Pipe fittings

Abstract

To achieve a pipe material connector, etc. that enable a significant reduction in working time by reducing the time and effort required by an operator even when a corrugated pipe material to be passed through a through-hole in a structure to be buried underground is fixed by sandwiching the corrugated pipe material between locking bodies that are screwed together with an outer circumference of the corrugated pipe material.SOLUTION: A locking body 11 includes: an outer cylinder part 12 that is screwed with an outer circumferential surface side of a corrugated pipe material; a flange part 13 formed on a tip side of the outer cylinder part 12; an engagement part formed on the inner side of the outer cylinder part 12 and spiraling with spiral irregularities on the outer circumferential surface side of the corrugated pipe material; and a packing part 15 attached to the flange part 13. The locking body 11 consists of a first partial locking body 11a and a second partial locking body 11b separable from each other. The first partial locking body 11a and the second partial locking body 11b are fitted to each other and screwed together on the outer circumferential surface of the corrugated pipe material.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a pipe connector or the like that connects and fixes a corrugated pipe to a through-hole formed in a structure buried underground. [Background technology]

[0002] Corrugated rigid synthetic resin pipes (hereinafter referred to as corrugated pipes or FEP (Flexible Electric Pipe)) are used as pipes that can be buried underground with communication cables, power supply cables, etc. inserted inside.

[0003] For example, in a handhole 1a, a plurality of through holes 2 for inserting a corrugated pipe material are provided in the portion to be buried in the ground, as shown in Fig. 14. Conventionally, a pipe material connector has been used to connect and fix the corrugated pipe material to the wall surrounding the through holes 2 of the handhole 1a (for example, Patent Document 1).

[0004] Also, at construction sites, underground beam construction is being carried out, in which reinforcing bars 3 are inserted between the foundations of the building and solidified with concrete, as shown in Figure 15. In underground beam construction, pipe materials such as rigid polyvinyl chloride pipes or gas pipes are installed in a direction that intersects with the longitudinal direction of the underground beams 1b, thereby securing sleeves before pouring concrete between the wooden frames. After that, concrete is poured between the wooden frames to form through-holes 2 in the underground beams 1b.

[0005] Conventionally, when connecting and fixing a corrugated pipe material 5 to a through hole 2 in an underground beam 1b, a waterproof cast iron pipe 100 as shown in Fig. 16 has been used, and a dissimilar joint 102 has been used to connect the waterproof cast iron pipe 100 to the corrugated pipe material 5. In contrast, the present applicant has proposed a pipe connector that does not use a dissimilar joint 102 in the underground beam 1b, does not require skilled techniques for waterproofing treatment, and can be installed in a short time.

[0006] As shown in Fig. 17, a conventional pipe connector 210 clamps the wall surrounding a through-hole 2 formed in structures 1a and 1b buried underground between a locking body 211 and a mouth body 221, connecting and fixing a corrugated pipe 5. In Fig. 17, the right side of the paper is the outside (underground) of the structures 1a and 1b, and the left side of the paper is the inside of the structures 1a and 1b. The corrugated pipe 5 has spirally formed irregularities on its inner and outer peripheral surfaces.

[0007] The locking body 211 has a cylindrical outer tube portion 212, which is screwed onto the outer periphery of the corrugated tubing 5. When the locking body 211 is rotated, the locking body 211 moves in the axial direction of the corrugated tubing 5. The mouthing body 221 has a cylindrical inner tube portion 222, which is inserted into the corrugated tubing 5 from the tip side. As a result, the mouthing body 221 is screwed onto the inner periphery of the corrugated tubing 5, and the corrugated tubing 5 is prevented from slipping out of the tubing.

[0008] After attaching the mouse body 221 to the tip of the corrugated tubular material 5, when the lock body 211 is tightened toward the mouse body 221, the wall surrounding the through hole 2 is sandwiched between the flange portion 213 of the lock body 211 and the inner flange portion 223 of the mouse body 221, and the corrugated tubular material 5 is connected and fixed to the through hole 2. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-90884 Summary of the Invention [Problem to be solved by the invention]

[0010] Meanwhile, for example, at an underground beam construction site, as shown in Fig. 18, underground beams 1ba and 1bb are adjacent to each other with a certain distance between them, and a corrugated pipe 5 is passed through a through-hole 2 in the underground beam 1ba and then connected and fixed to the through-hole 2 in the underground beam 1bb. When using such a connection, a conventional pipe connector 210 uses two locking bodies 211 (locking bodies 211a and 211b) to clamp the wall around the through-hole 2 in the underground beam 1ba through which the corrugated pipe 5 is to pass, thereby fixing the corrugated pipe 5.

