cylindrical expanding collars 12 and 12', whose diameters are larger than the outside diameters of the insulated wires and the conductor connection sleeves. After the sleeve cover 10 has been transferred onto the conductor connection sleeve 1 with which the insulated wires are connected to each other and put on it, the expanding collars inserted into both the ends are pulled out so as to bind the ends of the sleeve cover tightly to achieve connection and moisture-proofness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sleeve cover used for a connecting portion of an insulated wire.

[0002]

2. Description of the Related Art A conventional method for forming a connection portion of an insulated wire will be described with reference to the drawings. FIG. 7 is a side view in which an upper half portion is a cross-sectional view showing an example of a state where a connection portion is covered with a sleeve cover and connected. That is, the ends of the left and right insulated wires 2, 2 'are respectively stripped off and the cable conductors 3,
3 'are exposed, these are inserted into the conductor connection sleeve 1, butted, and compressed and connected. Then, the sleeve cover 4 previously inserted into the insulated wire is disposed on the conductor connection sleeve 1 so as to be moved and covered, and a tape is provided between both ends of the sleeve cover 4 and the insulated wires 2 and 2 '. The waterproof layers 5, 5 'are formed by winding to perform connection and waterproof processing.

Another conventional example will be described with reference to FIGS. 8 and 9. FIG. FIG. 8 is a side view showing a configuration of a sleeve cover in which an upper half portion is a cross-sectional view, and FIG. 9 is a side view showing a state in which the sleeve cover is applied to a connection portion, in which an upper half portion is shown. That is, in FIG. 8, the entire cold-shrinkable sleeve cover 6 is previously placed on a cylindrical expansion collar 7 having an outer diameter larger than the inner diameter and expanded. And
This is inserted into one of the insulated wires 2 in advance, and the cable conductors 3 and 3 ′ of the insulated wires 2 and 2 ′ are connected to the conductor connection sleeve 1.
, And compress it before connecting. Next, as shown in FIG. 9, after being moved and arranged on the conductor connection sleeve 1 to which it is connected, the expanded tube collar 7 is folded and pulled to the right as shown by the arrow and pulled out, and the entire sleeve cover 6 is insulated. The insulated wire 2, the conductor connecting sleeve 1 and the insulated wire 2
′ Are connected in close contact with the respective surfaces.

[0004]

However, in the former method of connecting and waterproofing by winding the tape, the operation of winding the tape is very troublesome. Further, in the case of an insulated wire having small projections on a cable insulator, it is necessary to completely remove the projections on the cable insulator and finish the surface of the cable insulator smoothly in order to make the waterproof effect effective. If this operation is insufficient, a gap may be formed between the sleeve cover and the cable insulator, and the waterproof structure may be damaged. In addition, the latter method of covering the room-temperature shrinkable sleeve cover is excellent in that connection and waterproofing of the connection portion can be performed by a simple operation. In order to make the waterproof effect effective, it is necessary to remove the protrusions on the cable insulator and finish the surface of the cable insulator smoothly.If this work is insufficient, the sleeve cover and the cable insulator There was a gap between them, and there was a possibility that the waterproof structure might be damaged.

[0005] The present invention has been made in view of the above points, and is an insulated wire having a sleeve cover that can be easily attached and fixed to a connecting portion of the insulated wire, and further having a projection on a cable insulator. Even so, an object of the present invention is to provide a sleeve cover for an insulated wire that can simplify the operation by eliminating the operation of removing the protrusion at the time of connection.

[0006]

According to the present invention, both ends of the sleeve cover are made of a cold-shrinkable material smaller than the outer diameter of the electric wire and the outer diameter of the conductor connection sleeve, and the middle portion is made of a non-shrinkable material outside the conductor connection sleeve. Formed by molding larger than the diameter,
After inserting both ends of the cylindrical expansion pipe having a diameter larger than the outer diameter of the insulated wire and the outer diameter of the conductor connection sleeve in advance, expanding the pipe, and moving and disposing the collar on the conductor connection sleeve to which the insulated wire is connected, A cold-shrinkable cover for an insulated wire characterized in that the ends of the sleeve cover are tightly fastened to connect and waterproof by pulling out the expansion collars inserted at both ends. In addition, the present invention is characterized in that it has a pipe expansion collar that reinforces the tight tightening of the sleeve cover end to the insulated wire by inserting the pipe expansion collar removed from both ends of the sleeve cover into the outer periphery of both ends of the sleeve cover again. A cold shrinkable cover for insulated wires.After re-inserting the collar for tube expansion into both ends of the sleeve cover, the collar for tube expansion is deformed with a tool to tighten the tightness of the end of the sleeve cover to the insulated wire. A cold shrinkable cover for an insulated wire characterized by reinforcement.

