JPH07135710A - Cable stretching car and cable stretching method using same - Google Patents

Abstract

PURPOSE:To conduct the stretching operation of a cable easily and efficiently by installing a boom device, in which a cable or a rope for traction connected to the cable is bonded with a front end, and a ladder supported by a car body in a manner that can be erected and laid. CONSTITUTION:A reel for a wind-up gear removed from the car body of a cable stretching car A is arranged rotatably near a specified strut P, and the tip of a rope R is caught to a hook for an escaping device under the state, in which the delivered rope R for traction is passed through a resisting machine 101 giving tractive resistance to the rope R. A derricking cylinder is operated, a ladder H is leaned against the strut P and an operator climbs the ladder, a safe F is installed, a boom device is operated, and the rope R is caught to the safe F. The car body is made to travel, the rope R is pulled toward and adjacent strut P, and a cable C is connected at a rear tip, and drawn by a winch being wound on the reel and caught to the safe F. Accordingly, the stretching operation of the cable is conducted easily and efficiently while the ladder need not be carried singly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable tensioning vehicle for tensioning electric wires or other cables between columns and a cable tensioning method using the same.

[0002]

2. Description of the Related Art Conventionally, in order to stretch a cable such as an electric wire between columns of a telephone pole or the like, first, a ladder is erected on a predetermined column and the ladder thus climbed is climbed to be supported on an upper portion of the column. A gold wheel as a member is attached, and a pulling rope whose rear end is connected to a cable is hooked on the gold wheel. Then, descending to the ground and pulling the rope by human power, guiding the rope to the pillar adjacent to the pillar, and carrying the ladder leaning against the pillar to the pillar guiding the rope, Lean against. Then, after climbing this ladder and attaching the gold wheel to the upper part of the support pillar, the rope is lifted from the ground to the air, and the rope is hooked on the gold wheel. After that, by repeating the above work, the rope is hooked on a predetermined number of stanchions, and the rope is manually pulled, and the cable connected to the rear end of the rope is unwound from the cable reel, and the unwound cable is laid on each strut. The attached gold wheel is hooked in sequence and bridged between the columns, and this cable is fixed to the cable fixing member attached to the columns. The gold wheel may be attached to all the columns in advance before the rope is pulled. Further, depending on the type of cable to be stretched, the cable may be directly hooked on the gold wheel and stretched without using the pulling rope.

[0003]

According to the above-described conventional cable tensioning method, every time a cable or a rope connected to the cable is hooked on a support, the cable or rope is lifted from the ground to the air or from the air to the ground. Since it is necessary to unload it, the tensioning work is complicated and requires a lot of man-hours, resulting in a problem that the work efficiency is very poor.

Further, since it is necessary to transport the ladder leaning against one of the columns to the other columns, the tensioning work is further complicated. The present invention has been made in view of the above problems, and it is an object of the present invention to provide a cable tensioning vehicle and a cable tensioning method using the cable tensioning vehicle that can perform cable tensioning work easily and efficiently. To aim.

[0005]

In order to achieve the above-mentioned object, a cable tension vehicle according to claim 1 is a self-propelled vehicle body and is mounted on the vehicle body and has a cable or a cable for towing at its tip. A boom device for connecting the ropes and a ladder supported by the vehicle body so as to be able to stand and fall.

A cable tensioning method according to a second aspect is a method of tensioning a cable between pillars standing upright at a predetermined interval by using the cable tensioning vehicle according to the first aspect. It is characterized by including the steps shown in the following. A step of attaching a supporting member, which hooks and supports a cable or a rope for towing connected to the cable, to an upper portion of a column using a ladder supported by the vehicle body. A step of running the vehicle body and pulling the cable or rope in the air while the cable or rope is connected to the tip of the boom device. A step of hooking the cable or rope on the support member while the cable or rope is held in the air by the boom device.

[0007]

According to the cable tension vehicle according to claim 1,
By moving the vehicle body with the boom device raised, the cable or rope connected to the tip of the boom device can be pulled in the air. Further, the cable or rope can be held in the air by the boom device and can be hooked to the column in sequence. Further, using the ladder, it is possible to attach a supporting member for hooking a cable or a rope to the upper part of the column, or hook a cable or a rope on the supporting member.
Moreover, since the ladder is supported by the vehicle body, the ladder can be transported while pulling the cable or rope.

