Covering material for joint

Abstract

To provide a covering material for a joint which can reduce deformation resistance and improve workability.SOLUTION: A covering material for a joint 100 includes a cover 110, an adhesive layer 120 provided on the inner surface of the cover 110, and a protective film 130 provided on the inner surface of the adhesive layer 120, and is used to cover the connection part of a cable with the adhesive layer 120 and the cover 110 via the protective film 130, and the protective film 130 is partially attached to the adhesive layer 120.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a covering material for a cable joint. [Background technology]

[0002] As shown in Patent Documents 1 to 5, it has been common practice to cover the connections of cables such as high-voltage cables with a covering material for insulation and waterproofing. Patent Document 1 in particular describes a sheet that includes a sealing material for covering the branch connection (branch portion) and a protective sheet for covering the branch connection via the sealing material (i.e., further covering the sealing material from the outside). A film made of PET, polyethylene, polyester, or the like is disposed on the main surface of the sealing material at a location that corresponds to the contact portion with the branch connection. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-187068 [Patent Document 2] Japanese Patent Application Publication No. 2018-181632 [Patent Document 3] Utility Model Registration No. 2516302 [Patent Document 4] Patent No. 5503710 [Patent Document 5] Japanese Patent Application Laid-Open No. 2002-252918 Summary of the Invention [Problem to be solved by the invention]

[0004] In the sheet of Patent Document 1, a film is disposed on the main surface of the sealing material at a location corresponding to the contact portion with the branch section. When such a sheet is wrapped around the branch connection section, the film inhibits deformation of the sealing material and protective sheet, increasing deformation resistance when deforming the sheet into a ring shape. For this reason, the conventional configuration reduces workability.

[0005] The present invention has been made to solve the above-mentioned problems, and one of its objects is to provide a covering material for a joint that can reduce deformation resistance and improve workability. [Means for solving the problem]

[0006] The covering material for a connection part according to the present invention comprises a cover, an adhesive layer provided on the inner surface of the cover, and a protective film provided on the inner surface of the adhesive layer, and is a covering material for a connection part for covering the connection part of a cable with the adhesive layer and the cover via the protective film, and the protective film is partially attached to the adhesive layer. [Effects of the Invention]

[0007] According to one embodiment of the covering material for a branch connection of the present invention, the protective film can reduce the inhibition of deformation of the adhesive layer and the cover compared to when the protective film is attached to the entire surface of the adhesive layer, thereby reducing deformation resistance and improving workability. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view showing the configuration of a covering material for a connection portion according to an embodiment of the present invention, illustrating the state before covering the connection portion of a cable. [Figure 2] FIG. 2 is a perspective view of the covering material for connection parts shown in FIG. 1. [Figure 3] 3 is a front view showing a state after the covering material for a connection part of a cable in FIG. 1 has covered the connection part. FIG. [Figure 4] FIG. 2 is a front view for explaining the covering material for connection parts of FIG. 1. [Figure 5] 1. FIG. 4 is a front view illustrating another embodiment of a protective film of the covering material for connection parts of FIG. [Figure 6] FIG. 6 is a cross-sectional view of the covering material for connection parts shown in FIG. 5. [Figure 7] 1. FIG. 4 is a front view illustrating another embodiment of a protective film of the covering material for connection parts of FIG. [Figure 8] FIG. 8 is a cross-sectional view of the covering material for connection parts shown in FIG. 7. [Figure 9] 1. FIG. 4 is a front view showing the configuration of another embodiment of the covering material for connection parts of FIG. 1, showing the state before covering the connection part of the cable. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to each embodiment, and the components can be modified and embodied without departing from the spirit of the present invention. Furthermore, various inventions can be formed by appropriately combining multiple components disclosed in each embodiment. For example, some components may be omitted from all the components shown in the embodiments. Furthermore, components of different embodiments may be appropriately combined.

[0010] FIG. 1 is a front view showing the configuration of a covering material 100 for a connection part according to an embodiment of the present invention, showing the state before covering the connection part 11 of a cable 10; FIG. 2 is a perspective view of the covering material 100 for a connection part of FIG. 1; FIG. 3 is a front view showing the state after the covering material 100 for a connection part of FIG. 1 has covered the connection part 11 of the cable 10; and FIG. 4 is a front view for explaining the covering material 100 for a connection part of FIG. 1.

