JP2002044823A - Cabling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit easily drawing a cable or the like through a CD tube even when the CD tube has a bending with a small radius of curvature. SOLUTION: For example, four injection nozzles 3 are circumferentially evenly spaced on the rear end phase of a container-shaped propelling head 2. A flexible tube 4 is connected to the center of a rear end phase of the propelling head 2 via a fitting 6 and one-touch splicer 5. Amounting ring 9 is fitted to the fixing 6. The tip of leading thread 11 whose base end is connected to a cable 10 or the like is fixed on the mounting ring 9. By supplying high pressure air to the propelling head 2 via the flexible tube 4, the high pressure air is injected backward as a propelling air 7 through respective injection nozzles 3. By this reaction force the propelling head 2 moves ahead in the CD tube so as to pull the leading thread 11 into the CD tube 8. When the leading thread 11 is drawn through the CD tube 8, the tip of the leading thread 11 is pulled so as to draw the cable 10 or the like through the CD tube 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring device used for passing cables through a pipe such as a CD pipe.
More particularly, the present invention relates to a wiring device that performs wiring using a propulsion head having propulsion.

[0002]

2. Description of the Related Art Generally, a CD tube is made of a material such as polyethylene, and is lightweight and has excellent insulation, corrosion resistance and water resistance.
In addition, since it can be bent freely, it has recently been increasingly used as piping for electric work instead of iron pipe.

[0003] The CD tube has a bellows structure, and its inner peripheral surface has a number of ring grooves formed at regular intervals, so that a cable such as a power cable or a communication cable is provided in the CD tube. When the cables are passed through, there is a problem that the leading end of the cables hits a ring groove on the inner surface of the CD tube, which causes a large resistance, and it is extremely difficult to perform a wiring operation.

Therefore, conventionally, a hemispherical cap is attached to the end of a cable, or an insulating tape is wound around the end of the cable to make it spherical, so that the end of the cable does not catch on the ring groove on the inner surface of the CD tube. I have to.

[0005]

In the conventional method, since the ends of the cables are spherical, the CD
If the tube is straight or curved with a large radius of curvature, cables can be passed through the CD tube relatively smoothly, but if the CD tube is curved with a small radius of curvature, However, there is a problem that a large resistance is generated and the line cannot be connected.

[0006] Therefore, in part, a method of first passing a thread consisting of a fine wire or the like through a CD tube, and then pulling the leading end of the thread and passing cables connected to the base end through the CD tube. However, when the yarn is passed through the CD tube, there is a problem that the ring groove on the inner surface of the CD tube hinders the passage of the yarn.

By the way, in the conventional method, when the cables are directly passed through the CD tube, or when the yarn is passed through the CD tube, the cables or the proximal end of the yarn are inserted into the CD tube.
The tip is moved sequentially by the feeding force and the tip side is moved by the sending force. Conversely, if the tip side of the cables or the yarn is pulled to pass through the wire, the CD pipe will bend with a small radius of curvature. Even in such a case, it is expected that the cables or the thread can be passed through the CD tube very easily.

The present invention has been made based on such knowledge, and even if the pipe is curved with a small radius of curvature, it is possible to easily and reliably pass the cables or the thread thereof through the pipe. An object of the present invention is to provide a wiring device.

Another object of the present invention is to provide a wiring device which can more reliably obtain the propulsive force of the propulsion head and is particularly effective when connecting to a CD tube or the like having an uneven portion on its inner surface. It is in.

[0010] Another object of the present invention is to provide a wiring device capable of stabilizing the propulsive force of the propulsion head most.

It is another object of the present invention to provide a wiring device that facilitates recovery of the propulsion head and does not have the drawback that the propulsion head cannot be recovered.

Still another object of the present invention is to provide a wiring device which can easily attach / detach a cable or its thread to / from a propulsion head.

[0013]

In order to achieve the above object, the present invention provides a propulsion head which moves in a pipe by injecting air backward from an injection nozzle; and a propulsion head having a tip connected to the propulsion head. And a flexible tube for supplying high-pressure air to the pipes, and by moving the propulsion head, cables or a thread thereof are passed through the pipe. Then, the propulsion head advances in the pipe due to the rearward injection of the air from the injection nozzle. Therefore, if the propulsion force is used to pull the tip of the cable or its thread, the cable or its thread can be easily passed through the pipe, and the CD or the CD having many ring grooves on the inner peripheral surface. Even if the pipe is a pipe, or if the pipe is curved with a small radius of curvature, the wiring work is easy.

[0014] The present invention also provides air from the injection nozzle.
It is characterized by injecting obliquely to the outer diameter side. Thus, the injected air comes into oblique contact with the inner peripheral surface of the pipe. For this reason, the propulsion force of the propulsion head can be more reliably obtained, and this is particularly effective when a wire is passed through a CD tube or the like having an uneven portion on the inner surface.

