JPH0785366B2 - SZ twisted wire shield device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to a high voltage cable manufacturing apparatus, and more particularly to an SZ twisted wire shield apparatus for SZ twisting a shield wire on a high voltage cable.

Conventional technology and problems Conventionally, for example, a high voltage cable of 154 KV is wrapped with a shielded wire such as a copper tape or a copper wire in order to improve the electric characteristics of the cable. A phenomenon in which the shielded wire buckles when a bending action is applied to the wire is found, and in recent years a shielded wire is provided by SZ twisting in order to prevent such a buckling phenomenon of the shielded wire, a so-called "SZ twisted wire shield method". Was developed.

A conventional SZ twisted wire shield device 1 is illustrated in FIG. 4, in which the cable C penetrates through the central portion and a guide hole for guiding a plurality of shield wires S in an annular shape is provided on the outer peripheral portion. Like the fixed eye plate 2, the fixed eye plate 2 has a cable C that penetrates through the central portion thereof, and has a guide hole for guiding a plurality of shielded wires S in an annular shape in the outer peripheral portion, and reciprocates. And a reversing eye plate 4 supported so as to be able to rotate. Cable C that is fed through the fixed eye plate 2 and the reversal eye plate 4
A plurality of shielded wires S are wound in SZ twist around the outer circumference of the inversion plate 4 by reversing movement at a predetermined cycle.
The SZ twisted shield wire is a taping head (not shown)
It is fixed to the outer circumference of the cable by the holding tape T supplied from

Further, the SZ twisted wire shield device having such a structure has a structure in which the shield wire S supplied from the taping head contacts the cable C and fixes the shield wire S to the cable C, and the reversing eye plate 4. The distances between them cannot be close to each other, and it is necessary to separate them by a predetermined distance l. For this reason, the fixing of the shield wire S by the pressing tape T was insufficient, and the shield wire floated and twisting disorder of the shield wire S occurred.

Even if the reversing eye plate 4 is reversed by a predetermined angle, the reversing eye plate 4
Since the distance l from the shield wire winding position P to the shield wire S is long, the reversing eye plate 4 is reversed before the shield wire S is wound up to the predetermined reversal angle, and as a result, the reversal angle of the shield wire S decreases. There was a problem. When the reversing eye plate 4 is rotated by 180 degrees or more in order to compensate for such a decrease in the reversing angle, the shield line S causes the cable C on the rear side of the reversing eye plate 4, that is, on the side opposite to the side where the pressing tape T is arranged. If the wound shield wire S is disconnected, there is a bad effect, and there is a restriction on increasing the reversal angle of the rotary eye plate 4.

OBJECT OF THE INVENTION An object of the present invention is to provide an SZ twisted wire shield device capable of securely fixing a shielded wire with a holding tape and eliminating floating or twist disturbance of the shielded wire.

Another object of the present invention is to provide an SZ twisted wire shield device capable of increasing the reversal angle of the reversal plate without breaking the shield wire.

Means for Solving Problems The above objects are achieved by the SZ twisted wire shield device according to the present invention. In summary, the present invention is an SZ wire wire shield apparatus having a fixed eye plate for guiding a shield wire and an inversion eye plate that gives an inversion movement to the shield wire from the fixed eye plate, A guide means is integrally provided on the reversing eye plate to guide the shield wire to the vicinity of the holding tape, and further, the shield wire is wound around the cable on the opposite side of the reversing eye plate from the guide means. SZ characterized by having a cylindrical part to prevent it
It is a twisted wire shield device.

Next, the SZ twisted wire shield device according to the present invention will be described in more detail with reference to the drawings.

Referring to FIGS. 1 and 2, the SZ twisted wire shield device 10 according to the present invention has the same overall structure as the SZ twisted wire shield device 1 described with reference to FIG. There is a large difference in the structure related to. That is, in this embodiment, the SZ twisted wire shield device 10
In the same manner as in the conventional device 1, the cable C penetrates through the central portion, and the fixed eye plate 12 having a guide hole for guiding the plurality of shield wires S in an annular shape on the outer peripheral portion, and the fixed eye plate. Reversing eye plate 14 for imparting reversing motion to each shield wire S guided by 12
And the eye plates 12 and 14 are attached to the base 11.

