JP2001032335A - Facility and its design method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the design of a facility capable of the design of a layout in a building such as an apartment house and an office building by installing a plurality of vertical drain-pipes. SOLUTION: A drain system makes the low-rise part of H<7.8 m and the mid-to-high-rise part of H>=7.8 m the same piping structure, and shares a vertical drain-pipe 2. The length L of a drain horizontal main pipe is made L<7.1 m in accordance with the short low-rise part of a carrying distance. The piping constitutions of the low-rise part and the mid-to-high-rise part are same, and the workability or the like of piping inspection is made good in execution and completion. The length L of the drain horizontal main pipe is less than 7.1 m of the minimum carrying distance of substitution excrement, so that the excrement discharged from a toilet stool 5 is passed from a drain horizontal branch pipe 4 through the drain-pipe 2, does not stagnate and leave in the drain horizontal main pipe 1, and surely reaches a catch basin 6. Thereby, the design of layout can be freely performed in a building such as an apartment house and an office building.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for freely designing a floor plan of a building such as an apartment house or an office building, and a method of designing the same.

[Prior art]

[0002] Living water has been increasing year by year due to the improvement of living standards and the development of new types of housing equipment accompanying the diversification of lifestyles. On the other hand, under the influence of extreme weather worldwide, the rainfall trend in Japan has been continuing for a few years in recent years.
In some cases, our water supply is running short. Furthermore, from the viewpoint of global environmental conservation, the importance of securing water resources and effectively using water sources is being called out. Against this background, toilet flushes installed in houses, offices, and the like have significantly reduced the amount of flushing water in the past 10 years, and water-saving toilets have come to market. Housing /
Currently, the Urban Development Corporation is permitted to use water-saving toilets with a flush volume of 9 liters, and some local governments, like Fukuoka City, have established standards for water-saving toilets. is there. Outside of Japan, the development and introduction of water-saving toilets have been actively promoted mainly in European countries and the United States since the second oil crisis. In the United States, water regulations were enforced in a number of cities, such as Arizona and Massachusetts, under the leadership of the government. In this context, the manufacture of 13 liter flush toilets, which had been standard until now, was banned, and the use of 6 liter water-saving toilets with less than half the flush water volume was stipulated. In addition, the World Symposium on Water Supply and Drainage for Buildings held in Japan in 1997 (CIB-W6)
2 SYMPOSUM), various reports have been made on the importance of early development of water-saving appliances and their influence on the drainage system. Despite concerns about the impact on the drainage system due to the use of water-saving toilets, the ability to convey waste in the drainage system has not been fully studied, and the amount of water used on the appliance side has decreased. However, the drainage system is actually designed and operated in a conventional manner. In addition, the substitute waste used in the transport test used in the design of drainage pipes must simulate reality, have reproducibility, be durable, be economical, and be readily available. The following five conditions are required. For this reason, a material which can be elastically deformed, has high impact resistance and is hard to break is usually used. For this reason, in the test method specified by Better Living, which is the standard for transport tests in Japan, and the test based on the recommended standards specified in Fukuoka City, waste materials instead of rolled paper and sponge are used.

[Problems to be solved by the invention]

[0003] However, the sponge used as a substitute waste is one of the five conditions described above in which reproducibility, durability,
Although it satisfies the four conditions of economic and easy availability, it was questionable to simulate the reality.
Therefore, when adopting a water-saving toilet with a small amount of flushing water, designing drainage piping as before based on the results of a transport test using sponge-substituted waste is a solution to the problems raised by various reports. Of course, it could cause various troubles in the drainage piping. As described above, it is difficult to design an optimal piping by the conventional method, and if the safety aspect is emphasized too much while avoiding troubles, the quality becomes excessive and the cost and the space are wasteful. Therefore, in the present invention, particularly in buildings such as apartment buildings and office buildings where there are concerns about blockage of water distribution pipes, the introduction of a water-saving toilet bowl with a flushing water volume of less than 6 liters is safe and optimal without blockage. It is an object to provide a simple drainage system and a design method thereof.

[Means for Solving the Problems]

[0004] The present invention provides a facility for freely designing a floor plan of a building, which is provided with a plurality of drainage stacks, in order to solve the above problem. By installing a plurality of drainage stacks, it becomes possible to freely design a floor plan in a building such as an apartment house or an office building. In addition, by installing a plurality of drainage stacks, it is possible to easily and efficiently design equipment for freely designing a floor plan in a building such as an apartment house or an office building.

