JP2008193835A - Cold shrink tubing unit packing body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold shrink tubing unit packing body that enables reduction in the level of caution that is demanded during power cable connecting work. <P>SOLUTION: The cold shrink tubing unit packing body is obtained by packing a cold shrinkable tubing unit 50 using a packing material 60. The cold shrink tubing unit is comprised of: a tube 52 reduced in diameter at normal temperature; and a cylindrical diameter expanding member 54, that is disposed inside the tube and holds the tube in an diameter-expanded state. The packing material 60 includes a circumference protective body 62 that covers the outer circumferential surface of the tube; and a cylindrical protecting body 64 that is passed through the diameter-expanding member and both ends of which are folded back and covered on the outer circumferential side of the circumference protective body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cold-shrinkable tube unit package in which cold-shrinkable tube units used for connecting power cables are packed with a packing material.

  Conventionally, a room temperature shrinkable tube unit has been used to insulate a connecting portion of a power cable such as a high voltage CV cable. An example of the room temperature shrinkable tube unit is shown in the schematic cross-sectional view of FIG. The cold-shrinkable tube unit in FIG. 7 includes a tube 10 and a diameter expanding member 12.

  The tube 10 is insulated from the insulating layer 14, the semiconductive stress cone layers 16 and 16 provided on both sides of the inner periphery thereof, and the internal semiconductive layer 18 provided in the central portion of the inner periphery of the insulating layer 14. It is substantially cylindrical having an outer semiconductive layer 20 provided on the outer peripheral surface of the layer 14, and is formed of a rubber material having elasticity at room temperature such as ethylene propylene rubber or silicone rubber. The diameter can be reduced (for example, see Patent Document 1). The diameter-expanding member 12 is a spiral core in which a wire is wound in a spiral shape, and is disposed on the inner peripheral side of the tube 10. The inner diameter of the tube 10 is held in an expanded state by the diameter-expanding member 12.

  When using the above-mentioned normal temperature shrinkable tube unit to connect the power cable, dust or foreign matter may be attached or scratched to prevent deterioration of the electrical characteristics at the power cable connection point. Need to prevent. Therefore, the room temperature shrinkable tube unit is shipped in a state of being packed with a packing material in order to prevent external dust and foreign matter from being attached or damaged.

  Conventionally, the thing of patent document 2 is proposed as a packing material of the normal temperature shrinkable tube unit mentioned above. The packaging material of Patent Document 2 includes a first protective material 22 for covering the entire inner peripheral surface of the diameter-expanding member 12 (a holding sleeve in Patent Document 2), and a room temperature shrinkable tube, as shown by a one-dot chain line in FIG. A bag-like second protective material 24 for covering the entire periphery of the unit and a third protective material 26 for covering the outer peripheral surface of the tube 10 are provided. The first to third protective materials are made of a film material such as polyethylene.

  The cold-shrinkable tube unit package of Patent Document 2 is shipped in the state shown in FIG. At the construction site, the normal temperature shrinkable tube unit is taken out from the second protective member 24, and the first protective member 22 and the third protective member 26 are attached. Insert the tube unit over one of the power cables. Next, one power cable and the other power cable are connected. Thereafter, only the cold-shrinkable tube unit is moved and, as shown in FIG. 8, the inner semiconductive layer 18 of the tube 10 is positioned around the connection location of both the power cables 30 and 30, and then the diameter-expanding member is removed from the tube 10. By pulling out 12, the tube 10 is reduced in diameter and brought into close contact with the connection location of both power cables 30, 30. In FIG. 8, 32 is a conductor, and 34 is a conductor connecting tube.

JP 2005-12933 A JP 2003-299240 A

  However, in the cold-shrinkable tube unit package of Patent Document 2 shown in FIG. 7, both end portions of the first protective material 22 are on both end outer peripheral surfaces of the diameter expanding member 12 (or both end outer peripheral surfaces of the tube 10). Since it is attached with an adhesive tape (see Patent Document 2, 0018, FIG. 1), there is a problem that extra care is required for packaging and construction.

  That is, when both end portions of the first protective member 22 are attached to the outer peripheral surfaces of both end portions of the diameter expanding member 12 with an adhesive tape, the ends of the diameter expanding member 12 formed of a spiral core in which a wire is wound spirally. Since it is easy to break the part, it is necessary to be careful not to break here. The collapse of the end of the diameter-expanding member 12 may cause the whole to collapse.

  Further, at the construction site, after removing the second protective material 24, the end of the tube 10 is not protected by the protective material and is exposed when the cold shrinkable tube unit is externally fitted to the power cable. ing. Therefore, extra attention is required to prevent the end of the tube 10 from being damaged by a tool or the like during the connection work of the power cable.

