JP2011101583A - Cable protecting pipe member and cable protecting pipe channel using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable protecting pipe member capable of making improved the workability at insertion into an existing pipe, and to provide a cable protecting pipe channel that uses the cable protecting pipe member. <P>SOLUTION: The cable protecting pipe member 10 is inserted into the existing pipe 200 with an existing cable 202 installed therein, and the mutual ends of the pipe member in an axial direction are connected with a joint member 42 and constitute a cable protecting pipe channel 100. The cable protecting pipe member includes a body (12) having mutually separable first and second pipe members 14, 16; the first pipe member 14 is formed with a first divided pipe part (32) and the second pipe member 16 is formed with a second divided pipe part (40), wherein the first divided pipe part (32) cooperates with the second divided pipe part (40), to form a first pipe channel part (20) for accommodating the existing cable 202. A first water cut-off member 28 cuts off the water between the first and second pipe members 14, 16 with the first and second pipe members 14, 16 connected together. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cable protection pipe member and a cable protection pipe using the cable protection pipe member, and more particularly to a cable protection pipe member inserted into an existing pipe having a cable laid therein and a cable protection pipe using the same.

  An example of a conventional method for repairing a protective tube with a cable installed therein is disclosed in Patent Document 1. In the protective method for repairing a protective tube with a cable installed in Patent Document 1, after the cable is inserted into the curved inside of the elastic base material curved in the circumferential direction, the ends in the curved direction of the elastic base material are joined together by the joining means. Thus, a tubular repair material (cable protection tube member) is formed. And the tubular repair material of the state which let the cable pass through the inside is inserted in a protection pipe (existing pipe).

An example of a conventional cable protection tube member is disclosed in Patent Document 2. In the cable protection pipe member of Patent Document 2, the first pipe line portion is formed by a pipe wall formed integrally with the outer wall. The second pipe section is formed by using at least a pipe wall that forms the first pipe section, and can be opened before being inserted into an existing pipe, for example, and an existing cable can be accommodated from the opening. Is done. Then, after the cable is accommodated, the cable protection tube member whose opening is watertightly closed by adhesive bonding or the like is inserted into the existing tube.
JP2007-12495A [H02G 1/06] JP 2008-118786 [H02G 9/06]

  In the technique of Patent Document 1, in order to maintain the watertightness between the connected tubular repair materials, the open end portion of the next tubular repair material is connected to the open end portion of the tubular repair material previously inserted into the protective tube. After connecting by means, it is necessary to apply a sealing agent to the open end of the previous tubular repair material and the open end of the next tubular repair material. In other words, the technique of Patent Document 1 requires complicated work at the construction site, and the workability is poor.

  Moreover, in the technique of patent document 2, since one member which opened a part of the circumferential direction is forcibly deformed into a perfectly circular cross section, residual stress is generated in the cable protection tube member. For this reason, in the technique of Patent Document 2, in order to reduce the residual stress, a process such as heating and softening the cable protection tube member is necessary, and the work takes time and effort.

  Therefore, the main object of the present invention is to provide a novel cable protection pipe member and a cable protection pipe using the same.

  Another object of the present invention is to provide a cable protection pipe member and a cable protection pipe using the same, which can improve workability at the time of insertion into an existing pipe.

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

  1st invention is a cable protection tube member inserted in the existing pipe by which the cable was laid inside, Comprising: It forms in the main body and 1st pipe member which have the 1st and 2nd tube member which can be separated from each other Second divided pipe portion, first and second pipe members formed in the first divided pipe portion and the second pipe member and forming a first conduit portion for accommodating the cable in cooperation with the first divided pipe portion At least one of the first and second pipe members and the first pipe member and the first pipe member. It is a cable protection pipe member provided with the 1st water stop material which stops water between the 1st pipe member and the 2nd pipe member in the state where two pipe members joined.

  In the first invention, the cable protection pipe member (10) constitutes the cable protection pipe line (100) by connecting the end portions in the axial direction to the joint member (42). (202) is inserted into the existing pipe (200). The cable protection tube member includes a main body (12) having a first tube member (14) and a second tube member (16) that are separable from each other. The first pipe member is formed with a first divided pipe part (32), the second pipe member is formed with a second divided pipe part (40), and the first pipe member and the second pipe member are joined together. In this state, the first divided pipe part and the second divided pipe part cooperate to form the first pipe line part (20) for accommodating the existing cable. Further, for example, the first pipe member is formed with second pipe parts (22a, 22b) for inserting a new cable other than the existing cable independently of the first pipe part. Further, for example, the first pipe member is provided with a first water stop material (28) made of synthetic rubber or elastomer. The first water stop material contacts the first pipe member and the second pipe member in a state where the first pipe member and the second pipe member are joined, and stops water therebetween.

  According to the first invention, the cable protection tube member can be obtained by simply joining the first tube member and the second tube member without performing troublesome operations such as applying an adhesive or a sealing agent at the construction site. It is possible to maintain the water tightness of the. Therefore, workability at the time of insertion into the existing pipe can be improved.

  The second invention is dependent on the first invention, has a short tube shape as a whole, and constitutes the cable protection conduit by connecting the end portions in the axial direction in a watertight manner.

  In the second invention, the cable protection tube member (10) has a short tube shape, the ends of the cable protection tube member in the axial direction are butted together, and the ends are connected to the joint member (42). The cable protection conduit 100 is configured by using a watertight connection. For this reason, for example, if the cable protection pipe members that are abutted inside the joint member are inclined, the cable protection pipe line can be bent. That is, even if the existing pipe (200) has a curved part, the cable protective pipe can be smoothly inserted into the existing pipe by bending the cable protective pipe according to the curved part.

  A third invention is dependent on the first or second invention, wherein the first and second pipe members include first and second pipe walls separable from each other, and the first divided pipe portion is the first pipe. Formed on the inner surface side of the wall, the second divided tube portion is formed on the inner surface side of the second tube wall, and the second conduit portion is formed on the inner surface side of at least one of the first and second tube walls. In addition, the first water blocking material is provided on both circumferential edges of one of the first and second tube walls, and the first tube wall is joined with the first tube member and the second tube member joined together. And water between the second pipe wall.

  In the third invention, the first pipe member (14) and the second pipe member (16) respectively include a first pipe wall (26) and a second pipe wall (36) that are separable from each other. The dividing pipe portion (32) is formed on the inner surface side of the first tube wall, and the second dividing tube portion (40) is formed on the inner surface side of the second tube wall. Further, the second inner pipe portions (22a, 22b) are formed, for example, between the first divided pipe portion and the first pipe wall. The first water blocking material (28) is provided, for example, on both side edges in the circumferential direction of the first tube wall, and between the circumferential side edge of the first tube wall and the circumferential side edge of the second tube wall. Stop water.

  A fourth invention is dependent on the third invention and has a first fitting portion formed on the inner surface side of the first tube wall, formed on the inner surface side of the second tube wall and fitted with the first fitting portion. The second fitting part that stops the water between the first fitting part and the second fitting part in a state where the second fitting part and the first fitting part and the second fitting part are fitted together. Is further provided.

  In 4th invention, the 1st fitting part (30) is formed in a 1st pipe wall (26), and the 2nd fitting which fits a 1st fitting part in a 2nd pipe wall (36). A joint (38) is formed. Further, for example, the second fitting portion is provided with a second water stop material (34) made of synthetic rubber or elastomer. The second waterstop material is in contact with the first fitting portion and the second fitting portion in a state where the first fitting portion and the second fitting portion are fitted, and stops between them. Water.

  According to the fourth invention, the first pipe member and the second pipe member that are separable from each other are double-stopped by the first water-stopping material and the second water-stopping material. In addition, the watertightness of the cable protection tube member can be maintained.

  A fifth invention is dependent on any one of the second to fourth inventions, and the end surface in the axial direction of the main body is formed in a shape in which the center side protrudes compared to the peripheral side.

  In 5th invention, the end surface of the main body (12) of a cable protection tube member (10) is formed in the shape which the center side protrudes compared with the peripheral side.

