JP6310272B2 - Cable protection tube construction method, identification cap used therefor, and cable protection conduit - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable protection pipe construction method, an identification cap used for the cable protection pipe, and a cable protection pipe. It is related with the construction method of the cable protection tube used when constructing, the identification cap used for it, and the cable protection pipeline.

  An example of a conventional cable protection tube is disclosed in Patent Document 1.

  In the cable protection tube of Patent Document 1, a plurality of color sheath tubes colored in different colors are accommodated inside the body tube. When connecting the cable protection pipes, the color sheath pipes of the cable protection pipes are color-matched with the same color and connected.

  Furthermore, a cable protection tube in which a plurality of color sheath tubes of different colors and sizes are arranged inside a protection tube (body tube) is also known (for example, Design Registration No. 1353120). In this cable protection tube, the plurality of color sheath tubes are arranged inside the protection tube so that similar colors are not adjacent to each other. And by using each color sheath tube properly, it is possible to prevent a mistaken cable pull-in during construction.

JP 2000-209757 [H02G 9/06]

  However, when connecting the cable protection pipes as described above to form a cable protection pipe line between the hand holes, if any one of the color sheath pipes of each color is insufficient during the construction, the construction work is temporarily stopped there. Because it had to be interrupted, the construction efficiency was poor.

  In addition, when it becomes necessary to construct the remaining 1m section in the vicinity of the handhole on the end point side of the construction section, for example, the color sheath tube of each color is cut and the length of the remaining section is adjusted. Since each color sheath tube had to be manufactured, the cost was increased accordingly.

  Therefore, a main object of the present invention is to provide a novel cable protection pipe construction method, an identification cap used therefor, and a cable protection pipe line.

  Another object of the present invention is to provide a cable protection pipe construction method, an identification cap used therefor, and a cable protection pipe line that can be efficiently constructed at low cost.

  The present invention employs the following configuration in order to solve the above problems. Note that reference numerals in parentheses, supplementary explanations, and the like indicate correspondence relationships with embodiments described later to help understanding of the present invention, and do not limit the present invention in any way.

1st invention is the construction method of the cable protection pipe which forms the cable protection pipe line by making the cable protection pipe which arranged the plural sheath pipe inside the body pipe, (a) different color information Two sets of identification caps of the same color, which are combined into one by attaching one end of the string-like body and connecting the other ends of each string-like body, are provided at both ends of each sheath tube . the step of attaching the two identification cap string-like body of the same color information respectively, is placed in a predetermined position at both ends in the excavation of the cable protection tube equipped with identification cap of each sheath tube (b) step (a) Step (c) Remove the identification cap attached in step (a) from one end of the sheath tube of the cable protection tube installed in the excavation groove in step (b), and remove the sheath of the existing cable protection tube in the excavation groove Identification from one end of the tube Comprising the step of connecting step removing the identification cap corresponding to cap, and (d) is a sheath tube each other to remove the identification cap from the tube end in step (c), a method of constructing the cable protection tube.

In the first invention, the excavation groove (100) is formed in the construction section of the cable protection conduit (10). Then, the necessary number of cable protection pipes (12) are prepared at the construction site, and in step (a), two sets of the same color information string-like bodies are attached to both ends of each sheath pipe (16) of the cable protection pipe. Two identification caps (18, 20, 58) are attached respectively . Then, in step (b), the cable protection tube is carried into the excavation groove, and in step (c), the identification cap is removed from the sheath tube of the existing cable protection tube in the excavation groove, and the newly introduced cable protection tube is introduced. The identification cap with the string-like body of the same color information as the identification cap removed from the sheath tube of the existing cable protection tube is removed from the sheath tube. In step (d), the sheath tubes from which the identification caps have been removed are connected to each other.

According to the first invention, since the connection work is performed while identifying each of the sheath pipes of the cable protection pipes by the string-like bodies of the respective identification caps , the corresponding sheath pipes of the respective cable protection pipes are mutually connected. Can be connected easily and accurately.

  Moreover, since the same pipe | tube can be used for each of the sheath pipes of a cable protection pipe, it can construct efficiently and can also reduce construction cost.

2nd invention is the identification cap used for the construction method of the cable protection tube of 1st invention, Comprising: One end of the string-like body which contains several identification caps of the same color and has different color information in each identification cap Are identification caps that are combined into one by connecting the other ends of each string-like body .

In the second invention, a plurality of identification cap (18,20,58) is shall be fitted to the pipe end of the sheath tube (16), respectively set to the same color, different color information in each of the identification cap While attaching the end of the string-like body which has, the other end of each string-like body was connected, and it integrated into 1 set .

  According to the second invention, the cable protection conduit can be efficiently formed at low cost by performing the connection work between the cable protection tubes using such an identification cap.

