Pipe and cable laying methods

Abstract

This pipeline (1) is for laying a cable (100), and is provided with a suspension wire (10), a plurality of hangers (20) that are held by the suspension wire (10) and have through-holes (30) that accommodate the cable (100), and a groove (13) that extends along an axial direction of the suspension wire (10). The groove (13) has openings (131) that communicate with the through-holes (30), and the openings (131) have a smaller width than a maximum width of an interior (132) of the groove (13).

Description

[Technical Field]

[0001] The present invention relates to a conduit for laying a cable such as an optical fiber cable, and a method for laying the cable. For designated states where incorporation by reference of literature is permitted, the contents of Patent Application No. 2021-070668 filed in Japan on April 19, 2021 are incorporated by reference into this specification and made a part of the description of this specification. [Background technology]

[0002] A single-stranded suspension line is known that includes a suspension line and a plurality of hanger members attached to the suspension line at predetermined intervals (see, for example, Patent Document 1). The hanger members have cable through-holes through which optical drop cables are arranged. When using this single-stranded suspension line to install optical drop cables, first, lead-in wires are inserted into the cable through-holes of the hanger members, and the optical drop cables are attached to the lead-in wires. The optical drop cables are then pulled by the lead-in wires, and installed by drawing the optical drop cables into the cable through-holes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-178563 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned single-strand suspension cable, the cable through holes are arranged at a predetermined interval, which makes the insertion of the lead-in wire complicated and reduces the workability of laying the optical drop cable.

[0005] The problem to be solved by the present invention is to provide a conduit in which a cable can be easily laid, and a cable laying method. [Means for solving the problem]

[0006] [1] The conduit of the present invention is a conduit for laying a cable, comprising a suspension wire, a hanger held by the suspension wire and having a storage space for storing the cable, and a groove extending along the axial direction of the suspension wire, wherein the groove has an opening communicating with the storage space, and the opening has a width smaller than the maximum width inside the groove.

[0007] [2] In the above invention, the suspension wire may comprise a support wire and a covering portion covering the support wire, and the groove may be formed in the covering portion so that the opening opens into the storage space.

[0008] [3] In the above invention, the conduit may have a plurality of hangers arranged at intervals along the axial direction of the suspension wire, and each of the hangers may have an annular shape that is connected to the covering portion to form a through hole through which the cable is inserted.

[0009] [4] In the above invention, the hanger may be formed integrally with the covering portion.

[0010] [5] In the above invention, the groove may be formed continuously over the entire axial length of the suspension wire.

[0011] [6] In the above invention, the pipeline may have a plurality of the grooves.

[0012] [7] In the above invention, the width of the opening may be 80% or less of the maximum width inside the groove.

[0013] [8] In the above invention, the groove may be formed in a portion of the covering portion below the support wire, the hanger may be connected to a portion of the covering portion below the support wire, and the opening may open downward.

[0014] [9] The cable laying method of the present invention is a cable laying method using the above-mentioned conduit, and includes a first step of connecting the cable to a first end of a wiring member having a thin wire portion and a thick wire portion, the first end being on the thin wire portion side; a second step of inserting the wiring member into the groove from a second end of the wiring member on the thick wire portion side; and a third step of inserting the cable into the storage space by pulling the cable via the wiring member while holding the thick wire portion in the groove and positioning the thin wire portion in the storage space, wherein the thin wire portion is thinner than the width of the opening, and the thick wire portion is thicker than the width of the opening and thinner than the maximum width inside the groove.

[0015]

[10] In the above invention, the opening may have a width smaller than a width of the cable.

[0016]

[11] In the above invention, the thin line portion and the thick line portion may be formed of members independent of each other. [Effects of the Invention]

[0017] According to the present invention, the cable can be inserted into the storage space of the hanger using the wire-passing member while the opening is held in a groove having a width smaller than the maximum width of the interior, making it easy to lay the cable. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view showing an example of a pipeline according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] FIG. 3 is a cross-sectional view showing a modified example of the pipeline in the first embodiment of the present invention. [Figure 4] FIG. 4 is a side view illustrating a cable laying method using a conduit in the first embodiment of the present invention. [Figure 5]FIG. 5 is a perspective view showing an example of a pipeline according to the second embodiment of the present invention. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] First Embodiment Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing an example of a pipeline in a first embodiment. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1.

[0020] The conduit 1 in this embodiment is a member used to hang a cable 100 (see FIG. 4) such as an optical fiber cable. The conduit 1 includes a suspension wire 10 and a hanger 20.

