Method for manufacturing invert members and method for repairing existing invert members

Abstract

To reduce the amount of work required when repairing existing invert members installed inside manholes. [Solution] The method for manufacturing the invert member 50 is a manufacturing method for manufacturing an invert member 50 to repair an existing invert member 30 installed in a manhole 10. The manufacturing method includes an acquisition step S101 in which an internal information acquisition means 120 is inserted into a straight cylindrical portion 20 forming the manhole 10 and invert information D1 relating to the existing invert member 30 is acquired using the internal information acquisition means 120; a drawing data creation step S105 in which manufacturing drawing data DT1 for manufacturing the invert member 50 is created based on the invert information D1; and an invert manufacturing step S107 in which the invert member 50 is manufactured based on the manufacturing drawing data DT1.

Description

【Technical Field】 【0001】 The present invention relates to a method for manufacturing an invert member and a method for repairing an existing invert member. 【Background Art】 【0002】 For example, Patent Document 1 discloses a manhole repair method for repairing an existing manhole. The existing manhole includes a cylindrical straight wall portion formed with a manhole inlet and a manhole outlet, and an existing floor slab disposed at the bottom within the straight wall portion and provided with an existing invert. 【0003】 In this manhole repair method, first, the existing invert within the existing manhole is removed to expose the existing floor slab. Then, a synthetic resin pipe having an outer diameter smaller than the inner diameter of the straight wall portion of the existing manhole is erected on the existing floor slab within the existing manhole. Inlets and outlets are formed in this synthetic resin pipe. When installing the synthetic resin pipe on the existing floor slab, the inlet of the synthetic resin pipe and the manhole inlet are connected by an inflow connecting member, and the outlet of the synthetic resin pipe and the manhole outlet are connected by an outflow connecting member. Then, the gap between the inner peripheral surface of the straight wall portion and the outer peripheral surface of the synthetic resin pipe is filled with a backfill material, and a new invert is installed on the existing bottom slab within the synthetic resin pipe, thereby repairing the existing manhole. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Patent No. 6636394 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 Incidentally, existing manholes can have various shapes of existing inverts. For example, the number or diameter of manhole inlets, the number or diameter of manhole outlets, and the position of the manhole outlets relative to the inlets may differ for each existing manhole, so the shape of the existing invert may also differ. Therefore, it was sometimes necessary to process synthetic resin pipes on-site to create a shape that fits the existing invert. As a result, this required extra work and increased the number of work steps. 【0006】 The present invention has been made in view of the above, and its purpose is to provide a method for manufacturing an invert member and a method for repairing an existing invert member that can reduce the number of work hours required when repairing an existing invert member installed in a manhole. [Means for solving the problem] 【0007】 The method for manufacturing an invert member according to the present invention is a manufacturing method for manufacturing an invert member for repairing an existing invert member installed in a manhole. The manufacturing method includes an acquisition step, a drawing data creation step, and an invert manufacturing step. In the acquisition step, an internal information acquisition means is inserted into the straight cylindrical portion forming the manhole, and invert information relating to the existing invert member is acquired using the internal information acquisition means. In the drawing data creation step, manufacturing drawing data for manufacturing the invert member is created based on the invert information. In the invert manufacturing step, the invert member is manufactured based on the manufacturing drawing data. 【0008】 According to the above-described method for manufacturing the invert member, the invert information is obtained by actually inserting the internal information acquisition means into the straight cylinder section, and therefore is information that is specific to the existing invert member. Thus, by manufacturing the invert member based on the invert information, it is possible to manufacture an invert member that corresponds to the existing invert member. Consequently, when on-site workers repair an existing invert member, they only need to install, for example, a pre-manufactured invert member into the straight cylinder section, thus reducing the amount of work required when repairing an existing invert member. 【0009】 According to a preferred embodiment of the present invention, a method for manufacturing an invert member includes a three-dimensional model creation step. In the three-dimensional model creation step, a three-dimensional model of the invert member is created based on the invert information. In the drawing data creation step, manufacturing drawing data is created based on the three-dimensional model of the invert member. 【0010】 According to the above embodiment, by looking at the three-dimensional model, it is easy to confirm whether the three-dimensional model is a model that reproduces the existing invert member. Therefore, since manufacturing drawing data is created from the three-dimensional model that has been confirmed to reproduce the existing invert member, it is easy to manufacture an invert member that reproduces the existing invert member. 【0011】 According to another preferred embodiment of the present invention, the straight cylindrical portion forming the manhole has an inlet and an outlet. The existing invert member has an invert inlet connected to the inlet, an invert outlet connected to the outlet, and an invert body connecting the invert inlet and the invert outlet. The invert information includes at least the inlet position of the invert inlet relative to the straight cylindrical portion, the outlet position of the invert outlet relative to the straight cylindrical portion, the size of the invert inlet, the size of the invert outlet, and the gradient from the invert inlet to the invert outlet. 【0012】 According to the above embodiment, since the inlet position, outlet position, size of the invert inlet, size of the invert outlet, and gradient are included in the invert information, an invert member that reproduces an existing invert member can be manufactured based on the invert information. 【0013】 According to another preferred embodiment of the present invention, the existing invert member has a deteriorated portion. In the drawing data creation step, the manufacturing drawing data is created for the existing invert member from which the deteriorated portion has been removed. 【0014】 According to the above embodiment, the deteriorated portion is the part that causes the existing invert member to require repair. Therefore, by manufacturing the invert member without reproducing the deteriorated portion, it is possible to manufacture an invert member that is reproduced to the state of the existing invert member before deterioration. 【0015】 According to another preferred embodiment of the present invention, the internal information acquisition means is a camera that photographs the existing invert member. 【0016】 According to the above embodiment, invert information of an existing invert member can be obtained from still images or videos of the existing invert member captured using a camera. 