Manhole repair structure, manhole repair kit, and manhole repair method
The manhole repair structure with movable joints and a two-part design simplifies the connection process by enabling external assembly, addressing the challenges of space constraints and improving efficiency in manhole repairs.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- ARONKASEI
- Filing Date
- 2022-05-26
- Publication Date
- 2026-06-15
Smart Images
Figure 0007873991000001 
Figure 0007873991000002 
Figure 0007873991000003
Abstract
Description
【Technical Field】 【0001】 The present invention relates to a repair structure and a repair method for repairing a manhole buried underground. 【Background Art】 【0002】 In recent years, the aging of manholes buried underground, such as public manholes for drainage, has become a problem. Since there are many such manholes and it is costly to replace them with new ones, it has been proposed to repair the existing manholes while they are buried in order to reduce costs (for example, Patent Document 1). In the repair structure 20a according to Patent Document 1, as shown in FIG. 14, a bottomed cylindrical repair manhole member 22a having a smaller diameter than the existing manhole 1 is installed inside the manhole 1, and the repair manhole member 22a is connected to an inlet 13 that opens on one side of the manhole 1 and an outlet 14 that opens on the other side. According to such a repair structure 20a, water flowing in from the inlet 13 can be made to flow out from the outlet 14 through the repair manhole member 22a without contacting the inner surface of the manhole 1. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 20-143523, paragraphs 【0078】 to 【0097】 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 In the repair structure 20a described in Patent Document 1, the repair manhole member 22a is connected to the outlet 14 inside the manhole 1, and then the repair manhole member 22a is connected to the inlet 13 via a joint 23a. However, at the stage when the repair manhole member 22a is connected to the outlet 14, as shown in Figure 14, the distance between the repair manhole member 22a and the inlet 13 becomes narrower than the total length of the joint 23a, making it difficult to connect the joint 23a to the inlet 13. Therefore, in this repair structure 20a, the joint 23a is extended outwards from inside the repair manhole member 22a to connect it to the inlet 13. However, extending the joint 23a outwards from the narrow space inside the repair manhole member 22a is a complicated process, and in the conventional repair structure 20a, the connection work between the joint 23a and the inlet 13 is time-consuming and laborious. 【0005】 This invention has been made in view of the current situation, and aims to provide a manhole repair structure, a manhole repair kit, and a manhole repair method that allow for easier repair of manholes compared to conventional methods. [Means for solving the problem] 【0006】 The present invention relates to a manhole repair structure for repairing a manhole through which water flows in from an inlet opening on one side and out into an outlet opening on the other side, comprising: a bottomed cylindrical repair manhole member installed inside the manhole; an inlet-side joint connecting the repair manhole member and the inlet by connecting one end to the inlet and the other end to the repair manhole member; and a repair manhole member connecting one end to the outlet and the other end to the repair manhole member. The manhole repair structure comprises a manhole and an outlet-side joint that connects the manhole and the outlet, wherein the inlet-side joint is connected to the inlet by fitting one end into the inflow pipe from the inlet side, the outlet-side joint allows the repair manhole member to move toward or away from the outlet within a predetermined range of motion while maintaining the connection between the outlet and the repair manhole member, and the fitting length between one end of the inlet-side joint and the inflow pipe is shorter than the range of motion. 【0007】 In this configuration, even after connecting the outlet and the repair manhole member via the outlet-side joint, the distance between the repair manhole member and the inlet can be expanded or contracted by moving the repair manhole member closer to or further away from the outlet. Here, since the range of motion of the repair manhole member is longer than the fitting length between the end of the inlet-side joint and the inflow pipe, in this configuration, the distance between the repair manhole member and the inlet can be expanded from the distance at which the repair manhole member and the inlet are connected by the inlet-side joint to a distance at which the inlet-side joint prevents the repair manhole member and the inlet from being connected, and at which point the inlet-side joint can be easily placed between the repair manhole member and the inlet. Therefore, in the manhole repair structure of the present invention, by expanding the distance between the repair manhole member and the inlet, placing the inlet-side joint between the repair manhole member and the inlet, and then narrowing the distance between the repair manhole member and the inlet, the inlet-side joint can be easily connected to the inlet and the repair manhole member compared to the conventional configuration. 【0008】 In the present invention, the outlet-side joint is connected to the outlet by inserting one end into the outlet pipeline from the outlet, and while connected to the outlet, the one end can be slid in the insertion / removal direction within the movable range within the outlet pipeline. 【0009】 In this configuration, since it is possible to move the repair manhole member closer to or further away from the outlet using a simple structure without employing expandable joints or the like at the outlet side joint, the repair structure for the manhole can be realized at a low cost. 【0010】 Furthermore, in the present invention, the repair manhole member comprises a bottomed cylindrical lower manhole member and a bottomless cylindrical upper manhole member attached to the upper end of the lower manhole member, wherein the other end of the outlet-side joint is connected to the lower manhole member and the other end of the inlet-side joint is connected to the upper manhole member. 