JPS6250804B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical cable installation device that installs an optical cable while pushing it into a vacant cable insertion space of a hanging wire having a cable insertion space.

The present applicant proposed a suspension cable having multiple cable insertion spaces so that, as the number of subscribers increases, other communication cables can be added to the existing communication cables. (See No. 113945). In addition, in order to install a new cable by pushing it into this suspension wire, we proposed a method for laying the cable by suspending it from the suspension wire so that it can run freely, and guiding the new cable into the cable insertion space while pushing out the entrance of the cable insertion space ( (See Japanese Patent Application No. 152065/1983). However, if the cable insertion space of the suspension wire is straight, the cable can be laid without any problem using the above-mentioned installation method, but if this cable insertion space extends spirally around the axis of the suspension wire ( If the cable is twisted two or three times in one span when installing the cable, it is possible to prevent the cable from coming out of the cable insertion space.) It is necessary to rotate the installation means around the axis of the cable. However, the conventionally proposed laying means has the drawback that it is difficult to rotate the cable supply means around the suspension line while maintaining weight balance.

An object of the present invention is to provide a cable installation device capable of laying a new cable into an empty cable insertion space extending spirally around the axis of a suspension line without rotating the cable supply means around the suspension line. It is in.

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cable installation device 10 according to the present invention.
As shown in FIG. 3, the hanging wire 12 on which a new cable is to be laid by this device has a plurality of cable insertion spaces 16, 16', 16'' around the tension member 14. a plastic covering 1 integrally formed to form
In the example shown in FIG. 3, the cable 20 is already inserted into one cable insertion space 16, and the cable 20 is already inserted into the other two cable insertion spaces 1.
6', 16'' are empty, and cut-shaped entrances 16'a, 16''a are provided in these spaces.

The cable installation device 10 includes a cable pushing means 22 which is attached to the hanging wire 12 so as to be freely movable, and a cable 2 to be newly laid on the cable pushing means 22.
0'. The cable pushing means 22 comprises a holder 28 having a roller 26 which engages the suspension line in a rolling manner, as already proposed, and a cable insertion space, for example 16', which is attached to this holder and has an entrance 16' of the suspension line. The cable 20' is inserted into the cable insertion space 16' through the entrance 16'a, which is pushed and expanded by the expansion jig 30. Inserted and installed. In the illustrated embodiment, the cable supply means 24 includes a frame 32 mounted on the suspension line 12 and suspended from the suspension line 12 so as to be freely movable, and a feeding drum 34 rotatably supported by the frame 32. The cable 20' is paid out from the payout drum 34 by its rotation. Furthermore, frame 32
The plurality of horizontal rods 32a have the function of preventing the cable 20' from unraveling excessively, and when the cable 20' is pulled to the right in FIG. A caster 36 is attached to the right end of the delivery drum 34 to prevent engagement.

The cable installation device 10 of the present invention has a cable insertion space 1
6, 16', 16'' extend spirally around the axis of the hanging wire 12 in a twisted state, and the cable pushing means 2
The cable 20' is further provided with winding means 38 for winding the cable 20' as the cable 20' rotates along the spiral of the cable insertion space. This winding means 38 consists of a cylindrical body 40 arranged concentrically on the hanging wire 12;
In the illustrated embodiment, this cylindrical body 40 has radial notches 42a, 42'a (4
2a not shown).
2' and a plurality of rollers 44 rotatably supported between these end plates (see FIG. 2). One end plate 42 is fixed to the frame 32 of the cable supply means 24, and the holder 28 of the cable pushing means 22 is connected to the other end plate 42' via a rotary joint 46.

The cable feeding means 24 has a gutter-shaped cable feeding guide 48 that guides the cable 20' fed out from the feeding bobbin 34 to near the outer periphery of one end of the cylindrical body 40 of the winding means 38, and also has a cable feeding guide 48 in the form of a trough that guides the cable 20' fed out from the feeding bobbin 34 to the vicinity of the outer periphery of one end of the cylindrical body 40 of the winding means 38.
has a similarly gutter-shaped cable receiving guide 50 that receives the cable 20' fed out from the cable feeding guide 48 near the outer periphery of the other end of the cylindrical body 40.

