JP2548465B2 - Passing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring device. More specifically, the present invention relates to a conductive thin tube having a total length of 100 m or more, which has many bent bent portions, and a total length of 1
The present invention relates to a wire-passage device capable of easily wire-passing an optical fiber or the like even with a drum winding thin tube of 000 m or more with high efficiency.

[0002]

2. Description of the Related Art In office buildings, factories, communication facilities, and the like, a conductor is often passed through a small-diameter pipeline such as a pipeline. Is being developed. For example, these known routes include:
There are a method using compressed gas and a) a method not using compressed gas. As the former method using compressed gas, there is known a method in which compressed gas is supplied to a pipe to push a lead wire. As an example of the latter, a method is known in which a conductor is forcibly manually pushed in by a polyethylene pipe or the like.

However, in the former method, there is a large restriction on the pipe diameter, and the smaller the diameter of the pipe, the more difficult it becomes to pass the wire. In addition, when the diameter becomes large, there is a problem in safety due to the increase in pressure of the compressed gas. Moreover,
In a long-distance line, a pipe line having many bent portions, or a drum-wrapped pipe line, the contact with the inner wall of the pipe makes it extremely difficult to pass the wire.

On the other hand, in the case of the method which does not use compressed gas, since the conductor wire is pushed in manually, it is difficult in many cases to carry the wire, and even if it is possible to manage the wire in a short distance, the work effort is great. Will be things. In recent years, optical fibers have been increasingly used as conducting wires.However, it is difficult to smoothly pass the fiber without damaging the fiber, and the method using a compressed gas is difficult. Also, it was impossible to pass the optical fiber with the connection terminal attached. For this reason, at the site, there is a drawback in that after the difficult wiring work is completed, it is necessary to perform more difficult end joining of the optical fiber using a microscope. Such work effort is
Even a skilled person had a heavy burden.

In view of the above, the drawbacks of the conventional wire passing method are solved, and even a long-distance conduit having a large number of bent portions and a total extension of 100 m or more, or a total length of 1000 m or more wound on a drum is used. The inventor of the present invention has already proposed a new wiring device that can easily and efficiently perform high-speed wiring even with the thin tube of the above. The apparatus uses the Coanda spiral flow, which has been actively studied by the inventor of the present invention for application to various fields of application, as a principle method for conducting the wire.

That is, the Coanda spiral flow has a large velocity difference and density difference between the axial flow of the fluid and its surroundings and exhibits a steep velocity distribution. For example, the degree of turbulence is 0.2 for turbulent flow. It shows a value of 0.09 or less than half, and is characterized by forming a state different from turbulent flow. Moreover, there is a feature that a unique spiral flow is formed by combining the axial vector and the radial vector.

Therefore, by utilizing the fact that this spiral flow is a flow converging on the pipe axis in the pipe flow, the degree of turbulence is small, and it is possible to suppress the violent contact with the pipe inner wall due to automatic vibration. A method has been developed for efficiently conducting wires without damaging the conductors and the like. FIG. 1 is a schematic diagram showing a method and an apparatus therefor.

For example, as shown in FIG. 1, a Coanda spiral flow unit (3) is connected to a predetermined pipe line (1) for passing a conductor through a flexible hose (2) and the like. Compressed gas is supplied to the Coanda spiral flow unit (3) from the compressed gas supply means (5) through the Coanda slit (4) in the passage direction of the conduit (1). In this state, a predetermined conducting wire (7) is inserted into the suction introduction port (6) of the Coanda spiral flow unit (3).

The conductor (7) is a flexible hose (2).
And it is automatically conveyed by the spiral flow in the pipe line (1), and the line travels at high speed. As the compressed gas supply means (5), a suitable cylinder of air or a compressed gas such as N ₂ or an air compressor can be used. Even when using a cylinder, it is sufficient that the supply pressure of the compressed gas to the Coanda spiral flow unit (3) can be maintained at about 5 to ²⁰ kg / cm ² .