According to the cable tensioning method of the second aspect of the invention, the cable or the rope for towing connected to the cable is towed or hooked on the column while always being held in the air. There is no need to repeat the work of lifting in the air or lowering it to the ground.

[0009]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 1 and 2 are perspective views showing an embodiment of a cable tension vehicle A of the present invention. The cable-stretched vehicle A connects a self-propelled vehicle body 1, a boom device 2 mounted on the vehicle body 1, and a towing rope R that is provided at the tip of the boom device 2 and that is connected to a cable C. , The dodging device 3 that allows the rope R to pass through the air obstacle D (see FIG. 14) that crosses the stretched space B of the cable C, and the ladder H mounted on the vehicle body 1 can be erected, collapsed, and stored. The main portion is constituted by the ladder supporting means 4 which is supported by the.

The self-propelled vehicle body 1 is self-propelled by orbiting a crawler 11 by a driving source such as an engine or a motor, and an operation for operating traveling of the vehicle body 1 is provided at a rear portion thereof. A section 12 is provided. The boom device 2 includes an undulating boom 2 rotatably connected to an upper portion of a boom post 20 that is erected on the vehicle body 1 via a swivel base.
1, a telescopic boom 22 that is removably introduced to the tip side of the undulating boom 2 (see FIG. 3), and a bending boom 23 that is rotatably connected to the tip of the telescopic boom 22. . A hoisting cylinder 24 for raising and lowering the hoisting boom 21 is provided on the rotation base side of the hoisting boom 21. Further, the telescopic boom 22 can be caused to protrude a predetermined stroke from the tip of the hoisting boom 21 by a telescopic cylinder (not shown) built in the hoisting boom 21. Furthermore, the refraction boom 2
3 is integrally rotatably fixed to a rotary shaft S1 of a hydraulic rotary actuator 25 attached to the distal end of the telescopic boom 22. By rotating the rotary shaft S1, it is bent at an arbitrary angle. (See FIG. 5). The hoisting operation of the hoisting boom 21, the telescopic operation of the telescopic boom 22, and the bending operation of the bending boom 23 are performed as follows.
It can be operated by the operation unit 26 attached to the boom post 20. In addition, the above boom post 2
The inside of 0 is configured as a tank for storing hydraulic oil.

The dodging device 3 can be remotely operated by the operating portion 26 attached to the boom post 20. As shown in detail in FIG. 4, a part of the outer circumference is separated by a predetermined length. The ring gear 31 includes a support frame 32 that supports the ring gear 31 so as to be rotatable about a horizontal axis, and a drive unit 33 that rotates the ring gear 31 in both forward and reverse directions. The annular gear 3
No. 1 has a tooth surface on the outer circumference,
A hook 31b for connecting the rope R for pulling the cable is attached to the opposite side of a via a shackle 31c. Further, the support frame 32 is configured such that a predetermined range of the lower half portion of the annular gear 31 is sandwiched by arcuate sandwiching members 32a from both side surfaces thereof, so that the annular gear 3 is held.
1 is rotatably held. The lower end of the support frame 32 is integrally rotatably attached to a rotating shaft S2 rotatably supported by the tip of the bending boom 23. Further, the driving means 33 transmits the driving force of the motor 33a to the pair of driving gears 33c meshed with the annular gear 31 via the chain 33b, and causes the motor 33a to rotate normally. As a result, the annular gear 31 can be rotated approximately 180 ° counterclockwise in FIG. 4 via the drive gears 33c, and the motor 33a is rotated in the reverse direction so that the annular gear 31 is reversed. Can be returned to the position. The separation length L of the annular gear 31 is set to be smaller than the arc length of the holding member 32a.
1 is rotated, the annular gear 31 holds the holding member 3
It can be always held by 2a. Further, the annular gear 31 is usually arranged such that the cut-off portion 31 a thereof faces the front of the vehicle body 1.

