JP2005137097A - Device and method for installing cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for installing an electric cable. <P>SOLUTION: This structure has a fixed structure and a rotatable structure which is attached rotatably to the top of the fixed structure. A fixed structure electric apparatus installed on the above fixed structure and a rotatable structure electric apparatus installed on the above rotatable structure are connected with each other by an electric cable. This has a supporting wire means whose top is fixed to the above rotating structure and whose bottom is attached to the above fixed structure, and an electric cable retaining means which retains the above electric cable, being supported rotatably with the supporting wire means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cable installation apparatus and method, and more particularly to a cable installation apparatus and method in a wind turbine generator.

A wind power generator is known as a power generation system in consideration of environmental problems. This wind power generator generally has a tower and a nacelle rotatably attached to the tower at the top of the tower, and the windmill is attached to the nacelle.
The nacelle is also equipped with a generator operated by a windmill, a motor for rotating the nacelle, a hydraulic device, other electrical equipment, and a control device for these. The device is electrically connected from the nacelle through the inside of the tower to various devices such as a control device installed in the lower portion of the tower by an electric cable.
By the way, the nacelle changes its direction according to the wind direction received by the windmill (wings), that is, the nacelle rotates with respect to the tower. Therefore, the electric cable extending in the nacelle and the tower is twisted as the nacelle rotates. It will be.

However, such twisting of the electric cable shortens the entire length of the electric cable. This is easy, for example, when imagining that even an electric cable that extends over 1 m in a straight state would be less than 1 m when twisted to an extreme spiral. Will be understood. Therefore, when the electric cable is twisted by the rotation of the nacelle, the electric cable is pulled up, and when the nacelle is rotated so as to be untwisted, it is pulled down according to the rotation of the nacelle.
Of course, forcible pulling of the electric cable due to such twisting causes damage to the electric cable, so measures must be taken to avoid this. In particular, avoiding damage to an electric cable having a high voltage flowing along with the increase in the size of a wind power generator today is an extremely important issue.

  If only the damage to the electric cable due to the rotation of the nacelle is to be avoided, the electric cable may simply be hung from the nacelle to the lower part of the tower (without supporting the electric cable inside the tower on the way). However, in this case, the electric cable is subjected to the load of the entire weight of the electric cable near the boundary between the nacelle and the tower, and the electric cable may be damaged. With the increase in the size of wind power generators, it is not practical to take this method because the electrical cable can break in the present day when it is not uncommon for the total length of the electrical cable to exceed 50 m.

On the other hand, a method shown in FIG. 1 is also known as a technique for avoiding damage to the electric cable accompanying the rotation of the nacelle.
For ease of understanding, first, the overall structure of the wind turbine generator shown in FIG. 1 will be briefly described. The wind turbine generator generally designated by reference numeral 1 includes a tower 2 and the tower. 2 has a nacelle 3 rotatably attached to the tower 2, and a windmill 4 is attached to the nacelle 3.
A cable wiring rack 5 is attached to the lower center of the nacelle 3, and the cable wiring rack 5 projects into the tower 2. The nacelle 3 is provided with an electrical device such as a generator already described (hereinafter referred to as “nacelle electrical device”) 6, and an electric cable EC connected to the nacelle electrical device 6 is connected to the nacelle 3 from the nacelle 3. It is led to the inside of the tower 2 through the wiring rack 5 and extends to various electrical equipments 7 (hereinafter referred to as “tower electrical equipment” for convenience of explanation) 7 installed under the tower 2 and connected thereto. ing.

In this wind turbine generator 1, in order to avoid damage to the electric cable EC due to the rotation of the nacelle 3, the electric cable EC extending from the cable wiring rack 5 into the tower 2 is provided in any length L 1 or in the tower. It hangs down freely without being fixed, and then is lifted upward by a certain length L2 and supported by a support member 8 fixed to the tower. The electric cable EC supported by the support member 8 is then held by a plurality of trays 9 fixed to the tower 2 along the tower 2 and spaced apart from each other below the support member 8, while the tower electrical device 7. To and connected to this.
In this structure of the wind turbine generator 1, even when the nacelle 3 is rotated with respect to the tower 2 and the electric cable EC is pulled upward, for example, the pulled length is within the range of the length L2. Then, no tensile load is applied to the electric cable EC extending from the support member 8 to the tower electric device 7, and damage to the electric cable EC can be avoided.

