JP2930271B2 - Cable swivel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable turning device for holding a cable for supplying power to a turning load.

[0002]

2. Description of the Related Art Among conventional cable turning devices, there is a cable turning device shown in FIG. 2, FIG. 3, FIG. 4, FIG. 5 and FIG. FIG.
FIG. 3 is a longitudinal sectional view showing a state in which this cable swivel device is installed inside a circular chamber 2 of a building 1 in which a control rod drive mechanism of a boiling water reactor is housed, and FIG. 4 is a partially enlarged detailed view of FIG. 3, and FIG. 5 is a Y view of FIG.
FIG. 6 is an enlarged detailed cross-sectional view taken along the line Y-Z in FIG. 3.

2, 3, 4, 5 and 6, a rail base 3 shown in FIG. 2 is provided above a wall 2 a of a circular chamber 2.
Are projected at intervals of 30 ° as shown in FIG.
Below the rails 3, receiving stands 10 longer than the rail bases 3 are also protruded at intervals of 30 ° as shown in FIG. A circular rail 4 having a diameter slightly smaller than the wall 2 a of the circular chamber 2 is mounted on the upper surface of the rail base 3, and is fixed to the rail base 3.

[0006] On the upper surface of the circular rail 4, a substantially disk-shaped slewing carriage 5 in a plan view (not shown) of FIG. Have been. On the upper surface of the swivel truck 5, wheels 5
A plurality of devices driven by other motors are mounted in addition to the motor driving a.

[0005] The swivel bogie 5 has a substantially L shape made of a channel steel.
As shown in FIG. 3, nine support frames 16 having a vertical cross section are provided at intervals of 30 ° on the wall 2 a side of the support rod 16.
An inner guide 27 which is formed in a letter shape and is formed in an arc shape (note: about 250 ° in FIG. 3) in the plan view of FIG. 3 is placed and fixed. At the upper end of the inner guide 27, a bent portion 27a slightly protruding toward the wall 2a is formed.

[0006] L-shaped mounting brackets 19a are respectively attached to both ends of the inner guide 27 in the arc shape shown in FIG. 3. The ends are each fixed.

On the other hand, on the upper surface of the receiving table 10, a longitudinal section is formed in an L-shape symmetrically with the inner guide 27, and in a plan view of FIG. 3, an outer diameter is substantially the same as that of the swivel carriage 5 shown in FIG. An outer guide 38 is coaxially mounted and fixed facing the inner guide 27. The upper surface of the outer guide 38 near the bottom inner circumference has an arc shape as shown on the left side of FIG.
°), a band-shaped regulating plate 9 is erected and fixed.

The outer guide 38 has a rear portion 38a in FIG.
4, a starting end 11A of a cable holder A composed of an upper chain 12A, a lower chain 12B, and the like, which will be described later with reference to FIG. 4, is fixed by bolts. The front end 27c of the inner guide 27 in FIG.
The terminal end 11B of the cable holding section A is also fixed as shown in FIG.

The lower part of one side of the upper chain 12A is shown in FIG.
As shown in FIG. 5, a roller 17A is attached to the lower chain 12B.
A roller 17B of the same product as A is attached. On the lower surface of the lower chain 12B, as shown in FIG. 5, two rollers 15 for rolling steel balls on the bottom surfaces of the inner guide 27 and the outer guide 38 are provided.
Mounted in a row.

[0010] Between the upper chain 12A and the lower chain 12B, as shown in FIG.
The cable insertion plate 13 has a plurality of holes 13a formed vertically and continuously. These holes 13a
, A cable 14 that feeds power from a power supply side (not shown) of the building 1 to devices above the swivel trolley 5 penetrates. On the other side surface of each cable insertion plate 13, a contact plate 18 formed substantially in a T shape in FIG. 4 and in a substantially trapezoidal shape in FIG. 5 is fixed vertically.

In the cable swivel device thus constructed, when the cable holding portion A is housed on the right side of the outer guide 38, the swivel bogie 5 is rotated counterclockwise as shown by reference numeral B in FIG. When driven in the direction, the cable holding portion A is bent from the start end 11A and stored in the inner guide 27 in order, as shown by the dashed line in FIG.

