JP2000166055A - Longitudinally split electric wire pipe and method for laying/withdrawing cable or electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric wire pipe for easily inserting or stripping the cable of a piping path or the like and a method for laying or withdrawing the cable or an electric wire, using the electric wire pipe in a wiring construction when the cable is inserted into the electric wire pipe for protection. SOLUTION: A pair of semi pipes 11, where at least the inner surface of each section is formed into a semicircular trough shape and the opening ends are matched each other and a tying tool 13 for tightening the outer peripheries in one piece when the two semi pipes 11 are overlapped opposite to each other, enables an electric wire pipeline to be opened and closed easily due to the engagement and disengagement of the tying tool 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a wiring method in which a conduit 20 is used to protect a cable, and to a conduit used therein.

[0002]

2. Description of the Related Art In facilities such as power plants, various cables are routed and laid over long distances. For example, FIG.
Along the wall 51 inside the building, and the anchor bolt 5 on the ceiling 50
A large number of conduits 20 are laid on a shelf 53 at a high place suspended using the cable 2, and a large number of cables are inserted into each of them. The pipe route is formed as shown in FIG. 9 as an example, and the pipe route 40 naturally has a bent portion 41 not only in the horizontal plane but also in the upper and lower planes according to the structure of the building. In the market, the thickness of the conduit 20 is 100 mm
It is maintained in various stages before and after, and there are also stages in wall thickness.
The length of the conduit is a fixed length of 3.66 m. Also, bend pipes (hereinafter referred to as bends) 22 for bent portions as shown in FIG. 11 and various connecting tools 21 are variously provided according to various thicknesses. Each connection structure of the connection tool 21 is a female type, and there is a screw connection and a screw connection which are screwed to each other with a screw. The connection without the screw is performed after the conduit 20 is fitted in the axial direction as shown in FIG. With set screws in the radial direction, FIG.
And the like utilizing the elasticity of the connector 21 shown in FIG.

[0003] First, piping work has priority over such wiring.
The number of the conduits 20 and the length of the last one are determined for each length of the straight section, and the entire piping path 40 is connected using the bend 22 and the connection tool 21, and is fixed to the shelf 53 or the like. When the cable is inserted, first, a hard messenger wire 31b shown in FIG. 8 is fed into the conduit and inserted. Next, a cable through which the ring wire 31a provided at the end is to be inserted is fixed, and a rope 31c is connected to the end, and the cable is pulled, thereby realizing the insertion of the cable. However, in order to insert the cable, the frictional resistance is large especially at the bent portion 41 in FIG.
There is a problem that the cable is damaged if c is pulled. Empirically, the number of bent portions 41 that can be inserted at the same time is limited to three.

To avoid this problem, there is an accessory for the conduit 20 called a box 23 shown in FIG. 12 and used in place of the bend 22 in the bent portion 41. The box 23 has a lid 23b screwed to the main body 23a. To insert a cable into the piping path 40, the lid 23b
, The pipe is opened, and the cable inserted through the bent portion 41 and thereafter is once discharged out of the pipe, and the box 2
Complete the insertion conditions up to 3. That is, the box 23 is always provided at least for each of the fourth bent portions 41, and the insertion state is completed for each section where the box 23 is provided, and the insertion of the pipe path 40 is advanced by repeating this. That is, it becomes necessary to arrange long cables that are once discharged out of the pipeline for each of the innumerable cables and for each of the fourth positions of the bent portion 41. In this case, in order to prevent twisting of the cables, the cables are generally carefully stacked while drawing a figure of “8”.

[0005] In the renovation work, the removal and laying of the cable are performed before and after. But box 23
However, there is a problem in that the cable is easily damaged by insertion and extraction, and the insertion direction is limited to one side. Therefore, it is not suitable for removal, the work is congested, and the cable may remain without stopping. As described above, in the cable laying work using the conduit 20, there is a strong expectation that workability will be improved in the cable insertion / removal work when there are many bent portions 41 and the pipeline is long.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is directed to a case where an electric conduit 20 is used, and particularly when there are many bent portions 41 in a piping path 40 and the total length of the pipeline is long. Another object of the present invention is to provide a conduit suitable for efficient and rational cable laying / extracting and a method W for laying / extracting the cable.

