JP2018181632A - Branch structure of cable, and protection kit for branching cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branch structure of cable, and a protection kit for branching cable which allow for easy confirmation of the arrangement state of a filling member placed between a trunk cable and a branch cable.SOLUTION: A branch structure includes a sheet 15 covering a branch part 101 where a branch cable 100C is branched from trunk cables 100A, 100B, and a filling member 20 sandwiched between the trunk cable 100B and the branch cable 100C. Consequently, the filling member 20 ensures waterproofness between the trunk cable 100B and the branch cable 100C, and the sheet 15 covers the branch part 101 so as to cover this part. Color of the filling member 20 is different from the color of at least the sheet 15. Consequently, the operator can easily identify which part is the sheet 15, and which part is the filling member 20, by viewing the branch part 101 from the outside.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a cable branching structure and a cable branching protection kit.

  Patent Document 1 describes a branching structure of a cable in which a branching cable branches from a main trunk cable. In this branch structure, the sheet is used to cover the branch portion where the branch cable branches from the main trunk cable. In this branch structure, in order to ensure waterproofness between the main trunk cable and the branch cable, a filling member is disposed between the cables. Moreover, the strip part extended partially from the edge of the sheet | seat is formed, and the said filling part is covered from the outer side by covering between the main trunk cable and a branch cable.

Japanese Utility Model Application Publication No. 6-5046

  In the conventional cable branch structure, the filling member disposed between the main trunk cable and the branch cable is covered with the strip portion. Therefore, there has been a problem that the worker can not confirm from the outside the arrangement state of whether or not the filling member is arranged in a waterproofed state. Further, even if the short strip portion is omitted, it is difficult to confirm the arrangement state of the filling member from the outside because the color of the filling member and the color of the sheet are the same. From the above, it has been required to easily confirm the arrangement of the filling member disposed between the main trunk cable and the branch cable.

  The branch structure of a cable according to an aspect of the present invention is a branch structure of a cable in which a branch cable branches from a main trunk cable, and a sheet for covering a branch portion where the branch cable branches from the main trunk cable, a main trunk cable and a branch cable And a filling member sandwiched between, wherein the color of the filling member is at least different from the color of the sheet.

  The branch structure of the cable includes a sheet that covers a branch portion at which the branch cable branches from the main trunk cable, and a filling member sandwiched between the main trunk cable and the branch cable. Therefore, the filling member secures waterproofness between the main trunk cable and the branch cable, and the sheet covers the branch portion so as to cover the portion. Here, the color of the filling member is at least different from the color of the sheet. Therefore, the worker can easily identify which part is the sheet and which part is the filling member by looking at the branched part from the outside. Therefore, the worker can easily confirm from the outside of the branch part whether or not the filling member is disposed in a manner that can ensure waterproofness by confirming how the filling member is disposed. By the above, the arrangement | positioning condition of the filling member arrange | positioned between a main trunk cable and a branch cable can be confirmed easily.

  The color of the filling member may be different from the color of at least one of the main trunk cable and the branch cable. Thus, the operator can easily identify which part is the main trunk cable and the branch cable and which part is the filling member by looking at the branch part from the outside. Therefore, the arrangement of the filling member disposed between the main trunk cable and the branch cable can be more easily confirmed.

  The standard color difference may be 20 or more in different colors. By this, the operator can clearly recognize different colors by visual observation, and can clearly distinguish the filling member from the other members.

  A cable branching protection kit according to an embodiment of the present invention is a cable branching protection kit for protecting a branching portion at which a branching cable branches from a main trunk cable, and a sheet for covering the branching portion, the trunk cable and And a filling member for sandwiching with the branch cable, wherein the color of the filling member is at least different from the color of the sheet.

  According to this cable branching protection kit, it is possible to obtain the same operation and effect as the above-described cable branching structure.

  The filling member before construction may have a curved shape that is recessed inward on a pair of side surfaces facing each other. In this way, the filling member is deformed into a shape along each cable by arranging so that the curved shape of each side corresponds to the outer peripheral surface of the main trunk cable and the outer peripheral surface of the branch cable, and waterproofness is ensured. It will be easier.

  According to the present invention, it is possible to easily confirm the disposition of the filling member disposed between the main trunk cable and the branch cable.

