JP2009052610A - Coupling member and pipeline lying method using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve operability in lying pipeline. <P>SOLUTION: This coupling member 10 including a cylindrical part 12 and a locking part 14 is mounted to extend over a joint part 54 of the pipeline 56 formed by joining the ends of pipeline members 50 to each other to connect the ends of the pipeline members and reinforce the same. The cylindrical part 12 covers the joint part 54. The locking part 14 is formed on the cylindrical part 12 and fitted to the respective projecting parts 52 of the adjacent pipeline members 50. Thus, in drawing the pipeline 56, tensile force applied to the joint part and bending deformation can be reduced so that even when joining between the pipeline members 50 in the joint part 54 is weak, the coupling member 10 retains the mutual pipeline members 50 to construct pipeline. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a connecting member and a pipe laying method using the connecting member, and in particular, for example, a connecting member mounted so as to straddle a joint portion of a pipe line formed by joining ends of the pipe member and the same. The present invention relates to a pipe laying method to be used.

An example of a conventional pipe laying method is disclosed in Patent Document 1. In the method of inserting the underground underground conduit material disclosed in Patent Document 1, the conduit material is inserted into the existing conduit by the drawing-in guide member. Then, while this insertion is in progress, while the heating and melting connection carriage is advanced, the ends of the adjacent pipe materials are butt-fused in the heating and melting connection carriage to connect the pipe drawing work and the pipe material. Work is done in parallel.
Japanese Patent No. 3552993 [F16L 1/224]

  In the prior art of Patent Document 1, the construction time is reduced by performing the pipe drawing work and the pipe material connecting work in parallel. However, in general, the required time for pulling in the pipe is about 4 minutes per meter, and a pipe material having a total length of 5 m takes about 20 minutes to pull in. On the other hand, it usually takes about 60 minutes until the fusion position is solidified after butt fusion. Therefore, it is not possible to perform all butt fusion and cooling of the pipe material while inserting the pipe material. For this reason, even if some of these operations can be performed in parallel, the insertion of the pipe material must be stopped for most of the cooling time of the fusion position. Therefore, in the prior art of patent document 1, construction time can hardly be shortened and work efficiency is bad. Further, if a plurality of fusions are performed at the same time, the time can be shortened, but it is not practical because there are restrictions on the place, apparatus, and personnel.

  Therefore, a main object of the present invention is to provide a novel connecting member and a pipe laying method using the connecting member.

  Another object of the present invention is to provide a connecting member and a pipe laying method using the connecting member that can improve the working efficiency.

  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 with embodiments to be described later in order to help understanding of the present invention, and do not limit the present invention.

  A first invention is a connecting member that is mounted so as to straddle a joint part of a pipe line formed by joining ends of pipe members, and is formed at least in a cylinder part that covers the joint part and the cylinder part It is a connection member provided with the latching | locking part with the pipe line member for preventing isolation | separation of a junction part.

  In the first invention, the connecting member (10) is mounted so as to straddle the joining portion (54) of the conduit (56) formed by joining the ends of the conduit member (50) by butt fusion or the like. Then, the ends of the pipe members are connected to each other. The connecting member has a cylindrical portion (12) and a locking portion (14) for preventing separation of the joint portion. The cylindrical portion is formed in a cylindrical shape by a synthetic resin such as hard vinyl chloride, for example, and covers at least the joint portion of the pipe line. The tubular portion is formed with a locking portion with a pipe member having, for example, a shape in which the inner peripheral surface of the tubular portion is recessed. The locking part reinforces the connection between the pipe members at the joint part of the pipe line, and reduces the tensile force and bending deformation applied to the joint part when the pipe line is drawn or installed. Therefore, even if the joint between the pipe members in the joint portion is weak, the connecting member holds the pipe members, so the pipe can be laid, for example, when the pipe members are fusion-bonded Can shorten the time to wait until the joint is sufficiently cooled and solidified.

  According to the first invention, it is possible to improve the working efficiency when laying a pipeline.

  The second invention is dependent on the first invention, and the pipe member is formed with a convex part protruding outward in the radial direction or a concave part recessed inward, and the locking part is a convex part or a concave part. Fits together.

  In 2nd invention, a convex-shaped part (52) or a concave-shaped part (62) is formed in the pipe line member (50) along the outer peripheral surface. The convex portion has, for example, a shape that protrudes outward in the radial direction, and the concave portion has, for example, a shape that is recessed inward in the radial direction or penetrates the duct member. Further, the cylindrical portion (12) is formed with, for example, a locking portion (14) having a shape in which the inner peripheral surface of the cylindrical portion is recessed or the inner peripheral surface of the cylindrical portion protrudes. Fits together. When the engaging portion of the connecting member (10) and the convex or concave portion of each adjacent pipe member are fitted together, the joint portion (54) is applied when the pipe (56) is drawn. Tensile force and bending deformation are reduced. Therefore, even if the joint between the pipe members at the joint portion is weak, the pipe member can be laid because the connecting member holds the pipe members.

  According to the 2nd invention, there exists an effect similar to the 1st invention.

  3rd invention is dependent on 1st or 2nd invention, and is further provided with the projection part which is formed in the cylinder part and protrudes on the outer side of radial direction.

  In 3rd invention, the projection part (18) which protrudes on the cylinder part (12) from the outer peripheral surface to the radial direction outer side is formed. The protrusion is formed in a trapezoidal plate shape that extends over the entire length of the tube portion in the tube axis direction, for example. By forming the protruding portion on the tube portion, for example, when the pipe (56) is laid in the ground by the propulsion method, earth pressure is applied to the protruding portion from the surrounding soil, and the tube portion is tightened.

  According to the third aspect of the invention, the connecting member is fixed to the pipe line without detaching from the pipe line.

  A fourth invention is dependent on any one of the first to third inventions, and the cylindrical portion is formed by a plurality of members divided in the circumferential direction.

  In 4th invention, a cylinder part (12) is formed of the several member divided | segmented into the circumferential direction, for example, the 1st half cylinder part (12a) and 2nd half cylinder which are formed in a substantially half cylinder shape. The parts (12b) are combined to form a cylinder. Thereby, a cylinder part can be mounted | worn so that a junction part (54) may be pinched | interposed by a 1st half cylinder part and a 2nd half cylinder part.

  According to the fourth invention, the connecting member can be easily attached.

  A fifth invention is dependent on any one of the first to fourth inventions, and the cylinder part is formed so as to be divided in the tube axis direction, and the divided cylinder is provided so that the distance between the end parts of the cylinder part can be adjusted. It further has a cylinder connecting means for connecting the parts.

  In 5th invention, a cylinder part (12) is divided | segmented in a pipe-axis direction. In addition, engaging portions (26) made of, for example, a concave shape and a convex shape are formed as cylindrical portion connecting means at the divided portions of the cylindrical portion, respectively. The divided cylindrical portions are connected by fitting the concave shape and the convex shape of each engaging portion. And the distance between the edge parts (16) of the cylinder part 12 is adjustable by changing the location where a concave shape and a convex shape fit. Therefore, even if the position of the convex portion (52) changes when the pipe member (50) is joined, the locking portion (14) of the connecting member (10) can be matched.

  A sixth invention is dependent on any one of the second to fifth inventions, wherein the locking portion penetrates the cylindrical portion, and the thickness of the cylindrical portion is equal to or substantially equal to the height of the convex portion.

