JPH05328560A - Method and apparatus for laying wire - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a laying method and a laying device that do not require a supply reel, a pressure feed head, and a control device and can easily lay a communication wire rod. [Structure] In the method of laying the wire rod 3, an airtight chamber 2 is provided on the wire rod insertion side of the pipe 4, the wire rods 3 are spirally bundled and housed therein, and the end of the wire rod is inserted into the end opening of the pipe 4. The airtight chamber is connected to generate a fluid flow in the pipe 4, and the spirally bundled wire 3 is unwound and laid inside the pipe 4. The wire rod laying device is provided on the side of the pipe 4 where the wire rod 3 is inserted, and the wire rod delivery unit 5 that houses the wire rods 3 in a spiral bundle, and the end opening of the pipe 4 that accommodates the wire rod delivery unit 5. A cylinder 2 which is made to enter the end of the wire rod and is hermetically connected to the pipe 4, and a pipe which is connected to one end opening of the pipe 4 through the cylinder 2 or directly connected to the other end opening of the pipe 4 4 and a gas flow generator 1 for generating a gas flow.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire laying method and a wire laying device, and more particularly, to a communication wire having a small diameter such as an optical fiber to be laid by a gas flow in a pipe laid in advance. The present invention relates to a wire laying method and a wire laying device that can be easily laid.

[0002]

2. Description of the Related Art Conventionally, when laying a communication wire rod such as an optical fiber, a pipe is laid in advance at a laying place and the wire rod is laid inside the pipe. As this conventional laying technique, there is a method described in JP-A-59-104607. This method will be described with reference to FIG.

In FIG. 5, 1 is a compressor, 3 is a communication wire, 4 is piping, 11 is a wheel, 12 is a pressure feed head, 13 is a control device, 14 is a supply reel, and 15 is a compressed air introduction pipe. In this wire laying method,
The communication wire 3 is a supply reel 14 placed under atmospheric pressure.
And is supplied to the pipe 4 through the pressure feed head 12. The compressor 1 is connected to the pressure feeding head 12 via a compressed air introducing pipe 15, and the compressed gas flow pressurized by the compressor 1 is supplied into the pressure feeding head 12 via the compressed air introducing pipe 15.

The compressed air introduction pipe 15 is connected to the pipe 4 in the pressure feed head 12, and the compressed gas flow pressurized by the compressor 1 flows in the pipe 4. Then, the communication wire 3 is moved in the pipe 4 by the compressed gas flow, so that the communication wire 3 is laid inside the pipe 4. Further, when the laying of the wire rod 3 progresses, the wire rod 3 is pulled out from the supply reel 14 by the wheel 11 provided in the pressure feeding head 12.

As described above, in the method of laying the communication wire rod 3 in the pipe 4 by utilizing the flow of compressed air, the propulsive force of the wire rod 3 is dispersed substantially evenly in the length direction, and a large tension is applied to the wire rod 3. This is an extremely advantageous method because it can be laid inside the pipe 4 without causing any trouble.

[0006]

However, in such a conventional wire laying method, since the air flow is generated only in the pipe 4, the compressor 1 is operated by the pressure feed head 12.
Control the flow of compressed air from one direction, that is, the compressed air flows only in the extension direction of the pipe 4, and the supply reel 1
Since it must be controlled so as not to flow to the side, there is a problem that the structure of the pressure feeding head 1 becomes complicated. Further, it is necessary to rotate the supply reel 14 as the laying of the wire rod 3 progresses, and for this reason, it is necessary to provide the wheel 11 inside the pumping head 12, which complicates the structure of the pumping head 12.

Thus, in the conventional wire laying method,
A large-scale device such as the supply reel 14, the pressure feeding head 12, and the control device 13 is required, and it is difficult to assemble the laying device. Further, since the pumping site is generally a narrow place, it is difficult to install the laying device, and there is a problem that the construction cost increases.

Therefore, the present invention solves the problems in the conventional wire laying method, and can easily lay a communication wire without using a supply reel or a pressure feed head and without using a control device. An object of the present invention is to provide a new wire laying method and a new wire laying device.

[0009]

A wire rod laying method of the present invention for achieving the above object is to install a wire rod in a previously laid pipe by inserting the wire rod from one end opening of the pipe. An airtight chamber is provided on the side to be inserted and the wire rods are spirally bundled and housed therein, and the airtight chamber is attached to the pipe in a state where the end portion of the wire rod has entered the end opening of the pipe. The connection is made, and in this state, a fluid flow is generated in the pipe, and the wire rod is laid inside the pipe while unwinding the spirally bundled wire rod.