As shown in FIG.
The cable 20' that has been fed out from the cable feeder and passed through the cable feeding guide 48 is guided directly to the cable receiving guide 50 and inserted into the empty cable insertion space, for example 16', of the hanging wire 12 through the cable pushing means 22 for use. In this state, when the frame 32 of the cable supply means 24 is pulled from the ground to the left in FIG.
0' is continuously fed into the cable pushing means 22 and inserted into the cable insertion space 16', but if the cable insertion space 16' extends spirally, the cable pushing means is not engaged with the entrance 16'a. It rotates together with the pushing and expanding jig 30 that is inserted. On the other hand, since the cable supply means 24 and the winding means 38 do not rotate, the cable 20' is wound between the guides 48 and 50 on the cylindrical body 40 of the winding means 38, as shown in FIG. In this case, since the cable 20' engages with the roller 44, the tension during installation does not increase.
It is preferable to use a plurality of rollers 44 whose outer diameters become narrower on the pushing means side, or to narrow the distance between them. Further, these rollers 44 are connected to the end plate 4
It may be a cylinder rotating about its axis between 2 and 42'. In this case, the sleeve is provided with a longitudinal notch at one location in the circumferential direction.

In this way, the cable 20' is laid in the spirally extending cable insertion space, but once the cable 20' has been laid for one span, the entire apparatus is removed from the suspension line and moved to the next span. At this time, the portion wound around the winding means 38 is loosened. In addition, instead of pulling the frame of the cable supply means from the ground, the device is equipped with a battery-driven motor,
The rollers or caterpillars that suspend the entire device in contact with the suspension line may be rotated so that the entire device can move by itself.

Further, in the above embodiment, the cable supply means 24 is mounted on the suspension line 12, but it may be installed on the ground.

According to the present invention, as described above, it is possible to smoothly install a new cable into the spirally extending cable insertion space of the suspension wire, and also to move a heavy cable supply means around the suspension wire during installation. Since there is no need to rotate, work can be carried out safely without losing balance on the suspension line.

[Brief explanation of the drawing]

FIG. 1 is a side view of the cable installation device according to the present invention, FIG. 2 is an enlarged right end view of the winding means, and FIG. 3 is an enlarged sectional view of the suspension wire. 10... Cable installation device, 12... Hanging wire, 1
6', 16''...Cable insertion space, 16'a, 1
6″a...Entrance, 20'...Cable, 22...Cable pushing means, 24...Cable supply means, 3
0... Pressing and expanding jig, 32... Frame, 34... Feeding drum, 38... Winding means, 40... Cylindrical body,
46...Rotary joint, 48...Cable feeding guide, 50...Cable receiving guide.

Claims (1)

[Scope of Claims] 1. A cable pushing means that runs along an existing suspension line having a cable insertion space and pushes the cable into the cable insertion space while pushing and expanding the entrance of the cable insertion space, and a cable supplying means. The cable installation device further includes a winding means that is arranged concentrically with the suspension line and runs along the suspension line, but whose circumferential surface can rotate around the suspension line, and the cable pushing means has a rotary joint. The cable feeding means has a cable feeding guide that guides the cable from the cable feeding means to near the outer periphery of one end of the winding means, and the cable pushing means has a cable feeding guide connected to the winding means through the cable feeding means. An optical cable installation device comprising a cable receiving guide for receiving a cable fed out from the winding means near the outer periphery of the other end of the winding means. 2. The cable supply means comprises a frame movably suspended from the hanging line and a payout bobbin rotatably supported by the frame, and the winding means is fixed to the frame of the cable supply means. An optical cable installation device according to claim 1. 3. The optical cable installation device according to claim 1, wherein the cable winding means comprises a plurality of rollers rotatably supported between a pair of end plates having radial notches. 4. The optical cable installation device according to claim 3, wherein the roller has an outer diameter that is narrower on the pushing means side. 5. The optical cable installation device according to claim 3, wherein the distance between the rollers is narrower on the pushing means side. 6. The optical cable installation device according to claim 1, wherein the cable winding means comprises a cylinder rotatably supported between a pair of end plates having radial notches.