[0011] 1 and 2, the joint covering material 100 is intended to hermetically cover the joint 11 of the cable 10, thereby ensuring the insulation and waterproofing of the joint 11. The joint 11 is formed by connecting a part of the main conductor 13 exposed from the main cable 12 to one end of the branch conductor 15 exposed from the branch cable 14.

[0012] The covering material for connection parts (100) includes a cover (110), an adhesive layer (120), and a protective film (130).

[0013] The cover 110 may be a sheet-like member that appears on the outer surface when the connection covering material 100 covers the connection 11, as shown in Fig. 3. The cover 110 may be made of a material that is insulating and waterproof. Although not limited thereto, examples of the material for the cover 110 include ethylene propylene rubber (EPDM).

[0014] The adhesive layer 120 is provided on the inner surface of the cover 110. The adhesive layer 120 may be made of a flame-retardant material. Although not limited thereto, examples of the material for the adhesive layer 120 include butyl rubber.

[0015] As shown in FIG. 4, the adhesive layer 120 may be slightly smaller than the cover 110 and may have the same overall shape as the cover 110. The cover 110 and the adhesive layer 120 have a substantially trapezoidal main body 112 and a small, substantially trapezoidal extending portion 114 extending from the main body 112. As shown in FIG. 3, after the connection portion 11 is placed on the adhesive layer 120 of the main body 112, the connection portion 11 can be surrounded by the main body 112. Alternatively, the extending portion 114 can be folded back with the extending portion 114 positioned between the main trunk cable 12 and the branch cable 14, and the adhesive layer 120 of the extending portion 114 can be attached to the outer surface of the cover 110 of the main body 112. This allows the main trunk cable 12 and the branch cable 14 to be kept separated and prevents the main body 112 from unwinding.

[0016] The protective film 130 is provided on the inner surface of the adhesive layer 120. When the connection portion 11 is covered with the connection portion covering material 100, the protective film 130 may be interposed between the connection portion 11 and the adhesive layer 120. The protective film 130 may be made of an insulating material. Although not limited to this, examples of the material for the protective film 130 include polyethylene terephthalate (PET).

[0017] Here, in the connection covering material 100 of this embodiment, the protective film 130 is partially attached to the adhesive layer 120. If the protective film 130 were entirely attached to the adhesive layer 120, the protective film 130 would hinder the deformation of the adhesive layer 120 and the cover 110, increasing the deformation resistance of the adhesive layer 120 and the cover 110 when surrounding the connection portion 11 of the cable 10 and reducing workability. However, by partially attaching the protective film 130 to the adhesive layer 120 as in this embodiment, it is possible to reduce the inhibition of the deformation of the adhesive layer 120 and the cover 110 by the protective film 130, thereby reducing the deformation resistance and improving workability.

[0018] 4, the protective film 130 may have an adhesive portion 132 attached to the adhesive layer 120 and a non-adhesive portion 134 not attached to the adhesive layer 120, and the adhesive portion 132 may extend linearly in the longitudinal direction of the cable 10. This makes it possible to more reliably reduce the deformation resistance of the adhesive layer 120 and the cover 110 when the adhesive layer 120 and the cover 110 are deformed to surround the connection portion 11 of the cable 10.

[0019] The covering material 100 for connection parts may further include an intermediate film 140 provided on the inner surface of the adhesive layer 120 so as to be interposed between the non-adhesive portion 134 and the adhesive layer 120. The intermediate film 140 is preferably thinner than the protective film 130 or made of a material more flexible than the protective film 130. Such an intermediate film 140 can reduce the risk of the non-adhesive portion 134 being attached to the adhesive layer 120, and can more reliably reduce the deformation resistance of the adhesive layer 120 and the cover 110.

[0020] The ratio of the thickness of the intermediate film 140 to the thickness of the protective film 130 (thickness of intermediate film 140 / thickness of protective film 130) may be less than 1.0. For example, from the viewpoint of preventing damage to the connection covering material 100 (penetration resistance, etc.), the thickness of the protective film 130 may be 0.050 mm or more and 0.350 mm or less. In this case, from the viewpoint of ensuring flexibility, the thickness of the intermediate film 140 may be, for example, 0.010 mm or more and 0.100 mm or less. Note that, as an example of the thicknesses of the constituent members of the product, the thickness of the protective film is 0.075 mm and the thickness of the intermediate film is 0.025 mm. When the intermediate film 140 is made of the same material as the protective film 130, it is preferable that the intermediate film 140 be thinner than the protective film 130.

