JP4601012B2 - Information pipe construction method for existing pipes and information pipe construction structure for existing pipes - Google Patents

Description

  The present invention relates to a method of constructing an existing pipeline in an information-compatible pipe and a construction structure of the information-compatible pipe.

  Currently, high-speed and ultra-high-speed communication networks are being constructed, and there are two methods for laying communication cables, which are the medium, aerial and underground. The communication cable laying in the underground burial method has characteristics such as protecting the spatial environment (aesthetics of the ground landscape, etc.) and being resistant to disasters such as earthquakes and typhoons, compared to the laying method in the aerial method. In particular, sewer pipes in underground pipes have branch pipes (mounting pipes) that are connected to the main pipes already led to homes, and the upper part of the pipes are vacant spaces, so communication with each home is possible. It is attracting attention as an important infrastructure for the FTTH (Fiber To The Home) project that draws in cables.

  In order to effectively use the empty space above the main pipe of such a sewer pipe, in recent years, a sheath pipe into which a communication cable can be inserted is attached to the inner surface of the upper part of the main pipe at regular intervals by a support tool such as a saddle. Information response pipes are buried in the ground and used as communication infrastructure.

  Japanese Patent Laid-Open No. 11-311369 discloses an information-compatible tube including a sheath tube for receiving a communication cable. This is shaped like a ring so that the support pipe curved along the outer peripheral surface of the sewer pipe and the sheath pipe pass through the inside so that it is supported by the upper outer peripheral surface of the sewer pipe. Use a sheath pipe support composed of a bracket attached to the inner side of the support plate so that it protrudes to the upper part of the sewer pipe through the provided through-hole, and is fitted to the upper part of the sewer pipe in the direction of the pipe axis. In each through hole provided at intervals, the respective brackets of the sheath pipe support are protruded from the respective through holes into the sewer pipe, and are attached so as to cover each through hole in a watertight state by the respective support plates. The sheath tube arranged along the tube axis direction of the road is supported by being inserted through the bracket of each sheath tube support. With such a configuration, the sheath pipe through which the communication cable is inserted into the upper part of the sewer pipe can be supported by a small occupied area. In addition, since the sheath pipe is supported at the upper part of the sewer pipe, there is no fear that the drainage capacity of the sewer pipe will be reduced. By attaching it to the sewer pipe in advance, the workability of the sewer pipe at the piping site is remarkable. improves.

JP 11-311369 A

  However, before the concept of an information-compatible pipe was born, a pipe without a normal sheath pipe was used as a sewer pipe. For this reason, in the information corresponding pipe as described above, it is necessary to dig up the surface layer portion corresponding to the upper outer peripheral surface of the sewer pipe buried in the ground and provide a through hole from the upper outer peripheral surface of the sewer pipe to attach the sheath pipe support. there were. Further, it is necessary to dig up and remove a normal pipe that does not have a sheath pipe, and to replace the sheath pipe with an information-compatible pipe attached with a sheath pipe support or a saddle.

  Therefore, changing a tube that does not have a normal sheath tube to an information-compatible tube involves a very large amount of work, so it is easy to attach a sheath tube to a tube that does not have a normal sheath tube to support information. There was a growing demand for tubes.

  Also, in order to lay a communication cable in each household via a branch pipe branched into the main pipe of the sewer pipe, the laying route is complicated, and the branch pipe has a small inner diameter. In fact, it is not implemented because it is technically difficult compared to the case where the communication cable is laid linearly in the main pipe due to being formed at various angles through the cable. In addition, as a technical difficulty when laying communication cables on branch pipes, communication cables must be installed so that the original function used as a lifeline is not hindered, Water resistance, chemical resistance, weather resistance, i.e., the ability to withstand being broken by being scratched by wrinkles, and the ability to withstand high pressure for high pressure cleaning for pipe inspection, etc. .

  In view of such a situation, the present invention can easily change a main pipe that does not have a sheath pipe into which a communication cable can be inserted into an information-compatible pipe in an existing pipe line in which a branch pipe branches off from the main pipe. It is an object of the present invention to provide an information-corresponding pipe construction method for existing pipes and an information-corresponding pipe construction structure for existing pipes.

The information corresponding tube construction method according to claim 1 for solving the above-mentioned problem, a main body portion in which a space portion for receiving a communication cable is formed, and the main body portion along the length direction of the main body portion A high-strength and low-stretch material body made of a belt-like fabric using at least the yarn having a high-strength and low-stretch property in the length direction. The high strength and low elongation material body is inserted through an existing hole through a hole and fixed to the inner wall of the human hole by applying tension, and the sheath pipe is fixed to substantially the upper part of the existing pipe . And after fixing the said sheath pipe to the substantially upper part of the said existing pipe line, the fitting part which can be fitted to the outer surface of the said sheath pipe, and the 1 or more space part which can connect a communication cable were formed. A guide tube is inserted into the existing pipeline, the fitting portion is fitted to the outer surface of the sheath tube, the guide tube is installed in the existing pipeline, and the weight of the guide tube is increased. It is a burden to the low-stretch material body .

According to such a method, it is possible to easily install a sheath pipe almost at the upper part of an existing pipe line to obtain an information-compatible pipe. In addition, since the high strength and low elongation material body, which is a material having high strength and low elongation, is integrated along the length direction of the main body, the main body is not a material having high strength and low elongation characteristics. But it doesn't stretch or sag. Further, by applying tension to the high-strength and low-elongation material body and fixing it to a substantially upper part in the existing pipe line, the existing pipe line can be easily used as an information-compatible pipe. In addition, even if the material of the main body is easy to stretch, it is reinforced by integrating a high-strength low-elongation material body, which is a material with high strength and low elongation, along the length direction of the main body. An effect can be obtained. In addition, when the sheath tube integrated with the main body and the high-strength low-stretch material body is drawn into the main pipe and installed, the high-strength low-stretch material body cannot be twisted with respect to the main body portion. It can be installed in existing pipelines. Further, by using a fabric using at least the length of a yarn having high strength and low elongation characteristics as a high strength and low elongation material body, it is easy to handle and prevent damage during production and pipe work. In addition, when applying tension to the high-strength and low-elongation material body and fixing it to the substantially upper part of the existing pipe line, if it is a fabric, the structure of the tension mechanism can be easily wound with a simple structure, Tension can be applied to the sheath tube. In addition, it is possible to fit a variety of guide tubes to the sheath tube, and a guide tube capable of inserting the number of cores of the branch communication cable can be fitted and attached to the sheath tube according to the site. Furthermore, by inserting the branch communication cable into the guide tube fitted to the outer surface of the sheath tube, it can be used as an information-compatible tube connected to each home. In addition, since the guide tube can be used as a separate room for the trunk cable (communication cable), the communication cable can be easily increased later.
The method for constructing an information-compatible tube according to claim 2 for solving the above-mentioned problem has a hole portion through which the high-strength and low-elongation material body penetrating in the radial direction is passed in claim 1, and is rotated. The high-strength and low-tensile material body passed through the hole is rolled up, and after the high-strength and low-tensile material body is rolled up , a stopper having a through-hole that matches the outer shape of the one end is formed in the through-hole. The sheath pipe is fixed to substantially the upper part of the existing pipe line by using a tension device including a winding drum that cannot be rotated by being attached so that the one end is fitted .