The present invention is further characterized in that the injection angle of the air from the injection nozzle is set to 10 to 20 degrees with respect to the center line. Thus, the propulsion force of the propulsion head can be most stabilized.

The present invention is also characterized in that the distal end of the flexible tube is connected to the propulsion head via a one-touch connection tool. Thus, the flexible tube and the propulsion head can be easily separated, and the propulsion head can be easily collected.

[0017] The present invention is further characterized in that an attachment mechanism for attaching cables or its thread to the propulsion head is provided. This makes it possible to easily attach / detach the cables or their yarns to / from the propulsion head, thereby facilitating the wiring operation.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows a wiring device according to an embodiment of the present invention. The wiring device 1 has a propulsion head 2 having an injection nozzle 3 and a flexibility for supplying high-pressure air to the propulsion head 2. And a tube 4.

As shown in FIGS. 1 to 3, the propulsion head 2 is in the form of a cylindrical container having a rounded tip, and its rear end face has, for example, four injection nozzles at regular intervals in the circumferential direction. 3 is provided, and a one-touch connecting member 5 made of, for example, a commercially available air tool joint is attached to a central portion of the rear end face via a mounting bracket 6. The tip is detachably connected.

That is, the distal end of the flexible tube 4
By being inserted into the one-touch connector 5 from the rear end side, it is connected to the one-touch connector 5, and the release member 5 a of the one-touch connector 5 is pressed and slid toward the propulsion head 2. By pulling the flexible tube 4 backward, the flexible tube 4 can be easily removed from the one-touch connection device 5.

The flexible tube 4 has a pressure of 8 to
The high-pressure air of about 10 kg / cm ² is supplied to the propulsion head 2, and the propulsion head 2 jets the supplied high-pressure air backward from the injection nozzle 3 as the propulsion air 7. . The propulsion head 2 can move inside the CD tube 8 by the ejection of the propulsion head air 7.

The propulsion air 7 from each injection nozzle 3 is shown in FIG.
As shown in (2), the fuel is injected obliquely to the outer diameter side, and the injection angle θ is set to 10 to 20 degrees. By setting the injection angle θ in this range, the most stable and large propulsive force can be obtained, and this has been confirmed by experiments by the present inventors.

The reason is that if the injection angle θ is too small,
When a part of the propulsion air 7 comes into contact with the flexible tube 4 or the one-touch connection device 5 or the like, this acts as a force for reducing the reaction force, and a large propulsion force cannot be obtained. Conversely, if the injection angle θ is too large, It is considered that the deviation between the direction of the reaction force and the moving direction of the propulsion head 2 becomes large, and the reaction force cannot be effectively used as the propulsion force. By setting the injection angle θ to 10 to 20 degrees, the propulsion air 7
The entire amount of the propulsion head 2 abuts against the inner surface of the CD tube 8 to obtain a large reaction force, and the deviation between the direction of the reaction force and the moving direction of the propulsion head 2 is small. It may be because it can be used as a driving force.

As shown in FIG. 1, for example, a ring-shaped mounting ring 9 is swingably mounted on the propulsion head 2, specifically the mounting bracket 6, and a cable is mounted on the mounting ring 9. Class 10 or its thread 11 is adapted to be attached.

FIGS. 4 (a) to 4 (c) sequentially show a method of passing the cables 10 through the CD tube 8 using the wiring device 1 according to the procedure. The operation of the embodiment will be described.

When the cables 10 are passed through the CD tube 8, first, as shown in FIG. 4A, the distal end of the flexible tube 4 is connected to the propulsion head 2 and the base of the flexible tube 4 is connected. The end is connected to a high-pressure air source 13 via an on-off valve 12. The distal end of the yarn 11 whose base end is connected to the cables 10 is attached to the mounting ring 9. Then, in this state, the propulsion head 2 is inserted into the entrance end of the CD tube 8.

Next, the on-off valve 12 is opened, and high-pressure air from the high-pressure air source 13 is supplied to the propulsion head 2 via the flexible tube 4. Then, as shown in FIG. 2, the high-pressure air supplied to the propulsion head 2 is jetted backward from each jet nozzle 3 as propulsion air 7, and the propulsion head 2
The reaction force advances the inside of the CD tube 8 toward the exit end. At this time, the flexible tube 4 and the yarn 11 are
Even if nothing is done, C with the advance of the propulsion head 2
When the CD tube 8 is curved with an extremely small radius of curvature, the flexible tube 4 and the yarn 11 are applied to the inner surface of the CD tube 8 by a large force. And the movement of the propulsion head 2 may become unstable.