Coanda spiral flow unit (3)
For example, as shown in FIG. 2, for example, an annular Coanda slit (4) is provided between the connection port (8) to the conduit and the suction introduction port (6) for introducing the conducting wire (7), and the vicinity thereof. The structure having the inclined surface (9) and the distribution chamber (10) for compressed gas can be shown as a typical example. By setting the angle of the inclined surface (9) to, for example, about 5 to 70 °, a spiral flow is formed, and a strong negative pressure suction force is generated in the suction introduction port (6). (7) is guided and the line (1) in FIG. 1 is passed through at high speed by the Coanda spiral flow.

The wiring method and the apparatus therefor as described above exhibit extremely excellent effectiveness over the conventional method, and enable high-speed wiring. However, further studies made by the inventors have revealed that further improvements should be made in the case of this wire passing method and apparatus using the Coanda spiral flow. This is because in the above wire passage system, backflow of compressed air cannot be completely avoided at the suction inlet (6), and the conductor (7)
It has become clear that improvement of this point is necessary for more stable and high-speed long-distance wiring because of the vibration and waviness of the.

The present invention has been made in order to solve the above problems, and is capable of more stable and high-speed long-distance wiring, and also for optical fiber wiring. It is an object of the present invention to provide a new wiring device that can be passed at high speed without damage.

[0013]

In order to solve the above problems, the present invention provides a compressed gas for producing a Coanda spiral flow in the direction of a pipeline and an inlet for a conductor or a guide wire. In a wiring device provided with a Coanda spiral flow unit having a supply Coanda slit, a single unit or a plurality of units are continuously provided from an inlet for introducing a conductor wire or a guide wire to the unit connected to each other. Multiple passages with the same diameter as the inlet
There is provided a wire passage device having an annular groove portion.

That is, first, in the present invention, in the apparatus shown in FIG. 2, a Coanda flow supply device for supplying a conductor wire or a guide wire is arranged at the suction introduction port (6) of the Coanda spiral flow unit (3). It is possible to provide a more efficient and stable wire passage by providing such a device and further providing a feeding device, and configuring this unit (3) in multiple stages. Then, FIG. 3 shows an example of a wire-passing apparatus of the present invention. For example, in the illustrated wire-passing device in FIG. 3, introducing compressed air through Coanda slits (12) provided in the suction inlet part toward the outside (11) of the Coanda spiral flow unit the plurality are connected (3) and it is introduced into the feed apparatus (13) unit while feeding an example conductor (7) by (3) in the.

[0015] Note that, in the wire-passing apparatus of this example, the conduit connecting port of one unit (8), constitute a multi-stage unit and connected to a suction inlet of the other units (6)
However, in the present invention, it may be a single unit. The inlet (11) is a pressurized gas such as air.
From the point of view of suppressing the backflow of the diameter of the Coanda spiral flow unit (3) diameter has an inner diameter smaller than the, and lead (7) slightly larger degree of inlets than the diameter of (14) Is preferred. Of course this
It is not limited to.

Moreover, in the present invention, as shown in an enlarged view in FIG. 4, in the suction introduction port portion (11) having a small diameter for introducing the suction of the conducting wire (7), the tip of the introduction port (14) is introduced. To
A plurality of annular grooves (15) are provided in a passage having the same diameter as the continuous inlet (14) . Due to the so-called labyrinth effect , the reverse flow (backflow) of the pressurized gas is more effectively suppressed by the plurality of grooves (15) , and stable passage is possible.
Noh.

A muffler may be attached to the inlet port (14) of the suction inlet port (11) to reduce noise during passage. And regarding the feeding device (13),
The conducting wire (7) can be fed out while tension is applied by the opposing roll that is rotated by the drive of the motor or the like. As shown in FIG. 4, this roll (19) (2
The groove (21) may be provided on one or both of the peripheral end faces of (0). The groove (21) may be made of an elastic material. The use of such a feeder makes it possible to almost completely suppress the vibration and undulation of the conductor (7). It is also possible to equip the feeder (13) with a counter mechanism for the distance traveled by the conducting wire (7) by measuring the number of revolutions of the roll (20).

Further, in the present invention, for example, 50
A split type Coanda spiral flow unit, which can be arranged in the middle of the pipeline, may be provided as a booster in order to pass through the pipeline of a long distance of 0 m or more. With this booster, the spiral flow for the passage is further maintained and stabilized.

