Existing drainage vertical pipe cleaning method and wire hoisting machine used therefor

Abstract

To provide a method for cleaning an existing drainage vertical pipe, which can easily clean an existing drainage vertical pipe while moving a high-pressure water jet nozzle with a wire, even for an existing drainage vertical pipe installed in a high-rise building that employs a drainage system using a horizontal collecting pipe that makes it difficult to access the inside of the existing drainage vertical pipe from the roof. [Solution] A method for cleaning an existing vertical drainage pipe, in which, on the lower floors, a pipe fragment is cut from the existing vertical drainage pipe to form a first opening in the existing vertical drainage pipe, and, on the higher floors, the tip of a wire is inserted through a second opening formed in the existing vertical drainage pipe to enter the existing vertical drainage pipe, the tip of the wire is lowered to the first opening, the tip of the wire is pulled out from the first opening, a high-pressure water jet nozzle is connected, high-pressure water is sprayed from the high-pressure water jet nozzle from the first opening towards the second opening while the wire is pulled up to clean, the high-pressure water jet nozzle and the tip of the wire are recovered, and another pipe fragment is connected to the part from which the pipe fragment was cut.

Description

[Technical Field]

[0001] The present invention relates to a method for cleaning an existing drainage vertical pipe installed in a high-rise building such as an apartment building. [Background technology]

[0002] In high-rise buildings such as apartment complexes, wastewater from facilities such as sinks, washrooms, bathrooms, and toilets is drained through horizontal pipes that run from the rooms where each facility is located to a shared vertical drainage pipe that runs through each floor, and then through the meeting hall to the sewer.

[0003] Wastewater contains residues, oils, and the like. As the wastewater passes through, solids (hereinafter simply referred to as solids) formed by the aggregation of residues, oils, and the like in the wastewater gradually adhere to the inner walls of the drainage vertical pipes, gradually reducing the diameter of the pipes. If the solids are left as they are, they may grow and clog the drainage vertical pipes. In order to prevent such clogging of the drainage vertical pipes, it is preferable that the drainage vertical pipes installed in high-rise buildings be cleaned at regular intervals.

[0004] A widely used method for cleaning vertical drainage pipes is to insert a high-pressure water jet nozzle attached to the end of a pressure-resistant hose into the vertical drainage pipe and spray high-pressure water from the nozzle onto solid matter stuck to the vertical drainage pipe, thereby breaking up the solid matter and cleaning it (hereinafter simply referred to as the high-pressure washing method).

[0005] A widely used high-pressure cleaning method involves inserting a high-pressure water nozzle into the opening of a vertical drainage pipe on the roof, gradually unwinding a pressure-resistant hose from a hose reel, and spraying high-pressure water from the high-pressure water nozzle toward the lower floors, breaking up the solid matter and moving it toward the lower floors, thereby cleaning from the higher floors toward the lower floors.

[0006] FIG. 10 is an explanatory diagram showing a cleaning method that starts from the higher floors and ends at the lower floors. When the high-pressure water nozzle 102 moves through the drainage vertical pipe H from the higher floors to the lower floors, the solid matter G destroyed on the higher floors falls downward along the drainage vertical pipe H together with the water W. When the high-pressure water nozzle 102 moves through the drainage vertical pipe H from the higher floors to the lower floors, the solid matter G is broken down from the higher floors. Therefore, when solid matter G grows on the lower floors, the solid matter G falling from above accumulates in that area, forming a blockage A. When a blockage A forms, water cannot drain from the drainage vertical pipe H to the lower floors. This causes water to backflow into the horizontal branch pipe R that leads to the drain outlet B in a room, such as a sink, toilet, or bathroom. This causes water to overflow from the drain outlet B, flooding the room with sewage and causing other damage. In addition, it was difficult to secure a work space and carry the high-pressure water jet nozzle connected to the pressure-resistant hose onto the roof.

