JPH0245255Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is applicable to cables that rotate (i.e., rotate, turn, spirally deform, etc.) during the manufacturing process or installation process of power cables, etc. related to a device for preventing

(Prior Art) Generally, in the manufacturing process and installation process of power cables, various processing and operations are performed while the cables are running. In this case, the cable tends to rotate due to its own rotational force or external force.

A notable example of this rotating motion is when forming an SZ wire shield on a cable core during the manufacturing process of power cables. SZ
A wire-shielded cable has a metal shielding layer for electromagnetic shielding by wrapping a large number of wires around the core.The wires are wrapped around the core in an S-shape (right It is wound alternately in a Z-shape (left-handed winding state) and a Z-shape (left-handed winding state). In such an SZ wire-shielded cable, the wires are wound alternately in opposite directions, which increases the external force (wire-wrapping force) and the own turning force, making it easier for the cable to turn.

When the cable rotates, problems such as the wire loosening after winding occur. For this purpose, the cable manufacturing apparatus is provided with a rotation stop mechanism.
The anti-rotation mechanism is configured such that, for example, a pair of rollers or a caterpillar is brought into pressure contact with the cable from both sides in the diametrical direction.

(Problems to be Solved by the Invention) However, the roller of the conventional anti-rotation mechanism is made of metal, and the cross-sectional shape of the outer peripheral surface of the roller is recessed in an arc shape corresponding to the outer peripheral shape of the cable. With this structure, the contact range between the cable and the roller in the cable circumferential direction can be set to be relatively large for a cable of a specific diameter, but the contact range becomes narrower for cables of different diameters. Therefore, for cables of different dimensions, it is necessary to replace the rollers with ones of different specifications, which lowers the overall working efficiency and increases the cost of the rotation stopper mechanism.

On the other hand, in the above-mentioned caterpillar method, since the caterpillar is pressed against the cable over a certain range in the longitudinal direction of the cable, the same caterpillar can be used even if the cable diameter changes, which overcomes the drawbacks of the roller method. . However, the caterpillar method has a complicated structure and therefore has the problem of high cost. Further, since the caterpillar presses against the cable in a state close to line contact, there is a problem in that the cable is deformed into a flattened shape if the pressure contact force is large.

(Means for solving the problem) In order to solve the above problem, the present invention adopts a tire structure similar to or the same as a general vehicle tire in place of the conventional metal roll. Specifically, it is structured as follows.

That is, in the present invention, at least one anti-rotation mechanism is provided in a conveyance path for conveying a long object in its longitudinal direction, and a pair of anti-rotation mechanisms are provided on the anti-rotation mechanism, which press against the elongated object from both sides in the diametrical direction. A tire structure is provided to be rotatable, and the tire structure is formed of a hollow rubber annular body having a sealed air chamber inside, and the support shaft of the tire structure is connected to the rotation of the tire structure. Supported by a frame in a state where the center line is perpendicular to the longitudinal direction and parallel to each other,
At least one support shaft of a pair of tire structures is attached to the frame so as to be movable in a direction perpendicular to the center line and parallel to the diametrical direction, and the at least one support shaft is movable. It is characterized by providing a positioning mechanism for positioning in a certain direction.

(Function) According to the above structure, the tire structure comes into pressure contact with the cable, thereby applying an anti-rotation force to the cable. In the press-contact state, the tire structure deforms elastically, so that the contact area between the tire structure and the cable increases. Moreover, the surface pressure of the contact portion is also made relatively uniform over the entire contact range. Therefore, rotation of the cable is effectively prevented, and deformation of the cable into a flattened state is also prevented.

When cables with different diameters are fed into the conveyance path, there is no need to replace the tire structure; just adjust the position of the support shaft using the positioning mechanism, and each tire structure can be press-fitted with the new cable in the specified state. can be done.

(Example) In the apparatus shown in FIG. 1, the cable C is continuously conveyed in its longitudinal direction. Two anti-rotation mechanisms 1 and 2 are provided near the conveyance path through which the cable C passes. The anti-rotation mechanisms 1 and 2 each include a pair of tires 5 and 6 that press against the cable C from above and below and from left and right.
The tires 5 and 6 have the same structure and are composed of general vehicle tires. Specifically, they are hollow rubber annular bodies attached to the wheel part, and a sealed annular body inside. An air chamber is formed. Therefore, when the tires 5, 6 are brought into pressure contact with the cable C, the tires 5, 6 are elastically deformed at the pressure contact portions, and the tires 5, 6 are brought into pressure contact with the cable C over a relatively wide area. Moreover, the pressure contact force is distributed relatively evenly in each pressure contact portion.

Next, the specific structure of the rotation stop mechanisms 1 and 2 will be explained.