Information corresponding pipe construction method according to claim 3 for solving the above problems, according to claim 1 or 2, for pulling the branch pipe sheath tube is inserted through the branch communication cable or called line to the internal The branch sheath tube provided at the tip with a nose, which is a member that can be gripped or hooked by a gripping jig or a hooking jig inserted from the branch pipe rod , branches to the outer surface of the guide pipe attached via an ingredient, the guide tube is fixed fitted to the sheath tube, removed the whistle from the branch pipe basins, is to install the branch pipe sheath tube to the branch pipe .

  According to such a method, the branch communication cable is not exposed in the existing pipe, and in the main pipe of the existing pipe, in the main pipe of the existing pipe, in the branch pipe branched from the main pipe, the sheath pipe for the branch pipe Protected by. Therefore, there is no disconnection due to high-pressure washing or dredging used during pipe inspection.

The information-corresponding pipe construction structure for an existing pipe line according to claim 4 for solving the above-mentioned problem is a main body part in which a space part for receiving a communication cable is formed, and a length direction of the main body part. And a high-strength low-tensile material body made of a belt-like fabric that is provided integrally with the main body and uses at least the yarn having high strength and low elongation characteristics in the length direction. tube, the high-strength tension applied by the installed tension device to the low elongation material body manhole of an existing pipeline is fixed to the substantially upper portion of the existing conduit is placed in front Symbol manhole 1 or more space parts which penetrate the branch communication cable branched from the said communication cable penetrated by the said space part of the said sheath pipe in a branch connection box, and the fitting part which can be fitted to the outer surface of the said sheath pipe the high-strength low-elongation property material the weight of the guide tube with bets The fitting portion so as to bear on the body is fitted on an outer surface of the sheath tube, the the space portion of the sleeve pipe the communication cable is the incoming lines, the space of the guide tube the branch communication cable incoming line It is what has been.

According to such a construction structure, the sheath pipe in which the high-strength low-extension material body is integrated along the length direction is applied to the high-strength low-extension material body by applying tension to the substantially upper part in the existing pipe line. Fit the guide tube with the sheath tube for the branch tube on the outer surface of the sheath tube, insert the communication cable into the space part of the sheath tube, and enter the branch communication cable branched from the communication cable into the space part of the guide tube Depending on the structure, it can be used as an information response tube connected to each home. In addition, the structure is such that the weight of the sheath tube, guide tube, etc. installed in the existing pipeline is borne by the high-strength, low-elongation material body integrated with the main body of the sheath tube, so the other members are reinforced strongly There is no need to apply.
Information corresponding tube constructed structure of the existing pipeline of claim 5 for solving the above problems, according to claim 4, the guide tube is inserted through the branch communication cable or called line to the internal branch The branching sheath tube provided with a nose, which is a member having a shape that can be gripped or hooked by a gripping jig or a hooking jig inserted from the branching pipe for pulling out the sheathing tube, , in which is mounted through a branch member in the outer surface of the guide tube.

  An embodiment of the present invention will be described below with reference to FIGS. In the following description, a sewer pipe is assumed as the pipe. However, in the present invention, the pipe is not necessarily limited to the sewer pipe. For example, a steel pipe is used as long as the pipe is buried in the ground. The present invention is applicable to all types of pipelines such as used gas pipelines, water pipelines using cast iron pipes, rainwater pipelines, and power cable pipelines. Moreover, when no manhole is provided in the section of the underground pipeline, the present invention can be implemented by forming a shaft.

  First, the configuration of the existing pipeline will be described with reference to FIG. In FIG. 10, 5 is a main pipe of a sewer pipe, and is piped between human holes 9 and 10 such as manholes. The branch pipe 7 branches from the upper side of the main pipe 5 at the branch pipe port 38, and the branch pipe 7 is connected to the branch pipe rod 43 which is the end of the branch pipe 7 of each household 8. Is configured.

  In general, the main pipe 5 is laid at a depth of several meters along the road, a branch pipe port 38 is formed on the upper side of the main pipe 5 on the oblique side, and the branch pipe 7 is connected to the branch pipe rod 43 from the branch pipe port 38. It is connected to the.

  Next, the sheath tube used for constructing the information correspondence tube will be described. FIG. 2 is a perspective view of the sheath tube of the present embodiment. This sheath tube 1 has a cylindrical main body 3 having a space 2 into which a communication cable 6 can be inserted, and a high strength integrated in the main body 3 along the length direction of the main body 3. It consists of a low elongation material body 4. The length of the main body 3 of the sheath tube 1 is substantially equal to the length of the main pipe 5, and the length of the high-strength / low-extension material body 4 is longer than the length of the main body 3.

  Moreover, the cross-sectional view of the sheath tube shown in FIG. 1 (a) corresponds to the aforementioned sheath tube 1, and as shown in FIG. 1, a high strength made of a belt-like fabric is formed within the thickness of the cylindrical main body portion 3. The low elongation material body 4 is embedded and integrated. The embedded high-strength and low-tensile material body 4 can also be a thread or rope-like fabric.

