JPH0419925Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a suspension rope tension holding device for a temporary electric wire construction vehicle used when working on electric cables such as power transmission lines strung on utility poles.

(Prior Art) Generally, on the chassis of a temporary electric wire work vehicle, there is a wire drum around which temporary electric wires are wound, a pilot rope drum around which a pilot rope is wound for feeding out the temporary electric wires from the drum, and a pilot rope drum for hoisting the temporary electric wires. Various equipment is mounted on the system, including a suspension rope drum wrapped with suspension ropes for guiding it between utility poles.

As shown in FIG. 5, the suspension rope A has one end fixed to a utility pole, the other end wound around a suspension rope drum 45, and stretched below the power transmission line.
The pilot rope B is stretched below the suspension rope A via a pulley K. A temporary electric wire C is connected to one end of the pilot rope B, and the temporary electric wire C and the suspension rope A are bundled with a hook F. When the pilot rope B is wound up on the pilot rope drum 9, the temporary electric wire C is guided by the suspension rope A from the electric wire drum 12 and is let out. When the temporary electric wire C is let out to a predetermined position, both ends thereof are connected to the power transmission line D as shown in FIG. 6, and power transmission through the temporary electric wire C is started. During this time, construction work will be carried out on the power transmission lines.

(Problem to be solved by the invention) By the way, since the suspension rope A is used to suspend and guide the temporary electric wire C through the hook F, it must be kept taut between the utility poles at all times during the work. Must be. If the suspension rope A is stretched loosely, the suspension rope A will not be able to fully guide the hook F, and if this causes the hook F to fall off from the suspension rope A. If something happens, the temporary electric wire C will also fall off at the same time, making it impossible to pay out or wind up the temporary electric wire C.

The weight of the suspension rope A during operation, the weight of the temporary electric wire C, and the weight of the hook F are applied to the suspension rope A.
If the tension of the suspension rope A is such that these weights cannot be supported, the suspension rope A
On the other hand, if excessive tension is applied to the suspension rope A to prevent this loosening, it will break. Temporary electric wire C that is drawn out depending on the location where the vehicle is stopped
Since the lengths of the ropes and the like vary, and the weights mentioned above also vary each time, appropriate tension must be applied to the suspension rope A according to the weights.

During the work, the wheels of the vehicle are chocked to prevent the vehicle from moving, but if the wheel chock loosens and the vehicle moves even slightly, this will also cause the suspension rope A to loosen.

If tension is applied to the suspension rope A by winding it up with the suspension rope drum 45, sufficient tension cannot be applied, and even if sufficient tension can be applied, the above-mentioned temporary electric wire C cannot be applied. There is also a risk that the hanging rope A may become loose due to weight etc. (Japanese Utility Model Publication No. 58-48898, Japanese Patent Publication No. 59-24014).

SUMMARY OF THE INVENTION Therefore, the purpose of the present invention is to solve the above-mentioned problems of the conventional technology, and to be able to apply sufficient tension to the suspension rope when it is stretched between utility poles, and to To provide a suspension rope tension maintaining device for a temporary electric wire work vehicle, which can always maintain the tension during the process.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a suspension rope that suspends and guides temporary electric wires led out from a wire drum mounted on a vehicle chassis. In a temporary electric wire work vehicle equipped with a hanging rope drum that can freely unwind and wind up a rope, a guide roller that guides the hanging rope and applies tension to the rope and a guide device for the temporary electric wire are moved vertically. The upper end of the swinging arm arranged and held at the lower end is swingably supported on a fixed part on the vehicle chassis, and the above-mentioned hanging rope drum is arranged such that the swinging arm is able to let out and wind up the hanging rope. The swinging arm is rotatably supported, and the swinging arm is swinged by a telescoping hydraulic cylinder to adjust the tension applied to the suspended rope by the pressure of the hydraulic pressure supplied to the cylinder, and further The present invention is characterized in that it includes a drum stopper pin for non-rotatably fixing the suspended rope drum to the swing arm, and a pressure switch for preventing pressure reduction on the pressure port side of the telescoping hydraulic cylinder.