  According to the present invention, when connecting the sheath pipes of the cable protection pipe, the connection work is performed by identifying each of the sheath pipes based on the identification information of the identification cap. Thus, a cable protection conduit can be formed.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is an illustration figure which shows simply the cable protection conduit of one Example of this invention. It is an illustration figure which shows typically the cable protective tube with which the identification cap was mounted | worn. It is an illustration figure which shows the cross-section of the axial direction of a cable protection tube. (A) is a top view which shows the body pipe | tube of the cable protection pipe | tube of FIG. 2, (b) is sectional drawing which shows the longitudinal cross-section. (A) is a top view which shows the sheath tube of the cable protection tube of FIG. 2, (b) is sectional drawing which shows the longitudinal cross-section. It is a perspective view which shows the identification cap of FIG. It is sectional drawing which shows a mode that the identification cap of FIG. 6 was mounted | worn with the pipe end of the sheath pipe. It is a perspective view which shows the identification cap of FIG. It is sectional drawing which shows a mode that the identification cap of FIG. 8 was mounted | worn with the pipe end of the sheath pipe. It is an illustration figure which shows a mode that a cable protection pipe | tube is connected to the lotus pipe | tube provided in the handhole by the side of origin. It is an illustration figure which shows a mode that the sheath pipes of the cable protection pipe adjacent to an axial direction are connected. It is sectional drawing which shows a mode that the cable protective tube was continued in the axial direction. It is an illustration figure which shows a mode that a cable protection pipe | tube is connected to the Lotus pipe | tube provided in the hand hole of the end point side. It is a perspective view which shows the modification Example of an identification cap. It is sectional drawing which shows a mode that the identification cap of FIG. 14 was mounted | worn with the pipe end of the sheath pipe. (A) is an illustration figure which shows a mode that the string-like bodies with which the identification cap of FIG. 14 is provided were connected, and the identification cap of eight small diameters was integrated. FIG. 15B is an illustrative view showing a state in which string-like bodies included in the identification cap of FIG. 14 are connected to integrate six large-diameter identification caps. It is a perspective view which shows the modification Example of an identification cap. It is sectional drawing which shows a mode that the identification cap of FIG. 17 was mounted | worn with the pipe end of the sheath pipe. (A) is an illustration figure which shows a mode that the string-like body with which the identification cap of FIG. 17 is provided was connected, and the identification cap of eight small diameters was integrated. FIG. 18B is an illustrative view showing a state in which string-like bodies included in the identification cap of FIG. 17 are connected to integrate six large-diameter identification caps. It is an illustration figure which shows typically the cable protection pipe | tube with which the identification cap of FIG. 14 and FIG. 17 was mounted | worn. It is a perspective view which shows the modification Example of an identification cap. It is a perspective view which shows the modification Example of an identification cap. It is sectional drawing which shows a mode that the modification Example of the identification cap was mounted | worn with the pipe end of the sheath pipe.

  Referring to FIG. 1, a cable protection conduit 10 according to an embodiment of the present invention collectively accommodates cables (not shown) such as communication cables and power cables. And it protects, and it forms by making the cable protection pipe | tube 12 continue to an axial direction with the construction method mentioned later with reference to drawings after FIG.

  As shown in FIGS. 2 and 3, the cable protection tube 12 includes a body tube 14 and a plurality of sheath tubes 16 arranged in alignment within the body tube 14. It is used in a state where identification caps 18 and 20 to which identification information corresponding to each other is attached to both ends of 16 are attached. And the sheath tube 16 corresponding to each other of each cable protection tube 12 is connected while identifying the sheath tube 16 based on the identification information of the identification caps 18 and 20.

  Although the specific structure of the cable protection tube 12 is demonstrated below, the structure of the body pipe | tube 14 and the sheath pipe | tube 16 can be suitably changed within the range which does not deviate from the meaning of invention.

  4 and FIG. 4 as appropriate, the body tube 14 is a synthetic resin having strength against external force (such as earth pressure), such as polyethylene, polyvinyl chloride, ABS (acrylonitrile / butadiene rubber / styrene), etc. And is formed into a straight pipe shape by extrusion molding or the like. The nominal diameter of the body tube 14 is, for example, 250 mm, and its length is, for example, 5210 mm.

  The body tube 14 includes a straight pipe portion 22 and an enlarged diameter receiving port 24 formed by expanding the diameter from one end of the straight pipe portion 22, and the other end of the straight pipe portion 22 is a difference port 26. A rubber groove 28 is formed on the inner surface side of the enlarged diameter receiving port 24, and a rubber ring 30 is attached to the rubber groove 28. The outlet 26 of the body tube 14 serves as a connection portion with the enlarged diameter receiving port 24 of the body tube 14 of the other cable protection tube 12 adjacent in the axial direction, and is inserted into the enlarged diameter receiving port 24 to be joined to the rubber ring. .

  Further, referring to FIG. 5 together with FIGS. 2 and 3, the sheath tube 16 is for securing a cable accommodation space individually (for example, for each type of cable) inside the body tube 14. The sheath tube 16 is made of a synthetic resin such as polyethylene, polyvinyl chloride, or ABS, and is formed into a straight tube shape by extrusion molding or the like. Inside the body tube 14, a plurality of sheath tubes 16 are aligned at a predetermined arrangement position, and are arranged in a state where a predetermined shape is maintained as a whole by an alignment member 38 described later, that is, in a collective state. . For example, in this embodiment, a total of 14 sheath tubes 16 of 8 large diameter sheath tubes 16 and 6 small diameter sheath tubes 16 are disposed inside the body tube 14, and the large diameter sheath tube 16. The nominal diameter is, for example, 50 mm, and the nominal diameter of the small-diameter sheath tube 16 is, for example, 30 mm.

  Each sheath pipe 16 includes a straight pipe portion 32 and an enlarged diameter receiving port 34 formed by expanding the diameter from one end of the straight pipe portion 32, and an end portion of the straight pipe portion 32 is a differential port 36. The length of each sheath tube 16 is set smaller than the length of the body tube 14, and is, for example, 5110 mm. The reason why the length of the sheath tube 16 is set smaller than the length of the body tube 14 is that the reception length of the diameter expansion receiving port 34 of the sheath tube 16 is the reception of the diameter expansion receiving port 24 of the body tube 14. This is because it is set smaller than the length. Moreover, the difference port 36 of the sheath pipe 16 becomes a connection part with the diameter expansion receiving port 34 of the sheath pipe 16 of the other cable protection pipe 12 adjacent to an axial direction, is inserted in the diameter expansion receiving port 34, an adhesive agent etc. It is adhesively bonded.

  Further, the alignment member 38 aligns the sheath tubes 16 in the body tube 14 so as to be in a predetermined arrangement position, and is formed of a soft material such as sponge, and each axial member in the body tube 14 is arranged in the axial direction. Arranged at the end. The alignment member 38 includes a main body 40 formed in a substantially disc shape, and the main body 40 is formed with a plurality of holes 42 penetrating in the thickness direction. For example, in this embodiment, the main body 40 of the alignment member 38 is formed with 14 holes 42 that match the diameter of each sheath tube 16, and the sheath tube 16 is inserted through each hole 42.

  The alignment member 38 is described in detail in Japanese Patent Application No. 2012-207696 filed earlier by the applicant of the present application and the like, so please refer to it if necessary.

  Next, a specific configuration of the identification caps 18 and 20 will be described.

