JPH06141453A - Cable-connection/terminal-treatment insulating tube with built-in diameter-expanding liner and assembling method for cable-connection part or terminal-treatment part - Google Patents

Abstract

PURPOSE:To provide a cable-connecting/terminal-treating insulating tube wherein it is not required to make the step-stripped part of a cable sheath long, a 'contraction forgetting phenomenon' by which the rubber of the insulating tube relaxes a stress and is not contracted up to a state prior to the expansion of a diameter is not caused and a diameter-expanding liner has been built in and to provide the assembly method, of a cable-connecting part or a terminal-treating part, which uses the insulating tube. CONSTITUTION:A liner 1d is installed inside an insulating tube 1 formed of an elastic insulating material. When the insulating tube is inserted into, and attached to, a cable-conductor connecting part 6, the liner 1d is pulled out from the insulating tube 1 and the diameter of one end or both ends of the insulating tube 1 is expanded. Then, the insulating tube 1 is inserted into a cable sheath 2 for a cable, on one side, in which a cable conductor 4 has been exposed, and one pair of cable conductors 4 are connected. Then, the insulating tube 1 is moved up to the cable-conductor connecting part 6, the nesting box 1d is pulled out, the diameter-expanded part of the insulating tube 1 is contracted and the insulating tube 1 is inserted into, and attached to, the cable-conductor connecting part 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating tube having a diameter-expanding nest incorporated therein for connection of power cables or terminal treatment, and a method of assembling a connecting portion using the insulating tube. Alternatively, the present invention relates to an insulating cylinder that incorporates a diameter-expanding insert that does not require lengthening a stripped portion of the cable in the terminal treatment, and a method of assembling a connecting portion using the insulating cylinder.

[0002]

2. Description of the Related Art FIG. 6 is a view showing a conventional method for assembling a cable connecting portion. FIG. 6 (a) shows a state before a connecting component is attached to a cable conductor connecting portion, and FIG. Shows the state of. In the figure, 61 is an insulating cylinder formed of a rubber-like elastic member, 62 and 62 'are cable sheaths, 63 and 63' are cable insulators, 64 and 6
4'is a cable conductor, 65 is a sleeve for connecting the cable conductor, and 66 is a waterproof insulating tape or a shrink tube.

In FIG. 6, when assembling the cable connecting portion, the cable sheath 62 is replaced by the rubber-like connecting part 6.
Strip the length of 1 or more to expose the cable insulator 63, and strip the tip of the cable insulator 63 to expose the cable conductor 64. Then, as shown in FIG.
The insulating tube 61 is inserted into the cable insulator 63. Next, the sheath 62 ′ and the cable insulator 63 ′ are stripped off, and the exposed cable conductor 64 ′ and cable conductor 64 are removed by the sleeve 6
Connect by 5.

Then, as shown in FIG. 6 (b), the insulating cylinder 61 is slid onto the sleeve 65, the insulating cylinder 61 is inserted and attached, and the exposed cable insulator 63 is covered with a waterproof insulating tape or a shrinkable tube. It is covered with 66 to form a waterproof layer. In the method of assembling the cable connecting portion shown in FIG. 6, since the insulating tube 61 is mounted on the connecting portion of the cable conductor, it is necessary to strip the cable sheath 62 by the same length as the insulating tube 61. Therefore, as shown in FIG. 6B, after sliding the insulating tube 61, the exposed cable insulator 63 must be covered with a waterproof insulating tape or a shrink tube 66.

In order to solve the above-mentioned problems, the insulation cylinder is expanded in diameter from the sheath diameter and inserted into the cable, and after connecting the cable conductor, the expanded insulation cylinder is placed on the cable conductor connecting portion. There is known a method in which the diameter-expanding member is slid off and the insulating cylinder is attached to the cable connecting portion (see Japanese Patent Application No. 2-125527). FIG. 7 is a diagram showing the above-mentioned second conventional example. In FIG.
Is an insulating cylinder made of a rubber-like elastic body to be attached to the cable connection portion, 72 is a cable sheath, and 73 is a member such as a spirally wound plastic used for expanding the diameter of the cable connection portion 71. It is the formed core.

