JP5469017B2 - Attaching tool for cold shrink tube and how to wear cold shrink tube - Google Patents

Description

  The present invention relates to a cold shrink tube mounting aid and a cold shrink tube mounting method.

Conventionally, an intermediate connection portion connecting power cables such as a CV cable (cross-linked polyethylene insulation vinyl sheath cable) may be covered with a normal temperature shrinkable tube, and the intermediate connection portion may be insulated and protected.
The room temperature shrinkable tube is a cylindrical body made of an elastic material such as rubber that can be expanded and contracted at room temperature. Expand the room temperature shrinkable tube, shrink the room temperature shrinkable tube with the intermediate connection part inside, and close the room temperature shrinkable tube around the intermediate connection part. Can be attached to.

Then, as shown in FIG. 9, the cold shrink tube 30 is held in an expanded state on the outer periphery of the expanded diameter holding cylinder 20 assembled by winding the string-like body 2 in a spiral shape, and the expanded diameter holding cylinder. After the intermediate connection portion 41 of the power cable 40 is disposed inside the body 20, the string-like body 2 that is unwound from the one end 21 side of the enlarged diameter holding cylinder 20 is passed through the inside of the enlarged diameter holding cylinder 20. The diameter expansion holding cylinder 20 is disassembled by pulling it out from the end 22 side, and the normal temperature shrinkable tube 30 is gradually reduced in diameter from the disassembled portion of the diameter expansion holding cylinder 20 and attached to the intermediate connection portion 41. The technology to do is known.
Here, when the room temperature shrinkable tube is a large tube used for connecting a high voltage cable, the diameter expansion holding tube that has been disassembled and shortened is opened in the opening on the other end 22 side of the diameter expansion holding tube 20. An auxiliary jig 50 is attached to prevent the cylindrical body 20 for expanding the diameter from being deformed so that the cylindrical body 20 is not crushed by the contraction force of the cold shrink tube 30 (see, for example, Patent Document 1). The string-like body 2 is drawn from the other end 22 side of the enlarged diameter holding cylinder 20 through the auxiliary jig 50 and the power cable 40.

JP 2001-37064 A

However, in the case of the above-mentioned Patent Document 1, the posture of the auxiliary jig 50 is disturbed together with the shortened diameter-enlargement holding cylinder 20, and as shown in FIG. The axis may be displaced from the power cable 40.
In the state in which the expanded diameter holding cylinder 20 and the auxiliary jig 50 are inclined with respect to the power cable 40, the string-like body 2 is sandwiched between the auxiliary jig 50 and the power cable 40, and the string-like body It may be difficult to pull out 2. Further, the string-like body 2 and the auxiliary jig 50 pulled out in such an unreasonable state rub and damage the outer surface of the power cable 40 and the inner surface of the normal temperature shrinkable tube 30, and appropriately insulate the intermediate connection portion 41. It may become impossible to protect.

  An object of the present invention is to provide a cold-shrinkable tube mounting aid and a cold-shrinkable tube mounting method that are used for mounting the cold-shrinkable tube to a connection portion of a power cable.

In order to solve the above problems, one aspect of the present invention provides:
Hold the cold shrink tube in the expanded state on the outer periphery of the expanded diameter holding cylinder formed by winding the string-like body in a spiral shape, and place the connection part of the power cable inside the expanded diameter holding cylinder Then, the string-like body unwound from one end of the expanded diameter holding cylinder is pulled out to the other end side through the inside of the expanded diameter holding cylinder, and the expanded diameter holding cylinder is sequentially disassembled from the one end side. Thus, the cold shrinkable tube is gradually reduced in diameter, and the cold shrinkable tube mounting aid used when the cold shrinkable tube is mounted on the connecting portion,
A cylindrical inner support portion that is inserted into the other end side of the expanded diameter holding cylinder and supports the other end side from the inner surface;
Covering the outer surface of the cold-shrinkable tube, aligning the axis of the inner support with the axis of the power cable, and supporting the inner support,
It is characterized by having.