  As described above, at the time of construction, identification caps 18 and 20 having identification information corresponding to each other are attached to both ends of each sheath tube 16 of the cable protection tube 12. That is, as shown in FIG. 2, the identification cap 18 is attached to the diameter expansion receiving port 34 (one end) of each sheath tube 16 of the cable protection tube 12, and the difference port 36 (the other end) of each sheath tube 16. The identification cap 20 is attached. Here, the identification caps 18 and 20 are caps given identification information.

  The identification caps 18 and 20 are provided with color information as identification information capable of individually identifying each of the sheath tubes 16. For example, in this embodiment, the entire identification caps 18 and 20 are respectively red, blue, green, and red so that the sheath tube 16 fitted with each of the identification caps 18 and 20 can be visually distinguished from the other sheath tubes 16. It is formed by coloring different colors such as yellow, gray, white, black, brown, and so on. Then, an identification cap 18 of an arbitrary color is fitted into the enlarged diameter receiving port 34 of each sheath tube 16 of the cable protection tube 12, and the identification attached to the enlarged diameter receiving port 34 of the outer tube 36 of the sheath tube 16. An identification cap 20 formed in the same color as the cap 18 is covered.

  6 and 7 together with FIG. 2, the identification cap 18 includes a cap body 44 formed of a synthetic resin such as polyethylene, polyvinyl chloride, or ABS. The cap body 44 has a short cylindrical shape with one end opened as an opening 44a and the other end sealed with a sealing portion 44b. The diameter of the cap body 44 is set according to the diameter of each sheath tube 16. The The axial length of the cap body 44 is, for example, 30 mm. Then, by inserting (fitting) the cap main body 44 into the enlarged diameter receiving port 34 of the sheath tube 16 from the sealing portion 44 b side, the identification cap 18 is attached to the tube end of the sheath tube 16. For example, the side wall of the cap main body 44 is formed in a tapered shape that gradually decreases in diameter from one end to the other end so that the side wall of the cap main body 44 can be easily fitted into the enlarged diameter receiving port 34.

  Further, a donut plate-like collar portion 46 is formed on the periphery of the opening 44 a of the cap body 44 so as to protrude outward in the radial direction. The flange 46 functions as a stopper when the cap main body 44 is fitted into the diameter expansion opening 34 of the sheath tube 16.

  Further, a protruding portion 48 protruding in the axial direction of the cap body 44 is formed in a part of the collar portion 46 in the circumferential direction. The protruding portion 48 is formed in a curved plate shape that curves along the outer edge of the flange portion 46, and protrudes on the opposite side of the cap body 44 so as to be orthogonal to the flange portion 46. The projecting portion 48 is provided so as to protrude outward in the axial direction from the tube end of the sheath tube 16 when the cap body 44 is fitted into the enlarged diameter receiving port 34 of the sheath tube 16. It functions as a handle (gripping part) so that 18 can be easily attached and detached. The length of the protrusion 48 is, for example, 25-30 mm.

  8 and 9 together with FIG. 2, the identification cap 20 includes a cap body 50 formed of a synthetic resin such as polyethylene, polyvinyl chloride, or ABS. The cap body 50 has a short cylindrical shape having one end opened as an opening 50a and the other end sealed by a sealing portion 50b. The diameter of the cap body 50 is set according to the diameter of each sheath tube 16. The The axial length of the cap body 50 is, for example, 30 mm. Then, the cap body 44 is put on (attached to) the outer surface of the outlet 36 of the sheath tube 16 from the opening 50 a side, whereby the identification cap 20 is attached to the tube end of the sheath tube 16. For example, the side wall of the cap body 44 is formed in a tapered shape that gradually decreases in diameter from one end to the other end so that the outer surface of the outlet 36 of the sheath tube 16 can be easily covered.

  In addition, a protrusion 52 that protrudes in the axial direction of the cap body 50 is formed in the vicinity of the center of the sealing portion 50 b of the cap body 50. The protruding portion 52 is formed in a rectangular plate shape, and protrudes to the opposite side of the cap body 50 so as to be orthogonal to the sealing portion 50b. The protruding portion 52 is provided so as to protrude outward in the axial direction from the tube end of the sheath tube 16 when the cap body 50 is fitted to the outer surface of the outlet 36 of the sheath tube 16. It functions as a handle so that it can be easily attached and detached. The length of the protrusion 52 is, for example, 25-30 mm.

  With reference to FIGS. 10 to 13 together with FIG. 1, a method for forming the cable protection pipe 10 by making the cable protection pipe 12 continuous in the axial direction will be described below.

  First, the excavation groove 100 is formed from the hand hole 102 at the starting point of the construction section of the cable protection conduit 10 to the hand hole 104 at the end point, and the Lotus pipe unit 106 on the starting point side is formed in the hand hole 102. An end point side Lotus pipe unit 108 is configured at 104. In addition, since such a Lotus pipe unit 106 and 108 is a well-known technique, the detailed description and illustration regarding the technique are abbreviate | omitted here.

  Briefly, in this embodiment, a so-called bolt fixing type in which a pipe component is inserted from the inside of the hand hole 102 and bolted to the duct sleeve 110 protruding from the hand hole 102 on the starting side. The lotus tube 112 is used. The connecting pipe members 114 and 116 are appropriately connected to the duct sleeve 110 and the bolt-fixed lotus pipe 112 on the starting side, respectively, and are unitized so that they can be connected to the pipe end on the outlet side of the cable protection pipe 12. It is configured as a starter side Lotus pipe unit 106. Similarly, in the hand hole 104 on the end side, a bolt-fixed lotus pipe 120 in which a pipe part is inserted into the duct sleeve 118 from the inside of the hand hole 104 and bolted to the duct sleeve 118 is used. The end part is formed as a unit so that the pipe parts 122 and 124 including the exchange joints are appropriately connected to the sleeve 118 and the bolt fixing type Lotus pipe 120 so as to be connected to the pipe end on the receiving side of the cable protection pipe 12. The Lotus pipe unit 108 is configured.

