Cable duct, electric wire accommodation facility, and cable duct installation method

Abstract

To provide a technique capable of extending a cable in a required direction.SOLUTION: A cable duct 16 comprises: a base plate 22 including a mounting part 22a to an edge of a sidewall opening 20 of a cable trough 1 and an opening part 22b facing the sidewall opening 20; a cylindrical duct body 23, which is disposed in the opening part 22b in a penetrating state, for passing a cable 2 extending from the cable trough 1; and a hinge mechanism 26 for mounting the duct body 23 to the base plate 22 in a rotatable state.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a cable duct used for a cable extending from a wire housing facility, the wire housing facility, and a method for installing a cable duct. [Background technology]

[0002] BACKGROUND ART In recent years, cables such as power lines and communication lines are sometimes buried underground using electric wire accommodation facilities such as cable troughs. In order to pull the cables from the electric wire housing facility toward the customer, an opening is sometimes provided in a side wall of the electric wire housing facility, and the cables for the customer are pulled out from this opening. The cable drawn out from the electric wire accommodation facility passes through a protective pipe buried between the electric wire accommodation facility and the customer's home and is extended to the customer's home. The protective tube for the cable may be attached to a side wall of the electric wire housing facility.

[0003] Patent Document 1 discloses a fixture for attaching a protective tube for a cable to a side wall of an electric wire accommodation facility such as a cable trough. The fixture is a member formed using a metal plate, and is attached to an opening in a side wall of the electric wire receiving facility. The mounting fixture has a plate portion formed with a mounting hole that communicates between the inside and outside of the electric wire housing facility, and the protective tube is mounted in the mounting hole of the plate portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-22290 Summary of the Invention [Problem to be solved by the invention]

[0005] The extending direction of the protective tube attached to the electric wire housing equipment by the above-mentioned attachment tool and the cable passing through the protective tube is determined by the direction in which the plate portion in which the attachment hole is formed faces. For this reason, with the above-mentioned mounting fixture, it is not possible to greatly change the direction in which the cable extends relative to the side wall, and it is sometimes difficult to extend the cable in the required direction.

[0006] The present invention has been made in view of the above circumstances, and has an object to provide a technique that enables a cable to be extended in a required direction. [Means for solving the problem]

[0007] (1) A cable duct according to an embodiment of the present invention comprises a base plate having an attachment portion for fitting to the edge of a side wall opening of a wire accommodating facility and an opening facing the side wall opening, a cylindrical duct body that is disposed in a penetrating state in the opening and allows a cable extending from the wire accommodating facility to pass through, and a hinge mechanism that rotatably attaches the duct body to the base plate.

[0008] According to the above configuration, since the hinge mechanism is provided to rotatably attach the duct body to the base plate, the cable passing through the duct body can be extended in the required direction within the rotation range of the duct body. Furthermore, according to the above configuration, by connecting the protective tube for the cable through which the cable passes to the duct main body or passing the protective tube through the duct main body, the protective tube for the cable can be extended in the required direction within the rotation range of the duct main body.

[0009] (2) That is, it is preferable that the duct body has a main body portion having one end facing outward from the electric wire accommodating equipment, and a connecting portion for connecting an external protective tube for the cable to the one end side of the main body portion. In this case, the cable protection tube connected to the connecting portion can be extended in any direction within the rotation range of the duct body, and an external protection tube can be connected from outside the wire housing equipment.

[0010] (3) The duct body may also have an inner peripheral space for passing an inner protective tube for the cable extending from the electric wire housing facility. In this case, the inner protective tube for the cable passing through the inner peripheral space can be extended in any direction required within the rotation range of the duct body.

[0011] (4) Preferably, the cable duct further includes a sealing member that seals a gap between the outer peripheral surface of the duct body and the opening. In this case, it is possible to prevent moisture and the like from entering the wire receiving equipment through the gap between the outer peripheral surface of the duct body and the opening.

