JP6506727B2 - Installation method of cable protective tube protective bracket and cable protective tube protective bracket - Google Patents

Description

  The present invention relates to a cable protective tube protective fitting that covers the outside of a cable protective tube such as an FEP tube (a hard polyethylene tube with a wave) in which cables such as electric wires and communication wires are accommodated and a method of installing the cable protective tube protective fitting .

  As a fireproof protection structure for covering the outside of a cable protection pipe such as an FEP pipe containing cables such as electric wires and communication wires inside, for example, a metal plate in which a fireproof paint or a fireproof sheet is integrated is a cable protection pipe Patent Document 1 proposes a structure in which a cover is provided via a spacer.

JP 2003-87922 A

  However, in the above-mentioned conventional cable protective tube protective fittings, although the fireproof paint and the fireproof sheet are guaranteed in terms of fire resistance, they have problems with weatherability and water resistance, and are corroded by ultraviolet light, rain water, etc. There was a problem that.

  Then, an object of the present invention is to provide a cable protection tube protective fitting which is excellent not only in fire resistance but also in weather resistance and water resistance.

In order to solve the above-mentioned subject, a cable protection pipe protection bracket concerning the present invention is a cable protection pipe protection bracket which covers the outside of FEP pipe which accommodated cables, such as an electric wire and a communication wire, inside, and has predetermined length A plurality of cable protection tube protection steel pipes covering the outer side of the FEP pipe, and a plurality of cable protection pipe protection steel tubes adjacent to each other face each other, and the adjacent cable protections According to a first feature of the present invention, a protective steel pipe connection fitting covering and connecting an end of the pipe protective steel pipe is provided.
Further, in the cable protective tube protective bracket according to the present invention, in the cable protective tube protective bracket, the cable protective tube protective steel pipe has a protective pipe protective steel pipe main body having a substantially circular cross-sectional shape and its protective pipe protective steel pipe main body. The protective steel pipe connection fitting is constituted by a pair of half protection steel pipe connection fittings connected openably and closably, while being provided with an enlarged diameter part which is provided on both sides and gradually spreads like a skirt. The pair of half protection steel pipe connection fittings are respectively provided on the connection metal fitting main body covering the end of the adjacent cable protection pipe protection steel pipe and on both sides of the connection metal fitting main body, and the diameter gradually decreases. A second feature is that a part is provided.
In the cable protective tube protective fitting according to the present invention, in the cable protective tube protective fitting, the cross-sectional shape of the cable protective tube protective steel pipe is substantially circular, while the cross-sectional shape of the protective steel pipe connection fitting is an inner diameter As a shape having at least a major axis and a minor axis, and the minor axes of both ends of the protective steel pipe connection fitting are smaller than the outer diameter of the protective pipe for protective pipe tube, The third feature of the present invention is that, when covering the end portion of the cable protection tube, the gap between the cut of the cable protection tube protection steel pipe is pinched and narrowed so as to narrow.
Further, in the installation method of the cable protective pipe protective fitting according to the present invention, a pair of half-cuts constituting the protective steel pipe connection fitting is formed by opening the cut of each of the plurality of cable protective pipe protective steel pipes and covering the outside of the cable protective pipe. The protection steel pipe connection fitting is opened so that the cut of the cable protection pipe protection steel pipe to be connected is positioned on a straight line connecting the upper end portion and the lower end portion of the protection steel pipe connection fitting, and then the protection steel pipe connection fitting is It is connecting the said cable protection pipe protection steel pipe adjacent to the said protection steel pipe connection fitting by closing.

  According to the cable protective tube protective fitting and the installation method of the cable protective tube protective fitting according to the present invention, the cables such as the electric wire and the communication wire are accommodated inside by the plurality of metallic cable protective tube protective steel pipes and the protective steel pipe connection fitting. Since the outer side of the cable protection pipe such as the FEP pipe is covered, not only fire resistance but also weather resistance and water resistance can be improved.