  In 6th invention, a latching | locking part (14) is a rectangular parallelepiped hole which penetrates the tube wall of a cylinder part (12), for example. Moreover, a convex-shaped part (52) is formed in a pipe line member (50). And the tube wall of a cylinder part is formed in the thickness equal to or substantially equal to the height of a convex-shaped part. Therefore, when the engaging portion and the convex portion are fitted together, the outer peripheral surface of the cylindrical portion and the tip surface of the convex portion are not surfaced without the convex portion protruding outward from the outer peripheral surface of the cylindrical portion 12. Become one.

  According to the sixth invention, the insertion resistance of the pipe is reduced, and the connecting member and the pipe are fixed with the maximum strength.

  A seventh invention is dependent on any one of the first to sixth inventions, and the cylindrical portion is further covered with a protective cover.

  In 7th invention, a connection member (10) is further equipped with the protective cover (30) which covers a cylinder part (12). The protective cover is formed in a cylindrical shape by, for example, a vinyl chloride pipe, and has an inner diameter that is substantially equal to the outer diameter of the cylindrical portion. By covering the tube portion with the protective cover, the rigidity of the connecting member (10) is ensured, and the bending of the joint portion (54) is limited. Therefore, for example, when the pipe line (56) to which the connecting member is mounted is drawn from the ground into the propulsion hole (72) or disposed in the cut groove (74), the bending force to the joint portion caused by the height difference is reduced. be able to. Therefore, even if the joining of the pipe members (50) is weak, the pipe can be laid without problems.

  An eighth invention is a pipe laying method in which a pipe line is laid in the ground by a propulsion method using the connecting member according to any one of the first to seventh aspects, and (a) laying a pipe line Forming a small diameter propulsion hole over the entire length of the section, (b) joining the pipe members to form a pipe line, (c) attaching a connecting member so as to straddle the joint part of the pipe line, (d ) Pull the pipe line with the connecting member attached in step (c) into the propulsion hole by a predetermined distance, and (e) repeat steps (b) to (d) to lay the pipe over the entire length of the laying section. This is a method of laying a pipeline.

  In the eighth invention, the pipe member (56) is laid in the ground by a propulsion method such as the HDD method using the connecting member (10). In step (a), for example, the pilot head (90) penetrates from the starting stand (80) into the ground and is advanced to the reaching shaft (82) to propel a small diameter over the entire length of the pipeline laying section. A hole (92) is formed. In step (b), for example, by butt fusion or the like, the end of the pipe member (50) to be drawn in first is abutted and joined to form the pipe line. In step (c), the connecting member is mounted so as to straddle the joint portion (54) of the pipe line. In step (d), the propulsion hole is enlarged by, for example, an enlarged diameter reamer (94). Then, the pipe line to which the connecting member is attached is newly joined to a predetermined distance, for example, the end of the pipe line, and the length of the pipe member to which the connecting member is attached is drawn into the propulsion hole. Then, in step (e), a work for newly joining the pipe member to the end of the pipe line, a work for attaching the connecting member to the joined portion, and a length of the pipe member having the connecting member attached thereto The operation of drawing the pipe is repeated to lay the pipe over the entire length of the laying section.

  According to the eighth invention, the work efficiency when laying the pipeline is improved by the propulsion method.

  A ninth invention is a pipe laying method in which a pipe line is laid in the ground by an open-cut method using the connecting member according to any one of the first to seventh aspects, and (a) laying of the pipe line Excavating the ground along the section, forming an open groove, (b) joining pipe members to form a pipe, and (c) attaching a connecting member so as to straddle the joint part of the pipe , (D) bury the pipe line with the connecting member attached in step (c) at a predetermined distance, and (e) steps (a) to (d), or steps (b) to (d) This is a pipe laying method in which the step d) is repeated to lay the pipe over the entire length of the laying section.

  In 9th invention, a pipe line (56) is laid in the ground by the excavation method which excavates a road surface using a connection member (10). In step (a), the ground is excavated along the laying section of the pipeline to provide an excavation groove (96). For example, a retaining sheet pile (98) for preventing the surrounding soil from collapsing is provided in the excavation groove. Install on the side. In step (b), the end of the pipe member (50) to be buried in advance is joined to the tip of the pipe member to be buried after that by, for example, EF joining, thereby forming a pipe. In step (c), the connecting member is mounted so as to straddle the joint portion (54) of the adjacent duct members. In step (d), the pipe line with the connecting member mounted in the cut groove is newly joined to the end of the pipe line at a predetermined distance, for example, the length of the pipe member with the connecting member disposed, and backfilled. To go.

  And, in step (e), the work of excavating the ground as necessary to extend the excavation groove, the work of newly joining the pipe member to the end of the pipe, the work of attaching the connecting member to the joint part, and The operation of burying the pipeline in the cut groove is repeated for each length of the pipeline member to which the connecting member is mounted, so that the pipeline is sequentially buried, and the pipeline is laid over the entire length of the laying section.

  According to the ninth aspect of the invention, the work efficiency when laying the pipeline is improved by the open-cut method.

  According to this invention, the work efficiency at the time of laying a pipe line can be improved.

  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 FIGS. 1 and 2, a connecting member 10 according to an embodiment of the present invention includes a cylindrical portion 12 and a locking portion 14 formed on the cylindrical portion 12. The connecting member 10 is mounted so as to straddle the joint portion 54 of the pipe 56 when the pipe 56 formed by joining ends of the pipe member 50 is laid in the ground. Connect the ends of each other.

  As shown in FIGS. 1 and 2, the cylindrical portion 12 is made of a synthetic resin such as hard vinyl chloride, and is formed by a first half cylindrical portion 12a and a second half cylindrical portion 12b. The first half-cylinder part 12a and the second half-cylinder part 12b are formed, for example, in a substantially halved cylindrical shape by injection molding, and the cylindrical part 12 is formed in a cylindrical shape by combining them. For example, the inner diameter of the cylindrical portion 12 is set to be equal to or substantially equal to the outer diameter of the pipe member 50, covers at least the joining portion 54 of the pipe 56, and also covers a convex portion 52 of the pipe member 50 described later. For example, the cylindrical portion 12 has an inner diameter of 150 mm and a length of 600 mm. The end portion 16 of the cylindrical portion 12 is formed in a tapered shape whose diameter decreases as the outer peripheral surface goes to the end. Moreover, the thickness of the tube wall which forms the cylinder part 12 is equal to or substantially equal to the height of the convex part 52 described later, and is, for example, 20 mm.

  The cylindrical portion 12 is formed with a plurality (eight in this embodiment) of engaging portions 14 with the pipe member 50 for preventing the joint portion 54 from being isolated. The locking part 14 is, for example, a hole that penetrates the tube wall of the cylindrical part 12 in a rectangular parallelepiped shape. The locking portion 14 is formed in accordance with the arrangement and number of convex portions 52 of the duct member 50 described later, and fits with the convex portions 52. For example, the length of the locking portion 14 in the circumferential direction is 100 mm, and the length in the tube axis direction is 30 mm. In the vicinity of the end portion 16 of the cylindrical portion 12, for example, in the vicinity of the center of 50 mm from the end portion 16 of the cylindrical portion 12, the four locking portions 14 are arranged in the circumferential direction and straight line of the cylindrical portion 12, and adjacent pipe members It fits and is fixed to each convex part 52 of 50.