  According to the fifth aspect, since the gap is generated between the end surfaces of the main bodies of the adjacent cable protection tube members, the cable protection tube member can be easily tilted. Therefore, it is easy to form a curved cable protection conduit.

  Furthermore, even if the cable protection tube member is tilted, the peripheral edge of the end face of the main body does not contact locally, reducing the risk of damage or deformation of the contact portion of the adjacent cable protection tube member can do.

  A sixth invention is dependent on the fifth invention, and the end surface has an inclined surface that is inclined downward from the center side toward the peripheral side.

  In the sixth invention, an inclined surface (72) inclined at a predetermined angle (θ) is formed on the end surface of the main body (12) of the cable protection tube member (10). The inclined surfaces are downwardly inclined from the center side to the peripheral side of the end surface of the main body, and in the embodiment, a total of three inclined surfaces, one on each open end surface of each pipeline portion (20, 22a, 22b). A surface is formed.

  The seventh invention is dependent on the sixth invention, and the inclination angle of the inclined surface is set according to the bending angle shared by one cable protection pipe member in the cable protection pipe line.

  In the seventh invention, the predetermined angle (θ) of the inclined surface (72) is the bending angle required for the cable protection tube member (10), that is, one cable protection tube member (100) in the cable protection channel (100). 10) is set according to the bending angle shared.

  An eighth invention is dependent on the fifth invention, and the end surface has a stepped surface whose central side rises more than the peripheral side.

  In the eighth aspect of the invention, the end surface of the main body (12) of the cable protection tube member (10) is provided with a step surface in which the center side of the end surface rises from the peripheral side.

  A ninth invention is dependent on any one of the first to eighth inventions, and further includes a movement assisting portion provided on the outer peripheral surface of the main body.

  In the ninth invention, the movement assisting portion (24) is formed on the outer peripheral surface of the main body (12). For example, the movement assisting portion projects annularly from the outer peripheral surface of the outer tube portion (18) over its entire circumference, and its maximum outer diameter is set smaller than the inner diameter of the existing tube (200). For this reason, when inserting a cable protection pipe member in an existing pipe, the area which contacts the inner surface of an existing pipe can be made small, and the frictional force with respect to the movement of a cable protection pipe member can be reduced.

  According to the ninth invention, the insertion resistance when the cable protection pipe is inserted into the existing pipe can be reduced, and even if the inner surface of the existing pipe is uneven, the cable protection pipe Can be smoothly inserted into the existing pipeline.

  A tenth aspect of the invention is dependent on any one of the first to ninth aspects of the invention, and each of the first conduit portion and the second conduit portion is formed in a substantially circular cross section.

  In the tenth invention, each of the first pipeline portion (20) and the second pipeline portion (22a, 22b) is formed in a substantially circular cross section. For this reason, in the 1st pipe line part used as an accommodation space of an existing cable (202), insertion resistance at the time of inserting a cable protection pipe member (10) in an existing pipe (100) can be made small. Further, in the second inner pipe used as a new cable laying space, it is possible to reduce the insertion resistance when the new cable is inserted into the second pipe section.

  An eleventh aspect of the invention is a cable protection pipe line in which any of the cable protection pipe members according to any one of the first to tenth aspects is connected in the axial direction using a joint member, and the joint member is a shaft of the cable protection pipe members adjacent to each other. An elastic member including an end portion in the direction, the elastic member covering the outer peripheral surface of the main body over the entire circumference, and is a cable protection conduit in which the elastic member and the first water stop material are in contact with each other.

  In the eleventh aspect of the invention, the cable protection pipe (100) is formed by abutting the axial ends of the cable protection pipe member (10) and connecting the ends using the joint member (42). Is done. The joint member includes an elastic member (44). The elastic member is formed in a cylindrical shape by synthetic rubber or elastomer, and includes the axial ends of the cable protection tube members (10) adjacent to each other. The elastic member covers the outer peripheral surface of the main body of the cable protection tube member over the entire circumference and contacts the first water blocking material (28). Thereby, water is stopped between the elastic member and the main body of the cable protection tube member, and water is stopped between the elastic member and the first water stop material of the cable protection tube member.

  According to the eleventh aspect of the present invention, the water-tightness of the cable protection pipe line can be maintained over the entire length by simply connecting the end portions in the axial direction of the cable protection pipe member with the joint member.

  Further, for example, if the cable protection pipe members that are abutted inside the joint member are inclined, the cable protection pipe line can be bent. Therefore, even if the existing pipe has a curved portion, the cable protection pipeline can be smoothly inserted into the existing pipe by bending the cable protection pipeline according to the curved portion.

  A twelfth aspect of the present invention is a cable protection pipe line in which any of the cable protection pipe members according to any one of the first to tenth aspects is connected in the axial direction using a joint member, and the joint member is a shaft of cable protection pipe members adjacent to each other. The third water stop material is formed of an elastic member including an end portion in the direction, and a water-absorbing fiber, and covers the outer peripheral surface of the elastic member over the entire circumference and covers the outer peripheral surface of the main body over the entire circumference. A cable protection conduit in which the third water stop material and the first water stop material are in contact with each other.

  In the twelfth invention, the cable protection pipe (100) is formed by abutting the axial ends of the cable protection pipe member (10) and connecting the ends using the joint member (42). Is done. The joint member includes an elastic member (44) and a third water stop material (76). The elastic member includes the axial ends of the cable protection tube members (10) adjacent to each other. The third water stop material is formed, for example, in a sheet shape with water-absorbing fibers, covers the outer peripheral surface of the elastic member over the entire circumference, and the axial direction of the main pipe (12) of the cable protection pipe members adjacent to each other. The outer peripheral surface of the end portion of the cable is covered over the entire periphery, and is further in contact with the first water stop member (28) of the cable protection tube member. Thus, by overlapping the outer peripheral surface of the axial end portion of the main pipe and the outer peripheral surface of the elastic member with the third water stop material, the third water stop material and the main body of the cable protection tube member are disposed. Is stopped, and the space between the third water-stopping material and the first water-stopping material of the cable protection tube member is stopped, and further, the space between the third water-stopping material and the elastic member is stopped.

  According to the twelfth invention, it is possible to improve the water stoppage of the connecting portion between the cable protection tube member and the joint member.

  A thirteenth invention is dependent on the eleventh or twelfth invention, wherein the joint member further includes a short pipe having first and second pieces that cover the outer peripheral surface of the elastic member and are separable from each other. Two first fitting portions formed on the first piece portion, and two fourth fitting portions formed on the second piece portion and fitted on the first fitting portion, in the first direction In the second direction perpendicular to the first direction, the other third fitting portion and the other fourth fitting portion are engaged with each other. Fit together.

  In the thirteenth invention, the joint member (42) includes an elastic member (44) and a short pipe (52) covering the outer peripheral surface of the elastic member. The short pipe has a first piece portion (54) and a second piece portion (56) that are separable from each other, for example, in a substantially half-short cylindrical shape, and the first piece portion includes a third fitting portion. (58a, 58b) are respectively formed, and the fourth fitting portions (60a, 60b) are respectively formed on the second piece portions. A 3rd fitting part (58a) is formed in the one side edge of the circumferential direction of a 1st piece part, and is fitted by the inside of a 4th fitting part (60a) at a perpendicular direction. The third fitting portion (58b) is formed on the other side edge in the circumferential direction of the first piece portion, and is fitted into the fourth fitting portion (60b) in the horizontal direction.

  According to the thirteenth aspect, when the first piece and the second piece are joined, the dimensional tolerance can be absorbed and joined. Therefore, the short tube can be formed in a substantially circular cross section.

  The fourteenth invention is dependent on the eleventh to thirteenth inventions, and a protruding portion that protrudes outward is provided at an end portion in the axial direction of the cable protection tube member, and the protruding portion and the elastic member are locked to each other. .

  In the fourteenth invention, the protrusions (66) are provided on both ends of the cable protection tube member (10) in the axial direction. In the embodiment, the projecting portion protrudes outward from the outer peripheral surface of the wall surface portion (70) functioning as the tube wall of the conduit portion (20, 22a, 22b). Moreover, in an Example, the hollow part (68) is formed in the inner peripheral surface of an elastic member (42) in the position corresponding to the projection part provided in the cable protection pipe member, and it butts inside a joint member. Each protrusion of the cable protection tube member that is provided is fitted into one recess, so that the protrusion and the elastic member are locked together.

