JP2002152939A - Apparatus for inserting cable into pipe through energization by fluid and auxiliary wire for pulling cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for inserting an auxiliary wire that offers proper workability as compared with conventional apparatuses. SOLUTION: The auxiliary wire 10 for pulling a cable has prescribed tensile drag and ease of deformation, and is provided with air resistance function with which the wire is energized in an air flow in the direction of the air flow. A suction apparatus 7 is designed so as to suck the air in a conduit 4 for housing cables from one end of the conduit 4, to produce an air flow in the conduit 4 and energize the auxiliary wire 10 for pulling a cable, inserted into the conduit 4 from the other end of the conduit 4, by the air flow to move the auxiliary wire toward the one end of the conduit 4. Efficiency of operation of inserting cables into a conduit 4 is enhanced by the auxiliary wire 10 for pulling a cable and the sucking apparatus 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a pipe insertion line and a pipe insertion apparatus.

2. Description of the Related Art Cables (conducting cables, coaxial cables, waveguide cables, optical fiber cables) containing one or more conductive lines or communication lines are usually provided on pipes such as pipes and ducts for their protection. Will be accommodated. The pipeline is
For example, it is provided in a long and bent shape under the road, in the pipe shaft of the building, behind the ceiling, etc. In addition, it is often the case that additional cables are inserted after the cables are already inserted. Generally, a plurality of glass fibers are gathered together and a resin-coated thread is inserted through a pipeline in advance as a spare line, and then the end of the cable is connected to one end of the spare line, and the other end of the spare line is pulled. The cable is inserted in the pipeline.

However, the operation of inserting the above-described thread into the pipeline is difficult, requires a long time and requires human labor, and it has been desired to improve the workability. In other words, although this thread requires a large rigidity in its longitudinal direction to overcome the resistance generated in the pipeline at the time of pushing, it is flexible according to the bending of the pipeline and the internal cable layout. Inconsistent characteristics such as the need to bend in an inevitable manner are required, and the stiffness is necessarily limited to ensure the rigidity described above. As a result, the push-in resistance increases and the push-in becomes difficult. Further, it is necessary to avoid that the leading end of the draw thread damages the outer skin of the already laid cable, and it is difficult to push too hard. For this reason, in the push-in operation, the work of slightly pushing in, then pulling a little and pushing in again is often repeated, and it usually took several hours or more to insert a drawn thread of about 300 m. In order to solve this problem, an easily deformable, for example, spindle-shaped, spherical or warhead-shaped head having an outer diameter substantially equal to the inner diameter of the pipeline is attached to the end of the spare line for pulling the wiring, and air is blown into the piping. It is also conceivable to create a pressure difference before and after the head, apply a propulsive force to the head, and insert a spare line into the pipeline. However, when the head is propelled in the pipeline by the pressure difference applied to the head, various problems described below arise.
First, when rust or foreign matter is often generated on the inner peripheral surface of the pipeline, or when a cable is already laid in the pipeline, the head having an outer diameter substantially equal to the inner diameter of the pipeline described above. Then, even if it has flexibility, the frictional resistance with the inner peripheral surface of the pipeline and the existing cable is large, and the propulsion of the head of the spare line and the core wire part following the head of the preliminary selection It was not easy to pull. In particular, since the pipeline often bends at a right angle, it is conceivable that the head may be caught at this bend. Also, even when the head passes through the corner, the subsequent core is strongly rubbed at the corner of the inner peripheral surface of the conduit, so that the core strongly comes into contact with the corner and generates a large drag resistance. In some cases, the core portion may be broken. Next, considering a case where a fluid flow is formed in a pipe, when a fluid is poured from an inlet of a pipe, sealing is difficult because the fluid pressure at the inlet of the pipe becomes more positive than the atmospheric pressure, making it difficult to seal air or water. Is easy to leak from the inlet of the pipeline, and it is difficult to hold the hose connected to the pipeline. In addition, since the entrance of the pipeline is the insertion portion of the spare line, if the hose is brought into close contact with the entrance of the pipeline, there is a problem that the insertion of the spare line is not easy. In addition, the inner diameter of the pipeline in which
There is also a disadvantage that the head must be variously changed in accordance with the variation of the inner diameter of the conduit in order to give a sufficient pressure difference to the head, since the head varies depending on the application. The present invention has been made in view of the above problems, and an object of the present invention is to provide a fluid-energized pipe insertion device and a spare cable pulling cable, which are much superior to conventional devices.

