Wire drawing roller mounting device and wire drawing roller mounting method

Abstract

To provide a wire drawing roller mounting tool and a wire drawing roller mounting method that ensure the safety of workers and improve work efficiency by mounting a wire drawing roller from the ground. [Solution] The wire drawing roller mounting device 1 comprises an operating rod 10 for operating a wire drawing roller 30, which can be attached to an attachment object at a high altitude, to attach it to the attachment object, and a connecting part 20 whose tip is detachably connected to the tip of the operating rod 10 and whose base end is detachably connected to the wire drawing roller 30.

Description

[Technical Field]

[0001] The present disclosure relates to a wire drawing roller mounting tool and a wire drawing roller mounting method. [Background technology]

[0002] BACKGROUND ART In an indoor cable extension method, a method is known in which a wire extension roller is attached to a cable installation location such as a cable rack, and then a new cable is pulled onto the wire extension roller.

[0003] Patent Document 1 discloses a cable rack fixing member that can easily fix a cable extension roller device as an extension roller to a main beam of a cable rack in indoor cable extension work. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2019-103375 Summary of the Invention [Problem to be solved by the invention]

[0005] However, since cable installation locations such as cable racks are located at high altitudes, installing a wire-extending roller device such as that described in Patent Document 1 requires the climbing and descending of ladders, which places a burden on workers in terms of their safety and work efficiency.

[0006] The object of the present disclosure is to provide a wire drawing roller installation tool and a wire drawing roller installation method that ensure the safety of workers and improve work efficiency by installing a wire drawing roller from the ground. [Means for solving the problem]

[0007] In order to solve the above problems, a wire drawing roller attachment device according to one aspect of the present disclosure includes: An operating rod for operating the wire drawing roller to be attached to an attachment target at a high place so as to attach the wire drawing roller to the attachment target; a connecting portion whose tip end is detachably connected to the tip end of the operating rod and whose base end is detachably connected to the wire drawing roller; Equipped with. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide a wire drawing roller installation tool and a wire drawing roller installation method that ensure the safety of workers and improve work efficiency by installing a wire drawing roller from the ground. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view showing the configuration of a wire drawing roller attachment device 1 of the present embodiment. [Figure 2] 1 is a front view showing the configuration of a wire drawing roller mounting fixture 1 of the present embodiment. [Figure 3] 1 is a side view showing the configuration of a wire drawing roller mounting fixture 1 of the present embodiment. [Figure 4] FIG. 2 is an enlarged view showing the operating rod 10 of the present embodiment. [Figure 5] FIG. 2 is an enlarged view showing a connection portion 20 of the present embodiment. [Figure 6] 1 is a diagram showing the operation rod 10 and the connection part 20 of the present embodiment connected together. [Figure 7] 1 is a flowchart showing a wire drawing roller installation method using the wire drawing roller installation tool 1 according to the present embodiment. [Figure 8] 1A and 1B are diagrams showing how a cable drawing roller device 30 is attached to a cable rack using a cable drawing roller attachment tool 1 according to the present embodiment. [Figure 9] FIG. 10 is a diagram showing a cable drawing roller device 30 attached to a cable rack. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In all drawings describing the embodiments, common components are designated by the same reference numerals, and repeated description will be omitted. Note that the following embodiments do not unduly limit the content of the present disclosure described in the claims. Furthermore, not all components shown in the embodiments are necessarily essential components of the present disclosure. Furthermore, each drawing is a schematic diagram and is not necessarily a precise illustration.

[0011] In addition, in the following description, when describing elements of the same type without distinguishing between them, reference symbols (or common symbols among the reference symbols) may be used, and when describing elements of the same type with distinction between them, the identification numbers (or reference symbols) of the elements may be used.

[0012] <Overall structure> The cable-drawing roller attachment device of this embodiment is a device that allows a ground-based worker to attach a cable-drawing roller to a cable installation location at a high altitude during the work of extending a new indoor communication cable. The cable-drawing roller has a clamping portion that can be attached to the installation target, and is a roller that can pull in the new communication cable while attached to the cable installation location.

[0013] In the following, the mounting target will be described using a cable rack, which is a cable installation location, as an example. In this embodiment, "high place" is not limited to a place that is 2 meters or more above the ground, but also includes a place that is so high that a worker on the ground cannot reach it even if he or she stretches out his or her hand. In this embodiment, "tip" refers to one end in the longitudinal direction, and "base end" refers to the other end in the longitudinal direction.

