JPH0125281B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a cable laying vehicle that is provided with a cable reel on a vehicle and sequentially sends out and lays cables from there, and a cable laying method using the same.

[Prior art and its problems]

Conventional cable laying vehicles are made to lay only one cable and only hold one reel. It didn't exist.

Therefore, when installing multiple types of cables, such as electric wires and optical fiber cables, the work must be repeated twice or two installation vehicles must be used, which is extremely troublesome. On the other hand, when a cable is laid across a road or the like, if the surface is excavated, it causes inconveniences such as hindrance to traffic.

[Purpose of the invention]

The first object of the present invention is to eliminate the disadvantages of the conventional example and to hold cable reels in parallel so that different types of cables can be laid in parallel at the same time, and to provide a simple and compact device for this purpose. It is possible to easily and reliably attach and detach the cable reel to each reel, and not only can the cable be fed out from the reel and laid safely, but also the cable can be wound up. The objective is to provide a cable laying vehicle that can be used for special construction methods.

A second object of the present invention is that when a cable is buried across a road as a special construction method, the cable can be unwound from the ground using the cable laying vehicle, and the cable can be buried without excavation. An object of the present invention is to provide a cable laying method that allows cables to be buried under a road without being cut.

[Key points of the invention]

However, according to the present invention, the purpose of the lever is to include an arm for holding a plurality of cable reels in parallel with a bearing provided at its tip, and a sprocket having a piece for engaging and disengaging the cable reel attached to this arm.
A cable-laying vehicle is constructed with a drive device that can rotate the sprocket in either forward or reverse directions.In addition, when laying cables under a road, etc., a vertical shaft for work is installed on both sides of the road, etc. These vertical shafts are connected by a conduit inserted by pressure method from one side, and a reel with a cable wrapped in it is rotatably installed on the ground on one side of the shaft, and A cable laying vehicle of the present invention equipped with an empty reel is placed on the ground on the mine side, the empty reel on the laying vehicle side is reversed, and the cable is attached to the empty reel via a guide string that has been passed through the conduit in advance. This is accomplished by winding up the reel, then rotating the reel in the normal direction and continuing normal laying with the laying vehicle.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a front view showing an embodiment of the cable laying vehicle of the present invention, and Fig. 2 is a side view of the same. It is similar to that used. 2 is an arm attached to the front end of the vehicle main body 1 as an attachment, and is composed of a set of branch arms 2a, 2b, 2c arranged in parallel with an interval, and holds cable reels 5, 5' as described later; A guide roller 4 guides the cables 23 and 24 pulled out from the reels 5 and 5' to the rear of the vehicle body 1, and a guide roller 4 guides the cables guided by the guide roller 3 attached to the rear end of the vehicle body 1
This shows a laying machine that sequentially buries the ground underground as it moves.

The arms 2a, 2b, 2c are located at the left, right and center, respectively, and the left arm 2a and the center arm 2
c, the right arm 2b and the center arm 2c form a pair,
Cable reels 5 and 5' are connected between these pairs of arms.
The reels 5 and 5' are held in parallel by being sandwiched between both ends of each shaft 6.

This holding structure includes arms 2a, 2b, 2
A bearing part for receiving the 6 ends of the shafts of the reels 5, 5' is attached to the tip of the reel c, and as shown in FIGS. It consists of a pin 8 which is detachably disposed so as to close the upper opening of the pin 7. Although not shown in the drawings, the bearing portion is attached to each arm 2a, 2b, 2
c, and in particular, the central arm 2c is attached to both left and right ends. Further, in order to ensure safety and ease of setting, the pin 8 is provided with a locking mechanism using a spring or the like, but as an example, it is also possible to engage and disengage the pin 8 using a hydraulic jack system.

