JP2009179980A - Feed water stand pipe maintenance method for multistoried building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a feed water stand pipe maintenance method for a multistoried building, according to which a feed water stand pipe can be renewed or renovated without using a temporary stand pipe. <P>SOLUTION: According to the method, a pipe portion of a first dwelling unit D<SB>L</SB>and a pipe portion of a second dwelling unit D<SB>R</SB>are connected together by a bypass pipe 1, and by setting a valve V2<SB>L</SB>of the first dwelling unit in a "closed" state, feed water to both the dwelling units D<SB>L</SB>, D<SB>R</SB>is carried out from a second stand pipe A<SB>R</SB>. The above procedure is carried out on each story to ensure feed water to each dwelling unit. Then a valve (first main valve) V1<SB>L</SB>of a first stand pipe A<SB>L</SB>is closed to stop feed water, and in this state the stand pipe A<SB>L</SB>is renewed or renovated. During execution of the maintenance work, feed water to each dwelling unit is carried out by using the existing second stand pipe A<SB>R</SB>, and setting of the temporary stand pipe is not necessary, which contributes to reduction of construction materials and man-power, to thereby reduce construction costs accordingly. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

    The present invention relates to a water supply vertical pipe maintenance method in a multi-layer building, in which the water supply vertical pipe is maintained in a multi-layer building in which a plurality of water supply vertical pipes penetrating each floor are arranged in parallel.

Typical water supply methods for multi-story buildings (multi-storey apartments and other multi-storey buildings) include the elevated water tank system shown in FIG. 12 and the pumping system shown in FIG. Is mentioned. Reference numeral 100 in FIG. 12 indicates a water receiving tank for temporarily storing water from a water main (not shown), reference numeral 101 indicates a pump for pumping up water in the water receiving tank 100, and reference numeral 102. Indicates a pumping pipe, reference numeral 103 indicates an elevated water tank installed on the roof so as to collect the water pumped up by the pump 101, and reference numeral 104 indicates a horizontal pipe (hereinafter referred to as "rooftop" arranged on the roof). water supply pipe "to) indicates, reference numeral _a 1, _{a 2,} ... denotes a vertical pipe being arranged so as to extend through the floor, reference numeral _V1 1, V1 _2, ..., each vertical pipe _a 1, a _2, showing the valve installed to .... Moreover, the code | symbol 200 in FIG. 13 shows a water receiving tank, and the code | symbol 201 shows a water supply pump.

    By the way, in such a multi-story building, there are cases where maintenance work is performed in order to rehabilitate or renew a vertical pipe, and several methods have been proposed as a method for that purpose (for example, patents). Reference 1 and 2).

FIG. 15 is a perspective view showing an example of a conventional method for renewing a vertical pipe, where symbol Ai represents an existing water supply vertical tube, symbol Ci represents an existing horizontal pipe, and symbol Ai ′ represents a newly installed vertical tube. A vertical pipe for water supply is shown, Ci ′ indicates a temporary horizontal pipe, and Ci ″ indicates a new horizontal pipe. When the vertical pipe is updated,
-Install a new water supply vertical pipe Ai 'in the vicinity of the existing water supply vertical pipe Ai (for example, an extra space in the meter box),
・ Pipe the temporary horizontal pipe Ci 'as shown in the figure to ensure water supply to the dwelling unit.
・ After that, it was proposed that water would be supplied to the dwelling unit from the newly installed vertical pipe Ai 'through the newly installed horizontal draw pipe Ci "and the temporary draw pipe Ci' etc. would be removed.

