JPS6113129Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cable bender that forms a snake in a cable when laying the cable in a tunnel.

In order to absorb thermal expansion and contraction of the cable, the cable is laid by taking an offset at the manhole section or by snakeing the cable in a tunnel, but one way to form this snake is to use a cable bender. There is.

Conventionally, a cable bender as shown in FIG. 1 has been used. This includes a bifurcated arm 1, 1 having a cable support 2 at its tip,
a hydraulic cylinder 3; and the hydraulic cylinder 3
The cable retaining ear 5 at the end of the plunger shaft 4 is fixed to the end of the plunger shaft 4. The cable C is fixed at the center of the cable C located between the two arms 1, 1, and the plunger shaft 4 is pulled and moved by the cylinder 3, thereby bending and deforming the cable C as shown in FIG.

However, the cable bender is Y-shaped;
Since it has a shape that spreads out on three sides, it is not easy to take it in and out of a narrow sinus canal, and it is also difficult to form a snake in a narrow sinus canal.

Therefore, a cable bender as shown in FIG. 2 has been proposed to solve the above-mentioned drawbacks. In the figure, reference numerals 6 and 6 indicate arms, and cable support portions 7 and 8 are provided at both ends of the arms so as to face each other in opposite directions. A connecting bar 9 has one end pivotally connected to one arm 6 and the other end pivotally connected to the other arm 6, thereby rotatably connecting the arms 6, 6.

10 is a cylinder located between the arms 6, 6, the cylinder body 10a is pivotally connected to one arm 6, and the plunger shaft 10b is connected to the other arm 6.
The arms 6, 6 can be moved about pivots 11, 12 by actuation of the cylinder 10. Further, the cylinder 10 has a connecting pipe 1.
A hydraulic pump (not shown) is connected through 3.

The cable is bent by attaching the cable bender to the cable C as shown in FIG.
0 is operated by a hydraulic pump, the arms 6, 6
The ends of the arms 6, 6 are pulled or pushed.
oscillates. At this time, since the cable C is supported by the cable support parts 7 and 8 of the arm 6, the cable C is bent by the swinging of the arms 6 and 6.

However, even in the cable bender shown in FIG. 2, the connecting bar 9 does not move and the arms 6, 6 located at both ends of the connecting bar 9 only swing, so that the snake is not formed smoothly and the arm 6 does not move.
The rocking required a large amount of power and stroke, making it difficult to use in narrow tunnels.

In view of these points, the present invention aims to provide a cable bender that is small in size, can smoothly form a cable snake with a small stroke, and can be easily worked even in narrow tunnels. A rocking body is pivotally connected to each end via a shaft rod so as to be freely rockable, and a cable support portion is provided protruding from the lower surface of the support base and the rocking body, and is perpendicular to the longitudinal direction of the rocking body from one side of the rocking body. A cylinder is connected between the two arms through a plunger shaft, and links of the same length that intersect at the same rate centering on the pin are connected with one end at a suitable position on the support base. It is characterized in that it is slidably engaged with guide grooves provided at mutually symmetrical positions, and the other end is pivotally connected at mutually symmetrical positions of the plunger shaft of the cylinder.

The present invention will now be described in detail with reference to the embodiment shown in Figs.

In the figure, reference numeral 21 denotes a support base, and cable support portions 25 are provided on the lower surface of both ends thereof. 2
Reference numeral 2 denotes a rocking body, and cable support portions 26 are provided on the lower surface of both ends of the rocking body.

As shown in FIG. 5, the cable support parts 25 and 26 are curved in an arc shape that substantially coincides with the outer circumferential surface of the cable C, and the surfaces in contact with the cable C have a semicylindrical cross section that is an arcuate convex surface. The contact body 27 is provided with one or opposing contact bodies 27 protruding downward.

A shaft rod 24 extends in the axial direction from one end of the rocking body 22, and its ends are swingably connected to both ends of the support base 21 by respective pivot shafts 23,
Further, from one side of the rocking bodies 22, 22, the arm 2 is moved in a direction perpendicular to the longitudinal direction of the rocking bodies 22.
8 is provided protrudingly, and between the arms 28, 28, a double-acting cylinder 29 is connected to the plunger shafts 30, 3.
0 is pivotally attached to the arm 28. Although not shown, a hydraulic pump is connected to the cylinder 29.

Reference numerals 31 and 32 are links of the same length that intersect at the same rate around the pin 33, one end of which is slidably fitted into guide grooves 34 and 35 provided at symmetrical positions on the upper surface of the support base 21, and the other end is The plunger shafts 30, 30 of the cylinder 29 are pivotally connected to mounting brackets 36, 36 fixed at symmetrical positions.

Therefore, when the cylinder 29 is actuated and the plunger shafts 30, 30 are pulled, the arms 28, 28 are also pulled, the swinging bodies 22, 22 are rotated around the pivot 23, and the links 31, 32 are also pulled along the plunger shaft. 30 and 30 operate so as to approach each other integrally around the pin 33, pushing up the support base 21 upwards, and when the cylinder 29 moves back, the arms 28 and 28 are also pushed by the plunger shafts 30 and 30, and the swinging body 22 , 22 and the links 31, 32 operate in the opposite direction to the previous one and are restored.

Therefore, when forming a cable snake, the cable bender is attached to the straight cable C, and the support base 21 and the rocking bodies 22, 2 are attached.
2, and then the cylinder 29 is operated by a hydraulic pump (not shown) to connect the plunger shafts 30, 3.
0 into the cylinder 29, the arms 28, 28 of the rocking bodies 22, 22 are pulled, so the rocking bodies 22, 22 rotate around the pivot 23, and the support base 21 also moves into the link 3.
1 and 32, the cable C is supported by the cable support parts 25 and 26 and bent as the rocking bodies 22 and 22 rotate and the support base 21 moves, and the cable C is bent as shown in FIG. A snake is formed in C.

As described above, in the present invention, in addition to the rotation of the rocking body 22, the support base 21 is also moved by the links 31 and 32, so that the cable can be bent smoothly with a small force, and the overall vertical width can be reduced. Since it can be miniaturized, it can be easily used in narrow tunnels.

[Brief explanation of the drawing]

Figs. 1 and 2 are schematic plan views showing a conventional cable bender, Figs. 3 to 5 show an embodiment of the present invention, Fig. 3 is a plan view thereof, and Fig. 4 shows its operating state. The plan view shown in FIG. 5 is a side view of the cable support section. 21... Supporting base, 22... Rocking body, 24...
Shaft rod, 25, 26... Cable support part, 28...
Arm, 29... cylinder, 31, 32... link, 34, 35... guide groove.

Claims (1)

[Scope of utility model registration request] The oscillating bodies are pivotally connected to each other via shaft rods at both ends of the supporting base, and a cable support portion is provided protrudingly from the lower surfaces of the supporting base and the oscillating body, and a cable support portion is provided protrudingly from one side of each of the oscillating bodies. Arms are respectively provided protruding in a direction perpendicular to the direction, a cylinder is connected between the arms through a plunger shaft, and links of the same length are intersected at the same rate around a pin, with one end attached to the support base. A cable bender, characterized in that the cable bender is slidably engaged with guide grooves provided at appropriate positions symmetrically with each other, and the other end is pivotally connected at mutually symmetrical positions on the plunger shaft of the cylinder.