Accordingly, the longer the length L2, the better from the viewpoint of avoiding damage to the electric cable EC. However, the longer the length L2, the longer the length L1 of the electric cable EC from the cable wiring rack 5 to the support member 8, Since the length of L2 is also increased, and the load applied to the electric cable EC held by the cable wiring rack 5 is increased accordingly, the lengths L1 and L2 are within the load limit of the electric cable EC. There is a disadvantage that must be determined.
Further, in the manner of installing the electric cable EC in the wind power generator 1, it is necessary to attach the electric cable EC from the support member 8 to the tower electrical device 7 to the plurality of trays 9 fixed to the tower 2.

However, as described above, there are some towers whose total height exceeds 50 m, and in such a wind power generator, there is a problem that such an installation work places a heavy burden on the operator.
Accordingly, the present invention has been invented to solve the above-described problems, and can reduce the twist of the electric cable and can easily and safely install the electric cable. It is another object of the present invention to provide a structure capable of reducing twisting of an electric cable.

In order to achieve the above object, a first invention of the present invention includes a fixed structure and a rotating structure that is rotatably attached to an upper portion of the fixed structure, and is fixed to the fixed structure. A structure electrical apparatus and a rotating structure electrical apparatus installed in the rotating structure are connected by an electric cable, and an upper end is attached to the rotating structure, and a lower end is the fixed structure. Support wire means attached to the wire, and an electric cable holding member that is rotatably supported by the support wire means and holds the electric cable.
In the present invention, the electric cable holding member has a guide sleeve through which the support wire means passes, and the guide sleeve is attached to the support wire means so that the guide sleeve is supported by the support wire means. It is preferable to include a holding plate that includes an engaging lid member and extends outward from the guide sleeve, and an electric cable clamp member that is attached to the holding plate and holds the electric cable.

In the first invention, the electric cable holding member includes at least a pair of the holding plates extending radially outward from the guide sleeve, and an annular frame connecting the outer ends of the holding plates. Is preferred.
Further, in the first invention, a floor for vertically dividing the structure is provided in the structure between the fixed structure electric device and the rotary structure electric device, and the electric cable is provided on the floor. And an insertion hole extending through the support wire means, and the electric cable holding member has a guide roller on the outer surface of the annular frame that can rotate about an axis extending substantially parallel to the support wire means. And it is preferable that the said electric cable holding member provided with the said guide roller is arrange | positioned at the said insertion hole so that the said guide roller may face the inner end surface of the said floor which comprises the said insertion hole.

In order to achieve the above object, a second invention of the present invention includes a fixed structure and a rotating structure that is rotatably attached to an upper portion of the fixed structure, and is fixed to the fixed structure. An electrical cable installation device for installing the electrical cable in a structure in which a structural electrical apparatus and a rotary structural electrical apparatus installed in the rotary structure are connected by an electrical cable, the rotary structural body And an electric cable holding member for holding the electric cable. The electric cable holding member includes an electric cable holding member for holding the electric cable. A guide sleeve passing therethrough, the guide sleeve comprising a lid member engaged with the support wire means such that the guide sleeve is supported by the support wire means; A holding plate extending towards, attached to the holding plate, and an electrical cable clamp member for holding the electrical cable, it is characterized.
In this second invention, the electric cable holding member has at least a pair of the holding plates that extend diametrically outward from the guide sleeve, and an annular frame that connects the outer ends of these holding plates. preferable.
In the second invention, it is preferable that the electric cable holding member has a guide roller on an outer surface of the annular frame that can rotate around an axis extending substantially parallel to the electric cable.