[0011] However, when the applicant listened to opinions and conducted an investigation on site, it was found that with the conventional method of fixing the corrugated pipe material 5 between the locking bodies 211, the locking bodies 211a and 211b had to be rotated and moved a considerable distance from the tip of the corrugated pipe material 5 to a position where they could clamp the underground beam 1ba, which lengthened the work time required to screw the outer tube portion 212 onto the outer circumference of the corrugated pipe material 5, and it took a considerable amount of effort and time to complete the fixing of the corrugated pipe material 5.

[0012] The present invention has been made in consideration of the above circumstances, and aims to realize a pipe connector or the like that can reduce the labor required by the worker and significantly shorten the work time, even when a corrugated pipe that is to be passed through a through-hole in a structure buried underground is clamped and fixed between locking bodies that screw onto the outer periphery of the corrugated pipe. [Means for solving the problem]

[0013] The pipe connector of the present invention connects and fixes a corrugated pipe having spirally formed irregularities on at least its outer surface to a through hole formed in a structure buried underground by using two locking bodies to clamp the structure around the through hole.

[0014] The locking body comprises an outer tubular portion that screws onto the outer circumferential surface of the corrugated tubing, a flange portion formed at the tip of the outer tubular portion, an engagement portion formed inside the outer tubular portion that screws onto the spiral concave and convex portion on the outer circumferential surface of the corrugated tubing, and a packing portion attached to the flange.In the present invention, the locking body comprises a plurality of separable partial locking bodies, which are attached to the outer circumferential surface of the corrugated tubing in a fitted state and screwed together.

[0015] In the present invention, the multiple partial locking bodies may be configured to include a first partial locking body and a second partial locking body. In this case, the size of one of the partial locking bodies may be larger than the size of the other partial locking body. Also, it is preferable that the outer cylindrical portion of the first block body and the outer cylindrical portion of the second block body are divided in the circumferential direction of the outer cylindrical portion.

[0016] The present invention may employ a configuration having a two-layer region in which the first partial locking body and the second partial locking body overlap one another so that one is on the outside and the other is on the inside in the radial direction of the outer cylindrical portion when the first partial locking body and the second partial locking body are fitted together.

[0017] In the present invention, a configuration may be adopted in which the two-layer region is provided with a locking portion that restricts the first partial locking body and the second partial locking body from rotating in a direction that separates them.

[0018] In the present invention, a configuration may be adopted in which a notch is provided in the flange portion of the first partial locking body to increase flexibility.

[0019] The present invention may employ a configuration in which a belt is provided to bind the peripheries of the plurality of partial locking bodies that are fitted together, and the partial locking bodies are provided with insertion portions through which the belt is passed.

[0020] In the present invention, the corrugated pipe material has spirally formed irregularities on its inner surface as well, and may further include a configuration including an inner tube portion that screws into the inner surface side of the corrugated pipe material, an inner flange portion formed at the tip side of the inner tube portion, a second engaging portion formed on the outside of the inner tube portion that screws into the spiral irregularities on the inner surface side of the corrugated pipe material, and a second gasket portion attached to the inner flange portion. [Effects of the Invention]

[0021] In the present invention, the locking body is made up of a plurality of separable partial locking bodies, which are fitted together and attached to the outer circumferential surface of the corrugated pipe material and screwed together.

[0022] In the present invention, even when the corrugated pipe material is fixed by sandwiching it between locking bodies, the worker can attach the locking bodies simply by fitting multiple partial locking bodies into the desired positions of the corrugated pipe material, and then start tightening by screwing them together from that attached position.