FIG. 1 is a view showing the appearance of a branched structure of a cable according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a cable branching structure according to an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along the line III-III shown in FIG. FIG. 4 is a view showing a cable protection kit before installation. FIG. 5 is a view showing the filling member before construction. FIG. 6 is a view for showing the optimum amount of the filling member. FIG. 7 is a graph showing the target color relative to the reference color and the standard color difference thereof. FIG. 8 is a graph showing the target color relative to the reference color and the standard color difference thereof.

  Embodiments of the present invention will be described with reference to the drawings. In the following embodiment, although the case where a power cable with a rating of 600 V is targeted is described as an example, the size and the shape may change according to the target voltage. The branched structure of the cable according to the present invention is not limited to the magnitude of the target voltage.

  FIG. 1 is a view showing the appearance of a branched structure of a cable according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a cable branching structure according to an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along the line III-III shown in FIG. FIG. 4 is a view showing a cable protection kit before installation. As shown in FIG. 1, the branch structure 1 insulates and waterproofs the branch portion 101 (see FIG. 2) of the cable 100. In the present embodiment, the term "cable" is used to include electric wires and electric wires. In the present embodiment, the case where the cable 100 is Y-branch connected will be described as an example. In the branch portion 101, the main trunk cable 100B and the branch cable 100C are connected to the main trunk cable 100A. The sheath removing portion 102A of the main cable 100A, the sheath removing portion 102B of the main cable 100B, and the sheath removing portion 102C of the branch cable 100C are connected by the crimping tool 103 to form the branch portion 101. The main trunk cable 100A and the main trunk cable 100B may be cut off from each other, and may be connected together with the branch cable 100C by the crimping tool 103. Alternatively, the main trunk cable 100A and the main trunk cable 100B may be one continuous cable. In this case, the sheath removal part is formed by removing the sheath in the middle of one cable, and the branch cable 100C can be connected to the sheath removal part. The main trunk cable 100B and the branch cable 100C may be bound by the binding band BD.

  The branch structure 1 includes a sheet 15 covering the branch portion 101, and a filling member 20 sandwiched between the main trunk cable 100B and the branch cable 100C. The sheet 15 includes a seal material 2 for covering the branch portion 101, and a protective sheet 3 for covering the branch portion 101 via the seal material 2 (that is, covering the seal material 2 further from the outside). . In the branch portion 101, at least all the portions of the coating removal portions 102A, 102B, 102C and the crimping tool 103 where the electric wires are exposed are covered with the seal material 2, and the seal material 2 covering the branch portion 101 is a protective sheet completely. Covered with 3 (see Figure 2). The branch protection kit 150 for the cable 100 includes the sheet 15 before construction and the filling member 20 before construction.

  The protective sheet 3 is a sheet made of a material excellent in water resistance and insulation. As a material of the protective sheet 3, for example, polyethylene, PVC (polyvinyl chloride), EPDM, silicone rubber or the like can be applied. The thickness of the protective sheet 3 can be set to, for example, about 1 mm, but is not particularly limited as long as it can protect the content of the covered content, and can be set to any dimension.

  The sealing material 2 is a sheet made of a material having excellent water resistance and insulation. As a material of the sealing material 2, for example, an insulating putty containing butyl rubber, silicone rubber, EPDM, NBR or the like can be applied.

  The sealing material 2 before the construction has substantially the same shape as the protective sheet 3 before the construction. In the present embodiment, the sealing material 2 and the protective sheet 3 before construction are substantially rectangular (see FIG. 4). The thickness of the sealing material 2 is not particularly limited, but can be, for example, 2 mm or more, 3 mm or more, 4 mm or more, or 5 mm or more, and 8 mm or less, 10 mm or less, or 12 mm or less. In the main surface of the sealing material 2, a film 4 made of PET, polyethylene, polyester or the like is disposed in a portion corresponding to the contact portion with the branch portion 101. The sealing material 2 after construction is wound around the branch 101 so as to cover the entire circumference of the branch 101. Moreover, the protection sheet 3 after construction covers the sealing material 2 from the outer side over the whole circumference. In addition, although the winding allowance generate | occur | produces on the sheet | seat 15 by winding the sheet | seat 15 around the branch part 101, it abbreviate | omits in FIG.