[0007]

According to the first aspect of the present invention, at least an inner surface of a cross section is formed in a semicircular gutter shape, and a pair of openings whose opening edges are aligned with each other. A half tube 11 and a binding device 13 for integrally fastening the outer periphery of the two half tubes 11 when the two half tubes 11 are overlapped with each other in an opposite direction, and the wire conduit can be opened and closed by engaging and disengaging the binding device 13. This is a vertically split type electric conduit characterized by the following. ADVANTAGE OF THE INVENTION According to this invention, the vertically divided | segmented type conduit can be attached openably and freely from the outer periphery of the cable or electric wire laid in the piping path | route. Thereby, insertion and extraction of the cable or electric wire can be easily and quickly performed. That is, the binding device 1
If the cable 3 is removed, an opening for sending or removing a wire can be formed in the conduit, and an opening means for pulling out the cable from any of the front and rear conduits can be provided.

According to a second aspect of the present invention, in the first aspect, there is provided a pair of edge connection members having an H-shaped cross section in which narrow grooves are formed on both sides in the width direction so as to be aligned with the edges of the respective half tubes. In addition, a vertically split type electric conduit in which the pair of half pipes is held in a substantially circular shape via the edge connection body. According to the present invention, assembling and disassembling of the vertically divided conduit is further facilitated,
Can maintain the strength of the assembled state. The invention according to claim 3 is
A vertically divided electric conduit according to claim 1 or 2, wherein the axis of each half pipe is curved. According to the present invention, especially in a laid road curved portion having a large transmission resistance and removal resistance of the cable, the transmission resistance and the like can be eliminated, and the preparation work becomes easy.

According to a fourth aspect of the present invention, one or more vertically split conduits according to any one of the first to third aspects are arranged in the middle of the piping path 40, and a cable or an electric wire is placed in the piping path 40. In the method of insertion, the vertically split type conduit is opened to form an opening, and a cable or an electric wire is inserted between the openings by feeding the cable or electric wire into the conduit in a sequential manner. A method of laying a cable or an electric wire, wherein the outer periphery of the cable or the electric wire is covered with a pair of the half pipes of the vertically split electric conduit. According to this method, the transmission resistance of the cable is reduced, and the transmission operation can be easily and quickly performed. At the same time, the opening in the piping path 40 opened for the reduction can be easily closed by the vertically divided conduit after the transmission.

According to a fifth aspect of the present invention, one or more vertically split conduits according to any one of the first to third aspects are arranged in a piping path, and a cable or an electric wire 99 is inserted through them. And then, in a removal method of pulling out a cable or an electric wire from the piping route, only the vertically split conduit is removed from the middle of the piping route, and one of the pair of half pipes is removed, and A method of removing a cable or an electric wire, wherein an opening is formed, and then the cable or the electric wire is sequentially removed between the openings. ADVANTAGE OF THE INVENTION According to this invention, the existing cable or electric wire can be easily pulled out from a conduit tube with a small pulling force.

According to a sixth aspect of the present invention, in the fourth or fifth aspect, a cable or an electric wire pulled by the traction tool 31 by inserting the traction tool 31 into the piping path 40 having the opening. Is inserted from one end of the piping path to the first opening where the first vertically split conduit is arranged, and the cable or the like is drawn out from the opening by a predetermined length.
Subsequently, a cable or an electric wire is inserted into a piping path from the first opening to the second opening where the second vertically split conduit is arranged, and the cable or the like is passed through the second opening through the second opening in a predetermined manner. This is a method of laying a cable or an electric wire in which a cable or an electric wire is inserted through the entire piping route by repeatedly drawing out the length and sequentially repeating the same. According to this method as well, the transmission resistance of the cable is reduced, and the opening in the piping path 40 opened for the reduction can be easily closed after the transmission.

According to a seventh aspect of the present invention, in the fourth or fifth aspect, at least one of the vertically split conduits is disposed in a piping path 40, and a cable or an electric wire laid in the piping path is provided. In the method of removing the cable, the cable or the like is pulled out from one end of the piping path to the first opening where the first vertically split type conduit is arranged, and then the second cable is drawn from the first opening. A cable or the like that pulls out a cable or the like of a piping route to the second opening where the vertically split type conduit is arranged from the second opening and pulls out a cable or the like of the entire piping route by sequentially repeating the process. This is a method for removing electric wires. According to this method, the cable removal resistance can be reduced, and the cable removal operation can be performed easily and quickly.