[0021] The suspension wire 10 is suspended from a utility pole or the like. As shown in FIG. 1, the suspension wire 10 includes a support wire 11 and a covering portion 12. The support wire 11 is a wire having a predetermined strength. Examples of the wire include an FRP (Fiber Reinforced Plastics) rod and a wire made by twisting a plurality of steel wires. A laminated wire or a single steel wire or the like can be used.

[0022] 2, the covering portion 12 has a cylindrical portion 121, a neck portion 122, and a plate-like portion 123. The cylindrical portion 121, the neck portion 122, and the groove-forming portion 123 are integrally formed. The covering portion 12 can be made of a resin material such as polyethylene.

[0023] The tubular portion 121 has a cylindrical shape that covers the outer periphery of the support wire 11. A neck portion 122 that is narrower than the tubular portion 121 is provided at the lower end of the tubular portion 121. The neck portion 122 extends along the axial direction of the suspension wire 10 (the Y direction in the figure) between the tubular portion 121 and the groove-forming portion 123, and connects the tubular portion 121 and the groove-forming portion 123.

[0024] A groove-forming portion 123 is provided at the lower end of the neck portion 122. An upper surface 123a of this groove-forming portion 123 is connected to the lower end of the neck portion 122. This groove-forming portion 123 has a curved plate shape that protrudes toward the support wire 11 side, and extends along the axial direction of the suspension wire 10, similar to the neck portion 122. As shown in FIG. 2, this groove-forming portion 123 has a lower surface 123b located on the opposite side to the suspension wire 10. The shape of the groove-forming portion 123 is not particularly limited to the above, and may be, for example, an uncurved flat plate shape or a column shape.

[0025] A groove 13 is formed on the lower surface 123b, recessed toward the suspension wire 10. The groove 13 is formed in a portion of the covering portion 12 that is lower than the support wire 11. As will be described later, this groove 13 is used to insert a wiring rod 201 that pulls the cable 100 (see FIG. 4). In this embodiment, the groove 13 is formed at a position where the central axis of the suspension wire and the central axis of the groove 13 coincide in the vertical direction.

[0026] The arrangement of the groove 13 is not limited to this. The groove 13 is used for inserting the wiring rod 201. Therefore, the groove 13 only needs to be formed so as to be positioned at least above the existing cable so that the cable 100 pulled by the wiring rod 201 does not slip under the existing cable when the cable 100 is tensioned. Specifically, the groove 13 may be formed at a position offset from the central axis of the suspension wire 10 in the vertical direction. Alternatively, in the case where the groove-forming portion 123 forms the upper half of a ring made up of the groove-forming portion 123 and the hanger 20, the groove 13 may be formed at any position on the inner circumferential surface of the groove-forming portion 123.

[0027] As shown in Figure 1, the groove 13 in this embodiment extends from the first end 123c to the second end 123d of the groove forming portion 123 on the underside 123b of the groove forming portion 123, and is formed continuously over the entire axial direction of the suspension wire 10.

[0028] As shown in Fig. 2, the groove 13 opens downward (-Z direction) and has a substantially circular outer shape in cross-section. Therefore, the width W1 of the opening 131 of the groove 13 is smaller than the maximum width W2 of the interior 132 of the groove 13 (W1 < W2). This opening 131 is continuously formed over the entire axial direction of the suspension line 10. In this embodiment, the groove 13 has a circular cross-sectional shape, but is not particularly limited thereto. The cross-sectional shape of the groove 13 may be any shape that allows the wire-passing rod 201 to be inserted, for example, the groove 13 may have a cross-sectional shape such as a polygon including a rectangle, an ellipse, or the like.

[0029] When the pipeline 1 is used for laying cables, as will be described later, a wire-passing member 200 including a wire-passing rod 201 and a wire-passing string 202 thinner than the wire-passing rod 201 is used to insert the cable 100 into the pipeline 1. The width W1 of the opening 131 in this embodiment is smaller than the diameter D1 of the wire-passing rod 201 (W1 < D1) and larger than the diameter D2 of the wire-passing string 202 (W1 > D2). On the other hand, the maximum width W2 of the interior 132 is equal to or greater than the diameter D1 of the wire-passing rod 201 (W2 ≧ D1) and larger than the diameter D2 of the wire-passing string 202 (W2 > D2). That is, the groove 13 can hold the wire-passing rod 201, but the wire-passing string 202 has a shape that allows it to fall out of the groove 13.