In addition, in the case of rehabilitation work in a multi-story building where gas pipes, electric wires, etc. are arranged and there is no extra space around the existing vertical pipe (for example, inside the meter box), water is supplied only during the construction period. The vertical pipe (hereinafter referred to as “temporary vertical pipe”) has been arranged outside the veranda (see the broken line 300 in FIG. 16). Specifically, the following work was performed.
(1) A temporary vertical pipe 300 and a temporary rooftop water supply pipe 301 are installed in the entire multi-story building.
(2) When the installation of all the temporary vertical pipes 300 and the temporary rooftop water supply pipe 301 is completed, the water supply to the existing vertical pipes A ₁ ,... Is stopped and water is supplied from the elevated water tank 103 to the temporary vertical pipe 300. Work as if For example, the existing rooftop water supply pipe 104 is cut at a portion indicated by reference numeral 302 (location close to the elevated water tank 103) and a branch plug (not shown) is attached, and the temporary rooftop water supply pipe 301 is connected to the branch plug.
(3) Remove the pipes (horizontal pipes) of each dwelling unit from the existing vertical pipes A ₁ , A ₂ ,... And reconnect them to the temporary vertical pipe 300.
(4) Above (3) for all units
When the above work is completed, the valve (not shown) of the branch plug is opened, and water is supplied to each dwelling unit through a temporary vertical pipe.
(5) In this state, since no water remains in the existing vertical pipes A ₁ , A ₂ ,..., Maintenance work is possible.
(6) When the maintenance work is completed, connect the pipes (horizontal pipes) of each dwelling unit to the vertical pipes (vertical pipes that have been renewed or renovated), and operate the branch plug valve from the elevated water tank 103. Resume water supply to the vertical pipe (the vertical pipe that has been renewed or rehabilitated).
(7) Thereafter, the temporary vertical pipe 300 and the temporary rooftop water supply pipe 301 that are no longer needed are collected.
Japanese Patent No. 3807789 Japanese Patent No. 3961643

    However, in the case of the construction method shown in FIG. 16, pipes for temporary vertical pipes and other materials are required, and labor for installing the temporary vertical pipes in a multi-layered building is also required, which increases the construction cost. There was a problem that. Further, in the case of the construction method shown in FIG. 16, a large-scale construction (construction for several hours) such as cutting an existing piping portion and attaching a branch plug is necessary, and the temporary vertical pipe 300 is filled with water. However, it takes time (it depends on the size of the multi-story building, but it takes about 1 hour). In each dwelling unit, it is necessary to construct a pipe (horizontal drawing pipe) to the temporary vertical pipe 300. As a result, there was a problem that the water shut-off time was long (about 3 to 5 hours).

    An object of the present invention is to provide a vertical pipe maintenance method for water supply in a multi-story building that solves the above-mentioned problems.

The invention according to claim 1, a plurality of water supply vertical pipe so as to pass through the floor (code A _1, A 2 in FIG. 12 and FIG. 13, _... see) is a plurality of layers building comprising juxtaposed (FIG. 12 In the vertical pipe maintenance method for water supply in a multi-layered building, which maintains at least one vertical pipe for water supply at the reference B ₁ and B _{2 in} FIG.
The first vertical pipe is a predetermined water supply vertical pipe for a different water supply piping portion of the first dwelling unit undergoing water (see reference numeral A _L in FIG. ₂₎ (D L), with the first vertical pipe A step of connecting the pipe portion of the second dwelling unit (D _R ) receiving water from the second vertical pipe (A _R ), which is a vertical pipe, with the bypass pipe (1) (see S1 in FIG. 2 and FIG. 9). )When,
Step of supplying water of the second vertical pipe (A _R ) not only to the second dwelling unit (D _R ) but also to the first dwelling unit (D _L ) via the bypass pipe (1) (FIG. 3). , And S2 in FIG. 9),
A step of stopping the supply of water to the first vertical pipe ( _AL ) (see S3 in FIG. 3 and FIG. 9);
And a step of maintaining the first vertical pipe ( _AL ) in which the supply of water is stopped (see S4 in FIGS. 4, 5, and 9).