[0014] The configuration of the wire drawing roller mounting fixture 1 according to this embodiment will be described. Fig. 1 is a perspective view showing the configuration of the wire drawing roller mounting fixture 1 according to this embodiment. Fig. 2 is a front view showing the configuration of the wire drawing roller mounting fixture 1 according to this embodiment. Fig. 3 is a side view showing the configuration of the wire drawing roller mounting fixture 1 according to this embodiment.

[0015] As shown in Figures 1 to 3, the cable drawing roller attachment device 1 includes an operating rod 10 and a connecting part 20. The cable drawing roller attachment device 1 is connected to a cable drawing roller device 30 and attaches the cable drawing roller device 30 to a cable rack located at an elevated position. The tip of the operating rod 10 is detachably connected to the connecting part 20. The connecting part 20 is disposed between the operating rod 10 and the cable drawing roller device 30 and connects them. Specifically, the tip of the connecting part 20 is detachably connected to the operating rod 10, and the base end is detachably connected to the cable drawing roller device 30.

[0016] <Configuration of the operating rod 10> The operating rod 10 includes a main body 11, a convex portion 12, and a protrusion 13. The operating rod 10 is operated by a ground worker to lift the operating rod 10 toward the cable rack while supporting the cable-drawing roller device 30 and hook it onto the cable rack. The operator then rotates the operating rod 10 in the circumferential direction, thereby clamping the parent girder of the cable rack between the clamping portions 33 of the cable-drawing roller device 30.

[0017] The main body 11 is a rod-shaped member to be held by a worker on the ground, and has a circular cross section that can be carried by the worker. The main body 11 is made of a lightweight material, such as an electrically insulating plastic.

[0018] FIG. 4 is an enlarged view showing the operating rod 10 of this embodiment.

[0019] As shown in Fig. 4, the protrusion 12 is provided at the tip of the main body 11. The cross-sectional shape of the protrusion 12 is, for example, circular, and the diameter of the protrusion 12 is smaller than the inner diameter of the recess 22 of the connecting part 20, so that the protrusion 12 fits within the recess 22. The protrusion 12 is formed of a lightweight material, for example, an electrically insulating plastic. In Fig. 4, the protrusion 12 is provided at the tip of the main body 11 as an integral part of the main body 11, but it may also be attached as a separate part.

[0020] The protrusion 13 is provided on the side surface of the convex portion 12. The base end of the protrusion 13 is rod-shaped and the tip end is spherical. The height of the rod-shaped portion of the protrusion 13 is greater than the height of the groove 23 of the recess 22. Furthermore, the width of the rod-shaped portion of the protrusion 13 is smaller than the width of the groove 23 of the recess 22, and the width of the spherical portion is greater than the width of the groove 23. Therefore, when the protrusion 12 is fitted into the recess 22, the rod-shaped portion of the protrusion 13 can move along the groove 23, and the spherical portion protrudes outside the groove 23 to act as a clamp from the outside. This increases the adhesion between the protrusion 12 and the recess 22, improving the operability of the operating rod 10.

[0021] <Configuration of connection part 20> 1 to 3 again, the connection part 20 includes a main body 21, a recess 22, a groove 23, and a male thread 24. The connection part 20 connects the operating rod 10 and the cable-drawing roller device 30, and also adjusts and fixes the width of the clamping part 33 of the cable-drawing roller device 30. The main body 21 is a rod-shaped member, and its cross-sectional shape is, for example, circular, similar to that of the main body 11 of the operating rod 10.

[0022] The main body 21 is preferably formed of, for example, metal in order to support the weight of the cable extension roller device 30 connected to the upper part thereof, but is not limited to this and may also be formed of an electrically insulating plastic.

[0023] FIG. 5 is an enlarged view showing the connection portion 20 of this embodiment.

[0024] 5, recess 22 is provided so as to have an opening at the tip of main body 21. The cross-sectional shape of recess 22 is, for example, circular, and the inner diameter of recess 22 is larger than the diameter of protrusion 12 of operating rod 10, so that protrusion 12 fits within recess 22.