  However, the configuration of the Lotus pipe units 106 and 108 can be changed as appropriate without departing from the spirit of the invention.

  Next, a necessary number of cable protection pipes 12 are prepared at the construction site, and identification caps 18 and 20 having identification information corresponding to each other are attached to both ends of each sheath pipe 16 of each cable protection pipe 12. That is, the identification cap 18 colored in a different color is fitted into the diameter expansion receiving port 34 of each sheath tube 16 of the cable protection tube 12, and the diameter expansion receiving port 34 of each sheath tube 16 is connected to the own diameter expansion receiving port 34. The identification cap 20 formed in the same color as the identification cap 18 that is attached is covered.

  Subsequently, as shown in FIG. 10, the cable protection pipe 12 is carried into the excavation groove 100, and each sheath pipe 16 of the cable protection pipe 12 is pulled out (slid). Then, the identification cap 20 attached to the outlet 36 of each sheath pipe 16 is removed, and the body pipe 14 of the cable protection pipe 12 and the outlets 26 and 36 of the sheath pipe 16 are connected to the connecting pipe parts of the Lotus pipe unit 106 on the origin side. 114 and 116. At this time, inside the hand hole 102 on the starting point side, it is recorded which tube of the bolt-fixed lotus tube 112 is connected to the sheath tube 16 to which the color identification cap 20 is attached (that is, the correspondence relationship). It is preferable to keep them.

  10, 11, and 13, for simplification of the drawings, only two of the joint pipe component 116 of the Lotus pipe unit 106 and the sheath pipe 16 of the cable protection pipe 12 are illustrated, and the others are omitted. Please note that

  Subsequently, the next cable protection pipe 12 is carried into the excavation groove 100, and as shown in FIG. 11 (a), the cable protection pipe 12 is already installed in the excavation groove 100, that is, the Lotus pipe on the starting point side. The cable protection tube 12 connected to the unit 102 is arranged side by side in the axial direction.

  Then, as shown in FIG. 11 (b), the identification cap 18 is removed from the enlarged diameter receiving port 34 of an arbitrary (first connection) sheath pipe 16 of the existing cable protection pipe 12, and the newly introduced cable protection pipe 12, the sheath tube 16 corresponding to the first sheath tube 16 to be connected, that is, the sheath tube 16 to which the identification cap 20 of the same color as the identification cap 18 removed from the enlarged diameter receiving port 34 is attached is pulled out, The identification cap 20 is removed from the outlet 36 of the sheath tube 16.

  And as shown in FIG.11 (c), the insertion port 36 of the sheath pipe | tube 16 of the cable protection pipe | tube 12 newly carried in is inserted with respect to the diameter expansion receptacle 34 of the sheath pipe | tube 16 of the existing cable protection pipe | tube 12. They are bonded and bonded with an adhesive such as vinyl chloride resin or epoxy resin.

  Then, in the same manner as this, the identification cap 18 attached to the enlarged diameter receiving port 34 of the sheath tube 16 of the existing cable protection tube 12 and the outlet 36 of the sheath tube 16 of the newly loaded cable protection tube 12 are attached. While performing color matching with the identification cap 20, the sheath tubes 16 are connected one by one, and all the sheath tubes 16 of the cable protection tubes 12 arranged in the axial direction are connected.

  When the connection operation of each sheath tube 16 is completed, the insertion port 36 of the body tube 14 of the newly installed cable protection tube 12 is inserted into the enlarged diameter receiving port 34 of the body tube 14 of the existing cable protection tube 12. Then, they are joined to the rubber ring.

  As shown in FIG. 12, this operation is sequentially repeated so that the cable protection tube 12 newly introduced into the excavation groove 100 is connected to the continuous cable protection tube 12 from the starting-side side Lotus tube unit 106. The cable protection tube 12 is continued in the axial direction.

  When the cable protection pipe 12 reaches the vicinity of the Lotus pipe unit 108 on the end point side, as shown in FIG. 13, the lengths of the joint pipe parts 118 and 120 including the exchange joint are appropriately adjusted, and the start side The identification cap 18 attached to the enlarged diameter receiving port 34 of each sheath tube 16 of the continuous cable protection tube 12 is removed from the Lotus tube unit 106, and the enlarged diameter receiving port 24 of the body tube 14 of the cable protection tube 12 and the sheath tube 16. , 34 are connected to the connecting pipe parts 122 and 124 of the Lotus pipe unit 108 on the end point side. At this time, inside the hand hole 104 on the end point side, it is recorded which tube of the bolt-fixed lotus tube 120 is connected to the sheath tube 16 to which the identification cap 20 of which color is attached (that is, the correspondence relationship). It is preferable to keep them.

  As a result, the cable protection conduit 10 as shown in FIG. 1 is formed, and the operation is completed. Thereafter, a cable (not shown) is inserted into a cable housing space formed inside each sheath tube 16 of the cable protection tube 12 and used as a cable conduit.

  As described above, in this embodiment, the identification caps 18 and 20 having identification information corresponding to each other are attached to both ends of each sheath tube 16 of the cable protection tube 12, and the sheath of the cable protection tube 12 is provided. When connecting the tubes 16, the sheath tubes 16 corresponding to each other of the cable protection tubes 12 are connected to each other while visually identifying each of the sheath tubes 16 based on the identification information of the identification caps 18 and 20. I have to. Therefore, the operation | work which connects the mutually corresponding sheath tubes 16 of each cable protection tube 12 can be performed easily and correctly.

  In particular, since the identification caps 18 and 20 removed from the sheath tube 16 when the cable protection tubes 12 are connected to each other can be used any number of times, an operator can use each sheath of all the cable protection tubes 12 at the site every time it is installed. Compared with, for example, directly describing a number or the like at the tube end of the tube 16, the connection work can be performed more easily.

  Furthermore, since the sheath tube 16 is identified based on the identification information given to the identification caps 18 and 20 attached to the tube ends of the sheath tube 16, all the sheath tubes 16 of the cable protection tube 12 are connected. Even when formed with the same color and size, each of the sheath tubes 16 can be individually identified. Therefore, the same tube (tube member) can be used for each sheath tube 16 of the cable protection tube 12.