The invention according to claim 2 is the invention according to claim 1, wherein after the maintenance of the first vertical pipe ( _AL ) is completed, the supply of water to the first vertical pipe ( _AL ) is resumed. , first vertical tube water _{(a L),} said first dwelling _{(D L)} as well as the bypass pipe (1) providing also to the second dwelling unit _{(D R)} through (FIG. 6 and S5 in FIG. 9),
A step of stopping the supply of water to the second vertical pipe (A _R ) (see S6 in FIG. 6 and FIG. 9);
And a step of maintaining the second vertical pipe (A _R ) in which the supply of water is stopped (see S7 in FIGS. 6, 7, and 9).

    The invention according to claim 3 is the invention according to claim 1 or 2, characterized in that the maintenance is to update the vertical pipe or to regenerate the vertical pipe.

    Note that the numbers in parentheses are for the sake of convenience indicating the corresponding elements in the drawings, and therefore the present description is not limited to the descriptions on the drawings.

    According to the first and third aspects of the invention, water is supplied to the first dwelling unit during maintenance work from the existing second vertical pipe, so that a temporary vertical pipe is installed as in the conventional construction method. Therefore, it is possible to reduce the materials and labor (reduction), and the construction cost can be reduced accordingly. Moreover, according to this invention, it is sufficient to cut off water only during the operation | work which connects a bypass pipe in each dwelling, and the operation | work which removes a bypass pipe, and the water cut-off time can be shortened.

    According to the invention which concerns on Claim 2, the maintenance work of a 2nd vertical pipe is attained only by simple operation of switching a water supply path | route.

    Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS. Here, FIG. 1 is a schematic diagram (piping diagram) showing an example of a piping state before the start of maintenance work, and FIG. 2 is a schematic diagram showing a state in which the piping parts of each dwelling unit are connected by a bypass pipe. FIG. 3 is a schematic diagram (piping diagram) showing a state in which each valve is switched and water is supplied to each dwelling unit from the second vertical pipe. FIG. FIG. 5 is a schematic diagram (piping diagram) showing a state where a pipe is removed, FIG. 5 is a schematic diagram (piping diagram) showing a state where a first vertical pipe is newly installed, and FIG. 6 shows each dwelling unit by switching each valve. It is a schematic diagram (piping diagram) which shows a mode that it supplies water to a 1st vertical pipe and removes a 2nd vertical pipe, FIG. 7 is a schematic diagram (piping diagram) which shows a mode that the 2nd vertical pipe was newly installed. FIG. 8 shows that the bypass pipe is removed and each valve is switched to transfer the first vertical pipe and the second vertical pipe to each dwelling unit. FIG. 9 is a flow chart showing an example of the procedure of a water supply vertical pipe maintenance method according to the present invention, and FIG. FIG. 11A is a cross-sectional view illustrating an example of a piping state before maintenance work, and FIG. 11B is a cross-sectional view illustrating an example of a piping state after maintenance work. FIG. 12 is a schematic diagram showing an example of the structure of a multi-layer building adopting an elevated tank system as a water supply method, and FIG. 13 is a diagram of a multi-layer building adopting a pumping method as a water supply method. It is a schematic diagram which shows an example of a structure, and FIG. 14 is a schematic diagram (pipe figure) which shows the state which connected the piping part of three dwelling units with two bypass pipes.

The water supply vertical pipe maintenance method according to the present invention is a multi-layered structure in which a plurality of water supply vertical pipes (see reference numerals A ₁ , A ₂ ,... In FIGS. 12 and 13) are arranged in parallel so as to penetrate each floor. This is a method of maintaining at least one water supply vertical pipe in the objects (multi-storey buildings) B ₁ and B ₂ .

    The vertical water pipe maintenance method for water supply according to the present invention can be carried out regardless of the type of water supply system, whether it is the elevated water tank system shown in FIG. 12 or the pump pumping system shown in FIG. Even other systems can be implemented. In addition, since the present invention is a method for maintaining “at least one” water supply vertical pipe as described above, not only the case of performing maintenance of all the water supply vertical pipes of the multi-layer building but also a part thereof. When (one or more) water supply vertical pipes are maintained (when the remaining water supply vertical pipes are not maintained, or when the remaining water supply vertical pipes are maintained by a method other than the present invention) Both) are also included in the scope of the present invention.