[0025] Groove 23 is provided on the side surface of recess 22. Groove 23 is L-shaped and has an opening at the tip of main body 21. In other words, groove 23 has a first portion extending in the longitudinal direction from the tip of main body 21, and a second portion connecting to an end of the first portion on the opposite side of main body 21 from the tip side and extending in the short direction (circumferential direction). The width of groove 23 is larger than the width of the rod-shaped portion of protrusion 13, and the height of groove 23 (the difference between the outer diameter and inner diameter of main body 21) is smaller than the height of the rod-shaped portion of protrusion 13.

[0026] FIG. 6 is a diagram showing the operation rod 10 and the connection part 20 of this embodiment connected together.

[0027] 6, when the operating rod 10 is connected to the connecting part 20, when the convex part 12 of the operating rod 10 is fitted into the concave part 22 of the connecting part 20, the protrusion 13 enters along the first part from the opening of the groove 23 and reaches the end of the first part. Then, the operating rod 10 is rotated in the circumferential direction, and the protrusion 13 enters along the second part, thereby connecting the operating rod 10 and the connecting part 20.

[0028] 5 again, the male thread 24 is provided at the base end of the main body 21 so as to extend in the longitudinal direction. The male thread 24 is preferably made of, for example, metal, like the main body 21, in order to support the weight of the cable drawing roller device 30 connected to the upper part of the male thread 24. The male thread 24 is connected to the main body 21 by welding.

[0029] The male thread 24 fits into the female thread 36 of the cable-drawing roller device 30. The connection portion 20 and the cable-drawing roller device 30 are connected by tightening the male thread 24 relative to the female thread 36. Furthermore, the width of the clamping portion 33 of the cable-drawing roller device 30 is adjusted by tightening the male thread 24. To ensure a range of motion for the clamping portion 33, it is preferable that the male thread 24 be long in the longitudinal direction, for example, about 70 mm.

[0030] <Configuration of cable extension roller device 30> 1 to 3, the cable-drawing roller device 30 includes a main body 31, a roller unit 32, and a clamping unit 33. The cable-drawing roller device 30 is primarily used for drawing new communication cables in a cable rack. By using the cable-drawing roller device 30, it is possible to store the lowered cable under the roller unit 32 after laying.

[0031] The main body 31 is the main body of the cable extension roller device 30, and is a rod-shaped metal piece with a C-shaped cross section. The main body 31 is attached to the main beam of the cable rack by a clamping part 33 provided at the tip thereof, and supports the roller part 32 on the base end side of the clamping part 33.

[0032] The roller portion 32 includes a shaft 32a and a plurality of rollers 32b. The roller portion 32 is provided on the base end side of the clamping portion 33 of the main body 31.

[0033] The shaft 32a is a J-shaped metal piece. The shaft 32a has a curved portion (semicircular portion) at the bottom, a long shaft portion at one end of the curved portion, and a short shaft portion at the other end. The long shaft portion of the shaft 32a is movably supported along the C-shaped opening of the main body 31, its height adjusted to match the cable rack, and fixed to the main body 31 with a mounting bolt. The long shaft portion of the shaft 32a is formed by a shaft (bolt) extending in the longitudinal direction and a nut into which the shaft fits, and is fitted inside the socket. This allows the long shaft portion to rotate circumferentially within the socket at 30-degree intervals, making it possible to adjust the angles of the curved portion and the short shaft portion relative to the shaft 32a.

[0034] The rollers 32b are provided on the curved portion and short shaft portion of the shaft 32a. The shaft 32a is inserted into the rollers 32b, and the rollers 32b are attached so as to be rotatable in the circumferential direction of the shaft 32a. During cable extension work, a new communication cable is placed on the rollers 32b, and the roller portions 32b act as guide surfaces, and the rotation of the rollers 32b pulls in the new communication cable.

[0035] The clamping portion 33 includes a protective member 34, an upper clamping portion 35a, a lower clamping portion 35b, and an internal thread 36. The clamping portion 33 is provided at the tip of the main body 31. The clamping portion 33 forms a space S with the protective member 34, the upper clamping portion 35a, and the lower clamping portion 35b on the C-shaped opening side of the main body 31, and clamps the main girder of the cable rack.

[0036] The protective member 34 is attached along the C-shaped opening of the main body 31. The protective member 34 is formed from a resin or the like, and when the main beam of the cable rack is clamped between the upper clamping portion 35a and the lower clamping portion 35b, the protective member 34 is positioned between the main body 31 and the main beam of the cable rack, thereby preventing the cable rack from being damaged.