[0007] Conversely, methods have also been proposed for cleaning vertical drainage pipes from the lower floors toward the higher floors. For example, Patent Document 1 below discloses the following method: A method for cleaning vertical drainage pipes in a multi-story building, in which a first end of a horizontal drainage pipe is connected to a sewerage facility and a second end of the horizontal drainage pipe is connected to the lower end. The method includes a connecting fitting hanging step in which a connecting fitting attached to the end of a wire hangs from the upper end to the lower end of the vertical drainage pipe; a nozzle feeding step in which a cleaning nozzle attached to the end of a cleaning hose is fed from the facility through the horizontal drainage pipe to the lower end; a connecting fitting drawing step in which cleaning water is discharged from the cleaning nozzle and the connecting fitting is drawn through the horizontal drainage pipe to the facility; a connecting step in which the cleaning nozzle is connected to the connecting fitting at a position outside the first end; and a cleaning step in which the wire is drawn up while cleaning water is discharged from the cleaning nozzle inside the vertical drainage pipe.

[0008] Furthermore, Patent Document 2 listed below discloses a drainage vertical pipe cleaning method for cleaning drainage vertical pipes in high-rise buildings, which includes the steps of forming an opening on the lower floor side of the drainage vertical pipe, and feeding the pressure-resistant hose with straight-line support material, which is formed by arranging a straight-line support material along a pressure-resistant hose equipped with a high-pressure water jet nozzle at its tip, from the opening on the lower floor side toward the higher floor side with at least a pair of feed rollers while spraying high-pressure water from the high-pressure water jet nozzle. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent Publication No. 2021-156014 [Patent Document 2] Patent No. 5748251 Summary of the Invention [Problem to be solved by the invention]

[0010] In recent years, in high-rise buildings such as large apartment complexes, drainage systems using horizontal collecting pipes have become commonplace. On the top floor, multiple vertical pipes are combined into a single horizontal collecting pipe, with a vent pipe at the end of the horizontal collecting pipe to ensure air flow. Even in the basement, multiple vertical pipes are combined into a single horizontal collecting pipe, improving air flow and facilitating drainage into the sewer system outside the building via a horizontal drain. This type of drainage system has the advantage of streamlining the drainage route, making inspection and maintenance easier.

[0011] FIG. 1 is an explanatory diagram illustrating the drainage system for a row of dwelling units in a 15-story apartment building 10. As an example, FIG. 1 shows the drainage system for a row of dwelling units in the 15-story apartment building 10, which is composed of multiple dwelling units arranged in the same position from the first floor to the fifteenth floor. In the apartment building 10 of FIG. 1, an equipment space ES is provided above the 15th floor, which is the top floor of the residences, for arranging water supply and drainage pipes, ventilation ducts, etc. Referring to FIG. 1, three existing pipes are shown passing through each floor of the apartment building 10. On each floor, 11 is an existing drainage vertical pipe connected to the kitchen sink S, 12 is an existing drainage vertical pipe connected to the washbasin L, and 13 is an air vent vertical pipe. The existing drainage vertical pipe 11, the existing drainage vertical pipe 12, and the air vent vertical pipe 13 are connected to a collecting horizontal pipe 14 in the equipment space ES, and are further connected to a collecting horizontal pipe 15 in the basement. One end of the collecting horizontal pipe 14 is connected to a ventilation pipe 16 that leads to the roof, and one end of the collecting horizontal pipe 15 is connected to a sewer (not shown) via a meeting place 19 outside the building.

[0012] Figure 2 is a diagram of the layout of three existing pipes when viewed from the rooftop side of the drainage system for the row of dwelling units in the 15-story apartment building 10 shown in Figure 1. As shown in Figure 2, the existing drainage vertical pipe 11, existing drainage vertical pipe 12, and ventilation vertical pipe 13 are respectively passed through horizontal pipes 11a, 12a, and 13a and are collected into a collecting horizontal pipe 14, which is connected to a ventilation pipe 16 that leads to the rooftop. Only the ventilation pipe 16 leads to the rooftop.

[0013] When cleaning a vertical drainage pipe that extends to the roof, it is possible to clean the inside of the vertical drainage pipe by hanging a wire directly from the roof into the pipe, connecting a high-pressure cleaning nozzle to the wire, and pulling it up, as disclosed in Patent Document 1. On the other hand, in a drainage system using a horizontal collecting pipe as described above, the ends of the vertical drainage pipes are not exposed on the roof but are hidden inside the building, making it difficult to access the desired vertical drainage pipe.