  Moreover, in FIG.1 (b) thru | or FIG.1 (h), sectional drawing of the other embodiment of a sheath pipe is shown, and not only the sheath pipe 1 of FIG. All are applicable as well. The sheath pipes 1b and 1c shown in FIGS. 1B and 1C are the outer peripheral surface 5b or the inner peripheral surface 5c of the cylindrical main body portions 3b and 3c having the space portions 2b and 2c into which the communication cable 6 can be inserted. In addition, the high-strength low-elongation material bodies 4b and 4c are integrated along the length direction of the main body portions 3b and 3c. In this case, a belt-like fabric can be used for the high-strength and low-elongation material bodies 4b and 4c. It is also possible to integrate the high-strength and low-elongation material bodies 4b and 4c into the main body portions 4b and 4c with an adhesive or the like.

  The sheath pipes 1d and 1e shown in FIGS. 1 (d) and 1 (e) are provided with convex protrusions 5d on the outer periphery of cylindrical main body parts 3d and 3e having spaces 2d and 2e into which the communication cable 6 can be inserted. The fitting part which consists of the concave-shaped groove part 5e is formed, and the high intensity | strength low-tensile-strength material body 4d and 4e are formed along the length direction of the main-body parts 3d and 3e in the thickness of the main-body parts 3d and 3e. It is buried and integrated. In this case, the high-strength and low-elongation material bodies 4d and 4e can use yarn or rope-like fabrics. Further, by providing fitting portions on the outer circumferences of the sheath tubes 1d and 1e, it becomes possible to fit various guide tubes to the sheath tubes 1d and 1e, and the number of cores of the branch communication cable according to the site. Can be attached by fitting the guide tube into the sheath tubes 1d and 1e.

  A sheath tube 1f shown in FIG. 1 (f) is a rectangular tube-shaped main body portion 3f having a space portion 2f into which a communication cable 6 partitioned by a partition plate 5f can be inserted at the center portion, and an upper portion of each space portion 2f. A high-strength, low-elongation material body 4f is embedded in the wall thickness along the length direction of the main body 3f and integrated. In this case, the high-strength and low-elongation material body 4f can be a thread, a belt, or a rope-like fabric. In addition, since there are a plurality of space portions 2f, a large number of communication cables can be inserted.

  A sheath tube 1g shown in FIG. 1 (g) includes a cylindrical main body portion 3g having a partition portion 5g formed from the center toward the inner surface and having a space portion 2g into which the communication cable 6 can be inserted. 4 g of a high-strength low-elongation material body is embedded along the length direction and integrated. In this case, as the high-strength and low-elongation material body 4g, a thread, a belt, or a rope-like fabric can be used. Since the sheath tube 1g has a plurality of space portions 2g as in the case of the sheath tube 1f described above, a large number of communication cables can be inserted.

  A sheath tube 1h shown in FIG. 1 (h) is formed of a cylindrical main body 3h having a space 2h into which the communication cable 6 can be inserted, and is formed of a cylindrical fabric in the circumferential direction of the thickness of the main body 3h. The high-strength low-elongation material body 4h is embedded and integrated along the length direction. In this case, the high-strength low-elongation material body 4h uses a cylindrical cloth, and as shown in FIG. 1 (h), the entire body portion 3h is embedded by being embedded in the circumferential direction of the body portion 3h. It becomes difficult to be deformed and the strength of the main body 3h is improved, and the communication cable 6 entering the space 2h can be protected.

  As described above, various shapes can be applied to the cross-sectional shape of the sheath tube, and the body portion having a space in which the communication cable 6 can be inserted and the high-strength low-stretch material body along the length direction. Are not particularly limited. In addition, the main-body part of the sheath pipe mentioned above is the length substantially equal to the main pipe | tube installed.

  Since the main body and the high-strength and low-tensile material body are integrated, the above-described sheath tube does not stretch and sag even if the main body is made of an easily stretchable material such as low-density polyethylene.

  Moreover, the thread | yarn using the high strength low elongation fiber called a metal wire or a super fiber, or the fabric using the thread | yarn in the length direction is applicable to a high intensity | strength low elongation material body. As a general definition of this super fiber, it refers to a fiber having a strength of 2 GPa or more and an elastic modulus of 50 GPa or more. There are glass fiber, para-aramid fiber, carbon fiber, steel fiber, ultra-high strength polyethylene fiber, PBO (poly-p-phenylenebenzobisoxazole) fiber, polyarylate fiber, etc. Is possible.

  If the yarn used for the high-strength low-stretch material body is poor in chemical resistance depending on the application, the high-strength low-stretch material body is coated with a corrosion-resistant coating and then integrated with the main body of the sheath tube. Is preferable. As the corrosion-resistant coating, polyethylene and polypropylene are typically representative, but a material having chemical resistance suitable for the type of pipe used can be appropriately applied. In addition, even when wear resistance and cut resistance are poor, by similarly forming a corrosion-resistant coating such as polyethylene and polypropylene, the most cost-effective high strength and low elongation characteristics can be obtained from a wide range of types. It becomes possible to select the thread to have.

  In addition, as the fabric, various forms such as a woven fabric, a knitted fabric, a braided fabric, a belt-shaped fabric made of nonwoven fabric, or a rope-shaped fabric can be used, but at least a yarn using a high-strength low-tensile fiber is used as the main body portion. It is arranged substantially linearly in the length direction of the yarn, and has a configuration capable of exhibiting the effect of high strength and low elongation of the yarn. For example, in the case of woven fabrics, take measures to reduce the elongation caused by the structure by using thin yarns for wefts and preventing waves of high-strength, low-extension fibers used for warp yarns as much as possible. Is good.

  The above-described high-strength low-stretch material body can be integrated with the main body by being embedded in or bonded to the main body of the sheath tube. In addition, when the sheath tube integrated with the main body and the high-strength low-stretch material body is drawn into the main pipe and installed, the high-strength low-stretch material body cannot be twisted with respect to the main body portion. It can be installed in the main pipe 5. Although the example about the manufacturing method of the sheath tube 1 shown to Fig.1 (a) is shown in this Embodiment demonstrated below, it does not specifically limit.

