JP2008118786A - Cable-protective pipe member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly reliable cable-protective pipe member securing a space for accommodating a new cable. <P>SOLUTION: The cable-protective pipe member 10 includes an outer wall 12 and is inserted into the existing tube 50 wherein a cable 52 is laid to form a cable-protective pipeline inside the existing tube 50. The outer plane of the outer wall 12 formed along the inside plane of the existing tube 50 and first pipeline parts 14a, 14b are preliminarily formed on the inside plane of the outer wall 12. The existing cable 52 is accommodated in a second pipeline part 16, the second pipeline part 16 is formed using at least a part of the pipe walls of the first pipeline parts 14a, 14b. The second pipeline part 16 can be opened along the full length in the pipe axis direction before being inserted into the existing tube 50, to accomodate the existing cable 52 through the opening. The opening is water-tightly closed with adhesive bonding after the storage of the cable 52, and then the cable-protective pipe member 10 is inserted into the existing tube 50. Thus, materials formed in a factory is used and highly reliable cable-protective pipeline can be formed inside the existing pipe to secure the space for accommodating a new cable separately from the pipeline protecting the existing cable. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cable protection tube member, and more particularly to a cable protection tube member inserted into an existing tube in which a cable is laid.

An example of background art is disclosed in Patent Document 1. The technology of Patent Document 1 is a cable-installed protection tube repairing method in which a protection tube in which a cable is installed is repaired with a lining sheet. The lining sheet has a three-layer structure in which a resin-adsorbing inner layer obtained by impregnating a felt with a curable resin is sandwiched between impermeable films. The existing cable is wrapped in an airtight state by this lining sheet, and the lining sheet is inflated by injecting air into the inside of the cable, thereby closely contacting the inside of the protective tube. And in this state, hot air etc. are sent, the curable resin contained in a lining sheet is chemically reacted, and it hardens | cures the inside of a protective tube.
JP 2006-15704 A [B29C 63/30]

  In the technique of Patent Document 1, not only complicated work at the construction site is required, but also the reaction conditions of the curable resin change depending on the environment, etc., so that the curable resin contained in the lining sheet is uncured part. Variations in quality occur, such as remaining.

  Therefore, a main object of the present invention is to provide a cable protection tube member that is highly reliable and can secure a new cable accommodation space.

  The invention of claim 1 is a cable protection tube member to be inserted into an existing pipe in which a cable is laid, and the outer surface is an outer wall along the inner surface of the existing pipe, and the inner wall side of the outer wall is formed by a tube wall integral with the outer wall. It is a cable protection pipe member provided with the 1st pipe line part formed, and the 2nd pipe line part which is formed by using a pipe wall as at least a part, and accommodates a cable.

  In the first aspect of the present invention, the cable protection tube member (10: reference number corresponding to the embodiment; the same applies hereinafter) is formed of a synthetic resin such as polyethylene or polyvinyl chloride, and the cable (52) is laid therein. The cable is inserted into the existing pipe (50) to form a cable protection conduit inside the existing pipe. The outer surface of the outer wall (12) is along the inner surface of the existing pipe, and on the inner surface side of the outer wall, the first pipe line portion (14) is formed by tube walls (20, 20a, 20b, 20c) formed integrally with the outer wall. , 14a, 14b, 14c). The second pipe section (16) is formed by using at least a pipe wall forming the first pipe section, and a cable laid in an existing pipe is accommodated in the second pipe section. The The second duct portion can be opened, for example, before being inserted into an existing pipe, and an existing cable is accommodated from the openings (24, 26). After the cable is accommodated, the opening is closed watertight by adhesive bonding or the like, and the cable protection tube member is inserted into the existing tube.

  According to the first aspect of the present invention, since it is not necessary to perform complicated work at the construction site and it is not affected by the environment at the site, a high-quality cable protection conduit can be provided inside the existing pipe.

  Moreover, since it has the 1st pipe line part which can lay a new cable separately from the 2nd pipe line part in which the existing cable is accommodated and protected, the surplus space in the existing pipe is used as a new cable accommodation space. Available.

  The invention of claim 2 is dependent on the invention of claim 1, and at least two independent first pipe parts are formed by at least two pipe walls, and the second pipe part has at least two pipe walls and an outer wall. Formed by.