[0014] The method disclosed in Patent Document 2, in which a high-pressure cleaning nozzle is sent up from a lower floor to a higher floor, made it possible to work on drainage systems that use horizontal collecting pipes, but the device for sending up the high-pressure cleaning nozzle was heavy, making the cleaning work inconvenient.

[0015] The present invention aims to provide a method for cleaning existing drainage vertical pipes, which can easily clean existing drainage vertical pipes by moving a high-pressure water jet nozzle with a wire, even for existing drainage vertical pipes installed in high-rise buildings that employ a drainage system using a collecting horizontal pipe that makes it difficult to access the inside of the existing drainage vertical pipes from the roof. [Means for solving the problem]

[0016] One aspect of the present invention is a method for cleaning an existing drainage vertical pipe of a high-rise building, the method comprising the steps of: cutting a pipe segment from the existing drainage vertical pipe on the lower floor side of the high-rise building to form a first opening in the existing drainage vertical pipe; inserting a tip of a wire through a second opening formed on the side of the existing drainage vertical pipe on any higher floor of the high-rise building to enter the existing drainage vertical pipe and dangling the tip of the wire to the first opening; pulling out the tip of the wire from the first opening and connecting a high-pressure water jet nozzle connected to the tip of a pressure-resistant hose to the tip of the wire; cleaning the inside of the existing drainage vertical pipe by spraying high-pressure water from the high-pressure water jet nozzle from the first opening towards the second opening; after cleaning, retrieving the high-pressure water jet nozzle from the first opening and retrieving the tip of the wire from the second opening; and connecting another pipe segment to the section from which the pipe segment was cut. According to this method for cleaning existing drainage vertical pipes, even for existing drainage vertical pipes installed in high-rise buildings that use drainage systems that use horizontal collecting pipes that make it difficult to access the inside of the existing drainage vertical pipes from the roof, the existing drainage vertical pipes can be easily cleaned by moving the high-pressure water jet nozzle with a wire.

[0017] Furthermore, in the method for cleaning an existing vertical drainage pipe, a wire hoisting machine is used that is equipped with a long material, a guide for guiding the wire that is fixed to the long material, and a wire reel that is fixed to the long material, and the wire is wound up or fed out by the wire reel from the tip of the long material through the guide, and the tip of the wire is inserted into the existing vertical drainage pipe by inserting the tip of the long material into the second opening, and the tip of the wire is lowered to the first opening while feeding out the wire from the wire reel, and the wire is pulled up while high-pressure water is sprayed from the high-pressure water spray nozzle from the first opening toward the second opening, which is simple, easy to work with, and allows the high-pressure water spray nozzle to be moved within the pipe.

[0018] Furthermore, in the method for cleaning an existing drainage vertical pipe, it is preferable to connect a solid-liquid separator to the first opening, and separate the solids adhering to the inner wall of the existing drainage vertical pipe from the water that falls when high-pressure water is sprayed onto it, and then drain the water from the cut portion of the existing drainage vertical pipe on the sewer side. This configuration is preferable because it allows for continuous and efficient work by separating and collecting the solids that fall from the drainage vertical pipe and discharging the water into the sewer.

[0019] Furthermore, in the method for cleaning an existing drainage vertical pipe, it is preferable that the existing drainage vertical pipe is one of multiple existing drainage vertical pipes that are connected to a collecting horizontal pipe on the top floor that has a ventilation pipe for venting to the outside, as this makes the effects of the present invention more pronounced.