With this wearing aid, the expanded diameter holding cylinder holding the expanded temperature-shrinkable tube is sequentially disassembled from one end, and the room temperature-shrinkable tube is sequentially reduced in diameter. When attaching to the connection part, the inner support part of the mounting aid supports the other end of the expanded diameter holding cylinder from the inner surface, so that the expanded expanded holding cylinder shrinks at room temperature. Since it is not crushed by the contraction force of the tube, the string-like body can be pulled out smoothly, and the expanded diameter holding cylinder can be satisfactorily disassembled.
In particular, the outer support portion of the wearing aid is aligned with the axial center of the power cable and the inner support portion extends along the power cable until disassembly of the expanded diameter holding cylinder is completed. Since it tries to maintain the state that it is supported in the existing direction, it can suppress the inner support part from being inclined, and the string-like body can be pulled out smoothly, and the expanded diameter holding cylinder can be disassembled well, and the room temperature shrinkable tube Can be satisfactorily attached to the connecting portion of the power cable.

  Moreover, it is preferable that the length which the said outer side support part extends in the direction in alignment with the said power cable is longer than the length in which the said inner side support part follows the said diameter expansion holding cylinder.

  If the outer support portion is made longer than the inner support portion, the inner support portion can be extended and supported in a more stable state in the direction in which the power cable extends.

  Moreover, it is preferable that the said outer side support part has a part which can follow the diameter reduction of a normal temperature shrinkable tube, can deform | transform, and can continue to contact | abut on the outer surface of a normal temperature shrinkable tube.

  If the outer support portion is provided with a portion that deforms following the shrinkage of the cold-shrinkable tube and continues to contact the outer surface of the cold-shrinkable tube, the inner support portion can be supported in a more stable state.

Another aspect of the present invention is as follows:
Hold the cold shrink tube in the expanded state on the outer periphery of the expanded diameter holding cylinder formed by winding the string-like body spirally,
Next, a power cable connecting portion is arranged inside the expanded diameter holding cylinder,
Next, the string-like body unwound from one end of the expanded diameter holding cylinder is pulled out to the other end side through the inside of the expanded diameter holding cylinder, and the expanded diameter holding cylinder is sequentially disassembled from the one end side. In the mounting method of the normal temperature shrinkable tube in which the cold shrinkable tube is sequentially reduced in diameter and attached to the connection portion.
Using a wearing aid (for example, a wearing aid according to claim 1) comprising an inner support portion and an outer support portion,
The inner support portion supports the inner surface on the other end side of the expanded diameter holding cylinder, and the outer support portion covering the outer surface of the cold shrink tube extends the inner support portion along the power cable. The expanded diameter holding cylinder is disassembled in a state in which it is supported in a direction to do.

According to this cold shrink tube mounting method, the expanded diameter holding cylinder holding the expanded cold shrink tube is sequentially disassembled from one end, and the cold shrink tube is sequentially reduced in diameter. When attaching the shrinkable tube to the connection part, the inner support part of the attachment assisting tool supports the other end side of the enlarged diameter holding cylinder from the inner surface. However, since it is not crushed by the shrinkage force of the normal temperature shrinkable tube, all the string-like bodies can be pulled out smoothly and the expanded diameter holding cylinder can be disassembled satisfactorily.
In particular, the outer support part that supports the inner support part tries to maintain the inner support part in a state of extending along the power cable until the diameter expansion holding cylinder is disassembled. The portion can be prevented from being inclined, the string-like body can be smoothly pulled out, the diameter-enlarged holding cylinder can be disassembled satisfactorily, and the cold-shrinkable tube can be satisfactorily attached to the connecting portion of the power cable.

According to the present invention, the expanded diameter holding cylinder holding the expanded temperature-shrinkable tube is sequentially disassembled from one end side, and the room-temperature-shrinkable tube is sequentially reduced in diameter, and the room-temperature-shrinkable tube is connected to the connecting portion. By attaching the inner support part of the mounting aid in the other end of the expanded diameter holding cylinder, and supporting the inner surface on the other end side of the expanded diameter holding cylinder by the inner support part, The expanded diameter holding cylinder that has been disassembled and shortened can be prevented from being crushed by the contraction force of the normal temperature contraction tube. And all the string-like bodies can be pulled out smoothly, and the expanded diameter holding cylinder can be disassembled satisfactorily.
In particular, the outer support portion covering the outer surface of the normal temperature shrinkable tube supports the inner support portion, and the inner support portion is extended in the direction in which the power cable extends until the diameter expansion holding cylinder is disassembled. Since it tries to stabilize and maintain the state, the string-like body can be pulled out smoothly, the diameter-enlarged holding cylinder can be disassembled satisfactorily, and the cold-shrinkable tube can be satisfactorily attached to the power cable connection.