In the course of the turning of the turning cart 5, the rollers 17A and 17B abut on the opposing surfaces of the inner guide 27 and the outer guide 38 and roll. Rolling. Further, the cable holding portion A
2 moves outside the guide plate 19 shown in FIG.
As shown on the right side, the contact plate 18 of the cable holding portion A slides on the outer peripheral surface of the guide plate 19 to prevent the guide plate 19 from tilting inward. On the other hand, when moving on the left side in FIG. 2, the side surface of the roller 15 at the lower end is guided in contact with the regulating plate 9 as shown in FIG.

FIG. 7 is a cross-sectional view showing a conventional cable swivel device different from the cable swivel device shown in FIGS. 3 to 6, and is a view corresponding to FIG. 3, and FIG. FIG. 6 is an enlarged detail view corresponding to FIG. 5.

In FIGS. 7 and 8, the upper surfaces of the lower ends of a plurality of support frames 16 suspended from the swivel carriage 5 (not shown)
As in FIG. 2, an inner guide (hereinafter, simply referred to as a guide) 20 having an L-shaped longitudinal section and formed in an annular shape as shown in FIG. 7 is placed. Similarly, the pedestal 10 protruding from the wall 2a
As shown in FIG. 2, an outer guide (hereinafter, simply referred to as a guide) having an L-shaped longitudinal section and having an annular shape in FIG.
21 is placed and fixed.

Among them, the starting ends 22a, 23a of the chains 22, 23 shown in FIG. 8, which form an upper / lower pair as a cable holding part D, are fixed to a part 20a shown on the right side of FIG. The end portions 22 shown on the left side of FIG.
b and 23b are attached to a part 21a of the guide 21. Furthermore, each link constituting the chains 22, 23 has
Each cable insertion plate 24 is provided so as to connect the two chains 22, 23, and each cable is inserted through each insertion hole 24a formed in the insertion plate 24.
Further, on the lower surface of the chain 23, casters 25 are provided for each guide.
It is provided in contact with the bottom of 20, 21 and the chain 2
Rollers 27, 27 are provided at the upper ends of the rollers 2, 23 in contact with an arc-shaped frame described later.

The cable holding portion D having such a configuration is arranged in an arc shape across the guides 20 and 21, and a cable holding portion E having the same configuration as the cable holding portion D faces the cable holding portion D. It is arranged.

Between the cable holding part D and the cable holding part E, between the guide 20 and the guide 21 is an arc shape in FIG.
In FIG. 8, a rectangular guide frame 28 is housed.
On the lower surface of the guide frame 28, casters 29 are provided in two rows so as to be in contact with the upper surfaces of the lower ends of the guides 20, 21. Rollers 26, 27 roll on the upper and lower ends of the side surfaces of the guide frame 28, And is being guided.

As shown in FIG. 7, seven caster mounting brackets 30 are mounted at equal intervals on the upper end of the guide frame 28. At the tip of the caster mounting bracket 30, a caster 31 is mounted on each of the guides 20 and 21 by a roller. Is provided so as to abut. As a result, the guide frame 28 is movable while being guided by the guides 20 and 21.

In the cable swivel device thus configured, the swivel 5 is turned right or left, so that the cable holding portions D and E are connected to the guide 20.
The guide frame 28 abuts on the cable holding portions D and E via the rollers 26 and 27 and the casters 31, and the cable holding portions D and E fall or come off. It is configured not to be. In addition, since the cable holding portions D and E can be arranged, the double cable can be driven to rotate.

[0020]

[Problems to be solved by the invention]
In the former cable turning device, when the number of cables 14 increases, the height of the cable holding portion A increases.
When the position of the center of gravity increases, and the guide plate 19 is not in contact with the contact plate 18, when the cable holding portion A is driven to rotate, the cable holding portion A cannot be self-standing and may fall down.

On the other hand, in the latter cable swivel device, two sets of the cable holding portions D and E can be arranged facing each other, so that the cable can be transported twice as much as in the former case. Since it must be laid all over the interior, not only is the structure complicated, but also the weight increases.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and an object thereof is to prevent a cable holding portion from falling down even if the number of cables is increased, and to reduce a laying space. It is an object of the present invention to provide a cable swivel device that can perform the following.

[0023]

According to the present invention, there is provided an annular outer guide, an inner guide provided inside the outer guide and suspended on a swivel truck provided above the outer guide.
This is a cable turning device comprising a plurality of cable holding portions provided with a plurality of rollers which are accommodated in the inner guide and the outer guide in a vertically multi-stage manner and roll in contact with the inner guide and the outer guide.