In FIG. 7, in order to attach the insulating cylinder 71 to the cable connecting portion, a core 73 is attached inside the insulating cylinder 71 to expand the diameter of the insulating cylinder 71 in advance, and the insulating cylinder 71 with the core 73 is connected to the cable. Slide it onto the department. Next, the core 73 is removed and the insulating cylinder 71 is contracted, and the insulating cylinder 71 is attached to the cable connecting portion.

[0007]

In the method of assembling the cable connecting portion shown in FIG. 6, the cable sheath is stripped by the same length as the insulating tube and the insulating tube is moved onto the cable sleeve as described above. It was necessary to cover the stripped portion with insulating tape or shrink tubing for protection and waterproofing after installation.

That is, in the method of assembling the connecting portion shown in FIG. 6, it is necessary to strip the step of the cable / sheath, and the length of the connecting portion becomes long. To protect the stepped part and restore the waterproof function,
There is a drawback that a coating process is required. On the other hand, in order to improve the above-mentioned drawbacks, as shown in FIG. 7, the diameter of the insulating cylinder is expanded in advance with a core or the like, and the expanded insulating cylinder is slid on the cable conductor connecting portion to remove the insulating cylinder. Although a method of assembling a connecting portion to be attached is also known, in the method shown in FIG. 7, since the rubber-like insulating cylinder is expanded in diameter by a core or the like in advance, if it is left in this state for a long time, it is added to the rubber of the insulating cylinder. Due to the stress, the rubber of the insulating cylinder causes stress relaxation, and there is a drawback in that the insulating cylinder does not contract to the state before the diameter expansion, that is, "forgetting to contract".

The present invention has been made in order to solve the above-mentioned drawbacks of the prior art, and it is not necessary to lengthen the stepped portion of the cable sheath, and the rubber of the insulating cylinder causes stress relaxation and forgets to contract. It is an object of the present invention to provide an insulating tube for cable connection / terminal processing that incorporates a diameter-expanding nest and a method for assembling a cable connection section or terminal processing section using the insulating tube that does not occur.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention is formed from an elastic insulating material having high tear strength and elongation and low compression set, and the inner diameter of which is a cable.・ First larger than the outer shape of the sheath
And a tubular portion integrally formed with the first tubular portion, the tubular portion having an inner diameter smaller than the outer diameter of the cable insulating portion provided on one side or both sides of the first tubular portion. A cylindrical material whose length is shorter than the length of the first cylindrical portion of the insulating cylinder and whose inner diameter is larger than the outer shape of the cable / sheath. One or two nests are provided, and one end or both ends of the insulating cylinder can be expanded by pulling out the nest.

According to a second aspect of the present invention, a cable in which the sheath and the insulator of the pair of power cables are removed to expose the conductors to connect the conductors to each other, and the insulating tube is inserted and attached onto the cable conductor connecting portion. In the connecting portion assembling method, a first tubular portion formed of an elastic insulating material having high tear strength and elongation and low compression set and having an inner diameter larger than the outer diameter of the cable / sheath, and the first tubular portion Deformation due to the elasticity of the insulating cylinder into an insulating cylinder having integrally formed second and third cylindrical portions having inner diameters smaller than the outer shape of the cable insulating portion provided on both sides of the first cylindrical portion. Inserting one or two cylindrical nests formed of a material having a strength not to be affected, the length of which is shorter than the length of the first cylindrical portion of the insulating cylinder and the inner diameter of which is larger than the outer shape of the cable / sheath, Make sure that the above When inserting the tube, pull out the nest from the insulating tube to expand one end or both ends of the insulating tube and expand the one end or both ends of the insulating tube to connect the cable sheath and the cable. After removing the insulator and exposing the cable conductor, insert it up to the cable sheath of one cable, connect a pair of cable conductors, and then install an insulating tube with one end or both ends expanded above the cable conductor connection part. To
By removing the insert and contracting the expanded diameter portion of the insulating cylinder, the insulating cylinder is inserted and attached onto the cable conductor connecting portion.