In order to achieve the above object, a third invention of the present invention includes a fixed structure and a rotating structure that is rotatably attached to an upper portion of the fixed structure, and is fixed to the fixed structure. An electrical cable installation method in which the electrical cable is installed in a structure in which a structure electrical apparatus and a rotary structure electrical apparatus installed in the rotary structure are connected by an electrical cable, the support wire means supporting members An electrical cable holding member rotatably mounted on a support member of the support wire means, the electrical cable holding member having a guide sleeve through which the support wire means passes, the guide sleeve comprising: A lid member that engages with the support member is provided so that the guide sleeve is supported by the support wire means, and a holding plate extends outwardly from the guide sleeve. Holding the electrical cable at a rate, lifting the upper end of the support wire means to the rotating structure and fixing it to the rotating structure, and attaching the lower end of the support wire means to the fixed structure It is characterized by including.
According to a third aspect of the present invention, the method includes: interposing a spacer between the support member of the support wire means and the lid member of the guide sleeve after holding the electric cable on the holding plate. preferable.

  In the structure according to the first aspect of the present invention, when the rotating structure is rotated with respect to the fixed structure, the electric cable holding member, and thus the electric cable held by the rotating structure is rotated around the support wire means. As it is rotated, the twist applied to the electrical cable due to the rotation of the rotating structure will be distributed over the entire length of the electrical cable, reducing the degree of twist applied to the electrical cable per unit length Can be made. Further, since the electric cable holding member is supported by the support wire means and the electric cable is supported by the electric cable holding member, the load applied to the electric cable near the upper end portion thereof is reduced by the weight of the electric cable. When two or more electric cable holding members are provided, the load applied to the electric cable can be further reduced by the electric cable holding member provided at the uppermost part.

  In the electric cable installation device according to the second aspect of the present invention, when the rotary structure is rotated with respect to the fixed structure, the electric cable holding member, and thus the electric cable held thereby, supports the support wire means. The twist applied to the electrical cable due to the rotation of the rotating structure will be distributed over the entire length of the electrical cable, so that the degree of twist applied to the electrical cable per unit length. Can be reduced. Further, since the electric cable holding member is supported by the support wire means and the electric cable is supported by the electric cable holding member, the load applied to the electric cable near the upper end portion thereof is reduced by the weight of the electric cable. When two or more electric cable holding members are provided, the load applied to the electric cable can be further reduced by the electric cable holding member provided at the uppermost part.

  In the electric cable installation method according to the third aspect of the present invention, since it is possible to eliminate the work of attaching the electric cable directly to the fixed structure, it is possible to reduce the burden on the operator regarding the installation of the electric cable, and the rotating structure Even when installed in high places, work at high places can be reduced.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In this embodiment, the present invention is applied to a wind turbine generator.

Referring to FIG. 2, a wind turbine generator according to the present invention is indicated generally by the reference numeral 10. The wind power generator 10 includes a tower 12 and a nacelle 13 that is rotatably attached to the tower 12 at an upper portion of the tower 12, and a windmill 14 is attached to the nacelle 13.
A cable wiring rack 15 is attached to the lower center of the nacelle 13, and the cable wiring rack 15 projects into the tower 12. The nacelle 13 is provided with a nacelle electrical device 16, and the electric cable EC connected to the nacelle electrical device 16 is led from the nacelle 3 through the cable wiring rack 15 into the tower 12 and installed at the lower part of the tower 12. It extends to the tower electrical equipment 17 and is connected thereto.
In the tower 12, several floors F that are vertically spaced from each other are provided, and through holes FH are formed in these floors F. The electric cable EC described above has the insertion holes FH. Extending through.

The upper end portion of the support wire 20 is attached to the lower portion of the nacelle 13, in this embodiment, the lower portion of the cable wiring rack 15, the support wire 20 extends through the insertion hole FH of the floor F, and the lower end portion of the support wire 20 is The lower part of the tower 12, in this embodiment, is attached to the tower electrical equipment 17 installed in the lower part of the tower 12. The support wire 20 is preferably positioned on the rotation axis of the nacelle 13.
Around the support wire 20, support members 21 shown in FIG. 3 are attached at intervals along the longitudinal direction of the support wire 20. In this embodiment, the support members 21 are attached at substantially equal intervals.
The electric cable holding member 30 shown in FIGS. 3 to 5 is supported by the support member 21 of the support wire 20.