According to the fluid urging type pipe insertion device according to the first aspect of the present invention, since the insertion is performed by using the fluid resistance of the auxiliary line by suction, the following operational effects are obtained.
First, since the fluid (air or water) in the pipeline is sucked, a large bias is generated in order from the tip (head) side of the cable pulling spare line inserted in the pipeline. As a result, the core wire on the entrance side of the pipeline is strongly urged and propelled more strongly than the head, as in the case where fluid is pushed in from the head, so that the core wire becomes a dumpling at the rear of the head and the preliminary wire insertion It will not interfere. In other words, since the spare line is flexible, and its tip end is more strongly sucked than the inlet of the pipeline, the spare line does not accumulate and clog in the middle of the pipeline, so that excellent insertion performance can be realized. it can.
Also, instead of using the pressure difference generated before and after the head, the auxiliary line is inserted by using the fluid resistance when the fluid flow in the pipeline contacts the auxiliary line at high speed, so the auxiliary line head is inserted. It is not necessary to give the outer diameter close to the inner diameter of the pipe to the part. A spare line having a deformable shape can be adopted, and the insertability is improved. Furthermore, the work can be performed cleanly without blowing out the dirt and water in the pipeline into the external space in order to suck them into the suction device, and the work can be performed cleanly. Reduce waste of energy consumption. It should be noted that it is naturally possible to use an air compression device in addition to the suction device under the condition that the inside of the pipeline is maintained at a negative pressure or approximately atmospheric pressure. The suction device may be a centrifugal wing type device such as a blower, and a vacuum cleaner device can sufficiently withstand practical use. As the spare line, a lightweight one such as a nylon string that can be easily deformed in any direction except for a stretched state in a long direction is suitable. According to the fluid-biasing type pipe insertion device according to the second aspect, the core portion has a non-circular cross section (for example, a tape shape, a brush tip shape, a stream-flowing shape, etc.) in a direction perpendicular to the longitudinal direction. Each portion of the core wire portion can have a larger fluid resistance for generating a propulsive force in the suction direction than the core wire portion, and as a result, the following operational effects can be obtained. First, since it is not necessary for the head to pull the entire core wire, there is no need to increase the size of the head to improve head propulsion. It is not hindered. In addition, since a propulsive force is generated in each part of the core part, the tensile drag acting on the core part can be significantly reduced as compared with the case where the core part is pulled by the head. As a result, the cross-sectional area of the core wire portion can be reduced, and the core wire portion can be more easily deformed and lightweight, and can be easily pulled. In addition, even if a bend or the like occurs in the pipeline, the fluid resistance of the core portion of the bent portion becomes larger than that of the straight portion, so that the core portion of the bent portion is favorably propelled in the pipeline direction. Can be. In other words, one of the components of the force due to the air resistance urges the core in the insertion direction, and the other component acts to move the core away from the inner peripheral surface of the pipeline. Can be well propelled in the bend. In addition, since the spare line becomes resistant to the flow of the air flow, the spare line rides on the air flow formed in the pipeline and is urged by the air flow to fly in a direction in which air flows in the pipeline. I do. Since the spare line is easily deformed, even if there are obstacles in the pipeline (existing cables and rust in the pipeline), the air flow is formed so as to avoid these obstacles,
The spare line in the air flow flies while avoiding these obstacles well and selecting the area where air is most likely to flow, that is, the widest wiring space in the pipeline. In addition, even if there is a curved portion in the pipeline, the air flow is also formed to bend in accordance with the curved portion, and the spare line can be easily bent in this curved portion in order, and the spare line is blocked at this curved portion. Nothing. When the core wire is pulled by the head, the core wire extends straight from the head regardless of the flow direction of the airflow, and rubs against the inner peripheral surface of the bend in the middle of the pipe or the existing cable, Generates large resistance. In addition, the portion of the spare line bent at this curved portion has a greater resistance to the air flow than the other portions, so the spare line is more strongly pulled in the air flow direction at this curved portion And the movement of the core wire portion in this curved portion is promoted. The spare wire according to the third aspect has a core portion mainly composed of one or a plurality of tapes joined to each other, so that the following effects can be obtained. Of course, the head may also be tape-shaped. In other words, the tape-shaped pipe insertion line flies due to the high-speed fluid flow in the pipe, generating large frictional resistance and fluid drag (due to vortex generation). And can easily depart from obstacles in the pipeline by flapping, and can fly well not only in a straight pipeline but also in a right-angle pipeline. In particular, when the tape-shaped core portion flies in a right-angled pipeline, the core portion is not strongly pressed against the inner peripheral surface of the pipeline, and an effect that the frictional resistance against the inner peripheral surface of the pipeline is small also occurs. This effect will be described in more detail with reference to FIG. Reference numeral 1000 denotes a tape-shaped core portion which is blown into a high-speed air flow 3000 in a pipe 2000. It is also assumed that a head made of a plurality of tapes is provided at a leading end (not shown) of the core part 1000, and this head pulls the core part 1000. Pipe 2000
When flying in the right-angled pipeline 2001, the tape-shaped core portion 1000 is curved as shown in FIG.
In the maximum bend 1001 of 00, the buoyancy Ff and the drag (propulsion) F in the collision of the high-speed fluid flow 3000 and the hydrodynamics
r results. x is the tape longitudinal direction of the maximum bending portion 1001. As can be seen from FIG.
The force F acting on 001 is the angle 2002 of the right-angled pipe 2001
From the maximum bend 1001. For this reason, even when the maximum bending portion 1001 receives the propulsive force Fh from the head (not shown), the maximum bending portion 1001
1 is not strongly pressed against the corner portion 2002, and the flight of the core wire portion 1000 is smooth. In FIG. 19,
The side surface (thickness direction) of the tape-shaped core portion 1000 is illustrated. FIG. 20 illustrates a case where the core wire portion 1010 made of a thin wire is pulled by a head (not shown). Since the core wire 1010 pulled by the head (not shown) hardly acts on the thin core wire 1010, the maximum bend 1011 is strongly pressed against the corner 2002 of the right-angled pipe 2001, and the large piped A frictional resistance is generated to hinder the insertion of the core 1010, and sometimes the core 10
10 runs out. In addition, the tape-shaped core portion may be configured by a thin wire and a tape fixed to the thin wire. Preferably, a carbon fiber, a nylon fiber, a polyamide fiber, or the like having excellent tensile resistance is used for the fine wire, and an inexpensive thin plastic resin is used for the tape. In this manner, it is possible to realize a core portion which is economically necessary and easily deforms and easily exhibits hydrodynamic performance. of course,
This structure may be adopted for the head. These tape-shaped core portions can be wound around a reel portion such as a fishing rod reel, and can be easily stored and taken out. Since the core portion has a plurality of tapes stacked in the thickness direction and fixed to each other at the center in the width direction, the core wire portion has excellent tensile strength and excellent air resistance with a relatively small width. Can be compatible. In the configuration according to the fifth aspect, the core wire portion is formed by fixing a reinforcing resin thread (for example, a fishing line) to a plurality of tapes that are overlapped in the thickness direction from one to the thickness direction and fixed to each other at the center in the width direction.
It is possible to achieve both excellent tensile strength and excellent air resistance. In addition, it is preferable that the resin thread is provided so as to extend in the longitudinal direction at a central portion in the width direction of the tape. Alternatively, a net-shaped tape may be formed by fixing a net-shaped resin thread to the tape. Since the configuration according to claim 6 has a narrow tape-shaped head formed by cutting the tape from the leading end to a predetermined depth in the longitudinal direction, the head having a large air resistance can be formed by a simple operation. When the head is worn, a certain width is cut off from the leading end of the tape, and the above-mentioned cut is made again to repeatedly generate a new head. That is, the tape tip is easily damaged because the flapping portion is larger than the core wire portion or because the tape tip portion is connected to the cable tip portion after insertion, but the damage is easily recovered substantially. In the spare line shape in other embodiments, the following suitable configuration can be adopted. That is, in this embodiment, a thread portion having a resistance portion having a large fluid resistance is provided as a core wire portion at predetermined intervals in the longitudinal direction. With this configuration, it is possible to generate a propulsive force due to a large fluid resistance in each of the extremely thin core wire portions, so that the same effect as in claim 3 can be obtained. The resistance portion may be in the form of a hair, a flat protrusion, a streamer tape, or the like. Further, in this embodiment, the resistance portion is formed in a sponge shape, a bead shape, or a streamer shape. Accordingly, a large propulsive force can be applied to each part of the core wire (thread) while being easily deformed according to the inner peripheral surface of the pipeline or the existing cable. According to a seventh aspect of the present invention, a large number of thin wire aggregates (tips or flaps) which are thinner than the core portion and which are easily deformed in a direction other than the longitudinal direction than the core portion, or the tip portions are independently connected to each other by the fluid flow. Although the tape has a plurality of tapes, the high-speed fluid flow in the pipeline generates a large fluid drag (due to vortex generation) due to flapping of the tip or the head. Obstacles in the pipeline can be easily bypassed along, so that obstacles in the pipeline (existing cables and pipes) can be easily compared with, for example, a warhead-shaped head having an outer diameter substantially equal to the inner diameter of the pipeline. (Such as rust on the road), the airflow is formed to avoid these obstacles, so the spare line riding on the airflow should avoid these obstacles well, and the area where the air is most likely to flow, The widest wiring space in the road Nde to fly. Also, even if there is a curved portion in the pipeline, the air flow is also bent in accordance with this curved portion,
The spare line does not get clogged at this curved portion. Hereinafter, this will be described in more detail. First, even if there is rust or foreign matter on the inner surface of the pipeline,
The head of this configuration flows while freely flapping in the high-speed fluid, so that there is no large frictional resistance and the insertion is not hindered unlike the pressure difference generating type head. That is, in this configuration, a propulsion force is generated by a fluid resistance force acting on the head by a propulsion force caused by a static pressure difference acting on the head. Therefore, in this configuration, it is not necessary to hold the distal end of the pipe insertion line at a position substantially in contact with the inner peripheral surface of the pipeline in order to secure the above-mentioned static pressure difference, and therefore, it exists on the existing cable or the inner peripheral surface of the pipeline. There is almost no hindrance to the movement of the pipeline by being caught by the foreign matter. The high-speed fluid flow in the pipe, when there is such foreign matter in the pipe, flows so as to bypass these foreign matters, so that the tip of a brush or a tape streamer automatically bypasses these foreign matters. While moving in the pipeline. The force (hereinafter, also referred to as a propulsion force) in the flow path direction generated on the head portion in the form of many thin lines or tapes by the high-speed fluid flow is described below. Part of this impetus is
It is the frictional resistance generated when a high-speed fluid flow contacts this head. Since the surface area of the large number of fine wires and the tape is large, this frictional resistance becomes a value that cannot be ignored. However, the propulsive force acting on the multi-filamentary or tape-shaped head is not limited to this frictional resistance. As is well known, fine lines or tapes in a high velocity air stream oscillate in a wavy manner at right angles to the direction in which the air stream flows. This phenomenon is widely known as the flag fluttering in a strong wind environment. In this flutter, the concave side of the wavy curved portion becomes positive pressure and the convex side becomes negative pressure, and the force that bends the increasingly curved portion (buoyancy in wing theory (force perpendicular to the flow direction of fluid))
Is generated, and a large fluid drag (force parallel to the flow direction of the fluid) is generated at the bent portion. The high-speed fluid flow is bent by a wavy portion of the head of a large number of thin lines or tapes,
Vortices also occur, resulting in high fluid resistance. In this specification, the description of the hydrodynamic analysis of the head of a large number of thin lines or tapes in a high-speed fluid flow is omitted, but for a highly rigid metal plate placed in parallel with the high-speed fluid flow, It will be readily apparent that the flag generates greater fluid drag due to its flutter. In other words, when a high-speed fluid flow is formed in a pipe, and a large number of fine wire-shaped or tape-shaped heads are put therein, the head is pulled downstream by the high-speed fluid flow by pulling the core wire portion, and the pipe insertion line is cut off. It is inserted into a pipe. Next, even when the conduit is bent at a substantially right angle, the multi-thin wire-shaped or tape-shaped head of the present invention generates good propulsive force. This is because even when a large number of fine wire or tape-shaped heads flow through the right-angled part of the pipeline, fluid drag and frictional resistance are applied to all parts of the head, causing the head to bend through the pipeline. It is to promote along. Further, the flapping of the multi-line or tape-shaped head described above is such that even if a part of the head is caught by an obstacle on the inner peripheral surface of the conduit, the head is immediately separated from the obstacle, There is also the advantage that the multi-wire or tape-shaped head does not permanently catch on obstacles in the conduit. In addition, this multi-wire or tape-shaped head allows high-speed fluid flow in the conduit,
This high-speed fluid flow also has the advantage that the core wire itself is propelled by generating frictional resistance and the above-described fluid drag at the core wire of the pipe insertion line. The fact that the propulsion force or the fluttering occurs in the core portion itself prevents the core portion from being caught by an obstacle in the pipeline. Further, the propulsive force acting on the core portion reduces the tensile stress of the core portion, which means that the cross-sectional area of the core portion can be reduced. For example, it means that a very thin material such as a fishing line can be used for the core portion. According to an experiment, when such a tape-like spare line is inserted by air suction, not only in a straight pipe, but also in a bent pipe or a pipe in which a cable is already housed, the pipe is much more conventional (for example, 30 times). As described above, it was found that the spare line can be inserted in a short working time. In the configuration according to claim 8, the suction device and the conduit are connected by a connection hose having a window through which the inside can be viewed. With this configuration, it is possible to easily detect the passage of the pipe by the pipe insertion line, and to prevent it from being missed and prevent the pipe insertion line from being sucked into the suction device. Of course, the entire connecting hose may be formed of a light-transmitting resin, or a part of the connecting hose may be formed with a light-transmitting window. According to a ninth aspect of the present invention, the end of the connecting hose on the pipeline side has a flange portion extending along a flat wall surface having an opening communicating with one end of the pipeline and capable of surrounding the periphery of the opening. The flange is characterized in that it has a detachable elastically deformable portion which is elastically deformably adhered to a flat surface by a negative pressure in the connecting hose. With this configuration, the distal end of the connecting hose is connected to the distal end of the connecting hose by applying a negative pressure to the gap between the surface of the conduit or the structure where the conduit opens and the distal end of the connecting hose. It is urged to be in close contact with the surface of the channel or the structure, and it is possible to reduce air leakage at this portion, thereby suppressing the deceleration of the airflow in the pipeline, and furthermore, by the above-mentioned urging, It is easy to fix the end of the connecting hose to the surface of the pipe or the structure. In addition, since the suction device generates a negative pressure in the vicinity of the flange, the flange is adsorbed to the flat wall surface, so that leakage of fluid is reduced, and the insertion efficiency can be improved. Hereinafter, this will be described in more detail. Instead of the flange, a conical tip of the connecting hose may be inserted into the conduit. However, in this case, if there is an existing cable, the insertion is not easy, and the cross-sectional area of the flow path in the pipe is reduced by the thickness of the connecting hose, so that the formation of the high-speed airflow is hindered. Further, the outer peripheral surface of the conical tip portion must be formed of a soft elastic material, but is easily damaged by a pushing operation into a hard pipe end. Furthermore, when the conduit embedded in the wall is connected to the joint box, it is not easy to push the soft conical cylindrical flange into the conduit in the joint box, and there is an existing cable in the conduit. If it is more difficult. On the other hand, in the present configuration, the flange portion at the distal end of the connection hose has an elastic plate portion that is in close contact with the flat wall surface,
Because the elastic plate is in close contact with the flat wall surface due to the negative pressure created by the suction device, perfect sealing can be performed very easily, and pipes of various diameters can be accommodated without any problems. Even if the joint box is connected, there is no problem because the joint box is sealed. Even if the end of the existing cable already inserted into the pipe has protruded outside from the joint box or the pipe, the flange is pressed against the flat wall from above, and the flexible elastic material of the flange elastically deforms and pops out Since the gap around the existing cable is closed, no problem occurs in the sealing property. Of course, there is no problem even if the existing cable exists in the joint box. In other words, in this configuration, in this pipe insertion device, a pipe or joint box (may be a manhole) opening on a flat wall surface (including a road).
Focusing on the point that the above effect can be obtained if the flange is sucked with the negative pressure of the suction device on this flat wall instead of the pipe line because the tip of the connecting hose is pressed against the flat wall around the It was done. The flange may be formed integrally with the connecting hose, or a flange formed separately from the connecting hose may be used by fitting to the connecting hose.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the following examples.