  In the invention of claim 2, at least two independent first pipe sections (14a, 14b, 14c) are formed by at least two pipe walls (20a, 20b, 20c) formed integrally with the outer wall (12). Each is formed on the inner surface side of the outer wall. The second pipe part (16) is formed by at least two pipe walls and an outer wall that respectively form the first pipe part.

  According to invention of Claim 2, since it has at least 2 independent 1st pipe line part, the surplus space in an existing pipe | tube can be utilized more efficiently.

  The invention of claim 3 is dependent on the invention of claim 1 or 2, and further includes a partition member that is formed integrally with the outer wall and partitions the second pipe portion.

  In invention of Claim 3, a partition member (28) is further provided. The partition member is formed integrally with the outer wall on the inner surface side of the outer wall (12), and the inside of the second pipe line portion (16) is partitioned and divided by the partition member. As a result, a new space (32) is created in the second pipeline section in addition to the space for housing the existing cable (52), so that a new cable can be accommodated in the second pipeline section. The surplus space in the existing pipe can be used efficiently.

  The invention of claim 4 is dependent on the invention of claim 1, further comprising a sealing member for sealing the tube wall, and the second pipe line portion is formed by the sealing member and the tube wall.

  In invention of Claim 4, the sealing member (34) which seals a pipe wall (20) is further provided. A 2nd pipe line part (16) is formed of a sealing member and a pipe wall. For example, the second pipe part is formed by opening the pipe wall forming the first pipe part (14) before being inserted into the existing pipe (50), and this opening (26 ), The existing cable (52) is inserted. The opening is closed in a watertight manner by joining a sealing member, and the cable protection tube member (10) is inserted into the existing tube. Thus, the function similar to that of the invention of claim 1 is exhibited.

  According to the present invention, since the material molded at the factory is used, a highly reliable cable protection conduit can be provided inside the existing pipe, and a new cable can be accommodated separately from the existing cable accommodating space. Space can be secured.

  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.

  Referring to FIG. 1, a cable protection tube member 10 according to an embodiment of the present invention is made of a synthetic resin such as polyethylene or polyvinyl chloride, and is formed by extrusion, as shown in FIG. The cable 52 is inserted into the existing pipe 50 laid to form a cable protection conduit inside the existing pipe 50.

  As shown in FIGS. 1 to 4, the outer wall 12 is formed in a cylindrical shape, and the outer surface of the outer wall 12 faces the inner surface of the existing tube 50 when the cable protection tube member 10 is inserted into the existing tube 50. For example, the outer diameter of the outer wall 12 is set to be substantially the same as or smaller than the inner diameter of the existing pipe 50. When the outer diameter of the outer wall 12 is formed smaller than the inner diameter of the existing pipe 50, the cable protection pipe member 10 can be easily inserted into the existing pipe 50.

  The outer wall 12 is provided with an open end 18 over the entire length in the tube axis direction. As shown in FIG. 3, the open ends 18 can be separated from each other, that is, can be opened and closed. Moreover, in the state where the open end 18 is closed, the cross-sectional shape of the outer wall 12 is circular. The thickness of the outer wall 12 is 3-4 mm, for example. For this reason, the outer wall 12 has some flexibility, and the opening end 18 can be opened and closed without damaging the outer wall 12. On the inner surface side of the outer wall 12, for example, two first pipe sections 14, that is, a first pipe section 14a and a first pipe section 14b are formed in advance.

  The first conduit portion 14 is formed over the entire length of the outer wall 12 in the tube axis direction by integrally providing the tube wall 20, that is, the tube wall 20 a and the tube wall 20 b, on the inner surface side of the outer wall 12. . The cross section of the first pipe section 14 is formed in a fan shape by the outer wall 12 having an arcuate cross section and the pipe wall 20 having a “<” shape in cross section. That is, the tube wall of the arc portion of the first conduit portion 14 is also a part of the outer wall 12. For example, the thickness of the tube wall 20 is 1-2 mm, and the central angle of the fan shape is 120 °. The first conduit portions 14a and 14b are adjacent to each other in a state where the opening end 18 is closed, and the side surface portion 22a of the tube wall 20a and the side surface portion 22b of the tube wall 20b are portions that are in contact with each other at this time.

