JP2013243893A - Traction tool for in-pipe electrical wiring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traction tool for in-pipe electrical wiring which allows an air pressure acceptor to be easily and inexpensively formed, prevents the air pressure acceptor from bulking when not in use, and causes the air pressure acceptor to easily expand in use, and which causes the air pressure acceptor to smoothly move forward in a pipe.SOLUTION: A guide body 3 is provided in a tip of an air pressure acceptor 2 formed into a circular cone shape, and a filamentous body 4 is connected with the interior of the air pressure acceptor 2.

Description

  The present invention relates to an in-pipe traction tool that is used when a wire such as an electric wire or a cable is passed through a pipe using blower or compressed air from a blower or an air compressor.

  Conventionally, as this type of in-pipe traction tool, for example, as shown in FIG. 14, it is spread at the tip of the tie line 11 by air blow from the mouth end of the pipe or compressed air. It is assumed that the guide parachute member 12 is attached, and the spare string 11 and the support string 13 of the parachute member 12 are rotatably connected via the turn-back means 14 (Patent Document 1).

  As shown in FIG. 15, this conventional in-pipe traction tool inserts the parachute member 12 into a pipe P such as a cable from a manhole or the like, and blows air from the mouth end P1 of the pipe P behind it. Then, compressed air is fed in, the parachute member 12 is expanded by the air pressure, and the spare string 11 is drawn into the pipe P and inserted. Then, a cable or the like to be connected to the spare string 11 is connected, and the spare string 11 is pulled by the next manhole or the like so that the cable is connected.

  And in the said conventional pipe | tube through-line traction tool, even if the parachute member 12 which receives the air pressure of ventilation or compressed air and is blown in the pipe | tube internal space may rotate in a pipe | tube, it is via the turning back means 14. Therefore, the parachute member 12 is not twisted and cannot be opened.

Utility Model Registration No. 3105316

  In this kind of in-pipe traction tool, there are cases where the parachute member 12 does not advance smoothly due to an obstacle such as an electric wire or cable already installed in the pipe, water or earth and sand that has entered the pipe.

  Further, in this type of in-pipe traction tool, even if there is no obstacle as described above, the parachute member 12 is greatly inclined in the pipe and cannot receive the air pressure efficiently, so that the parachute member 12 is smooth. May not advance.

  Further, in this type of in-pipe traction tool, if there is a step or a curved portion of the joint in the pipe, the parachute member 12 may be caught at these points, and the parachute member 12 may not advance smoothly. .

  Furthermore, in this type of in-pipe traction tool, the blowing or compressed air is again fed after the blowing or compressed air has stopped due to a failure of the blower or the air compressor or for some other reason. In such a case, the parachute member 12 may not spread smoothly.

  Therefore, in the conventional in-pipe traction tool, the reinforcing wire 15 which is elastic and has a resilience and is not easily bent is provided along the stitching portion 17 extending from the central top portion of the main body portion 16 toward the periphery. It is configured to be inserted and sewn like an umbrella bone.

  However, as in the case of the above conventional in-pipe traction tool, it takes a lot of labor to insert and sew the reinforcing wire 15 along the stitching portion 17 like an umbrella bone. It was difficult, the price was high, and it was bulky.

  Therefore, the present invention has an object to solve the above-mentioned conventional problems, and an air pressure receiving body such as a parachute member can be configured easily and inexpensively, and the air pressure receiving body does not become bulky when not in use. The purpose of the present invention is to provide an in-pipe traction tool that facilitates the expansion of the air pressure receiver during use and that allows the air pressure receiver to smoothly move through the pipe.

  In the in-pipe traction tool of the present invention, a guide body 3 is provided at the tip of an air pressure receiving body 2 that is a conical cylinder, and a linear body 4 is connected to the inside of the air pressure receiving body 2.

  In the in-pipe traction tool according to the present invention, the conical cylinder is fan-shaped and the flexible sheet 1 is rolled and the ends on both sides are joined.

  In the in-pipe traction tool of the present invention, the sheet 1 is made of a foam.

  In the in-pipe traction tool of the present invention, a small hole 5 is provided at the tip of the air pressure receiving body 2, and a loop body 6 is connected to the guide body 3 having a diameter larger than that of the small hole 5. 6 is passed from the small hole 5 of the air pressure receiving body 2 to the inside, and the tip of the linear body 4 is connected to the loop body 6.

In the tube through wire traction tool of the present invention, the guide body 3 and a spherical body, it is assumed that is smaller than the maximum diameter L ₁ of the diameter L ₂ of the spherical body of the air pressure-receiving member 2 of the tapered tubular.