Embodiment 1 One embodiment of a vacuum suction type pipe insertion device of the present invention will be described below with reference to FIG. Reference numerals 1 and 2 denote manholes provided under the road, and reference numeral 3 denotes a manhole opening with a manhole cover removed. Reference numeral 4 denotes a pipe provided between the manholes 1 and 2 and having a diameter of about 60 mm and a length of about 300 m. The manhole 1 is provided with an opening 5 for the pipe 4.
The manhole 2 is provided with an outlet 6 of a pipe 4. 7
Denotes a suction device, and a distal end 9 of the flexible suction tube 8 is connected to the conduit 4.
In close contact with the wall around the outlet 6. Reference numeral 10 denotes a spare line made of a nylon string, a fishing line, or a polyester tape having a diameter of 5 to 20 mm, and a head portion 10a made of a plurality of tapes or a large number of long resin threads is provided at the tip. The spare line 10 is wound around a drum (not shown). The resin thread or tape used for the head 10a is smaller in diameter and thickness than the thread or tape used for the spare line (core wire), and is easily deformed in other than the longitudinal direction. Now, when the suction device 7 is driven while the head 10a of the spare line 10 is slightly pushed into the insertion port 5 of the conduit 4, the head 10a of the spare line 10 is sucked into the conduit 4 at high speed. According to this, the insertion is completed in just a few minutes. The flexible suction tube 8 is a flexible hose or a bellows tube made of a translucent resin, and the arrival of the spare line 10 can be visually observed.
The distal end 9 of the flexible suction tube 8 has a plate-like shape and is in close contact with the wall of the manhole 2. 2 to 4
7 shows a modification of the spare line 10 and its head 10a.
In FIG. 2, the head 10b of the spare line 10 is formed in a so-called brush shape. If there is an obstacle, the brush-shaped head 10b is easily deformed, and generates a large propulsive force (flow direction) against a high-speed air flow. In FIG. 3, two tapes 10c made of resin or rubber are provided at the end of the spare wire 10. Since the tape 10c is strongly urged by the suction air flow and has high flexibility, the backup line 10 can be smoothly led. In FIG. 4, a hollow string or a tube having a large number of irregularities (projections) on the outer surface is used as a spare line (core part). The irregularities are serrated so as to increase the bias of the suction air flow while preventing the insertion resistance from increasing. Alternatively, irregularities 10d as shown in FIG. 4 may be provided on the surface of a solid string with a rubber film or the like. FIGS. 5 to 7 show modifications of the distal end portion 9 of the flexible suction tube 8. However, 2a is the wall of the manhole 2. In FIG. 5, the flexible tube 8 for suction is used.
The front end 9 of the sealing ring 12 is made of a soft rubber sealing plate 12, a flange plate 13, and a bellows tube 14.
Is adhered to the flange of the flange plate 13, and the bellows tube 14 is fitted to the flange plate 13 and fastened by the ring 15. When the inside of the distal end portion 9 of the suction flexible tube 8 is evacuated, the flange plate 13 presses the sealing ring plate portion 12 and can be brought into close contact with the wall portion 2a of the manhole 2.
Of course, the flange plate 13 can be fixed to the wall of the manhole 2 with bolts or the like. In FIG. 6, the sealing ring plate (soft elastic material) 12a shown in FIG.
Are provided with a large number of coaxial ring-shaped grooves 12b. In this case, the sealing performance is further improved. FIG.
The distal end 9 of the flexible suction tube 8 is composed of a sealing tube 16 made of soft rubber, a bellows tube 17, and a tightening plate 18. The bellows tube 17 is connected to the pipe 4 through the sealing tube 16. It is fitted to the outlet 6 and is fixed by tightening the winding plate 18. Even in this case, it is possible to prevent the inflow of air from the distal end portion 9 of the flexible suction tube 8. Although a case has been described in which a spare wire, that is, a wire for pulling a cable, is inserted into the pipe, it is also possible to directly wire the multi-wire or tape-shaped head attached to the end of the cable.