[0012] (5) The cable duct may further include another duct body arranged adjacent to the duct body in the left-right direction and penetrating the opening, and another hinge mechanism that rotatably attaches the other duct body to the base plate. With this configuration, the extension directions of the multiple cables and the multiple cable protective tubes can be oriented in different directions.

[0013] (6) Furthermore, if the cable duct further includes another duct body that is arranged adjacent to the duct body in the vertical direction and penetrates the opening, the hinge mechanism may rotatably attach the duct body and the other duct body to the base plate. In this case as well, the extending directions of the plurality of cables and the plurality of protective tubes for the cables can be oriented in different directions.

[0014] (7) Also, from another perspective, an electric wire accommodation facility according to an embodiment of the present invention comprises an electric wire accommodation facility main body having a side wall opening, and the cable duct according to claim 1 attached to the edge of the side wall opening.

[0015] (8) Also, a method according to another embodiment of the present invention from another viewpoint is a method for attaching the above-mentioned cable duct to a wire accommodation facility, and includes the steps of attaching the base plate to an edge of a side wall opening of the wire accommodation facility, and passing a cable extending from the wire accommodation facility through the side wall opening and the opening into the duct body. [Effects of the Invention]

[0016] According to the present invention, the cable can be extended in any direction required. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view of a cable trough to which a cable duct according to a first embodiment is attached. [Figure 2] FIG. 2 is a cross-sectional view of a main part of the cable trough shown in FIG. 1 taken along the XY plane. [Figure 3] 3A and 3B are external views of the cable duct, in which FIG. 3A is a view of the cable duct as seen from the front, and FIG. 3B is a view of the cable duct as seen from above. [Figure 4] FIG. 4 is an enlarged view of the upper bolt member in FIG. 3(a). [Figure 5] FIG. 5 is a cross-sectional view of the cable duct according to the second embodiment taken along the XY plane. [Figure 6] FIG. 6 is a cross-sectional view of the cable duct according to the third embodiment taken along the XY plane. [Figure 7] FIG. 7 is a front view of the cable duct according to the third embodiment. [Figure 8] 8A and 8B are external views of a cable duct according to a fourth embodiment, in which FIG. 8A is a view of the cable duct as seen from the front, and FIG. 8B is a view of the cable duct as seen from above. [Figure 9] 9A and 9B are external views of a cable duct according to a fifth embodiment, in which FIG. 9A is a view of the cable duct as seen from the front, and FIG. 9B is a view of the cable duct as seen from above. DETAILED DESCRIPTION OF THE INVENTION

[0018] Preferred embodiments will now be described with reference to the drawings. [Regarding the first embodiment] FIG. 1 is a perspective view of a cable trough to which a cable duct according to a first embodiment is attached. In FIG. 1, a cable trough 1, which is an electric wire accommodation facility, accommodates a plurality of cables 2 (2a, 2b) and constitutes an electric wire common trench buried underground.

[0019] The cable trough 1 comprises a number of small boxes 3 connected side by side. Each small box 3 is, for example, a member made of precast concrete and formed in a substantially rectangular parallelepiped shape. In the following description, as shown in Fig. 1, the direction along the long sides of the small box 3 is referred to as the longitudinal direction X, and the direction perpendicular to the longitudinal direction X is referred to as the width direction Y. In addition, the direction perpendicular to the XY plane parallel to the longitudinal direction X and the width direction Y is referred to as the up-down direction.

[0020] Each small box 3 has a box body 4 and a cover member 6. The box body 4 has a bottom wall 8 and a pair of side walls 10. The bottom wall 8 is formed in the shape of a rectangular plate with its long sides extending along the longitudinal direction X. A pair of side walls 10 are erected upward along both long sides of the bottom wall 8. Therefore, the box body 4 has a U-shaped cross section. The top surface and both end surfaces in the longitudinal direction X of the box body 4 are open. The cover member 6 is a plate-shaped member made of concrete. The cover member 6 is disposed on the upper ends 10a of the pair of side walls 10 and closes the upper opening of the box body 4.