It is explanatory drawing which shows the state which uses a mounting assistance tool, when mounting | wearing a normal temperature shrinkable tube to the intermediate connection part of an electric power cable. It is a perspective view which shows the attachment assistance tool of a normal temperature shrinkable tube. It is a perspective view which shows the state which disassembled the mounting aid. It is explanatory drawing which shows the process of mounting | wearing the normal temperature shrinkable tube to the intermediate connection part of an electric power cable. It is explanatory drawing which shows the normal temperature shrinkable tube completed mounting | wearing to the intermediate connection part. It is explanatory drawing which shows the process of mounting | wearing a normal temperature shrinkable tube to the intermediate connection part of an electric power cable using the mounting assistance tool of other embodiment. It is a perspective view which shows the modification of a mounting assistance tool. It is a perspective view which shows the modification of a mounting assistance tool. It is explanatory drawing which shows the mounting method of the conventional cold shrinkable tube. It is explanatory drawing which shows the state which became the disorder | damage | failure in the conventional mounting method, and the attitude | position of the auxiliary jig became disordered with the shortened diameter expansion holding cylinder.

  Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. However, the embodiments described below are given various technically preferable limitations for carrying out the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

(Embodiment 1)
FIG. 1 is a side view showing a partial cross-sectional view of a state in which the attachment assisting tool 10 is used when the room temperature shrinkable tube 30 is attached to the intermediate connection portion 41 to which the power cable 40 is connected.
FIG. 2 is a perspective view illustrating the cold shrink tube mounting aid 10.

  The power cable 40 is, for example, a crosslinked polyethylene insulated vinyl sheath cable (CV cable). The intermediate connection portion 41 is a portion where the cable conductors exposed by stripping the tip end portions of the power cable 40 are connected by, for example, a connection sleeve. In order to insulate and protect the intermediate connection portion 41, the cold shrink tube 30 is attached.

The room temperature shrinkable tube 30 is a cylindrical body made of an elastic material that can expand and contract at room temperature, such as silicone rubber and ethylene propylene rubber. Although not shown, the main part of the cold shrink tube 30 is an insulating layer formed of an insulating rubber such as silicone rubber or ethylene propylene rubber, and an inner electrode layer having semiconductivity on the inner surface thereof. And an external electrode layer having semiconductivity is provided on the outer surface. The internal electrode layer and the external electrode layer are, for example, electrode layers made of semiconductive rubber obtained by adding carbon to silicone rubber or ethylene propylene rubber, and integrally formed in the normal temperature shrinkable tube 30.
The inside diameter of the cold shrink tube 30 is smaller than the outside diameter of the power cable 40 (intermediate connection portion 41). Due to the difference in diameter between the inner diameter of the cold shrink tube 30 and the outer diameter of the power cable 40, the inner circumferential surface of the cold shrink tube 30 can be attached in close contact with the outer circumferential surface of the power cable 40.

The expanded diameter holding cylinder 20 is formed by, for example, winding a plastic string-like body 2 in a spiral shape so as to partially overlap each other, and fusing or fitting the overlapped portions. It is a cylindrical core material.
The expanded diameter holding cylinder 20 can unravel the string-like body 2 along the spiral fused surface. And, for example, by pulling the string-like body 2 unwound from the one end 21 of the enlarged diameter holding cylinder 20 through the inside of the enlarged diameter holding cylinder 20 to the other end 22 side, the enlarged diameter holding cylinder 20 is It can be disassembled sequentially from the one end 21 side.
The inner diameter of the expanded diameter holding cylinder 20 is larger than the outer diameter of the power cable 40. The power cable 40 can be inserted into the inside of the expanded diameter holding cylinder 20, and the intermediate connection portion 41 of the power cable 40 can be disposed in the expanded diameter holding cylinder 20.
Further, the expanded diameter holding cylinder 20 holds a normal temperature shrinkable tube 30 whose diameter is increased to the outer diameter of the expanded diameter holding cylinder 20 on the outer periphery thereof.