[0030] The width W1 of the opening 131 may be 80% or less of the maximum width W2 of the interior 132 (W1 ≦ 0.8 × W2), or may be 50% - 60% of the maximum width W2 of the interior 132 (0.5 × W2 ≦ W1 ≦ 0.6 × W2). <000,0129> A plurality of hangers 20 are provided at both ends in the width direction (X direction in the figure) of the groove forming portion 123. The plurality of hangers 20 are connected to a portion of the covering portion 12 below the support line 11. The plurality of hangers 20 are arranged at predetermined intervals along the axial direction of the suspension line 10. This hanger 20 is composed of the same material as the groove forming portion 123 and is integrally formed with the groove forming portion 123.

[0032] The hanger 20 has an annular shape with a portion missing, and is connected to the covering portion 12 at the missing portion to form a through hole 30. A cable 100 such as an optical fiber is inserted into the through hole 30 of the hanger 20, and the cable 100 is supported on an inner peripheral surface 31 of the through hole 30. The groove 13 opens into the through hole 30, and is thereby in communication with the through hole 30. The through hole 30 in this embodiment corresponds to an example of the "accommodation space" in the present invention.

[0033] Although the hanger 20 in this embodiment has a circular ring shape, the shape is not particularly limited thereto. For example, the hanger 20 may have a polygonal ring shape including a rectangle, or an elliptical ring shape. Furthermore, in this embodiment, the shape of the through-hole 30 is circular following the shape of the covering portion 12 and the hanger 20, but the shape is not limited thereto. The shape of the through-hole 30 may be a polygonal shape including a rectangle, or an elliptical shape.

[0034] Here, an example of a method for manufacturing the conduit 1 will be described. The conduit 1 of this embodiment can be manufactured by extrusion molding. For this extrusion molding, an extruder can be used that includes at least a die section in which a hole having the same cross-sectional shape as the resin member to be manufactured is formed, a supply section that supplies resin to the die section, and a shutter provided on the resin discharge side of the die section. In this embodiment, the die section uses a die that has a first hole having the same cross-sectional shape as the covering section 12 and a second hole that is connected to the first hole and has the same cross-sectional shape as the hanger 20. In addition, the shutter used has the function of opening and closing the second hole that discharges the resin that will become the hanger section 20.

[0035] In this extrusion molding machine, first, the support wire 11 is fed into the die section. Then, while resin is supplied from the supply section to the die section, the support wire 11 and resin are simultaneously discharged from the first and second holes, thereby extruding and molding a cylindrical portion 121 that covers the periphery of the support wire 11, a neck portion 122, a groove-forming portion 123, and a hanger 20. During this extrusion molding, the second hole is closed with a shutter at a predetermined cycle to block the resin in the second hole, thereby forming a pipeline 1 that has a plurality of hangers 20 arranged intermittently.

[0036] In this embodiment, only one groove 13 is formed in the groove forming portion 123, but this is not limited thereto, and multiple grooves 13 may be formed. FIG. 3 is a cross-sectional view showing a modified example of the conduit in the first embodiment. In this modified example, multiple (three in this example) grooves 13 are formed on the lower surface 123b of the groove forming portion 123. The multiple grooves 13 are aligned along the width direction of the groove forming portion. By forming multiple grooves 13 in the groove forming portion 123 as in this modified example, it becomes possible to lay multiple cables simultaneously using multiple wiring rods.

[0037] Next, a method for laying a cable using a conduit according to the first embodiment will be described. Fig. 4 is a side view illustrating the method for laying a cable using a conduit according to the first embodiment. In the cable laying method of this embodiment, the cable 100 is laid by pulling the cable 100 into the conduit 1 using the wiring member 200 as follows.

[0038] First, prepare a wire passing member 200 as shown in FIG. 4. As the wire passing member 200 of the present embodiment, a member connecting a wire passing rod 201 and a wire passing string 202 to each other is used. The wire passing rod 201 is a rod-shaped member made of a resin material such as FRP or PET (polyethylene terephthalate), and has a circular cross-sectional shape. On the other hand, the wire passing string 202 is a string-shaped member made of a resin material such as polypropylene or polyester, has a circular cross-sectional shape, and has a lower bending rigidity than the wire passing rod 201. In the present embodiment, the wire passing string 202 and the wire passing rod 201 are connected by tying the wire passing string 202 to the wire passing rod 201. Note that the connection method of the wire passing string 202 and the wire passing rod 201 is not limited to this, and for example, the wire passing string 202 may be connected by fixing it to the wire passing rod 201 using an adhesive tape or a jig.