  Further, the cylindrical portion 12 is formed with a plurality of (two in this embodiment) projecting portions 18 protruding outward in the radial direction from the outer peripheral surface thereof. The protrusion 18 is formed in a trapezoidal plate shape that extends over the entire length of the tube portion 12 in the tube axis direction, for example. For example, one protrusion 18 is formed at the center in the circumferential direction of each of the first and second semi-cylindrical parts 12a and 12b, the height thereof is 15 mm, and the thickness thereof is 5 mm.

  A method of laying the pipe 56 in the ground by using a propulsion method that does not excavate the road surface, such as an HDD (guided horizontal boring) method, using the connecting member 10 will be described below.

  As shown in FIG. 3 and FIG. 4, first, the starting resistance 80 and the reaching resistance 82 are dug at both ends of the laying section of the pipeline 56. Then, a penetrating resister 84 is provided on the front side of the starting resister 80, that is, on the side opposite to the ultimate resister 82, and a drill unit 86 is prepared on the ground surface further on the near side of the penetrating resister 84.

  The drill unit 86 is a hydraulic device including a drill rod 88 and a pilot head 90. The pilot head 90 attached to the tip of the drill rod 88 is penetrated from the starting resistor 80 into the ground in the horizontal direction from the starting resistor 80 via the penetration resistor 84. The pilot head 90 ejects drilling water for discharging the soil generated during excavation from the tip of the pilot head 90 and propels it underground. In this manner, the pilot head 90 draws the iron drill rod 88 into the ground to form a small diameter propulsion hole 92. Then, the position of the pilot head 90 is confirmed from the ground using a locator, and the depth and direction thereof are appropriately instructed and propelled to the reaching shaft 82. When the pilot head 90 reaches the reach shaft 82, the pilot head 90 is removed from the drill rod 88, and instead, an enlarged reamer 94 adapted to the outer diameter of the pipeline 56 is attached.

  Here, on the ground around the reach shaft 82, the connecting member 10 and the plurality of pipe members 50 are prepared, and the pipe 56 to which the connecting member 10 is attached is formed.

  For example, the prepared pipe member 50 is made of a synthetic resin such as polyethylene and is formed in a cylindrical shape by extrusion molding. The pipe length of the pipe line member 50 is 5 m, for example. Further, the pipe member 50 is formed with, for example, a convex portion 52 protruding outward from the outer peripheral surface in the radial direction. The convex portion 52 is formed of, for example, a synthetic resin such as polyethylene, and is attached to the pipe line member 50 at a factory or the like. Since the convex portion 52 is fitted with the aforementioned locking portion 14, the convex portion 52 has the same shape as the locking portion 14, that is, a rectangular parallelepiped shape.

  For example, the end of the pipe member 50 adjacent to the end of the pipe member 50 is abutted, and these are joined by butt fusion to form the pipe 56. When the pipe member 50 is joined by butt fusion, the joining portion 54 of the pipe member 50 rises on the outer peripheral surface to form a bead. Therefore, the formed bead is removed and the pipe member 50 is removed. The joint 54 is smoothed.

  Next, the connecting member 10 is mounted on the smoothed joint portion 54. Specifically, the engaging portion 14 and the convex portion 52 are sandwiched from the upper and lower directions by the first and second half-cylinder portions 12a and 12b. Fit together. Then, for example, the first half-cylinder part 12 a and the second half-cylinder part 12 b are fixed by winding a vinyl tape around the circumference, and the connecting member 10 is attached to the duct 56.

  Subsequently, the distal end of the pipe line 56 to which the above-described connecting member 10 is attached is connected to the enlarged diameter reamer 94 attached to the drill rod 88. The propulsion hole 92 is enlarged by rotating the enlarged diameter reamer 94. Then, the drill rod 88 is pulled back, and the pipe line 56 is drawn into the enlarged propulsion hole 92.

  Then, the pipe member 50 is newly joined to the end of the pipe 56, the work of attaching the connecting member 10 to the joint portion 54, and the length distribution pipe 56 of the pipe member 50 to which the connecting member 10 is attached. The pull-in operation is repeated, and the pipeline 56 is laid over the entire length of the laying section.

  In this way, the connecting member 10 fits the engaging portions 14 and the respective convex portions 52 of the adjacent pipe members 50, and connects the pipe members 50 at the joint portion 54 of the pipe 56. In order to reinforce, the tensile force and bending deformation applied to the joint portion 54 when the pipe 56 is pulled in are reduced. Therefore, even if the joining of the pipe line members 50 in the joint portion 54 is weak, the pipe member 56 can be laid because the connecting member 10 holds the pipe line members 50 together. When the member 50 is joined, the time to wait until the joined portion 54 is sufficiently cooled and solidified can be shortened. Therefore, the work efficiency when laying the pipe line 56 is improved.

  Further, since the protruding portion 18 protruding radially outward from the outer peripheral surface of the cylindrical portion 12 is formed, when the pipe 56 is laid in the ground by the propulsion method, the soil is transferred from the surrounding soil to the protruding portion 18. Pressure is applied and the cylinder part 12 is tightened. Therefore, the connecting member 10 is fixed to the pipeline 56 without detaching from the pipeline 56.

  Furthermore, since the cylinder part 12 is formed of the first half cylinder part 12a and the second half cylinder part 12b divided in the circumferential direction, the cylinder part 12 can be attached to the joining part 54 so as to be sandwiched. Therefore, the connecting member 10 can be easily attached to the pipeline 56.

  Furthermore, since the tube wall of the cylindrical portion 12 is formed to have a thickness equal to or substantially equal to the height of the convex portion 52, when the locking portion 14 and the convex portion 52 are fitted together, the convex portion 52 becomes the cylindrical portion 12. The outer peripheral surface of the cylindrical portion 12 and the tip end surface of the convex portion 52 are flush with each other without protruding outward from the outer peripheral surface of the projection. Therefore, the insertion resistance of the pipe 56 is reduced, and the connecting member 10 and the pipe 56 are fixed with the maximum strength.

  Furthermore, since the end portion 16 of the cylindrical portion 12 is formed in a taper shape whose diameter decreases as the outer peripheral surface goes to the end, the insertion resistance of the pipe 56 can be reduced.

  As shown in FIG. 5, the locking portion 14 can also be formed as a recess having a shape that fits the convex portion 52 on the inner peripheral surface of the cylindrical portion 12. In this case, the convex portion 52 of the duct member 50 comes into contact with and fits into the locking portion 14.

  Moreover, as shown in FIG. 6, the opening part 20 can also be formed in the cylinder part 12. As shown in FIG. The opening 20 is formed, for example, by cutting out the tube wall of the cylindrical portion 12 in a rectangular parallelepiped shape, and is formed at each of the center in the tube axis direction and the both ends in the circumferential direction of the first half cylindrical portion 12a and the second half cylindrical portion 12b. Is done. Thereby, the air permeability of the cylinder part 12 is ensured, for example, when the pipe line member 50 is joined by fusion, solidification by cooling of the joining part 54 is promoted.