【0017】 According to another preferred embodiment of the present invention, the invert manufacturing process involves using a 3D printer to manufacture the invert member based on the manufacturing drawing data. 【0018】 According to another preferred embodiment of the present invention, invert members can be easily manufactured from manufacturing drawing data using a 3D printer. 【0019】 The method for repairing an existing invert member according to the present invention is a repair method for repairing the existing invert member by using the invert member manufactured by any of the above-described manufacturing methods of the invert member. The repair method includes a removal step and an installation step. In the removal step, the existing invert member provided in the manhole is removed. In the installation step, the invert member manufactured in the invert manufacturing step is installed in the manhole. 【0020】 According to the method for repairing the existing invert member, the existing invert member can be repaired by installing a previously manufactured invert member in the manhole from which the existing invert member has been removed. Therefore, since it is not necessary to manufacture an invert member for repairing the existing invert member on site, the number of man-hours for repairing the existing invert member can be reduced. 【0021】 According to a preferred embodiment of the present invention, the straight cylindrical portion forming the manhole and the existing invert member are made of concrete. The invert member manufactured in the invert manufacturing step is made of resin. 【0022】 According to the above aspect, even when the material forming the straight cylindrical portion and the existing invert member is different from the material forming the invert member manufactured for repairing the existing invert member, the existing invert member can be repaired by installing the invert member in the manhole. 【Effects of the Invention】 【0023】 According to the present invention, it is possible to provide a method for manufacturing an invert member and a method for repairing an existing invert member that can reduce the number of man-hours when repairing an existing invert member provided in a manhole. 【Brief Description of the Drawings】 【0024】 [Figure 1] It is a plan view showing a drainage pipe, a straight cylindrical portion, and an existing invert member. [Figure 2]It is a cross-sectional view showing a drainage pipe, a straight pipe portion, and an existing invert member in the II-II cross-section of FIG. 1. [Figure 3] It is a perspective view showing an invert member used when repairing an existing invert member. [Figure 4] It is a flowchart showing a method for manufacturing an invert member. [Figure 5] It is a block diagram showing a manufacturing system. [Figure 6] It is a diagram showing an example of invert information. [Figure 7] It is a flowchart showing a method for repairing an existing invert member. [Figure 8] It is a cross-sectional view showing a drainage pipe and a straight pipe portion in a state where an existing invert member has been removed from the straight pipe portion. [Figure 9] It is a cross-sectional view showing a drainage pipe, a straight pipe portion, and an invert member in a state where an invert member is installed in the straight pipe portion. 【Mode for Carrying Out the Invention】 【0025】 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The embodiment described here is of course not intended to particularly limit the present invention. In the following drawings, members and parts having the same function are denoted by the same reference numerals, and overlapping descriptions are omitted or simplified as appropriate. 【0026】 Figure 1 is a plan view showing the drainage pipe 5, the straight pipe section 20, and the existing invert member 30. Figure 2 is a cross-sectional view showing the drainage pipe 5, the straight pipe section 20, and the existing invert member 30 in the section II-II of Figure 1. Figure 3 is a perspective view showing the invert member 50 used when repairing the existing invert member 30. Here, the manufacturing method of the invert member 50 (see Figure 3) and the repair method of the existing invert member 30 (see Figure 2) according to this embodiment will be described. In this embodiment, the existing invert member 30 can be repaired by sequentially performing the manufacturing method of the invert member 50 and the repair method of the existing invert member 30. The manufacturing method of the invert member 50 manufactures the invert member 50 to be used when repairing the existing invert member 30. In the repair method of the existing invert member 30, the existing invert member 30 is repaired by replacing the existing invert member 30 with the invert member 50 manufactured in the above manufacturing method. 【0027】 Next, an example of an existing invert member 30 to be repaired will be described. In this embodiment, as shown in Figure 2, the existing invert member 30 is installed in a manhole 10. A manhole 10 is a hole formed from the ground downwards into the ground. For example, a drainage pipe 5 connected to a so-called sewer main (not shown) is buried underground. The drainage pipe 5 is arranged horizontally and is sloped downwards, for example, towards the sewer main. The drainage pipe 5 is composed of, for example, multiple pipes and joints that connect the multiple pipes. Drainage flows through the drainage pipe 5. Here, "drainage" means discharged water. Drainage includes so-called sewage and rainwater. Sewage is domestic water discharged from drainage facilities (not shown) such as toilets, baths, and kitchen sinks. 【0028】 In this embodiment, as shown in Figure 1, the drainage pipeline 5 has an upstream drainage pipeline 6 and a downstream drainage pipeline 7. Drainage flows through the upstream drainage pipeline 6 and the downstream drainage pipeline 7. The downstream drainage pipeline 7 is located downstream of the upstream drainage pipeline 6, in other words, on the side of the main sewer pipe. In Figure 2, the left side is the upstream side and the right side is the downstream side. Here, the upstream end of the upstream drainage pipeline 6 is connected to the drainage facility. The downstream end of the downstream drainage pipeline 7 is connected to the main sewer pipe. 【0029】 The manhole 10 is an opening for on-site workers to inspect the inside of the drainage pipeline 5. The manhole 10 is a so-called manhole. As shown in Figure 2, the manhole 10 is an opening that extends downward from the ground and communicates with the inside of the drainage pipeline 5. The manhole 10 opens upward. In this embodiment, the manhole 10 is formed by a straight pipe section 20. The straight pipe section 20 is a cylindrical (for example, cylindrical) pipe that extends vertically. The straight pipe section 20 has a bottom. The straight pipe section 20 is connected to the drainage pipeline 5. In this embodiment, the straight pipe section 20 is located between the upstream drainage pipeline 6 and the downstream drainage pipeline 7 of the drainage pipeline 5. The straight pipe section 20 is connected to the downstream end of the upstream drainage pipeline 6 and the upstream end of the downstream drainage pipeline 7. 【0030】 In this embodiment, as shown in Figure 2, the straight cylindrical portion 20 has a bottom portion 21 and side portions 22. The bottom portion 21 constitutes the bottom of the straight cylindrical portion 20. The bottom portion 21 is, for example, circular in shape. The side portions 22 extend upward from the bottom portion 21. Here, the side portions 22 are connected to the circumferential end of the bottom portion 21 and rise up from that circumferential end. The side portions 22 are, for example, cylindrical in shape. The upper end of the side portions 22 is located at ground level. In this embodiment, the manhole 10 is a hole surrounded by the bottom portion 21 and the side portions 22. 