JPH0715818A - Traction device - Google Patents

Abstract

(57) [Summary] [Purpose] The cable can be laid in a narrow space such as a handhole with a simple operation from the ground, ensuring work safety and improving work efficiency. [Structure] A fulcrum support member 5 having a fulcrum fulcrum member 3 at its tip is vertically movably attached to a fixed base 6, and a gripping member for grabbing a towed object at the tip of a lever lever 4 which is detachable from the lever fulcrum member 3 I attached 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for pulling a cable or the like in a narrow space such as a handhole.

[0002]

2. Description of the Related Art For example, as an example of a device for pulling and laying cables, there is a cable attachment robot device disclosed in Japanese Patent Laid-Open No. 1-268415, which has an anchor bolt driving machine and a cable drum. A cable-equipped robot consisting of a four-wheeled trolley equipped with a condition monitoring camera, which is placed in the sewer pipe and is advanced while fixing the cable to the ceiling of the sewer pipe while confirming with the camera. Then, fix the cable to the wall of the sewer without manual intervention.

In such a place where the work place is relatively large,
Although an attachment device such as a robot can be placed, for example, when laying cables in a narrow handhole, there is no space to place a large-scale device, so conventionally, it is done by manually entering the inside or from outside the handhole. I put my hands in, and there was nothing established as a laying device.

[0004]

When laying cables and the like in a narrow space such as a handhole, it is necessary to rely on human hands as described above, so that the work is performed in an unstable and impossible posture. The safety was insufficient and work efficiency was not good.

The object of the present invention is to eliminate the disadvantages of the prior art, and to lay and tow cables in a narrow space such as a handhole from the outside without the need for a person to enter the laying site. It is to provide a towing device capable of improving safety and working efficiency.

[0006]

In order to achieve the above object, the present invention attaches a fulcrum support member having a lever fulcrum member at its tip to a fixed base so that the fulcrum support member can move up and down, and the lever bar is detachable from the lever fulcrum member. The gist is that a gripping member for gripping a towed object is attached to the tip of the.

[0007]

According to the present invention, for laying a cable in a handhole, for example, a fulcrum support member is inserted into the handhole from a fixed base fixed to the upper surface of the handhole,
The lever lever member at the tip abuts the inner wall of the handhole.
Then, the lever is attached to the lever fulcrum member, the gripping member at the tip holds the cable, and in this state, a reaction force is applied to the inner wall of the handhole to set the other end of the lever as the fulcrum. If it is pulled, the gripping member moves in the direction opposite to the pulling direction, and the cable held there is pulled.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a partially cutaway perspective view showing a first embodiment of a towing device of the present invention, and a case where a cable 2 is towed and laid in a handhole 1 as a narrow place will be described as an example.

Reference numeral 3 in the figure denotes a lever supporting member which supports a lever 4 which will be described later. The lever supporting member 3 is a plate-shaped contact plate 3a which contacts the inner wall of the handhole 1 and the contact plate 3.
Tubular fulcrum member 3 horizontally protruding from a for adjustable length
and b.

The lever fulcrum member 3 is attached to the lower end of a rectangular frame-shaped fulcrum support member 5 whose length is adjustable in the vertical direction, and the fulcrum support member 5 is fixed to a girder-shaped fixing base 6.

The lever bar 4 is combined with the lever fulcrum member 3, and the vicinity of the lower end thereof is slightly bent, and a protrusion 4a for fitting into the lever fulcrum member 3 is provided here, and cables such as cables to be pulled are provided at the lower end. A gripping member 7 for gripping is formed so that the length can be adjusted.

As an example, as shown in FIG. 3, the gripping member 7 has an expanding / contracting member 12 which expands / contracts due to the pressure of the gas filled inside the opposite side wall of an outer shell 7a having a U-shaped cross section and having a lower surface formed into an opening. The expansion / contraction member 12 is formed of an elastic body such as rubber so that the contact portion 12a in contact with the cable 2 in the expanded state has a smaller degree of expansion than the other portions. Therefore, the wall pressure of this portion is made thicker than that of the other portion, or a rubber tape or the like is attached to make the thickness thicker to make it difficult to expand.

Further, a cushioning material 13 for preventing damage to the cable 2 is provided inside the upper portion of the outer shell 7a, and a protective sheet is further provided.
14 integrally covers the inside of the elastic member 12 and the outside of the opposing side wall of the outer shell 7a. The protective sheet 14 protects the expansion / contraction member 12 from the tension of the pulling force and also copes with sliding friction, and has a large number of protrusions such as a wavy shape, a suction cup shape, a wart shape, a lattice shape, and a rectangular protrusion shape. The portion 14a is formed. 15 in the figure
Is a metal fitting for fixing the protective sheet 14 to the outer shell 7a.

