JPH0729752B2 - Rope traction machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope pulling machine for ropes and cables, and more particularly to a rope pulling machine for pulling ropes and cables in the work of laying or erection of various cables. .

[0002]

2. Description of the Related Art Laying and laying of various cables such as optical fiber cables are increasing due to the rapid progress of communication equipment and communication means. In such work, a tow rope or the like previously connected to one end of the cable is towed. Requires work,
To perform this work efficiently and mechanically, a towing machine is required.

That is, the cables are bundled with a cable tow rope which is preliminarily penetrated through the cable protection pipe between the two points A and B, and the cable tow rope is towed by the machine installed at any one of the points A and B. It is a machine device used in cable laying work for penetrating a cable and cable laying work for pulling a tow rope connected to one end of a cable laying steel rope.

The conventional towing machine is a mechanical device such as a hoisting winch capable of simply towing a rope, and it is large and requires a large installation area.
Since the pulling direction of the rope is fixed, the installation place is limited, for example, in cable laying work,
It had to be installed in the manhole with difficulty and could not be towed from the ground.

[0005]

As described above, the rope pulling machine in the conventional cable laying or erection work is a mechanical device that can be simply pulled, and a small and compact towing machine suitable for work is provided. Nothing is provided.

Therefore, the present invention provides a traction machine such as a rope, which is suitable for traction work in laying or erection of various cables and which is small in size and lightweight and has a high capability regardless of installation location and installation direction.

[0007]

A cord pulling machine according to the present invention is provided with a head case on a stand, and the head case is provided.
Has a hydraulic motor at one end and a substantially triangular chain at the other end.
The case and chain case cover are provided
Large roller shaft connected to the output shaft of the hydraulic motor
Provided inside the chain case and chain case cover,
Outside of large sprocket and chain cover on large roller shaft
Form an arcuate groove on the peripheral surface and stretch an elastic body in the groove
And a large roller, which extends diagonally below the large roller.
And two side-to-side discs with arcuate cross-sections are connected symmetrically.
Nail rollers that guide the tied rope and arc-shaped projections on the peripheral surface
Stretch the elastic body that comes out and make elastic contact with the large roller so that it can swing
And a small roller, and the large sprocket
Sprocket with gear ratio
Large roller, pinching roller and small roller are the same
Provide a configuration adapted to rotate at a peripheral speed.

[0008]

[0009]

[0010]

According to the present invention, when the load is increased by chucking the rope first with the sandwiching roller, the rope is further bitten and securely held, and the small roller that swingably contacts the large roller that produces the traction force is large. The traction force due to the rotation of the rollers is maintained at a high friction coefficient, and further, since each roller rotates at a constant speed, the rope is reliably pulled without being bent or coming off the rollers. A large-diameter portion such as a knot of a cord is clamped by the peripheral surface of the nipping rollers with a wide interval, and the small roller floats above the large roller to allow smooth passage.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a head case 2 is provided on an upper portion of a stand 1 that can be fixed to a truck bed or the like, a hydraulic motor 3 is provided at one end of the head case 2, and a substantially triangular chain case 4 is provided at the other end. And chain cover case 5
Are provided respectively. The output shaft 6 of the hydraulic motor 3 is shown in FIG.
As shown in FIG. 2, the large roller shaft 7 is connected near the top of the uppermost stage of the chain case 4, and the large roller 10 in which the large sprocket 8 and the elastic body such as the rubber band 9 are fitted to the large roller shaft 7 is attached. Axle.

Further, diagonally below the large sprocket 8, that is, near the lower apex of the chain case 4,
As shown in FIGS. 1 and 3, the first intermediate shaft 11 is provided,
The first small sprocket 12 and the sandwiching roller 13 are axially mounted on the first intermediate shaft 11. The nip roller 13 is
As shown in FIG. 5, since the tow rope bites into the groove and increases the friction coefficient by the wedge action, a groove width adjusting device in which two discs whose peripheral surfaces are arc-shaped are connected symmetrically to each other is provided. Have.

A second intermediate shaft 14 is provided on the side of the large sprocket 8, that is, in the vicinity of the apex of the lower stage of the chain case 4, and the second intermediate shaft 14 is provided with a second intermediate shaft 14 as shown in FIG. 2 Small sprockets 15 and small roller shaft 1
The third small sprocket 17 for rotating 6 is fixed.
In addition, the swing arm 19 is attached to the bush 18 of the second intermediate shaft 14.
Then, the swing arm cover 20 is supported, and the swing roller 19 supports the small roller shaft 16.

The small roller shaft 16 has a small roller 22 fitted with an elastic body such as a rubber roller 21 for increasing the coefficient of friction and protecting the rope at one end, and the small roller 22 at the other end.
The free gears 23 that rotate and overrun are fixed to each other, and the roller chain 24 is stretched over the third small sprocket 17 and the free gear 23.

Further, a chain tensioning device 25 is provided on the chain case 4, a sprocket of the chain tensioning device 25 and a first small sprocket 12 provided on the first intermediate shaft 11,
The outside of one side of the roller chain 26 stretched on the second small sprocket 15 provided on the second intermediate shaft 14 is brought into pressure contact with the large sprocket 8 provided on the large roller shaft 7 to rotate the large sprocket 8 counterclockwise. In contrast, the first small sprocket 1
2 and the second small sprocket 15 are rotated clockwise. It should be noted that each sprocket has the same number of teeth as the peripheral speed of each roller.