According to an eighth aspect of the present invention, in the method according to any one of the fourth to seventh aspects, one or more vertically divided conduits are arranged in the middle of the piping path 40, A method of laying / pulling out a cable or an electric wire, characterized in that a pipe is opened to form an opening, and a bell mouth Y1 for preventing damage to a cable coating is temporarily disposed at a pipe end of the opening. According to this method, it is possible to prevent the covering portion of the cable or the electric wire from being damaged during the operation of inserting or removing the cable or the electric wire. That is, at the pipe end of the opening,
Since the halved bell mouth Y1 is temporarily provided, there is no possibility of damaging the cable when the cable is taken in and out of the conduit at the opening, and a cable laying / removing method can be provided which greatly improves workability.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing one embodiment of a vertically split type electric conduit 1 of the present invention, FIG. 2 is an axial cross-sectional view showing a connector 21 which can be used in the embodiment of FIG. 1, and FIG. Side view showing a connection portion between the type conduit 1 and a commercially available conduit 20;
FIG. 4 is a perspective view of a bend-type vertically split type conduit tube 2 of the present invention,
FIG. 5 is a plan view showing another embodiment of the bend-type vertically split conduit tube 2 of the present invention, FIG. 6 is a front view of FIG. 4, and a sectional view taken along the line AA of FIG. Halved bell mouse Y1
FIG. 8 is a schematic sectional view showing one embodiment of the present invention, FIG. 8 is a schematic view showing a traction tool 31 used for inserting a cable, and FIG.
FIG. 10 is a schematic longitudinal sectional view showing an example of a laying state of pipes in a pipe route 40, FIG. 11 is a plan view showing an example of a commercially available component configuration of the pipe route 40, and FIG.
Is used for the bent portion 41 of the piping path 40 and the box 23
It is a perspective view of a commercially available product called.

The vertically split type electric conduit 1 shown in FIG. 1 has two half pipes 11 capable of forming a cylinder and a groove for fitting the half pipe 11 between the two half pipes 11 arranged between the two half pipes 11. 2 prepared for
And an edge connector 12 of a book. Then, the assembled tubular body can be linearly connected to a commercially available conduit using the fastener 13 for fastening from the outer periphery. Fastener 13
Is one of the commercial products, and there are various convenient options. The connector 21 shown in FIGS. 2 and 3 is a common product name
1A is a threadless structure used to connect butt pipes. The connecting tool 21 is composed of a main body 21a that is expandable and contractible in the radial direction, and a fastening piece 21b that detachably fastens the slit-shaped opening.

Next, a bend type vertically split type conduit tube 2 shown in FIGS. 4 to 6 is an example in which the axis is formed in a quarter circle, and FIG. The conduit tube 1 is formed in a bend type as it is. 5 and 6
Is composed of a main body 22a and an outer wall 22b, and the main body 22a has a connecting portion 2 made of a conduit 20 at both ends.
2c. The connecting portion 22c and the flange 22d are integrated and fixed to the main body 22a by screws 22e.
The inner surface of the pipe is circularly processed, and there is no step that hinders the insertion of the traction tool 31 or the cable.

Next, FIG. 7 is a view for further facilitating the transmission of the electric power, and the structure shown in FIG.
This is the split bell mouse Y1. In this embodiment, they are bound by a band Y1a and attached to the conduit tube 20 with a push screw. The bell mouth Y1 is configured to cover the end of the conduit tube 20 and to smoothly increase the diameter.

Next, the operation of the cable laying and removing method W will be described with reference to FIGS. First, the reason why an opening is required for transmission in a large part of the transmission resistance and the shape of the opening will be described. When the cable is inserted, pulling the cable in the pipeline involves frictional resistance, and the value is particularly large in the bent portion 41. In particular, when the number of bent portions 41 is large in the pipe path 40, it becomes difficult to insert the pipes visually. In order to solve this difficult problem and to improve the work efficiency, it is essential that the cable in the conduit 20 be directly and positively acted on, and that an opening that can be completely opened and closed be provided in the piping route.

Here, a transmission line function for removal will be described. The insertion resistance of the piping path 40 increases as the number of cables increases. This applies not only to cables that are sequentially added, but also to cables that have been inserted. In addition, there is a difference between the cables depending on the situation of mutual entanglement of the cables in the pipe. It can be easily imagined that the bent portions 41 shown in FIG. 9 increase the tightness of each other by the pulling force of the cable laying rope 31c. A thin messenger wire 31b passes between the cables in front of the bent portion 41, and the cable guided by the thin messenger wire interrupts the tight state. The cables are superimposed one after another while causing the same entanglement thereon. Withdrawal does not inherently select the direction of the transmission line. However, in reality, it is often easier to pull out in the direction opposite to the insertion. The above situation is assumed. If the opening is difficult to transmit in the opposite direction, it may happen that something comes off.