  Ten high-strength, low-tensile-strength material bodies 4 integrated with the main body 3 of the sheath tube 1 are drawn together by twisting seven 1500d made of polyarylate fiber filaments and warping them (the length of the main body). A weft yarn of 137 times / 100 mm of a main twist made of a filament group of polyester fibers is used as a weft to form a belt-like fabric having a width of 17 mm and a thickness of 1.8 mm. I used it. By using this fabric, it is easy to handle at the time of manufacturing and in-pipe work, and damage is less likely to occur.

  The above-mentioned polyarylate fiber has good chemical resistance such as acid resistance and water resistance, and also has good creep characteristics, and is therefore optimal for applications in which a load is always applied in an environment such as a sewer pipe. In addition, since the wear resistance and the cut resistance are also good, even when bent from the main pipe 5 to the human holes 9 and 10 and attached to the tension mechanism, it is hard to be damaged and the strength is not easily lowered.

  Next, the sheath tube 1 was manufactured using a low density polyethylene having a density of 0.919 for the main body portion 3 of the sheath tube 1. As a manufacturing method of the sheath tube 1, a slit is made in an inner lip used for pipe molding of the main body 3, and a high-strength / low-elongation material body 4 is drawn out from the slit and positioned between the inner and outer lips, and extrusion molding is performed. Thus, a sheath tube 1 was manufactured in which a high-strength, low-elongation material body 4 was integrated with a cylindrical main body 3 having an outer diameter of 34 mm and an inner diameter of 28 mm (see FIG. 1A). Thus, an inexpensive and inexpensive sheath tube can be manufactured.

  Of the sheath pipes described above, the construction structure using the sheath pipe 1 and using the existing pipe line as the information-compatible pipe is described, but is not particularly limited.

  FIG. 10 is a diagram showing a construction structure in which an existing pipe line according to the present embodiment is an information-compatible pipe. The information corresponding pipe construction structure of the main pipe 5 (hereinafter also referred to as “existing pipe line 5”) of the existing pipe line shown in FIG. 10 includes a main body part 3 in which a space part 2 into which a communication cable 6 can be inserted is formed, As shown in FIG. 10, a sheath tube 1 including a high-strength low elongation material body 4 provided integrally with the main body portion 3 along the length direction of the portion 3 has human holes 9, 10. The high strength and low elongation material body 4 is inserted into the main pipe 5 through the tension hole 22 and is tensioned by a tension device 22 provided on the inner walls of the human holes 9 and 10 and fixed to a substantially upper part in the main pipe 5. Built. The main pipe 5 is connected through human holes 9 and 10 such as manholes. A connection branch box 11 is installed in the human hole 9 and the like. Communication cables 6 (hereinafter also referred to as “trunk communication cable 6”) inserted through a sheath tube 1 installed substantially at the top are connected.

  As described above, the high-strength and low-stretch material body 4 of the sheath tube 1 is longer than the length of the main body 3, and therefore the high-strength and low-strength material body 4 is placed in a tension device 22 (described later) provided in the human holes 9 and 10. Since the extensible material body 4 can be wound up and tension can be applied to the high-strength and low-extensibility material body 4, it can be easily fixed to substantially the upper portion in the main pipe 5. In addition, the tension mechanism and the structure at the end of the sheath tube can be simplified compared to the case where the sheath tube is installed in the existing pipeline by applying tension to the sheath tube itself.

  Next, a tension device 22 for fixing the sheath tube 1 to a substantially upper part in the main tube 5 will be described with reference to FIGS. 3, 4A, and 4B. As shown in FIGS. 3, 4 (a) and 4 (b), a tension device 22 is installed on the inner walls of the human holes 9 and 10. The tension device 22 is fixed by an anchor bolt 29 at a position where the sheath tube 1 is installed at a substantially upper portion in the main tube 5. In the tension device 22, a winding drum 24 for holding the high-strength and low-elongation material body 4 is fixed by a bracket 28. As shown in FIG. 4B, recesses 33 are formed at both ends of the winding drum 24 so that the tip ends of the bolts 32 do not come into contact with each other, and nuts 25 are attached to both end surfaces by welding. . One nut 25 is fitted with a stopper 30 having a through-hole adapted to the nut 25 so that the nut 25 cannot be rotated, and the stopper 30 cannot be removed with a bolt 32 via a washer 31.

  When the high-strength and low-elongation material body is wound around the winding drum 24 through the human hole 9, the bolt 32 and the stopper 30 attached to the nut 25 at one end of the winding drum 24 are removed, and FIG. As shown, a high-strength low-tensile material body 4 made of a belt-like fabric is passed through a hole 24a passing through the center axis of the winding drum 24, and the end of the high-strength low-stretch material body 4 is wound. The high strength low elongation material body 4 wound around the drum 24 is wound in the winding direction along the winding drum 24 to the vicinity of the entrance of the hole 24a, and then wound in the direction in which the high strength low elongation material body 4 is wound. The drum 4 was rotated, the high-strength low-stretch material body 4 was wound into the tension device 22, and the end of the sheath tube 1 was positioned at a predetermined position, and the winding drum 24 was removed so as not to rotate. The stopper 30 is fitted to the nut 25 and the bolt 32 Shimete fixed.

  Similarly, the high-strength / low-tensile material body 4 at the other end is set in the tension device 22 installed in the human hole 10, and the high-strength / low-stretch material body 4 is wound on the winding drum 24. By fixing the winding drum 24 in a non-rotatable manner, the sheath tube 1 can be fixed to substantially the upper portion of the main tube 5 in a state where tension is applied to the high-strength / low-elongation material body 4.

  Further, as shown in FIGS. 3 and 4A, a receiving roller 26 is attached to the tension device 22 at the bent portion of the high-strength low elongation material body 4 from the sheath tube 1 to the tension device 22. . Since the receiving roller 26 is attached in this way, the high strength and low elongation material body 4 is not rubbed with the end portion of the main pipe 5 when tension is applied. Further, a cover 27 is attached to the tension device 22, and the high-strength and low-elongation material body 4 in a state where tension is applied can be protected.

  In this way, it becomes possible to easily attach the sheath tube 1 in which the high-strength and low-stretch material body 4 and the main body 3 are integrated to the main tube 5, and an information-corresponding tube is constructed so that the inside of the sheath tube 1 is formed. The trunk communication cable 6 can be inserted.