[0007] A cold shrinkable cover for an insulated wire in which a sealing agent is applied to both inner surfaces of both ends of a cold shrinkable sleeve cover for an insulated wire to improve the adhesion to the insulated wire. A cold-shrinkable cover for an insulated wire, characterized in that projections are provided at the ends of the sleeve cover so that the pipe-expanding collars are reinserted into both ends of the cold-shrinkable sleeve cover for an electric wire and do not fall off.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view in which an upper half portion showing a configuration of a sleeve cover of one embodiment is a cross-sectional view.
That is, the sleeve cover 10 has an intermediate portion (a portion on the conductor connection cover to which the cable conductor is connected) 10a made of a non-shrinkable material having an inner diameter sufficiently larger than the outer diameter of the sleeve cover after connection, and both end portions 10b. , 10b 'are formed of a cold-shrinkable elastomer made of, for example, ethylene propylene rubber, silicone rubber, or the like, have an outer diameter smaller than the outer diameter of the cable conductor of the insulated wire, and have projections 10c, 10c' at their distal ends. It is formed and formed into a cylindrical shape. Then, as shown in FIG. 2, the sleeve cover 10 has two ends 10b and 10b 'in advance.
The inner diameter is sufficiently larger than the outer diameter of the insulated wire and the outer diameter of the conductor connection sleeve, for example, a cylindrical expansion collar 12, 12 made of metal, hard polyvinyl chloride, hard polyethylene, or the like.
Insert 'and expand the tube. At this time, it is preferable to apply a sealant 11, which is a rubber-plastic based glue, to the inner surfaces of both ends 10b, 10b 'of the sleeve cover 10.

FIG. 3 is a side view showing a state in which the above-mentioned sleeve cover 10 is put on a connection portion of an insulated wire, and a sectional view of an upper half portion. First, the sleeve cover 10 is inserted into one of the insulated wires 2 in advance. Next, the insulated wires 2, 2
The end portions on the connection side of 'are respectively stripped off to expose the cable conductors 3, 3'. And the cable conductors 3, 3 '
Are inserted into the conductor connection sleeve 1 so as to abut each other, and are compressed and connected. Next, the sleeve cover 10 is moved and arranged at this connection portion. This state is shown in FIG. Subsequently, the expanding collars 12, 12 'on both sides are pulled out to the left and right, respectively. Fig. 4 shows the right expansion collar 1
This shows the state when 2 'is pulled out. Then, the expansion collar 12 'is removed from the insulated wire 2'. Therefore, the sleeve cover 10 is in close contact with the outer peripheral surfaces of the insulated wires 2 and 2 ', can be connected by a simple operation, and has good waterproofness.

Next, another embodiment will be described with reference to FIGS. Expanding collar 1 drawn out in FIG.
2 and 12 ′ are kept as they are while being inserted through the insulated wires 2 and 2 ′. Then, this extracted collar for pipe expansion 1
2, 12 'again as shown in FIG.
(Only the right side is shown in the figure). Therefore, the both ends 10b and 10b 'of the sleeve cover 10 are reinforced by tightly tightening the insulated wires 2 and 2', and it is possible to perform a stronger connection and waterproofing. At this time, both ends 10b, 10b 'of the sleeve cover 10 after being attached to the insulated wires 2, 2'.
It is desirable that the dimensional relationship between the outer diameter of the tube and the inner diameter of the expansion collars 12 and 12 ′ be larger in the former. Alternatively, whether or not the above dimensional relationship is satisfied, the same effect can be exhibited by deforming the expanded tube collars 12 and 12 'again with a tool. Also, both ends 1 of the sleeve cover 10
Since the protruding portions 10c, 10c 'are formed at the tips of Ob, 10b', the re-inserted expansion collars 12, 12 '.
Never escape.