The water supply vertical pipe maintenance method according to the present invention comprises at least the following steps (1) to (4). That is,
(1) a predetermined water supply vertical pipe (hereinafter. Reference numerals A _L in FIG. 2 as "first vertical pipe") and the pipe portion of the first dwelling D _L undergoing water from the first vertical pipe another water supply vertical pipe and the a _L (hereinafter, "second vertical pipe" and) a step of connecting the pipe portion of the second dwelling unit D _R undergoing water from a _R in the bypass pipe 1 (FIG. 2 and S1 in FIG. 9)

In order to connect the above-described bypass pipe 1 to the pipe portion of each dwelling unit, the pipe portion of each dwelling unit needs to have a connection port for the bypass pipe 1 (hereinafter referred to as “bypass port”). . As shown in FIG. 1, in the case of a dwelling unit which does not have such a bypass port, a portion of the pipe portions (e.g., first lateral引管C _L and the second transverse引管C _R), a bypass It is necessary to replace it with a piping unit having a port (hereinafter referred to as a “branching unit” _; refer to reference characters U _L and U _{R in} FIG. 2). These branch unit _U L, _{U R} is, there is a structure shown in detail in FIG. 10,
An inlet U ₁ connected to the side of the longitudinal pipes A _L , AR _;
- and the outlet U ₂ which is connected to the pipe portion side of the dwelling unit,
An inlet U ₃ to which a newly installed vertical pipe is connected;
A bypass port U ₄ to which the bypass pipe 1 is connected;
have. Note that the inlet U ₃ have the valve V3 is mounted, and is configured to be opened and closed. Further, the inlet U ₁ and the bypass port U ₄ is adapted to be closed by attaching a closure cap (not shown) (details will be described later). Further, a pressure reducing valve is attached as indicated by a symbol R. Incidentally, the branch unit U _L, U _R is the two ports (inlet U ₃ and the bypass port U ₄₎ freshly those applied to the pipe portion of each dwelling unit, inlets U ₁ a vertical pipe of new an inlet U ₃ by connecting may be abolished. Such branching unit U _L, the connecting bypass tube 1 is attached to U _R in each dwelling unit, the valve V2 L for each dwelling _unit, because it must close the V2 _R, during which each dwelling unit is temporarily It becomes a water outage state. The bypass pipe 1 is preferably constituted by a cross-linked polyethylene pipe (for example, Elmex (registered trademark)), a stainless steel flexible pipe, a pressure-resistant hose, or the like. Further, reference numeral M _L, M _R, such as FIG. 1 shows the meter provided in each dwelling unit.

(2) water of the second vertical pipe A _R, the second dwelling D _R as well, the step of supplying even via the bypass pipe 1 into the first dwelling D _L (FIG. 3, and FIG. 9 (See S2)

The valve V2 _L for the first dwelling and "closed" by a valve V2 _R for the second dwelling unit "open", the water from the second vertical pipe A _R is the path of the arrow shown in FIG. 3 dwelling D _L, supplied to the D _R, suspension of water supply condition and thus be eliminated. Such work, each floor dwelling which is supplied with water from the first vertical pipe A _L (i.e., the first dwelling D _L of each _floor) and is supplied with water from the second vertical pipe A _R It is good to carry out for the dwelling units on each floor (that is, the second dwelling unit D _{R on} each floor).

(3) a step of stopping the supply of water of the the first vertical pipe A _L (see S3 of FIG. 3, and FIG. 9)
Close the valve (first main valve V1 _L) attached to the first vertical pipe A _L, it is preferable to stop the supply of water. This step needs to be performed before the next step (4), but does not have to be performed after the step (2), and before the step (2), It may be carried out before the step of).