  According to the fourteenth aspect of the present invention, even when a detachment force acts between the cable protection tube member and the joint member, the protrusion of the cable protection tube member is locked to the elastic member, so that the cable protection tube member and The movement of the elastic member in the direction away from each other is restricted. Therefore, the cable protection tube member and the joint member are hardly separated.

  According to this invention, between the first pipe member and the second pipe member that are separable from each other is water-stopped by the first water-stop material, so that the workability at the time of inserting the cable protection pipe into the existing pipe is improved. Can be made.

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

It is an illustration figure which shows simply a mode that the cable protection pipe line using the cable protection pipe member of one Example of this invention was formed in the existing pipe | tube. FIG. 2 is an illustrative view schematically showing a cable protection conduit in FIG. 1. It is a top view which shows the cable protection pipe member of FIG. (A) is sectional drawing which shows the cross section of the cable protection tube member in the IVa-IVa line of FIG. 3, (b) is sectional drawing which shows the cross section of the cable protection tube member in the IVb-IVb line of FIG. FIG. 4C is a cross-sectional view showing a cross section of the cable protection tube member taken along line IVc-IVc in FIG. 3, and FIG. 4D is a cross section showing a cross section of the cable protection tube member taken along line IVd-IVd in FIG. FIG. It is sectional drawing which shows the coupling member of FIG. (A) is sectional drawing which shows the cross section of the joint member in the VIa-VIa line of FIG. 5, (b) is sectional drawing which shows the cross section of the joint member in the VIb-VIb line of FIG. It is an illustration figure which shows the 1st water stop material of a cable protection pipe member. It is an illustration figure which shows a mode that the existing cable was accommodated in the cable protection pipe member. It is an illustration figure which shows a mode that a cable protection pipeline is bent. It is an illustration figure which shows the 1st water stop material of the cable protection pipe member of another one Example of this invention. It is an illustration figure which shows typically the cable protection pipe line using the cable protection pipe member of another one Example of this invention. It is sectional drawing which shows the coupling member of FIG. (A) is sectional drawing which shows the cross section of the joint member in the XIIIa-XIIIa line | wire of FIG. 12, (b) is sectional drawing which shows the cross section of the joint member in the XIIIb-XIIIb line | wire of FIG. It is a top view which shows the cable protection pipe member of another Example of this invention. It is sectional drawing which shows the cross section of the cable protection tube member in the XV-XV line | wire of FIG. It is sectional drawing which shows the coupling member which connects the cable protection pipe member of FIG. (A) is sectional drawing which shows the cross section of the joint member in the XVIIa-XVIIa line | wire of FIG. 16, (b) is sectional drawing which shows the cross section of the joint member in the XVIIb-XVIIb line | wire of FIG. It is an illustration figure which shows typically the cable protection pipe line using the cable protection pipe member of another one Example of this invention. It is a top view which shows the cable protection pipe member of FIG. (A) is sectional drawing which shows the cross section of the cable protection tube member in the XXa-XXa line of FIG. 19, (b) is sectional drawing which shows the cross section of the cable protection tube member in the XXb-XXb line of FIG. FIG. 20C is a cross-sectional view showing a cross section of the cable protection tube member taken along the line XXc-XXc of FIG. 19, and FIG. 19D is a cross section showing a cross section of the cable protection tube member taken along the line XXd-XXd of FIG. FIG. It is an illustration figure which shows the edge part of the axial direction of the cable protection pipe member of FIG. It is an illustration figure which shows the inclined surface of the edge part of the axial direction of the cable protection tube member of FIG. It is an illustration figure which shows the inclined surface of the edge part of the axial direction of the cable protection tube member of FIG. It is an illustration figure which shows the 1st water stop material of the cable protection pipe member of FIG. It is sectional drawing which shows the coupling member of FIG. FIG. 26 is a cross-sectional view showing a cross section of the joint member taken along line XXVI-XXVI in FIG. 25. It is sectional drawing which shows the short tube of FIG. 18, (a) is a front view which shows the state which isolate | separated the 1st piece part and the 2nd piece part, (b) is a 1st piece part and 2nd. It is a front view which shows the state which joined the one part. It is an illustration figure which shows the deformation | transformation Example of a coupling member. (A) is sectional drawing which shows the cross section of the joint member in the XXIXa-XXIXa line | wire of FIG. 28, (b) is sectional drawing which shows the cross section of the joint member in the XXIXb-XXIXb line | wire of FIG.

  Referring to FIGS. 1 and 2, a cable protection pipe member 10 according to an embodiment of the present invention forms a cable protection pipe line 100 by connecting end portions in the axial direction to joint members 42. It is inserted into an existing pipe 200 in which an existing cable 202 such as a communication line or a power line is laid.

  The cable protection tube member 10 is made of, for example, a synthetic resin such as polyethylene, polyvinyl chloride, ABS (acrylonitrile, butadiene rubber, styrene), and is formed into a short tube shape by injection molding or the like.

  However, the “short pipe shape” here is not a long pipe body such as a general pipe, for example, a length that is long by connecting a plurality of components in the axial direction. Means the shape of a tube having

  As shown in FIGS. 3 and 4, the cable protection tube member 10 includes a main body 12 having a first tube member 14 and a second tube member 16 that are separable from each other, that is, can be opened and closed. In a state where the member 14 and the second pipe member 16 are joined, the cross-sectional shape of the main body 12 becomes a substantially true circle.

  The main body 12 includes an outer tube portion 18 that functions as a tube wall. The outer tube portion 18 is constituted by a tube wall (a first tube wall 26 described later) of the first tube member 14 and a tube wall (a second tube wall 36 described later) of the second tube member 16, and its axis. The length in the direction is, for example, 230 mm, and the outer diameter is, for example, 72 mm.

  On the inner surface side of the outer pipe part 18, three pipe parts, specifically, one first pipe part 20 and two second pipe parts 22a and 22b are formed. As shown in FIG. 3 and FIG. 4 (a), in this embodiment, the first pipe line part 20 and the second pipe line parts 22a and 22b are arranged at the respective vertices of the cross-sectional triangle, and their open ends. The part is located outside the opening end of the outer tube part 18 (see FIG. 2).

  As will be described in detail later, the first pipe line part 20 is configured by combining the first divided pipe part 32 of the first pipe member 14 and the second divided pipe part 40 of the second pipe member 16. The cross section has a substantially perfect circle shape.

  The first pipe part 20 can be opened, for example, near the center by separating the first pipe member 14 and the second pipe member 16, and the cable protection pipe member 10 is inserted into the existing pipe 200. Is used as a storage space for the existing cable 202. In other words, the first pipe line part 20 that accommodates the existing cable 202 is formed by causing the first divided pipe part 32 of the first pipe member 14 and the second divided pipe part 40 of the second pipe member 16 to cooperate. Is done. The internal diameter of the 1st pipe line part 20 is 35 mm, for example.

  Moreover, as shown in FIG. 3 and FIG. 4B, two second pipe sections 22 a and 22 b are formed between the first pipe section 20 and the pipe wall of the first pipe member 14. . The two second pipe sections 22a and 22b are formed independently of the first pipe section 20, and their cross sections are substantially circular. The second conduit portions 22a and 22b are used as new conduits into which new cables other than the cable 202 can be inserted. For example, the inner diameters of the second pipe portions 22a and 22b are each 28 mm.

  Further, as shown in FIG. 3 and FIG. 4 (c), on the outer peripheral surface of the outer tube portion 18, movement assist portions 24 are formed at both ends in the axial direction of the outer tube portion 18. The movement assisting part 24 protrudes in an annular shape outward in the radial direction over the entire circumference of the outer peripheral surface of the outer pipe part 18, and its maximum outer diameter is set smaller than the inner diameter of the existing pipe 200.