Embodiment 2 Another embodiment of the vacuum suction type pipe insertion device of the present invention will be described below with reference to FIGS. This embodiment is different from the first embodiment in that the spare line (core part) 10 is formed of a polyester or nylon tape (including cloth tape) having excellent strength. Is different. This tape-shaped spare line 10
Has a width of about 6 mm and a thickness of 80 μm. A plurality of cuts are made at the tip of the tape-shaped spare wire 10 to increase air resistance, and have the same shape as the head 10a as shown in FIG. If the tape-shaped spare wire 10 is made of a cloth tape, the tensile strength and the durability can be improved while easily deformable.
In order to appropriately change the air resistance of the spare wire 10 according to the pipe diameter, three types of tape-shaped spare wires 10 having a width of 6 mm, 9 mm, and 12 mm are wound around different portions of the same reel (not shown). Have been. The reel is rotatably supported by a shaft (not shown), and both ends of the shaft are fixed to a frame (not shown). Thereby, the auxiliary wire 10 having three types of tensile strength without being bulky can be appropriately selected and used. FIG. 1 shows a modification of the second embodiment.
0, shown in FIG. In this embodiment, the tape-shaped auxiliary wire 10 is obtained by superposing two resin tapes 101 and 102 and fusing them at a constant interval in the length direction (for example, 3 mm width every 30 mm. In this case, the air flow in the pipeline enters between the two resin tapes and expands as shown in FIG.
The tape-shaped spare line 10 can generate a large air resistance. Modifications of the second embodiment are shown in FIGS. In this embodiment, the tape-shaped spare line 10 is composed of a line portion 105 made of a thick fishing line and a pair of flexible tape portions 106 and 106 to which the line portion 105 is fixed at the center in the width direction.
Consists of The tape portion 106 is arranged in parallel with the line portion 105 interposed therebetween as shown in FIG. Also, the tape unit 1
As shown in FIG. 12, cuts 107 are formed at predetermined pitches (1 mm in this case) in the length direction at both ends of 06. In this way, since the wire portion 105 bears the necessary tensile strength, the tape portion 106 divided by the large number of cuts 107 can be made thinner, and a large air resistance and flexibility can be obtained while securing the tensile strength. (Easy insertion). When a resin tape is used as the spare line (core portion) or the head 10a, the protrusions referred to in the present invention are provided with irregularities having a height of 10% or more of the thickness of the resin tape by embossing or the like on the surface of the resin tape. It may be. Further, a surface roughening treatment may be performed to increase the frictional resistance of the resin tape. As a result, the frictional resistance of the resin tape is increased, the fluid loss is increased, and the driving force of the resin tape can be increased. FIG. 21 shows a preferred embodiment in which the tape-shaped head 10a and the protrusion 10z are additionally fixed to the linear backup line (core line portion) 10. The four resin tapes 10e to 10h are spirally wound around the end of the spare wire 10 and then bonded or welded. These four resin tapes 10 e to 10 h are separated from the spare line 10 at different positions of the spare line 10. In this way, the head 10a can be easily fixed firmly to the spare line 10. Also, since the entanglement between the resin tapes 10e to 10h is reduced, the resin tapes 10e to 10h are less likely to be damaged by colliding with each other in a high-speed air flow, and are not reduced in deformability and are less likely to be caught by foreign substances. The protruding portion 10z is similarly fixed to the non-tip portion of the spare line 10 and applies a propulsive force to the non-tip portion of the spare line 10. A tape-shaped head 10a and a projection 1 are attached to a tape-shaped spare line (core line portion) 10.
FIG. 22 shows a preferred embodiment for additionally fixing Oz. The head 10a is composed of five resin tapes 10e to 10i,
The root portions of the resin tapes 10e and 10f are adhered to one main surface of the tape-shaped auxiliary wire 10 so that the root portions of the resin tapes 10e and 10f are stacked together. Of the backup wire 10 is bonded to the other main surface. The end of the spare wire 10 is a resin tape 1
0 g forms part of the head 10 a. Similarly, protrusion 1
0z is bonded to the non-tip portion of the spare wire 10. In this way, the head 10a can be easily fixed firmly to the spare line 10. In addition, since the entanglement between the resin tapes 10e to 10i is reduced, the resin tapes 10e to 10i are less liable to be damaged by colliding with each other in a high-speed airflow, and are not reduced in deformability and are less likely to be caught by foreign substances. The protruding portion 10z is similarly fixed to the non-tip portion of the spare line 10 and applies a propulsive force to the non-tip portion of the spare line 10.