  The filling member 20 is sandwiched between the main trunk cable 100B and the branch cable 100C, and comes into close contact with the main trunk cable 100B, the branch cable 100C, and the seal member 2 so that the sealability of the branch portion 101 after winding the sheet 15 is achieved. It is a member to secure. As a material of the filling member 20, for example, insulating putty containing butyl rubber, silicone rubber, EPDM, NBR or the like can be applied. The filling member 20 has a predetermined length along the extension direction of the main trunk cable 100B and the branch cable 100C, and is disposed at at least a part of a portion covered by the sheet 15. As shown in FIG. 3, the filling member 20 is in close contact with at least a portion of the outer peripheral surface 100Ba of the main trunk cable 100B that faces the branch cable 100C. The filling member 20 is in close contact with at least a portion of the outer peripheral surface 100Ca of the branch cable 100C that faces the main trunk cable 100B.

  The filling member 20 before construction has a substantially square pole shape. As shown in FIG. 5, the filling member 20 before construction has a pair of side surfaces 20a and 20b facing each other and a pair of side surfaces 20c and 20d facing each other. The filling member 20 before construction has curved shapes 21a and 21b which are recessed inward on the pair of side surfaces 20a and 20b. At the time of construction of the filling member 20, the curved shapes 21a and 21b contact either the outer peripheral surface 100Ba of the main trunk cable 100B or the outer peripheral surface 100Ca of the branch cable 100C. In addition, the thin film which has a crosslinked structure may be formed in the surface of the filling member 20 before construction. Thereby, the shape of the filling member 20 in the state of the branching protection kit 150 is maintained. In addition, the shape of the filling member 20 before construction is not specifically limited, As long as construction is possible, what kind of shape may be sufficient. For example, the side surfaces 20a and 20b may be flat without having the above-described curved shapes 21a and 21b.

  In the case where the branch portion 101 is protected using the branch protection kit 150 as described above, first, the filling member 20 is disposed between the main trunk cable 100B and the branch cable 100C. At this time, the curved shapes 21a and 21b of the filling member 20 are brought into contact with the outer peripheral surfaces 100Ba and 100Ca of the cables 100B and 100C. Further, the filling member 20 is deformed and sandwiched between the cables 100B and 100C so that a gap is not generated between the filling member 20 and the cables 100B and 100C. Thereafter, the sheet 15 is wound so as to cover the branch portion 101 together with the filling member 20.

  Next, with reference to FIG. 6, the shape and quantity of the filling member 20 in the installed state will be described. As shown in FIG. 6, reference lines CL1 and CL2 are set between the main trunk cable 100B and the branch cable 100C. The reference line CL1 is tangent to both one end of the outer peripheral surface 100Ba of the main trunk cable 100B and one end of the outer peripheral surface 100Ca of the branch cable 100C. The reference line CL2 is tangent to both the other end of the outer peripheral surface 100Ba of the main trunk cable 100B and the other end of the outer peripheral surface 100Ca of the branch cable 100C. In this case, as shown in FIG. 6A, it is preferable that the side surfaces 20e and 20f of the filling member 20 arranged at an appropriate amount be disposed outside the reference lines CL1 and CL2. On the other hand, as shown in FIG. 6B, if the side surfaces 20e and 20f of the filling member 20 enter the inside of the reference lines CL1 and CL2, the amount of the filling member 20 may be insufficient. In this case, there is a possibility that a gap may be formed between the seal member 2 wound around the branch portion 101 and the filling member 20. Further, as shown in FIG. 6C, when the side surfaces 20e and 20f of the filling member 20 protrude excessively to the reference lines CL1 and CL2, the sheet 15 may be well wound at the portion of the filling member 20. It may not be possible. Alternatively, by enlarging the sheet 15 in accordance with the location of the excess filling member 20, wrinkles may be generated in the sheet 15 at the portion wound around one main trunk cable 100A.