According to the third aspect of the present invention, the sheath and the insulator of the power cable are removed to expose the conductor, and the exposed conductor is connected to a terminal treatment conductor such as a terminal, and the conductor is connected to the cable conductor connecting portion. In a method for assembling a cable end treatment part in which an insulating tube is inserted, a first tubular part formed of an elastic insulating material having high tear strength and elongation and low compression set and having an inner diameter larger than that of a cable sheath outer shape. A second tubular member integrally formed with the first tubular portion and having an inner diameter smaller than the outer shape of the cable insulating portion provided on one side of the first tubular portion.
Is formed of a material having a strength that is not deformed by the elasticity of the insulating cylinder, the length of which is shorter than the length of the first cylindrical portion of the insulating cylinder, and the inner diameter of which is smaller than that of the first cylindrical portion of the insulating cylinder. cable·
Insert one cylindrical insert that is larger than the outer shape of the sheath, and when inserting the insulating cylinder into the cable end processing section, pull out the insert from the insulating cylinder to expand one end of the insulating cylinder and Insert the expanded insulation tube up to the cable sheath of the cable where the cable sheath and cable insulator are removed and the cable conductor is exposed for cable connection, and the cable conductor is used as a terminal treatment conductor such as a terminal. After connecting, move the insulation tube with one end expanded to the cable conductor connection part, remove the nest, and contract the expansion part of the insulation tube to place the insulation tube on the cable conductor connection part. It is designed to be inserted.

[0013]

According to the first aspect of the present invention, the first tubular portion is made of an elastic insulating material and has an inner diameter larger than the outer diameter of the cable / sheath, and is integrally formed with the first tubular portion. Formed in a material having a strength not to be deformed by elasticity of the insulating cylinder in an insulating cylinder having a cylindrical portion having an inner diameter smaller than the outer shape of the cable insulating portion provided on one side or both sides of the first cylindrical portion Since the length is shorter than the length of the first cylindrical portion of the insulating cylinder and one or two cylindrical nests whose inner diameter is larger than the outer diameter of the cable / sheath are provided, the cable connecting portion or the cable end treatment is performed. When assembling the parts, one end or both ends of the insulating tube can be expanded by pulling out the above-mentioned nest, the length of the cable step stripping part can be shortened, and the step stripping part can be protected and waterproofed. It is possible to shorten the coating process portion.

According to the second aspect of the present invention, the sheath and the insulator of the pair of power cables are removed to expose the conductors so that the conductors are connected to each other, and the insulating cylinder is inserted and attached onto the cable conductor connecting portion. In the method for assembling a cable connecting portion, since the cable connecting portion is processed using the insulating cylinder of claim 1, when the cable is connected, the length of the cable step stripping portion is set similarly to the invention of claim 1. In addition to being able to shorten the length, it becomes possible to shorten the coating treatment portion for protecting the stepped portion and for waterproofing.

According to the third aspect of the present invention, the sheath and the insulator of the power cable are removed to expose the conductor, and the exposed conductor is connected to a terminal-treated conductor such as a terminal,
A method of assembling a cable terminal processing part, wherein an insulating tube is inserted and attached on a cable conductor connecting part, using the insulating tube according to claim 1.
Since the cable end treatment is performed, when performing the cable end treatment, the length of the cable step stripped portion can be shortened and the step stripped portion is protected and waterproofed as in the case of the invention of claim 1. It is possible to shorten the processing part.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing a first embodiment of the present invention, and FIG. 1 (a) is a diagram showing an insulating tube before being attached to a cable,
The figure (b) is a figure which shows the state of the insulation pipe | tube when inserting in a cable, and the figure (c) is a figure which shows the state which inserted the insulation pipe | tube in the cable. In the figure, 1 is an insulating tube, 1a and 1b are semiconductive layers, 1c is an insulating layer formed from an elastic member such as silicon rubber or ethylene / propylene rubber, and 1d.
Is a nest formed of, for example, nylon, polycarbonate, polyethylene, or the like. Also, 2, 2'is a cable sheath, 3, 3'is a cable insulator, 4,
4'is a cable conductor, 5 is a sleeve, and 6 is a semiconductive sleeve cover.