[0021] A plurality of cables 2 are housed in the internal space S of the cable trough 1. The multiple cables 2 include multiple types of cables such as power cables and communication cables such as telephone lines or optical fibers. The cables 2 are inserted into an inner protective tube 12 (12a, 12b). For example, among a plurality of cables 2, cables 2 of the same type are collectively inserted into one inner protective tube 12. 1, a power cable 2a is inserted through the inner protective tube 12a, and a communication cable 2b is inserted through the inner protective tube 12b.

[0022] The side wall 10 is provided with a knockout portion 14 . The knockout portion 14 is a rectangular portion where the thickness of the side wall 10 is partially thin. The knockout portion 14 is a portion that can easily form a rectangular side wall opening 20 (FIG. 2) by drilling or removing a hole in the knockout portion 14 with a tool such as a grinder.

[0023] The cable duct 16 is attached to the side wall 10 of the cable trough 1 . The cable duct 16 is attached to the side wall 10 at a portion where a side wall opening 20 (FIG. 2) is provided.

[0024] FIG. 2 is a cross-sectional view of a main part of the cable trough 1 shown in FIG. 1 taken along the XY plane. In FIG. 2, the side wall opening 20 of the side wall 10 is a rectangular opening that connects the inside and outside of the small box 3. A part of the communication cable 2b in the internal space S passes through the side wall opening 20. The communication cable 2b passing through the side wall opening 20 is pulled out from the internal space S to the outside of the small box 3. The pulled out communication cable 2b passes through an external protective tube 21 and is routed towards the customer. The external protective tube 21 is a long tubular member that is buried between the cable trough 1 and the customer and protects the cable 2.

[0025] In FIG. 2, the cable duct 16 is attached to the outer surface 10b of the side wall 10 and has the function of guiding the cable 2 drawn out from the internal space S. The cable duct 16 comprises a base plate 22 and a cylindrical duct body 23 . The duct body 23 includes a cylindrical body portion 24 and a connecting portion 25 for connecting the external protective pipe 21 . The communication cable 2b drawn out from the internal space S passes through the inside of the main body 24 and extends toward the external protective tube 21.

[0026] One end 24a of the main body 24 faces outward from the cable trough 1. The other end 24b of the main body 24 is inserted into an opening 22b (described later) of the base plate 22 and the side wall opening 20, and faces inward from the cable trough 1. The connecting portion 25 is provided on one end 24 a side of the main body portion 24 . The external protective pipe 21 includes a protective pipe main body 21a and a joint 21b. The connecting part 25 has an outer peripheral holding surface 25a. The connecting part 25 is inserted into the inner peripheral side of the joint 21b, and a metal belt or the like (not shown) that tightens the joint 21b from the outer peripheral side is attached to the outer peripheral side of the joint 21b. This brings the outer peripheral holding surface 25a and the joint 21b into close contact with each other. As a result, the external protective tube 21 is connected to the connecting part 25.

[0027] 3A and 3B are external views of the cable duct 16, with Fig. 3A being a front view of the cable duct 16 and Fig. 3B being a top view of the cable duct 16. Note that Figs. 3A and 3B show a state in which the central axis K1 of the duct main body 23 (main body portion 24) is perpendicular to the longitudinal direction X.

[0028] The base plate 22 is a rectangular plate-shaped member formed using a structural steel plate such as SS400. 3(a), the two-dot chain line H indicates the inner edge 20a (FIG. 2) of the side wall opening 20 when the base plate 22 is attached to the side wall 10. As shown in FIG. 3(a), the base plate 22 is formed in a rectangular shape that is larger than the inner edge 20a of the side wall opening 20. Therefore, the base plate 22 is attached to the edge of the side wall opening 20 on the outer surface 10 b of the side wall 10 so as to close the side wall opening 20 . Mounting portions 22a are provided at the four corners of the base plate 22. The mounting portions 22a are holes through which anchors that are driven into the outer surface 10b are inserted. The base plate 22 is attached to the side wall 10 by these anchors. The base plate 22 also has an opening 22b, which faces the side wall opening 20, as shown in FIGS.