  As described above, the construction structure of the information corresponding pipe in which the sheath pipe 1 is installed in the main pipe 5 of the existing pipeline and the trunk communication cable 6 is inserted into the sheath pipe 1 has been described. A construction structure in which the branch communication cable 21 is laid down to the branch pipe rod 43 located at the end of the branch pipe 7 and the entire existing pipe line is used as an information corresponding pipe will be described below.

  In the existing pipe line in which the branch pipe 7 is connected to the main pipe 5 as shown in FIG. 11, the guide in which the branch pipe sheath pipe 37 is provided in the sheath pipe 1 installed substantially in the main pipe 5. The branch pipe sheath tube 37 is installed in the branch pipe 7 that is connected to the main pipe 5 and is connected to the main pipe 5 by fitting the pipe 12, and the branch communication cable 21 is located at the end of the branch pipe 7. The entire existing pipeline including the branch pipe 7 is constructed as an information-corresponding pipe.

  The guide tube 12 shown in FIG. 5 represents a state before being fitted to the sheath tube 1, and the shape shown in FIG. 5 is particularly suitable in the present embodiment, and the guide tube 12 with respect to the sheath tube 1 is suitable. In order to increase the fitting force, the fitting portion 13 of the guide tube 12 is squeezed and formed. The guide tube 12 is preferably made of a resin such as polyethylene because of its light weight and chemical resistance, but other materials can be selected depending on the type of the existing pipeline.

  A guide tube 12 shown in FIG. 5 is used to further insert a communication cable into the main tube 5. The guide tube 12 has a longitudinal direction along the sheath tube 1, a fitting portion 13 for fitting on the outer surface of the sheath tube 1, and mainly a branch communication cable 21 (refers to a general “lead-in wire”). And a space portion 14 formed in the inside in order to pass through. The space portion 14 is formed around the fitting portion 13, and is partitioned vertically by the partition plate 15 so as to form a plurality of layers (14a, 14b,...), And each of the layers (14a, 14b,. ..)) Is connected to the branch communication cable 21. In addition, when installing the guide pipe | tube 12 in the main pipe | tube 5 so that it may mention later, it is preferable to penetrate the call line 41 for replacing with the branch communication cable 21 beforehand.

  FIG. 6 is an explanatory diagram of a state in which the guide tube is fitted to the sheath tube according to the present embodiment. The sheath pipe 1 is installed at a substantially upper part of the main pipe 5 and a trunk communication cable 6 is inserted therein. A guide tube 12 is fitted on the outer surface of the sheath tube 1 with a fitting portion 13. Since the guide tube 12 is made of a resin such as polyethylene, and the fitting portion 13 is deformed so as to be bent once, the guide tube 12 is quickly elastically recovered, so that the guide tube 12 can be easily fitted on the outer surface of the sheath tube 1. Moreover, since it is the structure which bears the weight of the sheath pipe 1 installed in the existing pipe line, the guide pipe | tube 12, etc. to the high intensity | strength low elongation material body 4 integrated with the main-body part 3 of the sheath pipe 1, other members Does not require strong reinforcement.

  The branch communication cable 21 inserted through the guide tube 12 described above is a communication cable branched from the trunk communication cable 6 in the branch connection box 11 installed in the human hole 9 or the like, and is connected to each home 8 as described later. And laid. The trunk communication cable 6 is branched from the trunk communication cable 6 by the required number according to the number of households 8 that need to be laid.

  In addition, the height of each layer of the space portion 14 of the guide tube 12 is divided so as to be smaller than twice the outer diameter of the branch communication cable 21, and thereby, a plurality of branch communication cables 21 are provided in each layer. Even if the branch communication cable 21 is inserted, the branch communication cable 21 does not get over the adjacent branch communication cable 21 and the arrangement in the hierarchy is not changed. Therefore, the branch communication cable 21 does not get entangled and a wiring mistake to each home does not occur.

  As shown in FIG. 11, after the guide tube 12 described above is fitted and installed in the sheath tube 1, the loosening prevention material 50 including the substantially C-shaped fixing portion 51 having the recess 52 in the center portion shown in FIG. Further, by arranging a plurality of the main pipes 5 at appropriate intervals, it is possible to prevent the guide pipe 12 from loosening in the inner diameter direction of the main pipe 5. Further, it is possible to prevent the guide tube 12 from being detached from the sheath tube 1 during a high-pressure washing operation or the like in the pipeline maintenance management operation. The substantially C-shaped fixing part 51 of the slack preventing material 50 is fixed to the inner wall of the main pipe 5 while the guide pipe 12 is accommodated in the concave part 52.

  Next, as shown in FIG. 7, the branch pipe sheath pipe 37 is attached to the guide pipe 12 via the branch tool 39. As shown in FIG. 7, the branching tool 39 is held and fixed by a coupling member 39 a that fits to the outer surface of the guide tube 12. Further, a communication hole 40 for taking out the branch communication cable 21 and the call wire 41 from the guide tube 12 is formed in the guide tube 12 at a position where the branch tool 39 is provided. Further, the position where the branching tool 39 is provided in the guide pipe 12 is provided in the vicinity of the branch pipe port 38 where the main pipe 5 to the branch pipe 7 are connected. A branch pipe sheath tube 37 is attached to such a branching tool 39 as shown in FIG. 7, and the branch communication cable 21 or the call line 41 inserted through the space 14 of the guide pipe 12 is connected to the branching tool 39 from the guide pipe 12. Through the branch pipe sheath pipe 37.

  As the branch communication cable 21 described above, a four-fiber optical fiber is passed through a stainless steel tube, and a cable having an outer surface covered with polyethylene and having a thickness of about 5 mm can be suitably used in this embodiment. Also, as the nominal line 41, a urethane tube-like object or string-like object having an outer diameter substantially equal to the outer diameter of the branch communication cable can be suitably used. In addition to the four-core type, a two-core type or other types of branch communication cables can be used.