【0011】 In this configuration, the connection work between the inlet-side joint and the repair manhole member can be performed outside the manhole, making manhole repair work even easier. That is, when the repair manhole member is composed of a single member, in order to prevent the inlet-side joint from interfering with the connection between the repair manhole member and the outlet, the connection work between the inlet-side joint and the repair manhole member must be performed inside the manhole after the repair manhole member has been connected to the outlet. In contrast, in this configuration, the upper part of the repair manhole member to which the inlet-side joint is connected (upper manhole member) can be attached after the lower part of the repair manhole member (lower manhole member) has been connected to the outlet, so the connection work between the inlet-side joint and the repair manhole member can be performed outside the manhole in advance. 【0012】 In the above configuration, the upper manhole member is cylindrical in shape, and the lower manhole member has a rubber ring receiving opening at the part where the lower end of the upper manhole member is attached. 【0013】 Although there is variation in the shape of manholes requiring repair, this configuration allows for easy adjustment of the orientation of the inlet-side joint by changing the angle of the upper manhole member relative to the lower manhole member, thus enabling repair of a wide range of manhole shapes. Specifically, the horizontal orientation of the inlet-side joint can be adjusted by horizontally rotating the upper manhole member when attaching it to the lower manhole member. Furthermore, the vertical orientation of the inlet-side joint can be adjusted by elastically deforming the rubber ring of the rubber ring socket, thereby tilting the upper manhole member around its lower end. 【0014】 Furthermore, in the present invention, a configuration is proposed in which the inlet side joint is a universal joint. 【0015】 With this configuration, the connection angle between the inlet and the repair manhole member can be adjusted by tilting the end of the inlet-side joint, making the connection work between the inlet and the repair manhole member even easier. 【0016】 Another aspect of the present invention is a manhole repair kit for repairing a manhole through which water flows in from an inlet opening on one side and out into an outlet opening on the other side, comprising: a bottomed cylindrical repair manhole member installed inside the manhole; an inlet-side joint connecting the repair manhole member and the inlet by connecting one end to the inlet and the other end to the repair manhole member; and a repair manhole member connecting one end to the outlet and the other end to the repair manhole member. The manhole repair kit includes an outlet-side joint that connects to the outlet, wherein the inlet-side joint is connected to the inlet by fitting one end into the inflow pipe from the inlet side, the outlet-side joint allows the repair manhole member to move toward or away from the outlet within a predetermined range of motion while maintaining the connection between the outlet and the repair manhole member, and the fitting length between one end of the inlet-side joint and the inflow pipe is shorter than the range of motion. 【0017】 According to this manhole repair kit, the repair structure of the manhole of the present invention can be easily realized. 【0018】 Another aspect of the present invention is a method for repairing a manhole, wherein a bottomed cylindrical repair manhole member is provided inside the manhole through which water from an inlet opening on one side flows in from an inlet pipeline and water from an outlet opening on the other side flows out into an outlet pipeline, the repair manhole member and the inlet are provided inside the manhole, the repair manhole member and the inlet are provided by connecting one end to the inlet and the other end to the repair manhole member, and the repair manhole member and the outlet are provided by connecting one end to the outlet and the other end to the repair manhole member, wherein the outlet-side joint allows the repair manhole member to move toward or away from the outlet within a predetermined range of motion while maintaining the connection between the outlet and the repair manhole member, and the outlet-side joint is provided inside the manhole. The method for repairing a manhole is characterized by comprising: a first step of connecting the repair manhole member and the outlet, respectively, and positioning the inlet-side joint between the repair manhole member and the inlet, with the inlet-side joint maintaining the distance between the repair manhole member and the inlet so that the distance between the repair manhole member and the inlet is such that the repair manhole member and the inlet cannot communicate; and a second step after the first step of moving the repair manhole member away from the outlet while the outlet-side joint maintains the connection between the outlet and the repair manhole member, thereby enabling the inlet-side joint to connect the repair manhole member and the inlet. 【0019】 If the repair structure is configured to allow the repair manhole member to move toward or away from the outlet even after connecting the outlet and the repair manhole member via the outlet-side joint, then, as in the repair method described above, the inlet-side joint connected to the repair manhole member can be easily connected to the inlet by moving the repair manhole member, along with the manhole member, from a position separated from the inlet to the inlet. Therefore, the repair structure of the manhole of the present invention makes the connection work between the repair manhole member and the inlet easier compared to conventional configurations. [Effects of the Invention] 【0020】 As described above, according to the present invention, after connecting the repair hook member and the outlet through the outlet-side joint, the inlet-side joint can easily connect the repair hook member and the inlet. Therefore, it is possible to easily perform the repair work of the hook compared to the prior art. 