  As can be clearly seen in FIG. 4, the electric cable holding member 30 has an annular frame 31, and an electric cable holding plate 32 extends inside the annular frame 31. In this embodiment, four holding plates 32 extend at an equal distance from the annular frame 31 so as to be orthogonal to each other, and a guide sleeve 33 (see FIG. Reference) is provided. A lid member 34 is provided at the top of the guide sleeve 33, and a hole having a diameter larger than the diameter of the support wire 20 and smaller than the diameter of the support member 21 is provided in the lid member 34. Therefore, when the support wire 20 is passed through the hole provided in the lid member 34 of the guide sleeve 33 of the electric cable holding member 30, the lid member 34 is supported by the support member 21 of the support wire 20, and thus the electric cable holding The member 30 is supported by the support member 21 of the support wire 20.

An electric cable clamp member 40 is attached to the holding plate 32. As can be clearly seen in FIG. 4, the electric cable clamping member 40 has a base portion 40A in which a bolt hole (not shown) is formed, and a first half portion integrally formed with the base portion 40A. A semicircular arc portion 40B is formed in the first half portion, and flanges 40C in which bolt holes (not shown) are formed are provided at both outer ends of the semicircular arc portion 40B. The electric cable clamp member 40 also has a second half, and a semicircular arc portion 40D is also formed in the second half, and bolt holes (not shown) are formed at both outer ends of the semicircular arc portion 40D. ) Is formed.
The attachment of the electric cable clamp member 40 to the holding plate 32 can be seen in part in the attachment hole 32A formed in the holding plate 32, and a bolt hole (in the base portion 40A of the electric cable clamp member 40 (see FIG. 3). (Not shown) are aligned, and bolts B1 are passed through these holes and tightened with nuts N1.

Next, the electric cable EC to be held is arranged in the semicircular arc portion 40B of the electric cable clamp member 40, and the bolt hole (not shown) of the flange 40E of the second half is replaced with the bolt hole of the flange 40C of the first half ( And the semicircular arc portion 40B and the semicircular arc portion 40D surround the electric cable EC, and the bolt B2 is passed through the bolt holes (not shown) of the aligned flanges 40C and 40E, and the nut N2 The electric cable EC is held by the holding plates 32 by tightening with.
In this embodiment, although the electric cable clamp member 40 is used to hold the electric cable EC with the holding plate 32, various methods can be adopted, for example, using a member generally called a tie wrap. The electric cable EC may be held on the holding plate 32. The tie wrap is composed of a resin band member and an annular member formed at one end of the member. On the surface of the belt-like member, protrusions having a substantially right-angled triangle are continuously formed along the longitudinal direction, and the triangular cross-section of each protrusion is inclined in a direction away from the annular member. An annular member is provided in the surface of a strip | belt-shaped member, and is provided with the tongue part extended below from the upper part of an annular member. When such a tie wrap is used, with the electric cable EC pressed against the holding plate 32, the tip of the tie wrap without the annular member is passed through the mounting hole 32A and the circumference of the electric cable EC is turned. After passing through another mounting hole 32A, it is inserted into the annular member of the tie wrap. As the distal end portion of the belt-shaped member moves away from the annular member through the annular member, the electric cable EC can be firmly held on the holding plate 32. The protrusion having a triangular cross-section formed on the band-shaped member that has once passed through the annular member cannot be retracted by the tongue of the annular member.

