JPS6125178Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a cable connection portion with excellent watertightness.

Conventionally, when taking out a branch from the middle of a main cable, insulation treatment involves wrapping self-adhesive rubber tape, etc. around the conductor connection between the main cable and branch cable, and then mechanically protecting it. For this reason, boxes made of metal or synthetic resin have been adopted.

As an alternative to this, when a branch takeout section is planned in advance, a so-called prefabricated branching method is adopted in which the cable is branched in advance after the cable is manufactured and before installation.

In this prefabricated branch, the conductor connections between the main cable and the branch cable are molded and coated with vinyl resin using a vinyl injection molding machine at the factory, making them mechanically superior and watertight. It has several features.

However, all of these methods are not without their problems; for example, in the case of the former, construction is troublesome and the box storage method requires a large amount of space, and in the case of the latter, Because it requires a large molding machine, it has the disadvantage that it cannot be used when branching out cables after laying them on site.

In order to overcome these drawbacks, a so-called split-back insulation cover has been proposed, which has a shape corresponding to the molded covering and has slits. Since the cable can have physical strength, there is no need for a reinforcing box, and even after the cable is laid, it can be opened from the torn part and installed to perform the prescribed insulation treatment.

However, in the case of this method using an insulating cover, if the cutting margin is too large, it becomes difficult to seal the cable passage hole and the cover body, and a great deal of effort is required to obtain sufficient watertightness. Therefore, it is desirable to minimize the size of the cut and set the sealing distance as small as possible, but if the cut is made small, it will be difficult to pass the main cable and branch cables through and take in the conductor connections, and it will be difficult to attach the insulating cover. Therefore, the ease of work due to this method cannot be fully utilized.

The present invention solves the above-mentioned drawbacks of the conventional technology,
To provide a cable connection part which is improved so as to perform simple insulation treatment with excellent watertightness in a branched cable after the cable is laid.

That is, as shown in the accompanying drawings, the cable connection part of the present invention is a cable connection part insulated with an insulating cover so as to cover the branch connection part between the main cable 10 and the branch cable 11, and the insulating cover is A body part 1 is provided in the center in the axial direction, and has an internal cavity capable of accommodating a conductor connection part between the main cable and the branch cable, and a main cable passage hole is provided at one end side in the axial direction, in series with the body part. 1', and a main cable passage hole 1'' and a branch cable passage hole 1 are formed in series with the body part on the other end side in the axial direction.
A second diameter-reduced cylindrical part 2 is formed, each having a diameter-reduced cylindrical part 2 independently, and from these first diameter-reduced cylindrical parts 2' to the second diameter-reduced cylindrical part 2 via the body part 1. reaching the main cable passage hole of the first reduced diameter cylindrical part and the internal cavity of the body part, and the main cable passage hole and the branch cable passage hole of the second reduced diameter cylindrical part, respectively. Cut portions 4 and 5 are formed, and a protrusion 3 that protrudes outward is formed at a portion where the cut portion 5 is formed between the main cable passage hole and the branch cable passage hole in the second diameter-reduced cylindrical portion. The second diameter-reduced cylindrical part is provided with tightening bands 6, 7, and 8 which are wound around the outer circumference of the insulating cover so as to tighten the outer circumference including the protrusion. It is something.

Figures 1 and 2 show an embodiment of the insulating cover used in the connection part of the present invention, and show a first reduced diameter cylindrical part extending to the left of the body part 1 in the center of the drawing. 2' forms a circular shaft side portion concentric with the main cable passage hole 1' having a circular cross section.

On the other hand, the second diameter-reduced cylindrical part 2 extending rightward of the body part 1 is provided with a main cable passage hole 1'' having a circular cross section and a branch cable passage hole 1 in parallel. The side portion of the shaft is approximately elliptical in cross section.

A single cut section 4 is formed by continuously cutting the shaft side part from the first reduced diameter cylindrical part 2' through the body part 1 to the second reduced diameter cylindrical part 2.
A cut is made that reaches the main cable passage holes 1', 1'' and the internal cavity of the fuselage, and furthermore, in the second diameter-reduced cylindrical part, there is a cut between the main cable passage hole 1'' and the branch cable passage hole 1 that reaches both of these holes. A cleft portion 5 is formed, and a pair of arcuate projections 3 are formed on the outer surface of the shaft side portion of the portion where the cleft portion 5 is formed.