Embodiment 3 Another embodiment of the vacuum suction type pipe insertion device of the present invention will be described below with reference to FIG. Reference numeral 200 denotes a concrete wall in which cable pipes 201 and 202 and a joint box 203 connecting them are embedded. Reference numeral 204 denotes a connection hose connected to the suction cylinder of the suction device (not shown).
It is in close contact with the wall surface 206 of the concrete wall 200 surrounding the opening 205 of the joint box 203. 20
7 is an existing cable, and 208 is a soft rubber flange.
The flange 208 is fixed over the entire circumference of the distal end of the connection hose 204. The flange 208 has a lip 209 over the entire circumference, and when the inside of the joint box 203 and the connecting hose 204 becomes negative pressure due to the operation of the suction device, the lip 209 is brought into contact with the concrete wall 20 by atmospheric pressure.
6 to prevent air leakage at this location and connect the connecting hose 204 to the concrete wall 206
Closely contact and hold. According to the present embodiment, the cable piping 2
A spare line can be sucked from the cable pipe 201 or 202 without any problem even if the existing cable 207 exists in the cables 01 and 202. It is preferable that the cable pipe that does not suction the spare line be sealed with a silicon compound or the like. The connecting hose 204 is formed to be transparent, and it is possible to easily detect that the spare line has reached the connecting hose 204. It is preferable that the preliminary selection 204 be colored in a color that is easy to distinguish.

