JP2004320999A - Pulling-in method of wiring and piping material, and end cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pulling-in method of wiring and piping material, such as cables of electric wires and signal lines or the like or a conduit pipe holding these, by which these are easily inserted into a conduit of a relatively larger diameter laid underground, and an end cap used in the method. <P>SOLUTION: A horn-type end cap 10 to protect the wiring and the piping material pulled into a housing 20 is fitted to the end of the tubular housing 20, and the end cap 10 has a groove-like guide 18. A preceding rope 24 is connected to a pulling-in rope to pull into a second wiring and piping material that are pulled in after a first wiring and piping material. The first wiring and piping material are pulled into the housing 20 while holding the pulling-in rope into the guide 18, by which the pulling-in rope and the first wiring and piping material are laid in the housing 20 while avoiding a slide contact of the pulling-in rope with the wiring and the piping material, at an end. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is a method of laying wiring and piping material in a cylindrical container buried between underground buried boxes such as manholes or handholes buried in the ground, and is inserted into the container. A first wiring / piping material and a dropping rope are connected to the leading rope, and the leading rope is pulled while guiding the dropping rope to a guide portion provided at an end of the container, and the first rope is pulled out. The present invention relates to a method for laying a wiring / pipe material, wherein a wiring / pipe material and a dropping rope are drawn into the housing and laid, and a terminal cap usable in the method.

  Conventionally, wiring and piping materials in which cables such as electric wires and signal lines are piped connect hand holes buried at predetermined intervals in the ground as shown in FIGS. A large-diameter pipe is buried as much as possible, and a plurality of the wiring and piping materials are inserted into the pipe.

  There are various methods for drawing a plurality of wiring and piping materials into such a pipe buried underground, and among the methods commonly used, FIGS. It will be described based on the following.

  First, as shown in FIG. 16, a rigid long wire 210 that can be fed into the tube 200 is inserted from one end of the tube and moved to the other end. Next, as shown in FIG. 17 or FIG. 18, after the leading rope 220 is connected to the distal end of the calling line 210, the leading line 220 is laid in the pipe 200 by pulling back the calling line 210. Subsequently, as shown in FIG. 19, after a wiring / pipe member 240 is connected to the leading end of the preceding rope 220, the leading rope 220 is pulled in while being wound up by a towing machine (not shown), and then piped. At this time, after the plurality of wiring / pipe members 240 are piped into the pipe 200, a plurality of other wiring / pipe members are added to the leading rope 220 and then pulled in. A pull-in rope 250 to be laid above the member 240 is connected.

  However, in this conventional method of drawing in wiring and piping materials, as shown in FIG. 20, a wiring and piping material 240 made of rigid synthetic resin is forcibly bent downward from the ground into a narrow hand hole 230. Since the wire / pipe member 240 is further drawn into the pipe 200 while being drawn in, the wiring / piping material 240 is drawn in while sliding above the inner surface of the pipe. Therefore, the pull-in rope 250 to be laid above the plurality of wiring / pipe members 240 is sandwiched between the upper inner surface of the pipe 200 and the wiring / pipe member 240, and is pulled in under a strong pressure. As a result, at the time of retraction, the retraction rope 250 is damaged and cuts in the middle, and the retraction rope 250 to be laid above the wiring / piping material 240 is retracted while its strong pressure is applied. As a result, the wire / tubing material 240 may be entangled with the pull-in rope 250 itself. If such a trouble occurs, it is impossible to arrange other wiring and piping materials to be further drawn in by using such a draw-in rope 250, so that there is a problem that a very serious situation is caused. Was.

  Therefore, in recent years, in order to prevent such a draw-in rope from being damaged and to make it possible to carry out the piping work more efficiently, the entire shape thereof is formed in a trumpet shape, and the buried pipe is formed. End caps have been proposed that are attached to the body edge.

  However, as described above, the pressure applied to the upper inner surface of the pipe body by pulling in a plurality of rigid pipe members is considerably strong, and even if such a conventional terminal cap is used, the above-mentioned problem may occur. Could not solve the problem.

  The problem to be solved by the present invention is to solve the problems and disadvantages of the conventional terminal cap described above. Accordingly, an object of the present invention is to provide, for example, a cable such as an electric wire or a signal line or a wiring / piping material such as a conduit tube for accommodating the same in a relatively large-diameter pipe buried underground. Wiring and piping material that can be easily inserted and that can be laid without damaging the pull-in rope for drawing in other wiring and piping material that will be installed next at the time of drawing in. And to provide a terminal cap that can be used for this method.