[0039] Also, the diameter D2 of the wire passing string 202 is smaller than the diameter D1 of the wire passing rod 201. The wire passing rod 201 in the present embodiment corresponds to an example of the "thick wire portion" in the present invention. The wire passing string 202 in the present embodiment corresponds to an example of the "thin wire portion" in the present invention.

[0040] Next, connect the cable 100 to the third end 200a on the wire passing string 202 side of the wire passing member 200 (first step). In the present embodiment, the cable 100 and the wire passing string 202 are connected by tying the wire passing string 202 to the cable 100. Note that the connection method of the cable 100 and the wire passing string 202 is not limited to this, and for example, the cable 也可以通过使用胶带或夹具将其固定在通线绳202上进行连接。

[0041] Next, insert the wire passing member 200 from the fourth end 200b on the wire passing rod 201 side of the wire passing member 200 into the groove 13 (second step). In the present embodiment, the fourth end 200b of the wire passing member 200 is inserted into the groove 13 from the first end 123c side of the pipe 1. As described above, since the diameter D1 of the wire passing rod 201 is larger than the width W1 of the opening 131 of the groove 13 (see FIG. 2) (W1 < D1), the wire passing rod 201 is held by the groove 13 without falling out of the groove 13.

[0042] Next, by further pushing the wire-passing rod 201 inserted into the groove 13 toward the second end portion 123d side of the pipe 1, the wire-passing string 202 connected to the wire-passing rod 201 is drawn into the through-hole 30. As described above, the diameter D2 of the wire-passing string 202 is smaller than the width W1 of the opening 131 of the groove 13 (see FIG. 2) (D2 < W1). Further, the opening 131 of the groove 13 is connected to the through-hole 30. For this reason, after the wire-passing string 202 is once drawn into the groove 13 by the wire-passing rod 201, it falls off from the opening 131 of the groove 13 due to its own weight and is accommodated in the through-hole 30. When the wire-passing string 202 does not fall off from the opening 131 of the groove 13 due to its own weight, for example, an operator may manually pass the wire-passing string 202 through the opening 131 and position it in the through-hole 30.

[0043] Next, as shown in FIG. 4, while holding the fourth end portion 200b on the wire-passing rod 201 side of the wire-passing member 200 in the groove 13 and positioning the wire-passing string 202 in the through-hole 30, the wire-passing rod 201 is pulled toward the second end portion 123d side of the pipe 1. At this time, since the cable 100 is pulled by the wire-passing string 202 positioned in the through-hole 30, the cable 100 is drawn into the through-hole 30 following the wire-passing string 202. In the present embodiment, the width W1 of the opening 131 of the groove 13 (see FIG. 2) is smaller than the diameter D3 of the cable 100 (W1 < D3). Thereby, the intrusion of the cable 100 into the groove 13 can be prevented.

[0044] Then, by continuously pulling the wire-passing rod 201 toward the second end portion 123d side of the pipe 1, the cable 100 is inserted through all the through-holes 30 (third step). As described above, the cable 100 can be laid.

[0045] In the conduit 1 and cable laying method of the above embodiment, simply inserting the wire-running rod 201 into the groove 13 causes the wire-running string 202 to slip out of the opening 131 of the groove 13 and be housed inside the through-hole 30. Therefore, the wire-running rod 201 and the wire-running string 202 can be easily inserted into all of the through-holes 30 without getting caught on the intermittently arranged hangers 20. Therefore, by pulling the cable 100 connected to the wire-running string 202 with the wire-running string 202, the cable 100 can be inserted into all of the through-holes 30. In this way, since the wire-running member 200 can be easily inserted into the through-holes 30, the cable 100 can be easily laid.

[0046] Furthermore, after the first cable laying operation, additional cable laying work may be performed. In conventional conduits, this additional cable laying work may narrow the clearance of the through-hole due to the existing cable, preventing the insertion of the wire-pulling member. In contrast, in this embodiment, when the wire-pulling rod 201 is inserted into the groove 13 provided above the through-hole 30, the existing cable is present inside the through-hole 30 of the hanger 20, not inside the groove 13, so the existing cable does not prevent the insertion of the wire-pulling rod 201.