  The 2nd pipe line part 16 is formed over the full length of the pipe axis direction of the outer wall 12 by using the outer wall 12 and the pipe wall 20, and the cross-sectional shape is a fan shape. In other words, the tube wall of the arc portion of the second conduit portion is also a part of the outer wall 12, and the tube wall of the “<” shape is also a part of the tube walls 20a and 20b. As shown in FIG. 3, the second conduit portion 16 can be opened, and when the opening end 18 of the outer wall 12 is opened, an opening 24 of the second conduit portion 16 is generated. Further, when the cable protection tube member 10 is inserted into the existing pipe 50, the second pipe line portion 16 is used as a storage space for the existing cable 52 and protects the existing cable 52.

  When a cable protection pipe line is formed in the existing pipe 50 by the cable protection pipe member 10, first, a drum 56 around which the cable protection pipe member 10 is wound is prepared near the existing pipe 50 as shown in FIG. 5.

  The existing pipe 50 is, for example, a cast iron pipe buried in the soil, and the pipe diameter is 70-90 mm. Manholes 66a and 66b are formed at both ends of the existing pipe 50, and openings 68a and 68b are formed above the manholes 66a and 66b, respectively. Further, a cable 52 such as a communication line or a power line is laid in advance inside the existing pipe 50.

  A drum 56 around which the cable protection tube member 10 is wound is installed on the ground portion of the opening 68a of the manhole 66a, and a pulling rope 58 is connected to the tip of the cable protection tube member 10.

  Next, the rope 58 for towing is passed from the insertion port 60 which is the end of the existing pipe 50 on the manhole 66a side to the outlet 62 which is the end of the manhole 66b, and the rope 58 is pulled from the outlet 62 side. Thus, the cable protection tube member 10 is pulled into the manhole 50a. When the end of the cable protection tube member 10 is drawn to the vicinity of the insertion port 60 of the existing pipe 50, the existing cable 52 is inserted from the opening 24 inside the manhole 66a, and the cable 52 is accommodated in the second pipe line section 16. . After the cable 52 is accommodated, the opening 24 is watertightly closed by bonding the side portions 22a and 22b. However, when the cable protection tube member 10 is made of polyethylene, the side portions 22a and 22b can be heat-sealed. Thereafter, the cable protection tube member 10 is inserted into the existing tube 50 from the insertion port 60 so that the cable protection tube member 10 is not twisted. Further, at the same time when the cable protection tube member 10 is inserted, the cable 52 is continuously accommodated in the second duct portion 16 and the side surfaces 22a and 22b are bonded and bonded. Then, when the end portion of the cable protection tube member 10 reaches the outlet 62 and the cable protection tube member 10 forms the cable protection pipeline in the entire inside of the existing tube 50, the rope 58 is removed and the operation is finished.

  The cable protection tube member 10 is inserted into the existing pipe 50 by pulling the rope 58 from the pull-out port 62 side. However, instead of pulling by the rope 58 or with pulling, the cable protection pipe member 10 is pushed from the insertion port 60 side. Thus, the cable protection tube member 10 can be inserted into the existing tube 50.

  Further, when the cable protection tube member 10 is drawn into the manhole 66a, the cable protection tube 10 is relatively high on the ground 64 with respect to the cable protection tube member 10 (however, considering the heat resistance of the cable protection tube 10). Steam at a temperature that does not cause deformation may be applied. Thereby, the flexibility of the cable protection tube member 10 is increased, so that the workability is improved.

  Thus, since the cable protection tube member 10 is preliminarily molded from a synthetic resin such as polyethylene or polyvinyl chloride, the side wall portions 22 of the tube wall 20 are bonded and bonded to each other in the existing tube 50 at the construction site. A cable protection conduit can be formed simply by insertion. That is, it is not necessary to perform complicated operations such as curing the outer wall 12 and the like by chemically reacting at the work site. Therefore, a cable protection conduit that is not affected by the environment of the construction site and has no variation in quality, that is, high reliability, can be formed inside the existing pipe 50.

  In addition, a plurality of, in this embodiment, three conduit portions 14a, 14b, and 16 are provided inside the outer wall 12, and a new cable other than the cable 52 is accommodated by accommodating the existing cable 52 in the second conduit portion 16. The first pipe line portion 14 can be used as a new pipe line into which the pipe can be inserted. That is, a new cable storage space can be secured separately from the existing cable 52 storage space.