Further, the wire rod laying device of the present invention for achieving the above object is a device for laying a wire rod by inserting the wire rod into the previously laid pipe from one end opening of the pipe, and inserting the wire rod. A wire rod delivery section which is provided on the side and accommodates the wire rods bundled in a spiral shape, and the wire rod delivery section,
A cylinder airtightly connected to the pipe in a state where the end of the wire has entered the end opening of the pipe, and one end opening of the pipe via the cylinder, or the other end of the pipe. A gas flow generation device that is directly connected to the end opening and that generates a gas flow in the pipe, and is configured to lay the wire rod in the pipe while unwinding the spirally bundled wire rod. It is characterized by

[0011]

According to the wire laying method and the wire laying apparatus of the present invention, the communication wire rods to be laid in the pipe are bundled in a spiral shape and housed in the wire rod feeding portion provided on the side where the wire rods are inserted. The wire rod feeding unit is built in a cylinder airtightly connected to the pipe in a state where the end portion of the wire rod enters the end opening of the pipe. Then, by the gas flow introduced into the pipe by the gas flow generator, the spirally bundled wire rod is unwound and moves in the pipe, whereby the wire rod is laid inside the pipe.

[0012]

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

FIG. 1 is a view for explaining a method and apparatus for laying a communication wire rod according to a first embodiment which best represents the features of the present invention. FIG. 1 (a) shows the overall structure of the present invention, where 1 is a compressor (which may be an air cylinder) which is a gas flow generator, 2 is a cylinder, 3 is a communication wire rod, 4 is pre-laid piping, and 15 is a pipe. Is a compressed air introduction pipe for guiding the compressed air from the compressor 1 to the cylinder 2. The internal structure of the cylinder 2 is as shown in FIG. 1 (b), and the wire rod feeding unit 5 in which the communication wire rods 3 are spirally bundled and housed is provided inside. Then, one end of the cylinder 2 is airtightly connected to the compressed air introduction pipe 15, and the other end is connected to the pipe 4 via the airtight cap 7.

The other end of the cylinder 2 is attached to the airtight cap 7
The reason for connecting to the pipe 4 via the is that the communication wire rods 3 are bundled and housed in the wire rod sending portion 5 in a spiral shape before the cylinder 2 is connected, which will be described with reference to FIG.

As shown in FIG. 2 (a), in order to bundle the communication wire rods 3 in the wire rod feeding portion 5 in a spiral shape and accommodate them, a large opening is formed at one end of the cylinder 2 and the wire rod feeding portion 5. 2a,
There is 5a. The communication wire 3 is spirally wound around the center member 6, and the communication wire 3 remains spirally wound around the center wire 6 through the large openings 2a and 5a as shown in FIG. 2 (b). It is inserted into the wire rod sending unit 5. And this Figure 2
In the state of (b), the cylinder 2 is transported to the wire laying site,
Before starting the assembly of the laying device, only the central member 6 is pulled out of the wire rod delivery part 5. Even if the central member 6 is pulled out from the communication wire 3, the communication wire 3 does not collapse toward the center due to its own elastic force, and maintains the spirally bundled shape as shown in FIG. 2 (c). To do. The airtight cap 7 is for connecting the large opening 2a of the cylinder 2 to the pipe 4 with good airtightness. When the cylinder 2 is connected to the pipe 4, the communication wire 3 is attached to the end opening of the pipe 4.
The cylinder 2 is airtightly connected to the pipe 4 by the airtight cap 7 in a state where the end of the cylinder 2 is inserted.

The communication wire 3 has a structure in which an optical fiber element wire 9 is covered with a jacket 10 as shown in FIG. 4, for example.

At the wire laying site, the cylinder 2 in the state shown in FIG. 2 (c) is connected to the compressor 1 via the compressed air introducing pipe 15 as shown in FIG. 1 (b), and the opening 2a of the cylinder 2 is provided. The side is connected to the pipe 4 via an airtight cap 7. At this time, the cylinder 2 is hermetically connected to the pipe 4 with the end portion of the communication wire 3 being inserted into the end opening of the pipe 4. After this, compressed air is sent from the compressor 1.

The compressed air enters the cylinder 2 through the compressed air introduction pipe 15 and then flows through the pipe 4, and the flow of the compressed air in the pipe 4 transfers the communication wire 3 from the cylinder 2 to the pipe 4. .. The communication wire rod 3 is gradually unwound from the spirally bundled state and supplied from the wire rod delivery unit 5 into the pipe 4, and at this time, the wire rod delivery unit 5 or the spirally bundled wire rod itself rotates. As a result, the communication wire rod 3 supplied into the pipe 4 is not twisted.