Embodiment 4 Another embodiment of the vacuum suction type pipe insertion device of the present invention will be described below with reference to FIGS. 30
Reference numeral 0 denotes a concrete manhole buried under the road in the ground, to which one ends of cable pipes 301 and 302 are connected. Reference numeral 304 denotes a connecting hose connected to a suction cylinder of a suction device (not shown), and a distal end of the connecting hose 304 is in close contact with a road surface 306 surrounding an opening 305 of the manhole 300. 307 is an existing cable, 3
04a is a flange made of soft rubber. The flange 304a is fixed over the entire circumference of the distal end of the connection hose 304. The collar 304a is moved to the manhole 3 by the operation of the suction device.
When the inside of the connection hose 304 and the connection hose 304 become negative pressure, the connection hose 304 is pressed against the road surface 306 by the atmospheric pressure, thereby suppressing air leakage at this portion, and closely contacting and holding the connection hose 304 with the road surface 306. According to the present embodiment, even if the existing cable 307 exists in the cable pipes 301 and 302, a spare line can be sucked from the cable pipes 301 or 302 without any problem. In this embodiment, since the spare wire is inserted through the cable pipe 301, the cable pipe 30
2 is closed by the communication blocking member 308. The communication blocking member 308 includes a blind plate 309, a tubular portion 310 made of cloth, and a string 31.
1, and a leg 312. The blind plate 309 is shown in FIG.
6, a pair of half-split wheel plates 313, 3 as shown in FIG.
14 is combined with a wheel plate shape. One end of a cloth cylinder 310 is fixed to the inner peripheral edges of the pair of half-split plates 313 and 314. Cloth tube part 310
Are connected to each other to form a magic tape (registered trademark) portion 315. The cloth tubular portion 310 becomes a single piece of cloth by separating the magic tape portion 315. A string 311 for squeezing the end of the cloth cylinder 310 on the anti-blind plate side is provided at the end of the cloth cylinder 310 on the side of the anti-blind plate. Reference numeral 316 denotes a boundary end between the half-split wheel plates 313 and 314. Three leg portions 312 are fixed to the half-split wheel plates 313 and 314, respectively. The leg 312 is shown in FIG.
As shown in FIG. 5, a first rod portion 317 rotatably fixed to the surfaces of the half-split wheel plates 313 and 314, a second rod portion 318 one end of which is in contact with the wall surface of the manhole 300, and a female screw cylinder portion 319. . The first rod portion 317 and the second rod portion 318 are each formed with a male screw that is screwed into the female screw tube portion 319, and the length of the leg portion 312 is adjusted by rotating the female screw tube portion 319. ing. Cloth tube part 310
Has a sponge layer 320 formed particularly around the cord 311 over the entire circumference. The sponge layer 320
In a case where the cloth cylinder 310 is fastened around the plurality of existing cables 307 (only one is shown in the figure) by the string 311, the gap between the existing cable 307 and the cloth cylinder 310 is reduced, and Air leakage from 302 to manhole 300 is reduced. Similarly, a pair of half-split plates 31
A sponge layer or a rubber layer is also formed on the surface or outer peripheral edge of the concrete wall surface of 3,314 to prevent air leakage at this portion. (Modification) In the above embodiment, the flange 304a of the connecting hose 304 was pressed against the road surface 306, but the connecting hose was fixed to the blind plate 309 or the tubular portion 310 of the communication blocking member 308, and the air in the pipe 302 was air-tight. May be sucked, and a spare line may be sucked from an end (not shown) of the pipe 302. In this case, the blind plate 309 which forms the flange in the present invention is used.
Is pressed against the flat wall of the manhole 300,
The legs 312 can be omitted.