Now, the insulating cover shaped like this is
By opening from the cut portions 4 and 5 at the branch cable take-out portion of the main cable to form a roughly V-shape, the branch connection portion can be taken in and attached. Therefore, not only the main cable but also the branch cable can be inserted into the cable passage hole by pushing from the side, which greatly simplifies the work of attaching the cover.

FIG. 3 shows an embodiment of the cable connection part of the present invention which is constructed by attaching such an insulating cover. , a main cable 10 is installed in the internal space of the body part 1.
The main cable 10 is inserted into the through holes 1' and 1'' of both the first and second reduced diameter cylindrical parts, and the main cable 10 is inserted into the through holes 1' and 1'' of both the first and second reduced diameter cylindrical parts. Through hole 1 in cylindrical part 2
A branch cable 11 is inserted through the.

For the insulating cover installed in this way, tightening bands 6, 7, 8 are attached to the outer periphery of the first reduced diameter cylindrical part 2', the outer periphery of the body part 1, and the outer periphery of the second reduced diameter cylindrical part 2 on the shaft side part. By wrapping and tightening the
This enhances the close contact between each cable passage hole and the cable, and closes the cut parts 4 and 5 together.

Here, in the second diameter-reduced cylindrical part 2 through which the trunk cable and the branch cable are inserted, the tightening band 8 is attached to the protrusion 3.
By wrapping the wire in a pressing manner, a couple 9 is generated as shown by the arrow on the tear portion 5 that communicates the main cable passage hole and the branch cable passage hole, increasing the pressure welding action and ensuring a secure seal. Can be done. In this way, the difficulty in ensuring watertightness that tends to occur due to the large cutting margin has been improved by providing a protrusion on the part where the tightening band 8 is wrapped, which is almost equivalent to the insulation treatment using vinyl molding. Watertightness is obtained, and no extra sealing treatment is required.

However, in order to make the watertightness more stable, the cut parts 4, 5 and the cable passage holes 1', 1'', 1
This does not preclude applying a sealing material such as adhesive to the surface of the device in advance.

As is clear from the above explanation, the cable connection part of the present invention allows branching and insulation treatment to be performed easily and quickly at the cable installation site, and also ensures mechanical strength and watertightness comparable to vinyl molding. Yes, and its practical effects are significant.

[Brief explanation of the drawing]

1 and 2 are a front view and a right side view showing an embodiment of the insulating cover used in the present invention, and FIGS. 3 and 4 show an embodiment of the cable connection part of the present invention. They are a front view and a right side view. 1: Body part, 1', 1'': Trunk cable through hole,
1: Branch cable through hole, 2': First reduced diameter cylindrical part, 2: Second reduced diameter cylindrical part, 3: Projection, 4,
5: Tearing part, 6, 7, 8: Tightening band, 10: Main cable, 11: Branch cable, 12: Connector.

Claims (1)

[Scope of utility model registration request] In a cable connection portion insulated with an insulating cover so as to cover a branch connection portion between the main cable 10 and the branch cable 11, the insulating cover has a conductor connection portion between the main cable and the branch cable at the center in the axial direction. A first reduced diameter cylindrical part 2' having a main cable passage hole 1' is formed in series with the body part at one end in the axial direction. At the same time,
On the other end side in the axial direction, a second diameter-reduced cylindrical part 2 is formed which is connected to the body part and has a main cable passage hole 1'' and a branch cable passage hole 1, each independently. The main cable passage hole of the first reduced diameter cylindrical part and the main cable passage hole of the main body part extend over the entire axial length from the reduced diameter cylindrical part 2' of the body part 1 to the second reduced diameter cylindrical part 2. Cutting parts 4 and 5 are formed that reach the internal cavity and the main cable passage hole and the branch cable passage hole in the second reduced diameter cylindrical part, respectively, and further the main cable passage hole and the branch cable passage hole in the second reduced diameter cylindrical part are formed. A protrusion 3 that protrudes outward is formed in the portion where the cut portion 5 is formed between the branch cable passage hole, and is wound around the outer circumference of the insulating cover, and is wrapped around the second diameter-reduced cylindrical shape. In the part, a tightening band 6 is wrapped around the outer circumference including the protrusion so as to tighten it.
7. A cable connection portion comprising: 7 and 8.