In the in-pipe traction tool of the present invention, the guide body 3 is a bullet-like body, and the diameter L ₃ of the cylindrical portion of the bullet-like body is smaller than the maximum diameter L ₁ of the conical cylinder of the air pressure receiving body 2. It is assumed that

In the tube through wire traction tool of the present invention, the ratio between the maximum diameter L ₁ of the tapered tubular diameter L ₂ of the spherical body, 1: it is assumed that the 2-3.

In the tube through wire traction tool of the present invention, the ratio between the maximum diameter L ₁ of the tapered tubular diameter L ₃ of the cylindrical portion, 1: it is assumed that the 2-3.

  In the in-pipe traction tool according to the present invention, the outer surface of the air pressure receiving body 2 is an uneven surface.

  In the in-pipe traction tool of the present invention, a large number of cuts 8 are provided at the rear end of the conical cylinder of the air pressure receiver 2.

  In the in-pipe traction tool of the present invention, a number of ridges 9 are provided from the front end to the rear end of the conical tube of the air pressure receiving body 2.

  The in-pipe traction tool according to the present invention is configured as described above, so that the air pressure receiving body can be configured easily and inexpensively, and when not in use, the air pressure receiving body does not become bulky and is used. In some cases, the air pressure receiving body is easy to spread, and even if there are obstacles in the pipe, or there is a step or a curved portion of the joint in the pipe, the air pressure receiving body smoothly moves through the center in the pipe.

It is a perspective view which shows one Embodiment of the pulling tool for in-pipe passage lines of this invention. It is a perspective view which shows other embodiment of the traction tool for in-pipe passage lines of this invention. It is explanatory drawing which shows the process of producing the air pressure receiving body of the pulling tool for in-pipe connection of this invention. It is explanatory drawing which shows the state which connects a linear body to the air pressure receiving body of the pulling tool for in-pipe passage of FIG. It is explanatory drawing which shows the state which connects a linear body to the air pressure receiving body of the pulling tool for in-pipe passages of FIG. It is a perspective view which shows other embodiment of the traction tool for in-pipe connection of this invention. It is a perspective view which shows other embodiment of the traction tool for in-pipe connection of this invention. It is a perspective view which shows other embodiment of the traction tool for in-pipe connection of this invention. It is sectional drawing of the traction tool for in-pipe connection of FIG. It is explanatory drawing which shows the use condition of the pulling tool for in-pipe connection of FIG. It is explanatory drawing which shows the use condition of the pulling tool for in-pipe connection of FIG. It is explanatory drawing which shows the use condition of the pulling tool for in-pipe connection of FIG. It is explanatory drawing which shows the use condition of the pulling tool for in-pipe connection of FIG. It is a perspective view of the conventional pulling tool for in-pipe passage. It is explanatory drawing which shows the use condition of the conventional pulling tool for in-pipe connection.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the pulling tool for in-pipe through lines of this invention is demonstrated in detail based on drawing.

  As shown in FIGS. 1 to 9, the pulling tool for in-pipe passage according to the present invention is provided with a guide body 3 at the tip of an air pressure receiving body 2 that is a conical cylinder, and a linear shape inside the air pressure receiving body 2. It is assumed that the body 4 is connected.

  The conical cylinder may be an integrally molded product of synthetic resin, but it is preferable that the sheet 1 having a fan-shaped flexibility is rolled and joined at both ends.

  The sheet 1 may be made of cloth, paper, synthetic resin material, etc., and is preferably a foam made of polyolefin resin such as polyethylene or polypropylene, and is preferably a continuous foam or a discontinuous foam. And has flexibility, preferably resilience. If the sheet 1 is made of a discontinuous foam, the sheet 1 is excellent in waterproofness, and even if the inside of a pipe through which an electric wire, a cable or the like passes is wet, it can be inserted into the pipe without any trouble.

  In order to join the both ends of the sheet 1, an adhesive may be used, heat welding, or stitching.

  The apex angle α of the conical cylinder of the air pressure receiving body 2 is arbitrary, but it is 25 ° to 60 ° in order to efficiently receive the air pressure from a blower, an air compressor, etc. and advance smoothly in the pipe. What is necessary is just to set it as 27-45 degrees.

  In order to connect the linear body 4 to the inside of the air pressure receiving body 2, a circular small hole 5 is provided at the tip of the air pressure receiving body 2, and as shown in FIG. A linear body 4 is passed inward of the air pressure receiving body 2, and a guide body 3 is provided by circularly tying the tip so as to be larger than the small hole 5, and the linear body 4 is provided outside the air pressure receiving body 2. The guide body 3 is caught in the small hole 5.

  Further, in order to connect the linear body 4 to the inside of the air pressure receiving body 2, a circular small hole 5 is provided at the tip of the air pressure receiving body 2 and has a larger diameter than the small hole 5. A flexible loop body 6 is connected to the guide body 3, and as shown in FIG. 5, the loop body 6 is passed from the small hole 5 of the air pressure receiving body 2 to the inside, and the linear shape is passed through the loop body 6. The front end of the body 4 is connected, and the guide body 3 is provided at the front end of the air pressure receiving body 2. In addition, if the guide body 3 and the loop body 6 are made of a synthetic resin as an integrally molded body, it is easy to manufacture and is durable.