[0037] The upper clamping portion 35a is provided above the clamping portion 33. The upper clamping portion 35a has an L-shaped cross section so as to clamp the parent girder of the cable rack from above on the C-shaped opening side of the main body 31. The upper clamping portion 35a can also be hooked from the top side of the parent girder of the cable rack before clamping it. The upper clamping portion 35a has a high nut (not shown) welded to its top surface, and is fixed by fitting a bolt that passes through the main body 31 and the protective member 34 into the high nut. The fixed position of the upper clamping portion 35a can be adjusted according to the insertion position of the bolt.

[0038] The lower clamping portion 35b is provided below the clamping portion 33. The lower clamping portion 35b clamps the main girder of the cable rack from below on the C-shaped opening side of the main body 31, and has a U-shaped cross section so as to cover the tip of the main body 31. The lower clamping portion 35b is fixed by the male thread 24 of the connection portion 20, which penetrates the lower clamping portion 35b from its underside and fits into the female thread 36. The position of the lower clamping portion 35b can be adjusted by the degree of tightening of the male thread 24, and the width of the space S in which the main girder of the cable rack is clamped can be adjusted.

[0039] The female thread 36 is provided on the upper part of the lower clamping portion 35b at the tip of the main body 31. The female thread 36 is a high nut welded to the inside of the main body 31. The male thread 24 of the connection means 20 is fitted into the female thread 36.

[0040] <How to install the wire extension roller> A method for installing a cable extension roller using the cable extension roller installation tool 1 according to this embodiment will now be described. Fig. 7 is a flowchart showing the method for installing a cable extension roller using the cable extension roller installation tool 1 according to this embodiment. Fig. 8 is a diagram showing the installation of a cable extension roller device 30 on a cable rack using the cable extension roller installation tool 1 according to this embodiment, and Fig. 9 is a diagram showing the cable extension roller device 30 installed on the cable rack.

[0041] First, as shown in Fig. 7, a pilot wire for pulling a new communication cable is set in the cable-drawing roller device 30 (step S11). The pilot wire is connected to the new communication cable and is used to pull the new communication cable and place it on the roller unit 32 of the cable-drawing roller device 30. The reason why the new communication cable is not placed on the roller unit 32 from the beginning is that the new communication cable is heavy, and if it is placed on the roller unit 32, it will be difficult to lift the cable-drawing roller device 30.

[0042] Next, the cable drawing roller device 30 is connected to the cable drawing roller attachment fixture 1 (step S12). Specifically, the male thread 24 of the connection part 20 is fitted into the female thread 36 of the cable drawing roller device 30. At this time, the male thread 24 is loosely fastened so that the width of the clamping part 33 can be adjusted later.

[0043] Thereafter, the convex portion 12 of the operating rod 10 is fitted into the concave portion 22 of the connecting part 20. Specifically, the protrusion 13 enters along the first portion from the opening of the groove 23 and reaches the end of the first portion. Then, the operating rod 10 is rotated in the circumferential direction so that the protrusion 13 enters along the second portion, thereby connecting the operating rod 10 and the connecting part 20.

[0044] Next, the cable-drawing roller device 30 is attached to the cable rack (step S13). Specifically, as shown in FIGS. 8 and 9, the operating rod 10 of the cable-drawing roller mounting fixture 1 to which the cable-drawing roller device 30 is connected is lifted to attach the clamping portion 33 to the cable rack. At this time, the upper clamping portion 33a is hooked onto the upper surface of the parent girder of the cable rack. Then, by rotating the operating rod 10 in the circumferential direction, the male thread 24 of the connection portion 20 is tightened, adjusting the position of the lower clamping portion 33b, and the parent girder of the cable rack is clamped. When the operating rod 10 is rotated in the circumferential direction, the protrusion 13 of the operating rod 10 rotates only along the second portion of the groove 23 of the connection portion 20 and stops at the end of the second portion. This stops the rotation of the operating rod 10 and the connection portion 20, and the male thread 24 of the connection portion 20 can be rotated relative to the female thread 36 of the cable-drawing roller device 30 to tighten it.

[0045] Next, the operating rod 10 is removed from the connection part 20 (step S14). Specifically, the operating rod 10 is rotated circumferentially along the second part of the groove 23 and pulled downward along the first part of the groove 23, whereby the convex part 12 of the operating rod 10 fitted into the concave part 22 of the connection part 20 is removed.