【Brief Description of the Drawings】 【0021】 [Figure 1] It is a longitudinal sectional view of the hook 1 before repair. [Figure 2] It is a longitudinal sectional view of the hook 1 after repair. [Figure 3] (A) It is a sectional view taken along the line X-X in FIG. 1. (B) It is a sectional view taken along the line Y-Y in FIG. 2. [Figure 4] It is a side view of the repair structure 20. [Figure 5] It is an exploded view of the repair structure 20. [Figure 6] It is an explanatory view showing the connection mode between the outlet-side joint 24 and the outlet 14. (A) shows a state where the tip of the outlet insertion part 40 is inserted into the outflow pipe 11, and (B) shows a state where the entire outlet insertion part 40 is inserted into the outflow pipe 11. [Figure 7] It is an explanatory view showing the connection mode between the inlet-side joint 23 and the inlet 13. (A) shows a state before connecting the inlet-side joint 23, and (B) shows a state after connecting the inlet-side joint 23. [Figure 8] It is an explanatory view showing the repair procedure of the hook 1. [Figure 9] It is an explanatory view showing the repair procedure of the hook continuing from FIG. 8. [Figure 10] It is an explanatory view showing the repair procedure of the hook continuing from FIG. 9. [Figure 11] It is an explanatory view showing the repair procedure of the hook continuing from FIG. 10. [Figure 12] It is an explanatory view showing the inlet connection process. (A) shows a state before connection, and (B) shows a state after connection. [Figure 13] It is an explanatory view showing a case where the hook 1a of a different form is repaired with the repair structure 20. (A) shows a state before connecting the inlet-side joint 23 and the inlet 13, and (B) shows a state after connecting the inlet-side joint 23 and the inlet 13. [Figure 14] This is an explanatory diagram showing a conventional repair structure 20a. [Modes for carrying out the invention] 【0022】 Embodiments of the present invention will be described according to the following examples. Figure 1,3(A) is a cross-sectional view of manhole 1 to be repaired by the repair structure of this embodiment, showing its condition before repair. Manhole 1 is a concrete public manhole for drainage, but the manholes to be repaired by the present invention are not limited to those made of concrete, nor are they limited to drainage manholes or public manholes. 【0023】 Manhole 1 is a bottomed cylindrical structure and comprises a bottom wall 2, cylindrical side walls 3 rising almost vertically from around the bottom wall 2, and an inclined wall 4 that narrows upward from the upper end of the side wall 3. A cover frame 6 and a cover body 7 are installed on top of the inclined wall 4 to close the opening 5 at the upper end of manhole 1. Manhole 1 is buried so that only the cover frame 6 and cover body 7 are exposed above the ground surface. Household wastewater flows into manhole 1 from an inlet 13 that opens on one side (left side in the diagram), and the wastewater flows out into the sewer from an outlet 14 that opens on the other side (right side in the diagram). More specifically, an inlet pipe 10 is connected to one side of manhole 1, and an outlet pipe 11 is connected to the other side. The inlet pipe 10 and the outlet pipe 11 are connected such that their respective ends are flush with the inner surface of the side wall 3. The end of the inlet pipe 10 constitutes the inlet 13, and the end of the outlet pipe 11 constitutes the outlet 14. The inlet pipe 10 is buried underground and connects the manhole 1 with a household drain manhole (not shown). Drainage from the household drain manhole flows through the inlet pipe 10 and into the manhole 1 from the inlet 13. The outlet pipe 11 is buried underground and connects the manhole 1 with the main sewer line (not shown). Drainage from inside the manhole 1 flows through the outlet pipe 11 and into the sewer from the outlet 14. The material of the inlet pipe 10 and the outlet pipe 11 connected to the manhole 1 is not particularly limited, but generally includes concrete pipes, ceramic pipes, and polyvinyl chloride pipes. 【0024】 As shown in Figure 1, the outlet 14 opens on the other side of the manhole 1, near the bottom, while the inlet 13 opens on one side of the manhole, higher than the outlet 14. A groove-like invert 15 is formed at the bottom of the manhole 1, sloping downward from the inlet 13 to the outlet 14, and the wastewater flowing in from the inlet 13 is directed down the invert 15 to the outlet 14. Furthermore, as shown in Figure 3(A), the inlet 13 and the outlet 14 open symmetrically with respect to the center of the manhole 1 in a plan view, and the inlet pipe 10 and the outlet pipe 11 are arranged on approximately the same straight line in a plan view. 【0025】 Figures 2,3(B) are cross-sectional views showing the state after the manhole 1 described above has been repaired using the manhole repair structure 20 according to this embodiment (hereinafter simply referred to as "repair structure 20"). The repair structure 20 of this embodiment comprises a repair manhole member 22 installed inside the manhole 1, an inlet-side joint 23 connecting the repair manhole member 22 to the inlet 13, and an outlet-side joint 24 connecting the repair manhole member 22 to the outlet 14. Unless otherwise specified, these are made of a resin such as polyvinyl chloride, but the material of the repair structure of the present invention is not particularly limited. Such a repair structure 20 can be provided to a repair contractor as an assembly-type manhole repair kit in which the repair manhole member 22, the inlet-side joint 23, and the outlet-side joint 24 are separated. In a manhole 1 repaired by such a repair structure 20, wastewater flowing in from the inlet 13 flows out from the outlet 14 without touching the inner surface of the manhole 1. In other words, wastewater that flows through the inlet pipe 10 and into the manhole 1 from the inlet 13 flows into the repair manhole member 22 through the inlet side joint 23, and the wastewater that has flowed into the repair manhole member 22 flows out through the outlet side joint 24 and into the outlet pipe 11 from the outlet 14. 【0026】 As shown in Figure 2, in this embodiment, after the repair structure 20 is installed, the inside of the box 1 is filled with a filler material 29. The material of the filler material 29 is not particularly limited, but inexpensive mountain sand is a suitable material, and mortar or various hardening resins can also be used. Multiple types of filler material 29 may be used depending on the filling area. 【0027】 As shown in Figure 2, in this embodiment, the cover frame 6 and cover body 7 (see Figure 1) that were installed above the manhole 1 are removed when the repair structure 20 is installed, and after the repair structure 20 is installed, a slightly smaller repair cover frame 26 and repair cover body 27 are installed to close the opening 25 at the upper end of the repair manhole member 22. The repair cover frame 26 is installed on top of the filled filler material 29, but it may also be fixed to the upper end of the repair manhole member 22 or to the upper edge of the manhole 1. 