The dodging device 3 is posture-controlled by the posture control mechanism 5 so as to maintain a constant posture regardless of the hoisting angle of the hoisting boom 21 and the refraction angle of the bending boom 23. The posture control mechanism 5 causes the support frame 32 of the dodging device 3 to rotate about the rotation axis S2 according to the hoisting angle of the hoisting boom 21 and the hoisting angle of the bending boom 23.
By rotating it around, the dodging device 3 is maintained in a standing posture in which the annular gear 31 is located above the support frame 32, and as shown in FIGS. 5 and 6,
A first sprocket 51 that is provided concentrically with the rotation axis S3 of the hoisting boom 21 and that is turned along with the turning of the hoisting boom 21 and a second sprocket that is rotatably supported by the boom post 20. 52, a third sprocket 53 provided in the middle portion of the hoisting boom 21 so as to be movable along the longitudinal direction of the hoisting boom 21, and a fourth sprocket provided so as to be movable along with the third sprocket 53. The sprocket 54, a fifth sprocket 55 concentrically and rotatably provided at the tip of the telescopic boom 22 and concentric with the rotation axis S1 of the hydraulic rotary actuator 25, and the bending boom 23.
The rotation base of the second rotation shaft S1 is provided concentrically with the rotation shaft S1 and is rotatable, and is provided at the tip of the bending boom 23 and a sixth sprocket 56 that is integrally rotatable with the fifth sprocket 55. The seventh sprocket 57 that is integrally rotatable with the support frame 32 of the dodging device 3 around the rotation axis S2, and the first, second, and third chains E1, which are appropriately wound around the respective sprockets. It is composed of E2 and E3.

The base end E1a of the first chain E1
Is fixed to the first sprocket 51, and in a state in which the first sprocket 51 is substantially half-turned around the first sprocket 51, the second sprocket 52 is wound around the third sprocket 53. E1b is fixed to the rear end of the telescopic boom 22. Further, the second chain E2 has its base end portion E2a fixed to the fifth sprocket 55, and the third chain E2 is almost 3 times larger than the fifth sprocket 55.
/ 4 lap, the fourth sprocket 54
It is wound around and folded back, and its tip end E2a is fixed to the tip end of the hoisting boom 21. Furthermore, the third
The chain E3 is wound around the sixth sprocket 56 and the seventh sprocket 57, and both ends thereof are connected to each other through chain bolts 59c. It should be noted that each of the sprockets and chains may be provided in two sets due to the necessity of strength.

According to the attitude control mechanism 5, when the hoisting boom 21 is hoisted, the third sprocket 53 is pulled through the first chain E1 according to the hoisting angle, and the fourth sprocket is pulled. Together with 54, the hoisting boom 21 is moved in the direction of the rotation axis S3. Then, the fifth sprocket 55 is rotated via the second chain E2, and along with this rotation, the sixth sprocket 56 is rotated, and the seventh sprocket 56 is rotated via the third chain E3. The sprocket 57 is rotated. As a result, the support frame 32 of the dodge device 3 is rotated about the rotation axis S2 in the direction opposite to the rotation direction of the hoisting boom 21 by an angle corresponding to the hoisting angle of the hoisting boom 21. The standing posture is maintained. On the other hand, when the refraction boom 23 is refracted, the sixth sprocket 56 is changed depending on the refraction angle.
Is rotated relative to the bending boom 23. Therefore, the seventh sprocket 57 is rotated via the third chain E3, and the support frame 32 of the dodging device 3 is rotated.
However, the bending boom 23 is rotated by an angle corresponding to the bending angle of the bending boom 23 in the direction opposite to the rotating direction of the bending boom 23, and the standing posture thereof is maintained.
The third and fourth sprockets 53, 54 are moved to the tip end side of the hoisting boom 21 as the telescopic boom 22 expands and contracts.

As shown in FIGS. 7 and 8, the ladder supporting means 4 includes a holding member 41 for holding both sides of the ladder H and having a substantially U-shaped cross section, and the holding member 41 for the first horizontal axis. The supporting frame 42 that rotatably supports around S4, the swivel base 43 that rotatably supports the supporting frame 42, and the holding member 41 and the supporting frame 42 are interposed between the holding frame 41 and the holding member 41. A hoisting cylinder 44 for hoisting and a turning mechanism 45 for turning the holding member 41 together with the support frame 42 about a vertical axis.

