JPH031883B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a device for passing a cable through a cable conduit.

[Prior art] In order to run a cable conduit installed underground, high-pressure air is blown behind a wire running body that runs inside the cable conduit, and the wire is pulled by this running wire run body. Therefore, conventionally, as shown in Figure 4, the wire W is fed out from a wire feeding machine A placed on the ground.
is guided to the cable conduit entrance in the manhole by a fishing wheel B and introduced into the conduit through an airtight holder C, while high-pressure air from an air compressor D is sent into the conduit from an airtight holder C through an air supply pipe E. However, this high-pressure air caused the wire-carrying body F at the tip of the wire to travel inside the conduit.

[Problems to be Solved by the Invention] In the conventional device as described above, the fishing wheel B that guides the wire during high-speed travel must be carefully installed at an appropriate position, and the fishing wheel B must be carefully positioned while the wire is traveling. The wire could come off the fishing wheel or get tangled at the entrance of the airtight holder C, which hindered the wire's progress. For this reason, conventional wiring devices have the disadvantage that they cannot speed up the wiring work.

Furthermore, a device is known, such as French Patent Publication No. 2383538, in which a wire is passed through an air pipe passing inside a manhole and introduced into a cable conduit. Since the hole diameter cannot be adjusted, there is a drawback that high pressure air leaks, and furthermore, there is a drawback that the airtightness of the end of the air pipe at the cable conduit entrance cannot be maintained.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cable conduit passage device in which the wires do not come off or become entangled during running, unlike conventional cables, and the supply air does not leak.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an air compressor that supplies high-pressure air for propelling a wire running body running in a cable conduit, and a cable conduit. a wire feeder that feeds out a wire to be passed through the passageway; a wire and high-pressure air introducer having a hole diameter adjusting tube for adjusting the diameter of the wire passage hole; and one end connected to the introducer and installed hanging inside the manhole. an airtight guide hose that is connected to the other end of the airtight guide hose to form a wire and high-pressure air supply path; and an airtight holder that is connected to the other end of the airtight guide hose and is attached to a cable conduit opening. A cable conduit passage device is constituted by a wire passage body that is propelled by the high-pressure air and travels within the cable conduit while pulling the tip of the wire.

[Operation] The wire that is passed through the cable conduit is fed out from a wire feeder, and the tip of the wire is connected to a wire passing body that runs within the cable conduit.

The wire running body in the cable conduit is propelled by receiving high-pressure air supplied from an air compressor behind it and travels within the cable conduit. At the same time, the tip of the wire is pulled and threaded into the cable conduit.

The wire, which is continuously fed out from the wire feeding machine as the wire running body runs in the cable conduit, enters the introducer, passes through the airtight guide hose,
It is fed out into the cable conduit through an airtight holder.

High-pressure air supplied from the air compressor also enters the introducer and passes through the airtight guide hose.
It is fed into the cable conduit through an airtight holder.

The diameter of the wire passing hole of the introducer is adjusted by a hole diameter adjustment cylinder, so that when the tip of the wire is introduced, the diameter is increased to facilitate the introduction work, and the wire is fed into the cable conduit. In this case, the diameter is adjusted to be small to prevent high-pressure air from blowing out and leaking from between the wire passage holes.

The airtight guide hose guides the wire fed into the cable conduit by passing it through the hose, thereby allowing the wire to be smoothly guided without requiring a conventional wire guide wheel.

The airtight keeper airtightly closes the cable conduit opening to prevent leakage of high-pressure air fed into the conduit.

[Example] Figure 1 shows one example of the device of the present invention, and the second
The figure shows the wire and the introducer for feeding the high pressure air together, and FIG. 3 shows the airtight holder.

In FIG. 1, 1 is an air compressor placed on the ground, 11 and 12 are its air pipes, and 13 is a pressure regulating valve for high-pressure air. 2 is a wire feeding machine, 21 is its frame, 23 is a traverser, 2
4 is a measuring device for wire feeding length, and W is a wire.

Reference numeral 3 denotes an introducer for introducing the wire from the wire feeder 2 and the high-pressure air sent from the air compressor 1 into an airtight guide hose 5, which will be described later, and its details will be described later with reference to FIG.

The airtight guide hose 5 has one end connected to the above-mentioned above-ground introducer 3 in order to guide the wire and high-pressure air together into the cable conduit, and the other end connected to the cable conduit in the underground manhole. It is connected to an airtight holder 6, which will be described later, installed at the inlet, and the hose 5 is formed into a flexible hose using, for example, a plastic tube with embedded spiral filaments.

Details of the airtight retainer 6 installed in the opening of the cable conduit entrance will be described later with reference to FIG.