[0023] According to the present invention, there is no need to rotate and move the locking body from the tip of the corrugated pipe material to the position where the structure is clamped, which reduces the worker's workload and significantly shortens the work time. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 shows a state in which a corrugated pipe material is inserted into a through-hole formed in a structure buried underground, and then the partial locking body of the pipe material connector of the embodiment is fitted and attached in a position that sandwiches the through-hole. [Figure 2] FIG. 2 is a vertical cross-sectional view showing a state in which the tightening of the outer cylindrical portion of the locking body has been completed from the state shown in FIG. [Figure 3] FIG. 3 is a perspective view of the locking body of the pipe connector of the embodiment, seen from the front, top, and left side, with the first partial locking body and the second partial locking body fitted together. [Figure 4]FIG. 4 is a perspective view of the locking body of the pipe connector of the embodiment, seen from the back, top, and left side, with the first partial locking body and the second partial locking body fitted together. [Figure 5] FIG. 5 is a view of the locking body of the pipe connector of the embodiment, viewed from the rear, with the first partial locking body and the second partial locking body separated. [Figure 6] FIG. 6 is a view of the locking body of the pipe connector of the embodiment, viewed from the rear, with the first partial locking body and the second partial locking body fitted together. [Figure 7] FIG. 7 is a view of the locking body of the pipe connector of the embodiment, viewed from the front, with the first partial locking body and the second partial locking body fitted together. [Figure 8] FIG. 8 is a plan view of the locking body of the pipe connector of the embodiment, with the first partial locking body and the second partial locking body fitted together. [Figure 9] FIG. 9 is a cross-sectional view taken along line AA in FIG. [Figure 10] FIG. 10 is an enlarged view of the area circled in FIG. [Figure 11] Figures 11(a) to (d) are diagrams explaining the procedure for wrapping the winding locking material around the corrugated pipe material, inserting it into the through-hole, engaging the first partial locking body with the second partial locking body, and passing a belt through the insertion portion to secure it. [Figure 12] Regarding the pipe connector of the first modified embodiment, Figure 12(a) is a diagram showing the state in which caulking material is injected from an injection port provided in the intended injection section, and Figure 12(b) is a side view of the state in which caulking material has been filled between the wrapping locking material and the locking body. [Figure 13] Regarding the pipe connector used in the second modified example of the embodiment, FIG. 13(a) is a front view of the mouse body, and FIG. 13(b) is a longitudinal cross-sectional view of the mouse body. [Figure 14] FIG. 14 is a perspective view of a hand hole in which a plurality of through holes are formed, viewed obliquely from above. [Figure 15] FIG. 15 is a perspective view of an underground beam in which a plurality of through holes are formed, viewed obliquely from above. [Figure 16] FIG. 16 is a diagram illustrating a conventional pipe connection structure using a waterproof cast iron pipe and a dissimilar joint. [Figure 17] Figure 17 shows the configuration of a conventional pipe connector, viewed from the side, in which the locking body is screwed onto the outer surface of the corrugated pipe, the tip of the corrugated pipe is inserted into a through-hole in a structure, and the mouth body is screwed onto the inner surface of the corrugated pipe. [Figure 18] FIG. 18 is a diagram showing a connection configuration using a conventional pipe connector in a location where two underground beams are adjacent to each other with a certain distance between them. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following embodiments are merely examples of the present invention and are not intended to limit the scope of the present invention, its applications, or its uses.

[0026] As shown in Fig. 1, the pipe connector 10 of this embodiment connects and fixes a corrugated pipe 5, which has spirally formed irregularities on its inner and outer peripheral surfaces, to a through-hole 2 formed in an underground beam 1b using two locking bodies 11. In this embodiment, the locking bodies 11 consist of two partial locking bodies: a first partial locking body 11a and a second partial locking body 11b. The first partial locking body 11a and the second partial locking body 11b are fitted together, attached to the outer peripheral surface of the corrugated pipe 5, and screwed together.

[0027] The pipe connector 10 can be suitably used in a location where underground beams 1ba and 1bb are adjacent to each other with a certain distance between them, as shown in FIG. 18, and where it is required to pass a corrugated pipe 5 through a through-hole 2 in the underground beam 1ba and then connect it to the through-hole 2 in the underground beam 1bb. By using the pipe connector 10, the first partial locking body 11a and the second partial locking body 11b are fitted into positions that sandwich the through-hole 2, and then tightened, so that the corrugated pipe 5 can be fixed to the wall surrounding the through-hole 2 in the underground beam 1ba in a short time. Below, the underground beam 1b and the corrugated pipe 5 will be described, and then the configuration of the locking body 11 will be described.

[0028] [About underground beams] The underground beam 1b is a reinforced concrete beam formed by underground beam construction. In FIG. 1, the corrugated pipe material 5 is surrounded by soil and buried underground. The width of the underground beam 1b is, for example, 50 cm to 2 m, but may exceed 2 m depending on the building. A linear through-hole 2 is provided in the underground beam 1b. The through-hole 2 is formed by inserting a pipe material such as a PVC pipe between the wooden frames before pouring concrete during underground beam construction.