  For this reason, for example, as described in the above-mentioned patent document, there is no longer a situation in which only a specific color of the sheath tube is short during construction and the construction work must be temporarily interrupted, thereby improving the construction efficiency. be able to.

  Furthermore, since it is not necessary to color and form each sheath pipe | tube 16, the manufacturing cost of the sheath pipe | tube 16 can be reduced by that much. And even when performing a short section in the vicinity of the handhole 104 on the end point side of the construction section, for example, as described in the above-mentioned patent document, the color sheath tube of each color is cut to match the remaining section length. It is not necessary to manufacture each color sheath tube of a length, and it is possible to divide one tube and form a sheath tube 16 having a length corresponding to the section length. .

  Therefore, according to this embodiment, the cable protection conduit 10 can be efficiently formed at low cost.

  Furthermore, in a cable protection pipe such as the above-mentioned patent document, the collar sheath pipe is disposed inside the body pipe with its end opening opened. In many cases, sand or the like enters the inside of the end of the sheath tube when the cable protection tube is brought in. As a result, poor adhesion occurs when the sheath tubes 16 are connected to each other, or the cable is inserted into the sheath tube. However, in this embodiment, the end openings of the sheath tube 16 are closed by the identification caps 18 and 20 until just before the sheath tubes 16 of the cable protection tube 12 are connected to each other. When the cable protection tube 12 is carried into the excavation groove 100, foreign substances such as sand do not enter the inside of the sheath tube 16.

  In addition, by fitting the identification cap 18 inside the enlarged diameter receiving port 34 of the sheath tube 16, the inner surface of the enlarged diameter receiving port 34 is covered with the identification cap 18, so that the adhesion surface of the enlarged diameter receiving port 34 is The outer cap 36 is covered with the identification cap 20 by being covered with the identification cap 20 without being contaminated by foreign matters such as sand, and the outer cap 36 is covered with the identification cap 20. It is not contaminated by foreign matter such as sand.

  Therefore, according to this embodiment, it is possible to prevent problems such as adhesion failure when the sheath pipes 16 of the cable protection pipe 12 are connected.

  In this embodiment, the cap bodies 44 and 50 are entirely red, blue, green, and red so that the sheath tube 16 to which the identification caps 18 and 20 are attached can be visually distinguished from the other sheath tubes 16, respectively. It was formed by coloring in different colors such as yellow, gray, white, black, brown. That is, although the cap bodies 44 and 50 are formed in different colors, the cap bodies 44 and 50 need not be limited to this, and are easily visible from the outside when the identification caps 18 and 20 are attached to the sheath tube 16, For example, only the protrusions 48 and 52 may be colored in different colors.

  As described above, if the identification information is given to the projecting portions 48 and 52 provided so as to protrude outward in the axial direction from the tube end of the sheath tube 16 when the sheath tube 16 is attached to the tube end, the construction is performed. Since the identification information of the identification caps 18 and 20 is easily visible at times, the workability of the connection work between the cable protection tubes 12 is further improved.

  Next, modified examples of the identification caps 18 and 20 will be described with reference to FIGS. The identification caps 18 and 20 shown in FIGS. 14 and 17 are different from the above-described identification caps 18 and 20 in that they include string-like bodies 70 and 72 attached to the cap main bodies 44 and 50. Since the other configurations are the same, the same reference numerals are used for overlapping portions, and the description thereof is omitted or simplified.

  As described above, at the time of construction of the cable protection tube 12, the identification caps 18 and 20 each having identification information corresponding to each other are attached to both ends of each sheath tube 16. That is, the identification cap 18 is attached to the diameter-enlarged receiving port 34 (one end) of each sheath tube 16 of the cable protection tube 12, and the identification cap 20 is attached to the difference port 36 (the other end) of each sheath tube 16. Is done.

  14 and 15 together with FIG. 20, the identification cap 18 includes a cap body 44 formed of a synthetic resin such as polyethylene, polyvinyl chloride, and ABS, and a string-like body 70 attached to the cap body 44. Including.

  The cap body 44 has a short cylindrical shape with one end opened as an opening 44a and the other end sealed with a sealing portion 44b. The diameter of the cap body 44 is set according to the diameter of each sheath tube 16. The The axial length of the cap body 44 is, for example, 30 mm. The side wall of the cap main body 44 is formed in a tapered shape that gradually decreases in diameter from one end to the other end so that it can be easily fitted into the enlarged diameter receiving port 34. Two air vent holes 86 penetrating in the thickness direction are formed in the sealing portion 44b. The diameter of each hole 86 is 2 mm, for example.

  In addition, a donut plate-like flange portion 46 protruding outward in the radial direction is formed at the periphery of the opening 44 a of the cap body 44.

  Further, a string-like body 70 is attached to the cap body 44. The string-like body 70 is a twisted string or a braid made of synthetic fiber or natural fiber, and commercially available products can be used as appropriate. One end portion of the string-like body 70 is inserted into a hole 76 formed in the thickness direction at the central portion of the sealing portion 44b, and is tied in a knotted shape to prevent it from coming off, as can be seen from FIG. Further, in order to ensure that one end of the string-like body 70 from the hole 76 is prevented from coming off, a retaining member such as a plain washer 84 is attached between the cap body 44 and the knot. The length of the string-like body 70 is, for example, 520 mm. The string-like body 70 is provided so as to extend largely outward in the axial direction from the tube end of the sheath tube 16 when the cap main body 44 is fitted into the diameter expansion receiving port 34 of the sheath tube 16. Functions as a handle (gripping part) so that the identification cap 18 can be easily removed.