A sprocket 13 is rotatably attached to the tip of the arm 2 via a bush 13a, and a piece 15 that is pivoted to a bracket 14 is attached to the inner surface of the sprocket 13, as shown in FIG. This piece 15
has a notch 15a at the tip, and when raised horizontally, the cross support 5a of the cable reel 5, 5'
(See FIG. 5) is inserted into this notch 15a to engage and disengage the reels 5, 5' and the sprocket 13. Also, sprocket 13
A stopper 16 is provided on the side for stopping the engaging/disengaging piece 15 in a horizontal standing position, and a sprocket 13 is also provided.
A tension spring 1 has one end fixed to the engagement piece 15 and the other end fixed to the engagement/disengagement piece 15.
7 is provided so as to maintain the state when the engaging/disengaging piece 15 is vertically fallen, and to bias the engaging/disengaging piece 15 to assist its rotation when the engaging/disengaging piece 15 is raised.

In addition, each sprocket 13 has an engaging/disengaging piece 1.
A plurality of sprockets 5 are provided vertically facing each other, and as a matter of course, the axis of the sprocket 13 is positioned so as to coincide with the center of the shaft 6 of the cable reel 5, 5' which is housed in the U-shaped receiving part 7. .

On the other hand, at the base of the arm 2 is a gear motor 18, which is part of the drive device, and a speed reducer 1 connected to the gear motor 18.
An endless chain 21 is provided to connect the sprocket 13 with the sprocket 20 attached to the rotating shaft of the speed reducer 19. In the figure, 22 is an idler that applies tension to the endless chain 21. As shown in FIG. 1, the gear motor 18 is connected via a hydraulic pipe 26 to a control device 27 provided in the driver's seat 1b of the vehicle body 1, and the control device 27 controls the forward and reverse rotation direction and rotation speed. controlled.

In addition, these mechanisms are connected to the left and right arms 2a, 2b.
or the central arm 2c.
A plurality of coefficients may be provided.

Next, to explain how to use and function, the cables 23 and 24 are of different types and diameters, such as an electric wire cable and an optical fiber cable, and the cable reels 5 and 24 have different diameters.
With the cables 23 and 24 wound around each of the cables 5', a common shaft 6 is inserted into the center to arrange them in parallel, and a hook 25 is hooked to the cables 23 and 24, and the cables 5' are hoisted horizontally by a crane to the inside of the arm 2.

To fix the shaft 6 suspended in this way to the arms 2a, 2b, 2c, remove the pin 8 that had been inserted into the U-shaped receiving part 7, and insert the reel 5, Insert the end of shaft 6 of 5'. Then, when the pin 8 is set again, the end of the shaft 6 is prevented from falling off by the pin 8.

In addition, the engaging/disengaging piece 15, which had been laid down parallel to the sprocket 13, is raised to a right angle by hand, and the support 5a of the cable reel 5, 5' is fitted into the notch 15a, thereby connecting the sprocket 13 and the reel 5, 5'. . The engaging/disengaging piece 15 is kept raised by a spring 17.

When the vehicle body 1 is running with the reels 5 and 5' set in this way, if the gear motor 18 is driven to rotate in the normal direction and the sprocket 13 is rotated in the normal direction, the rotational force is transferred to the cable via the engagement piece. The cables 23, 24 are transmitted to the struts 5a of the reels 5, 5', rotate the reels 5, 5' together with the sprocket 13, and the cables 23, 24 are pulled out and sequentially buried in the ground by the laying machine 4 at the rear.

By the way, when cable reels have different diameters, such as electric wire and optical fiber cable, it is not possible to install the reels 5 and 5' at the same time unless the rotational speeds of the reels 5 and 5' are set separately. Motor 1 at 27
This is done by adjusting the speed of 8.

Furthermore, if the motor 18 is reversely rotated by the control device 27, the empty reels 5, 5' can be reversely rotated and the cables 23, 24 can be wound there. An example of the construction method of the present invention, which is an example of a special construction method using such reverse rotation, is shown in FIG. 6. When cables 23 and 24 are laid across under a road 28, etc. Carrying out construction work through excavation has many inconveniences, such as creating an obstruction to traffic.