[0029] [About corrugated pipes] In this embodiment, a moderately flexible FEP pipe is used as the corrugated pipe 5. The outer diameter of the corrugated pipe 5 is smaller than the inner diameter of the through-hole 2. Regular spiral irregularities are formed on both the outer and inner peripheral surfaces of the corrugated pipe 5. Specifically, as shown in FIGS. 1 and 2, an outer peripheral spiral irregularity 6a is formed on the outer peripheral surface of the corrugated pipe 5, and an inner peripheral spiral irregularity 6b is formed on the inner peripheral surface of the corrugated pipe 5, each in a spiral shape.

[0030] The corrugated tubing 5 is made of a soft or hard resin having appropriate flexibility, and various materials such as polyethylene, polycarbonate, ABS, polypropylene, etc. Various cables are inserted inside the corrugated tubing 5. For example, communication cables through which optical or electrical signals flow, power supply cables through which electric power is transmitted, etc.

[0031] [Rock body configuration] As shown in Figures 3 to 8, the locking body 11 includes an outer cylinder portion 12 consisting of a first partial outer cylinder portion 12a and a second partial outer cylinder portion 12b, a flange portion 13 consisting of a first partial flange portion 13a and a second partial flange portion 13b, a packing portion 15 consisting of a first partial packing portion 15a and a second partial packing portion 15b, and a crushable packing portion 16 consisting of a first partial crushable packing portion 16a and a second partial crushable packing portion 16b.

[0032] All of these components can be separated. That is, when the locking body 11 is separated into the first partial locking body 11b and the second partial locking body 11b, each component is also separated into a first portion and a second portion. Furthermore, when the first partial locking body 11b and the second partial locking body 11b are mated together, the first portion and the second portion become a continuous, integrated component.

[0033] The outer tubular portion 12 is a member formed in a cylindrical shape when the first partial outer tubular portion 12a and the second partial outer tubular portion 12b are fitted together. The outer tubular portion 12 has an inner diameter slightly larger than the outer diameter of the corrugated tubing 5.

[0034] The flange portion 13 is a disc-shaped member that extends outward from the entire circumference of the tip of the outer tube portion 12. An annular packing portion 15 is bonded to the tip surface of the flange portion 13 with an adhesive or the like. Recesses 13aa are provided on both diametrical ends of the flange portion 13, which can be engaged with a jig such as a screwdriver. An operator engages the tip of a jig with each of the two recesses 13aa and rotates each jig clockwise to rotate the flange portion 13 and tighten the locking body 11.

[0035] The packing portion 15 is a cushioning and flexible member, made of, for example, urethane, and the internal bubbles are closed cells. In this embodiment, urethane foam is used. The packing portion 15 has the function of preventing water penetration. Specifically, the packing portion 15, together with the flange portion 13 and the crushable packing portion 16, seals the surface of the underground beam 1 around the through hole 2, preventing water penetration between the underground beam 1b.

[0036] The collapsible packing portion 16 is a member that easily collapses when pressure is applied. The thickness of the collapsible packing portion 16 is 5 mm, but when the locking body 11 is tightened and the collapsible packing portion 16 is sandwiched between the flange portion 13 and the wall surrounding the through-hole 2 of the underground beam 1b and crushed, the thickness becomes, for example, 1 to 2 mm or less. In this embodiment, the cells in the collapsible packing portion 16 are interconnected cells. Furthermore, the collapsible packing portion 16 of this embodiment has a color that is easily visible at the work site. An example of an easily visible color is yellow, but any color such as red, blue, or green may be used.

[0037] In order to screw the outer tubular portion 12 onto the outer periphery of the corrugated tubular material 5, an engagement portion 14a is provided on the inner surface of the outer tubular portion 12 (see FIGS. 2 and 6). In this embodiment, a pair of engagement portions 14a protrude toward the center at positions facing each other on the inner circumferential surface of the outer tubular portion 12. This allows the locking body 11 to be stably screwed onto the corrugated tubular material 5.

[0038] A plurality of fins 17 extending in the longitudinal direction are formed at regular intervals around the periphery of the locking body 11. The fins 17 include a first partial fin 17a present on the first partial locking body 11a and a second partial fin 17b present on the second partial locking body 11b. The tip of each fin 17 is connected to the flange 12. This allows the fins 17 to increase the strength of the locking body 11. The fins 17 also function as a non-slip surface when the operator rotates the locking body 11.