(4) a step of supplying water to maintain the first longitudinal tube A _L being stopped (see S4 in FIG. 4, 5, and 9)
Maintenance in this specification is
・ Replace existing water supply vertical pipes with new vertical pipes (for example, stainless steel vertical pipes) ・ Renovate existing water supply vertical pipes (for example, remove rust on the inner surface of the vertical pipes and apply epoxy coating) To do)
It is a concept that includes both. Note that removed the FIG. 4 the first vertical pipe A _L, connected to the first vertical pipe A _LN to the inlet of the first dwelling branch unit U _L of newly FIG 5 (reference numeral U ₃ in FIG. 10) is doing. The first vertical pipe A _L of removal was followed inlet of the existing (reference numeral U ₁ in FIG. 10) is closed by attaching a blocking lid (not shown). These operations, that is, connection of the first dwelling branch unit U _L of the first vertical pipe A _LN of new needs to be performed for all floors.

According to the present invention, since the water supply of the to the first dwelling D _L in the maintenance work is configured to perform the second vertical pipe A _R of the existing, installed temporary vertical pipe like a method shown in FIG. 16 Therefore, it is possible to reduce the materials and labor (reduction), and the construction cost can be reduced accordingly. Moreover, according to this invention, it is sufficient to cut off water only during the operation | work which connects the bypass pipe 1 in each dwelling, and the operation | work which removes the bypass pipe 1, and the water cut-off time can be shortened to about 10 minutes. Furthermore, since the bypass pipe 1 is unnecessary and can be removed when the maintenance of the water supply vertical pipe is completed, the bypass pipe 1 can be reused for other maintenance work, and the construction cost can be reduced.

Incidentally, when the maintenance of the first vertical pipe A _L has been completed as described above, it may be carried out in the following (5) to (7) steps. That is,
(5) after the maintenance of the first vertical pipe A _L has been completed, and resume the supply of water to the first vertical pipe A _L, the water of the first vertical pipe A _L, the first dwelling D _L as well, supplying also to the second dwelling D _R through the bypass tube 1 (see S5 in FIG. 6, and 9)
Those of the configuration shown in FIG. 6, in the "open" the first main valve V1 _L water supply resumed to the first vertical pipe A _L, the valve V3 of the branch unit U _L for the first dwelling ""to the valve V2 _R for the second dwelling unit" open when in the closed ", as the arrow so that the water is supplied.

(6) a step of stopping the supply of water of the the second vertical pipe A _R (see S6 in FIG. 6, and 9)
This step is the above (4)
It is sufficient if it is performed after the step (2) and before the next step (7), and it is not necessarily performed between (5) and (7).

(7) a step of supplying water to maintain the second vertical pipe A _R being stopped (see S7 in FIG. 6, 7, and 9)
It may perform maintenance of the second vertical pipe A _R (update or rehabilitation). Note that removed the 6 second vertical pipe A _R, connected to the second vertical pipe of newly FIG 7 A _RN the second dwelling unit for branching unit U _R inlets (reference numeral U ₃ in FIG. 10) is doing. A second vertical tube A _R The removal was followed inlet of the existing (reference numeral U ₁ in FIG. 10) is closed by attaching a blocking lid (not shown). These operations, that is, connection to the second dwelling unit for branching unit U _R of the second vertical pipe A _RN in new must be performed for all floors.

Note that, as described above, the maintenance of the first vertical pipe A _L and the second vertical pipe A _R is completed, remove the bypass tube 1. In the state during the removal, stopping the supply of water and the valve V3 of the branch unit U _L for the first dwelling unit to the bypass tube 1 in the "closed" both valve V3 of the branching unit U _R for the second dwelling unit There is a need to do. The bypass port U ₄ after removing the bypass tube 1 is closed by attaching a blocking lid (not shown). Thereafter, as shown in FIG. 8, the valve V3 of the branch unit U _L for the first dwelling unit both valve V3 of the branching unit U _R for the second dwelling unit to "open", the dwelling D _L, D _R Resume water supply to By repeating the steps (1) to (7) described above, it is possible to maintain all the water supply vertical pipes of the multi-layer building.