  In order to solve the above, the means adopted by each of the present invention will be described with reference numerals used in the embodiment. First, the invention according to claim 1 draws the wiring and piping material into the cylindrical housing, A method of laying wiring and piping material to be laid, wherein a substantially trumpet-shaped terminal cap for protecting a wiring and piping material drawn into the housing is attached to an end of the cylindrical housing, Has a groove-shaped guide portion, a first wiring / piping material, and a second wiring / piping material drawn next to the first wiring / piping material into the leading rope inserted through the terminal cap and drawn into the housing. 2 by connecting a pull-in rope for pulling in the wiring / piping material, pulling the preceding rope, and pulling the first wiring / piping material into the housing while housing the pull-in rope in the guide portion. , At the end Wherein said containing body while avoiding sliding contact with the pull rope and the wiring and piping material, was the gist that that laying the pull rope and the first wiring and piping material Te.

  Next, a second aspect of the present invention is a method for pulling a leading rope, pulling a wiring / piping material and a drop-in rope into a cylindrical housing, and laying the wiring / piping material and the pull-in rope in the cylindrical housing. A terminal cap used in the present invention, which is formed in a substantially trumpet shape and is attached to an end of the housing, and has an inner surface serving as a surface in sliding contact with the wiring / piping material, and the inner surface has the pull-in rope. The gist of the present invention is to provide a groove-shaped guide portion for accommodating therein, so as to avoid sliding contact between the lead-in rope and the wiring / piping material.

  Next, the gist of the invention according to claim 3 is that, in the terminal cap according to claim 2, the cross section is formed in a circular shape.

  Next, the gist of the invention according to claim 4 is that, in the terminal cap according to claim 2 or 3, a split surface is formed in the longitudinal direction.

  According to the wiring / piping material pull-in method according to claim 1 configured as described above, in particular, the pull-in rope connected to the wiring / piping material is connected to the guide portion provided at the end of the container. The lead-in rope can be brought into sliding contact and along it, preferably with tension. That is, even if a strong pressure generated when a plurality of wiring / piping materials are drawn into the container is applied to the inner surface of the container, the pull-in rope is guided by the guide portion and pulled in, so that the pull-in rope is damaged while being pulled. Is prevented from being cut.

  In addition, since the pull-in rope is laid in the housing while being guided by the guide portion, it is possible to prevent the pull-in rope from being entangled with the wiring / piping material or being entangled in the middle.

  Next, according to the terminal cap according to claim 2, which adopts such a configuration, unlike the conventional terminal cap, the terminal cap is attached to the end of the container through which the wiring / piping material is inserted. This makes it possible for the lead-in rope connected to the wiring / piping material to be connected to the guide part of the terminal cap to slidably contact with the guide part, and to guide the lead-in rope along the rope while preferably applying tension. it can. That is, even if a strong pressure is generated when a plurality of wiring and piping materials are drawn into the housing, the pull-in rope is guided by the guide portion and is pulled in, so that the pull-in rope is damaged and cuts in the middle. Is prevented.

  In addition, since the pull-in rope is laid in the housing while being guided by the guide portion, it is possible to prevent the pull-in rope from being entangled with the wiring / piping material or being entangled in the middle.

  If the cross section of the terminal cap is formed in a circular shape, the terminal cap can be removably fitted to the end of the container.

  If a split surface is formed in the longitudinal direction of the terminal cap, even after the leading rope is inserted into the container, the leading cap is passed from the split surface toward the inside of the terminal cap, so that the terminal cap is placed at the end of the container. It can be easily fitted.

  Hereinafter, a method of drawing in wiring and piping material embodying the present invention will be described in more detail with reference to the drawings, but this is only a typical one, and unless it exceeds the gist, the following will be described. The present invention is not limited by the embodiments.

  FIG. 1 is a perspective view of a terminal cap 10 according to a first practical example of the present invention as viewed from above, FIG. 2 is a perspective view of the terminal cap 10 as viewed from below, and FIG. FIG. 3 is a partially enlarged perspective view showing a main part of FIG.

  In the figure, the tube end cap 10 is made of a synthetic resin and has a substantially trumpet-shaped peripheral wall 15 having a large-diameter opening 12 at the upper end and a small-diameter opening 14 at the lower end. The peripheral wall 15 is provided with a split surface 16 in the longitudinal direction. Further, a guide portion 18 extending from the upper edge to the lower edge is provided on the inner surface of the peripheral wall in order to protect the wiring and piping material drawn into the housing. And the guide part 18 is formed with the groove | channel which can accommodate the draw-in rope 26 inside.

  By the way, the external shape of the terminal cap 10 is not limited to a substantially trumpet shape, and may be any shape other than a simple columnar shape, as long as the terminal cap 10 can be removably fitted to the end of the container 20. In particular, a substantially trumpet shape is preferable because the workability for fitting is excellent and the drawing into the housing 20 can be smoothly performed without resistance.