  As shown in FIGS. 3 and 4, the first pipe member 14 includes a first pipe wall 26 having a substantially semicircular cross section, and synthetic rubber or elastomer is provided on both side edges of the first pipe wall 26 in the circumferential direction. The 1st water stop material 28 which consists of etc. is provided. The first water stop material 28 is provided continuously over the entire length along the axial direction of the first pipe member 14, and the first fitting portion 30 and the second fitting are described in detail later. When the joint portion 38 is fitted together, the circumferential side edge of the first tube wall 26 and the circumferential side edge of the second tube wall 36 are brought into contact with each other to stop water therebetween.

  Moreover, the 1st fitting part 30 is each formed in the position inside the 1st water stop material 28 in the circumferential direction both sides edge of the 1st pipe wall 26, respectively. And the 1st division pipe part 32 whose cross section is a semi-cylindrical shape is formed so that the two 1st fitting parts 30 may be tied.

  The first fitting part 30 is a part to be fitted to the second fitting part 38 of the second pipe member 16, which will be described in detail later, and is continuous over the entire length along the axial direction of the first pipe member 14. Formed. The first fitting portion 30 is formed in a hollow shape having a size substantially equal to the protruding second fitting portion 38, for example, and a second waterstop material made of synthetic rubber or elastomer is formed on the bottom surface of the hollow. 34 is provided. The second water stop material 34 is formed in a thin plate shape or a cylindrical shape, and when the first fitting portion 30 and the second fitting portion 38 are fitted together, the first fitting portion 30 and the second fitting portion 34 are fitted. The portion 38 is contacted and water is stopped between them.

  The second pipe member 16 includes a second pipe wall 36 having a substantially semicircular cross section, and second fitting portions 38 are formed on both circumferential edges of the second pipe wall 36, respectively. . And the 2nd division pipe part 40 whose cross section is a semi-cylindrical shape is formed so that the two 2nd fitting parts 38 may be tied.

  The 2nd fitting part 38 is a site | part which fits with the 1st fitting part 30 of the 1st pipe member 14, and is continuously formed over the full length along the axial direction of the 2nd pipe member 16. As shown in FIG. . The second fitting portion 38 is formed in a protruding shape having a size substantially equal to that of the first fitting portion 30 and is fitted into the first fitting portion 30.

  As shown in FIGS. 5 and 6, the joint member 42 includes an elastic member 44 and a short tube 52 that covers the outer peripheral surface of the elastic member 44, and as described above, the axial direction of the cable protection tube member 10. Connect the ends of each other.

  The elastic member 44 is formed in a cylindrical shape from, for example, a synthetic rubber such as water-expanded rubber or SBR (styrene-butadiene-rubber), or an elastomer, and its axial length is, for example, 40 mm.

  As shown in FIGS. 5 and 6 (a), at the substantially central portion of the elastic member 44, the entire outer shape of the pipe sections 20, 22a, 22b of the cable protection pipe member 10, that is, the pipe sections 20, 22a, A through portion 46 is formed which is a space having substantially the same shape as the outer shape of the wall surface portion functioning as the tube wall 22b. The penetrating portion 46 penetrates the elastic member 44 in the axial direction. When the end portions in the axial direction of the cable protection tube member 10 are connected to each other by the joint member 42, the penetrating portion 46 protects adjacent cables. The open ends of the pipe sections 20, 22a, and 22b of the pipe member 10 are included.

  Further, as shown in FIGS. 5 and 6B, both end portions of the elastic member 44 in the axial direction are formed in a cylindrical shape having an inner diameter substantially equal to the outer diameter of the outer tube portion 18 and covered therewith. Part 48 is formed. The covering portion 48 covers the outer peripheral surface of the end portion in the axial direction of the main pipe 12 of the cable protection tube members 10 adjacent to each other over the entire periphery. Further, as shown in FIG. The first water stop member 28 is contacted. As a result, the gap between the covering portion 48 of the elastic member 44 and the outer tube portion 18 of the main body 12 is stopped, and further, the gap between the covering portion 48 and the first water stop material 28 of the cable protection tube member 10 is stopped. Watered.

  Further, as shown in FIG. 6A, a slit 50 extending in the axial direction is formed in a part of the circumferential direction of the elastic member 44, and the elastic member 44 is connected to the cable by opening and closing the slit 50. The protective tube member 10 can be attached and detached.

  The slit 50 may be closed by attaching a double-sided tape (not shown) to the slit 50 after the elastic member 44 includes the end portion of the cable protection tube member 10 in the axial direction. By doing so, the waterstop in the circumferential direction of the elastic member 44 is improved.

  5 and 6, the short tube 52 is made of a synthetic resin such as polyethylene, polyvinyl chloride, ABS (acrylonitrile butadiene rubber styrene), and the length in the axial direction is, for example, 40 mm.

  The short pipe 52 has a first half portion 54 and a second piece portion 56 that are separable from each other, that is, can be opened and closed, and have a substantially half short cylindrical shape. The first piece portion 54 and the second piece portion 56 are connected to each other. By joining and covering the outer peripheral surface of the elastic member 44, the slit 50 of the elastic member 44 is held in a closed state. That is, in this embodiment, the short tube 52 functions as a fastening member that holds the slit 50 of the elastic member 44 in a closed state by fastening the elastic member 44.

  Third fitting portions 58 are respectively formed on both side edges of the first piece portion 54 in the circumferential direction. The third fitting portion 58 is a portion that fits with the fourth fitting portion 60 of the second piece portion 56, is formed in a protruding shape having a size substantially equal to the fourth fitting portion 60, and the first piece When the part 54 and the second piece part 56 are joined, they are fitted into the fourth fitting part 60.

  A fourth fitting portion 60 is formed on each side edge of the second piece portion 56 in the circumferential direction. The 4th fitting part 60 is a site | part for fitting with the 3rd fitting part 58 of the 1st piece part 54, for example, is the hollow shape which has a magnitude | size substantially equal to the projection-like 3rd fitting part 58. FIG. It is formed.

  A method of forming the cable protection pipe line 100 in the entire inside of the existing pipe 200 using such a cable protection pipe member 10 and the joint member 42 will be described below.

  The existing pipe 200 is a steel pipe or the like embedded in the soil, and the pipe diameter is 70-90 mm. Manholes (not shown) are formed at both ends of the existing pipe 200.

  First, the cable protection tube member 10 is attached to the existing cable 202 in the vicinity of the insertion opening which is the end opening of the existing tube 200 inside the manhole. Specifically, the existing cable 202 is sandwiched between the first divided tube portion 32 of the first tube member 14 and the second divided tube portion 40 of the second tube member 16, and the first fitting portion 30 and the second fitting portion are sandwiched. As shown in FIG. 8, the existing cable 202 is accommodated in the first pipe line portion 20 of the cable protection pipe member 10 by fitting with the cable 38.

  Subsequently, another cable protection tube member 10 is attached to the existing cable 202 in the same manner as described above.

  Next, the end portions in the axial direction of the cable protection tube member 10 attached to the existing cable 202 are connected by the joint member 42.

  Specifically, the end portions in the axial direction of the cable protection tube members 10 adjacent to each other are abutted to each other, and the opening end portions of the first conduit portion 20 and the second conduit portions 22a and 22b of each cable protection tube member 10 are aligned. Is covered by the elastic member 44, and the outer peripheral surface of the outer tube portion 18 of each cable protection tube member 10 is covered by the covering portion 48 of the elastic member 44. The elastic member 44 is sandwiched between the first piece portion 54 and the second piece portion 56 of the short tube 52, and the third fitting portion 58 of the first piece portion 54 and the fourth fitting portion of the second piece portion 56. 60, the slit 50 of the elastic member 44 is held in a closed state.

  Then, the cable protection pipe line 100 constituted by the two cable protection pipe members 10 attached to the existing cable 202 and the joint member 42 connecting the end portions in the axial direction of the cable protection pipe members 10, The cable protection tube member 10 disposed on the rear side, that is, on the opposite side of the insertion direction is left behind and inserted into the insertion port of the existing tube 200.

  Next, a new cable protection pipe member 10 is attached to the rear side of the cable protection pipe line 100. Then, the cable protection pipe member 10 is connected to the rear end portion of the cable protection pipe line 100 which is not inserted into the existing pipe 200 and left outside by using the joint member 42, and the existing cable is newly added as it is. The cable protection tube member 10 attached to 202 is pushed into the existing tube 200 by the length of the cable protection tube member 10.