[0020]

The operation of the vertically split conduit 1 as a complete opening means in the piping path will now be described. The vertically split type electric conduit 1 arranged in the piping path has a linear opening formed by attachment / detachment or partial opening / closing. The opening draws the cable from the upstream side in the transmission direction to the first opening, creates a `` slack '' of the cable in that part, and further pulls the slack from the downstream side of the second opening. , The cable can be inserted. In each opening, it is important that the cable is oriented along the axis of the conduit so that the cable does not seize with the open end of the conduit 20 when the cable is drawn or fed. In this case, according to the prototype, the length of the opening is sufficient if the conduit 20 has a fixed length, and depends on the working space and the thickness of the cable. About 1 m is required.

The working environment of the opening for disassembling and assembling the vertically split type conduit tube 1 and supporting the insertion of the cable is generally shown in FIG.
Of the shelf 53 shown in FIG. Therefore, as shown in FIGS. 1 to 3, the vertically divided type electric conduit 1 is simply configured so as to be easily disassembled and assembled. Binding device 13
A commercially available product such as Insulok, a screw type hose band, or various binding bands is used. It is preferable that it has good handleability, has an appropriate binding force, and can withstand long-term use. Further, as a connecting tool 21 for connecting the vertically divided conduit tube 1 and a normal conduit tube, a threadless pipe joint (trade name: Join Thick) 21A shown in FIG. 2 can be used as an example. This is a practical and simple connecting tool 21, which can switch the connection and disconnection simply by detaching the locking body 21b and moving the joint body 21a in the axial direction. The opening provided in the piping route is set by removing the joint and removing the half pipe 11 and the edge connection body 12.

Also, the two edge connection bodies 1 in the assembled state.
It is preferable that the crossing diameter of 2 is extremely slightly larger than the diameter of the adjacent conduit 20. Thereby, when the pipe joint is connected, its elasticity can be exhibited to maintain a good gripping state. Since the conduit 20 is originally fixed to the shelf 53 as shown in FIG. 10, there is no shortage in the stability of the vertically-divided conduit 1.

Next, as another opening means in the piping route,
The operation of the bend type vertically split conduit shown in FIGS. 4 to 6 will be described. The vertically split type conduit 2 shown in FIG. 4 is obtained by bending the vertically split type conduit of FIG. 1 in principle into a quarter circle, and the vertically split type conduit 2 of FIGS. The opening can be set immediately by removing the free outer wall 22b. The transmission route in this case is the same as that of the straight vertical split type conduit tube 1 shown in FIG. The cable is pulled out from the upstream side in the transmission direction to the opening to form a slack, and the slack is pulled from the downstream side, so that the cable is advanced. The difference from the straight vertical split conduit 1 is that, since the outer wall 22b is removed, even if the cable is drawn straight from either the upstream or downstream conduit, the bend type vertical split conduit 2 is used. It does not interfere with itself or other cables. Therefore, it is possible to easily prevent the cable from galling at the open end of the conduit tube 20. In this respect, the workability is excellent.

Next, a description will be given of a cable laying / pulling-out method W1 in a case where the straight vertically split type conduit shown in FIGS. Where and what opening is set in the piping path 40 is an important matter to be considered in advance. Experience has shown that towing equipment 31
The number of bent portions 41 that can be pulled at one time is limited to three places. Therefore, it is sufficient to arrange the vertically split type conduit tube 1 in one place for each of three bent portions. Also, in the case of the bend-type vertically split conduit 2, it may be arranged at one of the three bent portions. The main factor of the insertion limit is the frictional resistance at the bent portion 41,
It is necessary to select a cable that can withstand the stress. In order to form an opening in the piping route, the number of the vertically split conduits to be arranged is determined in consideration of the working environment. Care must also be taken when removal is required. If the number of openings in the piping route is increased after the margin is exceeded, the work efficiency of the wiring work is reduced, and the purpose of insertion / extraction cannot be achieved without the margin. Judgment according to the situation is important.

For example, in the piping route shown in FIG. 9, if insertion is performed from point A, point E becomes the focal point. In the case of a straight, vertically split conduit 1, it is arranged immediately before point E. In addition, a bend-type vertically split conduit 2 can be provided at point E.
However, in this case, if the entire piping route is A to G,
From the balance between the first half and the second half, it is preferable to arrange a straight vertically split conduit immediately before or immediately after the point D, and arrange a bend vertically split conduit at the point D.