  In addition, as shown in FIG. 16, in this embodiment, a plurality of identification caps 18 are gathered together in advance by connecting the other ends of the string-like body 70 to each other. When the plurality of identification caps 18 are combined into one, each of the other end portions of the string-like body 70 of the identification cap 18 is tied in a double-fastened manner, and the annular portion 80 is formed. Then, the connecting string 74 is inserted into each of the annular portions 80, and both ends of the connecting string 74 are tied in a bow shape. Thereby, the string-like bodies 70 are connected to each other, and the plurality of identification caps 18 are integrated. As shown in FIG. 16B, in this embodiment, eight large-diameter identification caps 18 are combined into one corresponding to the eight large-diameter sheath tubes 16 disposed in the body tube 14. It is summarized. Further, as shown in FIG. 16 (a), six small diameter identification caps 18 are combined into one corresponding to the six small diameter sheath pipes 16 disposed inside the body pipe 14. Yes. Thus, the identification cap 18 can be prevented from being lost at the construction site.

  17 and 18 together with FIG. 20, the identification cap 20 includes a cap body 50 formed of a synthetic resin such as polyethylene, polyvinyl chloride, and ABS, and a string-like body 72 attached to the cap body 50. Including.

  The cap body 50 has a short cylindrical shape having one end opened as an opening 50a and the other end sealed by a sealing portion 50b. The diameter of the cap body 50 is set according to the diameter of each sheath tube 16. The The axial length of the cap body 50 is, for example, 30 mm. For example, the side wall of the cap body 50 is formed in a tapered shape that gradually decreases in diameter from one end to the other end so as to easily cover the outer surface of the outlet 36 of the sheath tube 16. Two air vent holes 90 penetrating in the thickness direction are formed in the sealing portion 50b. The diameter of each hole 90 is 2 mm, for example.

  A string-like body 72 is attached to the cap body 50. The string-like body 72 is a twisted or braided string made of synthetic fiber or natural fiber, and commercially available products can be used as appropriate. As can be seen from FIG. 18, one end of the string-like body 72 is inserted into a hole 78 formed in the thickness direction at the central portion of the sealing portion 50b, and is tied in a knotted shape to prevent it from coming off. Further, in order to ensure that one end of the string-like body 72 from the hole 78 is prevented from coming off, a retaining member such as a plain washer 88 is attached between the cap body 50 and the knot. The length of the string-like body 72 is, for example, 520 mm. The string-like body 72 is provided so as to extend largely outward in the axial direction from the tube end of the sheath tube 16 when the cap body 50 is fitted to the outer surface of the outlet 36 of the sheath tube 16. It functions as a handle so that the identification cap 20 can be easily removed.

  Further, as shown in FIG. 19, in this embodiment, a plurality of identification caps 20 are combined in advance by connecting the other end portions of the string-like body 72 to each other. When the plurality of identification caps 20 are combined into one, each of the other end portions of the string-like body 72 of the identification cap 20 is tied in a double-fastened manner, and an annular portion 82 is formed. Then, the connecting string 74 is inserted into each of the annular portions 82, and both ends of the connecting string 74 are tied in a bow shape. Thereby, the string-like bodies 72 are connected to each other, and the plurality of identification caps 20 are integrated. As shown in FIG. 19 (b), in this embodiment, eight large-diameter identification caps 20 are combined into one corresponding to the eight large-diameter sheath tubes 16 disposed inside the body tube. It is summarized. Further, as shown in FIG. 19A, six small-diameter identification caps 20 are combined into one corresponding to the six small-diameter sheath tubes 16 disposed inside the body tube 14. Yes. Collecting in this way prevents the identification cap 20 from being lost at the construction site.

  Further, the string-like bodies 70 and 72 are provided with color information as identification information for individually identifying the sheath tubes 16. In this embodiment, the string-like bodies 70 and 72 are respectively red, blue, green, yellow and gray so that the sheath tube 16 fitted with each of the identification caps 18 and 20 can be visually distinguished from the other sheath tubes 16. , White, black, brown, and so on. And the identification cap 18 provided with the string-like body 70 of arbitrary colors is fitted into the diameter expansion receptacle 34 of each sheath tube 16 of the cable protection tube 12, and its own diameter expansion receptacle is inserted into the gap 36 of the sheath pipe 16 The identification cap 20 including the string-shaped body 72 of the same color as the string-shaped body 70 of the identification cap 18 attached to the cover 34 is covered. In this embodiment, the cap bodies 44 and 50 themselves of the identification caps 18 and 20 are all formed in the same color without being specially colored. That is, the cap bodies 44 and 50 are not colored in different colors, but the identification caps 18 and 20 and the sheath tube 16 are identified based on the color information given to the string-like bodies 70 and 72. Since the string-like bodies 70 and 72 can be obtained as a commercial product at a low price, the manufacturing cost of the identification caps 18 and 20 can be reduced by omitting the coloring of the cap bodies 44 and 50 themselves.

  When connecting the sheath tubes 16 of the cable protection tube 12 using the identification caps 18 and 20 shown in FIGS. 14 and 17, the cords 70 and 72 of the same color are attached to both ends of each sheath tube 16 of the cable protection tube 12. The identification caps 18 and 20 provided with are attached. Then, a string-like body 70 of the identification cap 18 attached to the sheath tube 16 of one cable protection tube 12 and a string-like body 72 of the identification cap 20 attached to the sheath tube 16 of the other cable protection tube 12. While matching the colors, the corresponding sheath tubes 16 of the cable protection tubes 12 are connected to each other.

  Even when the cable protection conduit 10 is formed using the identification caps 18 and 20 shown in FIGS. 14 and 17, the identification cap is the same as when the identification caps 18 and 20 shown in FIGS. 6 and 8 are used. The operation of connecting the sheath pipes 16 corresponding to each other of the cable protection pipes 12 is easy and easy while visually identifying each of the sheath pipes 16 based on the identification information of the string-like bodies 70 and 72 included in the cables 18 and 20. Can be done accurately. Moreover, since the same pipe | tube can also be used for each sheath pipe | tube 16 of the cable protective pipe 12, the cable protective conduit 10 can be formed efficiently at low cost. Furthermore, since the end openings of the sheath tube 16 are closed by the identification caps 18 and 20 until just before the sheath tubes 16 of the cable protection tube 12 are connected, problems such as poor adhesion occur when the sheath tubes 16 are connected. Can be prevented.