The holding member 41 has a receiving frame 41a rotatably supported by a supporting frame 42, and a ladder H can be inserted into the upper surface of the receiving frame 41a from the front side of the vehicle body 1. A holding frame 41b is placed. This holding frame 4
1b is a hinge 41 with respect to the side surface of the receiving frame 41a.
It is rotatably connected via c, and can be rotatably erected around a second horizontal axis S5 orthogonal to the first horizontal axis S4 which is the undulating center of the holding member 41. Further, a damper 41d is interposed between the bottom portion of the holding frame 41b and the receiving frame 41a to reduce the impact when the holding frame 41b is laid down from the upright state. At the same time, a stopper 41f for abutting and fixing the end of the ladder H is provided upright at the end of the receiving frame 41a on the side of the rotation center. Further, the stopper pin 4 for restricting the standing of the holding frame 41b is provided on one side of the holding frame 41b.
1g is provided. The tip of the stopper pin 41g is fitted into the fitting hole 4 of the standing piece 41h that is erected on the receiving frame 41a.
1i is fitted. The stopper pin 41g is biased toward the fitting hole 41i by a spring (not shown), and the stopper pin 41c is resisted against the biasing force of the spring.
The holding frame 41i by pulling out from the fitting hole 41i.
The standing of b can be permitted. Further, the swivel means 45 includes a worm gear 45a rotatably supported by the swivel base 43, a worm wheel 45b integrally rotatably attached to the support frame 42, and a handle for rotating the worm gear 45a. 45c (see FIG. 1).

According to the ladder supporting means 4 having the above structure, the lower end portion side of the ladder H is held by the holding frame 41b of the holding member 41 on the upper surface of the receiving frame 41a. The lower end of the ladder H can be abutted against the stopper 41f and fixed by being inserted into the stopper 41f. Therefore, the ladder H can be received by the stopper 41f while the holding member 41 is erected by the undulating cylinder 44. In this state, if necessary, the turning means 4
By rotating the handle 45c of 5 to orient the ladder H together with the holding member 41 in a predetermined direction, the ladder H can be leaned against a pole P such as a telephone pole for use. Furthermore, by raising the holding frame 41b around the second horizontal axis S5 with the holding member 41 lying down,
By shifting the relative position between the stopper 41f and the ladder H,
It is possible to allow the ladder H to move to the rear side of the vehicle body 1. Therefore, in this state, the ladder H can be stored along the side surface of the vehicle body 1 by moving the ladder H to the rear side of the vehicle body 1 while being held by the holding frame 41b (FIG. 3). reference). In this stored state, the ladder H can be prevented from largely protruding from the front surface side of the vehicle body 1, so that the traveling operation of the vehicle body 1 can be easily performed.

When storing the ladder H, the stopper 41f may be retracted so as to allow the ladder H to move. In this case, the ladder 41 is extended from the holding member 41 to the rear side of the vehicle body 1. If there is nothing that hinders the movement of H, the holding frame 41b does not necessarily have to be rotated and erected around the second horizontal axis S5. Further, the cable tension vehicle A is provided with the hook 3 of the dodging device 3.
A traction load detection means 7 for detecting the traction load of the rope R hooked on 1b is provided (see FIG. 6). The towing load detecting means 7 outputs a signal when the hydraulic or pneumatic cylinder 71 interposed in the middle of the third chain E3 provided on the bending boom 23 and the internal pressure of the cylinder 71 reaches a predetermined level. It is composed of a pressure switch 72 for outputting. In the cylinder 71, the rear end of the cylinder tube 71a is connected to one middle end of the third chain E3, and the tip end portion of the piston rod 71b is connected to the other middle end of the third chain E3. It is connected. That is, when the seventh sprocket 57 is rotated by the moment acting on the dodging device 3 as the rope R is pulled, and the tension of the third chain E3 changes, the cylinder tube 71a and the piston rod 7
1b is relatively displaced and the internal pressure of the cylinder 71 is changed. And this cylinder 71
The internal pressure of is applied to the pressure switch 72 through the pipe 73, and when the internal pressure exceeds a predetermined value, the pressure switch 72 outputs a signal. The pressure switch 72 is set to output a signal when the traction load is, for example, 40 kgf or more.

The output signal from the pressure switch 72 is
The travel control means 8 for controlling the travel of the vehicle body 1 is input, and the travel control means 8 transmits the driving force of the drive source of the vehicle body 1 to the crawler 11 based on the output signal. The clutch 13 provided in the transmission mechanism is operated to stop the traveling of the vehicle body 1. Therefore, even when the rope R is entangled or caught while the rope R is being pulled and an excessive load acts on the tip of the boom device 2, it is possible to prevent the vehicle body 1 from tipping over.