The anti-rotation mechanism 1 has a vertically long bearing housing 7.
(frame). The lower end of the bearing housing 7 is fixed to a pedestal 8 at the bottom of the device. Vertical guide rails 9 are attached to both sides of the upper and lower parts of the bearing housing 7, respectively.
Each pair of guide rails 9 has a slide block 1.
0 is supported so that it can move up and down. The slide block 10 is housed inside the bearing housing 7 and includes a nut portion 11. A common vertical screw shaft 12 is screwed into the nut portions 11 of both slide blocks 10. Both nuts part 1
The direction of the screw thread in the first screw hole is opposite, so by turning the screw shaft 12, both slide blocks 10 move toward or away from each other. The screw shaft 12 projects upward from the bearing housing 7, and a handle 13 for rotational operation is attached to the projecting end thereof.

A horizontal tire support shaft 15 is rotatably attached to each slide block 10. Tire support shaft 1
5 extends perpendicularly to the longitudinal direction of cable C,
A wheel portion of the tire 5 is fixed to a portion projecting leftward in FIG. 1 from the guide rail 9, respectively. Both tires 5 are located above and below the cable C.

The anti-rotation mechanism 2 has the same basic structure as the anti-rotation mechanism 1, except for the installation orientation. That is, the bearing housing 7 of the rotation stop mechanism 2
extends horizontally and in a direction perpendicular to the longitudinal direction of the cable C, and is connected to the bearing housing 7 of the anti-rotation mechanism 1.
It is fixed to the pedestal 8 via other frame members. Further, the tire support shaft 15 of the tire 6 is vertical, and the tire 6 holds the cable C from both left and right sides.

In the apparatus of the embodiment, as shown in FIG. 2, which is a schematic diagram in the direction of the - arrow in FIG.
A total of two horizontal anti-rotation mechanisms 2 are provided between them. Furthermore, small guide rolls 17 are provided at both front and rear ends of the frame/cover assembly 16 of the entire apparatus to guide the cable C from the top, bottom, left and right. The handle 13 of the anti-swivel mechanism 1 is located above the frame/cover assembly 16, and the handle 13 of the anti-swivel mechanism 2 is located on the side of the frame/cover assembly 16.

The above-mentioned device is placed, for example, below an SZ wire strut device (not shown) and connects the tire 5,
6 prevents the cable C from rotating.

(Effects of the invention) As explained above, according to the invention, since the tires 5 and 6 (tire structure) are used as members to be pressed against the cable C, the area of pressure contact with the cable C is improved and the pressure contact force is made uniform. Cable C
It effectively prevents rotation of cable C.
can be prevented from becoming flat.

Also, even if the diameter of cable C changes somewhat due to the use of tires 5 and 6,
The state of elastic deformation of 6 changes only slightly, and the state of pressure contact does not change significantly. Furthermore, in order to adjust the position of tire support shafts such as tire support shaft 15 and slide block 10, tire positioning mechanisms such as nut portion 11 and threaded shaft 12 are provided, so that even if the diameter of cable C changes significantly, However, by simply changing the positions of the tires 5 and 6, a predetermined pressure-contact state can be obtained. Therefore, there is no need to replace the tires 5, 6, and work efficiency can be improved.

Furthermore, since general vehicle tires can be used as the tires 5 and 6 of the present invention, manufacturing costs can be reduced compared to the case where dedicated caterpillars and rolls are manufactured.

(Another Embodiment) The device of the present invention can also be used as a rotation stopper for a long object other than a cable. It is also possible to provide only one anti-rotation mechanism 1 or one anti-rotation mechanism 2 in the device. In each anti-rotation mechanism 1 and anti-rotation mechanism 2, only one tire 5 or tire 6 may be configured to be adjustable in position.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of the apparatus of the embodiment, and FIG. 2 is a schematic view taken in the direction of the - arrow in FIG. DESCRIPTION OF SYMBOLS 1, 2... Anti-rotation mechanism, 5, 6... Tire (tire structure), 7... Bearing housing (frame), 9... Guide rail, 10... Slide block, 11... Nut part, 12... ...Screw shaft, 1
3... Handle (operation part), 15... Tire support shaft,
C... Cable (long item).

Claims (1)

[Claims for Utility Model Registration] (1) At least one anti-rotation mechanism is provided in a conveyance path for conveying a long object in the longitudinal direction thereof, and the anti-rotation mechanism is provided with a rotation stopper on both sides of the long object in the diametrical direction. A pair of tire structures are rotatably provided in pressure contact with each other. , supported by a frame in a state where the center line of rotation of the tire structure is perpendicular to the longitudinal direction and parallel to each other,
At least one support shaft of a pair of tire structures is attached to the frame so as to be movable in a direction perpendicular to the center line and parallel to the diametrical direction, and the at least one support shaft is movable. 1. A rotation stopper for a long object, characterized in that it is provided with a positioning mechanism for positioning in a certain direction. (2) The above-mentioned positioning mechanism is provided with a nut portion attached to the support shaft portion, a screw shaft screwed into the nut portion, and an operating portion for operating the screw shaft. The anti-rotation device for a long object according to item 1.