  Hereinafter, taking a case where the terminal cap 10 of the first practical example is used as an example, a method of drawing in wiring and piping material embodying the present invention will be described in detail with reference to FIGS. Note that the wiring / piping material 25 is not shown in FIG. 10 for easy understanding of the drawing.

  As shown in FIG. 4 or FIG. 5, the housing 20 for housing the wiring / piping material 25 is buried in the soil, and both ends thereof are opened by the handhole 30. Wiring and piping materials are inserted into the inside. In the axial direction of the container 20, a leading rope 24 used to draw the wiring / piping material 25 into the container 20 is provided. Note that the leading rope 24 may be a long nominal line having rigidity that can be sent into the container 20 by itself.

  Next, as shown in FIG. 6 or 7, the terminal cap 10 is fitted to the end of the container 20, and the leading rope 24 is arranged inside the terminal cap 10. If necessary, the terminal cap 10 is rotated so that the position where the storage portion 22 is to be pulled in and the position of the guide portion 18 are matched. In this case, since the terminal cap 10 is provided with the split surface 16, even after the leading rope is inserted, by passing the leading rope from the split surface 16 toward the inside of the terminal cap 10, the end portion of the container 20 is The terminal cap 10 can be easily fitted into the terminal cap. Further, even if the diameters of the housings 20 are different, the elasticity of the material, for example, synthetic resin can be utilized, so that it can be handled relatively freely.

  Thereafter, as shown in FIG. 8, the leading rope 24 is connected to the wiring / piping material 25 and the lead-in rope 26 via the connecting portion 27. Subsequently, as shown in FIG. 9 or FIG. 10, the lead rope 24 is engaged along the guide portion 18, and the leading rope 24 is pulled into the housing 20 while slidingly contacting in a tensioned state. -The piping material 25 is drawn into the pipe body 20. At this time, as shown in FIG. 11, the pull-in rope 26 is drawn in while being housed in the groove of the guide portion 18 provided above the inner surface of the terminal cap 10. Even if a strong pressure generated when the wire is pulled into the container is applied to the upper inner surface of the container 20, it is possible to prevent the pull-in rope 26 from being damaged and cut off in the middle. Further, since the pull-in rope 26 is laid above the pipe member 25 while being guided by the guide portion 18, it is possible to prevent the pull-in rope 26 from being entangled with the wiring / pipe member 25 or being tangled in the middle. can do.

  In this way, after the wiring / piping material 25 is drawn into the container 20, the connection of the pull-in rope 26 that has come out of the other end of the container 20 is released, and as shown in FIG. 12 or FIG. Without being entangled with the wiring / piping material 25 or the lead-in rope 26 itself is bent. Therefore, if the second wiring / piping material to be piped next is connected to the pull-in rope 26 and pulled into the housing 20, the pipe can be easily piped above the existing first wiring / piping material 25. can do.

  Further, as described above, the pull-in rope 26 may be used as a rope for pulling the leading rope 24 back into the container 10 after laying the first wiring / piping material 25 by pulling the leading rope 24. . That is, in the method of laying the wiring and piping material in such a case, as shown in FIG. 14, after laying the first wiring and piping material 25, the connection of the wiring and piping material 25 is released from the connecting portion 27. I do. Subsequently, as shown in FIG. 15, the leading rope 24 is pulled back so that the leading rope 24 is pulled back into the container 20 again. Then, the second wiring / piping material to be drawn in next is connected to the pulled-back preceding rope 24, and drawn into the container 20 to be piped. Therefore, according to such a laying method, the pull-in rope 26 may have a breaking strength enough to pull back the preceding rope 24. In addition, even if the pull-in rope 26 has only a breaking strength enough to pull back the preceding rope, when it is drawn into the housing 20, it is pulled while being received in the groove of the guide portion 18. Can be prevented from being cut in the middle of being damaged, being entangled with the wiring / piping material 25 in the middle, or being entangled with the pull-in rope 26 itself.

  As described above, the method of laying the wiring and piping material according to the present invention is a method of laying the wiring and piping material 25 in the cylindrical container 20, and the method of laying the leading rope 24 inserted in the container 20. Connecting the first wiring / piping material 25 and the lead-in rope 26, and pulling the leading rope 24 while guiding the lead-in rope 26 to the guide portion 18 provided at the end of the housing 20, This is a drawing method in which the first wiring / piping material 25 and the drawing rope 26 are drawn into the housing 10 and laid. That is, there is a structural feature in that a pull-in rope 26 having one end connected to a wiring / piping material 25 to be pulled in is slidably brought into contact with the guide portion 18 and pulled into the container 20 in a state of being tightened with a pin. As a result, the pull-in rope 26 is drawn in while being housed in the groove of the guide portion 18 provided at the end of the housing 10, so that a strong force generated when the plurality of wiring / piping members 25 are drawn into the housing 10. Even if an excessive pressure is applied to the upper inner surface of the container 10, the pull-in rope 26 can be prevented from being damaged and cut off in the middle. Further, since the pull-in rope 26 is laid above the pipe member 25 while being guided by the guide portion 18, it is possible to prevent the pull-in rope 26 from being entangled with the wiring / pipe member 25 or being tangled in the middle. can do.