  Furthermore, when both ends of the first protective material 22 are attached to the outer peripheral surfaces of the both ends of the tube 10 with an adhesive tape, the end of the third protective material 26 wound thereon is likely to float and peel off. Care must be taken so that the third protective material 26 is not peeled outside and obstructs the work.

  The present invention has been made in view of the above-described circumstances, and is a room temperature shrinkable tube unit package formed by packing a room temperature shrinkable tube unit with a packing material, and is a room temperature shrinkable tube unit packing operation and a power cable connecting operation. An object of the present invention is to provide a cold-shrinkable tube unit package that can alleviate the level of attention required during the period.

In order to achieve the above object, the present application provides the following inventions.
(1) Packing a normal temperature shrinkable tube unit, which is composed of a tube having a reduced diameter at normal temperature, and a cylindrical diameter-expanding member disposed on the inner peripheral side of the tube and holding the tube in an expanded state, with a packing material. A normal-temperature-shrinkable tube unit packing body, wherein the packing material is passed through an outer peripheral protector that covers the outer peripheral surface of the tube and the diameter-expanding member, and both end portions are folded back and the outer periphery of the outer peripheral protective member A room-temperature-shrinkable tube unit package having a cylindrical protective body placed on the side.
(2) It is characterized in that both ends of the cylindrical protector are fastened to the room temperature shrinkable tube unit by winding an adhesive tape around both ends of the cylindrical protector so as to be tightened from the outer peripheral side. (1) Room temperature shrinkable tube unit package.
(3) The other end of the cylindrical protector is overlaid on the outside of one end of the cylindrical protector, and each end is wound at a position close to the respective end edge. The package of the room temperature shrinkable tube unit according to (2), which is fixed to the room temperature shrinkable tube unit with an adhesive tape.
(4) The tube has an insulating layer formed of an insulating rubber material, and an external semiconductive layer formed by a coating method on the outer periphery of the insulating layer. ) Room temperature shrinkable tube unit package.
(5) The room temperature shrinkable tube unit package according to (4), wherein the insulating layer and the external semiconductive layer are each made of silicone rubber.
(6) The room temperature shrinkable tube unit package according to (1) to (5), wherein the outer periphery protector is formed of a plurality of layers of sheets.
(7) The normal temperature shrinkable tube unit package according to any one of (1) to (6), wherein both end portions in the axial direction of the tube are tapered surfaces having a diameter reduced toward the tip.

  According to the invention of (1), the level of caution required for packing work and power cable connection work can be relaxed. In the invention of (1), since both end portions of the cylindrical protective body for protecting the diameter-enlarging member are folded and covered on the outer peripheral side of the outer peripheral protective body, the outer peripheral protective body is a cylindrical protective body. It is covered and the whole fits well, and there is no need to stop the cylindrical protector on the diameter expanding member. Furthermore, according to the invention of (1), (b) the cause of trouble that the diameter-expanding member made of the spiral core collapses is reduced, (b) the tube end portion can be more reliably protected at the construction site, and (c) the plan. The effect that peeling of an outer packaging material can be prevented is exhibited.

  In the invention of (2), since the adhesive tape is wound around both ends of the cylindrical protector from the outer peripheral side, both ends of the cylindrical protector can be stopped well on the room temperature shrinkable tube unit even from the outer peripheral protector. Can be worn.

  In the invention of (3), the other end is overlapped on the outside of one end of the cylindrical protective body, and each end is fastened with an adhesive tape wound at a position close to each end edge. Even if the tubular protective body is pulled in the axial direction of the tube unit, it is possible to prevent the tubular protective body from coming off due to the engagement between the wound adhesive tapes. For this reason, it is not necessary to strongly wrap the adhesive tape around the tube unit.

  The invention of (4) is a tube package having an insulating layer formed of an insulating rubber material and an outer semiconductive layer formed by a coating method on the outer periphery of the insulating layer. The outer semiconductive layer formed by the coating method is thinner and weaker than the molded outer semiconductive layer, and therefore it is necessary to handle it with more care so as not to damage it. Since the outer peripheral protective body is interposed between the outer semiconductive layer and the cylindrical protective body in this package, even if the outer peripheral protective body is pulled in the axial direction of the tube, the force is applied to the outer semiconductive layer. Since it is difficult to be transmitted, and even if it is transmitted, it is dispersed, so that it is possible to reduce accidents in which the external semiconductive layer is damaged during transportation. This effect is particularly effective when the external semiconductive layer and the insulating layer are made of soft silicone rubber (the invention of (5)).