  Further, the branch pipe sheath pipe 37 can use a flexible pipe made of stainless steel or plastic, and finally, the branch communication cable 21 is inserted inside. This branch pipe sheath pipe 37 protects the branch communication cable 21 from the outside, prevents damage and deterioration, and also installs the branch communication cable 21 in the branch pipe 7 by applying tension as will be described later. Fulfill. This branch pipe sheath pipe 37 has a bending radius characteristic equal to or larger than the allowable bending radius of the branch communication cable 21 so as not to bend to less than the minimum bending radius (allowable bending radius) of the branch communication cable 21 inserted therein. used. This is to prevent the branch communication cable 21 inserted into the branch pipe sheath pipe 37 from being extremely bent below the allowable bending radius and being damaged.

  As shown in FIG. 11, the branch pipe sheath pipe 37 into which the branch communication cable 21 is inserted is disposed along the upper side of the branch pipe 7 to the branch pipe rod 43 at the end of the branch pipe 7. Yes. The branch pipe rod 43 is provided with a tension mechanism 45 through which the branch pipe sheath pipe can be inserted and tightened. The tension mechanism 45 applies tension to the branch pipe sheath pipe.

  Even if the branch pipe 7 has a curved portion, in order to ensure that the branch pipe sheath pipe 37 is fixed to the upper side of the branch pipe 7, for example, at the center as shown in FIG. It is desirable to use a fixing member 55 composed of a substantially C-shaped fixing portion 56 having a recess 57. By using such a fixing member 55 and the like, the branch pipe sheath pipe 37 to which tension is applied is surely installed on the upper side of the branch pipe 7 (see FIG. 11). As described above, the branch pipe sheath pipe 37 is attached to the upper side of the branch pipe 7, thereby preventing the flow of sewage and the like, thereby inhibiting the function as a lifeline, or being broken by a scissor. It is possible to prevent it from getting stuck.

  The branch communication cable 21 is laid from the guide pipe 12 to the branch pipe rod 43 by arranging the branch pipe sheath pipe 37 along the upper side of the branch pipe 7 as described above. The branch pipe rod 43 is open close to each home 8, and the branch communication cable 21 guided to the branch pipe rod 43 is drawn out to the ground and then terminated at each home 8. It is pulled into the box 44.

  As described above, the branch communication cable 21 is first laid in the guide pipe 12, and then the branch communication cable 21 corresponding to each branch pipe 7 reaching the branch pipe rod 43 corresponding to each home 8 is provided. Protected and laid by the branch pipe sheath pipe 37.

  According to this structure, it is possible to realize a structure in which an existing pipe line composed of the main pipe 5 which is an information-compatible pipe and the branch pipe 7 connected to the main pipe 5 is constructed as an information-compatible pipe as a whole, and the branch communication cable. A structure in which 21 can be easily laid in the branch pipe 7 is realized. Further, according to this structure, the branch communication cable 21 is inserted into the branch pipe sheath pipe 37 and installed in the branch pipe 7, so that even if the laying route of the branch communication cable 21 is complicated, the branch pipe 7 can be easily constructed as an information-compatible pipe, the connection angle of the branch pipe 7 to the main pipe 5 and the function as a lifeline are not disturbed, water resistance, chemical resistance, weather resistance, high pressure washing resistance, etc. The requirement of having the above functions is also achieved.

  As shown in FIG. 7, the branch pipe sheath pipe 37, called a clerk, is pulled out from the main pipe 5 from the branch pipe rod 43 located at the end of the branch pipe 7 at the tip of the branch pipe sheath pipe 37. A member 42 is provided. This nick 42 is like a hollow sphere whose outer diameter is about 80% of the inner diameter of the branch pipe 7, but it is not particularly limited and may be in the shape of a ring or the like that can be hooked or grasped. If it is good. It is also possible to directly hook the branch pipe sheath pipe 37.

  Further, in order to prevent the plurality of branch communication cables 21 in the guide tube 12 from being entangled, the location of the branch communication cable 21 in the guide tube 12 is related to the position of the branch tube 7 extending to each home 8. It is desirable to follow regular placement rules. That is, the branch communication cable 21 is extended in the width direction in the guide tube 12 so that the branch communication cable 21 located on the outermost side can be taken out from the manhole 9 toward the inside of the main pipe 5 (see FIG. 11). It is preferable to follow a placement rule such as parallel. It is preferable to perform the same operation when the call line 41 is inserted instead of the branch communication cable 21.

  Next, the information-corresponding tube construction method according to the present invention will be described while omitting portions that overlap with the above-described information-corresponding tube construction structure. The following description shows an embodiment of the present invention.

  First, for the inside of the main pipe 5 of the existing pipe line to be constructed as an information-compatible pipe by laying the branch communication cable 21, using a TV camera or the like, the distance between the human holes 9, 10 and the main hole 9 to the main pipe 5 The distance from each branch pipe 7 to the branch pipe port 38, the distance from the branch pipe 7 to the branch pipe rod 43, the depth of the branch pipe rod 43, etc. are accurately measured (see FIG. 11).

  Based on the data obtained from the survey of the existing pipes as described above, the length of the sheath pipe 1 and the guide pipe 12, the attachment position of the branching tool 39, and the length of the branch pipe sheath pipe 37 are determined. Assemble things. During assembly, the guide pipe 12 is provided with a communication hole 40 at a position corresponding to each branch pipe port 38, and the branch communication cable 21 is taken out from the communication hole 40 and branched from the guide pipe 12 via the branch tool 39. The inside of the branched branch tube 37 is inserted. At this time, the above-described caller 42 is provided at the tip of the branch pipe sheath pipe 37.

  The sheath tube 1 prepared by the above preparation work and the assembled guide tube 12 are wound around a reel drum or the like and carried into the construction site. In addition, when introducing the branch pipe sheath pipe 37, the mentor 42, etc., when moving in the main pipe 5, the pipe 5 may be damaged by friction with the inner wall of the main pipe 5, or may be caught by a step in the existing pipe line. Since there is a fear, the branch pipe sheath pipe 37 and the like are bundled and moved on a cart or a simple ship that can move in the main pipe 5 and can be drawn into the main pipe 5 at the same time as the traction measures described later. preferable.

  At the construction site, first, a traction measure is routed between the human holes 9 and 10. As a method of passing the towing measure between the human holes 9 and 10, a method of pushing a rigid body such as a wire, a method of blowing off a parachute-like connecting tool with air pressure, a method of connecting to a self-propelled in-pipe mobile vehicle A known method such as the above can be appropriately employed. Here, the tension device 22 and the tension mechanism 45 are attached to the human holes 9 and 10 and the branch pipe rod 43 (see FIG. 11).