[0046] Next, if the installation of all the cable-drawing roller devices 30 has not been completed (NO in step S15), the process returns to step S11 and the same operation is performed. On the other hand, if the installation of all the cable-drawing roller devices 30 has been completed (YES in step S15), the wire-drawing roller installation operation is completed, and then the new communication cable is connected to the pilot wire and pulled.

[0047] <Summary> As described above, the cable drawing roller attachment device 1 in this embodiment has the operating rod 10 and the connecting part 20, and the operating rod 10 and the cable drawing roller device 30 are connected via the connecting part 20. This allows a worker on the ground to easily attach the cable drawing roller device 30 to a cable rack located at a high place by operating the operating rod 10. This eliminates the need for climbing up and down ladders or working at height, ensuring the safety of the worker while improving work efficiency. Furthermore, the cable drawing work itself can be done by one person, which also contributes to reducing the amount of labor required.

[0048] In this embodiment, the connection between the connection part 20 and the operating rod 10 is made by the recessed part 22 and the protruding part 12, and the connection between the connection part 20 and the cable drawing roller device 30 is made by the male thread 24 and the female thread 36, so that the connection methods are different. This makes it possible to perform the connection and removal work without interfering with each other.

[0049] Furthermore, in the cable drawing roller mounting device 1 of this embodiment, the operating rod 10 and the connecting part 20 are separate, and when the cable drawing roller device 30 is attached to the cable rack, only the connecting part 20 is connected to the cable drawing roller device 30. Therefore, a single operating rod 10 can be used to attach multiple cable drawing roller devices 30 to the cable rack, making it easy to transport the device to the work site.

[0050] (Variation) In the above embodiment, the main body 11 of the operating rod 10 is formed from a single rod-shaped member, but the present invention is not limited to this. For example, the main body 11 may be configured to be extendable in the longitudinal direction, and a handle that can be held by the operator may be provided at the base end of the main body 11. This makes it easier to work according to the height of the cable rack, and further reduces the burden on the operator.

[0051] In the above embodiment, the operating rod 10 and the connection part 20 are connected by the convex part 12 and the concave part 22, but the present invention is not limited to this, and any connection may be used as long as it is detachable and can be connected and detached without interfering with the connection between the connection part 20 and the cable drawing roller device 30. For example, a configuration in which hooks or the like provided on the tip of the operating rod 10 and the tip of the connection part 20 are hooked on each other may be used.

[0052] In the above embodiment, the groove 23 of the connection part 20 is configured in an L-shape, but this is not limiting. For example, the groove 23 may be T-shaped. This allows the protrusion 13 to be hooked onto the second part of the groove 23 when tightening or loosening the male screw 24, and prevents the operating rod 10 from slipping out of the connection part 20.

[0053] In the above embodiment, the roller unit 32 is supported so as to be movable along the C-shaped opening of the main body 31, but this is not limiting. The roller unit 32 may be supported on the opposite side of the C-shaped opening of the main body 31. This means that when the cable extension roller device 30 is attached to the main girder of the cable rack, the roller unit 32 is positioned on the opposite side of the main girder, making it possible to more freely change the cable installation location when pulling in the cable.

[0054] In the above embodiment, the cable-drawing roller device 30 has its roller unit 32 composed of a J-shaped shaft 32a and multiple rollers 32b, but this is not limited to this. For example, the cable-drawing roller device 30 may be any device that can be attached to a cable rack by fitting the male thread 24 of the connection unit 20, and the roller unit 32 may be composed of a single pulley or the like.

[0055] In the above embodiment, the pilot wire is set in step S11 as a method for attaching the cable-drawing roller, but this is not limited to this. For example, the pilot wire may be set after the installation of all cable-drawing roller devices 30 is completed (after step S15). Also, in step S11, a new communication cable may be set from the beginning, instead of a pilot wire.

[0056] In the above embodiment, the cable-drawing roller device 30 is attached to the main girder of the cable rack, but the present invention is not limited to this. The object to which the cable-drawing roller device 30 is attached may be anything that can be fixed by the clamping portion 33, such as an attachment or support of the cable rack.

[0057] In the above embodiment, the object of the wire-extension work is an indoor communication cable, but the present invention is not limited to this. For example, the object of the wire-extension work may be an electric wire, which is an example of a cable.