【0031】 In this embodiment, the straight cylindrical section 20 has an inlet 25 and an outlet 26. The inlet 25 and outlet 26 are formed on the side section 22. The upstream drainage pipe 6 of the drainage pipeline 5 is connected to the inlet 25. The downstream drainage pipe 7 of the drainage pipeline 5 is connected to the outlet 26. Therefore, the manhole 10 formed in the straight cylindrical section 20 communicates with the drainage pipeline 5 through the inlet 25 and outlet 26. Here, as shown in Figure 1, the inlet 25 and outlet 26 face each other in a plan view. In other words, in a plan view, the central axis of the inlet 25 and the central axis of the outlet 26 coincide. Also, as shown in Figure 2, the inlet 25 is positioned higher than the outlet 26. Here, the lower end of the inlet 25 is located above the lower end of the outlet 26. However, the positions of the inlet 25 and outlet 26 relative to the side section 22 are not particularly limited. The position of the outlet 26 relative to the inlet 25 is not particularly limited. In other words, the inlet 25 and the outlet 26 do not have to be opposite each other. The inlet 25 and the outlet 26 may be at the same height. 【0032】 In this embodiment, as shown in Figure 2, the outlet 26 is larger than the inlet 25. That is, the diameter of the outlet 26 is larger than the diameter of the inlet 25. However, the inlet 25 and the outlet 26 may be the same size, for example, they may have the same diameter. Here, there is one inlet 25 and one outlet 26. However, there may be multiple inlets 25 and multiple outlets 26. 【0033】 In this embodiment, as shown in Figure 2, the existing invert member 30 is installed inside the manhole 10. The existing invert member 30 is installed inside the straight cylindrical section 20. Here, the existing invert member 30 is placed on the bottom 21 of the straight cylindrical section 20. The existing invert member 30 is fixed to the straight cylindrical section 20 (for example, the bottom 21 of the straight cylindrical section 20). The method of fixing the existing invert member 30 to the straight cylindrical section 20 is not particularly limited; for example, the existing invert member 30 and the straight cylindrical section 20 are fixed together by adhesive. 【0034】 The configuration of the existing invert member 30 is not particularly limited. In this embodiment, as shown in Figure 1, the existing invert member 30 has an invert 31 and an inclined portion 35. As shown in Figure 2, the invert 31 connects the inlet 25 and outlet 26 formed in the straight cylindrical portion 20 within the manhole 10. The invert 31 is groove-shaped. In other words, the invert 31 is a semi-tube shape that is recessed downwards. 【0035】 In this embodiment, the invert 31 has an invert inlet 32, an invert outlet 33, and an invert body 34. The invert inlet 32 ​​is connected to the inlet 25 of the straight pipe section 20. The invert outlet 33 is connected to the outlet 26 of the straight pipe section 20. The number of invert inlets 32 is the same as the number of inlets 25. The number of invert outlets 33 is the same as the number of outlets 26. The invert inlets 32 have a size corresponding to the size of the inlet 25 and are positioned at a location corresponding to the inlet 25. The invert outlets 33 have a size corresponding to the size of the outlet 26 and are positioned at a location corresponding to the outlet 26. In this embodiment, the size of the invert inlets 32 and invert outlets 33 refers to the width. Here, width refers to the length in the direction perpendicular to the axial direction in the invert inlet 32 ​​(or invert outlet 33) in a plan view. For example, the width of the invert inlet 32 ​​is the same as the diameter of the inlet 25. The width of the invert outlet 33 is the same as the diameter of the outlet 26. The sizes of the invert inlet 32 ​​and the invert outlet 33 may differ. In this embodiment, the invert outlet 33 is larger than the invert inlet 32 ​​and wider than the invert inlet 32. Also, here the inlet 25 is located higher than the outlet 26, so the invert inlet 32 ​​is located higher than the invert outlet 33. In other words, the bottom of the invert inlet 32 ​​is located higher than the bottom of the invert outlet 33. 【0036】 The invert body 34 connects the invert inlet 32 ​​and the invert outlet 33. In this embodiment, the invert body 34 has a shape that extends from the invert inlet 32 ​​toward the invert outlet 33. The shape of the invert body 34 is set according to the positional relationship between the invert inlet 32 ​​and the invert outlet 33, in other words, the positional relationship between the inlet 25 and the outlet 26. The shape of the invert body 34 is also set according to the number of inlets 25 and the number of outlets 26. As described above, in this embodiment, the invert inlet 32 ​​and the invert outlet 33 are opposite each other, and there is one inlet 25 and one outlet 26. Therefore, as shown in Figure 1, the invert body 34 has a shape that extends in a straight line in a plan view. However, at least a part of the invert body 34 may be curved. Furthermore, as shown in Figure 2, since the invert inlet 32 ​​is positioned higher than the invert outlet 33, the invert body 34 is sloped downward from the invert inlet 32 ​​towards the invert outlet 33, and has a gradient that slopes downward towards the invert outlet 33. In addition, the size (in other words, width) of the invert body 34 gradually increases from the invert inlet 32 ​​towards the invert outlet 33. 【0037】 The inclined section 35 constitutes the upper surface portion of the existing invert member 30, excluding the invert 31. The inclined section 35 is provided at both ends in the width direction of the invert 31. The inclined section 35 is connected to the upper end of the invert 31. The inclined section 35 slopes upward as it moves away from the invert 31. This makes it possible to make it easier for drainage flowing into the invert 31 to flow along the inclined section 35 and into the invert 31, even if it rides up onto the inclined section 35. Therefore, it is possible to make it difficult for drainage to remain in the inclined section 35. 【0038】 In this embodiment, the straight cylindrical section 20 (e.g., bottom section 21, side section 22) forming the manhole 10, and the existing invert member 30 (e.g., the inclined section 35, and the invert inlet section 32, invert outlet section 33, and invert main body section 34 of the invert 31) are made of concrete. However, the material used to form the straight cylindrical section 20 and the existing invert member 30 is not particularly limited. Also, in this embodiment, the drainage pipeline 5 (e.g., the upstream drainage pipeline 6, the downstream drainage pipeline 7) is made of concrete, but the material used to form the drainage pipeline 5 is not particularly limited. For example, the drainage pipeline 5 may be a so-called ceramic pipe, or it may be made of resin such as polyvinyl chloride (PVC). 【0039】 The configuration of the existing invert member 30 has been described above. Incidentally, wastewater discharged from the drainage facility flows through the drainage pipe 5 and the existing invert member 30 and is discharged into the main sewer pipe. A large amount of wastewater flows through the invert 31 of the existing invert member 30. As a result, the existing invert member 30 may deteriorate, for example, due to long-term use. For this reason, as shown in Figure 2, the existing invert member 30 has deteriorated parts 40. Deteriorated parts 40 refer to deteriorated parts of the existing invert member 30. Deteriorated parts 40 are formed, for example, on the invert 31. However, deteriorated parts 40 may also be formed on the inclined part 35. In the example in Figure 2, there is one deteriorated part 40, but there may be multiple deteriorated parts 40. Deteriorated parts 40 are, for example, deformed parts of a new existing invert member 30, and are deteriorated parts that make it difficult for wastewater to flow smoothly. The deteriorated portion 40 may be, for example, a recessed portion or a damaged portion such as a crack. 