To assemble the cable connecting portion according to this embodiment, first, as shown in FIG. 1 (a), the nest 1d is inserted inside the insulating tube 1. Next, the cable sheaths 2 and 2'are strongly peeled off by half the length of the insulating tube 1, the cable insulators 3 and 3'are exposed, and the tip ends of the cable insulators 3 and 3'are stripped off to form a cable conductor. Expose 4,4 '. Then, as shown in FIG. 1 (b), the nest 1d
As shown in FIG. 2B, half is pulled out, one end of the insulating cylinder 1 is expanded, and the insulating cylinder 1 is inserted into the cable insulator 3. The cable conductors 4 and 4'are then connected by a sleeve 5 and covered by a semiconductive sleeve cover 6.

Then, as shown in FIG. 1 (c), the insulating cylinder 1 is slid onto the sleeve cover 6 to insert the nest 1.
Pull out d, contract the insulating cylinder 1, and insert the insulating cylinder 1 on the sleeve cover 6. The nest 1d that has been pulled out is removed from the cable by splitting it vertically. Also, the insulating cylinder 1
A ground wire or the like is wound on the insulating tube so as to connect the cables and sheaths on both sides of the cable, and the insulating tube 1 and the cable / sheath 2 are covered with a waterproof insulating tape or a shrink tube as shown in the conventional example. Then form a waterproof layer.

2 to 4 are views showing a second embodiment of the present invention, and this embodiment shows an embodiment in which the present invention is applied to a cable terminal. 2 to 4, FIGS. 2 (a) and 2 (b) are views showing an insulating cylinder in which a nest is inserted,
FIG. 2 (c) is a view showing a state in which the insulating cylinder having the nest inserted is attached to the cable, FIG. 3 (a) shows a state in which the nest is removed from the insulating cylinder, and FIG. 3 (b) shows the insulating cylinder. The figure which inserted the 2nd insulating cylinder in the attached cable, and FIG. 4 is a figure which shows the completed cable terminal.

2 to 4, the same parts as those in FIG. 1 are designated by the same reference numerals, and 1 is an insulating cylinder 1a,
1b is a semiconductive layer, 1c is an insulating layer formed of an elastic member such as silicon rubber or ethylene / propylene rubber, and 1d is, for example, nylon or polycarbonate.
A nest 1e is made of polyethylene or the like.
It is a thread for pulling out d. In addition to the thread, a band-shaped body can be used as the nesting member. Reference numeral 2 is a cable sheath, 3 is a cable insulator, 4 is a cable conductor, 5 is a sleeve, 7 is a terminal connected to a terminal portion of a device, and 8 is a ground wire. Further, in FIGS. 3B and 4, 10 is a waterproof insulating tape or shrink tube covering the insulating cylinder 1 and the cable sheath, 11 is a second insulating cylinder, 11a and 11b are semiconductive layers, and 11c. Is an insulating layer.

Next, a method of assembling the cable terminal of this embodiment will be described with reference to FIGS. First, as shown in FIG. 2 (a), the insert 1 d to which the withdrawing thread 1 e is attached is inserted into the insulating cylinder 1. Next in FIG.
As shown in (b), the thread 1e is pulled to insert the nest 1 of the insulating cylinder 1.
Half of d is pulled out, and one of the insulating cylinders 1 is expanded in diameter.