【0028】 As shown in Figure 4, the repair manhole member 22 is a bottomed cylindrical shape extending in the vertical direction. An inlet-side joint 23 is connected in a branching manner to a communication opening 38 that opens on one side near the lower center, and an outlet-side joint 24 is connected to a horizontal pipe 35 that extends substantially horizontally from the other side of the lower end. 【0029】 As shown in Figure 5, the repair manhole member 22 is formed by attaching a bottomless cylindrical upper manhole member 31 to the upper end of a bottomed cylindrical lower manhole member 30. A horizontal pipe 35 for connecting the outlet side joint 24 is formed in the lower manhole member 30, and a communication opening 38 for connecting the inlet side joint 23 is formed in the upper manhole member 31. The lower manhole member 30 and the upper manhole member 31 are cylindrical in shape with approximately the same diameter, and the repair manhole member 22 is constructed by inserting the lower end of the upper manhole member 31 into a rubber ring receiving opening 33 provided at the upper end of the lower manhole member 30 and connecting them vertically. Since the upper manhole member 31 is connected to the lower manhole member 30 via the rubber ring receiving opening 33, as shown in Figure 4, the rubber ring 34 inside the rubber ring receiving opening 33 can be tilted around the rubber ring receiving opening 33 within the range in which it can elastically deform. The material for the rubber ring 34 can be natural rubber or synthetic rubber, with SBR (styrene-butadiene rubber) being preferred among them. 【0030】 As shown in Figures 4 and 5, the horizontal pipe 35 to which the outlet-side fitting 24 is connected has a short cylindrical shape that extends laterally from the lower side surface of the lower manhole member 30, and the outlet-side fitting 24 is connected to the tip of the horizontal pipe 35. In addition, a guide surface 36 that slopes downward toward the horizontal pipe 35 is formed on the inner bottom surface of the lower manhole member 30. 【0031】 As shown in Figures 4 and 5, the upper manhole member 31 is a vertically elongated cylinder, formed to a length that matches the shape of the manhole 1 so that the opening 25 at the upper end reaches close to the ground surface. The lower end of the upper manhole member 31 is chamfered to facilitate attachment to the lower manhole member 30. Since the length of the upper manhole member 31 varies depending on the depth of the manhole 1 to be installed, it is proposed to prepare a longer size and cut it according to the depth of the manhole 1. The communication opening 38 for connecting the inlet-side joint 23 is a through-hole that penetrates the side of the upper manhole member 31. The communication opening 38 is formed in a position that matches the shape of the manhole 1 to be repaired so that it is at approximately the same height as the inlet 13 when the repair manhole member 22 is installed. 【0032】 As shown in Figure 2, the outlet-side joint 24 is a cylindrical resin member, and connects the repair manhole member 22 and the outlet 14 by connecting its tip to the outlet 14 and its base end to the lower manhole member 30. As shown in Figures 4 and 5, the outlet-side joint 24 is made up of an outlet insertion part 40 having a substantially uniform outer diameter, with a receiving opening 41 provided on the base end side. The tip of the outlet insertion part 40 is inserted from the outlet 14 into the outflow pipeline 11 to connect it to the outlet 14, and the receiving opening 41 is fitted onto the tip of the horizontal pipe 35 to connect it to the lower manhole member 30. 【0033】 The outer diameter of the outlet insertion portion 40 is slightly smaller than the inner diameter of the outflow pipe 11. As shown in Figure 6(A), the outlet-side joint 24 is connected to the outlet 14 by inserting the outlet insertion portion 40 into the outflow pipe 11 from the outlet 14 and ensuring watertightness by making the O-ring 42 fitted to the tip tightly contact the inner surface of the outflow pipe 11. Here, the tip of the outlet insertion portion 40 with the O-ring 42 fitted to it is not fixed to the outflow pipe 11, but can slide in the insertion and removal direction inside the outflow pipe 11. Therefore, by sliding the tip of the outlet insertion portion 40 in the insertion / removal direction, the outlet-side joint 24 can be moved forward and backward by the length of the movable range L1 in Figure 6, while maintaining its connection with the outlet 14, from a position where only the tip of the outlet insertion portion 40 is inserted into the outflow pipeline 11 (see Figure 6(A)) to a position where the entire outlet insertion portion 40 is inserted into the outflow pipeline 11 (see Figure 6(B)). With this configuration, while the outlet-side joint 24 is connected to the outlet 14 and the repair manhole member 22, the repair manhole member 22 can be moved toward or away from the outlet 14 by the length of the movable range L1 in the insertion / removal direction of the outlet-side joint 24. 【0034】 As shown in Figure 2, the inlet-side joint 23 connects the repair manhole member 22 and the inlet 13 by connecting its tip to the inlet 13 and its base to the upper manhole member 31. As shown in Figures 4 and 5, the inlet-side joint 23 is a universal joint with a tiltable tip, and is composed of a joint body 46 and a mounting pipe 47 connected to the tip of the joint body 46. 【0035】 The joint body 46 connects a fixed cylindrical member 51 at the base end and a movable cylindrical member 53 at the tip end using a known spherical connecting mechanism 54, allowing them to tilt up, down, left, and right within a certain angular range. A curved flange 50 is formed at the end of the fixed cylindrical member 51, and the joint body 46 is connected to the upper manhole member 31 by bonding the curved flange 50 around the communication opening 38 of the upper manhole member 31. A receiving opening 52 into which a mounting pipe 47 is inserted is formed at the end of the movable cylindrical member 53. 【0036】 The mounting pipe 47 is a cylindrical resin member, and as shown in Figures 5 and 7, its tip is an inlet insertion portion 55 for inserting into the inlet pipe 10, and its other end is a socket insertion portion 56 for inserting into the socket 52 of the joint body 46. The inlet insertion portion 55 has an outer diameter approximately equal to the inner diameter of the inlet pipe 10, and the inlet-side joint 23 is connected to the inlet 13 by inserting the inlet insertion portion 55 into the inlet pipe 10 from the inlet 13 side and tightly fitting it into the inlet pipe 10. 