[0020] Another aspect of the present invention is a wire hoist used in the above-mentioned existing vertical drainage pipe cleaning method, comprising a long material, a guide for guiding a wire fixed to the long material, and a wire reel fixed to the long material, in which the wire is wound up or fed out by the wire reel from the tip of the long material through the guide, the tip of the wire is inserted into the existing vertical drainage pipe by inserting the tip of the long material into a second opening, the tip of the wire is drooped down to the first opening while feeding out from the wire reel, and the wire is pulled up while spraying high-pressure water from a high-pressure water spray nozzle from the first opening toward the second opening. [Effects of the Invention]

[0021] According to the present invention, even in the case of existing drainage vertical pipes installed in high-rise buildings that employ drainage systems using collecting horizontal pipes, even if it is difficult to directly access the inside of the existing drainage vertical pipes from the roof, the existing drainage vertical pipes can be easily cleaned by moving a high-pressure water jet nozzle with a wire. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is an explanatory diagram illustrating a drainage system for one row of dwelling units in a 15-story apartment building 10 according to an embodiment. [Figure 2] FIG. 2 is a diagram showing the layout of three existing pipes in the drainage system for the row of dwelling units of the 15-story apartment building 10 shown in FIG. 1, as viewed from the rooftop. [Figure 3] FIG. 3 is an explanatory diagram illustrating the process of cutting a pipe fragment 21 from an existing vertical drainage pipe 11 on the lower floor side of an apartment building 10 to form a first opening AP1 in the existing vertical drainage pipe 11 in the method for cleaning an existing vertical drainage pipe of this embodiment. [Figure 4] FIG. 4 is a schematic diagram showing the overall configuration of a drainage vertical pipe cleaning device 50 used to carry out the existing drainage vertical pipe cleaning method of this embodiment. [Figure 5]FIG. 5 is an explanatory diagram for explaining the state of work in the equipment space ES on the upper floor side of the apartment building (high-rise building) 10 shown in FIG. [Figure 6] Figure 6 is an explanatory diagram for explaining the process of pulling out the tip of the wire 3 from the first opening AP1 and connecting the high-pressure water jet nozzle 1 connected to the tip of the pressure-resistant hose in the method for cleaning an existing drainage vertical pipe of this embodiment. [Figure 7] FIG. 7 is an explanatory diagram for explaining the cleaning process in the drainage vertical pipe cleaning method of this embodiment. [Figure 8] FIG. 8 is an explanatory diagram for explaining the solid-liquid separator 20. As shown in FIG. [Figure 9] FIG. 9 is an explanatory diagram illustrating a step of connecting another pipe segment 31 to a portion of an existing vertical drainage pipe 11 from which a pipe segment 21 has been cut off, in the method for cleaning an existing vertical drainage pipe of this embodiment. [Figure 10] FIG. 10 is an explanatory diagram for explaining a conventional cleaning method in which cleaning is performed from the higher floors toward the lower floors. DETAILED DESCRIPTION OF THE INVENTION

[0023] The method for cleaning an existing drainage vertical pipe of the present invention is a method for cleaning an existing drainage vertical pipe of a high-rise building, and comprises the steps of: cutting a pipe segment from the existing drainage vertical pipe on the lower floor side of the high-rise building and forming a first opening in the existing drainage vertical pipe; inserting a tip of a wire through a second opening formed on the side of the existing drainage vertical pipe on any higher floor of the high-rise building to enter the existing drainage vertical pipe and dangling the tip of the wire to the first opening; pulling out the tip of the wire from the first opening and connecting a high-pressure water jet nozzle connected to the tip of a pressure-resistant hose to the tip of the wire; cleaning the inside of the existing drainage vertical pipe by spraying high-pressure water from the high-pressure water jet nozzle from the first opening towards the second opening; after cleaning, retrieving the high-pressure water jet nozzle from the first opening and retrieving the tip of the wire from the second opening; and connecting another pipe segment to the part from which the pipe segment was cut.

[0024] As a representative example, the steps for cleaning the existing drainage vertical pipes 11 using the existing drainage vertical pipe cleaning method of this embodiment for the drainage system of one row of dwelling units in a 15-story apartment building 10 shown in FIG. 1 will be described with reference to the drawings.

[0025] FIG. 3 is an explanatory diagram illustrating a process of cutting a pipe segment from an existing drainage vertical pipe on the lower floor side of a high-rise building and forming a first opening in the existing drainage vertical pipe in the method for cleaning an existing drainage vertical pipe according to this embodiment. FIG. 3(a) shows work in the underground pit UP, which is on the lower floor side of the apartment building (high-rise building) 10 shown in FIG. 1. Here, the underground pit refers to a space provided in the basement of a high-rise building and used to install infrastructure equipment such as water supply and drainage pipes, electrical wiring, gas pipes, and air conditioning ducts. A passageway is provided on the first floor of the high-rise building for people to enter the underground pit. A vent is also provided. Various materials and tools used in the work are brought into the underground pit UP through the passageway and vent.

