JP2001016733A - Pneumatic device for laying cables - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive pneumatic device which can perform smooth laying work of cables. SOLUTION: This is a pneumatic device for laying cables, which lays members to be pressure-sent such as plural lines of cables, pipes, or the like within a sheath pipe 8 by catapillar devices 4a and 4b, and when the outside diameters of the plural lines of cables 3a and 3b as the members to be pressure- sent are different, the vertical positions of catapillars 4a-2 and 4b-2 can be adjusted with upper and lower position adjusting handles 4a-3 and 4b-3 as the adjusting means, so the cables 3a and 3b are held surely, and also the velocities of the plural catapillar become the same and the laying velocities of the plural members to be pressure-sent become the same since the pipes to the plural hydraulic motors to rotate the plural catapillar are all connected in series by high-pressure hoses, so that they can be driven with one power unit, thus the occurrence of zigzag traveling is prevented, and this device can perform a smooth laying work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic device for laying multiple strips.

[0002]

2. Description of the Related Art When an information communication optical cable is buried in soil, it is generally laid in a polyethylene or steel sheath tube to protect the optical cable from external pressure, water and the like. As a method of laying the air, recently, a pneumatic feeding method that can be laid a long distance and does not exert an excessive tension on the optical cable has been spotlighted.

FIG. 4 is a conceptual view of a conventional pneumatic pressure feeding device for laying multiple strips.

When a plurality of optical cables and the like are laid at the same time by the pneumatic feeding method using this type of apparatus, a plurality of caterpillar devices 4a and 4b are separately driven by a plurality of power units 5a and 5b to form a plurality of optical cables 3a. ,
Generally, 3b and the like are fed into the sheath tube 8 through the pressure feed head 6 and the branching jig 7 in the direction of the arrow 20. Although FIG. 2 shows the case where two optical cables 3a and 3b are laid, the power unit 5 may have a plurality of optical cables 3a and 3b.
a, 5b and the number of the caterpillar devices 4a, 4b are increased, but their basic configurations are the same. The optical cables 3a and 3b sent to the pressure feed head 6 ride on a high-pressure air flow supplied from a compressor (not shown) and are laid in the sheath tube 8.

[0005]

By the way, in the conventional multi-pneumatic pneumatic feeding apparatus shown in FIG. 4, a plurality of optical cables 3a and 3b to be laid are integrated at a tip, so that two caterpillars 4a and 4b are provided. If one of the speeds is faster, the faster optical cable will travel, the slower optical cable will act as a brake, and the detour will proceed with offset, eventually causing a problem that the installation of the optical cables 3a and 3b will stop. Would.

Therefore, in order to avoid such troubles, the operator always keeps the two caterpillars 4a, 4a and 4b so that the feed speeds of the two optical cables 3a and 3b are equal.
It is necessary to manually adjust and synchronize the speed of b. This operation is very troublesome in a situation where the speed changes frequently. For this reason, a method of always detecting the installation speed of the two optical cables 3a and 3b and automatically controlling the two to be equal has been considered. However, the control device is expensive and the measurement of the installation speed is generally performed in a certain unit. In order to take the average value over time, there are variations and time delays in the measured values, and based on these measured values, to control the laying speed of the two optical cables,
In such a case, the two optical cables 3a and 3b meander repeatedly, and there is a problem that it is difficult to lay the cables smoothly.

It is an object of the present invention to solve the above-mentioned problems and to provide a multi-layer pneumatic feeding apparatus capable of performing an inexpensive and smooth multi-layer laying operation.

[0008]

In order to solve the above-mentioned problems, if a plurality of pressure-feeding members can be fed by one caterpillar, the speed at which the pressure-feeding members are laid out is the same, and the simplest is the simplest. As a solution, in this case, if the outer diameters of the pressure-feeding members are different from each other, it is difficult to reliably hold the members by one caterpillar. Therefore, in order to achieve the above-mentioned object, a multi-strand pneumatic feeding device of the present invention includes a multi-strand pneumatic feeding device for laying a plurality of pressure-receiving members such as optical cables or pipes simultaneously in a sheath tube. The pipes to the hydraulic motors for driving a plurality of upper and lower caterpillars to be fed so as to sandwich each pressure-supplying member are connected in series by a high-pressure hose, and the hydraulic pressure is supplied from one power unit. In addition, the lower track or the upper track can be shared, but in this case, an adjusting means for independently adjusting the vertical position of the opposite track is provided.