[0039] The outer cylinder portion 12, flange portion 13, and fin portion 17 are formed of a hard material such as resin, and more specifically, are formed of a hard material such as hard polyethylene, polycarbonate, ABS, or polypropylene.

[0040] As described above, the locking body 11 of this embodiment includes an outer tubular portion 12 that screws onto the outer peripheral surface side of the corrugated pipe material 5, a flange portion 13 formed on the tip side of the outer tubular portion 12, an engaging portion 14 that is formed inside the outer tubular portion 12 and screws onto the outer peripheral spiral irregularities 6a on the outer peripheral surface side of the corrugated pipe material 5, and a packing portion 15 attached to the flange portion 12.

[0041] In this embodiment, the locking body 11 is made up of a first partial locking body 11a and a second partial locking body 11b, and the first partial outer cylindrical portion 12a and the second partial outer cylindrical portion 12b are divided in the circumferential direction of the outer cylindrical portion 12. Similarly, the first partial flange portion 13a and the second partial flange portion 13b are also divided in the circumferential direction of the flange portion 13, and the first partial packing portion 15a and the second partial packing portion 15b, and the first partial crushable packing portion 16a and the second partial crushable packing portion 16b are also divided in the circumferential direction of the packing portion 15 and the crushable packing portion 16, respectively. Also, as shown in FIGS. 5 and 6, the first partial locking body 11a is larger in size than the second partial locking body 11b.

[0042] Specifically, as shown in Fig. 7, in second partial locking body 11b, the central angle X of the substantially sector-shaped second partial packing portion 15b relative to the center P of second partial outer cylinder portion 12b is 100°. On the other hand, in first partial locking body 11a, the central angle Y of the substantially sector-shaped first partial packing portion 15a relative to the center P of first partial outer cylinder portion 12a is 260°. As shown in Fig. 6, when the size of second partial flange portion 13b is compared with the size of first partial flange portion 13a, the former has a central angle of 100° and the latter has a central angle of 260°, which is the same relationship as that of packing portion 15, and there is a significant difference of 2.5 times or more.

[0043] 9, the locking body 11 of this embodiment has a two-layer region 21 in which the first partial locking body 11a and the second partial locking body 11b overlap with each other so that one is on the outside and the other is on the inside in the radial direction of the outer cylindrical portion 12 when the first partial locking body 11a and the second partial locking body 11b are fitted together. The radial direction of the outer cylindrical portion is the direction indicated by arrow R in FIG.

[0044] Specifically, as shown in FIGS. 5 and 9, in the second partial locking body 11b, the second partial outer cylinder portion 12b is thin near the tip and recessed toward the inner circumferential side, thereby reducing the thickness to half. Meanwhile, as shown in FIG. 9, the first partial locking body 11a also has a portion of the first partial outer cylinder portion 12a where the outer circumferential side is recessed, thereby reducing the thickness to half. Thus, in this embodiment, when the first partial locking body 11a and the second partial locking body 11b are fitted together, a two-layer region 21 is provided in which the first partial outer cylinder portion 12a is on the inside and the second partial outer cylinder portion 12b is on the outside in the radial direction of the outer cylinder portion 12. As shown in FIG. 9, the two-layer region 21 is provided such that the central angle Z with respect to the center of the outer cylinder portion 12 is, for example, in the range of 60° to 100°.

[0045] 10, the two-layer region 21 is provided with locking portions 22a and 22b that restrict the first partial locking body 11a and the second partial locking body 11b from rotating in a direction that separates them. Specifically, the locking portions 22a and 22b are configured so that a locking hole 22a provided at the start position of the two-layer region 21 of the first partial outer cylinder portion 12a is locked with a protrusion 22b provided at the tip of the two-layer region 21 of the second partial outer cylinder portion 12b.

[0046] In this embodiment, the first partial flange portion 13a of the first partial locking body 11a is provided with a notch portion 24 that enhances flexibility. Specifically, in this embodiment, as shown in Fig. 6, the notch portion 24 has a shape that combines a slit 24a that has a required width and extends radially in the first partial flange portion 13 with a circular hole 24b that is provided toward the center in the radial direction.

[0047] As shown in Fig. 11(d), the pipe connector 10 of this embodiment is provided with a belt 40 for binding the peripheries of a plurality of partial locking bodies (in this embodiment, the first partial locking body 11a and the second partial locking body 11b) that are fitted together. As shown in Fig. 4, the first partial outer cylinder portion 12a of the first partial locking body 11a is provided with two loop-shaped insertion portions 23 for passing the belt 40 through.