【0037】 Here, when the inlet-side joint 23 is connected to the inlet 13, the fitting length L2 (see Figure 7) between the inlet insertion portion 55 and the inflow pipe 10 is configured to be shorter than the movable range L1 (see Figure 6) of the outlet-side joint 24 that can move forward and backward relative to the outlet 14. Thus, in this embodiment, by making the movable range L1 of the outlet-side joint 24 longer than the fitting length L2 between the inlet insertion portion 55 and the inflow pipeline 10, the entire outlet insertion portion 40 of the outlet-side joint 24 can be inserted into the outflow pipeline 11 (see Figure 6(B)), thereby widening the distance between the repair manhole member 22 connected to the outlet-side joint 24 and the inlet 13 from the distance at which the repair manhole member 22 and the inlet 13 are connected by the inlet-side joint 23 to a distance at which the inlet-side joint 23 can be positioned between the repair manhole member 22 and the inlet 13 without interfering with the repair manhole member 22 or the inlet 13. 【0038】 In this embodiment, the entire length L2 of the inlet insertion portion 55 is inserted into the inflow pipe 10 to connect the inlet-side joint 23 to the inlet 13 (see Figure 7). However, it is also possible to connect the inlet-side joint 23 to the inlet 13 with only a portion of the inlet insertion portion 55 inserted into the inflow pipe 10, in which case the fitting length may be shorter than the entire length L2 of the inlet insertion portion 55. However, in either case, the fitting length between the inlet-side joint 23 and the inflow pipe 10 will not exceed the length that can be physically inserted into the inflow pipe 10 (the entire length L2 of the inlet insertion portion 55). Therefore, if the above-mentioned movable range L1 is configured to be longer than the entire length L2 of the inlet insertion portion 55, the fitting length between the inlet insertion portion 55 and the inflow pipe 10 will be shorter than the above-mentioned movable range L1, regardless of how the inlet-side joint 23 and the inlet 13 are connected. 【0039】 The following describes a repair method for repairing the first part 1 using the repair structure 20 described above. The repair method in this embodiment is carried out by performing the following steps (1) to (3) in order. (1) Pre-installation process (2) Installation process (3) Post-installation process 【0040】 In the pre-installation process, the invert 15, cover frame 6, and cover body 7 are removed from the manhole 1 from the state shown in Figure 1, making it easy to install the repair structure 20, as shown in Figure 8. Specifically, by removing the invert 15, a substantially horizontal installation surface 44 is formed at the bottom of the manhole 1 on which the lower manhole member 30 is placed. The invert 15 can be removed, for example, by scraping or chipping it with a tool. It is also acceptable to remove only the part of the invert 15 that would obstruct the installation of the repair structure 20. The height of the installation surface 44 is set so that the outlet-side joint 24 can be connected to the outlet 14. After removing the invert 15, the height of the installation surface 44 may be adjusted or the surface leveled with mortar or soil. The cover frame 6 and cover body 7 can be removed, for example, by digging around the manhole 1 and cutting the upper ends of the side walls 3 and sloping walls 4 of the manhole 1 in a transverse manner. Furthermore, the cover frame 6 and cover body 7 may be removed after the installation of the repair structure 20, provided that they do not interfere with the installation of the repair structure 20. 【0041】 In the installation process, the repair structure 20 is installed inside the manhole 1. Specifically, the repair manhole member 22 is installed inside the manhole 1, and the repair manhole member 22 is connected to the inlet 13 and outlet 14 via the inlet-side joint 23 and the outlet-side joint 24. The repair structure 20 is provided to the contractor as an assembly-type manhole repair kit in which the lower manhole member 30, upper manhole member 31, inlet-side joint 23, and outlet-side joint 24 are separated, and in this installation process, it is assembled by the contractor and installed inside the manhole 1. The installation process is a key part of the present invention and will be described in detail below. 【0042】 The installation process is carried out by sequentially executing the following steps (2a) to (2c). (2a) Outlet connection process (2b) Assembly process of the manhole members (2c) Inlet connection process Here, the outlet connection process and the manhole member assembly process correspond to the first process according to the present invention, and the inlet connection process corresponds to the second process according to the present invention. 【0043】 In the outlet connection process, starting from the state shown in Figure 8, the outlet-side joint 24 is connected to the lower manhole member 30 and the outlet 14, respectively, and the repair manhole member 22 (lower manhole member 30) and the outlet 14 are connected as shown in Figure 9. Specifically, the lower manhole member 30 and the outlet-side joint 24 are placed in the manhole 1, and the outlet insertion portion 40 of the outlet-side joint 24 is inserted from the outlet 14 into the outflow pipeline 11, thereby connecting the outlet-side joint 24 and the outlet 14. Note that the lower manhole member 30 and the outlet-side joint 24 are connected in advance by inserting the horizontal pipe 35 into the socket 41 outside the manhole 1. This makes the connection work easier than connecting the lower manhole member 30 and the outlet-side joint 24 in the narrow workspace inside the manhole 1. 【0044】 Here, the outlet-side joint 24 is configured to move forward and backward relative to the outlet 14 while maintaining its connection to the outlet 14. Therefore, the lower manhole member 30 connected to the outlet 14 via the outlet-side joint 24 can be moved toward or away from the outlet 14 within the movable range L1 (see Figure 6) of the outlet-side joint 24's movement relative to the outlet 14. Then, in the outlet connection process, as shown in Figure 9, the entire outlet insertion portion 40 of the outlet-side joint 24 is inserted into the outflow pipeline 11, thereby positioning the lower manhole member 30 closer to the outlet 14 than the final installation position shown in Figure 2. In this way, during the outlet connection process, the repair manhole member 22 is positioned close to the outlet 14, and the distance between the lower manhole member 30 and the inlet 13 is widened to such an extent that the inlet-side joint 23 cannot connect the repair manhole member 22 and the inlet 13. This ensures that there is enough space to position the inlet-side joint 23 between the repair manhole member 22 and the inlet 13 without interfering with the manhole 1 or the inflow pipeline 10. 