According to the present invention, when the outer diameter of a plurality of optical transmission members such as optical cables or pipes is different, the vertical position of the caterpillar can be adjusted by the adjusting means, so that the member to be pressure-transmitted is securely gripped. At the same time, since the speeds of the plurality of tracks are the same, generation of meandering of the plurality of pressure-receiving members can be prevented, and a smooth multi-layer laying operation can be performed.

[0010]

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

FIG. 1 (a) is a conceptual view showing an embodiment of an air pressure feeding device for laying multiple strips according to the present invention, and FIG. 1 (b) is a top view surrounded by an ellipse in FIG. 1 (a). is there.

[0012] The multi-layer pneumatic feeding device is provided in a sheath tube.
At the same time, a plurality of optical cables 3a, 3
b.
An upper and lower two-stage caterpillar device 4a, 4b for feeding the optical cables 3a, 3b so as to sandwich the optical cables 3a, 3b, and hydraulic motors 9, 10, 11 (see FIG. 3) for driving the caterpillar devices 4a, 4b (see FIG. 3) and hydraulic motors 9 to 11 are connected in series. High-pressure hose connected to the motor and supplies hydraulic pressure to the hydraulic motors 9 to 1
Power units 5 and upper caterpillars 4a-2, 4
It is provided with vertical position adjusting handles 4a-3 and 4b-3 (see FIG. 2) as adjusting means for independently adjusting the vertical position of b-2.

The drum 1a is rotatably supported by a jack 2a. The optical cable 3a is taken out by the caterpillar device 4a, fed out of the drum 1, and fed to the pressure feed head 6.
Is pushed into. High-pressure air (air) is supplied from a compressor (not shown) into the pressure feeding head 6.
The optical cable 3 is introduced into the sheath tube 8 via the branch jig 7 by riding the high-pressure air flow.

Similarly, the drum 1b is rotatably supported by a jack 2b. The optical cable 3b is taken up by the caterpillar device 4b, fed out of the drum 1b, and introduced into the sheath tube 8 via the branch jig 7.

Both ends of the optical cable 3a and the optical cable 3b are integrated and are laid at the same time in the sheath tube 8.

FIG. 2 is an enlarged front view taken along the line AA of the pneumatic pressure feeding device for laying multiple strips shown in FIG. FIG. 3 is a hydraulic circuit diagram of a hydraulic motor system of the pneumatic pressure feeding device for multi-laying shown in FIG.

The lower caterpillars 4a-1 and 4b shown in FIG.
-1 has a structure driven by one common hydraulic motor 9, and is substantially an integral type. On the other hand, the upper caterpillars 4a-2 and 4b-2 have a separate structure, and are driven by independent hydraulic motors 10 and 11, respectively.

The three hydraulic motors 9 to 11 have the same amount of oil discharged per rotation and have a hydraulic circuit as shown in FIG.
Are connected in series as shown in FIG.
The hydraulic pressure is supplied and driven from one common hydraulic pump 12 driven by the three hydraulic motors 9 to 11 unless a trouble such as oil leakage occurs in the hydraulic circuit. Rotates at exactly the same speed.

On the other hand, the upper caterpillars 4a-2 and 4b-2
Are separated and are connected by high-pressure hoses, so that the degree of freedom to move up and down independently is ensured. Therefore, even when the outer diameters of the optical cables 3a and 3b are different, the upper caterpillars 4a-2 and 4b can be separately adjusted by adjusting the vertical position adjustment handles 4a-3 and 4b-3.
2 can be set independently and arbitrarily, and the optical cables 3a and 3b are respectively connected to the caterpillar device 4 at an appropriate pressure.
a, 4b can be tightened.