  Moreover, although the cylinder part 12 was formed by the two members divided | segmented into the circumferential direction, ie, the 1st half cylinder part 12a and the 2nd half cylinder part 12b, it is not limited to this. As shown in FIG. 7, the cylindrical portion 12 includes four members divided in the circumferential direction, for example, a first quarter cylindrical portion 12c, a second quarter cylindrical portion 12d, a third quarter cylindrical portion 12e, and a fourth quarter cylindrical portion 12f. Can also be formed. Each quarter tube part 12c, 12d, 12e, 12f is formed with a locking part 14 penetrating the tube wall in a rectangular parallelepiped shape that is long in the tube axis direction, for example. For example, the length of the locking portion 14 in the tube axis direction corresponds to twice the distance from the joint portion 54 of the duct member 50 to the convex portion 52. The convex portions 52 of the pipe members 50 adjacent to the inside of the locking portion 14 come into contact with each other, so that the convex portions 52 are locked. Thereby, the latching | locking part 14 and the convex-shaped part 52 can be fitted easily. In this case, the cylindrical portion 12 may be further covered with a protective cover 38 described later. Further, the four members may have a flat plate shape instead of an arc shape. Further, the combined state may be a polygonal shape instead of a perfect circle. In this way, even when the pipe diameters of the pipes 56 are different, it is possible to cope with one type of the cylindrical portion 12. Furthermore, although not shown, the cylindrical portion 12 can be formed by three members divided in the circumferential direction.

  In addition, although the some convex part 52 arranged in the circumferential direction of the pipe line member 50 and the some latching | locking part 14 arranged in the circumferential direction of the cylinder part 12 were formed, it is not limited to this. For example, a plurality of convex portions 52 arranged in the tube axis direction of the duct member 50 and a plurality of locking portions 14 arranged in the tube axis direction of the tube portion 12 may be formed.

  Moreover, although the latching | locking part 14 and the convex-shaped part 52 were formed in the same shape, it is not limited to this. It is also possible to set the locking portion 14 longer in the tube axis direction and insert a separate spacer (not shown) in the gap with the convex portion 52. Thereby, the position of the locking portion 14 in the tube axis direction can be changed.

  Furthermore, although the cylinder part 12 was formed with synthetic resins, such as hard vinyl chloride, it is not limited to this, It can also form with the biodegradable plastics which consist of polylactic acid resin etc. Since the connecting member 10 fulfills its function when the pipe 56 is laid, it can be said that it is environmentally desirable that the connecting member 10 be decomposed over time. Further, the connecting member 10 can be formed of fiber reinforced plastic reinforced with aramid fibers or the like. In this case, the tube wall of the cylindrical portion 12 can be made thin and high in strength.

  In addition, when the road surface can be excavated, the pipeline 56 can be laid by an open-cut method. A method for laying the pipeline 56 in the ground by the open-cut method using the above-described connecting member 10 will be described below.

  As shown in FIG. 8, first, along the laying section of the pipeline 56, the ground is excavated to a depth at which the pipeline 56 can be installed to provide an open groove 96. The excavated soil is carried out by a truck, for example. And the earth retaining sheet pile 98 for preventing the surrounding soil from collapsing is installed on the side surface of the cut groove 96. Next, also on the ground around the excavation groove 96, as described above, the connecting member 10 and the plurality of pipe members 50 are prepared, and the pipe line 56 to which the connecting member 10 is attached is formed. Subsequently, the pipe line 56 is disposed in the cut groove 96 and backfilled. Then, if necessary, the work of excavating the ground and extending the open groove 96, the work of newly joining the pipe member 50 to the end of the pipe 56 and mounting the connecting member 10 to the joint portion 54, and the connection The operation of burying the pipe 56 for the length of the pipe member 50 to which the member 10 is attached is repeated, the pipes 56 are sequentially buried, and the pipes 56 are laid over the entire length of the laying section. Thereby, the private use and opening of a road can be performed sequentially.

  A connecting member 10 according to another embodiment of the present invention shown in FIG. 9 further includes a flange portion 22 and an insertion hole 24. And the 1st half cylinder part 12a and the 2nd half cylinder part 12b are bolted by passing a volt | bolt through the insertion hole 24 of the flange part 22 formed in each, and fastening with a nut. Further, the protruding portion 18 is not formed on the cylindrical portion 12. Hereinafter, detailed description of the same parts as those of the connecting member 10 shown in FIG. 1 will be omitted.

  As shown in FIG. 9, the flange portion 22 is formed in a plate shape in which both ends in the circumferential direction of the half cylinder portions 12 a and 12 b extend outward in the radial direction. For example, one insertion hole 24 is formed in the flange portion 22 in the vicinity of both ends in the tube axis direction. By connecting the insertion hole 24 formed in the first half cylinder part 12a and the insertion hole 24 formed in the second half cylinder part 12b with a bolt and fastening the bolt with a nut, the first half cylinder part 12a and The second half cylinder portion 12b is fixed.

  Thus, the flange part 22 is formed in the cylinder part 12, and the 1st half cylinder part 12a and the 2nd half cylinder part 12b are bolted by the 1st half cylinder part 12a and 2nd with vinyl tape etc. Compared with the case where the half cylinder part 12b is fixed, the fixing of the connecting member 10 and the pipe 56 is strengthened. Further, the connecting member 10 is fixed to the duct 56 without being detached from the duct 56 without forming the protrusion 18 on the cylinder portion 12.

  Further, since the flange portion 22 extends in a plate shape outward in the radial direction, bending of the cylindrical portion 12 in the direction in which the flange portion 22 extends is limited. Therefore, when pulling the pipe line 56 with the connecting member 10 into the propulsion hole 72 from the ground or arranging it in the cut groove 74, it is possible to reduce the bending force applied to the joining portion 54 due to the height difference. Therefore, the pipe line can be laid without any problem even if the connection between the pipe line members 50 is weak.

  Although not shown, the locking portion 14 of the connecting member 10 shown in FIG. 9 can be formed as a recess having a shape that fits the convex portion 52 on the inner peripheral surface of the cylindrical portion 12. Furthermore, although illustration is abbreviate | omitted, the opening part 20 can also be formed in the cylinder part 12 of the connection member 10 shown in FIG.

  The connecting member 10 according to another embodiment of the present invention shown in FIGS. 10 to 13 is further divided in the tube axis direction. Moreover, the connection member 10 is further provided with the cylinder part connection means which connects the divided cylinder parts 12 so that the distance between the edge parts 16 of the cylinder part 12 can be adjusted. Hereinafter, detailed description of the same parts as those of the connecting member 10 shown in FIG. 1 will be omitted.

  As shown in FIG. 10, the cylinder part 12 has the 1st end cylinder part 12g, the 2nd end cylinder part 12h, the 3rd end cylinder part 12i, and the 4th end cylinder part 12j. Each end cylinder part 12g, 12h, 12i, 12j is formed, for example, by dividing the first half cylinder part 12a and the second half cylinder part 12b further in the tube axis direction at the center in the tube axis direction. Specifically, the first half cylinder part 12a (see FIG. 1) is divided into a first end cylinder part 12g and a third end cylinder part 12i, and the second half cylinder part 12b (see FIG. 1) It is divided into an end tube portion 12h and a fourth end tube portion 12j.

  An engaging portion 26 is formed as a cylindrical portion connecting means at a portion where the first and second end cylindrical portions 12g, 12h and the third and fourth end cylindrical portions 12i, 12j are divided. The engaging portion 26 is formed of a plurality of (three in this embodiment) concave and convex shapes. For example, the engaging portions 26a are formed in the first and second end tube portions 12g and 12h, and the outer edges thereof are recessed into a concave shape and a convex shape. Further, the third and fourth end tube portions 12i, 12j are formed with engaging portions 26b, and the inner edges thereof are recessed into a concave shape and a convex shape.