Each electric cable holding member 30 also has at least one guide roller 35 provided on the outer surface of the annular frame 31, in this embodiment, four guide rollers 35, and each guide roller 35 includes the electric cable holding member 30. When attached to a support wire 20 that extends within the tower 12, the support wire 20 can rotate about an axis that extends substantially parallel to the support wire 20.
As can be clearly seen in FIG. 2, the electric cable holding member 30 having the above-described structure is disposed in the insertion holes FH of all the floors F except the floor F closest to the cable wiring rack 15 of the nacelle 13. 20 is supported.
An electric cable holding member 30A having a structure in which the guide roller 35 is removed from the electric cable holding member 30 having the above-described structure is also supported by the support wire 20 in the same manner as in the electric cable holding member 30. The electric cable holding member 30 </ b> A and the electric cable holding member 30 are arranged on the support wire 20 at a substantially equal interval in this embodiment, with a space therebetween.

In the wind power generator 10 having the above-described structure, even when the nacelle 13 rotates with respect to the tower 12, the electric wire attached to the support wire 20 and the electric cable holding member 30 together with the nacelle 13. The cable EC will also rotate.
Since the lower part of the electric cable EC is fixed at the lower part of the water 12, the entire electric cable EC or the entire length of the electric cable EC is twisted by the rotation of the nacelle 13. On the other hand, Since the twist can be absorbed, the degree of twist applied to the electric cable EC can be made extremely small when compared with the case of the wind power generator 1 described in FIG. That is, in the wind power generator 1, when the nacelle 3 rotates, the electric cable EC is twisted in the length from the nacelle electrical device 6 to the tray 9. The degree of twist applied to the electrical cable EC per unit length is only twisted to the electrical cable EC over the entire length of the electrical cable EC, which is much longer than the length from the nacelle electrical device 6 to the tray 9 Can be greatly reduced.

Next, how to install the electric cable EC in the wind power generator 10 will be described.
First, the support member 21 is attached to the support wire 20. The number and position of the support members 21 to be attached are determined according to the number and position of the electric cable holding members 30 to be supported. However, it is not always necessary to attach the support member 21 to the support wire 20 at the site where the wind power generator 10 is constructed, and the support member 21 may be attached to the support wire 20 in advance in a factory or the like. In this case, for example, the support member 21 may be attached to the support wire 20 at equal intervals, or the support member 21 may be attached to the support wire 20 according to a predetermined design.
Next, the electric cable holding member 30 is attached to the support member 21 (all or only some of the necessary members) of the support wire 20.
In this attachment, it is preferable that the electric cable holding member 30 is composed of parts described below.

That is, in this embodiment, as shown in FIGS. 3 and 5, the electric cable holding member 30 includes a first sleeve half 33 </ b> A obtained by dividing the guide sleeve 33 into two equal parts in the vertical direction, and a second sleeve half 33 </ b> B. Have A pair of holding plates 32A and 32B extend perpendicularly to each other at each sleeve half, and a guide roller support frame 31A constituting a part of the annular frame 31 is attached to the tips of the holding plates 32A and 32B. ing.
The first sleeve half portion 33A is also formed with a pair of mounting plates 33C extending radially outwardly above the holding plates 32A and 32B, and the top portion of the first sleeve half 33A is divided into two equal parts in the vertical direction. One lid half 34A is formed. The second sleeve half 33B is also formed with the same mounting plate 33C and second lid half 34B as in the first sleeve half 33A. Bolt mounting holes are formed in each end portion of the mounting plate 33C.

  To attach the cable holding member 30 to the support member 21 of the support wire 20, first, the first sleeve half 33A and the second sleeve half 33B are aligned so as to surround the support wire 20 above the support member 21, These mounting plates 33C are coupled together through bolts and nuts. Prior to or after the operation, the guide roller support frame 31A of the holding plate 32A of each half of the sleeve and the guide roller support frame 31A of the holding plate 32B constitute a part of the annular frame 31. The guide roller 35 is connected to each guide roller support frame 31A via a bolt and a nut.

