JPH0353562Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a pulling eye used when pulling a plurality of cables together into a conduit or the like.

(Prior Art) A pooling eye generally has a structure as shown in FIG.

Reference numeral 1 denotes a disk-shaped cable fixing fitting, and a plurality of cables 10 (for example, three cables) are fixed to the fixing fitting 1 at once. Cable fixing bracket 1
To fix multiple cables 10 all at once, strip off the end of the cable 10 to expose the conductor 11, and insert a screw groove 1 in the head of the exposed conductor 11.
2 is engraved, the compression sleeve 13 is compressed and connected, a protective tape 24 is wrapped around it, the thread groove 12 of the compression sleeve 13 is inserted into the through hole of the cable fixing fitting 1, and the nut 14 is screwed into the thread groove 12. Do it by doing this. Reference numeral 2 denotes a cylindrical protective tube that covers the cable fixing fitting 1 and also covers the outer periphery of the ends of the plurality of cables 10, and is fixed to the cable fixing fitting 1 with screws 15. 3 is cable fixing fitting 1 and protection tube 2
It is a tension fitting that pulls the cable fixing fitting 1.
7 screwed together.

The pooling eye with the above configuration is generally used when pulling multiple cables into a conduit, but the
It is also used when inspecting pipelines as shown in the figure.
When inspecting pipes, use a certain length (about 5 to 6 m)
Pulling eyes are placed at both ends of the multiple cable 18.
AB is attached, wires 19 and 20 are connected to both pooling eyes AB, and one wire 19 is pulled, while back tension is applied to the other wire 20 to draw the pooling eye AB into the conduit. If an abnormality is found in the pipe line during this inspection, it is necessary to pull back the pooling eye AB, and if there is a step 21 in the pipe line when pulling it back, the pooling eye A will get caught on the step 21 in the pipe line. There is a problem that the pooling eye AB cannot be pulled back. As a result of investigating the cause of this, we found that
As shown in the figure, there is a gap 22 between the protective tube 2 of the pooling eye and the plurality of cables 10, and it was found that this is because the stepped portion 21 of the conduit gets caught in the gap 22. . Such a problem also occurs when an abnormality occurs during the work of pulling a plurality of cables into a conduit and the cables are pulled back.

(Structure of the invention) The invention was made to solve the above problems, and its structure consists of a cable fixing fitting that fixes multiple cables at once, and a cable fixing fitting that covers the fixing fitting and connects the plural cables together. In a pulling eye consisting of a protective tube that covers the outer periphery of the cable terminal and a tensioning fitting that pulls the fixing fitting and the protective tube, the terminal of the protecting tube has a base fixed to the protecting tube and a distal end curved in an arcuate shape. The present invention is characterized in that a gap closing plate formed to enter the gap between the cables is provided to close the gap between the protective tube and the plurality of cables.

(Example) An example of the present invention will be described in detail with reference to FIGS. 1 and 2.

The pooling eye according to the present invention is provided at the terminal part of the protection tube 2 to provide a connection between the protection tube 2 and the plurality of cables 10.
Closing the gap = The feature is that a gap closing plate 25 is provided. In the embodiment, three cables are shown, and three gap closing plates 25 are provided at the end of the protective tube 2 to close the gaps between the protective tube and the three cables. The gap closing plate 25 is formed so that its base has an arc that matches the arc of the inner periphery of the protection tube 2, and its distal end is curved in an arched shape to enter the gap between the cables. This closing plate 25 is
It is fixed to the end of the protection tube with screws using the screw attachment hole 26 provided in the base.

By closing the gap between the protection tube and the plurality of cables with the gap closing plate in this way, even if the pulling eye is pulled back in the opposite direction, it will not get caught on the stepped portion of the conduit.

In the above embodiment, the gap closing plate is separate from the protection tube, but the gap closing plate may be formed integrally with the protection tube. Further, the number of baffle plates is appropriately selected depending on the number of cables.

(Effects of the invention) As described above, the pooling eye according to the invention has
A gap closing plate is provided at the end of the protection tube, the base of which is fixed to the protection tube, and the distal end curved in an arched shape to enter between the cables. Since the gap between the pipes is closed, the pooling eye will not get caught on the stepped portion of the conduit when it is pulled back.
In particular, in this invention, the distal end of the gap closing plate is curved in an arched shape and is formed to enter the gap between the cables, so that when the pulling eye is pulled back, the pulling eye does not touch the stepped part of the conduit. You can definitely prevent it from getting caught. Therefore, pipe inspection work and cable pulling work can be carried out quickly.

[Brief explanation of the drawing]

Figures 1A and 1B show the closing plate used in the present invention; A is a front view;
FIG. 3 is an explanatory diagram of a pipe line inspection state, and FIG. 4 is a sectional view of the end of a protective tube of a conventional pulling eye. 1 is a cable fixing fitting, 2 is a protection tube, 3 is a tension fitting, and 25 is a closing plate.

Claims (1)

[Scope of utility model registration request] A pulling eye comprising a cable fixing fitting for fixing a plurality of cables at once, a protective tube that covers the fixing fitting and also covers the outer periphery of the terminals of the plurality of cables, and a tension fitting for pulling the fixing fitting and the protection tube. , a gap closing plate is provided at the end of the protection tube, the base of which is fixed to the protection tube, and the distal end of which is curved in an arch shape so as to enter the gap between the cables; A pooling eye characterized by closing the gap between cables.