Embodiment 5 Another embodiment of the present invention will be described below with reference to FIG. 400 is a dust suction cylinder of a commercially available vacuum cleaner, 401 is a cable pipe through which a spare line is to be inserted, and 402 is a connecting hose connecting these two. The connecting hose 402 is formed of, for example, 2 m in length by a soft transparent resin.
Both ends are formed so as to expand. In order to reduce the pressure loss, it is preferable that a central portion (not shown) of the connecting hose 402 be larger in diameter than both end portions thereof. If a soft resin hose having both ends formed to be divergent is used, even if the diameter of the dust suction cylinder 400 is changed by changing the model of a commercially available vacuum cleaner, it is possible to cope with the problem without any problem. Can be adapted to various changes in the diameter of. Further, since the connecting hose 402 is transparent, the arrival of the spare line can be easily identified. (Modification) FIGS. 21 and 2 show a modification of the spare line of the present invention.
FIG. In FIG. 21, the tape 1
0z protrudes, and tapes 10e, 10f, 10g, and 10h protrude further from the front end of the core wire portion 10 to form a head. In FIG. 22, the tape 10z protrudes from the side surface of the core wire portion 10, and the tapes 10e, 10f, 10g, 10h, and 10i further protrude from the tip portion of the core wire portion 10 to form the head portion 10a. In FIG. 23, the core portion a of the spare line is formed by bonding a spherical sponge ball c to a fishing line b at a constant interval. In FIG. 24, the core portion d of the spare wire
Is formed by adhering a brush tip e having a large number of hairs gathered at regular intervals to a fishing line b. In FIG. 24, the auxiliary line f is formed by stacking three resin tapes g and bonding them to each other at bonding portions h provided at regular intervals, and the head i is formed at the leading end g ′ of the three independent tapes g. Make up. Each tip g 'can flutter freely with each other. In FIG. 25, the auxiliary line j has a structure in which the widthwise central portions of three resin tapes (only the uppermost one is shown) are bonded to each other. k is an adhesion part. By cutting off the end of the spare line j as shown by a broken line, a head made of a total of six small-width tapes can be formed. 27 and 28, the spare line 10 is the head 10a.
And a core 10b following the head 10a. The core 10b is formed of four thin resin tapes 50 as shown in FIG.
1 to 504 and fishing lines 505 and 506. The core portion 10b is formed by laminating resin tapes 501 to 504,
05 and 506 are arranged between the resin tapes 502 and 503, and the heating heads 507 and 508, etc.
504 are fused to each other by a predetermined width. This makes it possible to construct a spare line that is lightweight and has high tensile strength and good flexibility and flapping properties. 50
Reference numeral 9 denotes a horizontal beam portion, and roller-shaped heating heads 507 and 50 are provided.
In FIG. 8, heating portions 509 are extended on both sides in the width direction at regular intervals in the circumferential direction, and resin tapes 501 to 504 are fused in the width direction. Thereby, the transverse beams 509 having a small circumferential width are formed at regular intervals in the longitudinal direction. As a result, it is possible to increase the deformation resistance against the wind while flexibly responding to the pipeline deformation. The head 10a is composed of a total of 12 pieces formed by cutting the fishing line 507, 508 from the tip to a predetermined depth.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing one embodiment of a pipe insertion device of the present invention.

FIG. 2 is a schematic cross-sectional view showing a modified embodiment of a front end of a spare line (a pipe insertion line).

FIG. 3 is a schematic side view showing a modified form of a front end of a spare line.

FIG. 4 is a schematic cross-sectional view showing a modification of a spare line.