[0026] As shown in Fig. 3(b), in the method for cleaning an existing drainage vertical pipe of this embodiment, first, in the underground pit UP on the lower floor side of a high-rise building, a pipe segment 21 is cut from the existing drainage vertical pipe 11 to form a first opening AP1 in the existing drainage vertical pipe 11. The existing drainage vertical pipe 11 is cut using, for example, a cutting disk equipped with a saw blade or a band saw.

[0027] The first opening is an opening formed in an existing vertical drainage pipe on the lower floor side of a high-rise building, and as described below, as long as it is an opening that can allow a high-pressure water jet nozzle to enter, it is not limited to an underground pit UP, and for example, an opening may be formed in an existing vertical drainage pipe that passes through a dwelling unit on the first floor, etc.

[0028] Next, the overall configuration of a drainage vertical pipe cleaning device 50 used to carry out the existing drainage vertical pipe cleaning method of this embodiment will be described with reference to Fig. 4. In Fig. 4, 1 is a high-pressure water jet nozzle, 2 is a pressure-resistant hose with a high-pressure water jet nozzle 1 attached to the tip, 3 is a wire for pulling up the high-pressure water jet nozzle 1, 4 is a high-pressure water washer that jets high-pressure water from the high-pressure water jet nozzle 1, 5 is a wire hoist, and 6 is a hose reel.

[0029] The wire hoisting machine 5 includes a long material 5a, a wire reel 5b fixed to the long material 5a for winding up or letting out the wire 3, a guide 5c and pulley 5d made of a pipe-shaped member or multiple ring-shaped members for passing and guiding the wire 3, a handle 5e for rotating the wire reel 5b, and a handle 5f. The wire reel 5b may be equipped with a brake mechanism. The wire 3 is let out by releasing the rotation of the wire reel 5b. The handle 5e is rotated by a person by turning it. Instead of the handle 5e, an electric motor may be used to provide rotational force.

[0030] As will be described later, the wire hoist 5 is inserted into a second opening formed on the side of an existing vertical drainage pipe on any high floor of a high-rise building, thereby causing the tip of the wire 3 to enter the pipe of the existing vertical drainage pipe, and the wire 3 is let out from the wire reel 5b while suspending the wire 3 to a first opening formed on a lower floor of the high-rise building. Use of such a wire hoist 5 for suspending the wire 3 is preferable because it is simple, easy to work with, and allows the high-pressure water jet nozzle to be moved within the pipe.

[0031] In the drainage vertical pipe cleaning device 50, a high-pressure water jet nozzle 1 is connected to the tip of a wire 3. There are no particular limitations on the method for connecting the tip of the wire 3 to the high-pressure water jet nozzle 1. Specifically, for example, a method can be used in which a loop is formed at the tip of the wire 3, a hook such as a carabiner is connected to the tip of the high-pressure water jet nozzle 1, and the hook is hooked onto the loop.

[0032] High-pressure water is supplied from a high-pressure water washer 4 through a pressure-resistant hose 2 to a high-pressure water spray nozzle 1, and while spraying water from the high-pressure water spray nozzle 1, a wire hoisting machine 5 is used to feed or wind up a wire 3, thereby allowing the high-pressure water spray nozzle 1 that sprays high-pressure water to be moved within an existing vertical drainage pipe 11.

[0033] The high-pressure water jet nozzle 1 preferably has a rotary nozzle head equipped with a small turbine or spinner, and is configured so that the nozzle head rotates automatically due to the high-pressure water. This type of rotation of the nozzle head causes the jetted water to move in a spiral pattern, allowing a powerful water flow to be directed over a wide area inside the existing vertical drainage pipe, more effectively crushing the solids G. Furthermore, this jetted water acts as a propulsive force in the direction of travel toward the higher floors, making it easier for the high-pressure water jet nozzle 1 to be sent from the lower floors to the higher floors within the existing vertical drainage pipe 11.