【0040】 When the existing invert member 30 deteriorates in this way, it is repaired. At this time, the existing invert member 30 is replaced with, for example, a new invert member. As mentioned above, the shape of the existing invert member 30 (especially the invert 31) varies. Therefore, conventionally, when repairing the existing invert member 30, on-site workers would look at the existing invert member 30 while performing plastering work at the site where the existing invert member 30 is installed, confirming its shape, and then manufacture the replacement invert member. Furthermore, it is difficult for on-site workers to perform the task of confirming the shape of the existing invert member 30 because they have to enter the manhole 10. Therefore, conventionally, the manufacturing of replacement invert members was time-consuming, which sometimes increased the number of work steps for on-site workers. Furthermore, conventionally, when repairing existing invert members 30, on-site workers may repair the existing invert members 30 by reconstructing them, such as filling in deteriorated parts 40, during plastering work. Even in this case, on-site workers have to enter the manhole 10 to work, which is time-consuming and can increase the number of work steps for the on-site workers. 【0041】 Therefore, this embodiment provides a method for manufacturing an invert member 50 (see Figure 3) used when repairing an existing invert member 30. Next, the method for manufacturing the invert member 50 (hereinafter also simply referred to as the manufacturing method) will be described. In the manufacturing method according to this embodiment, an invert member 50 for repairing an existing invert member 30 installed in a manhole 10 is manufactured. The invert member 50 is manufactured in advance at a location different from the site before the work to repair the existing invert member 30 is carried out. This invert member 50 is a reproduction of the existing invert member 30. Here, the invert member 50 manufactured in advance is brought to the site, and the site worker can repair the existing invert member 30 by replacing the existing invert member 30 with the invert member 50. 【0042】 In this embodiment, the invert member 50 shown in Figure 3 is a reproduction of the existing invert member 30 shown in Figure 2. The invert member 50 corresponds to the existing invert member 30. As shown in Figure 3, the invert member 50 comprises an invert 51 and an inclined portion 55. In the invert member 50, the invert 51 and the inclined portion 55 correspond to the invert 31 and inclined portion 35 of the existing invert member 30, respectively. The invert 51 reproduces the invert 31 of the existing invert member 30 and has the same shape as the invert 31. The inclined portion 55 reproduces the inclined portion 35 of the existing invert member 30 and has the same shape as the inclined portion 35. In this embodiment, the invert 51 of the invert member 50 comprises an invert inlet 52, an invert outlet 53, and an invert main body 54. In the invert member 50, the invert inlet 52, invert outlet 53, and invert body 54 correspond to the invert inlet 32, invert outlet 33, and invert body 34 of the existing invert member 30, respectively. The invert inlet 52 replicates the invert inlet 32 ​​of the existing invert member 30 and has the same shape as the invert inlet 32. The invert outlet 53 replicates the invert outlet 33 of the existing invert member 30 and has the same shape as the invert outlet 33. The invert body 54 replicates the invert body 34 of the existing invert member 30 and has the same shape as the invert body 34. Note that the invert member 50 does not replicate the deteriorated portion 40 (see Figure 2) of the existing invert member 30. In the invert member 50, the deteriorated portion 40 has been removed. 【0043】 Figure 4 is a flowchart showing the manufacturing method of the invert member 50. As shown in Figure 4, the manufacturing method of the invert member 50 includes an acquisition step S101, a three-dimensional model creation step S103, a drawing data creation step S105, and an invert manufacturing step S107. By sequentially executing the acquisition step S101, the three-dimensional model creation step S103, the drawing data creation step S105, and the invert manufacturing step S107, an invert member 50 (see Figure 3) used when repairing an existing invert member 30 can be manufactured. 【0044】 Figure 5 is a block diagram of the manufacturing system 100. The manufacturing method of the invert member 50 according to this embodiment is embodied by a manufacturing system 100 (see Figure 5) for manufacturing the invert member 50. Here, as shown in Figure 5, the manufacturing system 100 includes a drawing creation device 110, a camera 120, and a 3D printer 130. Here, the drawing creation device 110 is communicatively connected to the camera 120 and the 3D printer 130. For example, the drawing creation device 110 is connected to the camera 120 and the 3D printer 130 via the internet. Here, the acquisition process S101, the three-dimensional model creation process S103, and the drawing data creation process S105 of Figure 4 are embodied using the drawing creation device 110 and the camera 120. The invert manufacturing process S107 of Figure 4 is embodied using the 3D printer 130. 【0045】 The drawing creation device 110 in Figure 5 is a device for creating a three-dimensional model M1 and manufacturing drawing data DT1 for manufacturing the invert member 50. The drawing creation device 110 is implemented by, for example, a desktop or laptop personal computer. The drawing creation device 110 may be implemented by a dedicated computer or a general-purpose computer. In this embodiment, the drawing creation device 110 functions as such by installing CAD (Computer Aided Design) software (in other words, computer-aided design software) for creating the three-dimensional model M1 and manufacturing drawing data DT1 on a personal computer. Here, the three-dimensional model M1 and manufacturing drawing data DT1 are created using CAD software. 【0046】 As shown in Figure 5, the drawing creation device 110 comprises a display screen 111, an operating means 112, and a control device 113. The display screen 111 displays, for example, the CAD software mentioned above. The operating means 112 is operated by the creator who creates the three-dimensional model M1 and the manufacturing drawing data DT1. For example, the creator operates the operating means 112 to launch the CAD software on the display screen 111 and create the three-dimensional model M1 and the manufacturing drawing data DT1. The operating means 112 can be implemented by a keyboard, mouse, or touch panel. 【0047】 The control device 113 is, for example, a microcomputer. The control device 113 includes, for example, an interface, a CPU, ROM, RAM, etc. The control device 113 is electrically connected to the display screen 111 and the operating means 112. In this embodiment, the control device 113 has the CAD software described above installed on it. As shown in Figure 5, the control device 113 includes a storage unit 115, an acquisition unit 116, a three-dimensional model creation unit 117, and a drawing data creation unit 118. Each part of the control device 113 may be implemented by software or hardware. Furthermore, each part of the control device 113 may be implemented by one or more processors or by circuits. Details of each part of the control device 113 will be described later. 【0048】 In this embodiment, in order to carry out the manufacturing method of the invert member 50, the acquisition step S101 shown in Figure 4 is first performed. In the acquisition step S101, invert information D1 relating to the existing invert member 30 is acquired. Invert information D1 is information relating to each part of the existing invert member 30 (for example, the invert inlet 32 ​​of the invert 31, the invert outlet 33, and the invert main body 34). In this embodiment, a replacement invert member 50 is manufactured based on the invert information D1. 