  The end tube portions adjacent to each other in the tube axis direction are connected by fitting the engaging portions 26 with each other. Further, the end tube portions adjacent in the tube axis direction are fixed by, for example, winding a vinyl tape in a circumferential shape.

  When the concave shape and the convex shape located at the end of each engaging portion 26a, 26b are fitted to each other, the distance between the end portions 16 of the cylindrical portion 12 is increased. Further, when the concave shape and the convex shape located at the other end are fitted to each other, the distance between the end portions 16 of the cylindrical portion 12 is shortened. That is, the distance between the end portions 16 of the cylindrical portion 12 can be adjusted by changing the concave and convex portions where the engaging portion 26a and the engaging portion 26b are fitted.

  As described above, the connecting member 10 has the cylindrical portion 12 divided in the tube axis direction, and the distance between the end portions 16 can be adjusted. Therefore, even when the position of the convex portion 52 changes when the pipe member 50 is joined, the locking portion 14 of the connecting member 10 can be fitted together.

  Further, as shown in FIGS. 11 and 12, bolt holes 28 and 30 can be formed as the tube portion connecting means instead of forming the engaging portion 26 in the tube portion 12.

  For example, the connecting member 10 shown in FIG. 11 has an O (O) ring-shaped bolt hole 28 protruding outward from the outer peripheral surface of the cylindrical portion 12.

  For example, one bolt hole 28 is provided on the outer peripheral surface of each of the end tube portions 12g, 12h, 12i, and 12j and at both ends in the respective circumferential directions. The bolt holes 28 are arranged in a straight line at the respective circumferential ends of the end tube portions 12g, 12h, 12i, and 12j. By connecting the bolt holes 28 of the respective end tube portions adjacent to each other in the tube axis direction with, for example, full screw bolts and fastening with double nuts, the first end tube portion 12g, the third end tube portion 12i, and the second end The cylinder part 12h and the fourth end cylinder part 12j are connected. And the distance between the edge parts 16 of the cylinder part 12 can be adjusted by adjusting the position of a nut and the length of a volt | bolt. Further, by bolting with all screw bolts and double nuts, the positions of the end tube portions 12g, 12h, 12i, 12j are not displaced in the tube axis direction.

  For example, the connecting member 10 shown in FIG. 12 has a bolt hole 30 that penetrates the tube wall of the cylindrical portion 12 in the tube axis direction.

  The bolt holes 30 penetrate, for example, the tube walls of the end tube portions 12g, 12h, 12i, and 12j in the tube axis direction, and are respectively provided at both ends in the circumferential direction. The bolt holes 30 are arranged in a straight line at the respective circumferential ends of the end tube portions 12g, 12h, 12i, and 12j so that the four bolt holes 30 penetrate the tube wall of the tube portion 12 in the tube axis direction. Provided. The first end cylinder part 12g, the third end cylinder part 12i, and the second end cylinder are connected by connecting the bolt holes 30 of the end cylinder parts adjacent to each other in the tube axis direction with, for example, full screw bolts and fastening with a double nut or the like. The part 12h and the fourth end cylinder part 12j are connected. And the distance between the edge parts 16 of the cylinder part 12 can be adjusted by adjusting the position of a nut and the length of a volt | bolt.

  In addition, when the bolt holes 28 and 30 are formed in the cylindrical portion 12 and the end cylindrical portions adjacent to each other in the tube axis direction are bolted to each other, the tube portion 12 is not divided at the center in the tube axis direction. The portion 12 may be divided by adding a length. By dividing the cylindrical portion 12 with a length, it is difficult for the divided portion of the cylindrical portion 12 and the joining portion 54 to coincide with each other, and the exposure of the joining portion 54 can be avoided.

  Moreover, the flange part 22 and the insertion hole 24 can also be formed in the cylinder part 12 of the connection member 10 shown to FIG. 11 and FIG. 12 (refer FIG. 13 and FIG. 14). Furthermore, although illustration is omitted, the locking portion 14 of the connecting member 10 shown in FIGS. 10 to 12 may be formed as a recess having a shape that fits the convex portion 52 on the inner peripheral surface of the cylindrical portion 12. it can. Furthermore, although not shown, the opening 20 may be formed in the cylindrical portion 12 of the connecting member 10 shown in FIGS.

  15 and 16, the connecting member 10 according to another embodiment of the present invention is formed so that the cylindrical portion 12 can be divided in the tube axis direction, and a male screw formed on the cylindrical portion 12 as the cylindrical portion connecting means. 32 and an internal thread 34 are further provided. The locking portion 14 is formed by recessing the inner peripheral surface of the cylindrical portion 12, and the convex portion 52 is brought into contact with and fixed to both side surfaces of the recess. Further, the protruding portion 18 is not formed on the cylindrical portion 12. Hereinafter, detailed description of the same parts as those of the connecting member 10 shown in FIG. 1 will be omitted.

  As shown in FIG. 15, the cylinder part 12 has the 1st cylinder part 12k and the 2nd cylinder part 12l. The first tube portion 12k and the second tube portion 121 are formed by dividing the tube portion 12 at the center in the tube axis direction, for example. Further, a male screw 32 and a female screw 34 are formed at the divided portions of the first tube portion 12k and the second tube portion 12l. For example, a male screw 32 is formed on the first cylindrical portion 12k, and a female screw 34 is formed on the second cylindrical portion 12l. The 1st cylinder part 12k and the 2nd cylinder part 121 are connected by screwing the external thread 32 and the internal thread 34 into it.

  In the pipe member 50, for example, a convex portion 52 protruding in a ring shape is formed on the outer side in the radial direction. Further, the tube portion 12 is formed with a locking portion 14 by recessing the center in the tube axis direction of the inner peripheral surface thereof. The locking part 14 is fixed so that the convex part 52 is brought into contact with both side surfaces of the depression and the convex part 52 is accommodated inside the depression.

  When such a connecting member 10 is attached to the pipe 56, as shown in FIG. 16, the male screw 32 and the female screw 34 face each other in advance to the adjacent pipe member 50. The first cylinder part 12k and the second cylinder part 12l are set. And the pipe line member 50 is joined. Then, the 1st cylinder part 12k and the 2nd cylinder part 12l are moved to the direction of the junction part 54. FIG. Then, the male screw 32 and the female screw 34 are screwed together, and the respective convex portions of the adjacent duct members are brought into contact with both inner side surfaces of the locking portion 14 to accommodate the convex portion 52 therein. To fix.

  Thus, the connecting member 10 is formed so that the cylindrical portion 12 can be divided only in the tube axis direction. Thereby, it is not necessary to fix the cylindrical portion 12 divided in the circumferential direction by, for example, winding a vinyl tape around the circumference. Further, it is not necessary to form the protrusion 18.

  Further, the connecting member 10 can adjust the distance between the end portions 16 of the cylindrical portion 12, that is, the distance in the tube axis direction of the locking portion 14 by adjusting the degree of screwing between the male screw 32 and the female screw 34. it can. Therefore, even if the position of the convex portion 52 changes due to the joining of the pipe members 50, the connecting member 10 abuts each convex portion 52 of each adjacent pipe member on both side surfaces of the locking portion 14. And can be housed inside the locking portion 14.

  A connecting member 10 according to another embodiment of the present invention shown in FIGS. 17 and 18 includes a notch 36 formed in the cylindrical portion 12 and having a substantially L-shape. Moreover, the cylinder part 12 is not divided | segmented neither in a pipe-axis direction nor in the circumferential direction. Hereinafter, detailed description of the same parts as those of the connecting member 10 shown in FIG. 1 will be omitted.