As shown in FIGS. 1 and 2, the mounting aid 10 includes a flat plate-like base portion 11 having a substantially circular opening 11 a at a substantially center, and a cylindrical inner side erected vertically from an edge of the opening 11 a of the base portion 11. A support portion 12 and a cylindrical outer support portion 13 erected vertically from the vicinity of the outer edge of the base portion 11 are provided.
The inner support portion 12 and the outer support portion 13 extend from the base portion 11 in the same direction, and the inner support portion 12 and the outer support portion 13 are oriented in parallel to each other. Further, the outer support portion 13 extends longer than the inner support portion 12.

The inner support portion 12 can be inserted inside the expanded diameter holding cylinder 20 and is in contact with the inner surface of the expanded diameter holding cylinder 20 to support the expanded diameter holding cylinder 20 from the inside.
The inner support 12 has an inner diameter that is larger than the outer diameter of the power cable 40, and a gap through which the string-like body 2 can pass is provided between the inner support 12 and the power cable 40. It can be done.

The outer support portion 13 covers the outer surface of the room temperature shrinkable tube 30 held on the outer periphery of the diameter expansion holding cylinder 20 with almost no gap, and the diameter expansion holding cylinder 20 and the room temperature shrinkable tube 30 extend. The direction of the power cable 40 is approximately parallel to the direction in which the power cable 40 extends. In addition, the outer side support part 13 has the length (namely, about half the length of the normal temperature shrinkable tube 30) which reaches the approximate center from the edge part of the normal temperature shrinkable tube 30.
And the outer side support part 13 supports the inner side support part 12 in the direction extended along the power cable 40. As shown in FIG. Specifically, the outer support portion 13 aligns the axis of the inner support portion 12 with the axis of the power cable 40, and supports the inner support portion 12 in the direction in which the power cable 40 extends.

As shown in FIGS. 2 and 3, the mounting aid 10 is formed by combining two semi-cylindrical members 5 having a substantially semi-cylindrical shape. Since this mounting aid 10 can be disassembled into two parts, when attaching the mounting aid 10 to the diameter expansion holding cylinder 20 and the room temperature shrinkable tube 30 or when removing it from the power cable 40, it works well. It will help you.
The mounting aid 10 is made of a material having an appropriate rigidity, such as a metal material such as copper, aluminum, or iron, or a plastic material including FRP (Fiber Reinforced Plastic).

  Next, a method for mounting the cold-shrinkable tube, in which the cold-shrinkable tube 30 is mounted on the intermediate connection portion 41 of the power cable 40 using the mounting aid 10 will be described.

First, the expanded normal temperature shrinkable tube 30 is held on the outer periphery of the expanded diameter holding cylinder 20, and the cold expanded tube unit 31 composed of the expanded diameter holding cylinder 20 and the cold contracted tube 30 is manufactured.
Next, the inner support portion 12 of the attachment assisting tool 10 is inserted into the other end 22 side of the expanded diameter holding cylinder 20, and the outer support portion 13 of the attachment assisting tool 10 is extended along the outer surface of the room temperature shrinkable tube 30. The attachment aid 10 is attached to the room temperature shrinkable tube unit 31.

After attaching the mounting aid 10 to the room temperature shrinkable tube unit 31, one power cable 40 to be connected is inserted into the enlarged diameter holding cylinder 20 and the mounting aid 10. Next, after the power cables 40 are connected to each other, a semiconductive tape winding process or the like is performed as necessary. Next, the cold-shrinkable tube unit 31 is pulled back on the intermediate connection portion 41 thus processed.
If the string-like body 2 at one end 21 of the expanded diameter holding cylinder 20 is taped to the power cable 40, the string-like body 2 is pulled when the room temperature shrinkable tube unit 31 is pulled back to the intermediate connection portion 41 of the power cable 40. Can be passed through the inner support portion 12 of the wearing aid 10 and the string-like body 2 can be pulled out from the other end 22 side of the enlarged diameter holding cylinder 20 as shown in FIG.