8 is a wire passing body that runs in the cable conduit while pulling the wire, and a pressure receiving plate 8 that receives high pressure air.
1 are connected by a flexible connecting part 83, and the rear end part 84 is attached to the wire W, and 85 is the tip part.

9 is a meter for measuring the atmospheric pressure in the pipe L, 10 is a conduction tube that leads the atmospheric pressure in the pipe L to the meter 9, and M is a manhole.

In the introducer 3, as shown in the second figure, a hole diameter adjusting tube 33 for adjusting the diameter of the wire passing hole is screwed into a hollow tube 32 having a through hole 31, and a hole diameter adjusting tube 33 for adjusting the diameter of the wire passing hole is screwed into the hole diameter adjusting tube 33. A wire introduction opening 35 is provided with a tapered hole on the inner surface, and a step edge 36 is formed at the inner depth thereof, and a washer 39 having a tapered hole edge 38 is fitted into the open end 37 of the hollow cylinder 32. A rubber packing 40 is installed between this washer 39 and the inner deep edge 36 of the hole diameter adjusting cylinder 33.

This rubber packing 40 is provided with a wire passing hole 41 and also has a tapered hole edge 38 of the washer 39.
The end surface that comes into contact with is formed into a tapered edge 42, and when the hole diameter adjustment tube 33 screwed into the hollow tube 32 is turned and moved to the left in the figure, the hole diameter adjustment tube 33
The diameter of the wire passage hole 41 in the rubber gasket, which is pressed between the inner deep edge 36 and the washer 39, is reduced,
When the hole diameter adjustment tube 33 is turned in the opposite direction, the pressure of the rubber gasket is loosened and the diameter of the wire passage hole 41 is increased.

Further, the hollow cylinder 32 is provided with a high pressure air introduction hole 43 that communicates with the through hole 31, and the high pressure air introduction hole 43 is connected to the air supply pipe 12 of the air compressor (as shown in the first figure).
Connect. Reference numeral 44 designates a connection port for the airtight guide hose 5 (shown in the first diagram), and reference numeral 45 designates a plate portion for attaching the introducer 3 to the pedestal 21 shown in the first diagram.

In the introducer 3 configured as described above, the wire W coming out of the wire feeder 2 shown in FIG. 1 enters the introducer 3 from the wire introduction opening 35 in the direction of the solid line arrow in FIG. The high-pressure air that passes through the hole 41 and the through hole 31 from the connection port 44 into the airtight guide hose 5 connected thereto, and is supplied from the air supply pipe 12 of the air compressor, flows in the direction of the dotted arrow shown in the second figure. The high pressure air enters the high pressure air introduction hole 43 and is fed into the airtight guide hose 5 from the connection port 44.

The airtight holder 6 is constructed as shown in the third figure. 61 is a hollow pipe, one end of which is provided with a connecting fitting 62 to form a connection to the airtight guide hose 5, and a tightening nut 63 is screwed into a threaded portion provided on the outer periphery of the hollow pipe 61. ,
A fixed disc 64 is provided at the other end of the hollow pipe 61,
A rubber disk 65 is fitted into the hollow pipe 61 in contact with the fixed disk 64. Reference numeral 66 denotes a pressing disk; the tip edge of a pressing tube 67 fitted onto the outer periphery of the hollow pipe 61 is applied to this pressing disk 66, and the rear end edge of the pressing tube 67 is pressed by turning the tightening nut 63. ,
As a result, the pressing disk 66 is pressed toward the fixed disk 64 to sandwich the rubber disk 65 between the pressing disk 66 and the fixed disk 64.

When this rubber disk 65 is compressed as described above, its peripheral edge bulges outward, and when this airtight retainer 6 is installed in the cable conduit, the rubber disk 65 bulges out and comes into pressure contact with the inner wall surface of the cable conduit, thereby fixing the airtight retainer 6 within the cable conduit. 68 is a hollow pipe 61
A rubber ring provided around the outer circumference of a disk fixed to the middle part of the airtight retainer 6 stabilizes the airtight retainer 6 when it is installed inside the cable conduit, and when the nut 63 is turned, the hermetic retainer 6 is secured to the cable conduit. This is to prevent it from spinning inside. Note that a safety valve 69 is attached to the connection fitting 62 as necessary.

Reference numeral 70 denotes a communication pipe provided through the fixed disc 64, rubber disc 65, and pressing disc 66, and the first
The end of the conductive tube 10 connected to the illustrated meter 9 is connected.