Therefore, there are vertical shafts 29 for work on both sides of the road 28.
29', and the pipes 30, 30' are inserted into the vertical shafts 29, 29' by applying pressure from one side.
reels 31, 31' connected to each other with cables 23, 24 wound in advance on the ground outside one shaft 29;
is suspended by a crane or the like so that it can rotate freely, and the cable-laying vehicle of the present invention equipped with empty reels 32, 32' is placed on the ground outside the other shaft 29'. And this empty reel 32,
32' is wound with guide strings 33, 33' in advance, the reels 32, 32' are rotated in the normal direction to pull them out, and the guide strings 33, 33' are manually passed through the conduits 30, 30'. cables 23, 24
Tie it to the tip of the Then, the reels 32, 32' are reversed and the cables 23, 24 are wound up leaving only the length between points A and B. Thereafter, the cables 23 and 24 are finally passed through the laying machine 4, and the reels 32 and 32' are rotated in the normal direction to continue burying the cables in the normal position. In this way, the cable can be laid safely without cutting the cable in the middle.

Note that point A in the middle of FIG. 6 is a point where both cables are connected at the same time and is closest to the road 28. Therefore, long cables need to have an integral multiple of the length of short cables.

〔Effect of the invention〕

As described above, the cable laying vehicle of the present invention is
Two types of cables can be laid at once using two cable reels, and the mechanism for doing so is simple and compact and does not take up much space, and the cable reels can be set up easily and quickly. In addition, it can be used not only for sending out the cable but also for winding it up, so it can be used for special construction methods and has good workability.

In addition, the cable laying method of the present invention, which is such a special construction method, does not require excavating the ground surface and causing traffic obstruction when laying a cable across a road, etc., and also eliminates the risk of cutting the cable midway. It can be installed safely and efficiently without any problems.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the cable laying vehicle of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a partially cutaway plan view of the main part, and Fig. 4 is a side view of the main part. 5 is a side view showing an example of a cable reel, and FIG. 6 is a plan view showing an embodiment of the cable laying method of the present invention. 1...Vehicle body, 1a...Crawler track, 1b...Driver's seat, 2
...Generic name of arms, 2, 2a, 2b, 2c...Each arm, 3...Guide roller, 4...Laying machine, 5, 5'...
Cable reel, 5a... Support, 6... Shaft, 7
...U-shaped receiver, 8...pin, 13...sprocket,
13a... Bush, 14... Bracket, 15... Engagement/disengagement piece, 15a... Notch, 16... Stopper, 17
...Spring, 18...Motor, 19...Reducer, 20...
Sprocket, 21... Endless chain, 22... Idler, 23, 24... Cable, 25... Hook,
26... Hydraulic piping, 27... Control device, 28
...road, 29,29'...vertical shaft, 30,30'...conduit, 31,31',32,32'...reel, 33,
33'...Guide string.

Claims (1)

[Claims] 1. An arm that holds a plurality of cable reels in parallel with a bearing section consisting of a U-shaped receiving section provided at the tip and a removable pin that closes this opening, and a cable attached to this arm. It consists of a sprocket with a piece for engaging and disengaging the reel, a hydraulic motor attached to an arm that can rotate in either forward or reverse directions, a reducer, and a control device installed in the driver's seat of the vehicle. A cable laying vehicle characterized by comprising a drive device that is rotatably driven and whose speed can be adjusted. 2. When laying a cable under a road, etc., create a working shaft on both sides of the road, etc., connect these shafts with a conduit inserted by pressure method from one side, A reel with cable wrapped in it is rotatably installed on the ground on one side, and a bearing installed at the tip on the ground on the other shaft side.
An arm for holding a plurality of cable reels in parallel, a sprocket attached to the arm and having a piece for engaging and disengaging the cable reels, and the sprocket can be rotated in either forward or reverse directions and the speed can be adjusted. A cable-laying vehicle consisting of a drive device and a cable-laying vehicle is placed, an empty reel is attached to the cable-laying vehicle, and the empty reel on the cable-laying vehicle side is reversed.
The cable is wound onto this empty reel through a guide string that has been passed through the conduit in advance, leaving the necessary length, and the reel is then rotated in the normal direction to continue normal laying with the installation vehicle. Characteristic cable laying method.