FIG. 5 is a cross-sectional view showing a modification of a distal end portion of a flexible suction tube (connection hose).

FIG. 6 is a cross-sectional view showing a modification of a distal end portion of a flexible suction tube (connection hose).

FIG. 7 is a cross-sectional view showing a modification of the distal end of the flexible suction tube (connection hose).

FIG. 8 is a partial plan view of a tape-shaped spare line.

FIG. 9 is a sectional view in the thickness direction of the tape-shaped spare line shown in FIG. 8;

FIG. 10 is a partial side view showing a modified form of the tape-like spare line.

11 is a partial plan view showing a modification of the tape-like spare line shown in FIG.

FIG. 12 is a partial plan view showing a modified form of the tape-like spare line.

13 is a sectional view in the thickness direction showing a modified embodiment of the tape-like spare line shown in FIG.

FIG. 14 is a partial cross-sectional view showing a modification of the end of the connection hose.

FIG. 15 is a partial cross-sectional view showing a modification of the end of the connection hose.

16 is a front view of the communication blocking member shown in FIG.

17 is a side view of the communication blocking member shown in FIG.

FIG. 18 is a partial cross-sectional view showing a modification of the connecting hose.

FIG. 19 is a partial cross-sectional view showing a state where a tape-shaped backup line flies in a right-angled pipeline.

FIG. 20 is a partial cross-sectional view showing a state in which a linear backup line is pulled by the head and moves in a right-angled pipeline.

FIG. 21 is a side view showing an embodiment in which a spare line is linear and a projection and a head are tape-shaped.

FIG. 22 is a side view showing a mode in which a spare line, a protrusion, and a head are formed in a tape shape.

FIG. 23 is a partial plan view showing a modification of the spare line of the present invention.

FIG. 24 is a partial plan view showing a modification of the spare line of the present invention.

FIG. 25 is a partial plan view showing a modification of the spare line of the present invention.

FIG. 26 is a partial plan view showing a modification of the spare line of the present invention.

FIG. 27 is a partial plan view showing a modification of the spare line of the present invention.

FIG. 28 is a front view showing a modification of the spare line in FIG. 27.

[Explanation of symbols]

4 is a conduit, 5 is a conduit insertion port, 6 is a conduit outlet, 7 is a suction device, 10 is a spare line, 10a is a head, 12, 12
b and 16 are elastic seal rings, 310 is a cloth cylinder, 3
13 and 314 are half-split plates

Claims (9)

[Claims] 1. A spare line for pulling a cable having a core portion having a deformability in a direction other than the longitudinal direction, a predetermined tensile drag in a longitudinal direction, and a fluid in the conduit from one end of the conduit for accommodating the cable. The fluid flow is formed in the pipeline by suction, and the propulsive force applied by the fluid to the spare line by the fluid resistance of the spare line for pulling the cable inserted into the pipeline from the other end of the pipeline is generated. And a suction device for moving the spare line to one end side of the pipe line by utilizing the suction line. 2. A spare line for pulling a cable, which is urged by a fluid which is sucked by a suction device and moves in a pipeline and inserted through the pipeline, has a non-circular cross section in a direction perpendicular to the longitudinal direction. A predetermined pulling resistance in the longitudinal direction, easy deformability in other than the longitudinal direction, and a cable pulling reserve having a core portion whose respective parts are propelled in the suction direction as well as the distal end thereof due to resistance to the fluid. line 3. The spare line for pulling a cable according to claim 2, wherein said core portion has a plurality of tapes connected to each other. 4. A spare line for pulling a cable according to claim 3, wherein said core portion has a plurality of tapes stacked in a thickness direction and fixed to each other at a center portion in a width direction. Spare wire for cable pulling. 5. The spare line for pulling a cable according to claim 3, wherein the core wire portion includes a plurality of tapes that are overlapped in one to thickness directions and fixed to each other at a central portion in a width direction.
A spare line for pulling a cable, comprising: a resin thread fixed to the tape. 6. A spare line for pulling a cable according to any one of claims 3 to 5, further comprising a narrow tape-shaped head formed by cutting from a tip end of said tape to a predetermined depth in a longitudinal direction. A spare line for pulling a cable, which is characterized by the following features. 7. A spare line for pulling a cable which is urged by a fluid which is sucked by a suction device and moves in a pipeline and is inserted into the pipeline, and which has a greater fluid resistance than the core portion. Having a head extending from the tip of the core portion, wherein the head is thinner than the core portion and a large number of fine wires that are easier to deform in a direction other than the longitudinal direction than the core portion, or
A cable pulling spare line for cable routing, characterized in that the tip has a plurality of tapes which are independently coupled to each other by the fluid flow. 8. A fluid-energized pipe insertion device using a spare line for pulling a cable according to any one of claims 2 to 7, or a fluid-energized pipe insertion device according to claim 1, wherein the inside is visually recognizable. A fluid-energized piping insertion device, comprising a connecting hose having a pipe portion for connecting the suction device and one end of the pipe line. 9. A fluid-energized pipe insertion device using a cable pulling auxiliary wire according to any one of claims 2 to 8, or a fluid-energized pipe insertion device according to claim 1 or 8, wherein the suction is performed. A connection hose connecting the device and one end of the pipe, wherein a pipe-side end of the connection hose extends along a flat wall surface having an opening communicating with one end of the pipe; A fluid that has a detachable elastically deformable portion that is elastically deformably adhered to the flat surface by negative pressure in the connection hose. Energized piping insertion device.