【0045】 In the manhole assembly process, starting from the state shown in Figure 9, the upper manhole member 31 and the inlet-side joint 23 are attached to the already installed lower manhole member 30, and the entire repair structure 20 is installed inside the manhole 1 as shown in Figure 10. Note that the upper manhole member 31 and the inlet-side joint 23 are connected in advance by bonding the curved flange 50 around the communication opening 38 outside the manhole 1. This makes the connection work easier than connecting the upper manhole member 31 and the inlet-side joint 23 in the narrow workspace inside the manhole 1. 【0046】 In the manhole assembly process, when attaching the upper manhole member 31 to the lower manhole member 30, the rotation angle of the upper manhole member 31 is adjusted so that the communication opening 38 (inlet side joint 23) faces the inlet 13, as shown in Figures 10 and 12(A). At this time, the distance between the lower manhole member 30 and the inlet 13 is maintained such that the inlet side joint 23 cannot communicate with the repair manhole member 22 and the inlet 13. Therefore, the upper manhole member 31 can be attached to the lower manhole member 30 without interfering with the side wall 3 of the manhole 1 or the inflow pipe 10, and the inlet side joint 23 can be positioned between the repair manhole member 22 and the inlet 13. 【0047】 In the inlet connection process, the inlet-side joint 23 is connected to the inlet 13, and the inlet-side joint 23 connects the repair manhole member 22 and the inlet 13. Specifically, in the manhole member assembly process, the distance between the lower manhole member 30 and the inlet 13 is maintained such that the inlet-side joint 23 cannot connect the repair manhole member 22 and the inlet 13. As shown in Figures 10 and 12(A), after the upper manhole member 31 is installed, the inlet-side joint 23 is positioned at a distance from the inlet 13. In the inlet connection process, from this state, as shown in Figures 11 and 12(B), the repair manhole member 22 is moved in the direction away from the outlet 14 to its final installation position. As the repair manhole member 22 moves, the inlet-side joint 23 moves from a position away from the inlet 13 toward the inlet 13. Then, when the repair manhole member 22 reaches its final installation position, the distance between the lower manhole member 30 and the inlet 13 narrows to a distance that allows the inlet-side joint 23 to connect the repair manhole member 22 and the inlet 13. The inlet insertion portion 55 of the inlet-side joint 23 is fitted into the inflow pipe 10, connecting the inlet-side joint 23 to the inlet 13. As described above, the movable range L1 (see Figure 6) of the outlet-side joint 24 is longer than the fitting length L2 (see Figure 7) between the inlet insertion portion 55 and the inflow pipe 10. Therefore, in this inlet connection process, the repair manhole member 22 can be moved to a position where the inlet insertion portion 55 and the inflow pipe 10 are fitted together, while maintaining the connection between the outlet 14 and the repair manhole member 22, without the outlet-side joint 24 falling out of the outlet 14. Then, through this inlet connection process, the inlet-side joint 23 and the outlet-side joint 24 are connected to the inlet 13 and outlet 14, respectively, and the installation of the repair structure 20 is completed. 【0048】 In the post-installation process, as shown in Figure 2, filling material 29 is filled into the space between the inner surface of the manhole 1 and the repair structure 20, starting from the state shown in Figure 11. Then, the repair cover frame 26 and the repair cover body 27 are installed on top of the filling material 29. Normally, the repair cover body 27 is installed so that it is at the same height as the removed cover body 7. After installation, backfilling is performed so that the top surface of the repair cover body 27 is flush with the surrounding ground. With this post-installation process, the repair of the manhole 1 is completed. 【0049】 Thus, with this repair method, the inlet-side joint 23 can be connected to the repair manhole member 22 and the inlet 13 without the inlet protruding from the inside to the outside of the manhole member 22. Therefore, the connection work between the repair manhole member and the inlet becomes easier compared to conventional repair methods. 【0050】 As described above, in the repair structure 20 of this embodiment, even when the outlet 14 and the repair manhole member 22 are connected via the outlet-side joint 24, the distance between the repair manhole member 22 and the inlet 13 can be expanded or contracted by moving the repair manhole member 22 closer to or further away from the outlet 14. Furthermore, since the movable range L1 in which the repair manhole member 22 can be moved closer to or further away is configured to be longer than the fitting length L2 between the inlet-side joint 23 and the inflow pipe 10, the distance between the repair manhole member 22 and the inlet 13 can be expanded from a distance in which the inlet-side joint 23 can communicate with the repair manhole member 22 and the inlet 13 to a distance in which the inlet-side joint 23 can be positioned between the repair manhole member 22 and the inlet 13 without interfering with the manhole 1 or the inflow pipe 10. Therefore, in the repair structure 20 of this embodiment, as in the repair method described above, the inlet-side joint 23 is placed between the repair manhole member 22 and the inlet 13 while the distance between the repair manhole member 22 and the inlet 13 is widened, and then the distance between the repair manhole member 22 and the inlet 13 is narrowed, thereby allowing the inlet-side joint 23 to be easily connected to the inlet 13 and the repair manhole member 22. Thus, according to the repair structure 20 of this embodiment, the inlet-side joint 23 can be connected to the repair manhole member 22 and the inlet 13 without the inlet-side joint 23 protruding from the inside of the repair manhole member 22, which has the advantage of making the connection work between the repair manhole member 22 and the inlet 13 easier and allowing the manhole 1 to be easily repaired compared to the conventional configuration. 