JPS6141374Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a fishing wheel for cable laying.

Generally, this type of fishing wheel consists of a pair of side frames and rollers rotatably supported by these side frames, and the cable to be laid is stretched and laid while engaging with these rollers. Ru. However, in this conventional fishing wheel, the rollers can rotate in both forward and reverse directions, so when the cable comes to a standstill while being stretched, the weight of the cable causes the fishing wheel to rotate in the opposite direction, causing the cable to move in the direction in which it runs. The cable may be pulled back in the opposite direction, making the cable extension work troublesome and potentially endangering workers by pulling back the cable. Therefore, although the fishing wheel can rotate in the direction in which the cable runs, it is required to prevent the fishing wheel from rotating in the opposite direction due to the weight of the cable and pulling the cable back. For this reason, it is conceivable to provide a reversal prevention means such as a cam clutch on the roller, but the cam clutch is expensive and has a complicated structure, and the direction in which the fishing wheel is installed is such that the direction in which the cable extends is in the normal rotation direction of the roller. This has the disadvantage that handling is troublesome because it must be set so that

The purpose of this invention is to eliminate the tension of the cable and prevent the fishing wheel from rotating in the opposite direction, so that the cable can be extended safely and easily, and it can be installed in any direction. To provide a fishing wheel for cable laying that is easy to handle, has a simple structure, and can be assembled at low cost.

Embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 4 show a cable laying fishing wheel 10 of the present invention, which has a pair of side frames 12, 1.
2' and a roller 16 rotatably supported by a shaft 14 between these side frames. Side frame 1
2, 12' have L-shaped extensions 12a, 12'a which approach each other in their upper parts and are fixed to each other by bolts 18 and nuts 20. One extension part 12a is the horizontal part 12b
A hanging tool 22 for suspending the fishing wheel 10 from a messenger wire is fixed to this horizontal portion.

An internal gear 24 is integrally formed on one side of the inner peripheral surface of the roller 16, and first and second pawls 2
A bifurcated stopper 28 having pins 6 and 26' is attached to a pin 3 on the inner surface of the side frame 12 on the side facing the internal gear 24.
It is pivoted at 0. The first pawl 26 is the internal gear 2
4, the second pawl 26' is formed to allow rotation in one direction (counterclockwise in FIG. 2) but inhibit rotation in the other direction (clockwise in FIG. 2), and the second pawl 26' When it meshes with the gear 24, it allows rotation in the other direction, but
It is formed to suppress rotation in one direction.

As shown in FIGS. 2 and 4, the stopper operating means 32 includes a spring receiver 3 having a long hole 36a through which a pin 34 passing through the long hole 12c of the side frame 12 passes.
6 and both ends of the stopper 28, the spring 38 biases the pawls 26, 26' of the stopper 28 to the stopper inoperative position away from the internal gear 24;
38' and an operating lever 40 which is pivotally supported on the outer surface of the side frame 12 by a pin 30 and connected to the stopper 28 by this pin. Note that the pin 34 is fixed to the lower end of this operating lever 40. A ball snap 42 is provided between the operating lever 40 and the side frame 12 for holding the operating lever 40 in an intermediate position shown in FIG. 1 and two outer positions swinging on either side thereof.

Therefore, when the operating lever 40 is in the intermediate position shown in FIGS.
26' does not mesh with the internal gear 24, so the roller 16
can freely rotate in both directions, but if the operating lever 40 is tilted, for example, to the right in FIG.
The pawl 26 meshes with the internal gear 24, allowing the roller 24 to rotate counterclockwise in FIG. 2, the second pawl 26' engages the internal gear 24, allowing the roller 24 to rotate clockwise in FIG. 2, but inhibiting it from rotating counterclockwise. In this way, the roller 16 can be rotated in one direction, either left or right, depending on the inclination of the operating lever 40, so there is no need to consider the direction in which it is attached, making it easy to handle. Furthermore, the second
In the drawings and FIG. 3, reference numerals 44 and 44' indicate stopper pins that protrude from the inner surface of the side frame 12 to regulate the final position when the stopper 28 is tilted leftward or rightward.

According to the present invention, as mentioned above, the rollers of the fishing wheel are rotated in the direction of cable extension, but a stopper is provided to prevent them from rotating in the opposite direction. There is no need to pull back the cable that has been removed, so the cable can be extended efficiently and the work can be carried out safely.
In addition, since there is no pulling back or re-extending the cable, there is no damage to the cable, and the fishing wheel applies a certain amount of back tension when extending the cable, and the fishing wheel can be installed in either direction. Since it can be easily handled, it has a simple structure, and there is no need to use expensive parts such as a cam clutch, so it has the practical advantage of being able to be assembled at a low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a fishing wheel for cable installation according to the present invention, and FIGS. 2 to 4 are an enlarged side view, an enlarged sectional view, and an exploded perspective view of the fishing wheel shown in FIG. 10... Fishing wheel, 12, 12'... Side frame, 14...
...Shaft, 16...Roller, 24...Internal gear, 2
6, 26'...first and second claws, 28...stopper, 32...stopper operating means, 38,38'
...Spring, 40...Operation lever.

Claims (1)

[Claims for Utility Model Registration] (1) A fishing wheel for cable laying consisting of rollers rotatably supported by a pair of side frames, an internal gear formed on the inner circumferential surface of the roller, and an internal gear formed on the inner circumferential surface of the roller; a bifurcated stopper that is pivotally supported on the inner surface of the side frame on the side facing the gear and has two claws that mesh with the internal gear to allow rotation in one direction but suppress rotation in the other direction; a stopper operating means for moving between a stopper non-operating position where one or both pawls of the bifurcated stopper are separated from the internal gear and a stopper operating position where either pawl meshes with the internal gear; A fishing wheel for cable laying, which is characterized by: (2) The stopper operation means includes two springs that bias each pawl of the stopper away from the internal gear, and a spring that is pivotally supported on the outer surface of the side frame and connected to the stopper through the side frame. The fishing wheel for cable laying according to claim 1, further comprising an operating lever for moving the stopper to any stopper operating position against a spring.