  Furthermore, by having the tube wall 20, the tube wall 20 is in a state of supporting the outer wall 12 from the inner surface side, and the flat rigidity against the external pressure of the cable protection tube member 10 is increased. Therefore, the cable protection pipe formed by the cable protection pipe member 10 can be used as a self-standing pipe that does not depend on the strength of the existing pipe 50.

  In the cable protection tube member 10 shown in FIG. 1, the two first conduit portions 14 are provided in advance, but according to the outer diameter or the like of the existing cable 52, that is, the size of the extra space in the existing tube 50. Depending on the above, the number of the first conduit portions 14 can be changed as appropriate.

  For example, as shown in FIGS. 6 and 7, one first conduit section 14 can be provided in advance. In this case, for example, the first pipe line portion 14 is formed by the outer wall 12 and the pipe wall 20 having a straight section. Further, the second pipe line portion 16 is formed by the outer wall 12 and the pipe wall 20. The tube wall 20 is separable from, for example, the vicinity of the central portion thereof, and the side surface portions 22 of the separated tube wall 20 are in contact with each other with the open end 18 closed. Therefore, the opening 24 is watertightly closed by adhesively bonding the side surface portions 22 of the tube wall 20 to each other. As a result, the space inside the first pipeline portion 14 and the second pipeline portion 16, that is, the accommodation space for the existing cable 52 and the new cable is increased, and a cable having a large outer diameter can be accommodated. In addition, in the cable protection tube member 10 shown in FIG. 6, in order to enlarge the area (joining area) of a junction part, it was set as the structure which divides | segments a part of the pipe wall 20, but it is not limited to this, The thickness of one end of the outer wall 12 is increased toward the opening end 18 (for example, the thickness is about 1 cm), and the one end and the tube wall 20 (in other words, the other end of the outer wall 12) are joined. You can also.

  Further, for example, as shown in FIGS. 8 and 9, three first conduit portions 14, that is, first conduit portions 14a, 14b, and 14c may be provided in advance. In this case, the second pipe portion 16 is formed by the outer wall 12, the pipe wall 20b of the first pipe portion 14b, and the pipe wall 20c of the first pipe portion 14c, and the side wall portion 22a of the pipe wall 20a and the pipe wall 20b are formed. The opening 24 is watertightly closed by adhesive bonding or the like with the side surface portion 22b. As a result, in addition to the cable protection conduit that protects the existing cable 52, three new conduits can be provided inside the existing tube 50, and a new cable accommodation space can be secured more efficiently. Moreover, since the outer wall 12 is supported from the inner surface side in the vertical direction by the tube walls 20a and 20c, the flat rigidity of the cable protection tube member 10 in the vertical direction becomes higher.

  A cable protection tube member 10 according to another embodiment of the present invention shown in FIGS. 10 to 13 includes a partition member 28. Like the cable protection tube member 10 shown in FIG. Form a conduit. In addition, the same number is attached | subjected about the part which is common in the cable protection tube member 10 shown in FIG. 1, and the overlapping description is abbreviate | omitted.

  The outer wall 12 is formed into a cylindrical shape having a substantially heart-shaped cross section by the arc-shaped portions 12a, 12b and 12c. The outer surface of the arc-shaped portion 12c faces the inner surface of the existing pipe 50, and first pipe portions 14a and 14b are formed on the inner surface sides of both ends. The arcuate portions 12a and 12b are part of the outer wall 12 and part of the tube walls of the first conduit portions 14a and 14b. The adjacent end portions of the arc-shaped portions 12a and 12b are separable from each other, that is, the open end 30 that can be opened and closed.

  The 1st pipe line part 14 is formed in the inner surface side of the outer wall 12, and the cross section is circular cylindrical shape. The first conduit portions 14a and 14b are adjacent to each other with the open end 30 closed, and the side surface portion 22a of the first conduit portion 14a and the side surface portion 22b of the first conduit portion 14b are in contact with each other at this time. Part. In addition, the thickness of the pipe wall of the outer wall 12 and the 1st pipe line part 14 is 3-4 mm, for example.