After it is confirmed that the communication wire 3 is completely laid inside the pipe 4, the compressor 1 is stopped to stop the delivery of the compressed air, whereby the transfer of the communication wire 3 is stopped.

In this way, the communication wire 3 can be easily laid with compressed air, and the supply reel 14, the pressure feed head 12, and the controller 1 shown in FIG.
No need for equipment such as 3
Control becomes unnecessary, and the number of personnel required to lay the communication wire rod 3 can be reduced. Further, since these equipments are unnecessary, the work of laying the communication wire 3 can be easily performed even in a narrow place.

FIG. 3 illustrates a second embodiment of a wire laying method and a wire laying apparatus according to the present invention. This embodiment differs from the embodiment shown in FIG. 1 only in the installation position of the gas flow generator. That is, in the first embodiment, the compressor 1 is connected to the pipe 4 with the cylinder 2 sandwiched therebetween so that the communication wire 3 is pushed out from the cylinder 2. However, in this embodiment, the communication wire 3 is pulled out from the cylinder 2. A gas flow generator is connected to the pipe 4. Therefore, the suction pump 8 is used as the gas flow generator, and the suction pump 8 is connected to the other end of the pipe 4 to which the cylinder 2 is connected. Air in the pipe 4 and the cylinder 2 connected thereto is sucked from the suction pump 8, and an air flow flowing from the cylinder 2 side to the pipe 4 is generated by this suction force. This air flow causes the wire rod 3 for communication to be transferred to the pipe 4 from the wire rod feeding section 5 in the cylinder 2 as in the first embodiment.

In this embodiment as well, after it is confirmed that the communication wire 3 is completely laid inside the pipe 4, the suction pump 8 is stopped to stop the suction, whereby the transfer of the communication wire 3 is stopped.

As described above, the communication wire rod 3 can be easily laid by sucking air by the suction pump 8. In this embodiment, the supply reel 14, the pressure feed head 12, and the control shown in FIG. The equipment such as the device 13 is not required, and the loading, installation, and control of these devices are not required, and the number of personnel required for laying the communication wire rod 3 can be reduced. Further, since these equipments are not necessary, the work of laying the communication wire rod 3 can be easily performed even in a narrow place.

[0024]

As described above, according to the wire laying method and the wire laying apparatus of the present invention, the communication wire can be easily laid without using the supply reel, the pressure feed head, and the controller. There is an effect.

[Brief description of drawings]

1A is a configuration diagram showing a wire laying method and a laying device of a first embodiment of the present invention, and FIG. 1B is a sectional view showing an internal configuration of a cylinder in FIG. 1A.

FIG. 2 is a cross-sectional view showing a state before the cylinder of FIG. 1 (b) is connected to a pipe, (a) is a view before inserting a wire rod, and (b) is a view.
FIG. 6A is a diagram showing a state in which the wire rod is inserted into the cylinder together with the central member, and FIG. 6C is a diagram showing a state in which the central member is pulled out from the state of FIG.

FIG. 3 is a configuration diagram showing a wire laying method and a laying apparatus of a second embodiment of the present invention.

FIG. 4 is a cross-sectional view showing an example of the structure of a communication wire rod.

FIG. 5 is an explanatory view showing a conventional method of laying a wire rod.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Cylinder 3 Wire material 4 Piping 5 Wire material sending part 6 Center member 7 Airtight cap 8 Suction pump 9 Optical fiber wire 10 Outer jacket 11 Wheel 12 Pressure feeding head 13 Control device 14 Supply reel 15 Compressed air introduction pipe

Claims (2)

[Claims] 1. A method of laying a wire in a previously laid pipe by inserting the wire from one end opening of the pipe, wherein an airtight chamber is provided on a side where the wire is inserted, and the wire is placed in the airtight chamber. The airtight chamber is connected to the pipe in a state where the end portion of the wire is inserted into the end opening of the pipe in a spiral bundle and the fluid flow is generated in the pipe in this state. Then, the wire rod is laid inside the pipe while unwinding the wire rods that are bundled in a spiral shape. 2. A device for laying a wire rod in a previously laid pipe by inserting the wire rod from one end opening of the pipe, wherein the device is provided on the side where the wire rod is inserted, and the wire rod is spirally provided inside. A wire rod delivery unit that is housed in a bundle; a cylinder that receives the wire rod delivery unit and is hermetically connected to the pipe in a state where the end of the wire rod enters the end opening of the pipe; A gas flow generator for generating a gas flow in the pipe, which is connected to the end opening of the pipe through the cylinder or directly to the other end opening of the pipe, and is bundled in a spiral shape. A wire laying device configured to lay the wire into the pipe while unwinding the wire.