  In the embodiment shown in FIGS. 14 and 17, the cap main bodies 44 and 50 are stringed so as to extend greatly outward in the axial direction from the tube end of the sheath tube 16 when the cap body 44 is attached to the tube end. Since the shaped bodies 70 and 72 are provided, the identification caps 18 and 20 can be easily removed from the sheath tube 16 by using the string-like bodies 70 and 72 as handles.

  Furthermore, if identification information is given to the string-like bodies 70 and 72 that are provided so as to extend greatly outward in the axial direction from the tube end of the sheath tube 16, the identification information of the identification caps 18 and 20 can be obtained during construction. Since it becomes easy to visually recognize, the workability of the connection work between the cable protection tubes 12 is further improved. Further, since the coloring of the cap bodies 44 and 50 themselves can be omitted, the identification caps 18 and 20 can be manufactured at a low cost.

  Furthermore, since the plurality of identification caps 18 and 20 are combined in advance by connecting the string-like bodies 70 and 72, it is possible to prevent the identification caps 18 and 20 from being lost at the construction site. In addition, since the plurality of identification caps 18 and 20 can be carried together, work efficiency is improved.

  In this embodiment, the cap bodies 44 and 50 themselves are not specifically colored, but are all formed in the same color, and the string-like bodies 70 and 72 are colored in different colors, whereby the identification caps 18 and 20 are colored. Although the identification information is given to, it is not necessary to be limited to this. For example, the cap bodies 44 and 50 may be colored in different colors, and the string-like bodies 70 and 72 may be formed in the same color. Further, the cap bodies 44 and 50 may be colored in different colors, and the string-like bodies 70 and 72 may be colored in the same color as the cap bodies 44 and 50 to which the strap bodies 70 and 72 are attached.

  In the embodiment shown in FIGS. 14 and 17, two air vent holes 86 and 90 having a diameter of 2 mm are formed in the sealing portions 44 b and 50 b of the cap main bodies 44 and 50. The size and number need not be limited to this.

  Furthermore, in this embodiment, the string-like bodies 70 and 72 are twisted strings or braids made of synthetic fibers or natural fibers, but the present invention is not limited to this. Various materials such as synthetic resin, rubber, metal, and leather can be used. Moreover, as the shape of the string-like bodies 70 and 72, a linear shape, a strip shape, a chain shape, a spiral shape, and the like are conceivable. For example, if the string-like bodies 70 and 72 are formed of a synthetic resin chain, the weight and durability will be improved, and even if the string-like bodies 70 and 72 are soiled by sand or mud during construction, Since the dirt can be easily washed away with water, the colors of the string-like bodies 70 and 72 can be accurately identified.

  Further, in the embodiment shown in FIG. 14 and FIG. 17, one end of the string-like bodies 70 and 72 is tied in a stop knot, and by attaching plain washers 84 and 88 between the cap body 44 and the knot, Although the string-like bodies 70 and 72 are prevented from coming off, the present invention is not limited to this. A commercially available cord stopper or the like may be used as the retaining member. Further, the retaining member is not necessarily provided.

  Further, in this embodiment, as shown in FIGS. 16 and 19, the plurality of identification caps 18 and 20 are combined by connecting the string-like bodies 70 and 72 via the connection string 74. The means need not be limited to this, and the string-like bodies 70 and 72 may be bound by a binding band or a ring. Alternatively, the string-like bodies 70 and 72 may be directly connected and connected.

  Further, in this embodiment, as shown in FIGS. 16 and 19, eight large-diameter identification caps 18 and 20 and six small-diameter identification caps 18 and 20 are combined into one each. However, it need not be limited to this. For example, a total of 14 of eight large diameter identification caps 18, 20 and six small diameter identification caps 18, 20 may be combined into one, or one large diameter identification cap 18, 20, and one A total of two identification caps 18 and 20 including identification caps 18 and 20 having small diameters may be combined into one. In short, the combination and number of identification caps 18 and 20 to be integrated can be changed as appropriate. Further, the string-like bodies 70 and 72 of the identification caps 18 and 20 are not necessarily connected to each other.

  In each of the above-described embodiments, the cap bodies 44, 50, the protrusions 48, 52, and the string-like bodies 70, 72 are not necessarily colored at the time of molding. It may be. Further, identification information may be given by attaching (wrapping) colored or numbered tapes to the cap bodies 44, 50, the protrusions 48, 52, or the string-like bodies 70, 72.

  Further, in each of the above-described embodiments, the identification cap 18 provided with arbitrary color information is fitted into the diameter-enlarged receiving port 34 of each sheath tube 16 of the cable protection tube 12, and the own cap is inserted into the outlet 36 of the sheath tube 16. Although the identification cap 20 provided with color information of the same color as the identification cap 18 attached to the enlarged diameter receiving port 34 is covered, the present invention is not limited to this, and both ends of each sheath tube 16 of the cable protection tube 12 are covered. Since the color information of the identification caps 18 and 20 attached to each other corresponds to each other according to a predetermined rule, the corresponding sheath tubes 16 of the respective cable protection tubes 12 can be connected while being visually identified. If there is, it is not necessary to use the identification caps 18 and 20 provided with the same color information.

  Further, the identification information does not necessarily have to be based on the coloring applied to the identification caps 18 and 20.

  For example, in the modified embodiment of the identification caps 18 and 20 shown in FIGS. 21 and 22, the identification information is character information, and the protrusions 48 and 52 of the identification caps 18 and 20 have A, B, C,. Character information 54 and 56 are displayed. Then, the identification cap 18 on which arbitrary character information 54 is displayed is fitted in the enlarged diameter receiving port 34 of each sheath pipe 16 of the cable protection tube 12, and its own enlarged diameter receiving port 34 is inserted into the outlet 36 of the sheath pipe 16. The identification cap 20 on which the character information 56 corresponding to the same or a predetermined rule as that of the identification cap 18 attached is displayed. When connecting the sheath tubes 16 of the cable protection tube 12, the identification cap 18 attached to the sheath tube 16 of one cable protection tube 12 and the identification cap 20 attached to the sheath tube 16 of the other cable protection tube 12 Then, the sheath pipes 16 are connected one by one while the character information 54, 56 is adapted.