The first procedure of the cable transmission work is to insert the messenger wire 31b shown in FIG. One end of the messenger wire 31b is connected to a rope 31c, and the other end is provided with a ring wire 31a. Then, the cable is connected to the next messenger wire 31b via the rope 31c, and the insertion of the cable is started. In this case, only the messenger wire 31b can be passed independently for each cable. However, even if the assisting at the opening is easy, there is a possibility that the entanglement of the cable in the conduit increases.

It is assumed that an opening of the vertically split conduit is provided, for example, near point D in FIG. The cable is inserted from the point A and pulled out to the opening at the point D. And A
~ D is laid. Next, the cable is inserted from point D to point G. As described above, the above operation is repeated for each of the openings where the vertical split type conduit is arranged, and the insertion operation is performed. Then, the insertion can be completed at a stretch under the cooperation of the opening in the pipe route and the pulling portion at the end of the cable. In addition, the opening of the linear vertically-divided conduit 1 or the bend-type vertically-divided conduit 2 is provided at a bent portion 41 where the cables are densely packed or at a position close to the bent portion 41. At the time of insertion, it is possible to adjust the degree of overlap and tension of the cables at the relevant portion with reliability. This is very useful for facilitating subsequent cable insertion and removal at a later date.

Next, a halved bell mouth Y1 shown in FIG. 7 can be provided in the opening where the vertically split type electric conduit is arranged. This can easily prevent the cable from being damaged at the opening edge of the conduit tube. That is, when the cable is pulled out from the pipe route 40 at the opening or is sent out in response to the traction on the downstream side, the cable is connected to the conduit 20.
It is a heavy burden on the work to maintain the orientation of the axis of the robot, and it is also an essential consideration. But if you care, you won't be able to work quickly. If this is neglected, the cable will be scratched and damaged by the end of the conduit 20, and the pulling force at the opening and the tractive force at the tip will also increase. The split bell mouth Y1 eliminates contact between the pipe end of the conduit tube 20 and the cable, and enables smooth insertion and removal from the conduit. Therefore, the work load in pulling out and sending out the cable is remarkably reduced, and the work efficiency can be greatly improved.

[0029]

According to the first aspect of the present invention, the vertically divided conduit can be freely opened and closed from the outer periphery of the cable or the electric wire laid in the piping route. Thereby, insertion and extraction of the cable or electric wire can be easily and quickly performed. That is, if the binding device 13 is removed, an opening for sending or removing the wire can be formed in the conduit, and an opening means for pulling out the cable from any of the front and rear conduits can be provided. Claim 2
According to the invention described in (1), assembling and disassembly of the vertically split conduit is further facilitated, and the strength of the assembled state can be maintained. According to the invention as set forth in claim 3, particularly in a laid road curved portion having a large transmission resistance and removal resistance of the cable,
The transmission resistance and the like can be eliminated, and the preparation work can be facilitated.

According to the fourth aspect of the present invention, the transmission resistance of the cable is reduced, and the transmission operation can be easily and quickly performed. At the same time, the piping route 4 opened for its reduction
The opening in the inside can be easily closed by the vertically split conduit after the transmission. According to the invention described in claim 5, the transmission resistance of the cable is reduced, and the opening in the piping path 40 opened for the reduction can be easily closed after the transmission.

According to the invention described in claim 6, the cable insertion resistance can be reduced and the cable insertion operation can be performed easily and quickly. According to the seventh aspect of the present invention, the cable withdrawal resistance is reduced, and the cable withdrawal operation can be performed easily and quickly. According to the invention described in claim 8, it is possible to prevent the covering portion of the cable or the electric wire from being damaged during the operation of inserting or removing the cable or the electric wire. That is, since the bell mouth is temporarily provided at the pipe end of the opening, there is no fear of damaging the cable when the cable is put in and taken out of the pipe at the opening, and a cable laying / pulling-out method can be provided which has significantly improved workability.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a vertically split type electric conduit 1 according to the present invention.

FIG. 2 is a front view showing a connector 21 used in the embodiment of FIG.

FIG. 3 is a side view showing a connection portion between the vertically divided conduit tube 1 of FIG. 1 and a commercially available conduit tube 20;

FIG. 4 is a perspective view showing one embodiment of a bend type vertically split type conduit tube 2 of the present invention.

FIG. 5 is a plan view showing another embodiment of the bend-type vertically divided conduit tube 2 of the present invention.

6 is a front view of FIG. 5 and an arrow view of an AA cross section.