BEST MODE FOR CARRYING OUT THE INVENTION

[0005] The present invention is a drainage system in which a water-saving toilet with a flushing water volume of less than 6 liters is installed, and at least from a drainage stack base to a drain horizontal branch pipe connecting portion to which the water-saving toilet is connected. The height H of the drainage stack of
The sewage is almost crushed by falling in the drainage stack,
Part below the critical height of 7.8 m (lower part) where it can easily flow as a solid-liquid two-phase flow due to sewage in the drain horizontal main pipe
In the drainage system, the length L of the drainage horizontal main pipe into which the sewage discharged from the toilet bowl flows is set to L <7.1 m. Length L of drain horizontal main pipe
By setting L <7.1m, the waste will surely reach the drain and the waste will not stagnate in the main drain horizontal pipe, thus providing a safe and optimal drainage system without blockage. Will be possible.

The present invention is a drainage system in which a water-saving toilet having a flushing water volume of less than 6 liters is installed. In a low-rise piping configuration of at least H <7.8 m, the length L of the drainage horizontal main pipe is reduced. 20m> L ≧ 7.1m, and the drainage system is characterized in that a toilet bowl with a flushing water amount of 6 liters or more is placed in the lower part. Wash water amount 6 in lower part
By placing a toilet bowl of liters or more, it is possible to extend the transfer distance of the waste that has flowed down from the lower part where the transfer distance is short within the horizontal drain main pipe without causing waste crushing. Since it is possible to reliably reach the drainage without stagnation or remaining in the horizontal main pipe, it is possible to provide a safe and optimal drainage system without blockage or blockage.

[0007] The present invention is a drainage system in which a water-saving toilet bowl with a flushing water amount of less than 6 liters is installed. In a low-rise piping configuration of at least H <7.8 m, the length L of the drainage horizontal main pipe is reduced. 20m> L ≧ 7.1m, and a drainage system characterized by having a waste crushing means in or on the drainage pipe before flowing into the horizontal drainage main pipe. By having the filth crushing means, filth crushing does not occur and also crushes the filth that has flowed down from the lower part of the short transport distance in the drain horizontal main pipe, and a sufficient transport distance can be obtained in the drain horizontal horizontal pipe, It is possible to provide a safe and optimal drainage system without any clogging or blockage.

[0008] The present invention is a drainage system in which a water-saving toilet having a flushing water amount of less than 6 liters is installed. In a low-rise piping configuration of at least H <7.8 m, the length L of the horizontal drainage pipe is reduced. 20m> L ≧ 7.1m, and the drainage horizontal main pipe is a drainage system characterized by using a pipe having a longitudinally long cross section whose cross section has a pipe bottom narrowing with respect to the pipe width. By using a pipe with a vertically long cross section where the bottom of the pipe is narrower than the width of the pipe, the water depth in the pipe can be secured, so that the dirt flows down on the water,
It is possible to extend the transport distance, and it is possible to provide a safe and optimal drainage system without waste remaining in the horizontal drain main pipe, that is, without any blockage.

The present invention is a method for designing a drainage system in which a water-saving toilet having a flushing water volume of less than 6 liters is installed, wherein at least a low-rise piping configuration of H <7.8 m is discharged from the toilet. The length L of the drain horizontal main pipe into which wastewater flows into is set to L <7.1 m. The length L of the drain horizontal main pipe is L <
By setting the height to 7.1 m, the waste will surely reach the drain and the waste will not stagnate in the horizontal drain main pipe. It can be done efficiently.

The present invention relates to a method for designing a drainage system in which a water-saving toilet bowl with a flushing water volume of less than 6 liters is installed, wherein the drainage horizontal main pipe has a length of at least H <7.8 m. The drainage system design method is characterized in that L is 20 m> L ≧ 7.1 m, and a toilet having a flush water amount of 6 liters or more is placed in the lower part.
By placing a toilet bowl with a flushing water volume of 6 liters or more on the lower part, waste can be crushed and the transport distance of the waste that has flowed down from the lower part where the transport distance is short in the main drain horizontal pipe can be extended. Waste will stagnate in the horizontal drain
It is possible to design a safe and optimal drainage system that can reach the drainage area without remaining, that is, without clogging.