  Next, one end of the traction measure and the high strength low elongation material body 4 of the sheath tube 1 are connected to one end portion of the main tube 5, for example, the human hole 9, and the traction measure is taken out from the other human hole 10. The sheath tube 1 is installed in the tube 5. Further, since the sheath tube 1 is integrated with the high-strength low-tensile material body 4, the sheath tube 1 is placed inside the main tube 5 while applying a back tension so that tension is applied to the high-strength low-stretch material body 4. By pulling in, it can be correctly installed in the main pipe 5 without using a twist prevention tool described later.

  Next, one end of the high-strength low elongation material body 4 integrated with the body portion 3 of the sheath tube 1 is wound and fixed by the winding drum 24 of the tension device 22 installed on the inner wall of the human hole 9, The position of the end portion of the sheath tube is adjusted to a predetermined position. Next, the other end of the high-strength and low-tensile material body 4 is wound up from the human hole 10 by the winding drum 24 of the tension device 22 installed on the inner wall of the human hole 10 in the same manner as described above, and the high-strength and low-extension property By applying tension to the material body 4, the sheath tube 1 is fixed at a substantially upper portion of the main tube 5, and the trunk communication cable 6 is inserted into the sheath tube 1. In this way, the main pipe 5 of the existing pipe line can be constructed as an information corresponding pipe. In the case where the guide tube 12 described later is not applied, if the sheath tube 1 installed substantially at the upper portion of the main tube 5 is slack, a member having the same shape as the fixing member 55 as shown in FIG. 9 is used. And it can also be fitted and fixed to the location where the sheath tube 1 is slack.

  Next, a construction method for making the entire existing pipe line including the branch pipe 7 an information-compatible pipe after the main pipe 5 of the existing pipe line is used as an information-compatible pipe will be described below.

  As described above, one end of the traction measure connected to the main pipe 5 and the guide pipe are connected to one end of the main pipe 5, for example, the human hole 9, and the traction measure is taken out from the other human hole 10, A guide tube 12 is installed in the tube 5. At this stage, each of the communication holes 40 provided in the guide pipe 12 is in a state of being substantially coincident with the corresponding branch pipe port 38. When pulling the guide tube 12 from one human hole 9 to the other human hole 10, the guide tube 12 may be twisted. Therefore, even if a twist prevention tool is interposed between the traction measure and the guide tube 12. Good. When the twist prevention tool is used, the guide tube 12 is taken out after being arranged in the main tube 5.

  Next, the branch pipe sheath pipe 37 is drawn into the branch pipe 7. In this work, first, the position of the guide pipe 12 in the main pipe 5 is finely adjusted back and forth so that the ment 42 at the tip of the branch pipe sheath pipe 37 is positioned directly below the branch pipe 7. Then, an arm-shaped gripping jig or the like is inserted from the branch pipe rod 43, and the caller 42 provided at one end of the branch pipe sheath pipe 37 located near the branch pipe port 38 is grasped while checking with a TV camera. Take out from the branch pipe rod 43. Alternatively, the traction measure is routed from the branch pipe rod 43 through the branch pipe 7 and the main pipe 5 to one end of the main pipe 5, for example, the human hole 9, and the branch pipe sheath pipe 37 and the traction measure are connected. It is also possible to install the branch pipe sheath pipe 37 in the branch pipe 7 by continuously pulling up the traction measure from the branch pipe rod 43.

  Next, the guide tube 12 is fitted into the sheath tube 1. FIG. 12 shows an embodiment of the present invention in which the guide tube 12 is fitted to the sheath tube 1. In FIG. 12, one end of the guide pipe 12 (left in the figure) is fitted by hand from inside the human hole 9, and the fitting device 58 is introduced into the main pipe 5. The fitting device 58 moves in the main pipe 5 by pulling the take-up line 59 previously passed through the main pipe 5 from the human hole 10 side. Then, the pressing portion 61 presses the guide tube 12 against the sheath tube 1 by the biasing means 60 provided in the fitting device 58, and the fitting is performed while moving. In addition, even if it is not like the fitting apparatus 58, what kind of thing may be used as long as it can move to the sheath pipe | tube 1 by pressing the guide pipe | tube 12, and can be fitted. For example, the guide tube 12 may be fitted by moving a ball having an outer diameter capable of pressing the sheath tube 1.

  Subsequently, the branch pipe sheath tube 37 is firmly fixed to the upper side of the branch pipe 7 by inserting and tightening the branch pipe sheath pipe 37 disposed up to the branch pipe rod 43 through the tension mechanism 45 in a tensioned state. To do.

  In addition, when it has the curved part from which the angle of the branch pipe 7 changes, it cannot lay the branch pipe sheath pipe 37 along the inner wall upper part in the branch pipe 7 only by applying tension with the tension mechanism 45. In this case, by appropriately installing the fixing member 55 around the branch pipe port 38 and the curved portion in the branch pipe 7, the branch pipe sheath tube 37 is substantially the same as the branch pipe 7 even in the branch pipe 7 having the curved portion. It becomes possible to install along the upper part.

  Further, in order to securely fix the guide tube 12 to the upper part of the inner surface of the main tube 5, it is desirable to install the slack preventing material 50 shown in FIG. 8 at appropriate intervals in the main tube 5 (see FIG. 11).

  As described above, the guide pipe 12 provided with the branch pipe sheath pipe 37 is fitted to the sheath pipe 1 provided substantially at the upper part of the main pipe 5, and the branch communication cable 21 is arranged in parallel inside the guide pipe 12. In addition to wiring, the branch communication cable 21 can be inserted into the branch pipe sheath tube 37 installed substantially at the top of each branch pipe 7 connected to the main pipe 5, and the branch communication cable 21 to the branch pipe rod 43. Can be laid and led to each home 8.

  When the call line 41 is used instead of the branch communication cable 21, the call line 41 and the branch communication cable 21 are finally replaced to complete the construction according to the method for constructing the information corresponding pipe according to the present invention. As a result, until the final process is reached, the call wire 41 is inserted into the space portion 14 of the guide tube 12 and the sheath tube 37 for the branch tube. It will not be damaged and construction stability can be increased.