Then, in a state where the intermediate connection portion 41 is disposed at a position corresponding to the approximate center of the cold shrink tube 30, the string-like body 2 is pulled out from the other end 22 side of the enlarged diameter holding cylinder 20, and the enlarged diameter holding cylinder is pulled out. The body 20 is disassembled sequentially from the one end 21 side. When the expanded diameter holding cylinder 20 is disassembled from the one end 21 side, as shown in FIG. 4, the normal temperature shrinkable tube 30 is sequentially reduced in diameter from the portion where the expanded diameter holding cylinder 20 is removed, and the intermediate connection of the power cable 40 is performed. Mounted on the part 41.
Since the cold-shrinkable tube 30 is thick, even if the inner peripheral surface side is reduced in diameter, the shape of the outer peripheral surface side is hardly changed, and the outer diameter of the cold-shrinkable tube 30 is hardly changed. The outer support portion 10 of the ten is kept substantially in contact with the outer peripheral surface of the cold shrink tube 30.

Here, as shown in FIG. 4, the inner support portion 12 of the mounting aid 10 supports the other end 22 side of the expanded diameter holding cylinder 20 from the inner surface. The holding cylinder 20 is prevented from being crushed by the shrinkage force of the cold shrink tube 30.
In particular, the arrangement and orientation of the inner support portion 12 are supported by the outer support portion 13 that contacts the outer surface of the cold shrink tube 30. And since the outer side support part 13 aligns the axial center of the inner side support part 12 with the axial center of the power cable 40, and extends the inner side support part 12 in the direction in which the power cable 40 extends, it is supported. As in the prior art, it is possible to prevent the inner support portion 12 (the mounting aid 10) from being shifted obliquely with respect to the power cable 40 together with the shortened diameter-enlargement holding cylinder 20.
Therefore, the string-like body 2 can be smoothly pulled out, the diameter expansion holding cylinder 20 is disassembled without damaging the power cable 40 and the room temperature shrinkable tube 30, and the room temperature shrinkable tube 30 is connected to the intermediate connection portion 41 ( It can be brought into close contact with the power cable 40).
When the string-like body 2 is pulled out to the end portion of the inner support portion 12 of the wearing aid 10 and the expanded diameter holding cylinder 20 is disassembled and removed, the inner support portion 12 of the wearing aid 10 becomes a room temperature shrinkable tube. Extruded with 30 contraction force.

  And after pulling out all the string-like bodies 2 and disassembling and removing the expanded diameter holding cylinder 20, by removing the mounting aid 10 from the power cable 40, as shown in FIG. The operation of attaching the cold shrink tube 30 to 41 is completed.

As described above, according to the present embodiment, the inner support portion 12 of the mounting aid 10 having appropriate rigidity supports the other end 22 side of the expanded diameter holding cylinder 20 from the inner surface, so that it is disassembled and shortened. The expanded diameter holding cylinder 20 is not crushed and damaged by the contraction force of the normal temperature shrinkable tube 30, and all the string-like bodies 2 are pulled out smoothly to make the expanded diameter holding cylinder 20 better. Can be dismantled.
In particular, the inner support portion 12 supported by the outer support portion 13 is in a state in which the axis center of the inner support portion 12 is aligned with the axis center of the power cable 40 until the diameter expansion holding cylinder 20 is disassembled. Since the diameter extension holding cylinder 20 can be supported while maintaining the posture along the direction in which the power cable 40 and the normal temperature shrinkable tube 30 extend, the string-like body 2 can be pulled out smoothly to increase the diameter holding cylinder. The body 20 can be disassembled satisfactorily, and the cold shrink tube 30 can be attached to the intermediate connection portion 41 of the power cable 40 satisfactorily.
And since the intermediate connection part 41 can be coat | covered with the normal temperature shrinkable tube 30 in the state in which the power cable 40 and the normal temperature shrinkable tube 30 are not damaged, the intermediate connection part 41 is reinforced with the normal temperature shrinkable tube 30 and is insulated. can do.