The present invention relates to a method for designing a drainage system in which a water-saving toilet having a flushing water amount of less than 6 liters is installed, wherein at least a low-rise piping configuration has a length L of drainage horizontal main pipe of 20 m> L ≧ L The drainage system is designed to be 7.1 m and provided with a waste crushing means in or on the drainage pipe before flowing into the horizontal drainage main pipe. By having the filth crushing means, filth crushing does not occur and also crushes the filth that has flowed down from the lower part of the short transport distance in the drain horizontal main pipe, and a sufficient transport distance can be obtained in the drain horizontal horizontal pipe, It is possible to design a safe and optimal drainage system without any clogging or blockage.

The present invention relates to a method for designing a drainage system in which a water-saving toilet having a flushing water volume of less than 6 liters is installed, wherein at least a low-rise piping configuration has a length L of a drain horizontal horizontal pipe of 20 m> L ≧ L ≧ 20. A drainage system design method is characterized in that a 7.1 m long vertical cross-section pipe having a cross-sectional shape in which the bottom is narrower than the pipe width is used as the drain horizontal main pipe. By using a pipe with a vertically long cross section where the bottom of the pipe is narrower than the pipe width, it is possible to secure the water depth in the pipe, so that dirt flows down on the water and extends the transport distance. Therefore, it is possible to design a safe and optimal drainage system without waste remaining in the horizontal drain main pipe, that is, without any blockage.

[0013] In the present invention, the height H in the drainage stack from the base of the drainage stack to the junction of the drainage lateral branch pipe to which the water-saving toilet is connected is defined as the low-rise portion, and the waste falls in the drainage stack. This is a portion where the critical height is lower than 7.8 m, that is, a portion where H <7.8 m, at which the water can easily flow as a solid-liquid two-phase flow by sewage in the drain horizontal main pipe. On the other hand, the middle / high-rise portion is a portion where H ≧ 7.8 m. The sewage is pulverized in the middle and high layers, and the transport distance in the horizontal drain main pipe is sufficient, but the transport distance in the horizontal drain main pipe is short in the low-rise sections where the waste is not crushed. Therefore, it is preferable that at least the length of the drain horizontal main pipe in the low-rise portion is adjusted to the case where the transport distance is shortest in the low-rise portion. However, when the transfer performance with respect to the length of the drain horizontal main pipe is not sufficient, for example, by providing a waste crushing means, increasing the amount of washing water for the installed equipment, and making the water depth deeper in the pipe, the transfer distance can be increased. It is also possible to extend. Note that the flush water amount is the actual drainage amount actually discharged from the toilet. As the waste crushing means, a method of crushing by applying some energy from the outside such as installing a crushing device equipped with a cutter, crushing by oscillating the tube, crushing by providing protrusions in the tube, in the tube There is a method of utilizing the energy of an object such as crushing waste by impact. It is preferable to pulverize filth by the impact of natural fall without using power. It is effective for maintenance and maintenance because there is no concern about running costs and mechanical troubles, and there is no possibility that dirt is caught on the device and the like. Since the transport distance in the lower part where the waste is not pulverized depends on the amount of flush water in the toilet, it is also effective to increase the flush water in the toilet installed in order to extend the transport distance. It is possible to use a toilet bowl with a drainage amount of 6 liters or more, or to prepare a toilet bowl with a selectable flushing water amount in advance, and set the flushing water amount later according to the piping configuration. In order to extend the transport distance in the horizontal drain main pipe, a pipe having a deeper water depth may be used as the horizontal drain pipe. The uncrushed waste flows down behind the water, stops when it comes into contact with the pipe when the water depth becomes shallow, and stays in the pipe. Therefore, a pipe that can ensure the water depth in the pipe, for example, a substantially oval, substantially oval, bottom and corners are R-shaped substantially inverted triangles and substantially rhombic shapes. A tube having a vertically long section having a sectional shape is used. Although a pipe having a vertically long cross section may be used from the beginning, it is preferable that the pipe be changed in the middle so as to keep the water depth as constant as possible. As a position where the pipe cross section is changed, it is preferable that the distance from the base of the drainage stack be less than the minimum transport distance 7.1 m of the substitute waste. Since the water depth in the pipe can be maintained, the waste can flow down on the water and the transport distance can be increased.