[0048] [Effects of this embodiment] In this embodiment, the locking body 11 is made up of a separable first partial locking body 11a and a second partial locking body 11b, and the multiple partial locking bodies are fitted together, attached to the outer circumferential surface of the corrugated pipe material 5, and screwed together. The locking body 11 has a structure that can be separated into two in the circumferential direction of the outer tubular portion 12 and the flange portion 13. As a result, in this embodiment, even when the corrugated pipe material 5 is passed through the through-holes 2 formed in the structures 1a and 1b to be buried underground and the locking bodies 11 to be screwed onto the outer periphery of the corrugated pipe material 5 are fixed facing each other, the worker can attach the locking body 11 simply by fitting the first partial locking body 11a and the second partial locking body 11b together, and can start tightening by screwing from the attached position.

[0049] According to this embodiment, there is no need to rotate and move the locking body 11 from the tip of the corrugated pipe material 5 to the position where it clamps the underground beam 1a, which reduces the worker's workload and significantly shortens the work time.

[0050] When the locking body 11 is divided into a first partial locking body 11a and a second partial locking body 11b, the sizes of the partial locking bodies may be the same. However, in this embodiment, the first partial locking body 11a is larger than the second partial locking body 11b. If the sizes of the partial locking bodies were the same (each central angle was 180°), as shown in FIG. 11(b), if one partial locking body was attached first, the attached partial locking body would be unstable and could fall. In contrast, in this embodiment, the size of the first partial outer cylinder portion 12a of the first partial locking body 11a is sufficiently large (the central angle is 260°). Therefore, as shown in FIG. 11(b), the first partial locking body 11a attached first is in contact with the corrugated pipe 5 over a wide area and is stable, facilitating the fitting operation with the second partial locking body 11b.

[0051] When the first partial locking body 11a and the second partial locking body 11b are fitted together, the thickness of each outer cylindrical portion 12 may be constant and the ends of each outer cylindrical portion 12 may be fitted together, but in this embodiment, when the first partial locking body 11a and the second partial locking body 11b are fitted together, a two-layer region 21 is provided in which the first partial locking body 11a and the second partial locking body 11b overlap so that one side is on the outside and the other is on the inside in the radial direction of the outer cylindrical portion 12.

[0052] If the ends of the first partial outer cylinder portion 12a and the second partial outer cylinder portion 12b were to be fitted together, the fitted portion would be weak and there would be a risk of breakage during tightening work on site. In contrast, in this embodiment, there is a two-layer region 21 where the first partial locking body 11a and the second partial locking body 11b overlap, and the first partial locking body 11a and the second partial locking body 11b are in contact over a wide range of the two-layer region 21, so the strength of the fitted portion is increased and the risk of breakage can be reduced.

[0053] Additionally, in this embodiment, locking portions 22a and 22b that restrict rotation in a direction that separates the first and second partial outer cylinder portions 12a and 12b are provided in the two-layer region 21. This makes it difficult for the first partial locking body 11a and the second partial locking body 11b to separate, and the fitted state is firmly maintained.

[0054] As described above, the first partial locking body 11a of this embodiment is made of hard resin and is large in size, so a considerable force is required to expand the first partial outer cylinder portion 12a when attaching it to the corrugated pipe material 5 at the work site. Therefore, in this embodiment, the first partial flange portion 13a of the first partial locking body 11a is provided with a notch portion 24 to increase flexibility. This makes the first partial flange portion 13a moderately flexible, which in turn makes it easier to expand the first partial outer cylinder portion 12a and attach the first partial locking body 11a to the corrugated pipe material 5.

[0055] Furthermore, the locking body 11 is provided with engaging portions 22a, 22b, and the first partial locking body 11a and the second partial locking body 11b do not easily separate. However, in order to maintain the fitted state more firmly, in this embodiment, as shown in FIG. 11(d), a belt 40 is provided to tie the first partial locking body 11a and the second partial locking body 11b together when they are fitted together. At the work site, tightening work is performed while they are tied together with the belt 40. Furthermore, the first partial outer cylinder portion 12a of the first partial locking body 11a has insertion portions 23 in two locations through which the belt 40 passes, making the work of tying the belt 40 easier and preventing the worker from misaligning the position at which the belt 40 is tied.

