JPH0556531A - Cable feeder - Google Patents

Abstract

PURPOSE:To provide a small cable feeder which can feed a cable accurately and can enhance workability in cable laying work. CONSTITUTION:The cable feeder comprises a pair of resilient rollers 11 to be engaged with the spiral groove part X of sheath and holds a cable 3 and a drive source for rotating the resilient roller 11 to feed out the cable 3 wherein the cable 3 is fed out with tooth part meshing with the spiral groove part X.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable feeding device, and more particularly, it is used when laying a power cable having a corrugated sheath.

[0002]

2. Description of the Related Art When laying an electric power cable, as shown in FIG. 3, a feeding device 2 which is a combination of a pair of endless tracks is arranged near a place where a cable drum 1 is installed, and the cable 3 is operated by the feeding device 2. Cable drum 1
While pulling out from the cable 3, a connecting tool 4 such as a pooling eye is attached to the tip of the cable 3, and the wire rope 5 connected to the connecting tool 4 is wound up by a winch as shown by an arrow. It is designed to extend in the laying direction. In FIG. 3, reference numeral 6 is a guide roller that supports the cable 3.

Further, the feeding device 2 sets the amount of pulling out the cable 3 from the cable drum 1, and
It works to limit the amount of payout so that it will not be taken out more than necessary due to tension during installation. For this reason, the feeding device 2 is likely to be relatively large. For example, a device having a total length of 1.6 m and a weight of about 1500 KG is applied.

[0004]

However, as the demand for burying power cables underground has increased in recent years, the space available for cable laying has become more and more restricted due to the difficulty in acquiring land for the laying route. is there. In particular, for underground cables, the space available for laying work is often severely limited from the viewpoint of effective underground use. Furthermore, for underground cables,
In order to protect the cables during the burying period or during the laying work, many have a corrugated metal sheath and a vinyl sheath on the outside thereof.
Such a cable also has a drawback that the supportability of the pinched portion is impaired due to the unevenness of the surface.

The present invention has been made in view of the above circumstances, and aims to downsize the portion of the feeding device that tends to be large in size, and particularly to efficiently lay the power cable having a corrugated sheath. The purpose is.

[0006]

A device for feeding out a corrugated sheath of a cable when the cable is laid, the pair of elastic rollers having a toothed portion engaged with a spiral groove of the sheath to clamp the cable. And a drive source for feeding the cable by rotating the elastic roller.

[0007]

When the pair of elastic rollers are engaged with the spiral groove portion of the sheath, the elastic roller and the cable are
There is no slippage in the cable laying direction, and the rotation amount of the elastic roller by the drive source and the cable feeding amount accurately correspond. At the nipping point, the tooth profile of the elastic roller engages with the spiral groove, so that the force is prevented from being concentrated only on the convex portion of the sheath.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the cable feeding device according to the present invention will be described below with reference to FIGS.

The feeding device according to the present invention is also installed in the portion of the feeding device 2 illustrated in FIG. 3, but has the structure described below. 1 and 2, reference numeral 11 is an elastic roller, 12 is a drive source,
Reference numeral 13 is a rotational force transmission system, 14 is a support arm, 15 is a steadying roller, and X is a spiral groove.

The elastic rollers 11 are arranged in a pair so as to sandwich the spiral groove portion X provided in the sheath of the cable 3, and the toothed portion 11a for engaging with the spiral groove portion X is formed on the outer peripheral portion. The tooth profile 11a is formed of an elastic material such as rubber. Then, the tooth model 11a
Is set so that its contact portion matches the spiral direction of the spiral groove portion X.

The drive source 12 is an electric motor or the like having a speed reducer, and the rotational force transmission system 13 transmits the rotational force from the drive source 12 to the elastic roller 11 and adjusts the set rotational speed of the elastic roller 11. On the other hand, the one that suppresses the fluctuation of the rotation speed is applied.