  As shown in FIG. 17, the cylindrical portion 12 includes, for example, a notch 36a in which the tube wall of the cylindrical portion 12 is notched a predetermined distance from the end portion 16 in the tube axis direction, and the direction is changed to a substantially right angle therefrom. A notch 36 having a substantially L shape is formed by the notch 36b further cut in the direction. For example, the circumferential width of the notch 36a is formed to be approximately equal to the circumferential length of the convex portion 52, and the width of the notch 36b in the tube axis direction is substantially equal to the length of the convex portion 52 in the tube axis direction. Formed equally. The notch 36 functions as the locking portion 14 in the connecting member 10 in order to prevent the joint portion 54 from being separated by locking the convex portion 52.

  The locking part 14 includes a locking part 14 a formed on one side in the circumferential direction of the cylindrical part 12 and a locking part 14 b formed on the opposite side. The locking portion 14 b has a longer notch 36 a than the locking portion 14 a, and the difference corresponds to twice the distance from the joint portion 54 of the conduit member 50 to the convex portion 52. Further, the locking portion 14a and the locking portion 14b have the same rotational direction in which the notch 36b extends.

  When such a connecting member 10 is attached to the pipe 56, the connecting member 10 is set in advance on the pipe member 50. Here, for example, one convex portion 52 that protrudes radially outward from the outer peripheral surface is formed at both ends of the pipe member 50 to be prepared. And the end of the pipe line member 50 adjacent to the end of the pipe line member 50 is abutted and joined so that each convex part 52 protrudes toward the other side of the circumferential direction.

  Then, after joining the pipe member 50, the connecting member 10 is moved toward the joining portion 54. Subsequently, as shown in FIG. 18A, the convex portion 52 of the duct member 50 is passed through the notch 36a. Then, as shown in FIG. 18B, the connecting member 10 is rotated in the circumferential direction, the convex portion 52 is passed through the notch 36b, and the convex portion 52 is locked. Then, the locking part 14 a locks the convex part 52 of the one pipe member 50 joined, and the locking part 14 b locks the convex part 52 of the other pipe member 50.

  Thus, the connecting member 10 is configured to lock the convex portions 52 of the adjacent pipe members by the locking portions 14a and the locking portions 14b, so that the pipe members in the joint portion 54 of the pipe 56 are connected. Reinforce the connection between 50.

  Further, the connecting member 10 does not divide the cylindrical portion 12 in the tube axis direction or the circumferential direction. Thereby, it is not necessary to fix the divided cylindrical portions 12 to each other. Further, it is not necessary to form the protrusion 18.

  In addition, although the width | variety of the tube axis direction in the notch 36b was formed in the length substantially equal to the length of the convex part 52 in the tube axis direction, it is not limited to this. For example, as shown in FIG. 19, the width of the notch 36b in the tube axis direction is formed longer than the length of the convex portion 52 in the tube axis direction, and the width of the notch 36b becomes shorter as it extends in the circumferential direction. You may form so. Thereby, even if the position of the convex part 52 changes by joining of the pipe line member 50, the connection part 10 can be rotated in the circumferential direction and the convex part 52 can be latched by the notch 36b.

  Further, in the connecting member 10 shown in FIG. 19, for example, the side surface of the notch 36b opposite to the notch 36a may be formed in a stepped shape or a shape in which irregularities are alternately arranged like sawtooth teeth. Furthermore, the convex part 52 is formed in the shape which opposes this. This prevents the connecting member 10 from rotating in the opposite direction and the convex portion 52 locked by the notch 36b from coming off.

  The connecting member 10 according to another embodiment of the present invention shown in FIGS. 20 to 22 further includes a protective cover 38, and the cylindrical portion 12 is covered by the protective cover 38. Further, the protruding portion 18 is not formed on the cylindrical portion 12. Hereinafter, detailed description of the same parts as those of the connecting member 10 shown in FIG. 1 will be omitted.

  As shown in FIG. 20, the protective cover 38 is formed in a cylindrical shape by a short pipe such as a vinyl chloride pipe, and ensures the rigidity of the cylindrical portion 12. The protective cover 38 has an inner diameter substantially equal to the outer diameter of the cylindrical portion 12 except for one end thereof, and covers the cylindrical portion 12. One end of the protective cover 38, for example, the inner peripheral surface on the propulsion direction side of the pipe 56, protrudes inward in the radial direction and is formed smaller than the outer diameter of the cylindrical portion 12. Moreover, the outer peripheral surface of the one end is formed in a taper shape whose diameter is reduced toward the end.

  When such a protective cover 38 is attached to the cylindrical portion 12, the protective cover 38 is set in advance on the pipe line member 50. Then, after the conduit member 50 is joined, the protective cover 38 may be moved toward the tubular portion 12 covering the joined portion 54 to cover the tubular portion 12.

  Thus, the rigidity of the cylindrical portion 12 of the connecting member 10 is ensured by the protective cover 38. Therefore, when pulling the pipe line 56 with the connecting member 10 into the propulsion hole 72 from the ground or arranging it in the cut groove 74, it is possible to reduce the bending force applied to the joining portion 54 due to the height difference. Therefore, the pipe 56 can be laid without any problem even if the joint between the pipe members 50 is weak.

  In addition, since the inner peripheral surface at one end of the protective cover 38 is formed to be smaller than the outer diameter of the cylindrical portion 12, even when an insertion resistance occurs in the protective cover 38 when the pipe 56 is laid, the protective cover 38. Since the inner peripheral surface of the cylindrical member and the end portion 16 of the cylindrical portion 12 are in contact with each other, the protective cover 38 is not detached from the cylindrical portion 12. Alternatively, when the pipe 56 is lowered from the ground to the propulsion hole 72 or the cut groove 74 by using the protective cover 38 in the reverse direction, the joint portion 54 is protected from bending force, and the pipe 56 is formed in the ground. When retracting, the protective cover 38 may be removed by insertion resistance so that the protective cover 38 can be reused.

  Furthermore, by forming the outer peripheral surface of the end portion on the propulsion direction side of the protective cover 38 into a tapered shape that decreases in diameter toward the end, the insertion resistance of the conduit 56 can be reduced.

  Further, by covering the tube portion 12 with the protective cover 38, the connecting member 10 can be fixed to the pipe line 56 without forming the projection portion 18 on the tube portion 12.

  As shown in FIG. 21, the protective cover 38 can also be formed by a protective cover 38a and a protective cover 38b divided in the circumferential direction. The protective cover 38a and the protective cover 38b are formed in, for example, a substantially halved cylindrical shape, and form a cylindrical protective cover 38 by combining them. The inner peripheral surfaces of both ends of the protective cover 38a and the protective cover 38b protrude, for example, radially inward and are smaller than the outer diameter of the cylindrical portion 12. Moreover, the outer peripheral surface of the both ends is formed in the taper shape diameter-reduced as it goes to an end. Furthermore, a projection 40 is formed at the center in the circumferential direction of the protective cover 38a and the protective cover 38b. The protrusion 40 is formed in a trapezoidal plate shape that extends over the entire length of the protective cover 38a and the protective cover 38b in the tube axis direction, for example. In such a case, it attaches to the cylinder part 12 so that it may be pinched | interposed by the protective cover 38a and the protective cover 38b, for example, it winds and joins a vinyl tape around the circumference, etc., and it fixes to the cylinder part 12. Therefore, the cylindrical portion 12 can be covered with the protective cover 38 without setting the protective cover 38 on the duct member 50 in advance.

