JPH0937425A - Cable support and overhead cable holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an overhead cable holder capable of supporting a plurality of cables simultaneously without damaging the cables and to easily performed overhead cable holding work by using the cable support. SOLUTION: A telescopic boom 25 installed on a frame 22 is freely extendible in a vertical direction, a cable support 10 is provided at the tip portion of this telescopic boom 25 thereby forming an overhead cable holder. This cable support 10 is extended in a vertical direction, has a hollow through-hole space and formed to a cylindrical shape. A cable 27 is supported by inserting it through this hollow space, and the extending direction of the cable is guided by sliding and contacting along the inner peripheral surface of the hollow space. Here, the inner peripheral surface near the upper portion of the hollow space of the cable supporter 10 is formed smoothly wider outwardly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable support device for aerial holding one or a plurality of cables fed from a transformer or the like when performing bypass construction of a transmission line arranged on a utility pole. The present invention relates to a cable overhead holding device using a cable supporting device.

[0002]

2. Description of the Related Art The applicant of the present invention, as a cable support device for supporting a plurality of cables fed from a transformer disposed on a vehicle when performing bypass construction, is the applicant's fairness 4-4.
A cable supporting device disclosed in Japanese Patent No. 1689 has been proposed.

In this cable supporting device, shafts are horizontally projected to the left and right sides of an arm swingably provided in a horizontal plane, and a plurality of independently rotatable sheaves are mounted on the shafts. . Further, a roller that swings and opens and closes is attached to the arm in order to prevent the cable spanning the sheave from coming off the sheave.

The cable supporting device thus constructed constitutes a cable overhead holding device by being arranged on the upper end of the telescopic boom which is vertically expandable and contractable with respect to the vehicle body. When carrying out overhead holding work for multiple cables using this cable overhead holding device, first swing the rollers in the opening direction to separate them from the sheave, and in this state, hang the cables holding the overhead overhead. hand over. Then, after that, the rollers are swung again to be closed to prevent the cables from coming off, and the telescopic boom is extended upward to hold each cable in an overhead state. At this time, since the portion of each cable that is imaginarily held by its own weight is pulled, the slack (the slackness of the cable) is adjusted for each cable.

[0005]

However, in the cable supporting device constructed as described above, the surface of the cable may be damaged by the groove or roller formed in the sheave in order to prevent the cable from coming off the sheave. There was a problem.

Further, when the cable is held overhead by using the cable overhead holding device provided with the cable supporting device thus constructed, the arm to which the sheave is attached is rotatable with respect to the telescopic boom. , Since two cables cannot be unwound in different directions at the same time, in order to unwound the cables in different directions, it is necessary to swivel the arm in the other direction after unwinding in one direction. There was also a problem that work efficiency declined.

Furthermore, since the cable is wound around a freely rotatable sheave, when the telescopic boom is extended, the weight of the cable largely acts and the tensile force of the cable that is aerial-held is increased, so that the cable is frequently used. There is also a problem that it is necessary to adjust the sag and the work of holding the cable in an overhead state becomes complicated.

The present invention has been made in view of the above problems, and provides a cable supporting device capable of simultaneously supporting a plurality of unwound cables without damaging the cables, and at the same time, supporting the cable. An object of the present invention is to provide a cable overhead holding device that can easily perform overhead cable holding work using the device.

[0009]

In order to achieve the above object, the cable supporting device of the present invention is formed in a tubular shape having a hollow space extending from the distal end direction to the proximal end direction and penetrating therethrough. The cable is supported by passing through the hollow space and is slidably contacted with the inner peripheral surface of the hollow space to guide the cable in the feeding direction. Then, the inner peripheral surface in the vicinity of the tip end portion or the base end portion in the hollow space is formed so as to smoothly spread to the outside.

According to the cable supporting device having such a structure, since the cable passes through the hollow space, it does not come off from the cable supporting device, and the inner peripheral surface changes its direction to the direction in which it spreads out smoothly. , Is smoothly drawn into the hollow space from the direction in which the inner peripheral surface expands.

Further, the above-mentioned cable supporting device is arranged in the vicinity of the tip of the supporting member arranged on the base, and the cable passing through the hollow space of the cable supporting device on the base is pulled out and drawn in. A cable overhead holding device may be configured by arranging a cable feeding / retracting device for performing the above. Then, by forming the inner peripheral surface of the cable supporting device of the cable overhead holding device on the tip end side so as to smoothly spread to the outside, the cable positioned on the tip end side in sliding contact with the inner peripheral surface is extended and retracted. By making a guide that changes the direction of the cable, etc. into a substantially horizontal direction, and forming the cross-sectional shape of the hollow space into a substantially circular shape, at the tip of the cable support device, multiple cables can be simultaneously fed out or pulled in different directions. . It should be noted that the substantially circular shape is intended to include not only a perfect circle but also an oval shape or an oval shape.