  And this is repeated until the front-end | tip of the cable protection pipeline 100 reaches the extraction opening which is the edge part opening of the existing pipe | tube 200, and work is complete | finished.

  As described above, in this embodiment, the first water stop material 28 stops water between the first pipe member 14 and the second pipe member 16 that are separable from each other. Therefore, the water-tightness of the cable protection tube member 10 can be obtained by simply joining the first tube member 14 and the second tube member 16 without performing a troublesome operation such as applying an adhesive or a sealing agent at the construction site. Sex can be maintained. Therefore, according to this embodiment, it is possible to improve the workability when the cable protection conduit 100 is inserted into the existing pipe 200.

  Further, in this embodiment, since the second conduit portions 22a and 22b are provided inside the cable protection tube member 10, even if the existing cable 202 is accommodated in the first conduit portion 20, the second conduit portion 22a and 22b can be used as new pipes into which new cables other than the existing cable 202 can be inserted. That is, a new cable laying space can be secured separately from the accommodation space of the existing cable 202.

  Furthermore, since the first pipe line part 20 and the second pipe line parts 22a, 22b are formed in a substantially circular cross section, the frictional force on the cable can be reduced. That is, in the first pipe line portion 20 used as a storage space for the existing cable 202, the insertion resistance when the cable protection pipe 100 is inserted into the existing pipe 200 can be reduced. And in 2nd pipe line part 22a, 22b used as a laying space of a new cable, insertion resistance at the time of inserting the new cable in 2nd pipe line part 22a, 22b can be made small.

  Furthermore, in this embodiment, the movement assisting portion 24 is formed on the outer peripheral surface of the main body 12 of the cable protection tube member 10. For this reason, when the cable protection pipeline 100 is inserted into the existing pipe 200, the contact area with the inner surface of the existing pipeline 100 can be reduced, and the frictional force against the movement of the cable protection pipeline 100 can be reduced. . Therefore, the insertion resistance when the cable protection pipeline 100 is inserted into the existing pipe 200 can be reduced, and even if the inner surface of the existing pipeline 100 is uneven, the cable protection pipeline 100 can be smoothly inserted into the existing pipe line 100.

  Further, in this embodiment, the water is stopped by the second water stop material 34 between the first fitting portion 30 and the second fitting portion 38. Therefore, between the first pipe member 14 and the second pipe member 16 that can be separated from each other, the first water-stopping material 28 and the second water-stopping material 34 are double-stopped, and the cable is more reliably connected. The water tightness of the protective tube member 10 can be maintained.

  In this embodiment, the outer tube portion 18 of the main body 12 is formed in a substantially circular cross section by joining a first tube wall 26 and a second tube wall 36 that are separable from each other. Here, as described above, as in the cable protection tube member of Patent Document 2, when one member having a part opened in the circumferential direction is forcibly formed into a perfect circular cross section, it remains on the member. In order to reduce this residual stress, a process for heating and softening the member is required. However, according to this embodiment, since no residual stress is generated in the outer tube portion 18 of the cable protection tube member 10, a process for heating and softening the member becomes unnecessary.

  Furthermore, in this embodiment, the cable protection conduit 100 is configured by abutting the ends of the cable protection tube member 10 in the axial direction and connecting the ends using the joint member 42. And the outer peripheral surface of the axial direction edge part of the outer tube | pipe part 18 of the main body 12 of the cable protection tube member 10 is coat | covered by the coating | coated part 48 of the elastic member 44 over the perimeter, The outer tube | pipe of the main body 12 The portion 18 and the elastic member 44 are water-stopped, and the covering portion 48 is in contact with the first water-stopping material 28 of the cable protection tube member 10, so that the first water-stopping material 28 of the elastic member 44 and The water is stopped.

  That is, according to this embodiment, only by connecting the axial ends of the cable protection tube member 10 using the joint member 42, the water tightness of the cable protection tube line 100 can be maintained over its entire length. Is possible.

  Furthermore, as shown in FIG. 9, the cable protection pipe member 100 can be bent by inclining the cable protection pipe members 10 abutted inside the joint member 42, so that the existing pipe 200 has a curved portion. Even if it exists, the cable protection conduit 100 can be smoothly inserted into the existing tube 200 by bending the cable protection conduit 100 according to the curved portion.

  In this embodiment, the elastic member 44 of the joint member 42 is formed with a through portion 46 having substantially the same shape as the entire outer shape of the conduit portions 20, 22 a, 22 b of the cable protection tube member 10. In the state where the axial ends of the cable protection tube member 10 are connected by the joint member 42, the open ends of the conduit portions 20, 22 a, and 22 b of the cable protection tube member 10 adjacent to each other through the through portion 46. Parts are included. Therefore, the cable protection tube members 10 can be connected to each other in a continuous manner in the axial direction without causing twisting in the circumferential direction.

  In the above-described embodiment, the cable protection pipe member 100 is inserted into the existing pipe 200 by the method of pushing the cable protection pipe member 10 from the insertion port 60 side of the existing pipe 200. However, the present invention is not limited to this. Absent. For example, the cable protection tube member 10 can be inserted into the existing pipe 200 by a method of pulling with a rope or the like from the outlet side of the existing pipe 200. These methods may be used in combination. The same applies hereinafter.

  Furthermore, as shown in FIG. 10, a water blocking material holding portion 62 that protrudes downward from the outer surface of the first tube wall 26 may be provided on the outer surface of the first tube wall 26. The water blocking material holding portion 62 is provided along the axial direction of the first tube wall 26, and the first water blocking material 28 is sandwiched between the first water blocking material 28 in cooperation with the first tube wall 26. Try not to come off. For example, the water stop material holding portion 62 is provided between one movement auxiliary portion 24 and the other movement auxiliary portion 24 so as not to hinder the contact between the first water stop material 28 and the covering portion 48 of the elastic member 44. It is formed within the length range.

  Furthermore, as a fastening member of the joint member 42, a stainless band 64 may be used instead of the short tube 52 covering the outer peripheral surface of the elastic member 44. For example, as illustrated in FIG. 11, the joint member 42 includes an elastic member 44 and a stainless steel band 64, and is configured by winding and tightening the stainless steel band 64 in the circumferential direction of the elastic member 44. As shown in FIGS. 12 and 13, for example, two stainless steel bands 64 are used to form the elastic member 44 in a state of including the respective duct portions 20, 22 a, 22 b of the cable protection tube members 10 adjacent to each other. Wrap. Then, by fastening the stainless steel band 64, the elastic member 44 can be held in a state where the slit 50 is closed. For example, if the outer shape of the elastic member 44 is formed in a slightly oval cylindrical shape (flat cylindrical shape) and the fastener of the stainless steel band 64 is disposed in the flattened portion, the fastener in the stainless steel band 64, etc. Does not protrude outward from the movement assisting portion 24 of the cable protection tube member 10.

  In the cable protection tube member 10 according to another embodiment of the present invention shown in FIGS. 14 to 17, a protrusion 66 is provided at the end of the cable protection tube member 10 in the axial direction. Hereinafter, the same numbers are assigned to portions common to the cable protection tube member 10 shown in FIG.

  As shown in FIGS. 14 and 15, a plurality of, in this embodiment, three protrusions 66 are provided at both ends in the axial direction of the cable protection tube member 10. The protrusion 66 is provided on the same plane as the opening end surfaces of the pipe sections 20, 22a, and 22b, and extends outward from the outer peripheral surface of the wall surface section that functions as the pipe wall of the pipe sections 20, 22a, and 22b. It protrudes and is fitted into the recess 68 of the elastic member 44 as will be described in detail later. In this embodiment, one projection 66 is provided so as to straddle the first conduit portion 20 and the second conduit portion 22a, and so as to straddle the first conduit portion 20 and the second conduit portion 22b. One projection 66 is provided, and one projection 66 is provided so as to straddle the second pipeline portion 22a and the second pipeline portion 22b.