【0049】 The specific information of the invert information D1 is not particularly limited. Figure 6 shows an example of the invert information D1. The invert information D1 includes information about the existing invert member 30 that is necessary when manufacturing the invert member 50 from the existing invert member 30. In this embodiment, as shown in Figure 6, the invert information D1 includes at least the inlet position D11, the outlet position D12, the size D13 of the invert inlet 32, the size D14 of the invert outlet 33, and the gradient D15. The inlet position D11 is the position of the invert inlet 32 ​​relative to the straight cylindrical section 20 that forms the manhole 10. Here, the position is the circumferential position of the straight cylindrical section 20 and the position in the height direction of the straight cylindrical section 20. The inlet position D11 may also be the position of the inlet 25 relative to the straight cylindrical section 20. The outlet position D12 is the position of the invert outlet 33 relative to the straight cylindrical section 20. The outlet position D12 may also be the position of the outlet 26 relative to the straight pipe section 20. Furthermore, the outlet position D12 is the position of the invert outlet 33 relative to the invert inlet 32. In this embodiment, the positional relationship between the invert inlet 32 ​​and the invert outlet 33 can be determined by the inlet position D11 and the outlet position D12. 【0050】 The size D13 of the invert inlet 32 ​​refers to the width of the invert inlet 32. The width of the invert inlet 32 ​​refers to the diameter of the invert inlet 32. The size D13 of the invert inlet 32 ​​can also be expressed as the diameter of the inlet 25. The size D14 of the invert outlet 33 refers to the width of the invert outlet 33. The width of the invert outlet 33 refers to the diameter of the invert outlet 33. The size D14 of the invert outlet 33 can also be expressed as the diameter of the outlet 26. The gradient D15 refers to the slope from the invert inlet 32 ​​to the invert outlet 33. Here, the gradient D15 refers to the slope of the invert main body 34. The gradient D15 can be the inclination angle of the invert main body 34. 【0051】 In this embodiment, the invert information D1 may include information other than the inlet position D11, outlet position D12, size D13, D14, and gradient D15 described above, which is necessary when manufacturing the invert member 50. For example, the invert information D1 may include the inclination angle of the inclined portion 35, the surface shape of the inclined portion 35, the overall diameter of the existing invert member 30 (i.e., the diameter of the cylindrical inner surface of the straight pipe portion 20), and the height of the existing invert member 30. 【0052】 In the acquisition process S101 shown in Figure 4, invert information D1 is acquired using a camera 120 (see Figure 5) provided by the manufacturing system 100 and an acquisition unit 116 (see Figure 5) of the drawing creation device 110. The camera 120 enters the straight cylindrical section 20 and acquires the invert information D1 inside the manhole 10. In this embodiment, the camera 120 is an example of an internal information acquisition means for acquiring invert information D1. In the acquisition process S101 according to this embodiment, the camera 120 is entered into the straight cylindrical section 20 forming the manhole 10, and the camera 120 is used to acquire invert information D1 related to the existing invert member 30. Here, the camera 120 acquires the invert information D1 by photographing the existing invert member 30 inside the straight cylindrical section 20. For example, the camera 120 photographs the existing invert member 30 from above. The invert information D1 here may be based on still images or videos captured by the camera 120. In acquisition step S101, the camera 120 is inserted into the straight cylindrical section 20 from above and moved around the existing invert member 30. Then, the existing invert member 30 is photographed with the camera 120 oriented in a way that allows for the acquisition of invert information D1, and the invert information D1 is acquired from the captured still image or video. The still image or video captured by the camera 120 shows the invert 31 (particularly the invert inlet 32 ​​and the invert outlet 33) of the existing invert member 30, and it is desirable that the position and size of the invert inlet 32 ​​and the invert outlet 33 can be identified from the still image or video. 【0053】 Furthermore, the means by which the camera 120 enters and moves within the straight cylindrical section 20 are not particularly limited. Here, the photographer holds the camera 120 in their hand and manually enters and moves it. However, the camera 120 may be self-propelled and configured to automatically enter and move within the straight cylindrical section 20. In this case, for example, the camera 120 may be provided with a self-propelled drive mechanism. 【0054】 In this embodiment, in the acquisition step S101 shown in Figure 4, the acquisition unit 116 (see Figure 5) of the drawing creation device 110 acquires the invert information D1. For example, when the camera 120 takes a still image or video of the existing invert member 30, it transmits the still image or video to the drawing creation device 110. In the drawing creation device 110, the acquisition unit 116 receives the still image or video transmitted from the camera 120. The acquisition unit 116 acquires the invert information D1 from the still image or video of the existing invert member 30. The acquisition unit 116 may also acquire the invert information D1 by performing image analysis on the still image or video of the existing invert member 30 using image processing techniques. The still image or video as invert information D1 acquired by the acquisition unit 116 is stored in the storage unit 115 shown in Figure 5. 【0055】 Next, the three-dimensional model creation process S103 shown in Figure 4 is executed. In the three-dimensional model creation process S103, a three-dimensional model M1 of the invert member 50 is created based on the invert information D1. Here, the three-dimensional model M1 refers to three-dimensional model data created in a virtual space consisting of mutually orthogonal X, Y, and Z axes. 【0056】 Here, the three-dimensional model creation process S103 is implemented by the three-dimensional model creation unit 117 (see Figure 5) of the drawing creation device 110. Based on the invert information D1, the three-dimensional model creation unit 117 creates a three-dimensional model M1 of the invert member 50 that reproduces the existing invert member 30. Here, the positional relationship between the invert inlet 52 and the invert outlet 53 of the invert member 50 is determined by the inlet position D11 and the outlet position D12 of the invert information D1. The size of the invert inlet 32 ​​is determined by the size D13 of the invert inlet 32, and the size of the invert outlet 33 is determined by the size D14 of the invert outlet 33. The invert main body 54 of the invert member 50 is determined by the gradient D15. The position, orientation, shape, etc. of the invert main body 54 are determined by connecting the invert inlet 52 and the invert outlet 53. Here, the three-dimensional model creation unit 117 creates a three-dimensional model M1 of the invert member 50 by creating a three-dimensional model M1 of each part of the invert member 50 (here, the invert 51 (invert inlet 52, invert outlet 53, invert main body 54), and the inclined part 55) based on the invert information D1. Here, for example, the three-dimensional model creation unit 117 automatically creates a three-dimensional model M1 of the invert member 50 that reproduces the existing invert member 30 based on the invert information D1. 