According to the aerial cable holding device constructed as described above, the cable fed from the base end side is slid on the inner peripheral surface expanded to the tip end side so that the cable is guided horizontally and is aerial. Although it can be held, the frictional resistance of this sliding surface reduces the pulling force due to the weight of the cable fed from the base end side with respect to the cable that is being held in an imaginary manner. Will be easier. Furthermore, since it is possible to feed out a plurality of cables in different directions at the same time and pull them in from different directions, the work efficiency of the overhead holding work is improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. First, a variable work vehicle 20, which is a cable overhead holding device provided with a cable supporting device 10 according to the present invention, will be described with reference to FIG. The variable work vehicle 20 is a truck 21 that is a vehicle that can run.
A transformer 23 is provided on the front side of the loading platform 22 and a cable drum 241, 24 around which a primary side cable and a secondary side cable are wound on the rear side of the loading platform (base) 22.
A cable feeding / winding device (cable feeding / pulling-in device) 24 provided with 2 is provided.

On the platform 22 between the transformer 23 and the cable feeding / winding device 24, a telescopic boom (support member) 25 which is vertically vertically extendable is vertically installed. An arm 26 extending in the horizontal direction is attached to the upper end of the telescopic boom 25, and the cable support device 10 is attached to the tip of the arm 26. The primary side cable and the secondary side cable, which are wound around the cable drum 241 and the like and one end of which is connected to the transformer 23, are supported by this cable support device 10 and are imaginarily held.

Next, the cable support device 10 will be described with reference to FIGS. 2 and 3. Cable support device 10
Is composed of a bell mouth portion 11 formed in a cylindrical shape with upper and lower ends widened, and a mounting member 12 having one end fixed to one location on an outer peripheral surface of the bell mouth portion 11 and the other end attached to an arm 26. It is configured.

The bell mouth portion 11 is formed to have a hollow space 13 having a circular cross section, and an inner peripheral surface 11d in the hollow space 13 extends from an intermediate portion 11c to upper and lower end portions (a tip portion and a base end portion). ) A smooth curve is drawn toward 11a and 11b and gradually spreads, and the upper end 11a and the lower end 1
The inner diameter D1 of 1b is formed to be larger than the inner diameter D2 of the intermediate portion 11c.

The inner diameter D2 of the intermediate portion 11c is formed to have a size such that a plurality of cables 27 (about 4 cables) can pass through at the same time. Further, the bell mouth portion 11 is
In order to improve durability, it is integrally formed by drawing or casting a metal material, and the inner peripheral surface 11d reduces resistance when the cable 27 slides and improves abrasion resistance. Therefore, hard chrome plating is applied after finishing the surface smoothly.

A mounting member 12 is fixed to the outer peripheral side surface of the bell mouth portion 11. When the bell mouth portion 11 is cast, the mounting portion 12 may be worked together. The cable supporting device 10 thus configured is attached to the tip of the arm 26 so that the bell mouth portion 11 opens in the vertical direction.

When performing a transformation work using the transformation work vehicle 20 provided with the cable support device 10 as described above, first, the primary side cable wound around the cable drum 241 of the cable feeding / winding device 24 is wound. 27
a and the secondary side cable 27b are extended. Next, the base ends of the primary side cable 27a and the secondary side cable 27b are connected to the transformer 23, and the other ends of the cables 27a and 27b are connected to the lower end 11b side of the bell mouth part 11 as shown by the chain line in FIG. From the opening toward the opening on the side of the upper end portion 11a in the direction indicated by the arrow K to penetrate the inside of the hollow space 13.

The tip of the primary-side cable 27a penetrating the bell mouth portion 11 is connected to a high-voltage electric wire on the high-voltage power supply side, which is located in front of the variable work vehicle 20 (left side in FIG. 4). Further, the tip of the secondary cable 27b is connected to the low-voltage electric wire located at the rear (right side in FIG. 4) of the variable work vehicle 20. And telescopic boom 25
Position at any height, then the primary cable 27
The sag of the secondary cable 27a and the secondary side cable 27b is adjusted to give an appropriate sag to the cables 27a and 27b.

At this time, in the conventional cable supporting device, since the cable is wound around the rotatable sheave, the contact resistance between the cable and the cable supporting device is small, and the cable is clamped below the telescopic boom 25. It was necessary to constantly adjust the sag. However, in the cable supporting device 10 according to the present invention, since an appropriate contact resistance is generated between the cable supporting device 10 and each of the cables 27a and 27b, it is possible to reduce the slack adjusting work.