  Further, as shown in FIGS. 16 and 17, the inner peripheral surface of the elastic member 44 is formed with a recess 68 having a shape substantially equal to the protrusion 66 at the center in the axial direction. Then, by fitting the projections 66 of the cable protection tube member 10 abutted inside the joint member 42 into the recesses 68, the projections 66 and the recesses 68, that is, the cable protection tube member 10 and the elastic members are elastic. The member 44 is locked to each other.

  According to this embodiment, even if a detachment force acts between the cable protection tube member 10 and the joint member 42, the protrusion 66 of the cable protection tube member 10 is locked to the recess 68 of the elastic member 44. Accordingly, the movement of the cable protection tube member 10 and the elastic member 44 in the direction away from each other is restricted, so that the cable protection tube member 10 and the joint member 42 are hardly separated.

  In this embodiment, a projection 66 is provided on the same plane as the opening end faces of the pipe sections 20, 22a, 22b, and a recess 68 is formed at the axial center of the inner peripheral surface of the elastic member 44. However, the present invention is not limited to this, and the protrusion 60 may be provided at the end of the main pipe 12 in the axial direction. For example, although illustration is omitted, a projection 66 is provided at an arbitrary position on the outer surface of the wall portion functioning as the tube wall of the pipe sections 20, 22 a, 22 b, and elasticity is provided corresponding to the position of the projection 66. The indented portion 68 may be formed on the inner surface of the member 44, or the protrusion 66 may be provided on the outer peripheral surface of the outer tube portion 18 of the cable protection tube member 10.

  Further, in this embodiment, a recess 68 is formed on the inner peripheral surface of the elastic member 44, and the protrusion 66 of the cable protection tube member 10 and the recess 68 of the elastic member 44 are locked together. There is no need to be limited. For example, although not shown, a protrusion 66 is provided on the outer peripheral surface of the outer tube portion 18, and the protrusion 66 is covered with the covering portion 48 of the elastic member 44, and the covering portion 48 of the elastic member 44 is located behind the protrusion 66. By tightening with a stainless steel band 64, the protrusion 66 and the elastic member 44 may be locked together. The point is that the protrusion 66 of the cable protection tube member 10 may be locked to the elastic member 44.

  Furthermore, the main pipe 12 and the protrusion 66 may be formed integrally in a factory, or those formed individually may be joined on site with an adhesive or the like.

  In the cable protection pipe member 10 according to another embodiment of the present invention shown in FIGS. 18 to 25, an inclined surface 72 is formed on the open end faces of the pipe sections 20, 22a and 22b. Hereinafter, the same numbers are assigned to portions common to the cable protection tube member 10 shown in FIG.

  As shown in FIG. 18, the cable protection tube member 10 constitutes the cable protection tube line 100 by connecting the end portions in the axial direction to the joint member 42, and has a short tube shape by injection molding or the like. Formed.

  As shown in FIGS. 19 and 20, the cable protection tube member 10 includes a main body 12 having a first tube member 14 and a second tube member 16 that can be separated from each other, that is, can be opened and closed. The main body 12 includes an outer tube portion 18 that functions as a tube wall, and the outer tube portion 18 includes a first tube wall 26 and a second tube wall 36.

  On the inner surface side of the outer pipe part 18, one first pipe part 20 and two second pipe parts 22a and 22b are formed. As shown in FIG. 21, the first pipe line part 20 and the second pipe line parts 22 a and 22 b are arranged at the respective vertices of the cross-sectional triangle, and their open end parts are the open end parts of the outer pipe part 18. It is located outside.

  Further, as shown in FIGS. 22 and 23, the opening end faces of the pipe sections 20, 22a, and 22b, that is, the end faces of the wall sections 70 that function as the pipe walls of the pipe sections 20, 22a, and 22b, are predetermined. An inclined surface 72 that is inclined at an angle θ is formed. The inclined surface 72 has a downward gradient from the center side to the peripheral side of the end surface of the main body 12 (that is, a gradient from the front end side to the back side of the main body 12). , 22a, 22b, three inclined surfaces 72 are formed, one at each of the opening end surfaces.

  The predetermined angle θ of the inclined surface 72 may be set in accordance with conditions such as the total length, the radius of curvature, and the intersection angle of the cable protection conduit 100, and the bending angle required for the cable protection tube member 10, that is, cable protection. It is preferable to set the same or substantially the same bending angle as one cable protection pipe member 10 in the pipe line 100.

  For example, when forming the cable protection pipe 100 having a total length of 150 m, a curvature radius of 2.5 m, and an intersection angle of 60 ° using the cable protection pipe member 10 having a pipe length of 230 mm, the angle θ of the inclined surface 50 is set to 4.6. It is good to set to degrees.

  Referring back to FIGS. 19 and 20, three protrusions 66 are provided on the outer peripheral surface of the wall surface portion 70 on the same plane as the opening end surfaces of the duct portions 20, 22 a, 22 b, and the protrusions of the elastic member 44 are provided. 68. In this embodiment, one projection 66 is provided so as to straddle the first conduit portion 20 and the second conduit portion 22a, and so as to straddle the first conduit portion 20 and the second conduit portion 22b. One projection 66 is provided, and one projection 66 is provided so as to straddle the second pipeline portion 22a and the second pipeline portion 22b.

  Further, on the outer peripheral surface of the outer tube portion 18 of the main body 12, a movement assisting portion 24 is formed at each of both ends in the axial direction. The movement assisting part 24 extends from the front end side to the rear side of the main body 12 so that the movement assisting part 24 does not get caught inside the existing pipe line 200 when the cable protection pipe line 100 is inserted into the existing pipe 200. The maximum outer diameter is set smaller than the inner diameter of the existing pipe 200.

  A first water stop material 28 is provided on both side edges in the circumferential direction of the first pipe wall 26, and a water stop material holding portion 62 is formed outside the first water stop material 28. As shown in FIG. 24, the water blocking material holding portion 62 protrudes downward from the outer surface of the first tube wall 26 and sandwiches the first water blocking material 28 in cooperation with the first tube wall 26. The first water stop material 28 is prevented from being detached.

  Further, on both side edges in the circumferential direction of the second tube wall 36, protrusions 74 are formed at positions corresponding to the first water stop material 28. The protrusion 74 is formed continuously over the entire length along the axial direction of the second pipe member 16, and in a state where the first fitting portion 30 and the second fitting portion 38 are fitted together, The first water blocking material 28 is pressed toward the first tube wall 26 side. Thereby, the water stoppage between the 1st pipe member 14 and the 2nd pipe member 16 is improved.

  As shown in FIGS. 25 and 26, the joint member 42 includes an elastic member 44 and a short pipe 52 that covers the outer peripheral surface of the elastic member 44, and as described above, the axial direction of the cable protection tube member 10. Connect the ends of each other.

  A through portion 46 that is a space having substantially the same shape as the outer shape of the wall surface portion 70 is formed at a substantially central portion of the elastic member 44, and the axial ends of the cable protection tube member 10 are connected to each other by the joint member 42. In the connected state, the through ends 46 include the open end portions of the conduit portions 20, 22a, and 22b of the cable protection tube member 10 adjacent to each other.

  A slit 50 extending in the axial direction is formed in a part of the elastic member 44 in the circumferential direction. The slit 50 is formed so as to be inclined with respect to the radial direction of the elastic member 44, and the water stoppage in the circumferential direction of the elastic member 44 is improved by the inclined portion 50 a. Further, when the double-sided tape is applied and the slit 50 is closed, the double-sided tape attached to the inclined portion 50a can be easily adhered, so that workability can be improved.

  As shown in FIG. 27, the short pipe 52 has a first half part 54 and a second half part 56 that are separable from each other, that is, that can be opened and closed, and are substantially half-short cylindrical.

  Third fitting portions 58 a and 58 b are formed on both side edges in the circumferential direction of the first piece portion 54, and fourth fitting portions 60 a and 60 b are formed on both side edges in the circumferential direction of the second piece portion 56. Each is formed. The third fitting portion 58a is formed on one side edge in the circumferential direction of the first piece portion 54, and in the fourth fitting portion 60a in the vertical direction, that is, the first pipe member 14 and the second pipe member 16. Are fitted in the same direction as the bonding direction. Further, the third fitting portion 58b is formed on the other side edge in the circumferential direction of the first piece portion 54, and laterally inside the fourth fitting portion 60b, that is, the first tube member 14 and the second tube member. 16 is fitted in a direction orthogonal to the direction of joining to the joint 16.