  The second duct portion 16 is formed by using the outer wall 12 and the duct walls of the first duct portion 14. That is, the pipe wall of the second pipe line part 16 is also a part of the outer wall 12 and a part of the pipe wall of the first pipe line part 14. In addition, a plate-like partition member 28 is formed inside the second pipe line portion 16. The partition member 28 is formed on the inner surface side of the arc-shaped portion (outer wall) 12c over the entire length in the tube axis direction, and the thickness thereof is, for example, 1-2 mm.

  Moreover, the 2nd pipe line part 16 is used as an accommodation space of the existing cable 52 similarly to the cable protection pipe member 10 shown in FIG. As shown in FIG. 12, the second conduit portion 16 can be opened, and opening the opening end 30 of the outer wall 12 creates an opening 24 of the second conduit portion 16. A cable 52 is inserted from the opening 24. After the cable 52 is accommodated, the opening 24 is watertightly closed by adhesively joining the side surface portions 22a and 22b, and the cable protection tube member 10 is inserted into the existing tube 50. However, since the cross sections of the first pipe portions 14a and 14b are circular, the area of the side surface portions 22a and 22b, which is a bonding portion, that is, the bonding area is reduced. Therefore, when the side surface portions 22a and 22b are bonded, In consideration of the bonding strength, the first pipe portions 14a and 14b may be slightly flattened to increase the bonding area.

  In this manner, as in the embodiment shown in FIG. 1, a highly reliable cable protection conduit can be constructed inside the existing pipe 50 without performing complicated work at the construction site, and a new cable can be accommodated. Space can be secured.

  Moreover, a new cable can be smoothly inserted by making the 1st pipe line parts 14a and 14b cylindrical.

  Further, by providing the partition member 28, the inside of the second pipe line portion 16 is divided and a new space 32 is generated, so that a new cable can be accommodated in the space 32, and the surplus in the existing pipe can be more efficiently accommodated. Space available.

  In the cable protection tube member 10 shown in FIG. 10, a space is provided between the partition member 28 and the first conduit portion 14, but as shown in FIGS. 14 and 15, the end portion of the partition member 28 is You may make it fit between 1st pipe line parts 14a and 14b. In this case, after accommodating the existing cable 52, the end portion of the partition member 28, the side surface portion 22a, and the side surface portion 22b are joined in a watertight manner by bonding or the like. As a result, the flat rigidity of the cable protection tube member 10 is increased.

  Further, although one partition member 28 is provided, the partition member 28 may not be provided, or a plurality of partition members 28 may be provided. When the partition member 28 is not provided, the space inside the second pipe line portion 16, that is, the space for accommodating the existing cable 52 becomes large, and the existing cable 52 having a large outer diameter can be accommodated. On the other hand, when a plurality of partition members 28 are provided, a plurality of new spaces 32 are generated, so that a larger number of new cables can be accommodated.

  For example, when a plurality of partition members 28 are provided, as shown in FIGS. 16 and 17, two partition members 28 having a circular cross section are provided symmetrically on the inner surface side of the central portion of the arc-shaped portion 12 c. You may do it. In this case, for example, after the existing cable 52 is accommodated between the two partition members 28, the side wall portion 22a of the tube wall of the first pipeline portion 14a and the side wall portion 22b of the tube wall of the first pipeline portion 14b. And each of the edge part of the partition member 28 is watertightly joined by adhesion | attachment etc. However, only the side portions 22a and 22b may be joined. As a result, the two partition members 28, the arc-shaped portion 12a and the arc-shaped portion 12b support the outer wall 12 from the inner surface, and the flat rigidity of the cable protection tube member 10 becomes higher.