The guide member 3, and a spherical body as shown in FIG. 6, or to those smaller than the largest diameter L ₁ of the diameter L ₂ of the spherical body of the air pressure-receiving member 2 of the conical tubular, 7 As shown in the figure, a bullet-like body is used, and the diameter L ₃ of the cylindrical portion of the bullet-like body is made smaller than the maximum diameter L ₁ of the conical cylinder of the air pressure receiving body 2. The lighter the guide body 3 is, the more smoothly the air pressure receiver 2 advances in the pipe by the air pressure. Further, in order to make the guide body 3 into a spherical body, the guide body 3 can be formed into a spherical shape by bundling fibers such as acrylic and rayon, or a bead ball or a ping-pong ball can be used as a bullet-shaped body. For example, polystyrene foam or sponge molded into a shell shape can be used.

If the guide member 3 has a spherical body, the ratio between the maximum diameter L ₁ of the air pressure-receiving member 2 of the conical tubular diameter L ₂ of the spheres, 1: it is assumed that the 2-3. In this way, even if there is an obstacle in the pipe, or there is a step or a curved part of the seam in the pipe, the guide body 3 hits them, leading the tip of the air pressure receiving body 2 to the center of the pipe. It becomes difficult to get caught in these, and the air pressure receiving body 2 can advance smoothly in the pipe.

When the guide body 3 is a bullet-shaped body, the ratio between the diameter L ₃ of the cylindrical portion of the bullet-shaped body and the maximum diameter L ₁ of the conical cylinder of the air pressure receiving body 2 is 1: 2-3. It is assumed that In this way, as described above, even if there are obstacles in the pipe or there are steps or curved portions of the seam in the pipe, the guide body 3 hits them, and the tip of the air pressure receiving body 2 is touched. Since it is guided to the center of the pipe, it becomes difficult to get caught by these, and the air pressure receiving body 2 can smoothly move in the pipe.

  The linear body 4 is a nominal line for passing an electric wire, a cable, etc. into a pipe, and is a rope, a string, etc., which is lighter than the weight of an electric wire, a cable, etc., and is easy to connect to these. Yes.

  As shown in FIGS. 1 to 3, the pulling tool for in-pipe connection according to the present invention applies metallic luster paint or deposits metal such as aluminum on the outer surface of the conical cylinder of the air pressure receiver 2. In other words, the metallic gloss surface 7 is formed. Further, the outer surface of the air pressure receiving body 2 is an uneven surface of 2 to 10 mm square, and the height difference of the uneven surface is set to 0.2 to 1.0 mm. If it does in this way, when the air pressure receiving body 2 advances in a pipe | tube, the frictional resistance of the air pressure receiving body 2 and the inner wall of a pipe | tube will become small, and the air pressure receiving body 2 can advance the inside of a pipe | tube smoothly.

  As shown in FIGS. 6 and 7, the in-pipe traction tool of the present invention has a large number of notches 8 arranged radially from the tip of the conical tube at the rear end of the conical tube of the air pressure receiving body 2. It is assumed that it was provided. In this way, the flexibility of the rear end portion of the air pressure receiving body 2 is increased, the frictional resistance with the inner wall of the pipe is reduced, and the air pressure receiving body 2 can smoothly travel in the pipe. Also, when the air pressure receiving body 2 is pulled back from the pipe, it is easily deformed, so that it can be pulled back with a relatively small force.

  Furthermore, as shown in FIGS. 8 and 9, the pulling tool for in-pipe connection according to the present invention is provided with a large number of projections and depressions 9 radially from the front end to the rear end of the conical cylinder of the air pressure receiver 2. It is said. The uneven strip 9 has a width of 2 to 10 mm, and the height difference of the uneven strip 9 is set to 0.2 to 2.0 mm. If it does in this way, when the air pressure receiving body 2 advances in a pipe | tube, the frictional resistance of the air pressure receiving body 2 and the inner wall of a pipe | tube will become small, and the air pressure receiving body 2 can advance the inside of a pipe | tube smoothly.

  The in-pipe traction tool of the present invention configured as described above inserts the air pressure receiving body 2 into a pipe P such as an electric wire or a cable, and blows or compresses it from the mouth end of the pipe P behind it. When air is sent in, as shown in FIGS. 10a to 13a, the air pressure receiver 2 is smoothly spread by the pressure of the air. This is because the air pressure receiving body 2 is formed of a foam and has a low specific gravity and flexibility.