In accordance with the present invention, as best illustrated in FIG.
Similar to the fixed eye plate 12, the reverse eye plate 14 has a central hole portion 14a through which the cable C penetrates, and a plurality of shield wire guide holes 14b arranged in an annular shape on the outer peripheral portion, and has a reciprocating rotary motion. Although it is supported so as to be movable, it further has a guide means 16 for guiding the shield wire S fed from the reversing eye plate 14 to the cable C to the immediate vicinity of the holding tape T. According to the present embodiment, the guide means comprises an annular guide ring 18 which is spaced from the reversing plate 14 by a predetermined distance and which is arranged parallel to the reversing plate 14. The guide ring 18 has a center hole 18a through which the cable C penetrates, and a plurality of shield wire guide holes 18b formed on the outer circumference at the same circumference at predetermined intervals. Further, the guide ring 18 has a shield wire guide hole whose radial position is smaller than that of the reversing eye plate 14, so that each shield wire S sent from the guide ring 18 is converged to a position near the pressing tape T. It will be guided in the form of.

Although the guide ring 18 can be fixed to the reversing eye plate 14 by any method, according to the present embodiment, the reversing eye plate 14 is provided by a plurality of connecting rods 20 extending from the reversing eye plate 14 to the guide ring 18.
Mounted on. Further, in this embodiment, the connecting rod 20 is reinforced by a reinforcing ring 22 provided between the reversing eye plate 14 and the guide ring 18.

Another embodiment of the guide means 16 is illustrated in FIG. According to the present embodiment, the guide means 16 is a frustoconical integrally-formed component 24 which converges from the reversing eye plate 14 into a tapered shape. Of course, the guide part 24 also has a cable through hole 24a at the center thereof and a shield wire guide hole 24b at the outer peripheral portion.

According to the present invention, the reversing eye plate 14 is further provided with the guide means.
Even if the reversing angle of the reversing eye plate 14 is set to 180 degrees or more on the side opposite to 16, the shield wire S is wound around the cable C to prevent problems such as disconnection. A shield wire winding prevention means 26 is provided. In the embodiment shown in FIGS. 1 to 3, the preventing means 26 is a cylindrical pipe part having a through hole 26a for the cable C, and the reversing plate 1
It is fixed integrally to 4. It is not essential that the prevention means 26 move in reverse with the reversing plate 14.

With the above structure, the plurality of shielded wires S are SZ twisted by the inversion movement of the inversion eye plate 14 at a predetermined cycle on the outer circumference of the cable C which is fed through the fixed eye plate 12 and the inversion eye plate 14. Wrapped around. At this time, according to the present invention, the shield wire S is supplied to the immediate vicinity of the holding tape T supplied from the taping head (not shown) by the guide means 16. Further, even if the reversing angle of the reversing eye plate 14 exceeds, for example, 180 degrees, the shield wire S is not directly wound around the cable C by the shield wire wrapping prevention means 26, and the shield wire S
Is prevented.

As described above, the SZ twisted wire shield device according to the present invention is provided with guide means integrally with the reversing eye plate to guide the shield wire from the reversing eye plate to the vicinity of the holding tape, and further, Since a cylindrical part for preventing the shielded wire from wrapping around the cable is provided on the side opposite to the guide means of the reversing eye plate, the shielded wire should be fixed to the cable with a holding tape. There is an effect that it is possible to reliably carry out the floating of the shielded wire or to prevent twisting disorder, and it is possible to increase the reversal angle of the reversing eye plate without breaking the shielded wire.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an embodiment of an eye plate portion of an SZ twisted wire shield device according to the present invention. FIG. 2 is a perspective view of the reversing plate portion of FIG. FIG. 3 is a front view of another embodiment of the eye plate portion of the SZ twisted wire shield device according to the present invention. FIG. 4 is a front view of an eye plate portion of a conventional SZ twisted wire shield device. 12: Fixed eye plate 14: Reverse eye plate 16: Guide means 18: Guide ring 24: Conical guide 26: Cylindrical part

Claims (1)

[Claims] 1. An SZ twisted wire shield apparatus having a fixed eye plate for guiding a shield wire and an inversion eye plate for giving an inversion movement to the shield wire from the fixed eye plate, wherein the shield wire from the inversion eye plate is provided. Guide means is integrally provided on the reversing eye plate to guide the pressing tape to the vicinity of the pressing tape, and
An SZ twisted wire shield device, characterized in that a cylindrical part for preventing the shield wire from being wound around the cable is provided on the side of the reversing plate opposite to the guide means.