  It should be noted that the present invention is not limited to the above-described embodiment, and improvements, modifications, and the like within a range that can achieve the object of the present invention are included in the present invention. For example, even when the wiring / piping material 25 is inserted through a fluid pipe through which hot water, water, gas, and the like pass, it can be easily and sequentially drawn into the pipe by the same method as described above.

  It can be easily understood by those skilled in the art that the same operation and effect as described above can be obtained even if the configuration in which the guide portion 18 is directly formed at the end of the container 20 through which the wiring and piping materials are inserted is obtained. It is.

1 is a perspective view of a terminal cap 10 according to a first practical example of the present invention as viewed from above. FIG. 2 is a perspective view of the terminal cap 10 shown in FIG. 1 as viewed from below. FIG. 3 is a partially enlarged perspective view showing a main part of the terminal cap shown in FIG. FIG. 4 is a perspective view schematically showing an end of the container before the terminal cap shown in FIG. 1 is attached. FIG. 5 is a sectional view of the state shown in FIG. FIG. 6 is a perspective view schematically showing a state in which a terminal cap is attached to a tubular body. FIG. 7 is a sectional view of the state shown in FIG. FIG. 8 is a sectional view showing an embodiment of the laying method according to the present invention. FIG. 9 is a sectional view showing an embodiment of the laying method according to the present invention. FIG. 10 is a perspective view schematically showing a state in which a pull-in rope is engaged with a guide portion provided on a terminal cap. FIG. 11 is a partially enlarged cross-sectional view showing a state where the pull-in rope is pulled into the guide portion provided on the terminal cap in FIG. 9 while being guided. FIG. 12 is a longitudinal sectional view of a main part for explaining a state in which wiring and piping materials have been arranged by the drop-in method of the present invention. FIG. 13 is a vertical cross-sectional view of a main part along line AA in FIG. FIG. 14 is a sectional view showing another embodiment of the laying method according to the present invention. FIG. 15 is a sectional view showing another embodiment of the laying method according to the present invention. FIG. 16 is a cross-sectional view illustrating a conventional method of laying wiring and piping materials. FIG. 17 is a cross-sectional view showing a conventional method of laying wiring and piping materials. FIG. 18 is a cross-sectional view showing a conventional method of laying wiring and piping materials. FIG. 19 is a cross-sectional view illustrating a conventional method of laying wiring and piping materials. FIG. 20 is a partially enlarged sectional view of FIG.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 10 ... Terminal cap 12 ... Large-diameter opening 14 ... Small-diameter opening 15 ... Substantially trumpet-shaped peripheral wall 16 ... Split surface 18 ... Guiding part 20 ... Container 24 ... Preceding rope 25 ... Wiring and piping material 26 ... Retraction rope 30 Hand hole

Claims (4)

A wiring and piping material laying method for drawing and laying wiring and piping material into a cylindrical container,
At the end of the cylindrical container, a substantially trumpet-shaped terminal cap for protecting the wiring and piping material drawn into the container is attached, and the terminal cap has a groove-shaped guide portion,
A first wiring / piping material and a second wiring / piping material to be drawn in next to the first wiring / piping material are drawn into the preceding rope pulled through the terminal cap and drawn into the housing. By connecting the drop rope and pulling the leading rope, by pulling the first wiring and piping material into the housing while housing the pull rope in the guide portion,
Laying a pull-in rope and a first wiring / pipe material in the container while avoiding sliding contact between the drop-in rope and the wiring / pipe material at the end portion. . A terminal cap used when pulling a leading rope, pulling a wiring / piping material and a dropping rope into a tubular housing, and laying a wiring / piping material and a dropping rope in the tubular housing,
A groove-shaped guide portion which is formed in a substantially trumpet shape and is attached to an end portion of the housing, and has an inner surface serving as a surface in sliding contact with the wiring / pipe material, and the inner surface is provided with the lead-in rope. A terminal cap, wherein sliding contact between the drop rope and the wiring / piping material is avoided.   The terminal cap according to claim 2, wherein the cross section is formed in a circular shape.   The terminal cap according to claim 2 or 3, wherein a split surface is formed in a longitudinal direction.

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