  In the invention of (6), since the outer peripheral protector is formed of a plurality of sheets, when the outer peripheral protector is pulled in the axial direction of the tube, the force is transmitted to the external semiconductive layer. Can be prevented.

  In the invention of (7), both end portions in the axial direction of the tube are tapered surfaces whose diameter is reduced toward the tip. By folding the cylindrical protective body on the outer peripheral protective body, even if the tube end portion is a tapered surface, the packaging body of the present invention can alleviate the required level of caution during packaging and connection.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following examples. FIG. 1 is a cross-sectional view showing an embodiment of a cold-shrinkable tube unit package according to the present invention.

  In FIG. 1, 50 shows a cold shrinkable tube unit. The room temperature shrinkable tube unit 50 includes a tube 52 that is reduced in diameter at room temperature, and a cylindrical diameter expanding member 54 that is disposed on the inner peripheral side of the tube 52 and holds the tube 52 in an expanded state. The tube 52 has basically the same structure as the tube 10 shown in FIG. 7, and includes an insulating layer 14, a semiconductive stress cone layer 16, an internal semiconductive layer 18, and an external semiconductive layer 20. Each of these layers is formed using silicone rubber as a main raw material, which hardly causes permanent elongation.

  In the tube 52 of this example, the outer semiconductive layer 20 is formed by a coating method. Such an external semiconductive layer is formed, for example, by coating a liquid semiconductive rubber material mainly composed of silicone rubber on the outer periphery of the insulating layer by spraying or the like by nozzle injection, and vulcanizing and curing it. can do. Further, in this example, both end portions in the axial direction of the tube 52 are tapered surfaces 56 and 56 that are reduced in diameter toward the tip. The diameter-expanding member 54 is a spiral core obtained by winding a wire in a spiral shape.

  In FIG. 1, reference numeral 60 denotes a packing material for packing the cold-shrinkable tube unit 50. The packing material 60 is a cylindrical protective body that is passed through an outer peripheral protective body 62 that covers the outer peripheral surface of the tube 52 and a diameter-expanding member 54, and both end portions are folded and covered on the outer peripheral side of the outer peripheral protective body 62. 64 and a bag sheet 66 that encloses and protects the whole cold shrink tube unit 50. The outer periphery protection body 62, the cylindrical protection body 64, and the bag sheet 66 are all formed of a plastic film (sheet) made of polyethylene or the like. A film (sheet) having a thickness of about 0.05 to 1.0 mm can be used.

  The outer periphery protector 62 may be a sheet wound around a single layer, but in this example, the outer periphery protector 62 winds a long sheet around the outer peripheral surface of the tube 52 or a plurality of sheets around the outer peripheral surface of the tube 52. The outer periphery protection body 62 is formed of a sheet having a plurality of layers (about 2 to 4 layers) by being wound. You may stop the edge part of the sheet | seat used as the outer periphery protection body 62 with an adhesive tape as needed.

  Moreover, the edge part of the cylindrical protection body 64 covered on the outer peripheral side of the outer periphery protection body 62 can be stopped to the outer periphery protection body 62 or the cylindrical protection body 64 by locking means such as an adhesive tape. In this example, one end portion of the cylindrical protective body 64 is overlapped with the outer periphery of the outer peripheral protective body 62, and an adhesive tape 68 made of vinyl chloride or the like is wound so as to be tightened from the outer peripheral side. It is fixed to. The other end of the cylindrical protective body 64 is overlapped with the one end of the cylindrical protective body 64 and the outer periphery of the adhesive tape 68, and the adhesive tape 70 is wound so as to be tightened from the outer peripheral side, whereby a normal temperature shrinkable tube is obtained. It is fixed to the unit 50.

  In this case, both the adhesive tape 68 and the adhesive tape 70 are wound at positions close to each other. Further, the adhesive tapes 68 and 70 are wound at positions closer to the respective end edges of both end portions where the cylindrical protective body 64 is overlapped. That is, the adhesive tape 68 that stops one end is wound around a position closer to the edge A, and the adhesive tape 70 that stops the other end is wound closer to the edge B. When the adhesive tape 70 is wound at such a position, even if the tubular protective body 64 is pulled in the axial direction of the tube unit 50, the tubular protective body 64 is overlapped by the engagement between the wound adhesive tapes 68 and 70. Since it is possible to prevent the combined ends from coming off, it is possible to weaken the fastening of the adhesive tapes 68 and 70 to the tube unit 50.