[0047] In addition, there are cases where work is performed to take out some cables from multiple laid cables and branch them in different directions. When performing such work, the conduit 1 in the above embodiment makes it possible to easily take out the cables from between the hangers 20. Furthermore, if the conduit 1 is installed in advance at the branch destination and the cable to be branched is installed using the conduit 1, the branching work can be easily performed.

[0048] Furthermore, as in this embodiment, the groove 13 is formed over the entire axial length of the suspension wire 10, so that the wiring rod 202 can be easily inserted from the first end 123c to the second end 123d of the conduit 1, thereby improving the workability of laying the cable 100.

[0049] Second Embodiment Fig. 5 is a perspective view showing an example of a pipeline in the second embodiment. FIG.

[0050] This embodiment differs from the first embodiment in that (1) a groove is formed in the cylindrical portion of the covering portion, and (2) the hanger is directly connected to the cylindrical portion, but other configurations are the same as those of the first embodiment. Below, only the cylindrical portion 121B and the hanger 20B in the second embodiment will be described, and parts that are the same as those in the first embodiment will be assigned the same reference numerals and will not be described again.

[0051] As shown in Figures 5 and 6, in the conduit 1B, the cylindrical portion 121B of the covering portion 12B of the suspension wire 10B has an elliptical cylindrical shape. The support wire 11 is provided inside this cylindrical portion 121B so as to be eccentric in the +Z direction. In addition, a groove 13 extending over the entire axial length of the suspension wire 10B is provided at the lower end of the cylindrical portion 121B. The covering portion 12B can be produced by covering the support wire 11 with a resin material by extrusion molding or the like. The cross-sectional shape of the covering portion 12B is not particularly limited to the above.

[0052] A plurality of hangers 20B are provided at predetermined intervals along the axial direction of the suspension wire 10 on the cylindrical portion 121B. The hangers 20B have an annular shape with a missing portion, but the missing portion is smaller than that of the first embodiment. The hangers 20B are connected to the cylindrical portion 121B at the missing portion, thereby forming a through hole 30. The hangers 20B of this embodiment are manufactured by extrusion molding or the like separately from the suspension wire 10B. Then, at the site where the cable 100 is laid, the manufactured hangers 20B are joined to the suspension wire 10B by ultrasonic bonding or the like. By manufacturing the suspension wire 10B and the hangers 20B separately in this manner, the conduit 1B can be transported in a state where the suspension wire 10B and the hangers 20B are separated, facilitating transportation of the conduit 1B. The hangers 20B may also be joined to the suspension wire 10B at the factory where the suspension wire 10B and the hangers 20B are manufactured. Alternatively, the suspension wire 10B and the hanger 20B may be integrally formed using the extrusion molding method described in the first embodiment.

[0053] Furthermore, when laying a cable using the conduit 1B of this embodiment, the same procedure as in the first embodiment can be used, so that the cable can be laid easily in the same manner as in the first embodiment.

[0054] It should be noted that the above-described embodiments have been described to facilitate understanding of the present invention, and are not intended to limit the present invention. Therefore, each element disclosed in the above-described embodiments is intended to include all design modifications and equivalents that fall within the technical scope of the present invention.

[0055] For example, in the above embodiment, the hangers 20, 20B are arranged at equal intervals, but this is not limiting. The intervals between the hangers 20, 20B may be different from each other.

[0056] Furthermore, the grooves 13 do not have to be formed over the entire axial length of the suspension wire 10. For example, in the first embodiment, instead of forming the grooves 13 directly in the groove-forming portion 123, a cylindrical portion in which the grooves 13 are formed may be provided on the underside of the groove-forming portion 123 of the covering portion 12 so as to protrude downward, and the cylindrical portion may be arranged intermittently in the axial length of the suspension wire 10. Alternatively, the cylindrical portion may be made of a separate member independent of the covering portion 12, and the cylindrical portion may be joined to the covering portion 12.

[0057] Alternatively, in the second embodiment, a protruding portion that protrudes downward may be provided on the cylindrical portion 131B of the covering portion 12B, grooves 13 may be formed in this protruding portion, and the protruding portion may be arranged intermittently in the axial direction of the suspension wire 10B. Alternatively, the protruding portion may be made of a separate member independent of the covering portion 12B, and the protruding portion may be joined to the covering portion 12B.

[0058] Alternatively, the groove 13 may be formed at a position where an operator can insert or remove the wiring rod 201 from the vicinity of the first or second end 123c, 123d. For example, the groove 13 may not be formed at the first or second end 123c, 123d, but may be formed throughout the entire central portion excluding the first and second end 123c, 123d.