【0051】 In particular, the repair structure 20 of this embodiment has the advantage that the repair manhole member 22 can be moved toward and away from the outlet 14 by sliding the outlet-side joint 24 in the insertion and removal direction relative to the outflow pipeline 11, and therefore the outlet-side joint 24 can be realized with a simple configuration without using an expandable joint or the like. 【0052】 Furthermore, in this embodiment, since the repair manhole member 22 is composed of two members, an upper manhole member 31 that connects to the inlet-side joint 23 and a lower manhole member 30 that connects to the outlet-side joint 24, there is an advantage that the connection work between the inlet-side joint 23 and the repair manhole member 22 can be performed outside the manhole 1. In other words, if the repair manhole member 22 is a single resin member, in order to avoid the inlet-side joint 23 interfering with the side wall 3 of the manhole 1 or the inflow pipe 10, it is necessary to connect the inlet-side joint 23 and the repair manhole member 22 inside the manhole 1 after connecting the repair manhole member 22 to the outlet 14. However, in the repair structure 20 of this embodiment, as described above, the upper part of the repair manhole member 22 (upper manhole member 31) can be attached after the lower part (lower manhole member 30) of the repair manhole member 22 is connected to the outlet 14, so the inlet-side joint 23 can be connected to the repair manhole member 22 in advance outside the manhole 1. 【0053】 Furthermore, in the manhole 1 of the above embodiment, the inlet 13 and outlet 14 are arranged symmetrically on the manhole 1 in a plan view, and the inlet pipe 10 and outlet pipe 11 are arranged on the same straight line. However, since the repair structure 20 of this embodiment allows adjustment of the horizontal orientation of the inlet-side joint 23, repair is possible even in manhole 1a where, as shown in Figure 13, the inlet 13 and outlet 14 are arranged diagonally opposite each other in a plan view, and the inlet pipe 10 and outlet pipe 11 are not arranged on the same straight line. 【0054】 In particular, the repair structure 20 of this embodiment has the advantage that a wide range of manhole shapes can be repaired because the orientation of the inlet-side joint 23 can be easily adjusted by changing the angle of the upper manhole member 31 relative to the lower manhole member 30. Specifically, the horizontal orientation of the inlet-side joint 23 can be adjusted by horizontally rotating the upper manhole member 31 when attaching it to the lower manhole member 30. In addition, the vertical orientation of the inlet-side joint 23 can be adjusted by elastically deforming the rubber ring 34 of the rubber ring socket 33 and tilting the upper manhole member 31 around its lower end (see Figure 4). 【0055】 Furthermore, the inlet-side joint 23 in this embodiment is a universal joint in which the inlet insertion portion 55 at its tip can be tilted up, down, left, and right. This provides the advantage that the inlet insertion portion 55 can be easily fitted into the inflow pipeline 10 during the connection work between the inlet-side joint 23 and the inlet 13. 【0056】 Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention. 【0057】 For example, the manhole to be repaired according to the present invention is not limited to manhole 1 in the above embodiment. For example, although manhole 1 in the above embodiment has a substantially circular cross-section, the present invention is also applicable to manholes with a cross-section of a shape other than circular (for example, a square shape). Furthermore, in manhole 1 in the above embodiment, the inlet pipe 10 and outlet pipe 11 are flush with the side wall 3 of manhole 1, but the present invention is also applicable to manholes where the inlet pipe 10 and outlet pipe 11 protrude inward from the side wall 3. 【0058】 Furthermore, the repair structure for the manhole according to the present invention is not limited to the repair structure 20 of the above embodiment. For example, in the above embodiment, the outlet-side joint 24 slides its tip inside the outflow pipeline 11, allowing the repair manhole member 22 to move toward or away from the outlet 14 while maintaining the connection between the outlet 14 and the repair manhole member 22. However, the outlet-side joint 24 may be configured as an expandable joint, such as a so-called reciprocating joint, and the expansion and contraction of the outlet-side joint 24 may cause the repair manhole member 22 to move toward or away from the outlet 14. 【0059】 Furthermore, the connection mechanism between the repair manhole member 22 and the outlet 14 by the outlet-side joint 24 is not limited to the form of the above embodiment and can be modified as appropriate. For example, the base end of the outlet-side joint 24 may be inserted into a socket provided at the end of the horizontal pipe 35, or the base end of the outlet-side joint 24 may be bonded to an opening formed on the side surface of the repair manhole member 22. In addition, the outlet-side joint 24 may be integrated with the repair manhole member 22 (lower manhole member 30). 【0060】 Furthermore, the connection mechanism between the repair manhole member 22 and the inlet 13 by the inlet-side joint 23 is not limited to the form of the above embodiment and can be modified as appropriate. For example, in the above embodiment, the inlet-side joint 23 is indirectly connected to the inlet 13 via the connecting pipe 47, but the tip of the joint body 46 may be directly connected to the inlet 13. Also, in the above embodiment, the tip of the inlet-side joint 23 is inserted and connected to the inlet 13, but the tip of the inlet-side joint 23 may be joined to the side wall 3 surrounding the inlet 13 to connect it to the inlet 13. In addition, in a configuration where the inflow pipe 10 protrudes into the manhole 1, the inlet 13 (inflow pipe 10) may be inserted and connected to the tip of the inlet-side joint 23. 【0061】 Furthermore, regarding the repair method in the above embodiment, each step can be appropriately modified or omitted without changing the spirit of the present invention. For example, in the repair method of the above embodiment, the lid 7 and lid frame 6 of the manhole 1 are removed and a repair lid frame 26 and a repair lid 27 are installed. However, the lid 7 and lid frame 6 of the manhole 1 may be left in place and used after the repair. Also, if the lid 7 and lid frame 6 are left in place and used after the repair, it is not necessary to completely fill the inside of the manhole 1 with the filler material 29. 