Further, in the present invention, a sensor for detecting the movement of the conducting wire or the guiding wire is provided in the conduit near the Coanda spiral flow unit, and the feeding speed of the feeding device (13) is controlled by the signal from this sensor. Is also effective. This is due to the vibration of the conductor (7),
Since the stable passage is hindered by the waviness at the tip, an optical sensor or the like detects vibration or waviness of the conductor (7) in the conduit (1) as shown in FIG. 5 (a), for example. If that is the to reduce the feeding speed of the feeding device (13), modified to a state of FIG. 5 (b).

According to the present invention as described in detail above, a) the backflow in the Coanda spiral flow unit is completely suppressed, b) the vibration of the conductor hardly occurs, and c) the corrugation at the tip of the conductor. There is no such effect, and high-speed and stable wiring is possible.

Hereinafter, the present invention will be described in more detail with reference to examples.

[0022]

EXAMPLE 1 Actually, as shown in FIG. 3, it has an annular groove and 2
A wire passage device including a Coanda spiral flow unit (3) having a stepped unit configuration is used, and a diameter of a connection port (8) with the conduit (1) is set to 8 mm, and a suction introduction port (1
1) The diameter of the inlet port ( 14 ) of 2.3 mm is used, and the plastic tube 1000 mm (500 m; high-density polyethylene tube, 500 m; low-density polyethylene tube) with a diameter of 6 mm wound around the drum is used. )
An optical fiber having a diameter of 1.8 mm was passed through. This optical fiber has a weight of about 2 g / m and is made of quartz fiber.

The inclination angle of the annular slit was 20 °, and compressed air having a pressure of 8 kg / cm ² was introduced through the annular slit. As a result, the wire connection to the 1000 m tube was completed in about 50 minutes. There was no backflow, fiber pulsation, or even fiber optic damage. Similarly, the conventional compressed air introduction method (turbulent transport method) was tried, but in this case, the passage was practically impossible. Example 2 In the same manner as in Example 1, a 500 m tube was passed. As a result, the passage was completed in 10 minutes.

When this was carried out by the conventional compressed air introduction method, it took 30 to 40 minutes in each case. Example 3 In the same manner as in Example 1, feeding an optical fiber at a position of a tube having a length of 500 m or more when passing through a tube having a length of 1200 m at pressures of compressed air of 6 kg / cm ² and 7 kg / cm ^2. The speed was measured. The result as shown in FIG. 6 was obtained.

As is apparent from FIG. 6 , the present invention realizes extremely high speed wiring.

[Brief description of drawings]

FIG. 1 is a configuration diagram illustrating a wiring method proposed by the inventor of the present invention;

FIG. 2 is a cross-sectional view illustrating a Coanda spiral flow unit that can be used in the method of FIG.

FIG. 3 is a cross-sectional view illustrating the device of the present invention.

4 is a partially enlarged cross-sectional view of the device of FIG.

5 (a) and 5 (b) are schematic diagrams showing a motion state of a conductive wire.

FIG. 6 shows, as an embodiment of the present invention, the correlation between the feed rate of an optical fiber and its distance.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Pipe line 2 Flexible pipe 3 Coanda spiral flow unit 4 Coanda slit 5 Compressed gas supply means 6 Suction introduction port 7 Conductive wire 8 Connection port 9 Inclined surface 10 Distributive material 11 Suction introduction port 12 Annular Coanda slit 13 Feed device 14 Inlet port 15 annular groove

Claims (2)

(57) [Claims] 1. A wire provided with a Coanda spiral flow unit having a conduit connection port, an inlet for a conducting wire or a guide wire, and a Coanda slit for supplying compressed gas for generating a Coanda spiral flow in the conduit direction. In the device, an inlet for introducing a conducting wire or a guiding wire from the outside to the single unit or a plurality of connected units.
A plurality of annular groove portions are provided in a passage having the same diameter as that of the introduction port connected to the wire passage device. 2. The wire passing device according to claim 1, wherein a feeder for the conducting wire or the guiding wire is provided outside the inlet.