The rotational force transmission system 13 includes a drive shaft 13a rotated by the drive source 12, a drive gear 13b connected to the drive shaft 13a, and a driven gear 13c meshing with the drive gear 13b. Two pinion gears 1 meshing with the drive gear 13b or the driven gear 13c
3d and the support arm 14 is
The drive gear 13b or the driven gear 13c is attached to the rotary shaft of the drive gear 13b or the driven gear 13c so as to be swingable and the rotation angle can be fixed. Further, the elastic roller 11 and the pinion gear 13d are integrally attached.

The steady rest roller 15 extends in the direction perpendicular to the direction in which the pair of elastic rollers 11 are clamped.
A pair of them are attached in a state in which the angle is changed by 90 degrees so that the cable 3 is sandwiched, and the lateral shake of the cable 3 is suppressed. Even in the steady rest roller 15, a toothed portion is provided in accordance with the spiral direction and the unevenness of the spiral groove portion X.

By changing the angle of the support arm 14, however, the pair of elastic rollers 11 are elastically brought into contact with and engaged with the spiral groove portion X to sandwich the cable 3 from the vertical direction in FIG. 1 and the pair of steady rests. The cable 3 is sandwiched by the use rollers 15, and the elastic roller 11 is rotated through the rotational force transmission system 13 by the operation of the drive source 12 to pull out the cable 3.

In this case, since the spiral groove portion X of the cable 3 and the toothed portion 11a of the elastic roller 11 are engaged with each other, the traveling speed of the cable 3 and the peripheral speed of the elastic roller 11 are different from each other. It always matches and does not slip in the cable laying direction. In addition, at the pinching portion of the cable 3, since the elastic roller 11 is formed of an elastic material and no slippage occurs due to the meshing between the toothed portion 11a and the spiral groove portion X, the spiral groove portion of the cable 3 is not formed. It is possible to avoid concentration of force only on the convex portion of X.

In one embodiment, one elastic roller is arranged in the longitudinal direction of the cable, but it may be plural.

[0017]

According to the cable feeding device of the present invention, the pair of elastic rollers that engage the spiral groove portion of the sheath with the toothed portion to hold the cable, and the drive for feeding the cable by rotating the elastic rollers. Since it is configured to include a source, the following effects are achieved. (1) Since the tooth profile of the elastic roller engages with the spiral groove, the cable does not slip in the cable laying direction, and the amount of rotation of the elastic roller by the drive source and the amount of cable extension accurately correspond. As a result, accurate cable laying work can be performed efficiently. (2) Since the cable is clamped in a state where the tooth profile of the elastic roller is engaged with the spiral groove, it is possible to prevent the clamping force from being concentrated on a part of the sheath and prevent damage to the cable. (3) Since the pinching portion of the cable is composed of the pair of elastic rollers, the size of the entire device can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a cable feeding device according to the present invention.

FIG. 2 is a partially omitted plan view showing an embodiment of a cable feeding device according to the present invention.

FIG. 3 is a front view showing a laying state of a power cable by a cable feeding device of a conventional example.

[Explanation of symbols]

1 ... Cable drum, 2 ... Feeding device, 3 ... Cable, 4 ... Connection tool, 5 ... Wire rope, 6 ... Guide roller, 11 ... Elastic roller, 11a ... Tooth profile,
12 ... Drive source, 13 ... Rotational force transmission system, 13a ... Drive shaft, 13b ... Drive gear, 13c ... Driven gear, 13
d: pinion gear, 14 ... support arm, 15 ... steady rest roller, X ... spiral groove.

Claims (1)

[Claims] 1. A device for feeding out a corrugated sheath of a cable while sandwiching the cable when the cable is laid, wherein a pair of elastic rollers engages a spiral groove portion of the sheath with a toothed portion to sandwich the cable, and the elastic roller. A cable feeding device, comprising: a drive source for feeding a cable by rotating a roller.