It is a top view showing the state where the cable protection pipe protection fitting of the embodiment concerning the present invention was attached to a FEP pipe. It is a perspective view which shows the cable protection pipe protection steel pipe (for curve part) which comprises the cable protection pipe protection bracket of embodiment. (A)-(c) It is a top view of the cable protection pipe protection steel pipe (for a curve part) which constitutes the cable protection pipe protection bracket of an embodiment, a bottom view, and a right side view, respectively. (A), (b) is the top view of the cable protection pipe protection steel pipe (for straight part) which comprises the cable protection pipe protection metal fitting of embodiment, and a bottom view, respectively. It is a perspective view of a protection steel pipe connection metal fitting which constitutes a cable protection pipe protection metal fitting of an embodiment. (A), (b) is the top view of the protection steel pipe connection metal fitting which comprises the cable protection pipe protection metal fitting of embodiment, respectively, It is a right view. (A), (b) is the front view and bottom view of the protection steel pipe connection metal fitting which comprises the cable protection pipe protection metal fitting of embodiment, respectively. It is a perspective view of one half-proof protection steel pipe connection metal fitting which constitutes a protection steel pipe connection metal fitting of an embodiment. (A), (b) is the top view and front view of one half the protection steel pipe connection metal fitting which comprises the protection steel pipe connection metal fitting of embodiment, respectively. (A), (b) is a right side view and a left side view of one half protection steel pipe connection fitting which constitutes protection steel pipe connection fittings of an embodiment, respectively. (A), (b) is a perspective view and front view of the other half protection steel pipe connection metal fitting which constitutes the protection steel pipe connection metal fitting of an embodiment, respectively. (A)-(c) It is a figure which shows the procedure which mounts | wears a FEP pipe | tube with several cable protection pipe protection steel pipe which comprises the cable protection pipe protection metal fitting of embodiment. (A), (b) It is a figure which shows the procedure connected with a protection steel pipe connection metal fitting, after mounting several cable protection pipe protection steel pipe which comprises the cable protection pipe protection metal fitting of embodiment to a FEP pipe | tube.

  Hereinafter, an embodiment of a cable protective tube protective fitting according to an embodiment of the present invention will be described with reference to the drawings. The embodiments described below are merely examples of the present invention, and the present invention is not limited to the following embodiments, and can be appropriately modified within the scope of the technical idea of the present invention.

<Configuration of Cable Protective Pipe Protective Bracket 1 of Embodiment>
As shown in FIG. 1, the cable protection tube protective fitting 1 of the embodiment covers the outside of the FEP tube 3 which accommodates the cables 2 such as electric wires and communication wires inside, and mainly rusts of aluminum, stainless steel, etc. It is composed of a plurality of difficult-to-metal cable protective tubes, protective steel pipes 11, 12 and protective steel pipe connection fittings 13, and similar metal screws, bolts and nuts for fastening them. In addition, in FIG. 1, since the cable protection pipe protection bracket 1 of the embodiment covers the curve portion of the FEP pipe 3, the short cable protection pipe protection steel pipe 11 is used, and the long cable protection pipe protection steel pipe 12 is used. Is not used.

<Configuration of Cable Protective Pipe Protective Steel Tubes 11 and 12>
As shown in FIGS. 2 to 4, the cable protection pipe protection steel pipes 11 and 12 respectively have cuts 11 a and 12 a having a predetermined length and extending to both end portions in the longitudinal direction, and internally including electric wires and communication wires Covers the outside of the FEP tube 3 containing the cables 2. Here, it is a short cable with a total length of 150 mm, mainly used for protecting the curved portion (curved portion) of the FEP tube 3 as shown in FIG. Two types are prepared: a steel pipe 11 and a long cable of 300 mm in total length, and a cable protection pipe and a protection steel pipe 12 mainly used for a straight part (straight part) of the FEP pipe 3. In addition, the cable protection pipe protection steel pipes 11 and 12 are an example, and three or more types of lengths may be prepared.

  The short and long cable protection pipe protection steel pipes 11 and 12 are respectively provided on both sides of the protection pipe protection steel pipe bodies 11b and 12b having a substantially circular cross-sectional shape and the protection pipe protection steel pipe bodies 11b and 12b. In order to ensure connection with the steel pipe connection fitting 13, enlarged diameter portions 11c, 11c, 12c, 12c whose diameter gradually spreads like a skirt are provided.