[0034] After these preparations, the existing drainage vertical pipe cleaning method of this embodiment is carried out. Figure 5 is an explanatory diagram for explaining the process of inserting the tip of a wire into the existing drainage vertical pipe from a second opening formed on the side of the pipe on any high floor of a high-rise building, and letting the tip of the wire hang down to the first opening in the existing drainage vertical pipe cleaning method of this embodiment. Figure 5 shows the state of work in the equipment space ES on the high floor side of the apartment building 10 (high-rise building) shown in Figure 1.

[0035] 5, in an equipment space ES of an apartment building 10, an existing drainage vertical pipe 11, an existing drainage vertical pipe 12, and a ventilation vertical pipe 13 are connected at their ends to a collecting horizontal pipe 14. An inspection hatch may be provided in such equipment space ES to check the status of the inside of the pipes and to perform maintenance and cleaning. In this embodiment, an inspection hatch provided in advance in the existing drainage vertical pipe 11 is used as a second opening formed in the side of the existing drainage vertical pipe on a high floor of a high-rise building. Specifically, the cover of the inspection hatch, which is the second opening AP2, is opened, and the tip of the wire 3 arranged on the tip side of the wire hoisting machine 5 is inserted into the inside of the existing drainage vertical pipe 11 through the second opening AP2.

[0036] However, if there is a large amount of solid matter attached to the inspection hatch, it may be difficult to insert the tip of the wire into the inspection hatch. Also, the location of the inspection hatch may be difficult to access. In such cases, an opening can be created in the side of the existing drainage vertical pipe using a hole saw or other tool, and the created opening can be used as a second opening. This opening is then sealed. While there are no particular limitations on the method for sealing the opening, one example is to use a Strab® coupling manufactured by Showabond Material Co., Ltd., a high-performance coupling system used for pipe connections and repairs that prevents pipe leaks.

[0037] The second opening is an opening formed on the side of the existing drainage vertical pipe on any high floor of a high-rise building, and the floor, shape, and location of the opening are not particularly limited as long as the opening allows the tip of the wire to hang down to the first opening. As described above, the opening can be formed at any position on the existing drainage vertical pipe.

[0038] 5, a weight 8 is attached to the tip of the wire 3 so that the tip of the wire 3 that has been inserted into the existing vertical drainage pipe 11 can be easily lowered to the first opening on the lower floor side. In this way, it is preferable to attach a weight made of lead or the like to make it easier to lower the tip of the wire 3 to the first opening on the lower floor side. If a brake mechanism is provided on the wire reel 5b of the wire hoisting machine 5, releasing the brake mechanism releases the wire reel 5b, and the gravity acting on the weight 8 causes the wire 3 to be sent out to the lower floors of the high-rise building.

[0039] 6 is an explanatory diagram illustrating the process of pulling out the tip of the wire from the first opening and connecting a high-pressure water jet nozzle connected to the tip of the pressure-resistant hose in the method for cleaning an existing drainage downpipe according to this embodiment. FIG. 6 again shows the work being done in the underground pit UP on the lower floors of the apartment building 10 shown in FIG. 1. As shown in FIG. 5, the gravity acting on the weight 8 sends the wire 3 down to the lower floors of the high-rise building, and as shown in FIG. 6(a), the tip of the wire 3 connected to the weight 8 appears hanging down from the first opening AP1. Then, as shown in FIG. 6(b), the weight 8 connected to the tip of the wire 3 is removed.

[0040] As will be described later, the existing vertical drainage pipe 11 is washed with high-pressure water by inserting a high-pressure water jet nozzle 1 through the first opening AP1 and lifting it up with a wire 3 toward the upper floors. In this type of washing operation, the spraying of high-pressure water causes solids G and water W adhering to the inner wall of the existing vertical drainage pipe 11 to fall. In order to efficiently collect and dispose of the falling solids G and water W, it is preferable to install a solid-liquid separator 20 below the first opening AP1, as shown in FIG. 6(c), which separates and collects the solids G falling from inside the existing vertical drainage pipe 11 and discharges the water W into the sewer.