[0058] Although several embodiments of the present disclosure have been described above, these embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and modifications are intended to be included in the scope of the inventions and their equivalents as defined in the claims, as well as in the scope and spirit of the inventions.

[0059] <Additional Notes> The matters described in the above embodiments will be supplemented below.

[0060] (Appendix 1) an operating rod for operating a wire drawing roller that can be attached to an attachment target at a high place so as to attach the wire drawing roller to the attachment target; a connecting portion whose tip end is detachably connected to the tip end of the operating rod and whose base end is detachably connected to the wire drawing roller; A wire drawing roller mounting device comprising:

[0061] (Appendix 2) A recess is provided at the tip of the connection portion, The tip of the operating rod is provided with a protrusion that fits into the recess of the connecting portion. The wire drawing roller mounting fixture according to claim 1.

[0062] (Appendix 3) An L-shaped groove is provided on the side surface of the recess of the connection portion, A protrusion that is movable along and connectable to the groove is provided on the side surface of the convex portion of the operating rod. The wire drawing roller mounting fixture according to claim 2.

[0063] (Appendix 4) The base end of the connecting portion is provided with a male screw that fits into a female screw provided on the wire drawing roller. 4. The wire drawing roller mounting fixture according to claim 1.

[0064] (Appendix 5) The width of the clamping portion of the wire drawing roller is adjusted by tightening the male screw of the connecting portion. 5. The wire drawing roller mounting fixture according to claim 4.

[0065] (Appendix 6) the mounting object is a cable rack, By tightening the male screw of the connecting portion, the width of the clamping portion of the wire drawing roller is adjusted to the width of the main beam of the cable rack. The wire drawing roller mounting fixture according to claim 5.

[0066] (Appendix 7) A wire drawing roller mounting method using the wire drawing roller mounting tool according to any one of claims 1 to 3, connecting the wire drawing roller to the wire drawing roller attachment; Attaching the wire drawing roller to the attachment target; A method for attaching a wire extension roller, comprising: [Explanation of symbols]

[0067] 1. Wire extension roller mounting device 10...operation rod 11. Main unit 12. Convex part 13...Protrusion 20 Connection 21. Main unit 22. Recess 23...Groove 24···Male thread 30 Cable extension roller device 31 Main unit 32 Roller part 32a...axis 32b...Laura 33 Clamping part 34 Protective member 35a···Upper clamping part 35b Lower clamping part 36 Female thread S...Space

Claims

1. an operating rod for operating a wire drawing roller that can be attached to an attachment target at a high place so as to attach the wire drawing roller to the attachment target; a connecting portion whose tip end is detachably connected to the tip end of the operating rod and whose base end is detachably connected to the wire drawing roller; A wire drawing roller mounting device comprising:

2. A recess is provided at the tip of the connection portion, The tip of the operating rod is provided with a protrusion that fits into the recess of the connecting portion. The wire drawing roller mounting fixture according to claim 1.

3. An L-shaped groove is provided on a side surface of the recess of the connection portion, A protrusion that is movable along and connectable to the groove is provided on the side surface of the convex portion of the operating rod. The wire drawing roller mounting fixture according to claim 2.

4. The base end of the connecting portion is provided with a male screw that fits into a female screw provided on the wire drawing roller. The wire drawing roller mounting fixture according to any one of claims 1 to 3.

5. The width of the clamping portion of the wire drawing roller is adjusted by tightening the male screw of the connecting portion. The wire drawing roller mounting fixture according to claim 4.

6. the mounting object is a cable rack, By tightening the male screw of the connecting portion, the width of the clamping portion of the wire drawing roller is adjusted to the width of the main beam of the cable rack. The wire drawing roller mounting fixture according to claim 5.

7. an operating rod for operating a wire drawing roller that can be attached to an attachment target at a high place so as to attach the wire drawing roller to the attachment target; a connecting portion whose tip end is detachably connected to the tip end of the operating rod and whose base end is detachably connected to the wire drawing roller; A wire drawing roller mounting method using a wire drawing roller mounting tool comprising: connecting the wire drawing roller to a base end of the connection portion of the wire drawing roller attachment device; connecting a tip of the connecting portion to a tip of the operating rod of the wire drawing roller attaching device; operating the operating rod to attach the wire drawing roller to the attachment target; A method for attaching a wire extension roller, comprising:

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