(Embodiment 2)
FIG. 6 is an explanatory view showing a process of attaching the cold shrink tube 30 to the intermediate connection portion of the power cable using the attachment assisting tool 10C having a structure different from that of the first embodiment. Are given the same reference numerals to simplify the description.
The mounting aid 10C used in this embodiment is different from that of the first embodiment in the inner support portion 12A.
The inner support portion 12A of the mounting aid 10C has a cylindrical shape that covers the outside of the expanded diameter holding cylinder 20 without loosening, and is in close contact with the outer surface of the expanded diameter holding cylinder 20 on the other end side. The diameter holding cylinder 20 is supported from the outside so as not to tilt.
In this embodiment, the inner support portion 12A of the mounting aid 10C supports the other end 22 side of the expanded diameter holding cylinder 20 from the outer side until the expanded diameter holding cylinder 20 is disassembled. In order not to incline the cylindrical body 20, it is possible to keep the posture along the direction in which the power cable 40 and the normal temperature shrinkable tube 30 extend. As a result, the string-like body 2 can be pulled out smoothly, the diameter-maintaining cylindrical body 20 can be smoothly disassembled, and the room temperature shrinkable tube 30 can be satisfactorily attached to the intermediate connection portion 41 of the power cable 40.
Moreover, when attaching the normal temperature shrinkable tube 30, the accident which damages the electric power cable 40 and the normal temperature shrinkable tube 30 can be prevented.
In addition, in this embodiment, since the inner support portion 12A of the mounting aid 10C fits outside the expanded diameter holding cylinder 20, the space inside the expanded diameter holding cylinder 20 is not narrowed, that is, Since the space for pulling out the string-like body 2 does not narrow, there is an advantage that the string-like body 2 can be easily pulled out. Moreover, there is also an advantage that it is possible to dismantle all of the expanded diameter holding cylinder 20 in the same manner as when the mounting aid 10C is not used.

The present invention is not limited to the above embodiment.
For example, as shown in FIG. 7, the outer support portion 13 of the mounting aid 10 </ b> A is formed of a resin material having moderate rigidity and deformable, and a rubber band-like shrinkage biasing member on the outer surface of the outer support portion 13. 14 may be used. In this example, the contraction biasing member 14 is attached to the distal end portion of the outer support portion 13.
The contraction urging member 14 tightens the end portion side of the outer support portion 13 of the mounting aid 10 </ b> A to urge the outer support portion 13 to the normal temperature shrinkable tube 30, and the outer support portion 13 to the outer peripheral surface of the normal temperature shrinkable tube 30. It keeps contacting with.
And when attaching the normal temperature shrinkable tube 30 to the intermediate | middle connection part 41 (electric power cable 40), when the outer peripheral diameter of the normal temperature shrinkable tube 30 is diameter-reduced along with the inner peripheral surface side of the normal temperature shrinkable tube 30 being reduced in diameter. The outer support portion 13 of the mounting aid 10A is deformed following the reduced diameter of the cold shrink tube 30. That is, the distal end side of the outer support portion 13 of the mounting aid 10A can maintain a state in contact with the outer peripheral surface of the normal temperature shrinkable tube 30 whose diameter is reduced. It can be easily maintained in a posture extending in the direction along the power cable 40 and can be supported in a more stable state.
As a result, the cold shrinkable tube 30 can be favorably attached to the intermediate connection portion 41 of the power cable 40 also by the cold shrinkable tube attachment method using the attachment assisting tool 10A.
In addition, you may provide the outer support part 13 with the slit along the length direction of a cable.