[0029] A cylindrical duct body 23 is disposed so as to penetrate through the opening 22b. The duct body 23 is a cylindrical member formed using a structural steel plate such as SS400, etc. The duct body 23 is a member through which the cable 2 extending from the cable trough 1 passes toward the outside. As shown in FIGS. 3(a) and 3(b), the duct body 23 is attached to the base plate 22 by a hinge mechanism 26. The hinge mechanism 26 supports the duct main body 23 so that the duct main body 23 can rotate about a rotation axis C1. The rotation axis C1 extends in the vertical direction and is perpendicular to the central axis K1 of the duct main body 23 (main body portion 24). The hinge mechanism 26 includes a pair of upper and lower bolt members 27. The pair of bolt members 27 are fixed to the upper and lower edges of the opening 22b in the outer surface 22c of the base plate 22.

[0030] FIG. 4 is an enlarged view of the upper bolt member 27 in FIG. 3(a). 4, the bolt member 27 includes a bolt 27a and a nut 27b. The nut 27b is threaded onto a shaft portion 27a1. The nut 27b abuts against a head portion 27a2 of the bolt 27a. The head 27a2 and nut 27b of the bolt 27a are welded and fixed to the outer surface 22c of the base plate 22. The central axis of the shaft 27a1 of the bolt 27a is aligned with the rotation axis C1. The shaft 27a1 is inserted into the rotation hole 24c provided in the main body 24 of the duct main body 23 so as to be rotatable relative to the main body 24. The rotation holes 24c are through holes that are provided at two positions, one above the other, that intersect with the rotation axis C in the main body 24 and that penetrate the main body 24 in the up-down direction. 4. The lower bolt member 27 has the same configuration as the upper bolt member 27 shown in FIG. This allows the duct body 23 to rotate around the central axis of the shaft portion 27a1, that is, the rotation axis C1.

[0031] Here, the rotation axis C1 is along the vertical direction as described above and is perpendicular to the central axis K1 of the duct main body 23. Therefore, the duct main body 23 is rotatable along the XY plane. In addition, being rotatable along the XY plane includes not only the case where the central axis K1 of the duct main body 23 is rotatable while being parallel to the XY plane, but also the case where the central axis K1 of the duct main body 23 is slightly deviated from the XY plane but is rotatable approximately along the XY plane. With the above-described configuration, the hinge mechanism 26 of this embodiment supports the duct body 23 so that it can rotate along the XY plane, while restricting vertical rotation of the duct body 23. In other words, the hinge mechanism 26 supports the duct body 23 so that it cannot rotate in the vertical direction.

[0032] As shown in FIG. 3(b), the rotation hole 24c is provided at a position closer to the other end 24b than to the one end 24a in the axial direction of the duct body 23. The two-dot chain line L in FIG. 3(b) indicates the position of the duct body 23 when rotated so that the central axis K1 of the duct body 23 is inclined at an angle of 45 degrees with respect to the longitudinal direction X. The duct body 23 of this embodiment is rotatable at least within a range from the position indicated by the two-dot chain line L to a position where the central axis K1 is perpendicular to the longitudinal direction X. In other words, the duct main body 23 is rotatable at least within a range of 45 to 90 degrees at the angle θ of the central axis K1 with respect to the reference line B. The reference line B is a straight line parallel to the longitudinal direction X that passes through the intersection of the rotation axis C1 and the central axis K1.