On the other hand, as described above, the cable sheath 2
Is stripped off about half the length of the insulating tube 1 to expose the cable insulator 3, and the tip end of the cable insulator 3 is stripped off to expose the cable conductor 4. Next, after inserting the insulating cylinder 1 shown in FIG. 2 (b) into the cable, the sleeve 5 in which the terminal 7 is provided on the cable conductor 4 as shown in FIG. 2 (c).
Is attached by means such as crimping.

Next, as shown in FIG. 3 (a), the thread 1e is pulled and the nest 1d is pulled out. As a result, the insulating cylinder 1 contracts as shown by the arrow in the figure and comes into close contact with the cable insulator 3. The nest 1d that has been pulled out is removed from the cable by splitting it vertically. Next, the space between the insulating cylinder 1 and the cable / sheath 2 is covered with a waterproof insulating tape or a shrinkable tube 10.

After the insulating tube 1 is attached to the cable as described above, the second insulating tube 11 is inserted into the cable to which the terminal 7 and the insulating tube 1 are attached, as shown in FIG. 3 (b). . Then, as shown in FIG. 4, after attaching the terminal 12 of the device or the like to the terminal 7 with screws or the like, the second insulating cylinder is slid onto the insulating cylinder 1 to obtain a cable terminal as shown in FIG. .

In the above embodiments, one nest is inserted in the insulating cylinder 1 and one end of the insulating cylinder 1 is expanded in diameter. However, two nests are provided in the insulating cylinder 1. It is also possible to expand the diameter of both ends of the insulating cylinder 1 by pulling out the insert from both sides of the insulating cylinder. FIG. 5 is a diagram showing the above embodiment, in which the same components as those shown in FIG. 1 are designated by the same reference numerals, and 1 is an insulating cylinder, 1a, 1b.
Is a semiconductive layer, 1c is an insulating layer, and 1d and 1d 'are first and second nests.

In the same figure, when the diameter of the insulating cylinder 1 is expanded, both sides of the first and second inserts 1d and 1d 'are shown in FIG.
The insulating cylinder 1 can be expanded in diameter by attaching a thread or the like as shown in and pulling the thread from both sides.

[0027]

As is apparent from the above description,
In the present invention, the first tubular portion is made of an elastic insulating material and has an inner diameter larger than the outer diameter of the cable / sheath, and is integrally formed with the first tubular portion. Second with an inner diameter smaller than the outer diameter of the provided cable insulation
And a third cylindrical portion, the insulating cylinder is formed of a material having a strength that is not deformed by the elasticity of the insulating cylinder, and the length thereof is shorter than the length of the central portion of the insulating cylinder. Since one or two cylindrical inserts larger than the outer shape of the cable / sheath are provided, when assembling the cable connection part or the cable end processing part, one end or both ends of the insulating tube should be expanded by pulling out the inserts. Therefore, the length of the stripped portion of the cable can be reduced to about half the length of the conventional cable, and the coating treatment portion for protecting the stripped portion and waterproofing can be shortened. Also,
When inserting the insulating tube into the cable, it is not necessary to apply an excessive force, and the work can be facilitated.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a view (continuation) showing a second embodiment of the present invention.

FIG. 4 is a view (continuation) showing a second embodiment of the present invention.

FIG. 5 is a view showing another embodiment of the insulating cylinder.

FIG. 6 is a diagram showing a conventional example.

FIG. 7 is a view showing a conventional example in which a core for expanding the diameter is attached to an insulating cylinder.

[Explanation of symbols]

1 Insulation cylinder 1a, 1b, 11a, 11b Semi-conductive layer 1c Insulation layer 1d Nest 1e Thread for pulling out the nest 2 Cable / sheath 3 Cable insulator 4 Cable conductor 5 Sleeve 6 Semi-conductive sleeve / cover 7 Device terminals Terminal 8 to be connected to the part 8 Ground wire 10 Waterproof insulating tape or shrink tube 11 Second insulating cylinder 11a, 11b Semi-conductive layer 11c Insulating layer

Front Page Continuation (72) Inventor Kosho Kashimoto 2-6-1, Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Inventor Satoshi Yamaguchi 1-3-1, Uchiyuki-cho, Chiyoda-ku, Tokyo Higashi Within Kyodensha Co., Ltd. (72) Inventor Shigeki Yoshida 1-3-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Tokyodenki Co., Ltd.