In such a case, the flexible tube 4 and the yarn 11 are fed into the CD tube 8 little by little as the propulsion head 2 advances. Accordingly, the flexible tube 4 and the yarn 11 do not strongly contact the inner surface of the CD tube 8, and the propulsion head 2 can be moved smoothly.

In this way, the propulsion head 2 is connected to the CD tube 8
When the user moves inside, as shown in FIG.
The outlet end of the tube 8 will be reached. Therefore, when the propulsion head 2 reaches the exit end of the CD tube 8, the propulsion head 2 is pulled out of the CD tube 8, and as shown in FIG. And remove the thread 11 from the mounting ring 9. Then, the flexible tube 4 is pulled toward the inlet end of the CD tube 8 and collected.

By the above operation, only the yarn 11 remains in the CD tube 8. Then, the cable 10 is passed through the CD tube 8 by pulling the end of the warp yarn 11, and when the end of the cable 10 comes out at the exit end of the CD tube 8, the warp yarn 11 is removed from the cable 10.

However, since the cable 10 is routed by using the propulsion head 2 which runs in the CD tube 8, the CD tube 8 may be curved with a small radius of curvature. However, the cables 10 can be easily and reliably passed.

In the above-described embodiment, the case where the cables 10 are routed using the warp yarns 11 has been described, but the cables 10 are directly attached to the mounting ring 9 without using the warp yarns 11. The mounting ring 9 may be omitted, and the cables 10 or the yarn 11 may be directly connected to the mounting bracket 6 or the like. Further, the present invention can be applied not only to the line to the CD tube 8 but also to the line to another pipe.

In the above embodiment, the case where the flexible tube 4 is collected at the inlet end of the CD tube 8 has been described. However, the base end of the flexible tube 4 is cut off from the high-pressure air source 13, You may make it collect | recover at the exit side of CD tube 8. FIG.

[0034]

As described above, according to the present invention, a propulsion head that moves in a pipe by injecting air backward from an injection nozzle; a tip connected to the propulsion head to supply high-pressure air to the propulsion head A cable or a thread thereof is passed through the pipe by the movement of the propulsion head, so that the propulsion head is moved inside the pipe by jetting air backward from the jet nozzle. You will move forward. Therefore, if the propulsion force is used to pull the tip of the cable or its thread, the cable or its thread can be easily passed through the pipe, and the CD pipe having a large number of ring grooves on the inner peripheral surface. However, even if the pipe is curved with a small radius of curvature, cables can be easily and reliably passed through the pipe.

[0035] The present invention also provides air from the injection nozzle,
Since the air is jetted obliquely to the outer diameter side, the jetted air comes into oblique contact with the inner peripheral surface of the pipe. For this reason, the propulsion force of the propulsion head can be obtained more reliably, and this is particularly effective when passing through a CD tube or the like having an uneven portion on the inner surface.

According to the present invention, the jet angle of the air from the jet nozzle is set to 10 to 20 degrees with respect to the center line, so that the thrust of the propulsion head can be most stabilized.

According to the present invention, since the distal end of the flexible tube is connected to the propulsion head via the one-touch connection tool, the flexible tube can be easily separated from the propulsion head, and the propulsion head can be simplified. Can be recovered.

Further, according to the present invention, since the attachment mechanism for attaching the cables or the thread thereof to the propulsion head is provided, the cables or the thread thereof can be easily attached to and detached from the propulsion head, and Work is easy.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a wire connection device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state of propulsion air injected from an injection nozzle of a propulsion head.

FIG. 3 is a right side view of FIG. 2;

4 (a) to 4 (c) are explanatory diagrams sequentially showing a wiring operation using the wiring device of FIG. 1 according to a procedure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Communication apparatus 2 Propulsion head 3 Injection nozzle 4 Flexible tube 5 One-touch connection tool 5a Release member 6 Mounting bracket 7 Propulsion air 8 CD pipe 9 Mounting ring 10 Cables 11 Road thread 12 Opening / closing valve 13 High pressure air source θ Injection angle

Claims (5)

[Claims] 1. A propulsion head that moves in a pipe by injecting air backward from an injection nozzle; and a flexible tube having a tip connected to the propulsion head and supplying high-pressure air to the propulsion head. A cable passing device, wherein a cable or its thread is passed through a pipe by moving the propulsion head. 2. The wiring device according to claim 1, wherein the air from the injection nozzle is injected obliquely to the outer diameter side. 3. The wire connection device according to claim 2, wherein the air injection angle of the air from the injection nozzle is set to 10 to 20 degrees with respect to the center line. 4. The wiring device according to claim 1, wherein the distal end portion of the flexible tube is connected to the propulsion head via a one-touch connection tool. 5. The wiring device according to claim 1, wherein the propulsion head has an attachment mechanism for attaching cables or its thread.