[0041] In this embodiment, as shown in Fig. 6(c), in order to arrange such a solid-liquid separator 20, two elbows (bent joints) are combined with the first opening AP1 to form an offset structure OF that diverts the flow path of the wastewater. Then, as shown in Fig. 6(c), the tip of the wire 3 is pulled out from the first opening AP1, and the high-pressure water jet nozzle 1 connected to the tip of the pressure-resistant hose 2 is connected to the tip of the wire 3.

[0042] Then, as shown in Figure 7, high-pressure water is supplied to the high-pressure water jet nozzle 1 through a pressure-resistant hose 2 within the existing vertical drainage pipe 11 from the underground pit UP to the first, second, third, tenth, eleventh, fifteenth floors, and the equipment space ES, while the high-pressure water jet nozzle 1 is inserted through the first opening AP1 and pulled up by a wire 3 toward the second opening AP2 on the higher floors.

[0043] The high-pressure water jet nozzle 1 inserted through the first opening AP1 sprays high-pressure water to break up solid matter G adhering to the inside of the existing vertical drainage pipe 11. The broken up solid matter G then falls down the inside of the existing vertical drainage pipe 11 together with water W. In this way, the inside of the existing vertical drainage pipe 11 is cleaned from the lower floor side to the higher floor side.

[0044] 7, the solids G that have fallen inside the existing vertical drainage pipe 11 are discharged from the offset structure OF together with the water W. The fallen solids G and water W are then separated into the solids G and the water W by the solid-liquid separator 20.

[0045] As shown in FIG. 8, the solid-liquid separator 20 includes a supply hopper 20a that receives solids and water, a mesh 20b that captures solids G, and a drainage pump 20c. The solids G and water W discharged from the offset structure OF are received by the supply hopper 20a and passed through the mesh 20b. The solids G are separated by the mesh 20b. The separated water W is then discharged from a third opening AP3, formed by cutting a pipe segment 21 from the existing vertical drainage pipe 11, through a collecting horizontal pipe 15 and a collection point 19, and into the sewer system. The solids G separated by the solid-liquid separator 20 are collected and then disposed of as industrial waste.

[0046] During cleaning, solid matter G adhering to the inner wall surface of the existing vertical drainage pipe 11 is destroyed by high-pressure water W sprayed from the high-pressure water jet nozzle 1. By breaking down the solid matter G in the existing vertical drainage pipe 11 from the lower floors toward the higher floors in this way, the falling solid matter G is prevented from being blocked by the adhering solid matter G, and the problem of that section being blocked does not occur.

[0047] During cleaning, by observing the amount of solids G discharged from the offset structure OF, it is possible to confirm whether the cleaning of the existing drainage vertical pipe 11 has sufficiently broken down the solids G. While checking the amount of solids G thus generated, the cleaning is continued by winding up the wire 3 at an appropriate speed from the lower floors toward the higher floors. In this way, the area from the first opening AP1 on the lower floor to the second opening AP2 on the higher floors can be cleaned.

[0048] After cleaning is completed in this manner, the high-pressure water jet nozzle is withdrawn from the first opening, and the tip of the wire is withdrawn from the second opening. Specifically, after cleaning the area of ​​the existing drainage vertical pipe 11 from the first opening AP1 of the underground pit UP on the lower floor to the second opening AP2 on the higher floor, the tip of the wire 3 to which the high-pressure water jet nozzle 1 is connected is again lowered to the first opening AP1 on the lower floor, and the high-pressure water jet nozzle 1 connected to the tip of the wire 3 is released and withdrawn from the first opening AP1. Furthermore, from the equipment space ES side on the higher floor, the wire hoist 5 is used to wind up only the released wire 3, and the tip of the wire 3 is withdrawn from the second opening AP2.

[0049] Then, on the lower floors, another pipe segment is connected to the section of the existing drainage vertical pipe 11 from which the pipe segment was first removed. Specifically, referring to FIG. 9 , another pipe segment 31 is fitted and secured to the section of the existing drainage vertical pipe 11 from the first opening AP1 to the third opening AP3 of the underground pit UP on the lower floors. In FIG. 9 , this is secured using band-shaped coupling members 32 and 33. In this manner, the pipe structure is restored. Examples of band-shaped coupling members 32 and 33 include the Strab® Coupling, a high-performance coupling system used for pipe connection and repair, which has a leak-proof function. Furthermore, the method of fitting and securing the other pipe segment is not limited to band-shaped coupling members; known connecting sockets for connecting pipes may also be used.