[0033] 3(a), the inner peripheral shape of the opening 22b is elliptical, which prevents the edge of the opening 22b from contacting the duct main body 23 within the range in which the duct main body 23 can rotate. The minor axis of opening 22b is aligned with the vertical direction and is slightly larger than the outer diameter of duct main body 23. The major axis of opening 22b is aligned with longitudinal direction X. The inner peripheral shape of opening 22b may be elliptical, or may have an elliptical shape like the outline of a cross section obtained by cutting a cylinder obliquely. In this embodiment, at least a part of the edge of the opening 22b comes into contact with the outer peripheral surface 24d of the duct main body 23 (main body portion 24) when the duct main body 23 rotates to the position of the two-dot chain line L in FIG. 3(b). This makes it possible to prevent the duct main body 23 from rotating to a position where the angle θ is smaller than 45 degrees.

[0034] 2, a sealing member 30 is provided on the inner surface 22d of the base plate 22. The sealing member 30 is a member that seals the gap between the outer peripheral surface 24d of the duct main body 23 and the opening 22b. The sealing member 30 is a member made of a cured resin obtained by curing a resin material such as a moisture-curing silicone resin or a room-temperature-curing resin. The resin material of the sealing member 30 before hardening is applied to the inner surface 22d of the base plate 22 so as to fill the gap between the outer peripheral surface 24d and the opening 22b. The applied resin material then hardens to become the sealing member 30. The seal member 30 can prevent moisture and the like from entering the cable trough 1 through the gap between the outer peripheral surface 24d of the duct body 23 and the opening 22b.

[0035] The sealing member 30 is provided when the cable 2 and the outer protective pipe 21 are laid and buried. The cable 2 and the external protective pipe 21 are buried using the cable duct 16 as follows. First, the external protective tube 21 is connected to the connecting portion 25 of the duct body 23 of the cable duct 16 attached to the cable trough 1 installed underground, and the duct body 23 is rotated to match the extension direction of the external protective tube 21, and the position of the duct body 23 within the rotation range is determined.

[0036] In this way, in this embodiment, the cable duct 16 is equipped with a hinge mechanism 26, so that the communication cable 2b passing through the duct main body 23 and the external protective tube 21 connected to the duct main body can be extended in the required direction within the rotation range of the duct main body 23. 2 shows a state in which the duct body 23 is rotated and laid so that the angle θ is about 45°. After the position of the duct body 23 is determined and the external protective pipe 21 is laid, a resin material is applied to a predetermined location, and the cable trough 1 and the external protective pipe 21 are covered with earth and sand and buried in the ground.

[0037] Generally, the cable trough 1 and the external protective pipe 21 are buried in an excavated portion of a road. Therefore, the installation of the external protective pipe 21 must be completed within a limited time, such as late at night when traffic volume is low. For this reason, the cable trough 1 and the external protective pipe 21 may be buried without waiting for the resin material to harden. At this time, the external protective pipe 21 buried in the ground may be subjected to vertical loads from the soil and sand covering above, and the vertical load acting on the external protective pipe 21 may be transmitted to the unhardened resin material via the duct body 23, causing defects such as voids in the resin material filled between the outer peripheral surface 24d and the opening 22b, and it is thought that the resulting sealing member 30 may not have sufficient sealing properties.

[0038] In this regard, the hinge mechanism 26 of this embodiment supports the duct body 23 of the external protective tube 21 so that it can rotate along the XY plane while restricting rotation in the vertical direction, so that even if a load acts on the external protective tube 21 in the vertical direction, the load can be prevented from being transmitted to the unhardened resin material via the duct body 23. As a result, even if the outer protective tube 21 is buried without waiting for the resin material to harden, the seal member 30 can have sufficient sealing properties.

[0039] In addition, in this embodiment, the duct main body 23 is provided with a connecting portion 25, so that the external protective tube 21 can be connected from the outside of the cable trough 1 and extended in the required direction within the rotation range of the communication cable 2b and the duct main body 23.