Another modification will be described with reference to FIG. The sleeve cover of this example is formed by providing an inner reinforcing layer 13 made of, for example, hard polyvinyl chloride, hard polyethylene, or a metal pipe on the inner surface of the intermediate portion 10a of a non-shrinkable material. Therefore, since the reinforcing layer is embedded and provided in the non-shrinkable portion of the sleeve cover, the strength is further improved, and it is possible to form a connection portion that is strong against external damage.

[0012]

As described above, according to the cold shrinkable cover for an insulated wire of the present invention, since the cold shrinkable portion is provided only at both ends of a necessary portion (a portion to be brought into close contact with the insulated wire), mounting work is not required. Extremely easy. In addition, since the pipe expansion collar is inserted again into the cold shrinkable cover end of the insulated wire, it is possible to prevent a decrease in waterproof performance due to a decrease in tightening force due to stress relaxation when the sleeve cover material is used alone, Moreover, the tightening force can be easily reinforced. Therefore, it is possible to contribute to improvement of the reliability of the connecting portion as a whole. Further, since the sealant in the sleeve cover is only in a portion that is in close contact with the insulated wire, the mounting operation such as pulling out the expansion collar is facilitated. Also, since the thickness of the sealant can be freely selected, even if the insulated wire has protrusions, it is possible to secure sufficient waterproofness without performing the smoothing work, greatly shortening the sleeve cover mounting work time. Can be shortened.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a sleeve cover according to an embodiment, in which an upper half portion is a cross-sectional view;

FIG. 2 is a side view showing a state in which an upper half portion of the sleeve cover of FIG. 1 is assembled;

FIG. 3 is a side view showing a state in which a sleeve cover 10 is placed on a connection portion of an insulated wire, and a cross-sectional view of an upper half portion;

FIG. 4 is a cross-sectional side view of the upper half showing the state when the right expansion collar is pulled out;

FIG. 5 is a side view showing a state in which a sleeve cover according to another embodiment is covered with a sectional view of an upper half portion;

FIG. 6 is a cross-sectional side view of an upper half showing a configuration of a sleeve cover according to a modification;

FIG. 7 is a side view showing an example of a conventional connection portion, in which an upper half portion is a cross-sectional view.

FIG. 8 is a side view showing a configuration of a conventional sleeve cover in a sectional view of an upper half portion,

FIG. 9 is an explanatory view showing a state in which the sleeve cover of FIG. 8 is put on a connection portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conductor connection sleeve 2, 2 'Insulated electric wire 3, 3' Cable conductor 4, 10 Sleeve cover 10a Intermediate part of sleeve cover 10b, 10b 'End of sleeve cover 10c, 10c' Projection 11 Sealant 12, 12 'For pipe expansion Color 13 Internal reinforcement layer

Claims (5)

[Claims] 1. An end portion of a sleeve cover is formed by molding a cold shrinkable material at both ends to be smaller than an outer diameter of an electric wire and an outer diameter of a conductor connection sleeve, and an intermediate portion is formed by molding a non-shrinkable material to be larger than an outer diameter of a conductor connection sleeve. At both ends, a tubular expansion collar larger than the outside diameter of the insulated wire and the outside diameter of the conductor connection sleeve is inserted in advance to expand the tube, and this is moved and placed on the conductor connection sleeve to which the insulated wire is connected. After that, by pulling out the expansion collar inserted at both ends,
A room-temperature shrinkable cover for insulated wires, characterized in that the ends of the sleeve cover are tightly fastened to connect and waterproof. 2. An expansion collar which reinforces the tight tightening of the sleeve cover end to the insulated wire by reinserting the expansion collar removed from both ends of the sleeve cover to the outer periphery of both ends of the sleeve cover. The cold-shrinkable cover for an insulated wire according to claim 1, wherein: 3. The method according to claim 3, wherein after the tube expansion collar is reinserted into both ends of the sleeve cover, the tube expansion collar is deformed by a tool to reinforce the tightness of the sleeve cover end to the insulated wire. A cold shrinkable cover for an insulated wire according to claim 2. 4. The room temperature for an insulated wire according to claim 1, wherein a sealant is applied to inner surfaces of both ends of the room temperature shrinkable sleeve cover for the insulated wire to improve adhesion to the insulated wire. Shrinkable cover. 5. The sleeve cover according to claim 2, wherein a projection is provided at an end of the sleeve cover so as not to fall off after reinserting the expansion collar at both ends of the cold shrinkable sleeve cover for the insulated wire. Item 5. A cold shrinkable cover for an insulated wire according to item 4.