  Incidentally, in replacing the call line 41 and the branch communication cable 21, first, the branch communication cable 21 is connected to one end of the call line 41. As a connection method, a metal ring or the like may be used for the connection, and if the coating of the branch communication cable 21 and the material of the nominal line 41 are made of plastic and the nominal line 41 is in a tube shape, the nominal number is determined. The tip of the branch communication cable 21 is inserted into the wire 41 for an appropriate length to form an overlap portion, and the overlap portion is crimped from the outer surface by thermocompression or dielectric to crush while melting the plastic of the overlap portion. A shape that does not occur is also possible. By setting the nominal wire 41 and the branch communication cable 21 to have substantially the same outer diameter, when the branch communication cable 21 is pulled in, an excessive pulling force acts on the stepped portion and the like, causing stress concentration, and the branch communication cable 21 is disconnected. Can be prevented. In addition, the connection method of such a call line 41 and the branch communication cable 21 is not specifically limited, It can apply also when it connects by another method using another call line.

  As described above, the existing pipe line including the branch pipe 7 connected to the main pipe can be constructed as the information corresponding pipe.

FIG. 2 is a cross-sectional view of a sheath tube that is a construction member of an information-compatible tube according to the present invention, (a) showing this embodiment, and (b) to (h) showing other embodiments. It is a thing. It is a perspective view of the sheath pipe of this embodiment. It is explanatory drawing of the tension apparatus which concerns on the example of this Embodiment. The tension device according to the present embodiment is shown, in which (a) is a cross-sectional view taken along line AA in FIG. 3, and (b) is a schematic enlarged cross-sectional view of a portion B in FIG. It is a schematic sectional drawing of the guide tube which concerns on the example of this Embodiment. It is explanatory drawing of the state which the guide tube fitted to the sheath tube which concerns on the example of this Embodiment. It is a perspective view of the guide pipe | tube provided with the sheath pipe for branch pipes which concerns on the example of this Embodiment. It is a perspective view of the slack prevention material used in the construction structure thru / or construction method of the information correspondence pipe concerning this embodiment. It is a perspective view of the fixing member used in the construction structure thru / or construction method of the information correspondence pipe concerning this embodiment. It is a figure which shows the construction | structure structure which uses the existing pipe line which concerns on the example of this embodiment as an information corresponding pipe. It is a figure which shows the construction | structure structure which uses the existing pipe line which concerns on the example of this embodiment as an information corresponding pipe. It is a figure explaining 1 process of the construction method of the information corresponding pipe | tube which concerns on this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shell pipe 2 Space part 3 Main-body part 4 High-strength low-tensile-strength material body 5 Main pipe 6 Communication cable (trunk communication cable)
7 Branch pipe 9, 10-hole 12 Guide pipe 14 Space part 21 Branch communication cable 37 Branch pipe sheath pipe 43 Branch pipe rod

Claims (5)

A main body portion in which a space for inserting a communication cable is formed, and a yarn having a high strength and low elongation characteristic that is provided integrally with the main body portion along the length direction of the main body portion. A high-strength low-stretch material body comprising a belt-like fabric used in the vertical direction, and a high-strength low-stretch material body inserted through an existing duct through a human hole. Is fixed by applying tension to the inner wall of the human hole, and the sheath pipe is fixed to substantially the upper part of the existing pipe line ,
A guide tube in which a fitting portion that can be fitted to the outer surface of the sheath tube and one or more space portions into which a communication cable can be inserted is formed after the sheath tube is fixed to a substantially upper portion of the existing pipeline. Is inserted into the existing pipe, the fitting portion is fitted to the outer surface of the sheath pipe, the guide pipe is installed in the existing pipe, and the weight of the guide pipe is reduced to the high strength and low An information-compatible tube construction method that bears on the extensible material body . It has a hole portion through which the high-strength low-stretch material body penetrated in the radial direction, and the high-strength low-stretch material body passed through the hole portion by being rotated is rolled up, so that the high-strength low-stretch material body Using a tension device including a winding drum that becomes non-rotatable by attaching a stopper having a through-hole that matches the outer shape of one end after the elastic material body is wound into the through-hole so that the one end is fitted into the through-hole. The information corresponding pipe construction method according to claim 1, wherein the sheath pipe is fixed to a substantially upper part of the existing pipe line. For pulling the branch pipe sheath tube is inserted through the branch communication cable or called line internal, a member forming the pull exerted shape or gripped by a jig or hooking jig grasping inserted from the branch pipe basins together with the branching sleeve pipe with the whistle at an end thereof is attached through a branch member in the outer surface of the guide tube, and fixing the guide tube fitted to the sleeve pipe, the branch pipe basins The information corresponding pipe construction method according to claim 1 or 2 , wherein the caller is taken out of the pipe and the sheath pipe for the branch pipe is installed in the branch pipe. A main body portion in which a space for inserting a communication cable is formed, and a yarn having a high strength and low elongation characteristic that is provided integrally with the main body portion along the length direction of the main body portion. A high strength and low elongation material body made of a belt-like fabric used in the vertical direction, and a tension tube installed in a manhole of an existing pipe line in the high strength and low elongation material body tension is applied is fixed nearly top of the existing conduit by the device, it is branched from the communication cable to be inserted into the space portion of the sleeve pipe at the branch connection box that is installed in front Symbol manhole branch wherein the weight of the guide tube having a fittable fitting portion to the outer surface of one or more spaces through which the communication cable with the sheath tube so as to bear on the high-strength low-elongation material body fitting engaging portion is fitted to the outer surface of the sheath tube, empty the sheath tube Parts wherein the communication cable is the incoming lines to the guide tube the branch communication cable information corresponding tube constructed structure of the existing pipeline that is incoming to the space portion of the. Wherein the guide tube, for pulling the branch pipe sheath tube is inserted through the branch communication cable or called line internal, hook or gripped by a jig or hooking jig grasping inserted from the branch pipe basins 5. The information-corresponding pipe of the existing pipe line according to claim 4 , wherein the branching sheath pipe provided with a nick, which is a member having a shape, is attached to the outer surface of the guide pipe via a branching tool. Construction structure.

Images