[0040] Furthermore, since the cable duct 16 of this embodiment is made up of the base plate 22 and the duct body 23 made of structural steel plate, the cable duct 16 can be obtained at low cost.

[0041] In addition, in this embodiment, since the duct main body 23 is cylindrical, a cylindrical joint can be used as the joint 21b of the external protective tube 21, and the outer diameter dimension of the external protective tube 21 that can be connected to the duct main body 23 can be made to have a range.

[0042] [Regarding the second embodiment] FIG. 5 is a cross-sectional view of a cable duct 16 according to the second embodiment taken along the XY plane. This embodiment differs from the first embodiment in that an external protective tube 21 is inserted into and connected to the inner periphery of a duct body 23. Other points are the same as those of the first embodiment.

[0043] The connecting portion 25 of the duct main body 23 in this embodiment has an inner peripheral holding surface 25b. The external protective tube 21 is inserted into the inner peripheral side of the connecting portion 25. In other words, the connecting portion 25 is fitted onto the outer peripheral surface 21c of the end portion of the external protective tube 21. As a result, the inner peripheral holding surface 25b and the outer peripheral surface 21c of the end portion of the external protective tube 21 are in close contact with each other. As a result, the external protective tube 21 is connected to the connecting portion 25.

[0044] In this case as well, the external protective tube 21 can be connected from the outside of the cable trough 1 and extended in a required direction within the rotation range of the communication cable 2b and the duct body 23.

[0045] [Regarding the third embodiment] Fig. 6 is a cross-sectional view of the cable duct 16 according to the third embodiment taken along the XY plane, and Fig. 7 is a front view of the cable duct 16 according to the third embodiment. Fig. 7 shows a state in which a plurality of inner protective tubes 12 pass through the duct main body 23.

[0046] This embodiment differs from the first embodiment in that a plurality of (three in the illustrated example) inner protective tubes 12 pass through the duct body 23. Other points are the same as those of the second embodiment. In this embodiment, the plurality of cables 2 housed in the internal space S are drawn out together with the plurality of internal protective tubes 12 from the side wall opening 20 .

[0047] The duct body 23 of this embodiment has an inner peripheral space 32 for passing one or more inner protective tubes 12 extending from the cable trough 1. In FIG. 6, the multiple internal protective tubes 12 include one internal protective tube 12a through which multiple power cables 2a are inserted, and two internal protective tubes 12b through which multiple communication cables 2b are inserted.

[0048] In this way, in this embodiment, multiple internal protective tubes 12 with different types of cables 2 inserted therethrough are held, so that multiple internal protective tubes 12 with different types of cables 2 inserted therethrough can be pulled out from a single side wall opening 20 while extending in the required direction.

[0049] [Regarding the Fourth Embodiment] 8A and 8B are external views of a cable duct 16 according to the fourth embodiment, where FIG. 8A is a view of the cable duct 16 from the front, and FIG. 8B is a view of the cable duct 16 from above.

[0050] This embodiment differs from the first embodiment in that another duct body 36 is disposed adjacent to the duct body 23. The duct body 23 and the other duct body 36 are adjacent to each other in the left-right direction and are disposed so as to penetrate through the opening 22b. In this embodiment, the inner peripheral shape of the opening 22b is formed into an elliptical shape so that the duct body 23 and another duct body 36 can be inserted.

[0051] The other duct body 36 has a configuration similar to that of the duct body 23, and includes a cylindrical main body portion 37 and another connecting portion 38. The other duct body 36 is attached to the base plate 22 by another hinge mechanism 40 . The other hinge mechanism 40 supports the other duct main body 36 so as to be rotatable about a rotation axis C2. The rotation axis C2 extends along the vertical direction and is perpendicular to the central axis K2 of the other duct main body 36 (main body portion 37).