The cylinder 71 constituting the traction load detecting means 7 may be interposed between the rope R and the hook 31b. Further, instead of the cylinder 71, the traction load may be detected by a load cell. In this case, a signal from the load cell is input and the determination means determines whether the traction load exceeds a threshold value. If it is determined that the threshold value is exceeded, a signal may be output to the traveling control means 8. Also,
When the drive source of the vehicle body 1 is a motor, the traveling control unit 8 may be a device that cuts off the power supply to the motor.

The vehicle body 1 is equipped with a winding device 9 for winding the rope R in a state where the rope R is stretched over the support column P. The winding device 9 includes a winch 91 that winds and pulls the rope R, and a reel 92 that automatically winds the rope R pulled by the winch 91. The reel 92
Is rotatably driven by a driving unit (not shown), and is detachably supported by a support frame 93 erected on the vehicle body 1. The reel 92 can be rotationally driven by rotating the lever 94 in an emergency.

An example of a cable tensioning method using the cable tensioning vehicle A having the above structure will be described in detail below with reference to FIGS. 9 to 14. First, the reel 92 of the winding device 9 detached from the vehicle body 1 is rotatably arranged in the vicinity of a predetermined support P, and the pulling rope R fed from the reel 92 is pulled by the rope R. Resistance machine 10
In the state where the rope R is passed through 1, the tip of the rope R is hooked on the hook 31b of the dodging device 3. The resistance machine 101 is composed of a pair of endless rotation belts that rotate with a predetermined rotation resistance. By sandwiching the rope between the pair of endless rotation belts, a predetermined resistance can be obtained. The rope R can be unwound from the reel 92 while being applied.
The resistor 101 is used by being fixed to the support P.

Further, before or after the work of hooking the rope R on the hook 31b of the dodging device 3 or in parallel with the work, the hoisting cylinder 44 of the cable tension vehicle A is operated, and the turning means 45 is operated if necessary. The ladder H is leaned against the support P by operating it, and in this state, the ladder H is climbed to support the support P.
Gold wheel F as a support member for hooking the rope R on the
(See FIG. 9).

Next, by operating the boom device 2, the operator climbing the ladder while the rope R is lifted in the air,
The rope R is hooked on the gold wheel F. Then, the vehicle body 1 is run, and the rope R hooked on the gold wheel F of the pillar P is held in the air and pulled toward the pillar P adjacent to the pillar P (see FIG. 10). . In the middle of this towing, when an aerial obstacle D such as a cable or a wire crosses the rope tension space B, when the dodging device 3 approaches the aerial obstacle D, the vehicle body 1 is stopped and the boom is boomed. By operating the device 2 as appropriate, the above-mentioned air obstacle D
Through the disconnecting portion 31a, the annular gear 31 of the dodging device 3
After being introduced into the interior of the gear (see FIG. 11), the annular gear 31
Rotate about 180 °. This allows the hook 31
The rope R hooked on b can be guided in the pulling direction by passing over the air obstacle D. Then, the vehicle body 1 is run again to pull out the aerial obstacle D from the annular gear 31, and the annular gear 31 is reversed to return to the original position. Further, the vehicle body 1 is run, and the rope R is attached to the pillar P. Lead to the adjacent support P.

Next, when the vehicle body 1 passes the support P,
Stop the running, lean the ladder H against the pillar P again,
The rope R climbed up this ladder H, attached the gold wheel F to the support P, and was held in the air by the boom device 2.
The worker who climbs up the ladder H hooks it on the gold wheel F (Fig. 1).
2). In the same manner as described above, the gold wheel F is attached to the predetermined number of columns P, and when the rope R is hooked on the gold wheel F (see FIG. 13), the cable C is attached to the rear end of the rope R.
And pulling the rope R by the winch 92 of the winding device 9, winding the rope around the reel 92, and passing the cable C connected to the rear end of the rope R from the cable reel C1 through the resistor 101. The cable C is extended and hooked on the gold wheel F attached to each of the columns P (see FIG. 14). After that, the cable C can be sequentially stretched between the columns P by repeating the above operation. The work of hooking the rope R on the gold wheel F may be performed not only by the worker who climbs the ladder H but also by operating the boom device 2.