[0050] The above has described in detail the embodiments of the drainage vertical pipe cleaning method according to the present invention, but the drainage vertical pipe cleaning method according to the present invention is not limited to the above-described embodiments, and may be modified as appropriate within the scope of the gist of the present invention. [Explanation of symbols]

[0051] 1 High-pressure water jet nozzle 2 Pressure-resistant hoses 3 wire 4. High-pressure water washer 5 Wire hoisting machine 5a Long material 5b Wire reel 5c Guide member 5d pulley 5e Handle 8 weight 10. Apartment buildings (high-rise buildings) 11,12 Existing drainage vertical pipe 11a,12a Horizontal draw pipe 13 Ventilation vertical pipe 13a Horizontal draw pipe 14,15 Collecting horizontal pipe 16 Ventilation pipe 19 Kaisho 20 Solid-liquid separator 21,31 tube fragment A Occlusion AP1 First opening AP2 Second opening AP3 Third Opening AP32 Third Opening B Drain port ES Equipment Space G Solids L wash basin OF offset structure S Sync UP Underground Pit W water

Claims

1. A method for cleaning an existing drainage vertical pipe of a high-rise building, comprising: cutting a pipe segment from an existing drainage vertical pipe on a lower floor side of a high-rise building to form a first opening in the existing drainage vertical pipe; On any high-rise floor of the high-rise building, inserting a tip of a wire into the existing vertical drainage pipe through a second opening formed on a side surface of the existing vertical drainage pipe, and then lowering the tip of the wire to the first opening; A step of pulling out a tip of the wire from the first opening and connecting a high-pressure water jet nozzle connected to a tip of a pressure-resistant hose to the tip of the wire; a step of cleaning the inside of the existing drainage vertical pipe by spraying high-pressure water from the high-pressure water jet nozzle from the first opening toward the second opening while lifting the wire; After the cleaning, recovering the high-pressure water jet nozzle from the first opening and recovering the tip of the wire from the second opening; and connecting another pipe segment to the portion from which the pipe segment was cut.

2. A wire winding machine is used, which includes a long material, a guide for guiding a wire fixed to the long material, and a wire reel fixed to the long material, The wire is wound up or fed by the wire reel from the tip of the elongated material through the guide, 2. The method for cleaning an existing vertical drainage pipe according to claim 1, wherein the tip of the long material is inserted into the second opening to cause the tip of the wire to enter the pipe of the existing vertical drainage pipe, the tip of the wire is lowered to the first opening while the wire is being fed from the wire reel, and the wire is pulled up while high-pressure water is sprayed from the high-pressure water spray nozzle from the first opening toward the second opening.

3. 2. The method for cleaning an existing drainage vertical pipe according to claim 1, further comprising the steps of: connecting a solid-liquid separator to the first opening; separating water and solids adhering to the inner wall of the existing drainage vertical pipe, which fall when the high-pressure water is sprayed thereon, by the solid-liquid separator; and discharging the water from the cut portion of the existing drainage vertical pipe on the sewer side.

4. 2. The method for cleaning an existing drainage vertical pipe according to claim 1, wherein the existing drainage vertical pipe is one of a plurality of existing drainage vertical pipes that are connected to a collecting horizontal pipe on the top floor and that has a ventilation pipe for venting to the outside.

5. The cleaning method for an existing drainage vertical pipe according to claim 1 is used, A wire winding machine comprising: a long material; a guide fixed to the long material for guiding a wire; and a wire reel fixed to the long material; The wire is wound up or fed by the wire reel from the tip of the elongated material through the guide, The wire hoisting machine is characterized in that the tip of the long material is inserted into the second opening to cause the tip of the wire to enter the existing vertical drainage pipe, the tip of the wire is lowered to the first opening while the wire is being let out from the wire reel, and the wire is pulled up while high-pressure water is sprayed from the high-pressure water spray nozzle from the first opening toward the second opening.

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