【0057】 However, in the three-dimensional model creation process S103, the creator operating the drawing creation device 110 may use the operating means 112 to operate the CAD software and create a three-dimensional model M1 of the invert member 50 based on the invert information D1. 【0058】 As mentioned above, as shown in Figure 2, the existing invert member 30 has a deteriorated portion 40. It is preferable that the deteriorated portion 40 is not reproduced in the three-dimensional model M1 of the invert member 50. Therefore, the three-dimensional model creation unit 117 creates a three-dimensional model that reproduces the existing invert member 30 in a state with the deteriorated portion 40 removed, as the three-dimensional model M1 of the invert member 50. The method for removing the deteriorated portion 40 is not particularly limited. For example, the three-dimensional model creation unit 117 creates the three-dimensional model M1 with the deteriorated portion 40 removed while estimating the state without the deteriorated portion 40 based on information about the surrounding portion of the deteriorated portion 40. For example, even if the creator manually creates the three-dimensional model M1 using CAD software, the creator should create the three-dimensional model M1 with the deteriorated portion 40 removed while estimating the state without the deteriorated portion 40 based on information about the surrounding portion of the deteriorated portion 40. The three-dimensional model M1 of the invert member 50, created in the three-dimensional model creation process S103, is stored in the storage unit 115 shown in Figure 5. 【0059】 Next, the drawing data creation process S105 shown in Figure 4 is executed. In the drawing data creation process S105, manufacturing drawing data DT1 for manufacturing the invert member 50 is created based on the invert information D1. In this embodiment, the manufacturing drawing data DT1 is created based on the three-dimensional model M1 of the invert member 50. In this embodiment, the drawing data creation process S105 is implemented by the drawing data creation unit 118 (see Figure 5) of the drawing creation device 110. The drawing data creation unit 118 creates the manufacturing drawing data DT1 from the three-dimensional model M1. 【0060】 The manufacturing drawing data DT1 referred to here is, for example, two-dimensional data. The manufacturing drawing data DT1 is two-dimensional drawing data of the three-dimensional model M1 viewed from the front, back, left, right, top, and bottom, and can be the so-called six-view drawing of the invert member 50. The six-view drawing referred to here is the front view, rear view, left view, right view, top view (e.g., plan view), and bottom view of the invert member 50 relative to the three-dimensional model M1. Note that if the invert member 50 can be manufactured based on the manufacturing drawing data DT1, some of the above six-view drawing may be omitted. The data format of the manufacturing drawing data DT1 is not particularly limited. The manufacturing drawing data DT1 is, for example, STL data. The manufacturing drawing data DT1 is in a format that can be read and analyzed by the 3D printer 130. In addition, the dimensions of each part of the invert member 50 may be shown in the manufacturing drawing data DT1. 【0061】 In this embodiment, the drawing data creation unit 118 in Figure 5 automatically creates manufacturing drawing data DT1 for the invert member 50, which reproduces the existing invert member 30, based on the invert information D1 and the three-dimensional model M1. Alternatively, in the drawing data creation process S105, the creator operating the drawing creation device 110 may manually create the manufacturing drawing data DT1 for the invert member 50 based on the invert information D1 and the three-dimensional model M1 by operating the CAD software using the operating means 112. 【0062】 In this embodiment, the manufacturing drawing data DT1 is data for the invert member 50 that reproduces the existing invert member 30 with the deteriorated portion 40 removed. Here, since the manufacturing drawing data DT1 is created based on the three-dimensional model M1 with the deteriorated portion 40 removed, the manufacturing drawing data DT1 is data with the deteriorated portion 40 removed. The manufacturing drawing data DT1 of the invert member 50 created in the drawing data creation process S105 is stored in the storage unit 115 in Figure 5. 【0063】 Next, the invert manufacturing process S107 shown in Figure 4 is executed. In the invert manufacturing process S107, an invert member 50 as shown in Figure 3 is manufactured based on the manufacturing drawing data DT1. The invert member 50 manufactured in the invert manufacturing process S107 is used to replace the existing invert member 30 when repairing the existing invert member 30. The invert member 50 manufactured in the invert manufacturing process S107 is a reproduction of the existing invert member 30 with the deteriorated portion 40 removed. 【0064】 In the invert manufacturing process S107, the method for manufacturing the invert member 50 is not particularly limited. For example, an operator may manually manufacture the invert member 50 while looking at the manufacturing drawing data DT1. In this case, for example, a mold for the invert member 50 based on the manufacturing drawing data DT1 is prepared. Then, resin is poured into the mold and allowed to harden. After that, the shape is refined by cutting or other means, thereby manufacturing the invert member 50 based on the manufacturing drawing data DT1. 【0065】 In this embodiment, in the invert manufacturing process S107, the invert member 50 may be automatically manufactured by the 3D printer 130 shown in Figure 5 based on the manufacturing drawing data DT1. The type of 3D printer 130 used to manufacture the invert member 50 is not particularly limited. The type of 3D printer 130 is one in which the invert member 50 is manufactured using a resin material. The type of 3D printer 130 may be, for example, a fused deposition modeling (FDM) method, a stereolithography (SLA) method, or an inkjet method. Examples of resin materials used in a fused deposition modeling (FDM) 3D printer 130 include PLA resin (polylactic acid), ABS resin, polypropylene (PP), polyethylene terephthalate (PETG), and polycarbonate (PC), and among these, it is preferable that the invert member 50 is formed using PLA resin or ABS resin, which are used as general-purpose resins. Examples of resin materials used in a stereolithography 3D printer 130 include photocurable resins such as epoxy resin and acrylic resin. Examples of resin materials used in an inkjet 3D printer 130 include photocurable resins such as epoxy resin and acrylic resin. In this embodiment, the type of 3D printer 130 used can be appropriately selected depending on the size of the invert member 50 and the resin material used to form the invert member 50. For example, a fused deposition modeling (FDM) 3D printer is preferred as the 3D printer 130 used to manufacture the invert member 50. 【0066】 Although not shown in the diagram, the 3D printer 130 includes a nozzle for extruding liquid resin material, a base for receiving the resin material extruded from the nozzle, and a position change mechanism for changing the relative three-dimensional position of the nozzle and the base. When manufacturing the invert member 50 with the 3D printer 130, the drawing creation device 110 transmits the manufacturing drawing data DT1 stored in the storage unit 115 to the 3D printer 130. The 3D printer 130 receives the manufacturing drawing data DT1. Based on the manufacturing drawing data DT1, the 3D printer 130 creates the invert member 50 on the base by extruding resin material from the nozzle as appropriate while changing the relative position of the nozzle and the base. 【0067】 Furthermore, in order to make the invert member 50 manufactured in the invert manufacturing process S107 less susceptible to erosion by drainage, etc., a step may be taken to coat the surface of the invert member 50 with a liquid resin material or the like. 