JPS6366128B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cable extension device, and more particularly to a device suitable for use in extending cables to wiring shelves arranged in rows.

As shown in FIG. 1, as a method for wiring cables to wiring shelves arranged in a row, a C-shaped metal fitting 14 having a cable attachment/detachment opening 12 is attached above the wiring shelf 10, and each C-shaped metal fitting 14 is The rope 16 and the cable 20 connected to the rope via the thin wire 18 are sent back and forth through the ring, and the cable 20
There is a method of inserting the wire into the ring of the metal fitting 14 and then placing it at a predetermined position on each of the wiring shelves 10.

According to this method, since the cables to be extended do not rub against each other during wiring, there is an advantage that the applied tension can be small and the work can be carried out smoothly.

However, this method has a problem in that the rope 16 and cable 20 become entangled. Another problem is that if the cable installation route has ups and downs or bends from side to side, it is difficult to move the rope smoothly.

The purpose of the present invention is to solve the above-mentioned problems of the prior art, to prevent the wire rope and cable from becoming entangled, and to make it possible to smoothly transport the rope, thereby significantly improving work efficiency. The object of the present invention is to provide a device for cable extension.

In order to achieve this object, the device of the present invention includes a pulley for guiding a rope, a cable guiding section disposed on one side of the pulley, and a cable guiding section disposed on one side of the pulley. A small sliding body is attached, and a guide rail is provided along the outer periphery of the pulley to detach the small sliding body to the guide section side, and the rope and cable are separated by this small sliding body and the guide rail during forwarding. This is to prevent them from becoming entangled.

The present invention will be explained in more detail below with reference to embodiments shown in the drawings.

FIG. 2 is a front view of a wire drawing device according to an embodiment of the present invention, FIG. 3 is a plan view thereof, and FIG. 4 is a side view thereof. Reference numeral 30 denotes a rope guide pulley, which is pivotally supported on a base plate 32 by a shaft 33, and an upper guide rail 34 and a lower guide rail 36 are disposed to sandwich the pulley 30. . The guide rails 34 and 36 are two round bars curved into a semicircular shape, and the curved portion is along the circumference of the pulley 30, and as shown in the figure, the lower guide rail 36 is at a different level from the upper guide rail 34. Note that the guide rails 34 and 36 are fixed to the base plate 32.

Reference numeral 38 denotes a cable receiving roller, which is pivotally supported by the shaft 33 and coaxially supported with respect to the base plate 32 with the pulley 30.
A cable receiving arm 40 is fixed to the lower end of the base plate 32. Also, 42,4
4 are mounting brackets, which are fixed to the base plate 32. FIG. 5 is a front view of the cable receiving and reversing arm 45, and the cable receiving and reversing arm 45 may be attached so as to surround the upper portion of the cable receiving roller 38.

A wire extending method using the apparatus configured as described above will be explained with reference to FIG. 6.

In FIG. 6, a cable 20 is connected to the rope 16 via a thin wire 18. Further, a small sliding body (spherical body) 46 is attached in the middle of the thin wire 18.
Note that FIG. 6 is an example applied to a case where the cable laying route is curved downward. Further, the width of the sphere is set smaller than the interval between the guide rails 34 and 36.

When the rope 16 is pulled and moved in the direction of the arrow, the cable 20 connected to the rope 16 via the thin wire 18 is also pulled by the rope 16 and moved. The sphere 46 is first sandwiched between the guide rails 34 and 36 and moves while sliding on the circumference between the guide rails 34 and 36.
4 and 36, the cable moves away from the guide rails 34 and 36 in the direction of the cable receiving roller 38. As a result, the cable 20 also moves onto the cable receiving roller 38. Therefore, the rope 16 and cable 20 gradually become separated from each other, and entanglement between the rope 16 and the cable 20 is prevented.

FIG. 7 shows an example in which the apparatus according to this embodiment is applied to a case where the cable laying path curves horizontally to the left. In this example as well, when the rope 16 is pulled, the sphere 18 is sandwiched between the guide rails 34 and 36 and moves while sliding on the circumference thereof, and eventually moves in the direction of the cable receiving arm 38 due to the step difference between the guide rails 34 and 36. Move, rope 16 and cable 20
They will be separated from each other and their entanglement will be prevented. In FIG. 7, reference numeral 48 is a mounting channel to which the instrument is attached by bolts 50.

8 and 9 show different embodiments of the invention. In this embodiment, the cable receiving arm 40 is provided with rollers 52 and 54.
In this way, the cable 20 will not rub against the cable receiving arm 40 directly, and will be guided even more smoothly. This embodiment is particularly suitable for application when the weight of the cable increases or when the cable laying route is curved in the vertical and horizontal directions. Of course, in this embodiment as well, entanglement between the cable 20 and the rope 16 is reliably prevented as in the previous embodiment.

As described above, according to the present invention, entanglement between the tension rope and the cable to be extended, which was a drawback of the conventional method, can be reliably prevented, and in the loop-type cable-stretching method, etc. Wire extension work can be carried out smoothly even if the wire is bent up, down, left or right. Furthermore, multiple thin cables such as control and communication cables can be laid quickly and at once, greatly improving work efficiency.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional example, Figs. 2 to 7 show an apparatus according to an embodiment of the present invention, Fig. 2 is a front view, Fig. 3 is a plan view thereof, and Fig. 4 is a Same side view,
Figure 5 is a front view showing the cable reversing arm;
7 and 7 are perspective views for explaining the wire drawing method, respectively, and FIGS. 8 and 9 are perspective views showing other embodiments of the present invention. 16...rope, 20...cable, 30...
Pulley, 34, 36...guide rail, 38...cable receiving roller.

Claims (1)

[Claims] 1. A rope for pulling a cable to be stretched, a thin wire that connects the rope and the cable, a small sliding body attached in the middle of the thin wire, a pulley that guides the rope, and one side of the pulley. and a pair of guide rails provided along the outer periphery of the pulley.
The pair of guide rails are arranged at different levels, and the guide rail on the guide side is lower than the guide rail on the side opposite to the guide part, and the interval between the guide rails is smaller than the width of the small sliding body. A cable extending device characterized by being compact.