  Furthermore, as shown in FIG. 22, the protective cover 38a and the protective cover 38b can be bolted. The flange portions 42 are formed by extending both ends in the circumferential direction of the protective cover 38a and the protective cover 38b outward in the radial direction in a plate shape. In the flange portion 42, for example, one insertion hole 44 is formed in the vicinity of both ends in the tube axis direction. The inner peripheral surfaces of both ends of the protective cover 38a and the protective cover 38b protrude, for example, radially inward and are smaller than the outer diameter of the cylindrical portion 12. Moreover, the outer peripheral surface of the both ends is formed in the taper shape diameter-reduced as it goes to an end. In such a case, the insertion hole 44 formed in the protective cover 38a and the insertion hole 44 formed in the protective cover 38b are connected with a bolt, and the bolt is fastened with a nut to be fixed to the cylinder portion 12. .

  Further, as shown in FIG. 23, a plurality of (six in this embodiment) slits 46 may be provided in the protective cover 38. The slit 46 is formed, for example, by cutting the outer peripheral surface of the protective cover 38 into a strip shape except for one end in the tube axis direction. By providing the slit 46 in the protective cover 38, even if a portion protruding from the outer peripheral surface of the cylindrical portion 12 such as the protruding portion 18 or the flange portion 20 is formed on the cylindrical portion 12, it can be accommodated inside the slit 46. . Further, the slit 46 ensures air permeability of the connecting member 10. Furthermore, the slit 46 may be formed in a substantially halved cylindrical protective cover 38a and protective cover 38b (see FIGS. 21 and 22) formed by dividing the protective cover 38 in the circumferential direction.

  Although not shown in the drawing, a rubber plate or the like is inserted between the inner peripheral surface of the protective cover 38 and the outer peripheral surface of the cylindrical portion 12, so that the inner peripheral surface of the protective cover 38 and the outer peripheral surface of the cylindrical portion 12 are It is also possible to fill the gap. Thereby, fixation with the protective cover 38 and the cylinder part 12 can be strengthened more.

  In each of the above-described embodiments, the pipe members 50 are bonded to each other by butt fusion, and the connecting member 10 is attached to the joint portion 54. However, the present invention is not limited to this.

  For example, as shown in FIG. 24, the connecting member 10 can be attached to a pipe line member 50 joined by EF joining. The pipe 56 in which the pipe member 50 is joined by EF joining is covered with an EF socket 58 at the joint 54. Therefore, for example, the position of the inner peripheral surface of the cylindrical portion 12 that contacts the EF socket 58 is recessed in accordance with the shape of the EF socket 58, and further, a hole that matches the shape of the terminal 60 formed in the EF socket 58 is provided. It is good to form. The outer peripheral surface of the cylindrical portion 12 may be formed in a streamline shape that rises in accordance with the shape of the EF socket 58.

  For example, the connecting member 10 is attached to the pipeline 56 so that the EF socket 58 of the joint portion 54 is sandwiched between the first half-cylinder part 12a and the second half-cylinder part 12b formed in a substantially half-divided cylindrical shape. In addition, since the outer peripheral surface of the cylinder part 12 is a shape which rises, it is not necessary to form the projection part 16 in the cylinder part 12. FIG. Further, the cylindrical portion 12 that accommodates the EF socket 58 can be further covered with the protective cover 38 described above.

  Further, in each of the above-described embodiments, the pipe member 50 is formed with the convex portion 52 protruding outward from the outer peripheral surface in the radial direction. Moreover, although the latching | locking part 14 was formed in the hollow which has the shape which fits the convex part 52 in the internal peripheral surface of the cylinder part 12, or the hole which penetrates the tube wall of the cylinder part 12, it is not limited to this. . For example, as shown in FIG. 25, a concave portion 62 can be formed in the duct member 50. The concave portion 62 may be formed by, for example, a hole formed in a perforated pipe, in which the pipe wall of the duct member 50 is recessed or penetrates the pipe wall. And the latching | locking part 14 which has a shape fitted in the recessed part 62 in the inner peripheral surface of the cylinder part 12 is formed in the cylinder part 12 so that it may protrude in the radial inside from the inner peripheral surface. The locking portion 14 is, for example, a cylindrical protrusion, and fits with the concave portion 62 formed in the pipe line member 50. The concave portion 62 may be formed by cutting out the pipe wall of the pipe line member 50.

  Moreover, for example, as shown in FIG. 26, the convex portion 52 or the concave portion 62 does not necessarily have to be formed in the conduit member 50. In such a case, as shown in FIG. 26 (A) and FIG. 26 (B), the cylindrical portion 12 is provided with a ridge 48 protruding from its inner peripheral surface and meshing with the outer peripheral surface of the duct member 50. It is good to form. The protrusion 48 functions as the locking portion 14 in the connecting member 10 in order to prevent the joint portion 54 from being separated by meshing with the outer peripheral surface of the duct member 50. For example, the cross section of the ridge 48 is formed in a right triangle shape as shown in FIG. The side that rises at right angles and the side that rises diagonally in the ridges 48 are alternately changed in position for each of the ridges 48 arranged in the tube axis direction of the tube portion 12, and are alternately inclined with respect to the tube axis direction of the tube portion 12. Change.

  In each of the above-described embodiments, the protrusion 18 is formed in a plate shape, but is not limited thereto.

  For example, the connecting member 10 shown in FIG. 27 has a hemispherical protrusion 18. For example, the six projecting portions 18 are arranged on a straight line in the circumferential direction of the cylindrical portion 12 and project outward from the center in the tube axis direction of the cylindrical portion 12 in the radial direction. Thereby, the area which the protrusion part 18 and the surrounding soil contact | abut increases, and it is easy to maintain fixation with the connection member 10 and the pipe line 56. FIG. Further, even when a rotational force is applied to the pipeline 56 due to earth pressure, the insertion resistance of the pipeline 56 can be reduced.

  Further, for example, the connecting member 10 shown in FIG. 28 has an expanded protrusion 18. When the protruding portion 18 receives an external force of a certain level or more, a thin portion that is in contact with the cylindrical portion 12 is broken and separated from the cylindrical portion 12. Thereby, for example, when the projection 18 receives various resistances such as a frictional force, the projection 18 and the cylindrical portion 12 are separated, and the insertion resistance of the conduit 56 can be reduced.

  Further, the protrusion 18 may be formed of an elastic body such as rubber, and may be appropriately deformed according to the insertion resistance of the duct 56.

  Furthermore, the above-described protrusions 18 can be appropriately combined to form the cylindrical portion 12.

  Furthermore, in each of the above-described embodiments, the inner diameter of the cylindrical portion 12 is set to be equal to or substantially equal to the outer diameter of the pipe member 50, and is formed so as to cover the entire circumference of the joint portion 54. It is not limited.

  For example, the cylindrical portion 12 may be formed by the first semi-cylindrical portion 12a and the second semi-cylindrical portion 12b whose length in the circumferential direction is shorter than the length of the half circumference of the pipe line member 50. In such a case, when the joint portion 54 is covered, gaps are formed at both ends in the circumferential direction of the first half tube portion 12a and the second half tube portion 12b. Thereby, the air permeability of the connecting member 10 is ensured.