As described above, according to the above cable tensioning method, the rope R is towed in the state of being held in the air and sequentially hooked on the support pillar P. Therefore, after the cable R is once lowered to the ground and manually pulled, Compared with the conventional tensioning method in which the work of climbing up the pillar P again and hooking the cable is repeated, significant labor saving can be achieved. Further, even if there is an aerial obstacle D in the cable tension space, the aerial obstacle D can be remotely operated by the dodging device 3 to dodge, so that the tensioning work can be performed more efficiently.

Further, when the rope R is entangled or caught during the towing of the rope R and an excessive towing load acts on the boom device 2, this is detected by the towing load detecting means 7, Since the traveling of the vehicle body 1 is stopped by the traveling control means, it is possible to prevent the vehicle body 1 from tipping over, and thus to ensure the safety of work.

Moreover, the ladder H is mounted on the vehicle body 1,
Since the ladder H can be carried while pulling the rope R, the work of carrying the ladder alone can be omitted. The cable-stretched vehicle A of the present invention is not limited to the above-described embodiment. For example, the vehicle body 1 may be configured to be driven by wheels instead of the crawler 11, and the boom device 2 may be undulated. The pulling device 3 is configured so that the dodging device 3 is passed from the member to which the rope R is connected to another member facing the air obstacle D therebetween. Various modifications can be made such as hooking the cable C directly between the columns P without using R.

[0029]

As described above, according to the present invention, the cable or the rope for towing connected to the cable can be sequentially hooked on the column while being pulled in the air, so that the cable or rope can be lifted in the air. It is not necessary to repeat the work of unloading to the ground, and the cable tensioning work can be performed easily and efficiently.

Since the ladder is supported by the vehicle body,
The ladder can be transported while pulling the cable or rope. Therefore, it is not necessary to separately transport the ladder, and the cable can be stretched more efficiently.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a cable tension vehicle according to the present invention.

FIG. 2 is a perspective view of the cable tensioned vehicle of FIG. 1 viewed from a side surface on the opposite side.

FIG. 3 is a side view showing a state in which the boom device is erected.

FIG. 4 is a side view showing the dodge device.

FIG. 5 is a schematic view showing an internal structure of the boom device.

FIG. 6 is a schematic view showing an internal structure of a bending boom.

FIG. 7 is a side view showing a ladder supporting means.

FIG. 8 is a front view showing the ladder supporting means.

FIG. 9 is a schematic view showing a process of attaching the gold wheel.

FIG. 10 is a schematic view showing a rope pulling process.

FIG. 11 is a schematic view showing a process of avoiding an obstacle in the air.

FIG. 12 is a schematic view showing a process of attaching the gold wheel.

FIG. 13 is a schematic view showing a state in which a rope is stretched between a predetermined number of columns.

FIG. 14 is a schematic diagram showing a rope winding step.

[Explanation of symbols]

 1 Carbody 2 Boom device 3 Dodge device 4 Ladder support means 41 Holding member 41f Stopper 7 Traction load detection means 8 Travel control means A Cable tension vehicle C Cable D Aerial obstruction F Gold wheel (supporting member) H Ladder P Support R rope

Front Page Continuation (72) Inventor Hiroshi Nakanishi 1-1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Yoshihisa Omura 1-1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph Telephone Co., Ltd. (72) Inventor Katsuhiko Takemura 1-2-23 Shinji, Wakabayashi-ku, Sendai City, Miyagi Prefecture Tohoku Communication Construction Co., Ltd.

Claims (2)

[Claims] 1. A self-propelled vehicle body, a boom device which is mounted on the vehicle body and which connects a cable or a towing rope connected to the cable to a tip thereof, and a ladder which is supported by the vehicle body so as to be able to stand and fall. A cable tensioned vehicle comprising: 2. A method for tensioning a cable by using the cable tensioning vehicle according to claim 1 between struts that are erected at a predetermined interval, comprising the following steps. Cable installation method. A step of attaching a supporting member, which hooks and supports a cable or a rope for towing connected to the cable, to an upper portion of a column using a ladder supported by the vehicle body. A step of running the vehicle body and pulling the cable or rope in the air while the cable or rope is connected to the tip of the boom device. A step of hooking the cable or rope on the support member while the cable or rope is held in the air by the boom device.