(Function) According to the present invention, by rotating the suspension rope drum and winding up the suspension rope, the rope is stretched at a predetermined position, and then the suspension rope is connected to the suspension rope drum via the drum stop pin. is non-rotatably fixed to a swinging arm, and in this state, the swinging arm is swung by a telescoping hydraulic cylinder, thereby making it possible to apply a predetermined tension to a suspension rope stretched between utility poles or the like. This tension is adjusted by the pressure of the hydraulic pressure supplied to the cylinder, and when the suspension rope loosens, a pressure switch to prevent decompression is activated and automatically increases the amount of hydraulic pressure supplied to the telescopic hydraulic cylinder. A constant tension is maintained.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In FIG. 1, reference numeral 1 indicates a box-shaped body mounted on a chassis 2. As shown in FIG. At the rear of the body 1, there are fan plates 3, 3 that are open to the sides and can be fixed in a horizontal position, a table lifter 5 that is open to the rear and can be moved up and down, and a side surface of the body 1 that is open to the sides. Side plates 6, 6 that can be retracted to the outside and a shutter 7 that can be slid upward and retracted into the ceiling surface of the body 1 are provided. These are opened during work to ensure sufficient work space at the rear.

A pilot rope drum 9 driven by a hydraulic motor 8 for winding up the pilot rope B is disposed at the rear of the chassis 2, and this pilot rope drum unit can be moved and fixed to either the left or right side of the chassis 2. It's becoming like that. An extension pilot rope drum 10 on which an extension pilot rope B is wound and an extension suspension rope drum 1 on which an extension suspension rope A is wound.
1 is arranged so that it can freely rotate around a vertical axis.

Furthermore, a plurality of electric wire drums 12 are disposed inside the body 1 and are supported so as to be freely rotatable and rotatable.
Various temporary electric wires C having different wire diameters are wound around these electric wire drums 12.

FIG. 2 is a side view showing the state in which the wire drum 12 is supported, and FIG. 3 is a plan view thereof. A pair of mounts 13 are fixedly installed on both sides of the chassis 2.
A main shaft 16 is rotatably supported horizontally through a bearing 15. As is clear from FIGS. 2 and 3, one end of the main shaft 16 has three first support arms 17, 1 extending radially.
7, 17 are fixed, and three second support arms 18, 18, 18 are fixed to the other end in the same manner as above, out of phase with the first support arms 17, 17, 17, and in the center thereof. Six third support arms 19 are fixed to each of the first and second support arms 17 and 18, respectively. Furthermore, a receiving hole 20 is formed at the tip of each support arm 17 , 18 , 19 at a position equidistant from the axis of the main shaft 16 . Between the receiving hole 20 of the first bearing arm 17 and the receiving hole 20 of the third bearing arm 19 opposite thereto, and between the receiving hole 20 of the second bearing arm 18 and the receiving hole of the third bearing arm 19 opposite thereto. A support shaft 21 is spanned between the support shaft 20 and the wire drum 12, and the electric wire drum 12 is rotatably mounted on the shaft of this support shaft 21. Each electric wire drum 12 has ribs 12a and 12b formed at both ends, and a gear 22 is fixed to the outside of one rib 12a concentrically with a support shaft 21, and this gear 22 is the output of a hydraulic motor 23 for rotation, which will be described later. It is adapted to mesh with a gear 25 fixed to the shaft.

The main shaft 16 is rotationally driven by a revolution hydraulic motor 26, and the output shaft of the revolution hydraulic motor 26 and the main shaft 16 are connected via sprockets 27, 28 and a chain 29 fixed to each shaft end. These constitute a main shaft drive. The main shaft 16 is rotationally driven, and each electric wire drum 12 is integrated into the main shaft 16.
When the area is moved, the necessary type of temporary electric wire C
The electric wire drum 12 wound with the electric wire C is moved to the temporary electric wire C take-out position facing the rear open end of the body 1, as shown in FIG. At this take-out position, the wire drum 12
The gear 22 and the gear 25 of the rotation hydraulic motor 23 are meshed with each other via intermediate gears 30 and 31. Each of the intermediate gears 30 and 31 is fixed on a rotating shaft 33 that is rotatably supported via a pair of bearings 32 and 32 that are fixed to the chassis 2.
0 is gear 22, the other intermediate gear 31 is gear 25
is engaged with. These constitute a wire drum drive. In addition, pressure oil is sent to the above-mentioned hydraulic motors 23 and 26 for rotation and revolution from a hydraulic pump (not shown), and this hydraulic pump uses a known means to control the running of the vehicle via a power take-off and disconnection device (PTO). It is configured to obtain power from a commercial engine.