Incidentally, the process of the above (5) to (7) updates the first vertical pipe A _L implemented without performing up (1) to (4) to the new vertical pipe of large diameter, a the existing 2 vertical pipe a _R is as it left without nor rehabilitation updated (or removed), may be performed feedwater two dwelling units worth in new vertical pipe of large diameter (or 3 dwelling unit or min). For example, FIG.
As shown, in the case where the first dwelling D _L is subjected to water from the first vertical pipe A _L, the second dwelling D _R receiving water from the second vertical pipe A _R, FIG. (B)
In as indicated at _{A LN,} updates the first vertical pipe _{A L} in new vertical pipe _{A LN} of large diameter, the first dwelling from new vertical pipe _{A LN} of the thick diameter _{D L} and the second dwelling unit _{D R} You may make it supply water to both. Thereby, the number of the vertical pipes for water supply can be reduced. Incidentally, FIG. 11 (a) (b), the door E _L of each dwelling _unit, has the meter box so as to be adjacent to each other in front of E _R (outside the door), each meter box, the vertical pipe A _L shows the state in _{which a R} and transverse引管_C L, is _{C R} are housed. This FIG. 11 (a)
(b), the although the first dwelling D _L and the second dwelling D _R indicates the case where the adjacent, of course not limited to this, the construction in the same manner even dwelling nonadjacent be able to. Alternatively, only one water supply vertical pipe may be provided, and water may be supplied from the single water supply vertical pipe to all the dwelling units (to every dwelling unit for each floor).

By the way, in the example shown in FIGS. 1-8, although one dwelling unit (1st dwelling unit D _L ) and one dwelling unit (2nd dwelling unit D _R ) are connected with one bypass pipe 1, of course. It is not restricted to this, The following aspects are also contained in the scope of the present invention. That is,
- As illustrated in FIG. 14, (although in the figure is two units, 3 units or more in which may be) a plurality of first dwelling _{D L1, D L2} plurality and a single second dwelling unit _{D R} (2 bypass pipe 1A of this or more), the reference water was carried out (arrow from the side of the second dwelling unit _{D R} to the first dwelling _{D L1, D L2} of the plurality linked at 1B), a plurality of first dwelling D A mode in which maintenance of the vertical pipes of _L1 and D _L2 (that is, a plurality of first vertical pipes A _L1 and A _L2 ) is performed simultaneously. A mode in which water is supplied to the first dwelling unit from the side of the plurality of second dwelling units, and the vertical pipe (that is, the first vertical pipe) of the first dwelling unit is maintained. Connect the dwelling units with multiple bypass pipes and supply water to the first dwelling units from the second dwelling unit side ( The number of the first vertical pipes and the number of the second vertical pipes may be the same or different), and a mode in which maintenance of the vertical pipes of the plurality of first dwelling units (that is, the plurality of first vertical pipes) is performed simultaneously. . For example, when the number of water supply vertical pipes is six as shown by reference signs A ₁ ,... In FIG. 12, dwelling units that receive water supply from four water supply vertical pipes (first vertical pipes) (4 per floor) The piping part of the two first dwelling units) is connected to the piping part of the dwelling unit (two second dwelling units per floor) receiving water from the remaining two water supply vertical pipes (second vertical pipes). It is possible to perform maintenance of the four first vertical pipes by connecting with a bypass pipe and supplying water from the second dwelling unit side to the first dwelling unit side. However, since there is a limit to the amount of water that can be covered by a single vertical pipe, even during the temporary period, it is necessary to calculate the number of units that can be covered in advance and calculate how many can be supplied simultaneously.