  Further, the outer wall 12 is formed by the arc-shaped portions 12a, 12b and 12c, and the cross section of the outer wall 12 is formed in a substantially heart shape. However, as shown in FIGS. 18 and 19, the outer walls are formed by the arc-shaped portions 12c, 12d and 12e. 12 may be formed, and the cross section of the outer wall 12 may be formed in a circular shape. The arcuate parts 12d and 12e are formed on both circumferential edges of the arcuate part 12c, respectively, and form a cylindrical shape together with the arcuate part 12c. The adjacent end portions of the arcuate portions 12d and 12e are separable from each other, that is, an open end 30a that can be opened and closed. In addition, cylindrical first conduit portions 14 a and 14 b are formed on the inner surface side of the outer wall 12. In this case, after the existing cable 52 is accommodated in the second pipe line portion 16, the ends of the arc-shaped portions 12d and 12e are joined in a watertight manner by bonding or the like. However, the thickness of the outer wall 12 is about 3-4 mm. If the ends of the arcuate portions 12d and 12e are joined as they are, the joining area is small and the joining strength may be weakened. Therefore, considering the bonding strength, for example, as shown in FIGS. 18 and 19, the arc-shaped portions 12d and 12e are made thicker toward the opening end 30a (for example, the thickness of each end is about 1 cm). The bonding area may be increased. Further, each end portion of the arc-shaped portions 12d and 12e is bent in a “<” shape toward the inner surface side, and the portions bent toward the inner surface side are adhesively bonded to increase the bonding area. You may do it. Furthermore, the end of the arcuate part 12d and the end of the arcuate part 12e may be overlapped by about 1 cm, and the contact area may be adhesively joined to increase the joining area.

  A cable protection pipe member 10 according to another embodiment of the present invention shown in FIGS. 20 to 23 includes an outer wall 12 and a sealing member 34, and the cable protection pipe line is formed by joining the outer wall 12 and the sealing member 34. Form. In addition, the same number is attached | subjected about the part which is common in the cable protection tube member 10 shown in FIG. 1, and the overlapping description is abbreviate | omitted.

  The outer wall 12 is formed in an arc shape in cross section, and the outer surface thereof faces the inner surface of the existing tube 50 when the cable protection tube member 10 is inserted into the existing tube 50. A connecting portion 36 is formed on each side edge of the outer wall 12 in the circumferential direction, and a tube wall 20 having a U-shaped cross section is formed so as to connect the two connecting portions 36. By the outer wall 12 and the pipe wall 20, the first pipe line portion 14 is formed on the inner surface side of the outer wall 12. Further, a groove 38 is formed by the connecting portion 36, and a projection 40 having a substantially sawtooth cross section is formed continuously along the groove 38.

  The sealing member 34 includes an arc-shaped portion 42 having an arc-shaped cross section, and the outer surface thereof faces the inner surface of the existing tube 50 when the cable protection tube member 10 is inserted into the existing tube 50. On the inner surface side of both end portions of the arc-shaped portion 42, a sandwiching portion 44 and a protrusion 46 are provided symmetrically. The sandwiching portion 44 is bent in a “<” shape in cross section. A protrusion 48 having a substantially saw-shaped cross section is formed on the protrusion 46. The clamping part 44 and the protrusion 46 are continuously formed along the entire length of the arcuate part 42. A sealing material such as water-stopping rubber is attached between the sandwiching portion 44 provided on the sealing member 42 and the protrusion 46. In addition, the thickness of the outer wall 12, the tube wall 20, and the circular arc-shaped part 42 is 3-4 mm, for example.

  The 2nd pipe line part 16 is formed of the pipe wall 20 and the sealing member 34, and the cross section is substantially elliptical. That is, the pipe wall 20 is a part of the pipe wall of the second pipe part 16 and a part of the pipe wall of the first pipe part. Further, the sealing member 34 is a part of the pipe wall of the second pipe line portion 16 and a part of the outer wall 12.

  Moreover, the 2nd pipe line part 16 is used as an accommodation space of the existing cable 52 similarly to the cable protection pipe member 10 shown in FIG. As described above, since the tube wall 20 has a U-shaped cross section, the second pipe line portion 16 is opened before the sealing member 34 is joined, and the cable 52 is connected from the opening 26. Inserted.

  When forming the cable protection conduit, the existing cable 52 is accommodated from the opening 26 and the outer wall 12 and the sealing member 34 are joined. By fitting the protrusion 46 into the groove 38, the protrusion 48 of the protrusion 46 and the protrusion 40 of the connecting portion 36 are engaged, and the sandwiching portion 44 and the protrusion 46 of the sealing member 34 cooperate to connect to each other. The end portion of the portion 36 is clamped, and the end portion of the connecting portion 36 is crimped to the sealing material attached to the sealing member 42. As a result, the sealing member 34 and the connecting portion 36 are joined in a watertight manner. As in the embodiment shown in FIG. 1, the cable protection pipe member 10 is inserted into the existing pipe 50, thereby forming a cable protection pipe line in the existing pipe 50. However, since the cable protection tube member 10 shown in FIG. 20 forms the cable protection conduit by joining the outer wall 12 and the sealing member 34, the outer wall 12 and the sealing member 34 are respectively connected to different drums 56. It may be wound and installed on the ground part and drawn into the manhole 66a.