[0059] Furthermore, in the covering portion 12 of the first embodiment, the neck portion 122 may be omitted, and the groove forming portion 123 may be directly connected to the cylindrical portion 121.

[0060] In the second embodiment, a spiral hanger having a spiral shape with ends may be hung from the suspension wire 10B instead of the hanger 20B. In this case, the cable 100 is housed inside this spiral hanger.

[0061] Furthermore, in the above-described cable laying method, the first step of connecting the cable 100 to the third end 200a of the wiring member 200 on the wiring string 202 side is followed by the second step of inserting the wiring member 200 into the groove 13 from the fourth end 200b of the wiring member 200 on the wiring rod 201 side. However, this is not limiting. For example, the wiring string 202 may be connected to the wiring rod 201 (first step) after the wiring rod 201 is inserted into the groove 13 (second step). Alternatively, the wiring string 202 may be connected to the wiring rod 201 (first step) while the wiring rod 201 is being inserted into the groove 13 (second step). In other words, the second step may be performed before the first step, or the first and second steps may be performed simultaneously.

[0062] In the above-described cable laying method, the wiring member 200 is composed of mutually independent members, but is not limited to this. For example, the wiring member may be a single linear member in which a thick wire portion and a thin wire portion are integrally formed. [Explanation of symbols]

[0063] 1…Pipe line 10,10B…hanging wire 11…Support line 12, 12B...coated part 121, 121B...Cylindrical part 122...Neck 123...Groove forming part 123a…Top surface 123b…Bottom surface 13...Groove 131...Opening 132...Inside 20,20B…Hanger 30...Through hole 31...Inner peripheral surface 100...Cable 200...Wire-passing member 200a...Third end 200b...Fourth end 201...Wire-pulling rod 202...Wire string

Claims

1. A conduit for laying cables, comprising: Suspension wire and a hanger that is held by the suspension wire and has a storage space for storing the cable; a groove extending along the axial direction of the suspension wire, The groove has an opening communicating with the storage space, the opening has a width smaller than the maximum width of the interior of the groove; The suspension wire is Support line and a covering portion that covers the support wire, the groove is formed in the covering portion such that the opening opens into the accommodation space, the conduit includes a plurality of the hangers arranged at intervals along the axial direction of the suspension wire; Each of the hangers is a conduit having an annular shape that forms a through hole through which the cable is inserted by being connected to the covering portion.

2. 2. The pipeline of claim 1, The hanger is a pipe that is integrally formed with the covering portion.

3. 3. The pipeline according to claim 1 or 2, The groove is a conduit formed continuously over the entire axial direction of the suspension wire.

4. The pipeline according to any one of claims 1 to 3, The pipeline is a pipeline having a plurality of the grooves.

5. A method of laying a cable using a conduit for laying a cable, comprising: a suspension wire; a hanger held by the suspension wire and having a storage space for storing a cable; and a groove extending along the axial direction of the suspension wire, the groove having an opening communicating with the storage space and having a width smaller than the maximum width inside the groove, a first step of connecting the cable to a first end of a wiring member having a thin wire portion and a thick wire portion, the first end being on the thin wire portion side; a second step of inserting the wire-passing member into the groove from a second end portion of the wire-passing member on the thick wire portion side; and a third step of pulling the cable through the wire-pull member while holding the thick wire portion in the groove and positioning the thin wire portion in the accommodation space, thereby inserting the cable into the accommodation space, the thin line portion is narrower than the width of the opening, A cable laying method in which the thick wire portion is wider than the width of the opening and narrower than the maximum width inside the groove.

6. A cable laying method using the conduit according to any one of claims 1 to 4, comprising: a first step of connecting the cable to a first end of a wiring member having a thin wire portion and a thick wire portion, the first end being on the thin wire portion side; a second step of inserting the wire-passing member into the groove from a second end portion of the wire-passing member on the thick wire portion side; and a third step of pulling the cable through the wire-pull member while holding the thick wire portion in the groove and positioning the thin wire portion in the accommodation space, thereby inserting the cable into the accommodation space, the thin line portion is narrower than the width of the opening, A cable laying method in which the thick wire portion is wider than the width of the opening and narrower than the maximum width inside the groove.

7. 7. The cable laying method according to claim 5 or 6, A method of installing a cable, wherein the opening has a width smaller than the width of the cable.

8. A cable laying method according to any one of claims 5 to 7, comprising: A cable laying method in which the thin wire portion and the thick wire portion are composed of mutually independent members.

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