【0068】 The invert member 50 manufactured in the invert manufacturing process S107 is a reproduction of the existing invert member 30 from which the deteriorated portion 40 has been removed, and as shown in Figure 3, it comprises an invert 51 and an inclined portion 55. The invert 51 has an invert inlet 52, an invert outlet 53, and an invert main body 54. The invert member 50 manufactured in the invert manufacturing process S107 is made of resin. 【0069】 Next, a method for repairing the existing invert member 30 (hereinafter also simply referred to as the repair method) will be described. In the repair method, the existing invert member 30 is repaired using the invert member 50 (see Figure 3) manufactured by the above manufacturing method. Figure 7 is a flowchart of the repair method for the existing invert member 30. As shown in Figure 7, the repair method for the existing invert member 30 includes a removal step S201 and an installation step S203. 【0070】 Figure 8 is a cross-sectional view showing the drainage pipe 5 and the straight pipe section 20 in a state where the existing invert member 30 has been removed from the straight pipe section 20. First, in the removal process S201 shown in Figure 7, the existing invert member 30 (see Figure 2) installed inside the manhole 10 is removed. Here, as shown in Figure 8, the existing invert member 30 is removed from the straight pipe section 20. The specific method for removing the existing invert member 30 from the manhole 10 is not particularly limited, and the existing invert member 30 can be removed by conventionally known methods. As mentioned above, the existing invert member 30 is made of concrete. Therefore, for example, a field worker enters the manhole 10 and uses a tool to chip away at the existing invert member 30. By doing so, the existing invert member 30 is chipped or broken, and thus removed from inside the straight pipe section 20. Furthermore, after the existing invert member 30 is removed, some of the existing invert member 30 may remain on the bottom 21 and side 22 of the straight cylinder section 20, potentially creating unevenness. Therefore, on-site workers may remove the unevenness by scraping the bottom 21 and side 22 with tools. Alternatively, on-site workers may fill the uneven areas with concrete or other materials. 【0071】 Next, the installation process S203 shown in Figure 7 is performed. Figure 9 is a cross-sectional view showing the drainage pipe 5, the straight pipe section 20, and the invert member 50 in the state in which the invert member 50 has been installed inside the straight pipe section 20. In the installation process S203, as shown in Figure 9, the invert member 50 manufactured in the invert manufacturing process S107 is installed inside the manhole 10. Here, the on-site worker enters the manhole 10 and places the invert member 50 on the bottom 21 of the straight pipe section 20. At this time, as shown in Figure 9, it is preferable to adjust the orientation of the invert member 50 relative to the straight pipe section 20 so that the invert inlet 52 of the invert member 50 is connected to the inlet 25 of the straight pipe section 20, and the invert outlet 53 of the invert member 50 is connected to the outlet 26 of the straight pipe section 20. After adjusting the orientation of the invert member 50 in this way, the invert member 50 is fixed to the straight pipe section 20. The method for fixing the invert member 50 is not particularly limited, but for example, the invert member 50 can be fixed to the straight cylindrical portion 20 using an adhesive. 【0072】 In this way, the existing invert member 30 can be repaired by replacing it with the invert member 50. As described above, the invert member 50 is a reproduction of the existing invert member 30 with the deteriorated part 40 removed. Therefore, by installing the invert member 50 inside the straight pipe section 20, the invert 51 of the invert member 50 connects the inlet 25 and the outlet 26. For example, wastewater discharged from the drainage facility flows through the upstream drainage pipeline 6 and into the straight pipe section 20 from the inlet 25. Inside the straight pipe section 20, the wastewater flows along the invert 51 towards the outlet 26. After that, the wastewater is discharged from the outlet 26 through the downstream drainage pipeline 7 to the main sewer pipe. 【0073】 In this embodiment, the method for manufacturing the invert member 50 is a manufacturing method for manufacturing an invert member 50 (see Figure 3) for repairing an existing invert member 30 installed in the manhole 10. As shown in Figure 4, the manufacturing method includes an acquisition step S101, a drawing data creation step S105, and an invert manufacturing step S107. In the acquisition step S101, a camera 120 (see Figure 5), which is an example of an internal information acquisition means, is inserted into the straight cylindrical section 20 that forms the manhole 10, and invert information D1 regarding the existing invert member 30 is acquired using the camera 120. In the drawing data creation step S105, manufacturing drawing data DT1 for manufacturing the invert member 50 is created based on the invert information D1. In the invert manufacturing step S107, the invert member 50 is manufactured based on the manufacturing drawing data DT1. In this embodiment, since the invert information D1 is information obtained by actually inserting the camera 120 into the straight cylindrical section 20, it is information that is relevant to the existing invert member 30. Therefore, by manufacturing the invert member 50 based on the invert information D1, it is possible to manufacture an invert member 50 that corresponds to the existing invert member 30. Consequently, when on-site workers repair the existing invert member 30, they only need to install, for example, a pre-manufactured invert member 50 into the straight cylinder section 20, thereby reducing the amount of work required when repairing the existing invert member 30. 【0074】 In this embodiment, as shown in Figure 4, the manufacturing method includes a three-dimensional model creation step S103. In the three-dimensional model creation step S103, a three-dimensional model M1 of the invert member 50 is created based on the invert information D1. In the drawing data creation step S105, manufacturing drawing data DT1 is created based on the three-dimensional model M1 of the invert member 50. Here, by looking at the three-dimensional model M1, it is easy to confirm whether the three-dimensional model M1 is a model that reproduces the existing invert member 30. Therefore, since the manufacturing drawing data DT1 is created from the three-dimensional model M1 which has been confirmed to reproduce the existing invert member 30, it is easy to manufacture an invert member 50 that reproduces the existing invert member 30. 【0075】 In this embodiment, as shown in Figure 2, the straight cylindrical section 20 forming the manhole 10 has an inlet 25 and an outlet 26. The existing invert member 30 has an invert inlet 32 ​​connected to the inlet 25, an invert outlet 33 connected to the outlet 26, and an invert main body 34 connecting the invert inlet 32 ​​and the invert outlet 33. As shown in Figure 6, the invert information D1 includes at least an inlet position D11, an outlet position D12, the size D13 of the invert inlet 32, the size D14 of the invert outlet 33, and a gradient D15. The inlet position D11 is the position of the invert inlet 32 ​​relative to the straight cylindrical section 20. The outlet position D12 is the position of the invert outlet 33 relative to the straight cylindrical section 20. The gradient D15 is the gradient from the invert inlet 32 ​​to the invert outlet 33. Here, since the invert information D1 includes at least the invert position D11, the outvert position D12, the size D13 of the invert invert section 32, the size D14 of the invert outvert section 33, and the gradient D15, an invert member 50 that reproduces the existing invert member 30 can be manufactured based on the invert information D1. 