  A third water stop material 76 is provided on the inner surface of the short pipe 52. The third water stop material 76 is formed in a sheet shape by water-absorbing fibers, and is provided so as to be attached to the inner surface of the short tube 52. As a specific example of the water-absorbent fiber, for example, Lanseal F (trade name) manufactured by Toyobo Co., Ltd. can be used as a commercial product.

  As shown in FIGS. 25 and 26, the third water stop material 76 covers the outer peripheral surface of the elastic member 44 over the entire circumference, and the axial direction of the main pipe 12 of the cable protection pipe members 10 adjacent to each other. The outer peripheral surface of the end of the cable is covered over the entire circumference, and further, the first water stop member 28 of the cable protection tube member 10 is contacted. Thus, the third waterstop 76 and the cable protection tube member 10 are obtained by overlapping the outer peripheral surface of the axial end of the main pipe 12 and the outer peripheral surface of the elastic member 44 with the third waterstop 76. Between the third water stop member 76 and the first water stop member 28 of the cable protection tube member 10, and further, the third water stop member 76 and the third water stop member 76 are elastic. The water between the member 44 is stopped.

  The inventors of the present application overlap the outer peripheral surface of the axial end of the main pipe 12 and the outer peripheral surface of the elastic member 44 with the third water-stopping material 76 formed of water-absorbing fibers, thereby protecting the cable protection tube. As a result of an experiment on the water tightness of the connecting portion between the member 10 and the joint member 42, it has been confirmed that water leakage does not occur even at 0.1 MPa.

  As described above, in this embodiment, the inclined surface 72 that is inclined at the predetermined angle θ is formed on the opening end surfaces of the pipe sections 20, 22a, and 22b. For this reason, when the cable protection tube member 10 is abutted inside the joint member 44, a gap is generated between the open end surfaces of the pipe portions 20, 22a, and 22b of the adjacent cable protection tube members 10. The tube member 10 can be easily tilted. Therefore, it is easy to form the curved cable protection conduit 100.

  Furthermore, even if the cable protection pipe member 10 is tilted, the open ends of the pipe sections 20, 22a, and 22b do not contact each other locally, and there is a risk that the contact location may be damaged or deformed. Can be reduced.

  Further, in this embodiment, a third water stop material 76 is provided on the inner surface of the short pipe 52 to overlap the outer peripheral surface of the axial end of the main pipe 12 and the outer peripheral surface of the elastic member 44. For this reason, the water stop of the connection part of the cable protection pipe member 10 and the coupling member 42 can be improved, and also the water stop in the circumferential direction of the elastic member 44 can be improved.

  In addition, since the third water-stopping material 76 is formed of water-absorbing fibers, the third water-stopping material 76 can be made thinner as compared with the case where water-expanded rubber or the like is used as a material. Only the diameter of the joint member 42 can be reduced.

  Furthermore, in this embodiment, the third fitting portion 58a of the first piece portion 54 and the fourth fitting portion 60a of the second piece portion 56 are fitted in the vertical direction, and the third piece 54 of the first piece portion 54 is fitted. The fitting portion 58b and the fourth fitting portion 60b of the second piece portion 56 are fitted in the lateral direction. Thus, it fits with one fitting part (the 3rd fitting part 58a, the 4th fitting part 60a), and the other fitting part (the 3rd fitting part 58b, the 4th fitting part 60b). By making the alignment directions orthogonal, the first piece 54 and the second piece 56 can be joined while absorbing the dimensional tolerance. Therefore, the short tube 52 can be formed into a substantially circular cross section.

  Further, since the third fitting portion 58b and the fourth fitting portion 60b are fitted in the lateral direction, that is, the direction orthogonal to the joining direction of the first pipe member 14 and the second pipe member 16, the third fitting is performed. When the fitting portion 58b is pushed into the fourth fitting portion 60b, the fourth fitting portion 60b hits the elastic member 44 and receives a reaction force therefrom, whereby the pushing force can be appropriately transmitted. That is, the third fitting portion 58b and the fourth fitting portion 60b can be fitted together stably and efficiently.

  On the other hand, when the third fitting portion 58a is pushed into the fourth fitting portion 60a, the fourth fitting portion 60a does not hit anywhere and cannot receive a reaction force. There is a possibility that deformation such as warpage may occur in 56, and it is difficult to fit the third fitting portion 58a and the fourth fitting portion 60b.

  Therefore, first, the third fitting portion 58a of the first piece portion 54 is vertically fitted to the fourth fitting portion 60a of the second piece portion 56, and then the third fitting of the first piece portion 54 is performed. If the part 58b is fitted in the fourth fitting part 60b of the second piece part 56b in the lateral direction, the dimensional tolerance is absorbed at the time of joining the first piece part 54 and the second piece part 56, Workability can be improved.

  Moreover, in this case, since the third fitting portion 58a and the fourth fitting portion 60a are fitted in the vertical direction, by inserting a flathead screwdriver from the outside into the fitting portion, The third fitting portion 58a and the fourth fitting portion 60a can be easily removed. Therefore, first, the fitting of the third fitting part 58a of the first piece part 54 and the fourth fitting part 58a of the second piece part 56 is removed, and then the third fitting part 58b of the first piece part 54 is removed. If the fitting of the second piece portion 56 and the fourth fitting portion 58b is removed, the first piece portion 54 and the second piece portion 56 can be easily separated even in the event of an emergency. It is.

  In this embodiment, the inclined surface 72 having a downward slope from the central side toward the peripheral side is formed on the opening end surfaces of the pipe line portions 20, 22a, 22b. However, the present invention is not limited to this. This is because the open end faces of the pipe sections 20, 22a, 22b are located outside the open end of the outer pipe section 18, and the open end faces of the pipe sections 20, 22a, 22b are in the axial direction of the main body 12. For example, when the opening end of the outer pipe portion 18 is located outside the opening ends of the pipe sections 20, 22a, and 22b, the opening end face of the outer pipe portion 18 corresponds to the end face. Alternatively, the inclined surface 72 may be formed.

  Moreover, it is not necessary to be limited to the inclined surface 72, and a stepped surface whose center side is higher than the peripheral side may be formed on the end surface in the axial direction of the main body 12, For example, a protruding contact portion having a tip surface formed in a curved shape may be formed in the portion.

  In short, the end surface in the axial direction of the main body 12 may be formed in a shape in which the center side protrudes compared to the peripheral side.

  Further, in this embodiment, a protrusion 74 is formed on the second pipe member 16 at a position corresponding to the first water stop material 28, and the first water stop material 28 is formed on the first pipe wall by the protrusion 74. Although it was pressed to the 26th side, it is not necessary to be limited to this. For example, although not shown, a protrusion 74 is provided on the circumferential edge of the first pipe member 14, and the first water blocking material 28 is pressed against the second pipe wall 36 by the protrusion 74. May be.

  Furthermore, in this embodiment, one third fitting portion 58a of the two third fitting portions 58 is fitted in the vertical direction, that is, in the joining direction of the first tube member 14 and the second tube member 16. The other third fitting portion 58b is fitted in the lateral direction, that is, in the direction orthogonal to the joining direction of the first pipe member 14 and the second pipe member 16, but it is necessary to be limited to this. Rather, it is fitted with one fitting part (the third fitting part 58a, the fourth fitting part 60a) and the other fitting part (the third fitting part 58b, the fourth fitting part 60b). The direction should just be orthogonal. For example, one third fitting portion 58a is fitted in a direction inclined by 45 ° from the joining direction of the first tube member 14 and the second tube member 16, and the other third fitting portion 58b is fitted. You may make it fit in the direction inclined 135 degrees from the joining direction of the 1st pipe member 14 and the 2nd pipe member 16. FIG. However, “orthogonal” in this embodiment does not define whether or not the fitting direction is strictly orthogonal, and includes the case where the fitting direction is substantially orthogonal.