  Thus, like the embodiment shown in FIG. 1, a highly reliable protective conduit can be constructed inside the existing pipe 50 without performing complicated work at the construction site, and a new cable storage space can be obtained. Can be secured.

  Further, by having the tube wall 20, the flat rigidity of the cable protection tube member 10 is increased, and the cable protection conduit can be used as a self-supporting tube that does not depend on the strength of the existing tube 50.

  In the embodiment shown in FIG. 1, the second conduit portion is opened downward, in the embodiment shown in FIG. 10, the second conduit portion is opened upward, and in the embodiment shown in FIG. Although the two pipe sections are opened in the horizontal direction, the present invention is not limited to these, and the direction in which the second pipe section is opened, that is, the direction in which the existing cable 52 is inserted is appropriately changed according to the environment at the site. Is possible. For example, the second pipe line portion 16 of the cable protection tube member 10 shown in FIG. 1 is opened in the lateral direction, the cable 52 is inserted from the lateral direction, and the cable protection tube member 10 is inserted into the existing tube 50. You can also.

It is sectional drawing which shows the cable protection tube member of one Example of this invention. It is a perspective view which shows the cable protection tube member shown in FIG. It is sectional drawing which shows the opening state of the cable protection tube member shown in FIG. It is sectional drawing which shows the state in which the cable protection pipe member shown in FIG. 1 was inserted in the existing pipe. It is a schematic sectional drawing which shows one construction example of the cable protection tube member shown in FIG. It is sectional drawing which shows the cable protection pipe member of the other Example of this invention. It is sectional drawing which shows the opening state of the cable protection tube member shown in FIG. It is sectional drawing which shows the cable protection pipe member of other Example of this invention. It is a perspective view which shows the cable protection tube member shown in FIG. It is sectional drawing which shows the cable protection pipe member of other Example of this invention. It is a perspective view which shows the cable protection tube member shown in FIG. It is sectional drawing which shows the opening state of the cable protection tube member shown in FIG. It is sectional drawing which shows the state by which the cable protection pipe member shown in FIG. 10 was inserted in the existing pipe. It is sectional drawing which shows the cable protection pipe member of other Example of this invention. It is sectional drawing which shows the opening state of the cable protection tube member shown in FIG. It is sectional drawing which shows the cable protection pipe member of other Example of this invention. It is sectional drawing which shows the opening state of the cable protection tube member shown in FIG. It is sectional drawing which shows the cable protection pipe member of other Example of this invention. It is sectional drawing which shows the opening state of the cable protection tube member shown in FIG. It is sectional drawing which shows the cable protection pipe member of other Example of this invention. It is a perspective view which shows the cable protection pipe member shown in FIG. It is sectional drawing which shows the opening state of the cable protection tube member shown in FIG. It is sectional drawing which shows the state in which the cable protection pipe member shown in FIG. 20 was inserted in the existing pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Cable protection pipe member 12, 12a, 12b, 12c, 12d, 12e ... Outer wall 14, 14a, 14b, 14c ... 1st pipe line part 16 ... 2nd pipe line part 18, 30, 30a ... Open end 20, 20a , 20b, 20c ... pipe wall 24, 26 ... opening 28 ... partition member 34 ... sealing member 50 ... existing pipe 52 ... cable

Claims (4)

A cable protection tube member to be inserted into an existing pipe in which a cable is laid,
An outer wall whose outer surface is along the inner surface of the existing pipe,
A first pipe section formed on the inner surface side of the outer wall by a pipe wall integral with the outer wall, and a second pipe formed by using the pipe wall as at least a part thereof and accommodating the cable A cable protection tube member comprising a road portion. At least two independent first conduit portions are formed by at least two of the tube walls;
The cable protection tube member according to claim 1, wherein the second conduit portion is formed by the at least two tube walls and the outer wall.   The cable protection tube member according to claim 1, further comprising a partition member formed integrally with the outer wall and partitioning the second pipe line portion. A sealing member for sealing the tube wall;
The cable protection tube member according to claim 1, wherein the second conduit portion is formed by the sealing member and the tube wall.