[0052] The hinge mechanism 40 includes a pair of upper and lower bolt members 41. The pair of bolt members 41 are fixed to the upper and lower edges of the opening 22b in the outer surface 22c of the base plate 22. The rest of the configuration of the hinge mechanism 40 is the same as the configuration of the hinge mechanism 26 . Therefore, the other hinge mechanism 40 supports the other duct body 36 so that it can rotate along the XY plane, while restricting the other duct body 36 from rotating in the up and down direction.

[0053] In this embodiment, it is possible to connect two external protective tubes 21. Therefore, for example, the communication cable 2b can be passed through one duct body 23 and the external protective tube 21 for the communication cable 2b can be connected thereto, and the power cable 2a can be passed through another duct body 23 and the external protective tube 21 for the power cable 2a can be connected thereto. Furthermore, the extending direction of the external protective pipe 21 held by the duct main body 23 and the extending direction of the external protective pipe 21 held by the other duct main body 36 can be oriented in mutually different directions. Furthermore, without providing a plurality of side wall openings 20, a plurality of external protective tubes 21 can be extended from one side wall opening 20, and the cables 2 can be inserted into the plurality of external protective tubes 21, respectively.

[0054] [Regarding the fifth embodiment] 9A and 9B are external views of a cable duct 16 according to the fifth embodiment, in which FIG. 9A is a view of the cable duct 16 seen from the front, and FIG. 9B is a view of the cable duct 16 seen from above. This embodiment differs from the fourth embodiment in that another duct body 36 is disposed adjacent to the duct body 23 in the vertical direction. The duct body 23 and the other duct body 36 are adjacent to each other in the vertical direction and are disposed so as to penetrate through the opening 22b. The inner peripheral shape of the opening 22b in this embodiment is shaped like two ellipses connected vertically to match the outer peripheral shapes of the duct body 23 and the other duct body 36.

[0055] The other duct body 36 is attached to the base plate 22 by a hinge mechanism 26 . The hinge mechanism 26 supports the duct body 23 and the other duct body 36 so as to be rotatable about a rotation axis C1. The rotation axis C1 is along the vertical direction and is perpendicular to the central axis K1 of the duct body 23 and the central axis K2 of the other duct body 36. The hinge mechanism 26 of this embodiment includes a pair of upper and lower bolt members 27 as well as a connecting member 50 that connects the duct main body 23 to another duct main body 36 . The connecting member 50 is a member provided at a position along the rotation axis C. The connecting member 50 is configured including bolts, nuts, etc. The connecting member 50 connects the duct main body 23 and another duct main body 36 to be able to rotate relatively around the rotation axis C. As a result, the hinge mechanism 26 supports the duct main body 23 and the other duct main body 36 so as to be rotatable about the rotation axis C1.

[0056] In this embodiment as well, it is possible to connect two external protective tubes 21. Therefore, for example, the communication cable 2b can be passed through one duct body 23 and the external protective tube 21 for the communication cable 2b can be connected thereto, and the power cable 2a can be passed through another duct body 23 and the external protective tube 21 for the power cable 2a can be connected thereto. Furthermore, the extending direction of the external protective pipe 21 held by the duct main body 23 and the extending direction of the external protective pipe 21 held by the other duct main body 36 can be oriented in mutually different directions.

[0057] 〔others〕 The embodiments disclosed herein are illustrative in all respects and are not restrictive. In each of the above embodiments, a cable trough 1 (small box 3) is used as the wire storage equipment to which the cable duct 16 is attached, but a handhole or a gutter block that has both storage space for the cable 2 and drainage space can also be used as the wire storage equipment.

[0058] In addition, in the above-described embodiments, the duct body 23 and the other duct body 36 are cylindrical, but the duct body 23 may be, for example, an elliptical cylindrical shape or a rectangular cylindrical shape. In this case, the opening 22b also has a shape corresponding to the shape of the duct body 23. Furthermore, in the fourth and fifth embodiments, the duct body 23 and the other duct body 36 are provided as examples, but other duct bodies may also be provided.