  Moreover, one fitting part (the 3rd fitting part 58a, the 4th fitting part 60a) and the other fitting part (the 3rd fitting part 58b, the 4th fitting part 60b) are each laterally arranged. You may make it fit in the direction, ie, the direction orthogonal to the joining direction of the 1st pipe member 14 and the 2nd pipe member 16. In this case, when the first piece portion 54 and the second piece portion 56 are joined, the dimensional tolerance cannot be absorbed, but as described above, the third fitting portion 58 and the fourth fitting portion can be joined. Since the joint portion 60 can be stably and efficiently fitted, workability is further improved.

  In each of the above-described embodiments, the elastic member 44 has a substantially C-shaped cross section in which a slit 50 is formed in a part of the circumferential direction thereof. In this slit 50, the elastic member 44 is opened and closed. The cable protection tube member 10 can be attached to and detached from the cable protection tube member 10, but it is not necessary to be limited to this. For example, as shown in FIGS. 28 and 29, two slits 50 are formed in the elastic member 44, and the elastic member 44 is divided into two in the slit 50, so that the elastic member 44 is made into the cable protection tube member 10. It may be removable. 28 and 29, the cable protection tube member 10 in the embodiment of FIG. 10 is illustrated, but the cable protection tube member 10 in the embodiment of FIG. 14 and the cable protection tube member 10 in the embodiment of FIG. It is the same.

  Further, in each of the above-described embodiments, the two second conduit portions 22a and 22b are provided on the inner surface side of the outer tube portion 18 of the cable protection tube member 10, but it is not necessary to be limited to this. Depending on the outer diameter of the existing cable 202 or the like, that is, the size of the surplus space in the existing pipe 200 or the like, the number of the second pipeline portions 22 can be changed as appropriate.

  Furthermore, in each of the above-described embodiments, the movement assisting portion 24 is formed over the entire circumference of the outer peripheral surface of the outer tube portion 18 of the main tube 12, but it is not necessary to be limited to this. You may make it form the movement assistance part 24 intermittently in the circumferential direction of 18. FIG. Further, the movement assisting portion 24 may be partially formed on the outer peripheral surface of the outer tube portion 18. For example, the movement assisting portion 24 may be formed only on the first tube wall 26, and the second tube wall. The movement assisting part 24 may be formed only on 36. Further, the outer pipe portion 18 and the movement assisting portion 24 may be formed integrally in a factory, or those formed individually may be joined on site with an adhesive or the like.

  In each of the above-described embodiments, the first pipe member 14 and the first fitting part 30 of the first pipe member 14 and the second fitting part 38 of the second pipe member 16 are fitted together. Although the 2nd pipe member 16 was joined, it is not necessary to be limited to this. The joining structure of the 1st pipe member 14 and the 2nd pipe member 16 can employ | adopt appropriate joining structures, such as a latch and engagement, For example, although illustration is abbreviate | omitted, it is with fastening tools, such as a stainless steel band. The first pipe member 14 and the second pipe member 16 may be joined.

  Further, in each of the above-described embodiments, the space between the wall surface portion functioning as the tube wall of the conduit portions 20, 22a, and 22b and the outer tube portion 18 is hollow, but it is necessary to be limited to this. Absent. When the cable protection tube member 10 is molded, the cavity may be filled and molded. In this case, the flat rigidity of the cable protection tube member 10 is increased.

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

DESCRIPTION OF SYMBOLS 10 ... Cable protection pipe member 12 ... Main pipe 14 ... 1st pipe member 16 ... 2nd pipe member 18 ... Outer pipe part 20 ... 1st pipe line part 22a, 22b ... 2nd pipe line part 24 ... Movement assistance part 26 ... 1st pipe wall 28 ... 1st water stop material 30 ... 1st fitting part 32 ... 1st division | segmentation pipe part 34 ... 2nd water stop material 36 ... 2nd pipe wall 38 ... 2nd fitting part 40 ... 2nd division | segmentation Pipe part 42 ... Joint member 44 ... Elastic body 50 ... Slit 52 ... Short pipe 54 ... First piece 56 ... Second piece 58 ... Third fitting part 60 ... Fourth fitting part 66 ... Projection part 100 ... Cable Protective pipe 200 ... Existing pipe 202 ... Existing cable

Claims (14)

A cable protection tube member to be inserted into an existing pipe in which a cable is laid,
A body having first and second pipe members separable from each other;
A first split pipe formed on the first pipe member;
A second split pipe part formed on the second pipe member and forming a first pipe line part for accommodating the cable in cooperation with the first split pipe part;
At least one second conduit portion formed independently of the first conduit portion on at least one of the first and second tube members, and any one of the first and second tube members A cable protection tube comprising a first water-stop material provided to stop water between the first tube member and the second tube member in a state where the first tube member and the second tube member are joined together Element.   The cable protection pipe member according to claim 1, wherein the cable protection pipe member has a short pipe shape as a whole and constitutes a cable protection pipe line by connecting end portions in an axial direction in a watertight manner. The first and second pipe members respectively include first and second pipe walls that are separable from each other;
The first divided pipe portion is formed on the inner surface side of the first tube wall, the second divided tube portion is formed on the inner surface side of the second tube wall, and the second pipe portion is formed on the first pipe wall. Formed on the inner surface side of at least one of the first and second pipe walls, and the first water blocking material is provided on both circumferential edges of either the first or second pipe wall, The cable protection tube member according to claim 1 or 2, wherein water is stopped between the first tube wall and the second tube wall in a state where the first tube member and the second tube member are joined. A first fitting portion formed on the inner surface side of the first tube wall;
A second fitting portion that is formed on the inner surface side of the second tube wall and fits with the first fitting portion; and the first fitting portion and the second fitting portion are fitted together The cable protection tube member according to claim 3, further comprising a second water stop material that stops water between the first fitting portion and the second fitting portion.   5. The cable protection tube member according to claim 2, wherein the axial end surface of the main body is formed in a shape in which a central side protrudes as compared with a peripheral side.   The cable protection tube member according to claim 5, wherein the end surface has an inclined surface that is inclined downward from the center side toward the peripheral side.   The cable protection tube member according to claim 6, wherein an inclination angle of the inclined surface is set according to a bending angle shared by one cable protection tube member in the cable protection conduit.   The cable protection tube member according to claim 5, wherein the end surface has a stepped surface whose central side is higher than the peripheral side.   The cable protection tube member according to any one of claims 1 to 8, further comprising a movement auxiliary portion provided on an outer peripheral surface of the main body.   10. The cable protection tube member according to claim 1, wherein each of the first and second pipe sections is formed in a substantially circular cross section. A cable protection pipe line in which the cable protection pipe member according to any one of claims 1 to 10 is connected in an axial direction using a joint member,
The joint member includes an elastic member including an axial end portion of the cable protection tube members adjacent to each other,
The elastic member covers the outer peripheral surface of the main body over the entire circumference, and the elastic member and the first water blocking material are in contact with each other. A cable protection pipe line in which the cable protection pipe member according to any one of claims 1 to 10 is connected in an axial direction using a joint member,
The joint member is
An elastic member including axial ends of the cable protection tube members adjacent to each other, and a water-absorbing fiber, covering the outer peripheral surface of the elastic member over the entire circumference, and covering the outer peripheral surface of the main body Including a third waterstop covering the entire circumference,
A cable protection conduit in which the third water stop material and the first water stop material are in contact with each other. The joint member further includes a short pipe having first and second pieces that cover the outer peripheral surface of the elastic member and are separable from each other;
The short pipe is
Including two third fitting parts formed on the first piece part, and two fourth fitting parts formed on the second piece part and fitted on the first fitting part,
In the first direction, one of the third fitting portions and one of the fourth fitting portions fit together, and in the second direction perpendicular to the first direction, the other third fitting portion and the other The cable protection conduit according to claim 11 or 12, wherein the fourth fitting portion is fitted.   The cable according to any one of claims 11 to 13, wherein a protruding portion that protrudes outward is provided at an end portion in the axial direction of the cable protection tube member, and the protruding portion and the elastic member are engaged with each other. Protective conduit.

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