Further, as shown in FIG. 8, a plurality of leaf spring-like outer support portions 15 (three in the drawing) may be provided on the base portion 11 of the mounting aid 10 </ b> B.
The outer support portion 15 is erected from the outer edge of the base portion 11, and its tip end side is inclined toward the axial center of the inner support portion 12, and the tip end portion is narrowed so as to be close to each other. The outer support portion 15 can be bent by being elastically deformed in a radial direction in which the tips are separated from each other, and is restored to a state in which the tips are brought close to each other and narrowed.
When attaching the mounting aid 10B to the cold-shrinkable tube unit 31, the leaf spring-shaped outer support 15 is pushed and bent by the cold-shrinkable tube 30, and the outer support 15 attaches the outer peripheral surface of the cold-shrinkable tube 30. It comes into contact with force. As shown by a two-dot chain line in FIG. 8, the contraction biasing member 14 may be attached to the outer support portion 15 as necessary.
And when attaching the normal temperature shrinkable tube 30 to the intermediate | middle connection part 41 (electric power cable 40), when the outer peripheral diameter of the normal temperature shrinkable tube 30 is diameter-reduced along with the inner peripheral surface side of the normal temperature shrinkable tube 30 being reduced in diameter. The outer support portion 15 of the wearing aid 10B is elastically deformed following the reduced diameter of the cold shrink tube 30. That is, the distal end side of the outer support portion 15 of the wearing aid 10B can maintain a state in contact with the outer peripheral surface of the normal temperature shrinkable tube 30 that is reduced in diameter. It can be easily maintained in a posture extending in the direction along the power cable 40 and can be supported in a more stable state.
As a result, the room temperature shrinkable tube 30 can be favorably attached to the intermediate connection portion 41 of the power cable 40 also by the room temperature shrinkable tube attachment method using the attachment aid 10B.

  In the above embodiment, the method of attaching the cold shrink tube 30 to the intermediate connection portion 41 of the power cable 40 has been described. However, the present invention is not limited to this, and the power cable and the conductor pull-out rod ( The present invention may be applied when the cold-shrinkable tube 30 is attached to a cable connection portion at any other location such as a terminal connection portion to which a rod-shaped metal conductor is connected.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

10, 10 </ b> A, 10 </ b> B, 10 </ b> C Mounting aid 11 Base 12 Inner support 13 Outer support 14 Shrinkage biasing member 15 Outer support 2 Stringed body 20 Expanded diameter holding cylinder 21 One end 22 Other end 30 Cold shrink tube 31 Room temperature shrinkable tube unit 40 Power cable 41 Intermediate connection (connection)

Claims (4)

Hold the cold shrink tube in the expanded state on the outer periphery of the expanded diameter holding cylinder formed by winding the string-like body in a spiral shape, and place the connection part of the power cable inside the expanded diameter holding cylinder Then, the string-like body unwound from one end of the expanded diameter holding cylinder is pulled out to the other end side through the inside of the expanded diameter holding cylinder, and the expanded diameter holding cylinder is sequentially disassembled from the one end side. Thus, the cold shrinkable tube is gradually reduced in diameter, and the cold shrinkable tube mounting aid used when the cold shrinkable tube is mounted on the connecting portion,
A cylindrical inner support portion that is attached to the other end side of the expanded diameter holding cylinder and supports the other end side;
Covering the outer surface of the cold-shrinkable tube, aligning the axis of the inner support with the axis of the power cable, and supporting the inner support,
A cold-shrinkable tube wearing aid characterized by comprising:   2. The room temperature shrinkage according to claim 1, wherein a length of the outer support portion extending in a direction along the power cable is longer than a length of the inner support portion extending along the expanded diameter holding cylinder. Tube mounting aid.   The said outer side support part has a part which can deform | transform following the diameter reduction of a normal temperature shrinkable tube, and can continue to contact | abut on the outer surface of a normal temperature shrinkable tube. Attaching aid for cold shrink tube. Hold the cold shrink tube in the expanded state on the outer periphery of the expanded diameter holding cylinder formed by winding the string-like body spirally,
Next, a power cable connecting portion is arranged inside the expanded diameter holding cylinder,
Next, the string-like body unwound from one end of the expanded diameter holding cylinder is pulled out to the other end side through the inside of the expanded diameter holding cylinder, and the expanded diameter holding cylinder is sequentially disassembled from the one end side. In the mounting method of the normal temperature shrinkable tube in which the cold shrinkable tube is sequentially reduced in diameter and attached to the connection portion.
Using the wearing aid of claim 1,
While supporting the other end side of the expanded diameter holding cylinder with the inner support portion of the wearing aid, the outer support portion of the wearing aid covering the outer surface of the cold-shrinkable tube provides the inner support portion with the electric power. A mounting method for a normal temperature shrinkable tube, comprising disassembling the expanded diameter holding cylinder while being supported in a direction extending along a cable.

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