  Furthermore, the pipe traction tool according to the present invention does not apply the air pressure when the blower or the compressed air stops being fed due to a failure of the blower or the air compressor or for some other reason. Although the receiver 2 tends to be in a closed state, as shown in FIGS. 10b to 13b, it is in a narrowed state, but is not in a completely closed state. This is because the air pressure receiving body 2 is formed of the foam sheet 1 and thus has flexibility and a certain degree of restoring force.

  Therefore, when air blowing or compressed air feeding is started again, air enters the narrowed air pressure receiving body 2 through the narrowed gap, and the air pressure receiving body 2 is as shown in FIGS. In addition, the air is smoothly spread again by the air pressure.

  In addition, since the pulling tool for in-pipe connection according to the present invention is provided with the guide body 3 at the tip of the air pressure receiving body 2, an obstacle such as water or earth and sand is present in the pipe P, although not shown. Even if there is a seam step or a curved portion in the pipe, the guide body 3 hits the obstacle or step, and the tip of the air pressure receiving body 2 is guided to the center of the pipe P. . Therefore, the air pressure receiving body 2 is less likely to be caught by obstacles, steps, etc., and proceeds smoothly in the pipe P.

  Furthermore, in the pipe through-line traction tool of the present invention, the air pressure receiving body 2 is formed with a metallic glossy surface 7, the air pressure receiving body 2 is provided with a large number of cuts 8 at the rear end portion thereof, In the case where many concavities and convexities 9 are provided from the front end to the rear end of the conical cylinder of the pressure receiving body 2, when traveling in the pipe P, the contact area with the inner wall of the pipe P becomes smaller, or the inner wall of the pipe P The hit is weak and the frictional resistance is small. Therefore, the air pressure receiving body 2 moves smoothly through the pipe P.

  As described above, the in-pipe traction tool according to the present invention can easily configure the air pressure receiving body 2, and the air pressure receiving body 2 can be easily expanded during use, so that blowing of air or compressed air can be performed. Even when it stops, when air blowing or feeding of compressed air is started again, the air pressure receiving body 2 is smoothly spread again, which makes it very easy to use.

  Furthermore, the pulling tool for in-pipe connection according to the present invention can configure the air pressure receiving body 2 easily and inexpensively, and is not bulky when not in use, there are obstacles in the pipe, Even if the curved portion exists, the air pressure receiving body 2 smoothly proceeds in the pipe.

DESCRIPTION OF SYMBOLS 1 Foam sheet 2 Air pressure receiving body 3 Guide body 4 Linear body 5 Small hole 6 Loop body 8 Notch 9 Concavity and convexity L ₁ Maximum diameter L ₂ diameter L ₃ diameter

Claims (11)

  A guide body (3) is provided at the tip of the air pressure receiving body (2) formed as a conical cylinder, and a linear body (4) is connected to the inside of the air pressure receiving body (2). Line towing tool.   The pulling tool for in-pipe passages according to claim 1, wherein the conical tube is formed by fanning a flexible sheet (1) and joining both ends.   The in-pipe traction tool according to claim 1 or 2, wherein the sheet (1) is made of a foam.   A small hole (5) is provided at the tip of the air pressure receiving body (2), and a loop body (6) is connected to a guide body (3) having a diameter larger than that of the small hole (5). 6) is passed from the small hole (5) of the air pressure receiving body (2) to the inside, and the tip of the linear body (4) is connected to the loop body (6). The pulling tool for in-pipe communication lines according to any one of the above. The guide body (3) is a spherical body, and the diameter (L ₂ ) of the spherical body is smaller than the maximum diameter (L ₁ ) of the conical cylinder of the air pressure receiving body (2). The pulling tool for in-pipe passages in any one of 1-4. The guide body (3) is a bullet-shaped body, and the diameter (L ₃ ) of the cylindrical portion of the bullet-shaped body is smaller than the maximum diameter (L ₁ ) of the conical cylinder of the air pressure receiving body (2). The tractor for in-pipe passages according to any one of claims 1 to 4. The in-pipe traction tool according to claim 5, wherein a ratio of a diameter (L ₂ ) of the spherical body and a maximum diameter (L ₁ ) of the conical cylinder is 1: 2 to 3. The in-pipe traction tool according to claim 6, wherein a ratio of a diameter (L ₃ ) of the cylindrical portion to a maximum diameter (L ₁ ) of the conical cylinder is set to 1: 2 to 3.   The in-pipe traction tool according to any one of claims 1 to 8, wherein an outer surface of the air pressure receiving body (2) is an uneven surface.   The in-pipe traction tool according to any one of claims 1 to 9, wherein a plurality of cuts (8) are provided at a rear end portion of the conical cylinder of the air pressure receiving body (2). The in-pipe traction tool according to any one of claims 1 to 10, wherein a plurality of concave and convex strips (9) are provided from the front end to the rear end of the conical tube of the air pressure receiving body (2).

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