  Next, the color of the filling member 20 will be described. The color of the filling member 20 is at least different from the color of the sheet 15. In the present embodiment, the sheet 15 includes the sealing material 2 and the protective sheet 3, but the color of the filling member 20 is at least different from the color of the sealing material 2 in contact with the filling member 20. Further, the color of the filling member 20 may be different from the color of the main trunk cable 100B and the branch cable 100C (hereinafter referred to as "the color of the cable 100"). The color of the cable 100 is the color of the cover of the cable 100. From the above, the color of the filling member 20 may be different from the color of the sheet 15 and may be different from the color of the cable 100. At this time, the color of the sheet 15 and the color of the cable 100 may be the same or different. Alternatively, the color of the filling member 20 may be different from the color of the sheet 15 and the same as the color of the cable 100. The color of the main trunk cable 100B and the color of the branch cable 100C may be the same or may be different from each other. When the color of the main trunk cable 100B and the color of the branch cable 100C are different from each other, only the color of one of the cables 100 may be different from the filling member 20.

  In addition, when the branch part 101 is visually observed from the visual direction VD which shows the branch structure 1 in FIG. 2, in the location which can be visually recognized, the color of each component needs to be different. That is, the color relationship of each component as described above is established at least in the portion shown in FIG.

  For example, while the color of the sheet 15 and the cable 100 is black, the color of the filling member 20 may be light blue, red, gray, blue, white or the like. At this time, the color of the filling member 20 may have a predetermined meaning. For example, if the filling member 20 is red, it may indicate that the branch structure 1 is a structure for fire resistance. In addition, the filling member 20 may be used for phase identification (red phase / blue phase / white phase) by making it red, blue or white. As another example, although the color is not specified, the color of the filling member 20 can also be used for voltage division (division of 100 V or 200 V) or division of alternating current or direct current.

More specifically, the standard color difference is preferably 20 or more in different colors. That is, the standard color difference between the color of the filling member 20 and the color of the sheet 15 (and the color of the cable 100) is preferably 20 or more. If the standard color difference is 20 or more, the worker can visually recognize the difference in color between the members at the work site. The standard color difference is indicated by ΔE in the L * a * b * color space, and is defined by the following equation (1) or (2) based on “Formula 19, 20” of “JIS-Z-8781-4”. Be done.

ΔE ^* _ab = [(ΔL ^* ) ² + (Δa ^* ) ² + (Δb ^* ) ² ] ^1/2 (1)

ΔE ^* _ab = [(ΔL ^* ) ² + (ΔC ^* _ab ) ² + (ΔH ^* _ab ) ² ] ^1/2 (2)

Here, a method for defining that the standard color difference is 20 or more as "the color is different" will be described. Measurement of the standard color difference, was carried out using the "3M ^TM Scotchcal ^TM film J Series non-transmissive type color swatches". The measurer compares the predetermined reference color and the target color, and classifies the target color into one that can recognize the target color as "the same color as the reference color" and one that can recognize the target color as "the color different from the reference color". The standard color difference between the color and the reference color was measured. As the standard colors, "Black", "Sky Blue", "Red", "Yellow" and "Tee Green" were adopted. The target color when "black" is the reference color, and the standard color difference ΔE thereof are shown in FIG. 7 (a). The target color when "sky blue" is the reference color and the standard color difference ΔE are shown in FIG. 7 (b). The target color when “red” is the reference color and the standard color difference ΔE are shown in FIG. The target color when “yellow” is the reference color and the standard color difference ΔE are shown in FIG. The target color when "Tee Green" is a reference color, and the standard color difference ΔE thereof are shown in FIG. 8 (b).

  At the time of measurement, the measurer should check the color swatch in a natural light or white light source (for example, office or home fluorescent light, incandescent light, LED lighting, etc.) environment before measuring the standard color difference value. The target color which can be recognized as "the same color as" was selected. That is, the target colors not selected were classified into "a color different from the reference color". After that, the standard color difference values of each color were compared. As a result, even if any of the reference colors shown in FIG. 7A to FIG. 8B is used as the reference color, the reference color and the target color can be any target color having a standard color difference of 20 or more. And could be recognized as "different colors". From the above results, among the colors shown in FIGS. 7A to 8B, combinations of the reference color and the target color having a standard color difference of 20 or more are selected from the colors of the filling member 20, the sheet 15, and the cable 100. It may be adopted as a combination. One of the combinations of the reference color and the target color may be adopted as the color of the filling member 20, and the other may be adopted as the color of the sheet 15 and the cable 100.