Further, a sprocket 34 is fixed to the output shaft of the hydraulic motor 23 for rotation, and when this is driven,
A cylinder hydraulic pump 36 is driven via the sprocket 34 and chain 35. Pressure oil from the hydraulic pump 36 is sent to the telescopic cylinder 37,
This telescopic movement is translated into horizontal movement of the guide member 38 (FIG. 2). As is clear from FIG. 2, the guide member 38 is used to guide the temporary electric wire C so that it can be smoothly unwound or wound up, and in particular, it is moved horizontally during winding and is moved toward the electric wire drum 12. It acts to prevent random winding. Telescopic cylinder 37 and guide member 3
8 is suspended via a pair of brackets 40, 40, which are pivotally connected via a pin 42 to the free end of a fixed arm 41 fixed to the pedestal 13. The tip of a piston rod of a swing cylinder 43 is pin-coupled to the brackets 40, 40, and the rear end of the cylinder is pin-coupled to the pedestal 13 side. The swing cylinder 43 moves the guide member 38 up and down. The guide member 38 is raised to attach and detach the drum 12.

Next, a suspension rope tension maintaining device according to the present invention will be explained. At the rear upper end of the body 1, there is provided a suspension rope drum 45 around which a suspension rope A is wound. When doing so, it is used by jointing it with the above-mentioned extension suspension rope A in the middle.

As is clear from FIG. 4, this hanging rope drum 45 has a pair of swing arms 100 arranged in parallel.
It is rotatably supported around a support shaft 101 and driven by a hydraulic motor 116 (FIG. 3). The base end of the swing arm 100 is pivotally connected to a fixed part at the rear upper end of the body 1 via a pin 102, and a telescopic hydraulic pressure is connected between one end 100a of the bifurcated free end and the fixed part at the rear upper end of the body 1. Cylinder 103 is pin 10
4,105. A first guide roller 106 for guiding the suspension rope A is rotatably mounted between the other free end 100b, and a pair of holders 107 are pivotally supported at both ends of the first guide roller 106. and this holder 107
Second, third, and fourth guide rollers 108, 109, and 110 for guiding the temporary electric wire C are rotatably mounted therebetween. Furthermore, the holder 107
Arms 11 projecting laterally at the upper and lower ends.
1 and 112 are fixed, and a pair of fifth and sixth guide rollers 113 and 11 are provided between the arms 111 and 112 to guide the temporary electric wire C from falling off to the left and right.
4 is rotatably mounted. These constitute a guide device for the temporary electric wire C.

When the telescopic hydraulic cylinder 103 is contracted, the swing arm 100 swings clockwise in the figure with the pin 102 as a fulcrum, and tension is applied to the suspension rope A. This tension is adjusted by the pressure of pressure oil supplied to the telescopic hydraulic cylinder 103. A pressure switch (not shown) for preventing pressure reduction is provided on the pressure port side of the telescopic hydraulic cylinder 103, and pressure oil is supplied so that the telescopic hydraulic cylinder 103 contracts when the pressure switch is activated. Also,
Since the suspension rope A is wound around the suspension rope drum 45, a certain amount of tension is applied to it, but in this state, the suspension rope drum 45 also comes to be locked via the drum stopper pin 115. ing.

In addition, bearings 5 are provided at both ends of the rear upper part of the body 1.
A drive shaft 56 supported by shafts 5 and 55 is mounted horizontally, and this shaft 56 is supported by chains 57 at both ends.
It is connected to shutter electric motors 58, 58 via. A pair of pinion gears 59 are fixed on the shaft of the drive shaft 56, and a rack (not shown) made of a flexible material that can mesh with the pinion gears 59 is fixed to the inner surface of the shutter 7. As a result, the shutter electric motor 58,
When the pinion gear 58 is driven, the pinion gear 59 rotates, and the shutter 7 is moved in and out of the ceiling surface of the body 1 via the rack. Note that it is possible to drive the shutter only on one side.

Next, the operation of the temporary electric wire construction vehicle according to the present invention will be explained.

First, in order to stretch the suspension rope A between utility poles as shown in FIG. 5, the extension suspension rope A is manually pulled out from the extension suspension rope drum 11 and its tip is fixed to the utility pole. Further, the other end of the suspension rope A for extension is jointed to the tip of the suspension rope A wound around the suspension rope drum 45. Thereafter, the suspension rope drum 45 is driven to start winding the suspension rope A. After the suspension rope A is stretched at a predetermined position (the position shown in Fig. 5), the drum stop pin 11 is
5 locks the suspended rope drum 45.

According to the present invention, when the suspension rope A is loosely tensioned, the above-mentioned pressure switch (not shown) for preventing decompression is activated and the telescopic hydraulic cylinder 103 is biased toward the contraction side. Then, the swinging arm 100 swings to increase the tension applied to the suspension rope A. A similar tension is applied even if the suspension rope A becomes loose during work.