Claims (3)

[Claims] 1. A first tubular portion formed of an elastic insulating material having high tear strength and elongation and low compression set, and having an inner diameter larger than that of a cable / sheath outer shape.
An insulating tube having a tubular portion integrally formed with the tubular portion of the first tubular portion and having an inner diameter smaller than the outer shape of the cable insulating portion provided on one side or both sides of the first tubular portion; A cylindrical shape whose length is shorter than the length of the first tubular portion of the insulating tube and whose inner diameter is larger than the outer shape of the cable / sheath. Or two inserts, wherein one end or both ends of the insulating cylinder can be expanded in diameter by pulling out the insert, and an insulating cylinder for cable connection / terminal treatment having a diameter expanding insert. 2. A method for assembling a cable connecting portion, wherein a sheath and an insulator of a pair of power cables are removed to expose the conductors, the conductors are connected to each other, and an insulating cylinder is inserted on the cable conductor connecting portion. And a first tubular portion formed of an elastic insulating material having a high elongation rate and a low compression set and having an inner diameter larger than the outer diameter of the cable / sheath, and the first tubular portion integrally formed with the first tubular portion. Formed of a material that is strong enough not to be deformed by the elasticity of the insulating cylinder in the insulating cylinder having the second and third cylindrical portions having inner diameters smaller than the outer shape of the cable insulating portion provided on both sides of the cylindrical portion. And the length is shorter than the length of the first cylindrical portion of the insulating cylinder,
Insert one or two cylindrical inserts whose inner diameter is larger than the outer diameter of the cable / sheath, and pull out the inserts from the insulating tube when the insulating tube is inserted into the cable connecting portion. Insert an insulating tube with both ends expanded and one end or both ends expanded into the cable sheath of one cable with the cable conductor and cable conductor exposed by removing the cable sheath and cable insulator for cable connection. Then, after connecting the pair of cable conductors, by moving the insulating cylinder whose one end or both ends have been expanded to above the cable conductor connecting portion, by removing the nest and contracting the expanded part of the insulating cylinder, A method for assembling a cable connecting portion, characterized in that an insulating tube is inserted and attached on the cable conductor connecting portion. 3. A cable terminal in which a sheath and an insulator of a power cable are removed to expose a conductor, the exposed conductor is connected to a terminal-treated conductor such as a terminal, and an insulating tube is inserted on the cable conductor connecting portion. In the processing portion assembling method, a first tubular portion formed of an elastic insulating material having high tear strength and elongation and low compression set and having an inner diameter larger than the outer diameter of the cable / sheath, and the first tubular portion A material that is strong enough not to be deformed by the elasticity of the insulating cylinder in an insulating cylinder that is integrally formed and has a cylindrical portion having an inner diameter smaller than the outer diameter of the cable insulating portion provided on one side of the first cylindrical portion. And the length is shorter than the length of the first cylindrical portion of the insulating cylinder,
When inserting one cylindrical insert whose inner diameter is larger than the outer diameter of the cable / sheath, and inserting the insulating cylinder into the cable end processing part,
By pulling out the insert from the insulation tube, the diameter of one end of the insulation tube is expanded, and the insulation sheath with the expanded diameter is removed by removing the cable sheath and the cable insulator for cable connection to expose the cable conductor. After inserting the cable into the cable sheath of the cable and connecting the cable conductor to the terminal treatment conductor such as a terminal, move the insulating tube with the expanded one end above the cable conductor connecting part and remove the nest. A method for assembling a cable terminal processing part, characterized in that an insulating tube is inserted and attached onto a cable conductor connecting portion by contracting an expanded diameter part of the insulating tube.