The cold-shrinkable tube unit package of this example can be produced by the following procedure (see FIGS. 1 to 5).
(1) The outer periphery protective body 62 is wound around the outer peripheral surface of the tube 52 (FIG. 2).
(2) The cylindrical protector 64 is passed through the diameter expanding member 54 (FIG. 3).
(3) One end of the cylindrical protector 64 is folded back and overlapped with the outer periphery of the outer peripheral protector 62, and the adhesive tape 68 is wound around one end of the cylindrical protector 64 so as to be tightened from the outer peripheral side. Then, one end of the cylindrical protective body 64 is fastened to the room temperature shrinkable tube unit 50 (FIG. 4).
(4) The other end of the cylindrical protective body 64 is folded back and overlapped with one end of the cylindrical protective body 64 and the outer periphery of the adhesive tape 68, and the adhesive tape 70 is attached to the other end of the cylindrical protective body 64. Is wound so as to be tightened from the outer peripheral side, and the other end of the cylindrical protective body 64 is fixed to the room temperature shrinkable tube unit 50 (FIG. 5).
(5) The cold shrinkable tube unit 50 is sealed in the bag sheet 66 (FIG. 1).

The procedure for connecting the ends of the power cables using the cold-shrinkable tube unit package of this example is as follows.
(1) The normal temperature shrinkable tube unit 50 is taken out from the bag sheet 66.
(2) With the outer periphery protector 62 and the cylindrical protector 64 attached, one power cable is inserted into the diameter expanding member 54.
(3) Connect one power cable and the other power cable.
(4) The adhesive tapes 68 and 70 are peeled off to widen the cylindrical protective body 64.
(5) One end of the cylindrical protector 64 is stopped on one power cable.
(6) With the cylindrical protector 64 left on one power cable, only the room temperature shrinkable tube unit 50 is moved, and the internal semiconductive layer of the tube 52 is positioned around the connection location of both power cables.
(7) Pull out the enlarged member 54 from the tube 52. As a result, the diameter of the tube 52 is reduced, and the tube 52 is brought into close contact with the connection portion of both power cables (see FIG. 8).
(8) Remove the outer peripheral protector 62 as necessary.

  The cold-shrinkable tube unit package of this example has the following effects.

  (A) In a state where the cold-shrinkable tube unit 50 is externally fitted to one power cable, the end portion of the tube 52 is protected by a tubular protective body 64 that is folded back. Therefore, it is not necessary to take high care so that tools or the like do not hit the end of the tube 52 during the power cable connection work, and the level of caution required during the power cable connection work is reduced. Can do. Further, even in the case of the tube 52 having a tapered surface as in this example, the end portion of the tube 52 can be reliably protected by the folded cylindrical protector 64, and the power cable can be connected during the connection work. The required level of attention can be relaxed. Moreover, since it is not necessary to touch the diameter-expansion member 54 for packing or unpacking, the trouble which collapses the diameter-expansion member 54 can be reduced. Furthermore, since the outer periphery protection body 62 is housed in the cylindrical protection body 64, the outer periphery protection body 62 is not peeled off unexpectedly, and the handleability of the package is improved.

  (B) The external semiconductive layer formed by the molding method is thick and high in strength, whereas the external semiconductive layer 20 formed by the coating method is thin and low in strength. In the package of the normal temperature shrinkable tube unit 50 using the tube 52 having the external semiconductive layer 20 by the coating method as in this example, the cylindrical protective body 64 is folded back and directly superimposed on the outer peripheral surface of the tube 52 to form a cylindrical shape. When the adhesive tape is wound around the end portion of the protective body 64 from the outer peripheral side, if a force is applied to the cylindrical protective body 64 to shift the cylindrical protective body 64 horizontally or vertically, the tube 52 is wound around the portion where the adhesive tape is wound. A force that pulls the external semiconductive layer 20 horizontally or vertically is applied to the external semiconductive layer 20, which may cause cracks in the external semiconductive layer 20. Therefore, care must be taken in carrying the cold shrink tube unit package. On the other hand, in the room temperature shrinkable tube unit package of the present example, the outer periphery protector 62 is provided, and the outer periphery protector 62 is covered with the cylindrical protector 64. However, the outer peripheral protective body 62 can avoid direct application to the external semiconductive layer 20, and the applied force is widely dispersed and the force applied to the external semiconductive layer 20 is relaxed. Therefore, according to the cold-shrinkable tube unit package of this example, even when the outer semiconductive layer 20 is thin and low in strength formed by coating with a silicone resin, it is required to transport the cold-shrinkable tube unit package. Can reduce the attention level. In addition, in paragraph 0018 of Patent Document 2 described above, there is a description that both ends of the first protective material are attached to the outer peripheral surfaces of both ends of the tube with an adhesive tape. Problems arise.