[0024]

A plurality of cables can be arranged without increasing the widths of the inner guide and the outer guide by housing the cable holding portion in the inner guide and the outer guide in a plurality of stages vertically.

[0025]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.
It is a figure corresponding to the conventional FIG. Note that the same components as those in the related art are denoted by the same reference numerals.

In FIG. 1, a support frame 6 about twice as long as the conventional support frame is suspended from the revolving bogie 5 at predetermined intervals. The support frame 6 has a plan view (not shown). The inner guide 7 is formed in an arc shape, and is about twice as high as the conventional inner guide 27. An annular partition 7a is protruded from the center of the outer surface of the inner guide 7.

On the other hand, on the wall 2a of the circular chamber 2, an outer guide 8 having an arc shape and having a height approximately twice that of the conventional outer guide 38 and having a symmetrical longitudinal section with the inner guide 7 is provided. It is placed on 10 and fixed. In the middle of this outer guide 8,
A partition 8a protrudes inward facing the partition 7a, and a regulating plate 9 similar to the conventional one is erected on the upper surface of the inner peripheral end of the partition 8a. A regulating plate 9 is also provided upright on the upper surface of the inner guide 7 near the bottom of the outer guide 8 as in the prior art. In the inner guide 7 and the outer guide 8, the same cable holding portion A as the conventional cable holding portion A is housed vertically. Next, the operation of the cable turning device of the present invention thus configured will be described.

By rotating the swivel truck 5 clockwise or counterclockwise, each cable holding portion A holding each cable 14 is made to have an arc-shaped regulating plate 9, The contact plate 18 of the insertion plate 13 and the guide plate 19 smoothly rotate to a desired position.

That is, the guide plates 19, both ends of which are supported by the inner guide 33, come into contact with the abutment plates 18 of the respective cable holding portions A, regulate the positions of the respective cable holding portions A, and control the positions of the respective cable holding portions A. To prevent falling. In the portion corresponding to the portion C in FIG. 3, the roller 17B abuts against the arc-shaped regulating plate 9 as in the conventional case, and the balance of each cable holding portion A can be maintained. Since the upper and lower cable holding portions A are interchangeable, manufacture and assembly are easy.

[0030]

As described above, according to the present invention, an annular outer guide, an inner guide suspended on a swivel truck provided above the outer guide, and provided inside the outer guide, the inner guide and the outer guide The width of the inner guide and the outer guide is increased by configuring the cable turning device with a plurality of cable holding units provided with a plurality of rollers that are stored in the guide in a plurality of upper and lower stages and roll while contacting the inner guide and the outer guide. Without the need for a large number of cables.
Even if the number of cables increases, it is possible to provide a cable turning device that can prevent the cable holding portion from falling down and reduce the installation space.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a cable turning device according to the present invention.

FIG. 2 is a longitudinal sectional view showing an example of a conventional cable turning device.

FIG. 3 is an enlarged cross-sectional view taken along line XX of FIG. 2;

FIG. 4 is a partial plan view showing a main part of a conventional cable turning device.

FIG. 5 is an enlarged detailed sectional view taken along line YY of FIG. 3;

FIG. 6 is an enlarged detailed sectional view taken along the line ZZ of FIG. 3;

FIG. 7 is a cross-sectional view showing an example of a conventional cable swivel device different from the conventional cable swivel device shown in FIGS. 2, 3, 4, 5 and 6;

FIG. 8 is an enlarged detailed view taken along the line TT in FIG. 8;

[Explanation of symbols]

1 ... building, 2 ... circular room, 3 ... rail stand, 4 ... circular rail,
Reference numeral 5: swivel truck, 6: support frame, 7: inner guide, 8: outer guide, 9: regulating plate, 10: receiving stand, 15, 17A, 17B: roller, 18: contact plate, 19: guide plate.

Claims (1)

(57) [Claims] 1. An annular outer guide, an inner guide suspended on a swivel truck provided above the outer guide, and provided inside the outer guide, and stored in the inner guide and the outer guide in multiple vertical stages. And a plurality of cable holding portions provided with a plurality of rollers rolling in contact with the inner guide and the outer guide.