Then, the gas pipe 8 is connected to the elastic member 12,
An opening / closing valve is provided in the gas pipe 8, a switch 9 for opening and closing the opening / closing valve is provided on the upper portion of the lever 4, and a lever 9a for turning on / off the switch 9 is attached to the lever 4. In the figure
Reference numeral 10 indicates a cable pipe attached to the handhole 1.

Next, the operation of pulling the cable 2 in the handhole 1 will be described. First, on the ground, the fulcrum support member 5 and the lever fulcrum member 3 are incorporated into the fixed base 6, the fixed base 6 is placed on the upper part of the handhole 1, and the lever fulcrum member 3 is handholeed via the fulcrum support member 5. Insert in 1.

Adjust the length of the fixing base 6 to adjust the handhole 1
Cable that is connected to the handhole 1 by adjusting the length of the fulcrum support member 5 to suit the size of the opening of the
Position the lever fulcrum member 3 above the position 10 and contact plate 3
The a is brought into contact with the inner wall of the handhole 1, and the fulcrum member 3b is projected inward.

Next, the lever 4 is inserted into the handhole 1 from the gripping member 7 at the tip, and the projection 4a protruding from the lever 4 is inserted into the tip of the fulcrum member 3b of the lever fulcrum member 3 with one touch from the ground. To wear. In this way, with the lever 4 attached to the lever fulcrum member 3, the length of the fulcrum support member 5 is finely adjusted again to match the height position of the gripping member 7 with the position of the cable 2 to be laid. The cable 2 is inserted between the outer shells 7 a of the cable 7 along the length direction.

A gas supply device such as a gas cylinder or a compressor is connected to the gas pipe 8, and a gas such as air or nitrogen is pressure-fed to the gas pipe 8 from here. Then, when the lever 9a at the upper end of the lever 4 is grasped by hand, the switch 9 is turned on, gas is pressed into the elastic member 12 in the grasping member 7, and this is expanded, and the cable 2 inserted between them is inserted from both sides. Hold it so that it is sandwiched.

Next, when the upper portion of the lever 4 is pulled to the left in the figure, the lever 4 applies a reaction force to the inner wall of the handhole 1 via the lever fulcrum member 3 with the point of the protrusion 4a as the fulcrum.
The grip member 7 at the lower end moves in the right arrow direction, and as a result, the cable 2 held by the grip member 7 is pulled to the right.

When the cable 2 is pulled by pulling the upper portion of the lever 4 by a strokeable amount, the lever 9a is returned to the original state, the switch 9 is turned off, and the gas to the expansion / contraction member 12 in the holding member 7 is returned. Stop press-fitting. As a result, the elastic member 12 contracts and the cable 2 sandwiched therebetween is released from the gripping member 7.

Therefore, this time, the upper part of the lever 4 is pulled to the right and only the gripping member 7 is moved to the left. In this state, the switch 9 is turned on in the same manner as described above to press the gas into the telescopic member 12. Then, the cable 2 is again pinched by the gripping member 7, the lever 4 is pulled to the left, and the cable 2 is pulled to the right. By repeating this, the cable 2 is pulled rightward and laid.

As described above, the cable 2 can be towed and laid in the handhole 1 simply by opening and closing the lever 9a while pulling the upper part of the lever 4 on the ground outside the handhole 1 to the left and right.

FIG. 2 shows a second embodiment of the present invention.
Even when the opening is narrowed in the handhole 1 or the like, unlike the case of the first embodiment, the fulcrum support member 5 and the fulcrum member 3b integrated with the fulcrum support member 5 are oriented in the opposite directions in the drawing, and the contact plate 3a. By replacing the protrusion 4a with the fulcrum support member 5 and the fulcrum member 3b, the cable 2 can be pulled by the operation at the narrowed opening.

[0024]

As described above, the traction device of the present invention is
Laying cables in narrow places such as hand holes,
The operation can be reliably performed with a simple operation from the ground, work safety can be ensured, and work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of a traction device of the present invention.

FIG. 2 is a perspective view showing a second embodiment of the traction device of the present invention.

FIG. 3 is a front view showing an example of a holding member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hand hole 2 ... Cable 3 ... Lever fulcrum member 3a ... Abutment plate 3b ... fulcrum member 4 ... Lever rod 4a ... Protrusion 5 ... fulcrum support member 6 ... Fixing base 7 ... Gripping member 7a ... Outer shell 8 ... Gas pipe 9 ... Switch 9a ... Lever 10 ... Cable tube 11 ... Pin 12 ... Expanding member 12a ... Contact part 13 ... Cushioning material 14 ... Protective sheet 15 ... Pressing metal

Claims (1)

[Claims] 1. A fulcrum support member having a lever support member at its tip is attached to a fixed base so as to be vertically movable, and a gripping member for holding a towed object is attached to the tip of a detachable lever bar on the lever support member. Traction device characterized in that.