[0059] Furthermore, in this embodiment, the seal member 30 is provided on the inner surface 22d side of the base plate 22, but it may also be provided on the outer surface 22c side of the base plate 22. Furthermore, in the present embodiment, a resin material is applied to the inner surface 22d and the applied resin material is cured to form the sealing member 30. However, for example, a resin sheet having an opening may be attached to the base plate 22 to seal the gap between the duct main body 23 and the opening 22b. In this case, the resin sheet is made of a moisture-curing silicone resin or the like. The opening in the resin sheet has an inner diameter that corresponds to the outer diameter of the duct main body 23. By using such a resin sheet, the sealing member 30 can be easily formed.

[0060] The scope of the present invention is not limited to the above-described embodiments, but includes all modifications within the scope of equivalents to the configurations described in the claims. [Explanation of symbols]

[0061] 1 Cable Trough 2 Cables 2a power cable 2b communication cable 3 Small Box 4 Box body 6 Lid member 8 Bottom Wall 10 side wall 10a top end 10b External surface 12 Internal protection tube 12a Internal protection tube 12b Internal protection tube 14 Knockout section 16 Cable duct 20 Side wall opening 20a Inner edge 21 External protection tube 21a Protection tube body 21b Joint 21c End outer circumferential surface 22 Base plate 22a Mounting part 22b opening 22c External surface 22d Inside 23 Duct body 24 Main body 24a One end 24b Other end 24c Rotation hole 24d Outer surface 25 Connecting part 25a Outer retaining surface 25b Inner retaining surface 26 Hinge mechanism 27 Bolt material 27a Bolt 27a1 Shaft 27a2 head 27b Nut 30 Sealing material 32 Inner space 36 Other duct bodies 37 Main body 38 Other connections 40 Other hinge mechanisms 41 Bolt material 50 Connecting member B Reference line C Rotation axis C1 Rotation axis C2 Rotating axis H Two-dot chain line K1 center axis K2 center axis L Two-dot chain line S interior space X Longitudinal direction Y width direction θ angle

Claims

1. a base plate having an attachment portion for attaching to an edge portion of a side wall opening of the electric wire receiving facility and an opening facing the side wall opening; a cylindrical duct body that is disposed in a penetrating state in the opening and through which a cable extending from the electric wire housing facility passes; a hinge mechanism that attaches the duct body to the base plate so that the duct body cannot rotate in the vertical direction but can rotate along a plane perpendicular to the vertical direction. Cable duct.

2. The duct body includes: a main body portion having one end facing outward from the electric wire receiving facility; a connecting portion for connecting an external protective tube for the cable to one end side of the main body portion; A cable duct according to claim 1.

3. The duct body includes: An inner peripheral space is provided for passing an inner protective tube for the cable extending from the electric wire receiving facility. A cable duct according to claim 1.

4. The duct body further includes a sealing member that seals a gap between the outer peripheral surface of the duct body and the opening. A cable duct according to any one of claims 1 to 3.

5. Another duct body is arranged adjacent to the duct body in the left-right direction and penetrates the opening; another hinge mechanism that rotatably attaches the other duct body to the base plate; Further equipped A cable duct according to any one of claims 1 to 4.

6. Further, another duct body is disposed adjacent to the duct body in the up-down direction and in a state of penetrating through the opening, The hinge mechanism rotatably attaches the duct body and the other duct body to the base plate. A cable duct according to any one of claims 1 to 4.

7. a wire receiving facility body having a side wall opening; and the cable duct of claim 1 attached to the edge of the side wall opening. Electric wire accommodation equipment.

8. A method for attaching the cable duct according to claim 1 to a wire receiving facility, comprising the steps of: attaching the base plate to an edge of a sidewall opening of the wire receiving facility; and passing a cable extending from the wire receiving facility through the side wall opening and the opening into the duct body. How to install a cable duct.

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