In the above embodiment, the case where the cables 27 are distributed in the front and rear direction of the variable work vehicle 20 above the cable support device 10 has been described.
Since the hollow space of the bell mouth portion 11 is formed in a circular shape, the cable 27 can be paid out in any of front, rear, left and right directions. Further, by changing the diameter of the inner diameter D2 of the intermediate portion 11c, the number of cables that can be simultaneously supported can be changed.

Further, in the bell mouth portion 11 configured as described above, since the lower end surface 11b side is also formed to open outward, even if the position of the cable 27 fed from the cable drum 241 moves ( The cable 27 is not damaged even if it is extended from the right side as shown by the arrow K'in FIG.

Further, in the above embodiment, the cable support device 10 opened in the vertical direction is provided on the telescopic boom 25 which is vertically extendable and retractable with respect to the base (load platform 22) as a supporting member, and Although the description has been given of the case where the cable 27 extends in the vertical direction and penetrates the inside of the cable support device 10, and then the cable 27 extends in the horizontal direction and is paid out. However, the present invention is not limited to this, and the support member is not necessarily expanded and contracted. In addition to the above, the cable 27 is not necessarily limited to the one that extends in the vertical direction and is paid out.

For example, when it is used in a device for pulling out a cable buried in the ground (winding it up on a cable feeding / winding device), it is placed on a base (not shown) as shown in FIG. The support member 45 may be horizontally arranged, the cable support device 40 may be horizontally arranged on the support member 45, and the cable 47 may be pulled out in the arrow H direction.

In this case, if the height in the horizontal direction is constant, the bell mouth portion 41 may be formed so that the inlet side 41a of the cable 47 is widened outward, and the outlet side 41b is necessarily widened. There is no. Therefore, even in the cable supporting device 10, if the position where the cable 27 enters is constant, it is not necessary to widen and form the lower end surface 11b.

Further, in each of the above-mentioned embodiments, if the direction in which the cable goes in and out of the bell mouth is constant, it may be formed so as to spread smoothly at least in that direction. Therefore, the cross-sectional shape of the inner peripheral space is not limited to the circular shape, and may be formed in a polygonal shape such as a quadrangle.

[0028]

As described above, in the cable supporting device of the present invention, since the inner peripheral surface near the tip or the base end of the hollow space through which the cable passes is formed to spread smoothly outward, By sliding the cable to the inner peripheral surface, it is possible to guide the cable without damaging it when changing the direction in which the cable is extended or retracted.

In such a cable supporting device, the hollow space is formed to have a substantially circular cross-sectional shape, and at least the inner peripheral surface near the tip end portion is formed to expand outward. A cable overhead holding device may be arranged near the tip of a support member such as a telescopic boom placed above, and when performing a cable overhead holding work using such a cable overhead holding device. Can support multiple cables at the same time, can extend the cable in different directions, pull in the cable from different directions, and further, due to the contact resistance when the cable passes through the cable support device. It is possible to easily adjust the sag of the cable when it is held overhead.

[Brief description of drawings]

FIG. 1 is a side view of a power conversion work vehicle including a cable support device according to the present invention.

FIG. 2 is an arrow II in FIG. 1 of the cable supporting device.
It is a top view seen from the direction.

FIG. 3 is an arrow II in FIG. 2 of the cable support device.
It is an I-III sectional view.

FIG. 4 is a cross-sectional view taken along the line III-III of FIG. 2 showing the cable supporting device, showing a state in which a cable has penetrated.

FIG. 5 is a side view of a cable support device having another configuration.

[Explanation of symbols]

 10, 40 Cable support device 11 Bell mouth part 12 Mounting part 20 Transformer work vehicle 25 Telescopic boom 26 Arm 27, 47 Cable 241 Cable drum

Claims (2)

[Claims] 1. A cable formed in a tubular shape having a hollow space extending from the tip end direction to the base end direction and penetrating through the hollow space is supported by passing the cable into and out of the hollow space. A cable supporting device that guides in a direction such as drawing out by sliding contact with the inner peripheral surface of the hollow space and retracting, wherein at least one of the inner peripheral surface near the distal end portion and the proximal end portion in the hollow space is smooth. The cable support device is characterized in that it is formed so as to spread to the outside. 2. A cable supporting device, a supporting member disposed on a base, the cable supporting device being disposed near a tip portion, and a supporting member disposed on the base, A cable aerial holding device comprising a cable feeding / pulling device for feeding and pulling a cable through the hollow space, wherein at least the inner peripheral surface on the tip end side is formed so as to spread smoothly outward, By guiding the cable located on the tip end side by sliding it to the inner peripheral surface to change the direction of feeding, pulling, etc. into a substantially horizontal direction, the hollow space is formed into a substantially circular cross-sectional shape, and a plurality of cables are formed. When the cable is extended and retracted at the same time, the cable can be extended and retracted in different directions on the tip end side of the cable support device. And cable fictional retention device, characterized in that it is.