  The cable protection pipe protection steel pipes 11 and 12 are provided with cuts 11a and 12a, respectively. When external force is applied, the protection pipes are bent to widen or narrow the gaps 11a and 12a. The outer diameters of the cable protection tube protection steel pipes 11 and 12 when no external force is applied are both r1.

<Configuration of Protective Steel Pipe Connecting Bracket 13>
The protective steel pipe connection fitting 13 opens an arbitrary gap to make the ends of the adjacent cable protective pipe protective steel pipes 11 and 12 face each other, and the outer side of the protective pipe protective steel pipe body of the opposing cable protective pipe protective steel pipes 11 and 12 A metal fitting that is connected by pressing it from the outside to the inside of the protective pipe protection steel pipe main bodies 11 and 12 while covering it, and as shown in FIG. 5 etc., a pair of half protection steel pipe connection by connecting bolt 13c1 and nut 13c2. The metal fittings 13a and 13b are connected in an openable / closable manner, and are configured to be fastened by a square rooted fastening bolt 13d1 and a nut 13d2. The head portion of the square rooted fastening bolt 13d1 is formed in a rectangular shape as shown in FIG.

  The pair of half protected steel pipe connection fittings 13a and 13b are provided on both sides of the connection fitting bodies 13a1 and 13b1 and the connection fitting bodies 13a1 and 13b1, respectively, as shown in FIGS. It is composed of narrow diameter portions 13a2 and 13b2 whose diameter is gradually narrowed in order to make the connection with the steel pipes 11 and 12 reliable, that is, difficult to remove after connection.

  On the right side of the connection fitting main body 13a1 of one half of the protective steel pipe connection fitting 13a, on the right side, the surface is parallel to the surface formed by the edges of the narrow diameter portions 13a2 and 13b2. A rotary connection piece 13a11 and a circular bolt hole 13a12 which are cut and raised as described above and rotatably connected via the other half-protected steel pipe connection fitting 13b, a connection bolt 13c1 and a nut 13c2 are provided.

  9A and 9B, on the left side of the connection fitting main body 13a1 of the half protection steel pipe connection fitting 13a, the surface is orthogonal to the surface formed by the edges of the narrow diameter portions 13a2 and 13b2. Formed in the other half split steel pipe connection fitting 13b and the fastening bolt 13d1 with the square rooted fastening bolt 13d2 and the nut 13d2 and a square bolt hole 13a14 corresponding to the square root of the square rooted fastening bolt 13d1 It is done.

  On the other hand, on the right side of the connection fitting main body 13b1 of the other half split steel pipe connection fitting 13b in FIG. 11B, the surface is parallel to the surface formed by the edge portions of the narrow diameter portions 13a2 and 13b2. A rotating connection piece 13b11 and a bolt hole 13b12 are provided which are cut and raised and rotatably connected via one of the half protection steel pipe connection fitting 13a, a connection bolt 13c1 and a nut 13c2.

  Further, on the left side of the connection fitting main body 13b1 of the other half split steel pipe connection fitting 13b in FIG. 11 (b), the surface is raised so as to be orthogonal to the surface formed by the edges of the narrow diameter portions 13a2 and 13b2. And the rectangular head of the square rooted fastening bolt 13d1 is inserted and rotated to engage with one another, the fastening piece 13b13 to be fastened by the one half split steel pipe connection fitting 13a, the square rooted fastening bolt 13d1 and the nut 13d2. Rectangular bolt holes 13b14 are formed for fastening by mating.

  And the narrowing angles of the narrow diameter parts 13a2 and 13b2 with respect to the connecting fitting main bodies 13a1 and 13b1 in the respective half protected steel pipe connecting fittings 13a and 13b are the same with respect to the protective pipe protecting steel pipe main bodies 11b and 12b in the cable protective pipe protecting steel pipes 11 and 12 respectively. The expansion angle of the enlarged diameter portions 11c, 11c, 12c, and 12c is the same or substantially the same.

  Thereby, when the cable protection pipe protection steel pipes 11 and 12 are connected by the protection steel pipe connection metal fittings 13 consisting of a pair of half protection steel pipe connection fittings 13a and 13b, the narrow diameter parts 13a2 and 13b2 and the enlarged diameter parts 11c, 11c and 12c. , 12c in close proximity to each other, and it is possible to prevent, for example, flooding of the inside of the cable protection tube protective fitting 1 as much as possible.