Subsequently, the required number of electric cable clamp members 40 are attached to the holding plate 32 and the electric cable EC is attached to the electric cable clamp member 40 in the manner already described. Prior to or after this operation, the guide roller support frame 31A attached to the first sleeve half 33A and the guide roller support frame 31A attached to the second sleeve half 33B adjacent thereto are attached. Are connected by a connecting frame 31B through bolts and nuts.
Thereafter, the same operation is repeated to attach the electric cable EC having a required length to the support wire 20.
Thereafter, the tip of the support wire 20 is attached to a pull wire extending from the winch attached to the nacelle 13 or the cable wiring rack 15, the winch is driven to pull up the support wire 20, and the tip of the electric cable EC is connected to the nacelle electric device 16. And the distal end, ie, the upper end, of the support wire 20 is removed from the pull wire of the winch and secured to the nacelle 13 or to the lower portion of the cable wiring rack 15 as in this embodiment. Finally, the lower end of the support wire 20 is attached to the tower electrical device 17 in this embodiment, as already described.

According to the installation method of the electric cable EC to the wind power generator 10 described above, the work required for the wind power generator 1 described in the prior art, particularly, to hold the electric cable EC at a distance from the tower. It is possible to eliminate work at high places, such as work for installing the trays 9 and work for attaching the electric cables EC to these trays 9.
In addition, after clamping the electric cable EC with a certain electric cable clamp member 40 and before clamping with the next electric cable clamp member 40 below, as shown in FIG. 3, the support member 21 of the support wire 20, It is preferable to interpose a spacer 50 between the cable holding member 30 or the lid member 34 of 30A. By interposing this spacer 50, the electric cable EC has a slack between the upper part and the already clamped portion. This slackness causes the nacelle 13 to rotate with respect to the tower 10, and the electric cable EC Even when a pulling force is applied to the electric cable EC by twisting, it is useful for preventing the electric cable EC from extending and being damaged.

The spacer 50 is generally cylindrical when attached to the support wire 20 and is bisected in the vertical direction so that it can be attached to the support wire 20 even after the support member 21 is attached to the support wire 20. The two cylindrical half portions 50A and 50B, and a C ring 51 fitted in a circumferential groove (not shown) formed in these cylindrical half portions.
The attachment of the spacer 50 can be performed in the following manner, for example. That is, after the electric cable EC is clamped by a certain electric cable clamp member 40, the support wire 20 is pulled up by a winch, the cable holding member 30 or 30A is attached to the next support member 21, and the electric cable EC is attached to the electric cable clamp member 40. Clamp with Thereafter, the support wire is lowered a little and the spacer 50 is attached to allow the electric cable EC to have a slack. This operation is preferably performed by installing a work table having a hole through which the support wire 20 and the electric cable EC can be passed from the bottom to the top at the bottom of the tower 12. In this case, when the support wire 20 is lowered as described above, only the support wire 20 is lowered by placing the cable holding member 30 or 30A on the work table, and the support wire 20 protruding downward from the hole of the work table. The spacer 50 is attached to the support member 21. Thereafter, the support wire 20 is pulled up again, the spacer 50 and the support member 21 are pulled into the sleeve 33, and the support wire 20 is further pulled up to pull the cable holding member 30 or 30A upward from the work table.

The present invention is not limited to the above-described embodiments, and various modifications as described below are possible.
For example, although the cable holding members 30 and 30A are supported by the support member 21 of the support wire 20 in the above embodiment, the support wire 20 including the support member 21 may be replaced with a chain. In this modified embodiment, the holes formed in the lid members 34 of the cable holding members 30 and 30A have, for example, a flat elliptical shape corresponding to the planar shape of each frame constituting the chain.

  In the above-described embodiment, the present invention is applied to the wind turbine generator. However, the first fixed structure and the second rotary structure that is rotatably attached to the top of the first fixed structure are provided. In general, the electrical device installed in the first fixed structure and the electrical device installed in the second rotating structure can be used in general structures connected by an electric cable.

It is a schematic whole view which shows the conventional wind power generator. 1 is a schematic overall view showing a wind turbine generator of the present invention. FIG. 3 is a partial cross-sectional enlarged side view showing a coupling state of a support wire, a cable holding member, and an electric cable used in the wind power generator shown in FIG. 2. FIG. 3 is a partial cross-sectional enlarged plan view showing a coupling state of a support wire, a cable holding member, and an electric cable used in the wind power generator shown in FIG. 2. FIG. 3 is an exploded plan view of a cable holding member used in the wind power generator shown in FIG. 2.