As shown in FIGS. 1 to 3, the chain cover 5 is provided with a tow rope entrainment preventive 27 for the large roller 10 and the swing arm 19 is provided with a handle 29 so that the chain case 4 is not shown. The rubber ring 30 hung on the rubber bolt is extended and hung on the handle 29 to press the small roller 22 against the large roller 10.

The operation of the above embodiment will be described. A rope 31 such as a tow rope from an optimum position by a pulley (not shown) or the like.
Is adjusted so that it does not touch the bottom of the groove, the lower part of the nip roller 13 is half-circled from above, the handle 29 is pulled, and the small roller 22 is moved close to and pressed between the upper part of the large roller 10 and the small roller 22. Then, the control valve (not shown) is operated to drive the hydraulic motor 3, the large roller shaft 7 connected to the output shaft 6 thereof is rotated, and the nip roller 13 and the small roller 22 are connected to the large roller 10 by the large sprocket 8. The rope 31 is rotated and pulled at the same peripheral speed, and the pulled rope 31 is wound around a storage basket or the like on the floor where the stand 1 is fixed in a coil shape and converged.

Therefore, the rope 31 is first chucked by the nipping roller 13 and further gripped when the load increases, and is securely held, and the small roller 22 elastically contacting the large roller 10 for providing the traction force rotates the large roller 10. The traction force of the roller is maintained at a high coefficient of friction, and each roller 10,
By rotating the members 13 and 22 at a constant speed, the cord 31 is reliably pulled without being bent or disengaged. Further, a large-diameter portion such as a knot of the rope 31 passes through a wide interval between the sandwiching rollers 13, and the small roller 22 swings smoothly due to the swinging of the swinging arm 19 and the overrun operation of the free gear 23. It can be towed efficiently by passing it through. Further, the pulling direction of the cord 31 can be guided from any direction by using a separate pulley or the like not shown.

Since the rollers 10, 13, 22 are compactly positioned on the substantially triangular chain case 4 and the chain cover 5 supported by the stand 1, the configuration is simple and the installation and transportation are easy. And
For example, it can be used as it is installed on a truck bed.

[0020]

According to the present invention described above, a sandwiching roller which increases the friction coefficient by the wedge action to guide the rope to the large roller and the small roller, and the elastic body increases the friction coefficient and the rope. Since each roller of the large roller and the small roller designed to protect the strip is rotated at the same peripheral speed to strengthen the traction force and each roller is arranged in a compact manner, it is small and lightweight and can be installed anywhere. It is possible to carry out cable laying or erection work without being lowered to a manhole or the like while being installed on a truck bed or the like.

Further , the peripheral surfaces of the large roller and the small roller are
The ropes are made sure by the cross-sectional shapes that complement each other
Can be clamped and guides the rope to the large roller
It has a pinch roller, and this pinch roller is
Is a structure in which two discs with an arcuate cross section are connected in a symmetrical manner.
As a result, the cord can cut into the groove,
Increase the traction force while increasing the rope diameter
Even if you can guide smoothly. Further, by using a pulley or the like, it is possible to easily pull the rope from any direction, and there is no problem even if the pulling direction of the rope is fixed in one direction. The towed line is naturally coiled into a storage basket or the like on the floor where the line puller is installed. Due to the configuration of each roller, the rope can be reliably pulled without slipping or bending.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an enlarged front view of a main part of FIG.

FIG. 4 is a vertical sectional side view of a main part of FIG.

5 is a cross-sectional view taken along the line AA of FIG.

6 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 ... Stand 2 ... Head case 3 ... Hydraulic motor 4 ... Chain case 5 ... Chain case cover 6 ... Output shaft 7 ... Large roller shaft 8 ... Large sprocket 9 ... Rubber band 10 ... Large roller 11 ... First intermediate shaft 12 ... No. 1 small sprocket 13 ... nip roller 14 ... 2nd intermediate shaft 15 ... 2nd small sprocket 16 ... small roller shaft 17 ... 3rd small sprocket 18 ... bush 19 ... rocking arm 20 ... rocking arm cover 21 ... rubber roller 22 ... Small roller 23 ... Free gear 24 ... Roller chain 26 ... Roller chain 27 ... Tow rope entanglement prevention device 29 ... Handle 30 ... Rubber ring 31 ... Rope

Claims (1)

[Claims] 1. A head case is provided on a stand, a hydraulic motor is provided at one end of the head case, and a substantially triangular chain case and a chain case cover are provided at the other end, and the head case is connected to an output shaft of the hydraulic motor. Then, the large roller shaft is provided in the chain case and the chain case cover, and an arcuate groove is formed on the peripheral surface of the large roller shaft outside the large sprocket and the chain cover, and an elastic body is formed in the groove.
A large roller that is stretched is attached to the shaft, and two discs having arcuate cross-sections are paired left and right diagonally below and on the side of the large roller .
On the nip roller and the peripheral surface that guide the ropes connected in a nominal shape
Elastic body that protrudes in an arc shape can be stretched to swing on a large roller
Provided elastically Sessu that small roller and respectively, and were the large sprocket to the large roller interlocked with chain through the sprocket to have a gear ratio, the nip rollers and small rollers to rotate at the same circumference speed A rope pulling machine characterized by that.