JPH0723947U - Shrink tube for cable connection - Google Patents

Abstract

(57) [Abstract] [Purpose] The electrical connection of the low voltage power / communication cable
Shrink tube for cable connection that can protect from both mechanical side
Intended to provide [Structure] A reinforcing tube is attached to the center of the shrink tube. In particular, in the case of a room temperature shrinkable tube, SZ-shaped or spiral-shaped cuts are made on both sides of the reinforcing cylinder over an appropriate length. Also, if necessary, hot melt or an adhesive is applied to the inner sides of both sides of the shrink tube to improve waterproofness.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a kind of insulation / protection / waterproof cover used for electrically insulating or mechanically protecting / waterproofing a connection portion of a low-voltage power / communication cable.

[0002]

[Prior art]

 Conventionally, when connecting a low-voltage power cable, a shrink tube is previously inserted into one of the insulating cores or the sheath, and the conductor to be connected is inserted into the straight sleeve from the left and right. After compressing or crimping the linear sleeve, or by pouring solder into the linear sleeve to connect the conductors to each other, return the shrink tube inserted in advance onto the linear sleeve to shrink it. , Insulation processing and protection of the connection part were performed. However, in this method, the surface of the linear sleeve after compression, crimping or soldering has irregularities such as corners and projections, and if the shrink tube is directly coated on it, the irregularities will shrink. There was a problem that electric stress was concentrated on uneven parts due to intrusion of internal lightning, external lightning, etc. during driving, or intrusion of internal lightning, external lightning, etc., causing partial discharge, etc., and damaging the contracting tube. . In addition, in communication cables and the like, there is also a problem in that the connecting portion cannot be mechanically protected only by a contraction tube having a weak waist.

[0003]

[Problems to be solved by this device]

 This invention was made in order to solve the problems described in the conventional technology, and can sufficiently protect the connection part of low-voltage power / communication cable both electrically and mechanically, and it may be waterproof. The purpose of the present invention is to provide a shrink tube for cable connection having the above.

[0004]

[Means for Solving the Problems]

 A reinforcing tube having a predetermined size is attached to the center of a room temperature or heat-shrink tube expanded to a predetermined inner diameter. Further, in the case of a room temperature shrinkable tube, a reinforced cylinder having an SZ-shaped cut or a spiral cut as disclosed in, for example, Japanese Patent Application No. 1-89564 at both ends is appropriately provided. Mounting.

It is preferable that hot melt or an adhesive is applied to the inner surfaces of both ends of the shrinkable tube over an appropriate length.

[0006]

[Action]

 The reinforced cylinder acts as a protective layer that electrically and mechanically protects the connection, eliminating the conventional problems. In the case of a room temperature shrinkable tube, the cuts at both ends of the reinforcing tube are disassembled into a continuous string when one end is pulled outward, and when there are no cuts, the cuts automatically contract and insulate. Only the cylindrical portion that is in close contact with the core or the sheath and has no cuts remains as a reinforcing cylinder on the connection portion.

The hot melt or the adhesive applied to the inner surfaces of both ends of the shrink tube for a suitable length adheres the shrink tube to the insulator or the sheath, and prevents moisture from entering from the outside. Serves as a defense.

[0008]

【Example】

 Referring to the drawings showing an example of the embodiment of the present invention, a dimension having an inner diameter and a length (here, a predetermined dimension) capable of sufficiently covering the connecting portion is provided in the central portion of the contracting tube 1 expanded to a predetermined inner diameter. (Defined as)).

The shrinking tube 1 is of a type that shrinks by heating, that is, the heat shrinking tube and the expanded elastic tube are mounted in the expanded elastic tube in order to keep them as they are. There are two types, a room temperature shrink type that shrinks when the spacer is removed, but both types are applicable in the present application.

In the case of a room temperature shrinkable tube, a reinforcing cylinder having SZ-shaped or spiral cuts 3 at appropriate lengths is attached to both ends. In the case of a heat-shrink tube, in order to fix the reinforcing tube 2 to the center of the heat-shrink tube, as shown in FIG. The bulge is shrunk and brought into close contact with the reinforcing tube 2. If necessary, hot melt or adhesive may be applied to the inner surfaces of both ends of the shrinkable tube 1 over a suitable length. After applying the shrink tube 1 to the connecting portion, the finish is as shown in FIG. 3, for example. In addition, 4 shows an insulating core or a sheath.

[0011]

【effect】

 Since the present invention is configured as described above, it has the following effects.

Since the connecting portion is covered with the hard reinforcing cylinder, it is sufficiently protected electrically and mechanically.

In the case of a room temperature shrinkable tube, it is only necessary to pull the cut outwards and form a string to remove it, so that the processing of the connecting portion can be simplified.

When a hot melt or an adhesive is applied, the waterproof structure can be finished, so that the performance of the connection portion is stabilized and the life is extended. It has the above effects and its industrial utility value is high.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing another embodiment of the present invention.

FIG. 3 is a front view showing a state after applying a cable connecting shrink tube.

[Explanation of symbols]

 1 Shrink tube 2 Reinforcing tube 3 Cut 4 Insulating core or sheath

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Teruo Kobayashi 1-5-1, Kiba, Koto-ku, Tokyo Inside Fujikura Ltd.

Claims (2)

[Scope of utility model registration request] 1. A shrinkable tube (1) having an expanded inner diameter.
A shrinkable tube for cable connection, characterized in that a reinforcing tube (2) having a predetermined size is attached to the central portion of the tube. 2. A shrinkable tube for cable connection according to claim 1, characterized in that a reinforcing tube (2) having cuts (3) at appropriate lengths is attached to both ends.