JPS5951203B2 - How to form a cable snake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a snake in a cable when the cable is laid in a trough.

In cable installation, in order to absorb thermal expansion and contraction of the cable, an offset is taken at the manhole section, or the cable is installed by snake inside a tunnel.

Conventionally, the cable snake installation method is to install receiving rollers in advance in a tunnel, guide the cable on the receiving rollers, draw the cable into the tunnel or pit, lift it manually into the trough, and then remove the cable. The snake formation work is performed sequentially starting from the end.

Since the snake is formed manually using a hydraulic cable bender or the like, the work is troublesome and time-consuming, requires a great deal of labor, and has the disadvantage of poor work efficiency.

In particular, as the capacity of cables increases, it becomes increasingly difficult to do so, and when the cables are of large size and have ultra-high voltages, it is impossible to do it manually.

In view of these points, the present invention aims to provide a method for forming a snake in a cable by which a snake can be easily formed. The two movable bodies are pivoted in opposite directions to the cable running direction, with one engaging a long hole and the other pivoting on a slider that swings on an axis perpendicular to the cable running direction. A snake forming device is connected by a board attached to the cable, and is configured to pass the cable through a cable guide roller and form a snake on the cable by the swinging of the cable swinging body.
A wheel running on the trough is provided, and after passing the cable laid in the trough through the cable guide rollers, the cable rocker is actuated to bend the cable to one side, and then the snake forming device is used to bend the cable to the other side. The present invention is characterized in that the cable is run on a trough until it reaches a bending position, and the cable oscillator is operated in the opposite direction to the previous direction to bend the cable, thereby sequentially forming a snake.

Hereinafter, the present invention will be described in detail based on the drawings. 1.
1 is a parallel frame, and both frames 1.1 is a reinforcing rod 2.
Two shaft rods 3, 3 are installed between the frame 1.1 in a direction orthogonal to the frame 1.

Sliders 4, 4 are slidably provided on the shaft rods 3, 3, and the ends thereof extend outward from the sliders 4, 4 between the sliders 4, 4. The substrate 5 is swingably provided with one shaft 42 engaged with the elongated hole 51 and the other pivoted on the pivot shaft 41, and at both ends of the substrate 5 are rocking bodies 6 that swing around the pivot shaft 7. ,6
is pivoted so that it can swing freely.

The base end portions of the rocking bodies 6, 6 extend laterally, and the extending portion 8
, 8, the cylinder 9 is pivoted, the main body 9a of the cylinder 9 is pivoted to the extension 8 of one of the oscillators 6, and the piston rod 9b of the cylinder 9 is pivoted to the extension 8 of the other oscillator 6. The pivot portion is slidably provided in the long groove 9C, and the swinging bodies 6, 6 swing about the pivot shaft 7 as the piston rod moves back and forth as the cylinder 9 operates.

The rocking device for the rocking bodies 6, 6 is not limited to the cylinder as described above.

Two pairs of rotatably supported guide rollers 10.11 are attached to the lower surface of each of the rocking bodies 6, 6 so as to face downward.

The guide rollers 10 and 11 are provided as a pair facing each other, and the cable C is passed between the guide rollers 10 and 11.

According to the cable snake forming device 16 as described above, when the cylinder 9 is actuated, its piston rod 9b
The proximal end extension 8 of the rocking body 6 is pulled or pushed as the rocking body 6 moves forward and backward. When the cable C is inserted into the passage of the cable C between the opposing guide rollers 10.11 and the oscillator 6 is actuated to contract the piston rod 9b of the cylinder 9, the oscillator 6 moves the cable C into the first position. In Figure 1, one bend of the snake is formed by tilting it around the pivot axis 7 so as to push it upward and bend it.

Therefore, wheels 13.13 are installed on the cable snake forming device 16 via the support shaft 12 so that the wheels 13.13 can run freely, and the wheels 13.13 are placed on the trough 14 as shown in FIG. Cable C installed in the trough 14
, the guide rollers 10.11 of the snake forming device 16
After passing through the passageway between the cables, the snake former 16 is actuated to bend the cable to one side, and the snake former 16 is then run over the trough 14 to a position where the cable pull is bent in the opposite direction, causing the cable to oscillate. Move the moving object in the opposite direction to bend the cable.

In this way, snakes are formed in the cable C in the trough 14 one after another.

In this case, the guide rollers 10.11 of the snake forming device move along the snaked cable, and the oscillators 6, 6 are attached to the base plate pivotably mounted on the slider 4°4. 5, the guide rollers 10.11 can be easily moved along the snaked cable.

It is preferable for the cable snake forming device 16 to run on the trough 14 by positioning the wheels 13 on the side wall 14a of the trough 14 as shown in FIG. , if there are no other problems, the vehicle may run within the trough 14.

In addition, 15 in FIG. 4 is an electric roller or receiving roller used when laying the cable C.

As described above, according to the cable snake forming method of the present invention, a cable snake forming device 1 running on a trough is provided.
After inserting the cable C laid in the trough into the passage of the cable C between the guide rollers 10 and 11 of 6, the cable snake forming device 16 is activated to bend the cable, and then the cable runs to the next cable bending position. Since the snake can be easily formed on the laid cable C by bending the cable by activating the snake forming device in the same way, the work can be done efficiently and easily without requiring much labor as in the past. This makes it easy to work with as the cable size increases.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view, FIG. 2 is a side view, FIG. 3 is a bottom view, and FIG. 4 is a sectional view taken along the line A--A in FIG. 1...Frame, 3...Shaft rod, 4...Slider, 5
... Board, 6... Oscillator, 7... Axis, 8...
Cylinder, 10.11... Guide roller, 41...
Axis, 51...long hole.

Claims (1)

[Claims] 1. Two cable oscillating bodies with cable guide rollers at both ends and a oscillating shaft at one end are connected to a slider that slides on an axis perpendicular to the cable running direction in opposite directions to the cable running direction. The snakes are connected by a base plate, one of which engages with a long hole and the other of which is pivotally mounted so as to be swingable, and the cable is passed through a cable guide roller so that a snake is formed in the cable by the swinging of the cable swinging body. The forming device is provided with wheels that run on the trough, and after passing the cable laid in the trough through the cable guide rollers, the cable rocking body is actuated to bend the cable to one side, and then the snake forming device is moved to the next. The cable snake is characterized in that the cable is run on a trough to a position where the cable is bent in the opposite direction, and the cable oscillating body is operated in the opposite direction to the previous direction to bend the cable to sequentially form a snake. Formation method.