【0076】 In this embodiment, as shown in Figure 2, the existing invert member 30 has a deteriorated portion 40. In the drawing data creation process S105 in Figure 4, manufacturing drawing data DT1 is created for the existing invert member 30 with the deteriorated portion 40 removed. The deteriorated portion 40 is the part that causes the existing invert member 30 to need repair. Therefore, by manufacturing the invert member 50 without reproducing the deteriorated portion 40, it is possible to manufacture an invert member 50 that is reproduced to the state of the existing invert member 30 before deterioration. 【0077】 In this embodiment, the camera 120 in Figure 5 photographs the existing invert member 30. Here, invert information D1 of the existing invert member 30 can be obtained from still images or videos of the existing invert member 30 captured using the camera 120. 【0078】 In this embodiment, in the invert manufacturing process S107 shown in Figure 4, the invert member 50 is manufactured based on the manufacturing drawing data DT1 using the 3D printer 130 shown in Figure 5. In this way, the invert member 50 can be easily manufactured from the manufacturing drawing data DT1 by using the 3D printer 130. 【0079】 In this embodiment, the repair method for the existing invert member 30 is a repair method that uses an invert member 50 manufactured by the manufacturing method of the invert member 50 to repair the existing invert member 30. As shown in Figure 7, the repair method includes a removal step S201 and an installation step S203. In the removal step S201, the existing invert member 30 installed in the manhole 10 is removed. In the installation step S203, the invert member 50 manufactured in the invert manufacturing step S107 (see Figure 4) is installed in the manhole 10. In this way, the existing invert member 30 can be repaired by installing a pre-manufactured invert member 50 in the manhole 10 from which the existing invert member 30 has been removed. Since it is not necessary to manufacture the invert member 50 for repairing the existing invert member 30 on site, the number of man-hours required when repairing the existing invert member 30 can be reduced. 【0080】 In this embodiment, the straight cylindrical section 20 forming the manhole 10 and the existing invert member 30 are made of concrete. The invert member 50 manufactured in the invert manufacturing process S107 of Figure 4 is made of resin. Thus, even if the materials used to form the straight cylindrical section 20 and the existing invert member 30 are different from the materials used to form the invert member 50 manufactured to repair the existing invert member 30, the existing invert member 30 can be repaired by installing the invert member 50 inside the manhole 10. 【0081】 In the above embodiment, regarding the manufacturing method of the invert member 50, in the three-dimensional model creation step S103, a three-dimensional model M1 of the invert member 50 was created, and then in the drawing data creation step S105, manufacturing drawing data DT1 was created based on the three-dimensional model M1. However, the three-dimensional model creation step S103 may be omitted. That is, the drawing data creation step S105 may be performed after the acquisition step S101. After acquiring the invert information D1, the manufacturing drawing data DT1 may be created without creating the three-dimensional model M1 of the invert member 50. In this case, in the drawing data creation step S105, the manufacturing drawing data DT1 is created based on the invert information D1. 【0082】 In the above embodiment, the three-dimensional model M1 and the manufacturing drawing data DT1 were created using a single drawing device 110. However, the creation of the three-dimensional model M1 and the creation of the manufacturing drawing data DT1 may be performed using different drawing devices 110 (in other words, different personal computers). [Explanation of symbols] 【0083】 10 holes 20 Straight cylinder part 25 Inlet 26 Outlet 30 Existing invert member 31 Invert 32 Invert Inlet 33 Invert Outlet 34 Invert main body 40 Deteriorated part 50 Invert Member 120 Camera (means of acquiring internal information) 130 3D printers D1 Invert Information D11 Inflow position D12 Outflow position D13 Invert Inlet Size D14 Invert Outlet Size D15 Gradient DT1 Created drawing data M1 3D Model S101 acquisition process S103 Three-dimensional model creation process S105 Drawing data creation process S107 Invert manufacturing process S201 Removal process S203 Installation process

Claims

[Claim 1] A manufacturing method for producing an invert member for repairing an existing invert member installed in a manhole, An acquisition step involves inserting an internal information acquisition means into the straight cylindrical portion forming the manhole, and using the internal information acquisition means to acquire invert information relating to the existing invert member; A drawing data creation step, which creates manufacturing drawing data for manufacturing the invert member based on the invert information, An invert manufacturing process for manufacturing the invert member based on the aforementioned manufacturing drawing data, A method for manufacturing an invert member, including the method described above. [Claim 2] The process includes a three-dimensional model creation step that creates a three-dimensional model of the invert member based on the invert information, The method for manufacturing an invert member according to claim 1, wherein in the drawing data creation step, the manufacturing drawing data is created based on a three-dimensional model of the invert member. [Claim 3] The straight cylindrical portion forming the manhole has an inlet and an outlet. The aforementioned existing invert member is An invert inlet connected to the aforementioned inlet, An invert outlet connected to the aforementioned outlet, The invert main body connects the invert inlet and the invert outlet, It has, The aforementioned invert information includes: The inflow position of the invert inflow section relative to the straight cylinder section, The outlet position of the invert outlet section relative to the straight cylinder section, The size of the invert inlet and, The size of the invert outlet section and, The gradient from the invert inlet to the invert outlet, A method for manufacturing an invert member according to claim 1, comprising at least the following: [Claim 4] The aforementioned existing invert member has a deteriorated portion, The method for manufacturing an invert member according to claim 1, wherein the drawing data creation step involves creating the manufacturing drawing data for the existing invert member from which the deteriorated portion has been removed. [Claim 5] The method for manufacturing an invert member according to claim 1, wherein the internal information acquisition means is a camera for photographing the existing invert member. [Claim 6] The method for manufacturing an invert member according to claim 1, wherein the invert manufacturing process involves manufacturing the invert member using a 3D printer based on the manufacturing drawing data. [Claim 7] A repair method for repairing an existing invert member using an invert member manufactured by a method for manufacturing an invert member described in any one of claims 1 to 6, A removal step of removing the existing invert member installed in the manhole, Installation step: Installing the invert member manufactured in the invert manufacturing step into the manhole, A method for repairing existing invert members, including the above. [Claim 8] The straight cylindrical section forming the manhole and the existing invert member are made of concrete. The method for repairing an existing invert member according to claim 7, wherein the invert member manufactured in the invert manufacturing process is made of resin.

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