Since the pneumatic feeding device for laying multiple strips has the above structure, the two caterpillar devices 4a, 4b
Always rotates at the same speed, and the caterpillar devices 4a, 4a
b optical cable 3a forcibly sent out by b.
Since 3b is always pushed into the sheath tube at the same speed without adding an expensive automatic control system and without the need for manual monitoring and adjustment, the installation work can be performed extremely smoothly without meandering.

Although FIG. 1 shows the case where two optical cables are laid, the invention is not limited to this.
Even in the case of three or more rows, the same effect can be obtained only by increasing the number of tracks and the number of entrances of the branching jig.

In this embodiment, the case where two optical cables are laid is shown. However, the present invention is not limited to this. For example, one optical cable is used, and the other optical pipe is used to prevent freezing failure. It may be.

Further, in the present embodiment, the two caterpillars are configured as two lower caterpillars (integrally used for hydraulic motors) and two upper caterpillars are separated (independently of hydraulic motors). However, even if the upper and lower caterpillars are integrated and the lower caterpillars are separated, the functions are exactly the same.

Further, in the present embodiment, the hydraulic motor of the lower caterpillar is shared as the structure of the two caterpillars. However, the present invention is not limited to this, and the individual hydraulic motor is used for each lower caterpillar. A separate type may be used. In this case, if all the hydraulic motors are connected in series with a high-pressure hose, the function does not change.

According to the present invention, the hydraulic circuits of the respective hydraulic motors for driving a plurality of caterpillars are connected in series, and the hydraulic pressure is supplied from one common hydraulic pump. The hydraulic motors all rotate at the same speed, and the tracks driven by these hydraulic motors also have the same speed.

Therefore, a plurality of pressure-feeding members such as optical cables or pipes sent out by the plurality of caterpillars are all fed into the sheath tube at the same speed. Extremely smooth installation work can be performed.

[0027]

In summary, according to the present invention, the following excellent effects are exhibited.

[0028] It is possible to provide a pneumatic feeding device for multi-layer laying that can perform a smooth multi-layer laying operation.

[Brief description of the drawings]

FIG. 1 (a) is a conceptual diagram showing an embodiment of a pneumatic pressure feeding device for multi-layer laying of the present invention, and FIG. 1 (b) is a partial top view of FIG. 1 (a).

FIG. 2 is an AA diagram of the pneumatic pressure feeding device for multi-layer laying shown in FIG.
It is a line expansion front view.

FIG. 3 is a hydraulic circuit diagram of a hydraulic motor system of the multi-layer pneumatic pressure feeding device shown in FIG.

FIG. 4 is a conceptual diagram of a conventional pneumatic pressure feeding device for laying multiple strips.

[Explanation of symbols]

1a, 1b Drum 2a, 2b Jack 3a, 3b Optical cable (compressed member) 4a, 4b Caterpillar device 4a-1, 4a-2, 4b-1, 4b-2 Caterpillar 4a-3, 4b-3 Vertical position adjustment handle ( Adjusting means) 8 sheath tube

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masatoshi Kumagai 5-9-1-15 Hidaka-cho, Hitachi City, Ibaraki Prefecture F-term (reference) in Hitachi Cable Engineering Co., Ltd. 3F051 CA01

Claims (2)

[Claims] 1. A plurality of upper and lower members for feeding a plurality of pressure-feeding members used in a multi-layer laying air pressure-feeding device for simultaneously laying a plurality of pressure-feeding members such as optical cables or pipes in a sheath tube.
In a step-type caterpillar, a plurality of hydraulic motors for driving the respective caterpillars are connected in series, and hydraulic pressure is supplied from a single power unit. 2. The method according to claim 1, wherein the lower or upper track is replaced by a wide track instead of the plurality of tracks.
2. The multi-layer pneumatic feeding apparatus according to claim 1, wherein the upper and lower caterpillars are shared by a stand, and each of the upper and lower caterpillars is provided with a means for adjusting a position in a vertical direction.