  Further, for example, a gap may be formed on the tube wall of the tube portion 12 over a certain distance in the circumferential direction and over the entire length in the tube axis direction so that the cross section of the tube portion 12 is substantially C-shaped. In such a case, in order to facilitate attachment to the pipe 56, the cylindrical portion 12 is formed of a high-strength elastic body such as a thermoplastic resin having moderate flexibility such as polypropylene or a steel material. Good. When the connecting member 10 is attached to the pipe 56, the diameter of the cylindrical portion 12 is increased and the connecting member 10 is attached so as to be fitted into the pipe 56.

  In any of the above-described embodiments, the convex portion 52 is heat-sealed at a factory or the like and integrated with the conduit member 50, but is not limited thereto. For example, the convex portion 52 molded separately can be attached to the pipe member 50 later by adhesive bonding or the like. Thereby, even after the pipe member 50 is joined, the position of the convex portion 52 can be determined, so that the position of the convex portion 52 and the position of the locking portion 14 of the connecting member 10 can be reliably matched. .

  In each of the above embodiments, the pipe member 50 is fused to form the pipe 56, but the present invention is not limited to this. The joining of the pipe members 50 includes not only fusion bonding but also bonding the ends of the pipe members 50 or simply abutting the ends of the pipe members 50 together. When the water tightness is not required for the pipe 56, the ends of the pipe members 50 may be simply abutted and joined, and the connecting member 10 may be attached to the joint portion 54.

  In each of the above-described embodiments, the cylindrical portion 12 is formed by injection molding and the locking portion 14 and the protruding portion 16 are formed. However, the present invention is not limited to this.

  In each of the above-described embodiments, the connecting member 10 is used when the pipeline 56 is laid in the ground by the propulsion method or the open-cut method, but the present invention is not limited to this, and the pipeline 56 is connected to the existing pipeline. It can also be used when inserting.

  In addition, all the specific numbers of the dimensions raised above are merely examples, and can be appropriately changed as necessary.

(A) is a perspective view which shows the connection member of one Example of this invention, (B) is sectional drawing of the pipe-axis direction of the connection member of (A). It is an illustration figure which shows a mode that the connection member of FIG. 1 is mounted | worn on a pipe line. It is an illustration figure which shows a mode that the pipe line equipped with the connection member of FIG. 1 is laid by the propulsion method. It is an illustration figure which shows a mode that the pipe line equipped with the connection member of FIG. 1 is laid by the propulsion method. (A) is a perspective view which shows the connection member of other one Example of this invention, (B) is sectional drawing of the pipe-axis direction of the connection member of (A). It is a perspective view which shows the connection member of other one Example of this invention. It is a perspective view which shows the connection member of other one Example of this invention. It is an illustration figure which shows a mode that the pipe line which mounted | wore with the connection member of FIG. (A) is a perspective view which shows the connection member of other one Example of this invention, (B) is a top view which shows the end surface side of the connection member of (A). It is an illustration figure which shows a mode that the connection member of other one Example of this invention is mounted in a pipe line. It is a perspective view which shows the connection member of other one Example of this invention. It is a perspective view which shows the connection member of other one Example of this invention. It is a perspective view which shows the connection member of other one Example of this invention. It is a perspective view which shows the connection member of other one Example of this invention. It is a perspective view which shows the connection member of other one Example of this invention. It is an illustration figure which shows a mode that the connection member of one Example of FIG. 15 is mounted | worn with a pipe line. It is a perspective view which shows the connection member of other one Example of this invention. (A) is an illustration figure which shows a mode that a connection member is moved to a pipe-axis direction in order to attach the connection member of FIG. 17 to a pipe line, (B) is an illustration figure which shows a mode that it rotates in the circumferential direction. It is. It is a perspective view which shows the connection member of other one Example of this invention. It is an illustration figure which shows a mode that a protective cover is mounted | worn with the cylinder part of the connection member of other one Example of this invention. It is an illustration figure which shows a mode that a protective cover is mounted | worn with the cylinder part of the connection member of other one Example of this invention. It is an illustration figure which shows a mode that a protective cover is mounted | worn with the cylinder part of the connection member of other one Example of this invention. It is an illustration figure which shows a mode that a protective cover is mounted | worn with the cylinder part of the connection member of other one Example of this invention. It is an illustration figure which shows a mode that the connection member of other one Example of this invention is mounted | worn with the pipe line which fused the pipe line member by EF joining. It is an illustration figure which shows a mode that the connection member of other one Example of this invention is mounted in a pipe line. (A) is a perspective view which shows the connection member of other one Example of this invention, (B) is sectional drawing of the pipe-axis direction of the connection member of (A), (C) is one of a protruding item | line. It is sectional drawing of (A) which shows a part. It is a perspective view which shows the connection member of other one Example of this invention. It is a perspective view which shows the connection member of other one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Connecting member 12 ... Tube part 14 ... Locking part 16 ... End part 18 ... Projection part 20 ... Opening part 22 ... Flange part 24 ... Insertion hole 26 ... Engagement part 28,30 ... Bolt hole 32 ... Male screw 34 ... Female screw 36 ... Abutting part 38 ... Protective cover 50 ... Pipe line member 52 ... Convex part 54 ... Joint part 56 ... Pipe line 58 ... EF socket 62 ... Concave part

Claims (9)

A connecting member that is mounted so as to straddle the joint portion of the conduit formed by joining the ends of the conduit member,
A connecting member comprising: at least a cylindrical portion that covers the joining portion; and a locking portion that is formed on the tubular portion and that prevents the joining portion from being separated. The pipe member is formed with a convex portion protruding outward in the radial direction or a concave portion recessed inward,
The connecting member according to claim 1, wherein the locking portion is fitted to the convex portion or the concave portion.   The connecting member according to claim 1, further comprising a protrusion formed on the cylindrical portion and protruding outward in the radial direction.   The connecting member according to claim 1, wherein the cylindrical portion is formed by a plurality of members divided in the circumferential direction. The cylindrical portion is formed to be divisible in the tube axis direction,
The connecting member according to any one of claims 1 to 4, further comprising a cylinder connecting means for connecting the divided cylinders so that the distance between the ends of the cylinders can be adjusted. The locking portion penetrates the cylindrical portion,
The connecting member according to claim 2, wherein a thickness of the cylindrical portion is equal to or substantially equal to a height of the convex portion.   The connection member according to claim 1, further comprising a protective cover that covers the cylindrical portion. A pipe laying method in which a pipe line is laid in the ground by a propulsion method using the connecting member according to claim 1,
(A) forming a small-diameter propulsion hole over the entire length of the laying section of the pipeline,
(B) joining pipeline members to form the pipeline;
(C) A connecting member is mounted so as to straddle the joint portion of the pipe line,
(D) drawing the pipe line with the connecting member attached in the step (c) into the propulsion hole by a predetermined distance; and (e) repeating the steps (b) to (d) to lay the pipe line. A pipe laying method that lays the entire length of the section. A pipe laying method that uses the connecting member according to any one of claims 1 to 7 to lay a pipe in the ground by an open-cut method,
(A) excavating the ground along the laying section of the pipe line to form an open groove,
(B) joining pipeline members to form the pipeline;
(C) A connecting member is mounted so as to straddle the joint portion of the pipe line,
(D) The pipe line on which the connecting member is mounted in the step (c) is buried in a predetermined distance in the cut groove, and (e) the steps (a) to (d), or A pipe laying method in which the steps (b) to (d) are repeated to lay the pipe over the entire length of the laying section.

Images