  Next, the operation and effects of the branch structure 1 of the cable 100 and the branch protection kit 150 according to the present embodiment will be described.

  The branch structure 1 of the cable 100 includes a sheet 15 for covering the branch portion 101 where the branch cable 100C branches from the main trunk cables 100A and 100B, and a filling member 20 sandwiched between the main trunk cable 100B and the branch cable 100C. ing. Therefore, the filling member 20 secures waterproofness between the main trunk cable 100B and the branch cable 100C, and the sheet 15 covers the branch portion 101 so as to cover the portion. Here, the color of the filling member 20 is at least different from the color of the sheet 15. Therefore, the worker can easily identify which part is the sheet 15 and which part is the filling member 20 by looking at the branch part 101 from the outside. Therefore, the worker can easily confirm from the outside of the branch part 101 how the filling member 20 is disposed in a manner that can ensure waterproofness by confirming how the filling member 20 is disposed. . By the above, the arrangement | positioning condition of the filling member 20 arrange | positioned between the main trunk cable 100B and the branch cable 100C can be confirmed easily. In addition, with the arrangement | positioning condition of the filling member 20, the presence or absence of arrangement | positioning of the filling member 20 (that is, there is no forgetting arrangement of the filling member 20), the quantity of the filling member 20 is appropriate, the filling member 20 is waterproof. It is a situation such as whether it is arranged without a gap with other members so as to secure the property.

  The color of the filling member 20 may be different from the color of at least one of the main trunk cable 100B and the branch cable 100C. Thus, the worker can easily identify which part is the main trunk cable 100B and the branch cable 100C and which part is the filling member 20 by looking at the branch part 101 from the outside. Therefore, the arrangement of the filling member 20 disposed between the main trunk cable 100B and the branch cable 100C can be more easily confirmed.

  The standard color difference may be 20 or more in different colors. Thereby, the operator can clearly recognize different colors by visual observation.

  The branch protection kit 150 for the cable 100 is a branch protection kit 150 for the cable 100 that protects the branch portion 101 where the branch cable 100C branches from the main trunk cable 100B, and the sheet 15 for covering the branch portion 101 And a filling member 20 for sandwiching the cable 100B and the branch cable 100C, wherein the color of the filling member 20 is at least different from the color of the sheet 15.

  According to the branching protection kit 150 of the cable 100, the same operation and effect as the branching structure 1 of the above-described cable 100 can be obtained.

  The filling member 20 before construction may have curved shapes 21a and 21b that are recessed inward on the pair of side surfaces 20a and 20b facing each other. By this, the filling members 20 are arranged such that the curved shapes 21a and 21b of the side surfaces 20a and 20b correspond to the outer peripheral surface 100Ba of the main trunk cable 100B and the outer peripheral surface 100Ca of the branch cable 100C. It becomes easy to ensure waterproofness by deforming to a shape along 100C.

  The present invention is not limited to the embodiments described above.

  For example, in the above-described embodiment, the branch structure in the case of Y-branch connection of cables is described as an example, but the branch structure of the present invention may be adopted for a cable related to X-branch connection.

  DESCRIPTION OF SYMBOLS 1 ... Branch structure, 15 ... Sheet | seat 20 ... Filling member, 100 ... Cable, 100A, 100B ... Main trunk cable, 100C ... Branch cable, 101 ... Branch part, 150 ... Protection kit for branch.

Claims (5)

Branching structure of the cable where the branch cable branches from the main trunk cable,
A sheet covering a branch portion where the branch cable branches from the main trunk cable;
A filling member interposed between the main trunk cable and the branch cable;
A branched structure of a cable, wherein the color of the filling member is at least different from the color of the sheet.   The cable branching structure according to claim 1, wherein a color of the filling member is different from a color of at least one of the main trunk cable and the branch cable.   The cable branching structure according to claim 1, wherein the standard color difference is 20 or more in different colors. It is a protection kit for cable branching which protects the branch part which a branch cable branches from a main trunk cable,
A sheet for covering the branch portion;
And a filling member for sandwiching the main trunk cable and the branch cable,
A protective kit for branching cables, wherein the color of the filling member is at least different from the color of the sheet.   The cable protection kit according to claim 4, wherein the filling member before installation has a curved shape which is recessed inward on a pair of side surfaces facing each other.

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