Explanation of symbols

10 Wind power generator (structure)
12 tower (fixed structure)
13 Nacelle (Rotating structure)
16 Nacelle electrical equipment (rotary structure electrical equipment)
17 Tower electrical equipment (fixed structure electrical equipment)
EC electric cable 20 support wire (support wire means)
30, 30A Electric cable holding member

Claims (9)

A fixed structure, and a rotating structure that is rotatably attached to an upper portion of the fixed structure. The fixed structure electric device installed in the fixed structure and the rotating structure installed in the rotating structure. A body connected to the body electrical equipment by an electrical cable,
A support wire means having an upper end attached to the rotating structure and a lower end attached to the stationary structure;
An electric cable holding member that is rotatably supported by the support wire means and holds the electric cable;
The structure. The electric cable holding member is
The support wire means has a guide sleeve therethrough, the guide sleeve comprising a lid member engaging the support wire means such that the guide sleeve is supported by the support wire means;
A holding plate extending outward from the guide sleeve;
The structure according to claim 1, further comprising: an electric cable clamp member that is attached to the holding plate and holds the electric cable.   The structure according to claim 2, wherein the electric cable holding member includes at least a pair of the holding plates extending diametrically outward from the guide sleeve, and an annular frame connecting the outer ends of the holding plates. A floor is provided in the structure between the fixed structure electric device and the rotating structure electric device, and the electric cable and the support wire means pass through the floor. An insertion hole extending
The electric cable holding member has a guide roller on the outer surface of the annular frame that can rotate around an axis extending substantially parallel to the support wire means, and the electric cable holding member including the guide roller includes: The structure according to claim 3, wherein the guide roller is disposed in the insertion hole so as to face an inner end surface of the floor constituting the insertion hole. A fixed structure, and a rotating structure that is rotatably attached to an upper portion of the fixed structure. The fixed structure electric device installed in the fixed structure and the rotating structure installed in the rotating structure. An electrical cable installation device for installing the electrical cable in a structure to which a body electrical device is connected by an electrical cable,
An electric cable holding member for holding the electric cable, rotatably supported by a support wire means extending between the rotating structure and the fixed structure;
The electric cable holding member is
The support wire means has a guide sleeve therethrough, the guide sleeve comprising a lid member engaging the support wire means such that the guide sleeve is supported by the support wire means;
A holding plate extending outward from the guide sleeve;
The electric cable installation device comprising: an electric cable clamp member that is attached to the holding plate and holds the electric cable.   The electric cable installation according to claim 5, wherein the electric cable holding member has at least a pair of the holding plates that extend diametrically outward from the guide sleeve, and an annular frame that connects outer ends of the holding plates. apparatus.   The electric cable installation device according to claim 6, wherein the electric cable holding member has a guide roller on an outer surface of the annular frame that can rotate around an axis extending substantially parallel to the electric cable. A fixed structure, and a rotating structure that is rotatably attached to an upper portion of the fixed structure. The fixed structure electric device installed in the fixed structure and the rotating structure installed in the rotating structure. An electrical cable installation method for installing the electrical cable in a structure to which a body electrical device is connected by an electrical cable,
A support member is provided on the support wire means,
The electrical cable holding member includes a guide sleeve through which the support wire means passes, the guide sleeve including the guide sleeve. Is provided with a lid member that engages with the support member such that the holding plate extends outwardly from the guide sleeve,
Holding the electrical cable on the holding plate;
Lifting the upper end of the support wire means to the rotating structure and fixing it to the rotating structure;
Attaching the lower end of the support wire means to the stationary structure;
An electrical cable installation method.   The electric cable installation method according to claim 8, further comprising interposing a spacer between the support member of the support wire means and the lid member of the guide sleeve after holding the electric cable on the holding plate.

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