Referring again to FIG. 1, as described above, an airtight guide hose 5 is used to connect the introducer 3 connected to the wire feeder 2 placed on the ground and the airtight holder 6 installed at the entrance of the cable conduit in the manhole. , the wire W fed out from the wire feeding machine 2 is introduced into the introducer 3. When introducing the wire, the wire W is introduced by increasing the diameter of the wire passing hole 41 of the rubber gasket 40 provided in the wire introduction opening 35 of the introducer 3 using the hole diameter adjustment tube 33, and then adjusting it to a small diameter. Prevents high pressure air from leaking when the wire is fed into the cable conduit. The wire W introduced into the introducer 3 is passed through an airtight guide hose 5 and pulled out from an airtight holder 6, and a wire passing body 8 is attached to the tip of the wire to constitute the apparatus of the present invention.

In order to install the device of the present invention configured as described above in a cable conduit and carry out wiring work, as shown in the first figure, the airtight guide hose 5 is suspended in the manhole M and connected to the wiring body 8. The airtight holder 6 is inserted into the opening of the cable conduit L, and the tightening nut 63 of the airtight holder 6 is turned to press and fix the rubber disc 65 against the inner wall surface of the cable duct as described above. When turning this tightening nut 63, the rubber ring 68 of the airtight retainer 6 is in frictional contact with the inner wall surface of the cable conduit, so the airtight retainer 6 does not idle, and the cable conduit in which this airtight retainer 6 is installed The open end of L is kept airtight.

The device of the present invention is installed in the cable conduit as described above, and the high-pressure air supplied from the air compressor 1 is passed through the airtight guide hose 5 from the introducer 3, and the cable pipe is passed through the opening at the tip of the airtight holder 6. When the air is ejected toward the conductor 8 in the path L, the conductor 8 receives the pressure of this high-pressure air and is propelled through the cable conduit, pulling the wire W fed out from the wire feeder 2. The wire W is passed through the cable conduit by traveling at high speed inside the cable conduit.

This running wire W is connected to the second wire installed in the introducer 3.
The wire passes through the wire passing hole 41 of the illustrated rubber packing 40, and there is a slight gap between the hole 41 and the wire W.
However, by turning the hole diameter adjustment cylinder 33 to adjust the degree of pressure on the rubber packing 40 and the diameter of the wire passage hole 41, the above-mentioned gap can be adjusted and the leakage of high pressure air can be prevented. Restrict.

When the wire carrying body 8 traveling in the cable conduit while pulling the wire W reaches the other end of the conduit, the operation of the air compressor 1 is stopped, the running of the wire carrying body 8 is stopped, and the wire is fed out. Machine 2 will also be stopped. In this way, the wire W and high-pressure air are passed together from the introducer 3 through the airtight guide hose 5, and the wire W is routed into the cable conduit. Note that the meter 9 and the continuity tube 10 are used to measure the atmospheric pressure in the cable conduit, and the details of each part such as the introducer 3, airtight guide hose 5, airtight holder 6, and wire carrying body 8 described above are shown below. The configuration may be changed as appropriate.

[Effects of the Invention] The present invention is configured as described above, and the wire W and high pressure air are introduced together into the introducer 3, and the wire W inside the airtight guide hose 5 is made to run together with the high pressure air flowing at high speed. Therefore, kinks and entanglements do not occur in the wires as in the conventional case, and therefore the wiring work can be carried out quickly.

In addition, since the wire W and high-pressure air are passed through a single airtight guide hose 5 instead of using separate hoses as in the conventional case, the airtight guide hose 5, airtight holder 6, Wiring body 8
Easy to carry in and install.

In addition, the diameter of the wire passage hole 41 of the rubber gasket 40 of the introducer 3 is adjusted by the diameter adjustment cylinder 33, which facilitates the wire tip introduction work and prevents leakage of high-pressure air while the wire is being fed out. It is possible.

[Brief explanation of drawings]

Figure 1 is a diagram showing one embodiment of the present invention, Figure 2 is a partial sectional view of an introducer, Figure 3 is a partial sectional view of an airtight holder, and Figure 4 is a diagram showing a conventional device. be. 1: Air compressor, 2: Wire feeder, 3: Introducer, 33: Hole diameter adjustment tube, 35: Wire introduction opening, 40: Rubber gasket, 41: Wire passage hole,
5: Airtight guide hose, 6: Airtight retainer, 8: Wiring body.

Claims (1)

[Claims] 1: an air compressor for supplying high-pressure air; a wire feeder for passing through a cable conduit; a wire and high-pressure air introducer having a hole diameter adjustment tube for a wire passage hole; an airtight guide hose that is connected and installed hanging inside the manhole to form a wire and high-pressure air supply path; and an airtight guide hose that is connected to the other end of the airtight guide hose and has a passage hole for the wire and high-pressure air, and is connected to the cable conduit opening. A cable conduit passage device comprising an airtight retainer to be attached and a wire passage body that is propelled by the high-pressure air and travels within the cable conduit while pulling the tip of the wire. .