Next, the pilot rope B is stretched through a pulley K as shown in the figure, and the pilot rope B wound around the pilot rope drum 9 is jointed to one end of the pulley K. Furthermore, a temporary electric wire C wound around an electric wire drum 12 is jointed to the other end of the pilot rope B. Note that three temporary three-phase electric wires C are wound around the electric wire drum 12.
This is jointed to one pilot rope B.

Note that, prior to the joint between the temporary electric wire C and the pilot rope B, the electric wire drum 12 is moved to the above-mentioned temporary electric wire take-out position. When the revolution hydraulic motor 26 is driven, the main shaft 16 rotates via the chain 29, and each wire drum 12 revolves around the shaft. When the wire drum 12 on which the necessary temporary wire C is wound reaches the take-out position, the revolution hydraulic motor 26 is stopped, the gear 22 of the wire drum 12 and the intermediate gear 30 are engaged, and the wire drum 12 rotates on its own axis. become possible.

Thereafter, the hydraulic motor 8 is driven and the pilot rope drum 9 starts winding up the pilot rope B, and the temporary electric wires C are sequentially let out guided by the pilot rope B. The temporary electric wires C are bundled onto the suspension rope A via hooks F at appropriate positions. This work is done by hand. After the temporary electric wire C guided by the suspension rope A is let out to a predetermined position, both ends of the temporary electric wire C are jointed to the power transmission line D as shown in Fig. 6, and the construction work on the power transmission line D during this time is completed. It is done.

[Effect of idea]

Since the configuration is as described above, according to the present invention,
Appropriate tension can be applied to the suspension rope when it is strung between telephone poles, etc., and the appropriate tension can be maintained for a long period of time by preventing loosening during the work. Not only can the swing arm be maintained, but the swing arm can also serve as a guide device that guides the temporary wire via a guide for the temporary wire held at its lower end.

Therefore, adjusting and maintaining the tension of the suspension rope,
Moreover, the device for freely guiding the temporary electric wire can be made compact.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a temporary electric wire construction vehicle according to the present invention, Fig. 2 is a side view of the same, Fig. 3 is a plan view of the same, and Fig. 4 is a perspective view of a temporary electric wire construction vehicle according to the present invention.
The figure is a side view showing one embodiment of the suspension rope tension holding device according to the present invention, and FIGS. 5 and 6 are explanatory diagrams illustrating the power transmission line construction procedure using a temporary electric wire construction vehicle. DESCRIPTION OF SYMBOLS 1... Body, 2... Chassis, 8... Hydraulic motor, 9... Pilot rope drum, 10... Pilot rope drum for extension, 11... Hanging rope drum for extension, 12... Electric wire drum, 13... …
Frame, 16... main shaft, 17... first support arm,
18... Second support arm, 19... Third support arm, 22, 25, 30, 31... Gear, 23...
Hydraulic motor for rotation, 26...Hydraulic motor for revolution,
36...Hydraulic pump, 37...Telescopic cylinder, 4
5... Hanging rope drum, 100... Swinging arm, 103... Telescopic hydraulic cylinder, 106, 10
8, 109, 110, 113, 114... Guide roller, 107... Holder, A... Hanging rope,
B... Pilot rope, C... Temporary electric wire, D...
...Power line, F...futsuk.

Claims (1)

[Scope of utility model registration request] A temporary electric wire work vehicle comprising a suspension rope that suspends and guides temporary electric wires led out from an electric wire drum mounted on a vehicle chassis, and is equipped with a suspension rope drum that allows the suspension rope to be freely rolled out and wound. A guide roller that guides the suspension rope and applies tension to the rope and a guide device for the temporary electric wire are arranged vertically, and the upper end of the swinging arm held at the lower end is swung to a fixed part on the vehicle chassis. The suspension rope drum is rotatably supported and is rotatably supported by the suspension rope drum, which is rotatably supported by the suspension rope and can be freely retracted by letting out the suspension rope on the swing arm. a drum stopper pin configured to adjust the tension applied to the suspended rope by the pressure of hydraulic pressure supplied to the cylinder, and further fixes the suspension rope drum to the swing arm in a non-rotatable manner; A hanging rope tension holding device for a temporary electric wire work vehicle, characterized in that a pressure switch for preventing pressure reduction is provided on the pressure port side of the telescoping hydraulic cylinder.