FIG. 7 is a schematic cross-sectional view showing one embodiment of a split bell mouth Y1 of the present invention.

FIG. 8 is a schematic view showing a traction tool 31 used for inserting a cable.

FIG. 9 is a plan view showing an example of a piping path 40.

FIG. 10 is a schematic vertical sectional view showing an example of a laying state of pipes in a pipe path 40.

FIG. 11 is a partial cross-sectional view showing an example of a commercially available component configuration of the piping path 40.

FIG. 12 is a perspective view of a commercially available product called a box 23, which is used for the bent portion 41 of the piping path 40.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertically divided electric conduit 2 Vertically divided electric conduit Y1 Bell mouth Y1a Band 11 Half tube 12 Edge connection body 13 Bundling device 20 Conduit tube 21 Connection device 21A Connection device 21a Main body 21b Fastening piece 22 Bend (tube) 22a Main body 22b Outer wall 22c Connecting portion 22d Flange 22e Screw 23 Box 23a Main body 23b Lid 31 Traction tool 31a Ring wire 31b Messenger wire 31c Rope 40 Piping route 41 Bent portion 50 Ceiling 51 Wall surface 52 Anchor bolt 53 Shelf 54 Floor 99 Electric wire

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[Procedure amendment]

[Submission date] March 17, 1999 (1999.3.1.
7)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 6

FIG. 5

FIG. 7

FIG. 8

FIG. 9

FIG. 10

FIG. 11

FIG.

Claims (8)

[Claims] 1. A pair of half tubes 1 each having at least an inner surface of a cross section formed in a semicircular gutter shape, and having opening edges aligned with each other.
1 and a tying member 13 for integrally fastening the outer peripheries of the two half tubes 11 when the two half tubes 11 are overlapped with each other in an opposite direction. A vertically divided type electric conduit characterized by the following. 2. A pair of edge connectors 12 each having an H-shaped cross section and having narrow grooves formed on both sides in the width direction, the narrow grooves matching the edges of each of said half tubes 11. A vertically divided electric conduit in which the pair of half tubes 11 is held in a substantially circular shape via a connecting body 12. 3. The vertically divided conduit according to claim 1, wherein each half pipe has a curved axis. 4. A method of disposing one or more vertically split conduits according to any one of claims 1 to 3 in the middle of a piping path 40 and inserting a cable or an electric wire through the piping path 40. Open the split conduit to make openings, insert cables or wires through the conduits between the openings in order, and then vertically extend the outer periphery of the cables or wires at each opening except for both ends of the piping route. A method of laying a cable or an electric wire, wherein the cable or the electric wire is covered with a pair of the half tubes of the split electric conduit. 5. A vertically divided conduit according to any one of claims 1 to 3, wherein one or more vertically divided conduits are arranged in a piping path, and a cable or an electric wire 99 is inserted through them. In a removal method of pulling out a cable or an electric wire from the piping route, only the vertically split conduit is removed from the middle of the piping route, and one of the pair of half pipes is removed to form an opening there, A method of removing a cable or an electric wire, wherein the cable or the electric wire is sequentially removed between the openings. 6. A cable or an electric wire pulled by the traction tool 31 from one end of the piping path according to claim 4 or 5, wherein the traction tool 31 is inserted into the pipe path 40 having the respective openings. The first vertically split type conduit is inserted to the first opening where the conduit is arranged, the cable or the like is drawn out from the opening by a predetermined length, and subsequently, the second vertically split type conduit is inserted from the first opening. A cable or an electric wire is inserted into a piping route to a second opening where a conduit is arranged, and the cable or the like is drawn out from the second opening for a predetermined length, and the process is repeated in sequence, so that the cable or the entire cable is routed. The method of laying the cable or wire that the wire is inserted through. 7. The method according to claim 4, wherein at least one of the vertically divided conduits is disposed in a piping path 40, and a cable or an electric wire laid in the piping path is removed. The cable or the like is pulled out of the opening from one end of the path to the first opening in which the first vertically split type conduit is arranged, and then the second vertically split type conduit is passed through the first opening. A method of removing a cable or an electric wire in which a cable or the like of a piping route to a second opening to be arranged is drawn out from the second opening, and a cable or the like of the entire piping route is pulled out by repeating the sequence. 8. The method according to claim 4, wherein one or more vertically divided conduits are arranged in the middle of the piping path 40. A method of laying and removing a cable or an electric wire, wherein a bell mouth Y1 for preventing damage to a cable coating is temporarily disposed at a pipe end of the opening.