  Further, as shown in FIG. 7B, the cross-sectional shapes of the narrow diameter portions 13a2 and 13b2 when the pair of half protected steel pipe connection fittings 13a and 13b are closed are at least the major diameter r2 and the minor diameter r3 as inner diameters. , Or a shape formed by two circle-shaped circumferences whose central angle is less than 180 degrees, etc., and the pair of half-protected steel pipe connection fittings 13a and 13b are closed. The minor diameter r3 of the shape formed by the narrow diameter portions 13a2 and 13b2 at this time is configured to be smaller than the outer diameter r1 of the protective pipe protective steel pipe main bodies 11b and 12b of the cable protective pipe protective steel pipes 11 and 12.

  Therefore, the cuts 11a and 12a of the plurality of cable protection pipe protection steel pipes 11 and 12 are opened and covered on the outside of the FEP pipe 3, and the protection steel pipe connection fitting 13 opens the pair of half protection steel pipe connection fittings 13a and 13b. When the small diameter parts 13a2 and 13b2 on both sides of the half protection steel pipe connection fitting 13a and 13b are overlapped so as to overlap the enlarged diameter parts 11c, 11c, 12c and 12c on the both sides of the cable protection pipe protection steel pipes 11 and 12 adjacent to each other. Since the short diameter r3 of the narrow diameter portions 13a2 and 13b2 when the split protective steel pipe connection metal fittings 13a and 13b are closed is smaller than the outer diameter r1 of the protective pipe protective steel pipe main bodies 11b and 12b, the cable protective pipe protective steel pipe 11 Even when the portions of the cuts 11a and 12a are expanded to 12, the distance between the cuts 11a and 12a of the cable protection tube protection steel pipes 11 and 12 is narrowed to 0. It can be tightened clamping or from the side.

<Attachment procedure of the cable protective tube protective fitting 1 to the FEP tube 3>
As shown in FIGS. 12 (a) to 12 (c), the operator opens the cut 11a and 12a of each of the cable protection pipe protection steel pipes 11 and 12 according to the degree of straightness and bending of the FEP pipe 3, The outer side of the FEP pipe 3 is covered and mounted at an interval shorter than the total length of the connection fitting 13.

  At that time, the cuts 11a and 12a of each of the cable protection pipe protection steel pipes 11 and 12 are preferably located on the lower side and aligned in a straight line as much as possible.

  Next, as shown in FIG. 13 (a), the operator rotates and expands the pair of half protection steel pipe connection fittings 13a and 13b constituting the protection steel pipe connection fitting 13 via the connection bolt 13c1 and the nut 13c2. As shown in FIG. 13 (b), the small diameter parts 13a2 and 13b2 of the pair of half protection steel pipe connection fittings 13a2 and 13b are adjacent to each other in the enlarged diameter parts 11c and 11c of the plurality of cable protection pipe protection steel pipes 11 adjacent to each other. It is closed so as to cover the upper side, and is fastened by the square rooted fastening bolt 13d1 and the nut 13d2.

  In that case, the cut 11a, 12a of the cable protection tube protection steel pipes 11, 12 connected as much as possible on a straight line connecting the upper end and the lower end of the pair of half protection steel pipe connection fittings 13a, 13b constituting the protection steel pipe connection fitting 13. Are set so that the upper end and the lower end of the pair of half protection steel pipe connection fittings 13a and 13b constituting the protection steel pipe connection fitting 13 are positioned in the vertical direction.

  Then, cuts 11a and 12a are respectively formed in the cable protection pipe protection steel pipes 11 and 12 connected by the protection steel pipe connection fitting 13, and the narrow diameter portion when the half protection steel pipe connection fittings 13a and 13b are closed. Since the minor axis r3 of the shape formed by 13a2 and 13b2 is smaller than the outer diameter r1 of the protective pipe-protected steel pipe body 11b and 12b, even if the cut 11a and 12a is expanded in the cable protective pipe-protected steel pipe 11 and 12 By means of the protective steel pipe connection fitting 13, the cable protective pipe protective steel pipes 11 and 12 can be covered from the outside by sandwiching or tightening so that the gap (gap) between the cuts 11a and 12a is eliminated.