  (C) Since the outer peripheral protector 62 is formed of a plurality of layers of sheets, even if a force for shifting the cylindrical protector 64 placed on the outer peripheral protector 62 is applied, the outer peripheral protector 62 is not spaced between the multiple layers of sheets. By deviating, it can be avoided that force is transmitted to the external semiconductive layer, and thus the external semiconductive layer can be prevented from being damaged.

  (D) One end of the cylindrical protector 64 is superimposed on the outer periphery of the outer peripheral protector 62, and the other end of the cylindrical protector 64 is overlapped with the outer periphery of the one end of the cylindrical protector 64. In addition, since the two adhesive tapes 68 and 70 are close to each other, the cylindrical protective body 64 is firmly fixed to the cold shrinkable tube unit 50, so that the cold shrinkable tube unit 50 can be reliably protected. .

  In the present invention, the structure and material of the tube and the diameter-enlarging member, the material of the outer periphery protector and the cylindrical protector, etc. are not limited to the above embodiment, and can be changed as appropriate. For example, as shown in FIG. 6, the outer peripheral protector may be formed by folding a surplus portion 80 in the radial direction of the tube using a large cylindrical member that leaves a margin even when the tube is inserted. Good. Moreover, in the said embodiment, although the edge part of the cylindrical protective body was fixed to the normal temperature shrinkable tube unit with the narrow adhesive tape, the wide adhesive tape is covered with the outer periphery protective body of the cylindrical protective body. It may be wrapped around the entire part, and the end of the cylindrical protector may be fastened to the cold-shrinkable tube unit using an adhesive, and the means for fastening the tubular protective body to the cold-shrinkable tube unit is limited. Absent.

It is sectional drawing which shows one Embodiment of the normal temperature shrinkable tube unit package which concerns on this invention. It is sectional drawing which shows the state which wound the outer periphery protective body around the outer peripheral surface of the tube. It is sectional drawing which shows the state which let the cylindrical protective body pass in the diameter-expansion member. It is sectional drawing which shows the state which turned up the one edge part of the cylindrical protective body, and covered the outer peripheral side of the outer periphery protective body. It is sectional drawing which shows the state which turned up the other edge part of a cylindrical protective body, and covered the outer peripheral side of the outer periphery protective body. It is a typical sectional view showing an example of a perimeter protector. It is typical sectional drawing which shows an example of a normal temperature shrinkable tube unit package. It is typical sectional drawing which shows the state which connected the power cable with the normal temperature shrinkable tube.

Explanation of symbols

14 Insulating layer 20 External semiconductive layer 50 Room temperature shrinkable tube unit 52 Tube 54 Diameter expanding member 56 Tapered surface 60 Packing material 62 Peripheral protector 64 Cylindrical protector 66 Bag sheet 68 Adhesive tape 70 Adhesive tape

Claims (7)

  Room-temperature shrinkage formed by packing a room-temperature shrinkable tube unit, which is composed of a tube that shrinks at normal temperature and a cylindrical diameter-expanding member that is disposed on the inner peripheral side of the tube and holds the tube in an expanded state, with a packing material A tube unit packaging body, wherein the packaging material is passed through an outer peripheral protection body covering the outer peripheral surface of the tube and the diameter-expanding member, and both end portions are folded back to cover the outer peripheral side of the outer peripheral protection body. A room temperature shrinkable tube unit package comprising a cylindrical protective body.   The both ends of the said cylindrical protective body are fastened to the normal temperature shrinkable tube unit by winding an adhesive tape around the both ends of the said cylindrical protective body so that it may clamp | tighten from the outer peripheral side. The package of the normal temperature shrinkable tube unit described in 1.   The other end of the cylindrical protector is overlaid on the outside of one end of the cylindrical protector, and each end is an adhesive tape wound at a position close to the respective end edge. The package of a room temperature shrinkable tube unit according to claim 2, which is fixed to the room temperature shrinkable tube unit.   The said tube has the insulating layer formed with the insulating rubber material, and the external semiconductive layer formed in the outer periphery of the said insulating layer by the coating method, The any one of Claims 1-3 characterized by the above-mentioned. The room temperature shrinkable tube unit package according to the item.   5. The cold-shrinkable tube unit package according to claim 4, wherein each of the insulating layer and the external semiconductive layer is made of silicone rubber.   The room temperature shrinkable tube unit package according to any one of claims 1 to 5, wherein the outer peripheral protector is formed of a plurality of layers of sheets.   The room-temperature-shrinkable tube unit package according to any one of claims 1 to 6, wherein both end portions in the axial direction of the tube have tapered surfaces that are reduced in diameter toward the tip.

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