【0062】 Furthermore, in the repair method of the above embodiment, after connecting the inlet-side joint 23 to the repair manhole member 22, the distance between the repair manhole member 22 and the inlet 13 is narrowed and the inlet-side joint 23 is connected to the inlet 13 (see Figures 10 and 11). Alternatively, the distance between the repair manhole member 22 and the inlet 13 may be narrowed after connecting the inlet-side joint 23 to the inlet 13 and the inlet-side joint 23 may be connected to the repair manhole member 22. Alternatively, the joint body 46 may be connected to the repair manhole member 22 and the mounting pipe 47 may be connected to the inlet 13, and then the distance between the repair manhole member 22 and the inlet 13 may be narrowed and the joint body 46 and the mounting pipe 47 may be connected. [Explanation of symbols] 【0063】 1,1a 2 Bottom wall 3 side wall 4 Slanted wall 5 Openings 6 Lid frame 7 Lid 10 Inflow pipe 11 Outflow pipe 13 Inlet 14 Outlet 15 Invert 20,20a Repair structure 22 Repair manhole components 23,23a Inlet side joint 24 Outlet side joint 25 Opening 26 Repair cover frame 27 Repair cover 29 Filling material 30 Lower manhole member 31 Upper manhole member 33 Rubber ring socket 34 rubber rings 35 Horizontal pipe 36 Guide surface 38 connecting ports 40 Outlet insertion part 41 Socket (Outlet side joint) 42 O-rings 43 Installation surface 46 Fitting body 47 Mounting pipe 50 Curved flange 51 Fixed cylindrical member 52 socket 53 Movable cylindrical member 54 Spherical connection mechanism 55 Inlet insertion section 56 Receptacle insertion part
Claims
[Claim 1] A repair structure for a manhole in which water flows in from an inlet opening on one side and out into an outlet opening on the other side, A bottomed cylindrical repair manhole member installed inside the aforementioned manhole, An inlet-side joint is provided, which connects the repair manhole member and the inlet by connecting one end to the inlet and the other end to the repair manhole member, By connecting one end to the outlet and the other end to the repair manhole member, an outlet-side joint is formed that connects the repair manhole member and the outlet. Equipped with, The aforementioned inlet-side joint is connected to the inlet by fitting one end into the inlet pipe from the inlet side. The outlet-side joint allows the repair manhole member to move toward or away from the outlet within a predetermined range of motion while maintaining the connection between the outlet and the repair manhole member. A repair structure for a manhole, characterized in that the fitting length between one end of the inlet-side joint and the inflow pipe is shorter than the movable range. [Claim 2] The aforementioned outlet side joint is, It is connected to the outlet by inserting one end into the outlet pipeline from the outlet, The repair structure for a manhole according to claim 1, characterized in that, while connected to the outlet, one end can be slid in the insertion / removal direction within the movable range in the outflow pipeline. [Claim 3] The repair manhole member comprises a bottomed cylindrical lower manhole member and a bottomless cylindrical upper manhole member attached to the upper end of the lower manhole member. The repair structure for a manhole according to claim 1 or 2, characterized in that the other end of the outlet-side joint is connected to the lower manhole member, and the other end of the inlet-side joint is connected to the upper manhole member. [Claim 4] The aforementioned upper manhole member has a cylindrical shape, The repair structure for a manhole according to claim 3, characterized in that the portion of the lower manhole member to which the lower end of the upper manhole member is attached is a rubber ring receiving opening. [Claim 5] The repair structure for a manhole according to claim 1 or 2, characterized in that the inlet side joint is a universal joint. [Claim 6] A manhole repair kit for repairing a manhole where water flows in through an inlet opening on one side and out into an outlet opening on the other side, A bottomed cylindrical repair manhole member installed inside the aforementioned manhole, An inlet-side joint is provided, which connects the repair manhole member and the inlet by connecting one end to the inlet and the other end to the repair manhole member, By connecting one end to the outlet and the other end to the repair manhole member, an outlet-side joint is formed that connects the repair manhole member and the outlet. Includes, The aforementioned inlet-side joint is connected to the inlet by fitting one end into the inlet pipe from the inlet side, The outlet-side joint allows the repair manhole member to move toward or away from the outlet within a predetermined range of motion while maintaining the connection between the outlet and the repair manhole member. A repair kit characterized in that the fitting length between one end of the inlet-side joint and the inflow pipe is shorter than the movable range. [Claim 7] Inside the manhole, water flows in through an inlet opening on one side and out into the outlet pipe through an outlet opening on the other side. A cylindrical repair box component with a bottom, An inlet-side joint is provided, which connects the repair manhole member and the inlet by connecting one end to the inlet and the other end to the repair manhole member, By connecting one end to the outlet and the other end to the repair manhole member, an outlet-side joint is formed that connects the repair manhole member and the outlet. A method for repairing a manhole where a manhole is installed, The outlet-side joint allows the repair manhole member to move toward or away from the outlet within a predetermined range of motion while maintaining the connection between the outlet and the repair manhole member. The first step involves connecting the outlet-side joint to the repair manhole member and the outlet, respectively, and positioning the inlet-side joint between the repair manhole member and the inlet, such that the inlet-side joint maintains a distance between the repair manhole member and the inlet that prevents communication between them. Following the first step, the second step involves moving the repair manhole member away from the outlet while the outlet-side joint maintains the connection between the outlet and the repair manhole member, thereby adjusting the distance between the repair manhole member and the inlet so that the inlet-side joint can connect the repair manhole member and the inlet, thereby connecting the repair manhole member and the inlet via the inlet-side joint. A method for repairing a bath, characterized by including the following.