[0056] [Effects of other configurations] The material and thickness of the crushable packing portion 16 are determined so that when the locking body 11 is screwed in and properly tightened, the thickness of the crushable packing portion 16 is compressed to 1 to 2 mm or less. In addition to the thickness of the crushable packing portion 16 being compressed to 1 to 2 mm or less, the peripheral edge of the crushable packing portion 16 is covered by the peripheral edge of the first packing portion 15, whose outer diameter has expanded slightly due to the tightening pressure. Therefore, to the worker, the yellow line that was present on the side of the crushable packing portion 16 before tightening was completed appears to gradually become thinner and eventually disappear.

[0057] This allows the worker to use the disappearance of the yellow line on the crushable packing portion 16 as a sign that the tightening of the lock body 11 is complete, allowing the worker to tighten the lock body 11 appropriately.

[0058] [First Modification of the Present Embodiment] The pipe connection structure of this modified example uses the above-mentioned pipe connector 10, a wrapping fastening material 41 of the required length that can be wrapped around and fastened to the outer periphery of the corrugated pipe 5, and a caulking material 43 to connect and fix the corrugated pipe 5 to the through hole 2 formed in the underground beam 1, while also improving watertightness. In this modified example, a soft urethane foam material is used as the wrapping fastening material 41.

[0059] In this modification, as shown in FIG. 11(a), the corrugated pipe material 5 is inserted into the through-hole 2, and the wrapping locking material 41 is wrapped around the outer periphery of the corrugated pipe material 5 to lock it in place. The wrapping locking material 41 can be simply wrapped around the corrugated pipe material 5, or, if necessary, tied to it. Next, as shown in FIG. 11(b), the corrugated pipe material 5 with the wrapping locking material 41 wrapped around it is inserted into the through-hole 2, and the first partial locking body 11a is attached to the corrugated pipe material 5. Then, as shown in FIG. 11(c), the second partial locking body 11b is fitted to the first partial locking body 11a and the second partial locking body 11b are fastened together by a belt 40, as shown in FIG. 11(d).

[0060] As shown in Fig. 6, a small circle-shaped planned injection port portion 18b is marked on the second flange portion 13b. After using a drill to form an injection port along the planned injection port portion 18b, an operator injects caulking material 43 into the injection port using an injection tool 42, as shown in Fig. 12(a). At this time, in this modified example, the wound locking material 41 is fixed in a state where it is wrapped around the outer circumferential surface of the corrugated pipe material 5 at a required position inside the through hole 2. Therefore, the wound locking material 41 can serve as a wall (partition) inside the through hole 2.

[0061] 12(b), the caulking material 43 can be filled so as to fill only the space between the wrapping engaging material 41 and the locking body 11. This makes it possible to fill the caulking material 43 more efficiently and in a shorter time than when the caulking material 43 is filled in the entire through-hole 2.

[0062] [Second Modification of the Present Embodiment] In this modified example, as shown in Figures 13(a) and 13(b), the pipe connector 10 further includes a mouth body 31 having an inner tubular portion 32 that screws into the inner spiral irregularities 6b provided on the inner surface of the corrugated pipe material 5, an inner flange portion 33 formed on the tip side of the inner tubular portion 32, a second engagement portion 34 formed on the outside of the inner tubular portion 32 and that screws into the inner spiral irregularities 6b provided on the inner surface of the corrugated pipe material 5, and a second gasket portion 35 attached to the inner flange portion 33.

[0063] The inner tube portion 32 and the inner flange portion 33 are formed of a hard or slightly flexible material such as resin, specifically, polyethylene, polycarbonate, ABS, polypropylene, or other hard or slightly flexible materials. The inner tube portion 32 has an opening 32a in the center. The inner tube portion 32 is a cylindrical member whose outer diameter is slightly smaller than the inner diameter of the corrugated tubing 5. The inner tube portion 32 is inserted into the corrugated tubing 5 from the tip side and is screwed onto the inner peripheral surface of the tip portion of the corrugated tubing 5.

[0064] The inner flange portion 33 is a member that extends outward in a disk shape from the entire circumference of the tip end of the inner cylindrical portion 32. An annular second packing portion 35 is bonded to the surface of the inner flange portion 33 opposite to the tip end surface with an adhesive or the like.

[0065] The second packing portion 35 has an annular shape, more specifically, a circular ring shape. The second packing portion 35 is a cushioning and flexible material, such as urethane, with closed-cell foam inside. In this modified example, urethane foam with the same physical properties as the packing portion 15 described above is used. The second packing portion 35 has the function of preventing water penetration. Specifically, the second packing portion 35, together with the inner flange portion 33, seals the surface of the underground beam 1 around the through-hole 2, preventing water from penetrating between the second packing portion 35 and the underground beam 1.