In addition, when the dwelling unit connected with the bypass pipe is adjacent on the same floor, the bypass pipe 1 can be shortened and the piping work is simple and preferable, but of course, it is not limited to this,
・ When the dwelling units (two or more dwelling units) connected by the bypass pipe are not adjacent but separated ・ When the dwelling units (two or more dwelling units) connected by the bypass pipe are on different floors Is not excluded from the scope of the present invention.

FIG. 1 is a schematic diagram (piping diagram) showing an example of a piping state before the start of maintenance work. FIG. 2 is a schematic diagram (piping diagram) showing a state in which the piping parts of each dwelling unit are connected by a bypass pipe. FIG. 3 is a schematic diagram (pipe diagram) showing a state in which each valve is switched to supply water to each dwelling unit from the second vertical pipe. FIG. 4 is a schematic diagram (piping diagram) showing how the first vertical pipe is removed. FIG. 5 is a schematic diagram (piping diagram) showing a state in which the first vertical pipe is newly installed. FIG. 6 is a schematic diagram (piping diagram) showing a state in which each valve is switched to supply water to each dwelling unit from the first vertical pipe and the second vertical pipe is removed. FIG. 7 is a schematic diagram (piping diagram) showing a state in which the second vertical pipe is newly installed. FIG. 8 is a schematic diagram (pipe diagram) showing a state where water is supplied from the first vertical pipe and the second vertical pipe to each dwelling unit by removing the bypass pipe and switching each valve. FIG. 9 is a flowchart showing an example of the procedure of the water supply vertical pipe maintenance method according to the present invention. FIG. 10 is a schematic diagram illustrating an example of the configuration of the branch unit. FIG. 11A is a cross-sectional view showing an example of the piping state before the maintenance work, and FIG. 11B is a cross-sectional view showing an example of the piping state after the maintenance work. Drawing 12 is a mimetic diagram showing an example of the structure of the multi-layer building which adopts an elevated water tank system as a water supply system. FIG. 13 is a schematic diagram illustrating an example of the structure of a multi-layer building that employs a pumping system as a water supply system. FIG. 14 is a schematic diagram (piping diagram) showing a state in which the piping parts of three dwelling units are connected by two bypass pipes. FIG. 15 is a perspective view showing an example of a conventional method for updating a vertical pipe. FIG. 16 is a schematic diagram showing another example of a conventional method for updating a vertical pipe.

Explanation of symbols

1 Bypass pipes A ₁ , A ₂ , ... Vertical pipe for water supply A _L 1st vertical pipe (vertical pipe for water supply)
A _R The second vertical pipe (water supply vertical pipe)
B ₁ , B ₂ Multiple layers buildings D _L first dwelling D _R second dwelling

Claims (3)

In the vertical pipe maintenance method for water supply in a multi-layer building, maintaining at least one water supply vertical pipe in a multi-layer building in which a plurality of water supply vertical pipes are arranged side by side so as to penetrate each floor,
A pipe portion of the first dwelling unit that receives water from a first vertical pipe that is a predetermined water supply vertical pipe, and a second vertical pipe that is different from the first vertical pipe receives water supply. Connecting the pipe part of the second dwelling unit that is connected by a bypass pipe;
Supplying the water of the second vertical pipe not only to the second dwelling unit but also to the first dwelling unit via the bypass pipe;
Stopping the supply of water to the first vertical pipe;
Maintaining the first vertical pipe in which the supply of water is stopped;
A vertical pipe maintenance method for water supply in a multi-story building. After the maintenance of the first vertical pipe is completed, the supply of water to the first vertical pipe is resumed, and the water of the first vertical pipe is not only supplied through the first dwelling unit but also through the bypass pipe. Supplying the second dwelling unit;
Stopping the supply of water to the second vertical pipe;
Maintaining the second vertical pipe in which the supply of water is stopped;
The vertical pipe maintenance method for water supply in a multi-story building according to claim 1. The maintenance is to update the vertical pipe or to rehabilitate the vertical pipe.
The vertical pipe maintenance method for water supply in a multi-layer building according to claim 1 or 2.

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