JPS6138344Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cable guide roller for a cable feeding device or the like.

When laying a cable in a conduit or tunnel, a cable feeding device is generally used, and the cable guide roller of this feeding device has a structure as shown in FIG.

That is, the bracket 2 is provided on the pedestal 1,
A guide shaft 3 is fixed to this bracket 2.

This guide shaft 3 has a pair of guide roller fixed shafts 4,
4 is inserted through the lower end thereof, and the upper end thereof is screwed onto the screw shaft 5.

The screw shaft 5 is rotatably fixed to the bracket 2, and screws 6 and 7 are installed in left and right opposite directions from the center of the screw shaft 5.
is engraved.

Further, an adjustment handle 8 for rotating the screw shaft is attached to one end of the screw shaft 5.

Guide rollers 10, 10 are fixed to the free ends of the guide roller fixing shafts 4, 4, which are screwed onto the screw shaft 5 and inserted through the guide shaft 3, via bearings 9, 9.

Therefore, in order to adjust the interval between the guide rollers 10, 10 according to the outer diameter of the cable 11, the screw shaft 5 is rotated by rotating the adjustment handle 8 clockwise or counterclockwise. Since the shaft 5 is provided with screws 6 and 7 in opposite left and right directions, the guide roller fixing shafts 4 and 4 screwed onto the screw shaft 5 move away from each other or toward each other on the guide shaft 3. slide in the direction.

Since the guide rollers 10, 10 are fixed to the free ends of the guide roller fixed shafts 4, 4, they move in the horizontal direction as the fixed shafts 4, 4 move.
The structure is such that the interval between opposing guide rollers 10, 10 is adjusted.

However, with the guide rollers having the above structure, it is troublesome to manually adjust the distance between the guide rollers 10, 10.

In other words, when laying a cable, a towline is generally connected to the tip of the cable, but the outer diameter of the towline, the outer diameter of the connection part between the cable and the towline, and the outer diameter of the cable are different from each other. diameter, the drive of the cable feeding device must be stopped immediately before the cable passes through the guide rollers 10, 10, and the distance between the guide rollers 10, 10 must be manually adjusted according to the above-mentioned outer diameter. The complexity of the work cannot be avoided.

The present invention was developed based on the above-mentioned circumstances, and can be adjusted automatically without manual intervention by following the outer diameter of the cable passing through the gap between the guide rollers or the outer diameter of the connection part with the towline. An object of the present invention is to provide a cable guide roller characterized by the following features.

An embodiment of the present invention will be described below with reference to the drawings.

2 and 3, a pair of guide rollers 20, 20 are fixed to guide roller fixed shafts 14, 14 via bearings 19, 19, and one end of these fixed shafts 14, 14 is connected to a fan-shaped gear 21, 21
is erected on the outer periphery by nuts 22, 22.

The sector gears 21, 21 are fixed to fulcrum shafts 23, 23, and one ends of the fulcrum shafts 23, 23 are fixed to the bracket 12 with nuts 24, 24.

The sector gears 21, 21 are configured to mesh with each other on their outer circumferential surfaces and rotate at a constant angle about the fulcrum shafts 23, 23.

Projecting ends 14a, 14 of guide roller fixed shafts 14, 14 located on the back side of sector gears 21, 21
a is connected to the bracket 12 via coil springs 25, 25.

That is, pins 26, 26 are provided upright on the bracket 12, and one ends of the coil springs 25, 25 are connected to the pins 26, 26.
A position 26 is provided at a position where the guide rollers 20, 20 are pressed against each other under the tension of the springs 25, 25.

In the above configuration, considering the effect when the outer diameter of the tapered tow rope connected to the cable 11 increases in the radial direction with time, the guide rollers 20, 20 will move as the cable 11 advances. , fulcrum shafts 23, 23 together with sector gears 20, 20
Rotate around the center. When stopping at the maximum outer diameter D _n of the towline or connection part and then reducing the diameter to the outer diameter of the cable 11, the guide rollers 20, 20 and the sector gears 21, 21 are moved in the opposite direction to the above. It rotates and stops at the position of the outer diameter D _p of the cable 11.

As explained above, according to the present invention, the spacing between the guide rollers is automatically adjusted according to changes in the outer diameter of the tapered towline or the connection part between the tapered towline and the cable. The complexity of manual adjustment work can be prevented, and the efficiency of cable installation work can be improved. Moreover, due to this structure, the center of the cable never goes out of order.

The pressing force can be adjusted by using coil springs of appropriate strength for pressing the guide rollers against each other.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional cable guide roller, Figs. 2 and 3 show the structure of the cable guide roller of the present invention, and Fig. 2 is a plan view thereof.
FIG. 3 is a front view thereof. 12... Bracket, 14... Guide roller fixed shaft, 20... Guide roller, 21... Fan-shaped gear, 23... Fulcrum shaft, 25... Coil spring.

Claims (1)

[Scope of utility model registration request] A pair of fan-shaped gears rotatably attached to a bracket, a pair of opposing guide rollers installed around the outer circumference of the gears, a guide roller fixed shaft that supports the guide rollers, and a fixed shaft and a bracket. A cable guide roller, characterized in that it has an elastic means interposed between the cable guide rollers and applying a pressing force to the guide rollers.