[0021] When the protective film 130 is made of PET, it is preferable to use polyethylene (PE), ethylene vinyl acetate (EVA), polyvinyl chloride (PVC), etc. as the material for the intermediate film 140, which is softer than the protective film 130. Among these, it is preferable to use PE from the viewpoint of heat resistance.

[0022] Next, FIG. 5 is a front view illustrating a protective film 230 which is another embodiment of the covering material 100 for connection parts shown in FIG. 1, and FIG. 6 is a cross-sectional view of the covering material 200 for connection parts shown in FIG.

[0023] 5 and 6, the protective film 230 may be bellows-shaped. Even in the bellows-shaped protective film 230, an attached portion attached to the adhesive layer 120 and a non-attached portion not attached to the adhesive layer 120 can be formed, and the deformation resistance of the adhesive layer 120 and the cover 110 can be reduced.

[0024] Next, FIG. 7 is a front view illustrating a protective film 330 which is another embodiment of the covering material 100 for connection parts shown in FIG. 1, and FIG. 8 is a cross-sectional view of the covering material 300 for connection parts shown in FIG.

[0025] 7 and 8, the protective film 330 may have a plurality of convex portions 332 spaced apart from one another, and the tops of the convex portions 332 may be attached to the adhesive layer 120. Even with such a protective film 330, it is possible to form attached portions that are attached to the adhesive layer 120 and non-attached portions that are not attached to the adhesive layer 120, and it is possible to reduce the deformation resistance of the adhesive layer 120 and the cover 110.

[0026] The number, spacing, and density of the protrusions 332 are arbitrary. In the embodiment shown in Fig. 7, when the protective film 330 is viewed from the front, the plurality of protrusions 332 are arranged in a staggered pattern, but the plurality of protrusions 332 may be arranged in other patterns, such as a grid pattern or a radial pattern.

[0027] Next, FIG. 9 is a front view showing another embodiment of the configuration of the covering material 100 for connection parts shown in FIG. 1, showing the state before covering the connection part 21 of the cable 20.

[0028] 1 and other embodiments have been described in which the covering material 100 for a connection portion covers the connection portion 11 between the trunk cable 12 and the branch cable 14, but the covering material 100 for a connection portion may also be used for other covering purposes. For example, as shown in Fig. 9, the covering material 400 for a connection portion may be used to cover the connection portion 21 where a pair of cables 20 are connected in a linear manner.

[0029] 9, cable 20 includes a first cable 22, a second cable 23, and a connection part 21 in which one end of a first conductor 24 exposed from first cable 22 and one end of a second conductor 25 exposed from second cable 23 are connected. In this case, cover 410 and adhesive layer 120 of connection part covering material 400 may be formed in a substantially rectangular shape so as to easily cover connection part 21 of cable 20.

[0030] Although the preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that a person skilled in the art to which the present invention pertains can conceive of various modifications and alterations within the scope of the technical ideas set forth in the claims, and it is understood that these also naturally fall within the technical scope of the present invention. [Explanation of symbols]

[0031] 10, 20: Cable 11, 21: Connection part 12: Main cable 13: Main conductor 14: Branch cable 15: Branch conductor 22: First cable 23: Second cable 24: First conductor 25: Second conductor 100, 200, 300, 400: Covering material for joints 110, 410: Cover 112: Main body 114: Extension part 120: Adhesive layer 130, 230, 330: Protective film 132: Attachment 134: Non-attached area 140: Intermediate film 332: Convex part

Claims

1. Cover and an adhesive layer provided on the inner surface of the cover; a protective film provided on the inner surface of the adhesive layer; Equipped with A covering material for a connection portion for covering a connection portion of a cable with the adhesive layer and the cover via the protective film, The protective film is partially attached to the adhesive layer. Covering material for connection parts.

2. the protective film has an adhesive portion that is attached to the adhesive layer and a non-adhesive portion that is not attached to the adhesive layer, The attachment portion extends linearly in the longitudinal direction of the cable. The covering material for a connection according to claim 1 .

3. The covering material for connection parts according to claim 2, further comprising an intermediate film provided on the inner surface of the adhesive layer so as to be interposed between the non-adhesive portion and the adhesive layer, the intermediate film being made of a material that is thinner or more flexible than the protective film.

4. The protective film is accordion-shaped. The covering material for a connection according to claim 1 .

5. The protective film has a plurality of convex portions spaced apart from one another, and the tops of the convex portions are attached to the adhesive layer. The covering material for a connection according to claim 1 .

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