  Even when the cable protection conduit 10 is formed using the identification caps 18 and 20 of this embodiment, each of the sheath pipes 16 is visually identified based on the identification information of the identification caps 18 and 20, It is possible to easily and accurately connect the sheath pipes 16 corresponding to each other of each cable protection pipe 12.

  Moreover, since the same pipe | tube can also be used for each sheath pipe | tube 16 of the cable protective pipe 12, the cable protective conduit 10 can be formed efficiently at low cost.

  The display method of the character information 54 and 56 may be arbitrary. Not only the character information 54 and 56 is displayed on the protrusions 48 and 52 by a paint, but also the character information 54 and 56 may be directly engraved into the protrusions 48 and 52, You may make it display on the method of sticking to 48,52, or combining them.

  Further, the character information 54, 56 is not necessarily displayed in alphabets such as A, B, C,..., And may be other types of characters such as numbers (numbers).

  Further, in addition to giving color information to the identification caps 18 and 20 as in the above-described embodiment, the character information 54 and 56 may be displayed.

  In short, if the identification caps 18 and 20 to which identification information corresponding to each other is attached to both ends of each sheath tube 16 of the cable protection tube 12, the type of the identification information is not particularly limited, Different types of identification information may be associated with each other.

  By the way, in any of the above-described embodiments, the identification cap 18 is attached to the diameter expansion receiving port 34 of each sheath tube 16 of the cable protection tube 12, and the identification cap 20 is attached to the outlet 36 of each sheath tube 16. However, the present invention is not limited to this, and identification caps 58 that can be attached to both the enlarged diameter receiving port 34 and the differential port 36 of the sheath tube 16 of the cable protection tube 12 are attached to both ends of each sheath tube 16. It may be.

  The identification cap 58 shown in FIGS. 23A and 23B includes a cap body 60 formed of a synthetic resin such as polyethylene, polyvinyl chloride, or ABS. The cap body 60 has a short cylindrical shape having one end opened as an opening 60a and the other end sealed by a sealing portion 60b. The diameter of the cap body 60 is set according to the diameter of each sheath tube 16. The Moreover, the axial direction length of the cap main body 44 is 30 mm, for example.

  On the periphery of the opening 60 a of the cap body 60, a donut plate-like flange portion 62 is formed so as to protrude outward in the radial direction. The flange portion 62 functions as a stopper when the identification cap 58 is attached to the enlarged diameter receiving port 34 of the sheath pipe 16 and when the identification cap 58 is attached to the outlet 36 of the sheath pipe 16.

  Furthermore, a first protrusion 64 that protrudes in the axial direction of the cap body 60 is formed in the flange portion 62. The first protruding portion 64 is formed in a short cylindrical shape along the outer edge of the flange portion 62, and protrudes on the opposite side of the cap body 60 so as to be orthogonal to the flange portion 62. The first projecting portion 64 is provided so as to protrude outward in the axial direction from the tube end of the sheath tube 16 when the identification cap 58 is attached to the enlarged diameter receiving port 34 of the sheath tube 16. It functions as a handle so that 18 can be easily attached and detached. The length of the 1st protrusion part 64 is 25-30 mm, for example.

  Further, a second protrusion 66 protruding in the axial direction of the cap body 60 is formed in the vicinity of the center of the sealing portion 60 b of the cap body 60. The second projecting portion 66 is formed in a rectangular plate shape, and projects to the opposite side of the cap body 60 so as to be orthogonal to the sealing portion 60b. The second projecting portion 66 is provided so as to protrude outward in the axial direction from the tube end of the sheath tube 16 when the identification cap 58 is attached to the insertion port 36 of the sheath tube 16. It functions as a handle so that it can be easily detached. The length of the 2nd protrusion part 66 is 25-30 mm, for example.

  As shown in FIG. 23 (a), such an identification cap 58 is formed by fitting the cap body 60 into the enlarged diameter receiving port 34 of the sheath tube 16 from the sealing portion 60b side. It is attached to. Further, as shown in FIG. 23B, the identification cap 58 is attached to the tube end of the sheath tube 16 by fitting the first projecting portion 64 into the outer surface of the insertion port 36. At this time, the 1st protrusion part 64 functions as a fitting part which covers the insertion opening 36 of the sheath pipe 16. FIG.

  If the cable protection conduit 10 is formed using such an identification cap 58, the same identification cap 58 can be used at both ends of the sheath tube 16 of the cable protection tube 12. Therefore, it is possible to reduce the types of manufacturing of the identification cap 58, and it is possible to further reduce the construction cost.

  Note that the specific numerical values such as the diameter and height described above are merely examples, and can be appropriately changed as necessary.

DESCRIPTION OF SYMBOLS 10 ... Cable protection pipe 12 ... Cable protection pipe 14 ... Body pipe 16 ... Sheath pipe 18, 20, 58 ... Identification cap 44, 50, 60 ... Cap main body 48, 52, 64, 66 ... Projection part 70, 72 ... String Shape 100 ... excavation groove

Claims (2)

A cable protection pipe construction method for forming a cable protection pipe by continuously connecting a cable protection pipe having a plurality of sheath pipes inside a body pipe,
(A) Two sets of a plurality of identification caps of the same color are prepared by attaching one end of a string having different color information and connecting the other ends of each string to each other , and each sheath tube Attaching two identification caps each having the two sets of the same color information string at both ends thereof,
(B) a step of installing a cable protection tube having identification caps at both ends of each sheath tube at a predetermined position in the excavation groove in the step (a);
(C) The identification cap attached in the step (a) is removed from one end of the sheath tube of the cable protection pipe installed in the excavation groove in the step (b), and the sheath of the existing cable protection pipe is installed in the excavation groove. Removing an identification cap having a string-like body of the same color information as the identification cap from one end of the tube; and (d) connecting the sheath pipes having the identification cap removed from the tube end in step (c). Including cable protection tube construction methods. An identification cap used in the construction method of the cable protection tube of claim 1,
An identification cap comprising a plurality of identification caps of the same color, one end of a string-like body having different color information attached to each identification cap, and the other end of each string-like body being connected together .

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