<Effects, etc. of the cable protective tube protective fitting 1 of the embodiment>
Therefore, according to the cable protective tube protective fitting 1 of the embodiment, a plurality of metal cable protective tubes covering the outer side of the FEP tube 3 having the predetermined lengths and the cuts 11a and 12a extending to both longitudinal ends. The ends of the protective steel pipes 11, 12 and the ends of the plurality of cable protective pipes, the protective steel pipes 11, 12 are opposed to each other, and protection is performed while covering the outside of the protective pipe protective steel pipe bodies 11b, 12b of the opposing cable protective pipes, protective steel pipes 11, 12 Since the metallic protective steel pipe connection fitting 13 is connected to the pipe protective steel pipe main bodies 11b and 12b by pressing them from the outside toward the inner side, not only fire resistance, but also weather resistance and water resistance can be improved.

  In particular, in the cable protective tube protective fitting 1 according to the embodiment, the cable protective tube protective steel tubes 11 and 12 are enlarged diameter portions 11c and 12c whose diameters gradually spread like skirts at both ends of the protective tube protective steel pipe bodies 11b and 12b. Are provided, while the diameter of each of the connection fitting bodies 13a and 13b of the pair of half protection steel pipe connection fittings 13a and 13b constituting the protection steel pipe connection fitting 13 is gradually increased in diameter at both ends of the connection fitting bodies 13a1 and 13b1. Narrow diameter portions 13a2 and 13b2 are provided.

  Therefore, when the cable protection pipe protection steel pipes 11 and 12 and the protection steel pipe connection fitting 13 are connected, they are not easily detached and can be reliably connected, and the diameter expanded parts 11c, 11c, 12c, 12c and the narrow diameter parts 13a2 and 13b2 Since overlapping occurs in the inclined state, it is possible to prevent water immersion to the inside of the cable protection tube protective fitting 1 as much as possible, and it is possible to further improve the water resistance.

  Further, in the cable protective pipe protective fitting 1 of the embodiment, the cross-sectional shape of the cable protective pipe protective steel pipes 11 and 12 is substantially circular, but the narrow diameter when the half protective steel pipe connection metal fittings 13a and 13b are closed. The minor axis r3 of the shape formed by the portions 13a2 and 13b2 is smaller than the outer diameter r1 of the protective pipe-protected steel pipe main bodies 11b and 12b.

  Therefore, even if the portions of the cuts 11a and 12a of the cable protection pipe protection steel pipes 11 and 12 are expanded before being connected by the protection steel pipe connection fitting 13, after being connected by the protection steel pipe connection fitting 13, the half protection steel pipe connection fittings There are no gaps in the outside of the FEP tube 3 because the narrow diameter portions 13a2 and 13b of 13a and 13b are pinched or tightened from the outside so that the gap (gap) between the cuts 11a and 12a of the cable protection tube protection steel pipes 11 and 12 becomes zero. It can cover more reliably.

  Further, in the cable protective tube protective fitting 1 of the embodiment, after the plurality of cable protective tube protective steel tubes 11 and 12 open the respective cuts 11 a and 12 a and put them on the outside of the FEP tube 3, the protective steel pipe connection fitting 13 is adjacent The upper ends of a pair of half-protected steel pipe connection fittings 13a and 13b that constitute the protected steel pipe connection fitting 13 when covering and connecting over the enlarged diameter parts 11c and 11c of the plurality of cable protection pipe protection steel pipes 11 And the cut 11a, 12a of the cable protection pipe protection steel pipe 11, 12 connected as much as possible is located on a straight line connecting the lower end portions.

  Therefore, it is possible to hold or tighten from the outside by means of the protective steel pipe connection fitting 13 so that the distance (gap) between the cuts 11a and 12a of the cable protective pipe protective steel pipes 11 and 12 becomes zero. In addition to being able to reliably cover, the cut portions 11a and 12a of the cable protection pipe protection steel pipes 11 and 12 and the fastening portions of the pair of half protection steel pipe connection fittings 13a and 13b constituting the protection steel pipe connection fitting 13 are located below. As a result, the waterproofness and the like can be further improved in this respect as well.

