JPH0445392Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to a pulling eye used for laying an armored cable or a cable having a wire shield structure.

(Technical background of the invention and its problems) Since large tension is applied to cables installed in shafts, etc., armored cables with aluminum wire or the like as armored wires are used. Furthermore, for CV cables of 66 kV class or higher, cables with a wire shield structure in which a shield layer is formed of copper wire or the like are used.

By the way, FIG. 2 shows a conventional pulling eye used for laying armored cables. That is, the armored cable has a cable core 1, an aluminum armor wire 2 provided thereon, and a sheath layer 3, and the pulling eye main body 5 of the pulling eye 4 has a conductor exposed at the terminal of the cable core 1. It is compressed and fixed on 1a. The small diameter threaded portion 5a of this pulling eye main body 5 is screwed into a cap 7 having an eye nut 6.

When installing an armored cable having such a configuration, the armored cable is pulled through the pulling eye 4 by a pulling wire (not shown) connected to the eye nut 6. However, in an armored cable, the cable core 1 and the sheath layer 3 are not in close contact because the aluminum armor wire 2 exists between them, and therefore the binding force between the cable core 1 and the sheath layer 3 is It's getting weaker. Therefore, as described above, when pulling the armored cable by simply compressing and fixing the pulling eye body 5 on the conductor 1a, frictional force is applied to the sheath layer 3 by the ground, pipe wall surface, etc. There was a risk that the core 1 would become misaligned with the sheath layer 3.

Therefore, conventionally, as shown in FIG. 2, the end of the aluminum sheathed wire 2 was fitted with a lead wire 8 on the flat surface of the pulling eye body 5, thereby preventing the cable core 1 from shifting. However, when performing lead work in this manner, the insulating layer of the cable core 1 deteriorates due to the heat generated during the work.

Additionally, the end of the aluminum sheathed wire 2 is fixed around the circumferential surface of the pulling eye body 5 by wrapping a bind wire around it. There is a risk that it will happen.

Furthermore, the pulling eye body 5 is connected to the aluminum exterior wire 2.
It is also conceivable to compress and fix it onto the conductor 1a while it is inserted. However, in this case, the insertion diameter of the pulling eye body 5 must be increased, making it difficult to firmly compress and fix the pulling eye body 5. Therefore, the length dimension of the pulling eye body 5 must be increased. It becomes necessary to increase the size and secure the compressive fixing force.

The above drawbacks also occur in cables with a wire shield structure.

(Purpose of the invention) The purpose of the invention is to create a pooling system that allows armored cables and wire-shielded cables to be laid without degrading the insulation layer or increasing the length while preventing cable core misalignment. Our goal is to provide you with an eye.

(Summary of the invention) The present invention provides a pooling eye that is attached to the terminal of a cable in which an armored wire or a shield wire is provided on the cable core, and a sheath layer is further provided thereon. a pulling eye body, a sleeve for fixing the sheathing wire or shield wire to the cable core, and a sheath slippage prevention member having one end fixed to the sleeve and the other end fixed to the sheath layer. It is characterized by having the following.

(Embodiments of the invention) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example in which a pulling eye 10 according to the present invention is attached to an armored cable. That is, this armored cable consists of a cable core 1, an aluminum armored wire 2 and a sheath layer 3 provided thereon, and a conductor 1 at the terminal of the cable core 1.
a is exposed.

On the other hand, the pulling eye 10 of the present invention has a conductor 1a.
Pulling eye body 1 compressed and fixed on top
1, and a small-diameter threaded portion 11a coaxially provided on this pulling eye body 11 is screwed into a screw hole 12a provided in the outer wall of the cylindrical cap 12, and the eye nut 1 is fixed to this outer wall.
It is inserted into the base of 3. A copper sleeve 14 having a small length is located near the pulling eye body 11. This sleeve 14 is compressed and fixed onto the conductor 1a with the end of the aluminum sheathed wire 2 inserted therein. The inserted end of the aluminum sheathed wire 2 is bent onto the sleeve 14. One ends of a plurality of anti-slip members 15 are fixed in advance to the circumferential surface of the sleeve 14 by soldering or riveting. The other ends of these anti-slip members 15 extend to the end of the sheath layer 3, and are fixed to the peripheral surface of the end of the sheath layer 3 by winding a bind wire 16. A waterproof tape 17 is wound between the pulling eye main body 11 and the sheath layer 3 so as to straddle them.

In this way, when the aluminum sheathed wire 2 is passed through the sleeve 14 and the sleeve 14 is compressed and fixed onto the conductor 1a, when a traction force is applied to the pulling eye body 11 with the traction wire (not shown) connected to the eye nut 13, the conductor 1a Not only is tension applied to the cable core 1 through the conductor 1a and the sleeve 14, but tension is similarly applied to the aluminum sheathed wire 2 through the conductor 1a and the sleeve 14. Furthermore, as described above, when the aluminum sheathed wire 2 is bent, it is possible to prevent the aluminum sheathed wire 2 from slipping out from the sleeve 14.
Therefore, cable core 1 can be installed without performing lead work.
The armored cable can be laid while reliably preventing displacement of the cable, and since there is no need to increase the length of the pulling eye main body 11, the pulling eye does not become large.

In the above embodiment, a plurality of anti-slip members 1
5 is fixed to the sheath layer 3 via the binding wire 16, these slip prevention members 15 and the sleeve 1
4, tension can also be applied to the sheath layer 3 itself. Therefore, displacement of the cable core 1 of the armored cable can be more reliably prevented.

Note that the present invention can also be applied to cables with a wire shield structure. That is, in the pooling eye 10 of the present invention, by compressing and fixing the sleeve 14 to the cable conductor with the shield wire passed through, a cable having a wire shield structure can be laid while preventing the cable core from shifting. .

(Effects of the invention) As explained above, according to the invention, since the armor wire or shield wire is fixed to the cable core with a sleeve, the shift of the armor wire or shield wire during cable installation can be avoided without performing lead work. Furthermore, since the end of the sheath layer is fixed to the sleeve via the sheath displacement prevention member, displacement of the sheath during cable installation can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a state in which a pulling eye according to the present invention is attached to an armored cable, and FIG. 2 is a sectional view showing a state in which a conventional pulling eye is attached to an armored cable. DESCRIPTION OF SYMBOLS 1...Cable core, 1a...Conductor, 2...Aluminum exterior wire, 3...Sheath layer, 11...Pulling eye body, 14...Sleeve, 15...Slip prevention member, 16...Binding wire.

Claims (1)

[Claims for Utility Model Registration] In a pooling eye that is attached to the terminal of a cable in which an armored wire or shield wire is provided on the cable core, and a sheath layer is further provided on top of the armored wire or shield wire, the pulling eye is attached to the cable core. a pulling eye main body; a sleeve for fixing the sheathing wire or shield wire to the cable core;
A pulling eye comprising: a sheath displacement prevention member having one end fixed to the sleeve and the other end fixed to the sheath layer.