[0066] A second engagement portion 34 is provided on the outer peripheral surface of the inner cylindrical portion 32. In this modified example, a continuous spiral second engagement portion 34 is protruded from the inner peripheral surface of the inner cylindrical portion 32. The mouth body 31 is inserted into the corrugated tubing 5 from the tip side, and the second engagement portion 24 formed on the outer peripheral surface of the inner cylindrical body 32 can rotate while threadingly engaging with the inner peripheral spiral irregularities 6b of the corrugated tubing 5.

[0067] 18, when underground beams 1ba and 1bb are adjacent to each other with a certain distance between them and the corrugated pipe material 5 is passed through the through hole 2 of the underground beam 1ba and then connected to the through hole 2 of the underground beam 1bb, this modified example can be suitably used to connect and fix the corrugated pipe material 5 to the through hole 2 of the underground beam 1bb. The mouse body 31 of this modified example can be used in combination with the first partial locking body 11a and the second partial locking body 11b of the above-mentioned embodiment.

[0068] [Other variations] In the above-described embodiment, the lock body 11 is not limited to a configuration that can be separated into two partial lock bodies, but may be a configuration that can be separated into three or more partial lock bodies.

[0069] In the above-described embodiment, a spirally continuous engagement portion 14 may be formed on the inner circumferential surface of the outer tubular portion 12 of the locking body 11. Furthermore, three or more engagement portions 14 may be formed on the inner circumferential surface of the outer tubular portion 12.

[0070] In the above-described embodiment, the flange portion 13 may have any shape, such as a partially cut-out shape, an ellipse, a polygonal shape, etc. Also, the flange portion 13 may extend obliquely rather than perpendicularly to the outer tube portion 11. [Industrial Applicability]

[0071] INDUSTRIAL APPLICABILITY The present invention can be used for a pipe connector that connects and fixes a corrugated pipe to a through-hole formed in a structure buried underground. [Explanation of symbols]

[0072] 1b Structure (underground beam) 2 through holes 5 Corrugated pipe material (FEP pipe) 6a Outer circumference spiral unevenness 10 Pipe fittings 11 Locked 11a First partial locking body 11b Second partial locking body 12 outer cylinder 12a First section outer cylinder 12b Second outer cylinder part 13 Flange 13a First flange portion 13b Second flange portion 14a engagement portion 15 Packing part 15a First packing section 15b Second packing section 16 Crushable packing part 16a First partial crushed packing part 16b Second partial crushed packing part 17 Fin section 17a First partial fin part 17b Second partial fin part 18b Injection area 21 Two layer area 22a Locking hole (locking part) 22b Protrusion (locking part) 23 Insertion part 24a Slit (notch) 24b Hole (notch) 40 Belt

Claims

1. A pipe connector that connects and fixes a corrugated pipe having irregularities formed in a spiral shape at least on its outer circumferential surface to a through hole formed in a structure buried underground by clamping the structure around the through hole using two locking bodies, the locking body includes an outer tubular portion that screws onto the outer circumferential surface side of the corrugated pipe material, a flange portion formed on the tip side of the outer tubular portion, an engaging portion that is formed inside the outer tubular portion and screws onto the spiral concave and convex on the outer circumferential surface side of the corrugated pipe material, and a packing portion attached to the flange portion, The locking body is composed of a plurality of separable partial locking bodies, and the plurality of partial locking bodies are fitted to each other and attached to the outer peripheral surface of the corrugated pipe material and screwed together. the plurality of partial locking bodies are composed of a first partial locking body and a second partial locking body, and the first partial locking body is larger in size than the second partial locking body; A pipe connector in which a notch for increasing flexibility is provided in the flange portion of the first partial locking body.

2. 2. The pipe connector according to claim 1, wherein the first partial locking body and the second partial locking body have a two-layer region in which they overlap so that one is on the outside and the other is on the inside in the radial direction of the outer tubular portion when the first partial locking body and the second partial locking body are fitted together.

3. 3. The pipe connector according to claim 2, wherein the two-layer region is provided with a locking portion that restricts the first partial locking body and the second partial locking body from rotating in a direction that separates them.

4. 3. The pipe connector according to claim 1, further comprising a belt that binds the peripheries of the plurality of partial locking bodies that are fitted together, and the partial locking bodies are provided with an insertion portion through which the belt passes.

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