DESCRIPTION OF SYMBOLS 1 cable protection pipe protection fitting 11, 12 cable protection pipe protection steel pipe 11b, 12b cut 11b, 12b protection pipe protection steel pipe main body 11c, 11c, 12c, 12c diameter expansion part 13 protection steel pipe connection metal fitting 13a, 13b 13a1, 13b1 Connection fitting body 13a11 Connection piece for rotation 13a12 Bolt hole 13a13 Fastening piece 13a14 Bolt hole 13b11 Connection piece for rotation 13b12 Bolt hole 13b13 Fastening piece 13b14 Bolt hole 13a2, 13b2 Narrow diameter part 13c1 Connection bolt 13c2 Nut 13d1 13d1 Bolted connection bolted 13d2 Nut 2 Cable 3 FEP pipe (cable protection pipe)

Claims (4)

A cable protection pipe protection fitting that covers the outside of a cable protection pipe containing cables and the like therein,
A plurality of cable protection tube protection steel pipes having a predetermined length and having cuts extending to both longitudinal ends, and covering the outside of the cable protection tube;
And a protective steel pipe connection fitting in which ends of the plurality of adjacent cable protective pipe protection steel pipes are opposed to each other and the ends of the adjacent cable protective pipe protection steel pipes are covered and coupled .
The cable protective tube protective steel pipe is
While a protective pipe protective steel pipe main body having a substantially circular cross-sectional shape and an enlarged diameter portion provided respectively on both sides of the protective pipe protective steel pipe main body and having a diameter gradually expanding like a skirt are provided;
The protective steel pipe connection fitting is
A connection fitting main body covering an end of the adjacent cable protection tube protection steel pipe, which is composed of a pair of half protection steel pipe connection fittings connected openably and closably, each of the pair of half protection steel pipe connection fittings A cable protection tube protection fitting characterized in that it is provided on both sides of a connecting fitting main body and a narrow diameter portion whose diameter is gradually narrowed . In the cable protective tube protective fitting according to claim 1,
While the cross-sectional shape of the cable protective tube protective steel pipe is substantially circular,
The cross-sectional shape of the protective steel pipe connection fitting is a shape having at least a major axis and a minor axis as an inner diameter,
The short diameter of both ends of the protective steel pipe connection fitting is formed smaller than the outer diameter of the cable protective pipe protective steel pipe, and when covering the end of the adjacent cable protective pipe protective steel pipe, the cable protective pipe protective steel pipes A cable protective tube protective fitting characterized in that it is held while being held so as to narrow the gap between the two . A cable protection pipe protection fitting that covers the outside of a cable protection pipe containing cables and the like therein,
A plurality of cable protection tube protection steel pipes having a predetermined length and having cuts extending to both longitudinal ends, and covering the outside of the cable protection tube;
And a protective steel pipe connection fitting in which ends of the plurality of adjacent cable protective pipe protection steel pipes are opposed to each other and the ends of the adjacent cable protective pipe protection steel pipes are covered and coupled.
While the cross-sectional shape of the cable protective tube protective steel pipe is substantially circular,
The cross-sectional shape of the protective steel pipe connection fitting is a shape having at least a major axis and a minor axis as an inner diameter,
The short diameter of both ends of the protective steel pipe connection fitting is formed smaller than the outer diameter of the cable protective pipe protective steel pipe, and when covering the end of the adjacent cable protective pipe protective steel pipe, the cable protective pipe protective steel pipes A cable protective tube protective fitting characterized in that it is held while being held so as to narrow the gap between the two. In the installation method of a cable protective tube protective fitting according to any one of claims 1 to 3
Opening the cut of each of the plurality of cable protection tube protection steel pipes and covering the outside of the cable protection tube,
The protective steel pipe connection fitting is positioned so that the cut of the cable protective pipe protective steel pipe to be connected is located on a straight line connecting the upper end and the lower end of the pair of half protective steel pipe connection fittings constituting the protective steel pipe connection fitting. An installation method of a cable protection pipe protection fitting characterized in that the cable protection pipe protection steel pipe adjacent to the protection steel pipe connection fitting is connected by opening the cover and then closing the protection steel pipe connection fitting.

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