In the middle and high-rise buildings, when the actual transportation of waste is considered, the optimal design condition of the drainage pipe in which the toilet is installed changes depending on whether or not the waste is crushed. Since the optimum piping conditions are different between the lower part where the waste is not pulverized and the middle and higher parts where the waste is pulverized, it is desirable that the piping structure is different between the two. In the low-rise part where the waste is not pulverized, there is little difference in physical behavior between the actual waste and the pseudo waste such as sponge. Therefore, it is desirable that the piping structure conform to the conventional piping design conditions.
However, in the middle and high-rise areas where waste crushing occurs, the physical behavior differs between actual waste and simulated waste such as sponge, and the transport distance is greatly different.Therefore, it is necessary to adopt a piping structure different from the conventional piping design conditions. it can. That is, it is possible to make the length of the drain horizontal main pipe different between the low-rise section and the middle / high-rise section. In a desirable mode of the present invention, the length of the drain horizontal main pipe differs between the low-rise section and the middle / high-rise section. In particular, the drainage horizontal main pipe in the lower part where the filth crushing does not occur and the filth transport distance is short is shorter than the drainage horizontal main pipe in the middle and high layer where the filth crushing occurs and the filth transport distance is long, so that there is no blockage A safe and optimal piping structure can be obtained. In particular, the middle and high-rise sections are not affected by the low-rise section piping structure, so that a free piping structure can be obtained, and thus the structure and layout of the building can be freely designed. Therefore, in a desirable mode of the present invention, the length of the drainage horizontal main pipe is made different by making the drainage stack pipe different between the low-rise section and the middle and high-rise sections. In this case, the length L1 of the drainage horizontal main pipe in the lower part is set to L1 <7.1 m in consideration of the minimum transport distance of the substitute waste of miso. In a middle / high-rise part where filth crushing occurs and the filth transport distance is long, as the H is higher, the filth is finely crushed and liquefied. Therefore, the length L2 of the drainage horizontal main pipe in the middle / high-rise section is not particularly limited. However, in order to transport waste more reliably at any height in the middle / high-rise section, L2 ≦ 12.9 / 6. .8 * H + 17.69 /
It is preferable that H is 3.4 at this time, and H is the height of the lowest part in the middle and high layers.

It is also possible to use the drainage from other equipment to flush away the waste, taking into account in advance that the transport distance is short and that the wastewater will stay in the middle of the horizontal drain main pipe. In that case, a wash basin, a bathroom, and the like are provided upstream of the toilet with respect to the drain horizontal branch pipe, and drainage of water for a wash basin, a bath tub, and the like is used to flush away accumulated dirt.

A description will be given below with reference to the drawings. FIG. 1 is a diagram showing a drainage system according to one embodiment of the present invention. The low-rise section of H <7.8 m and the middle / high-rise section of H ≧ 7.8 m have the same piping structure, and are a drainage system in which the drain stack 2 is shared. The length L of the drain horizontal main pipe is set to L <7.1 m in accordance with the low-rise portion where the transport distance is short. By using the same piping structure as the low-rise and middle-high-rise sections and sharing the drainage stack, workability and workability of pipe inspection at the time of completion are improved. The low-rise part and the middle-high-rise part have the same piping configuration, and the length L of the drain horizontal main pipe is set to be less than the minimum transport distance 7.1 m of the substitute waste close to the actual waste, so that the waste discharged from the toilet 5 is Through the drain horizontal branch pipe 4, through the drain stack 2, the water reaches the drain 6 without stagnation or remaining in the horizontal drain main pipe 1.

FIG. 2 is a view showing a drainage system according to one embodiment of the present invention, in which the piping structure is different between the low-rise section and the middle and high-rise sections. Middle / high rise drainage stack 2a and low rise drainage stack 2
b) is provided separately, and the length of the main drainage horizontal pipe is different between the middle / high-rise section and the low-rise section.The drainage horizontal main pipe of the low-rise section is shorter than the drainage horizontal main pipe of the middle / high-rise section. is there.
Since the middle and high-rise sections are not affected by the low-rise section piping structure, a free piping structure can be provided, and thus the structure and layout of the building can be freely designed.
The length of the drain horizontal main pipe from each drain stack base 3 to the drain basin 6 is the length of the horizontal drain main pipe L1 of the low-rise part where the waste is not crushed and the waste transport distance is short. In consideration of the minimum transport distance, L1 <7.1 m, and the length L2 of the drainage horizontal main pipe in the middle / high-rise section is L2 ≦ 12.9 / 6.8 * H + 1.
By setting the ratio to 7.69 / 3.4, it becomes possible for the waste to reliably reach the drainage level without stagnating or remaining in the horizontal drainage main pipe. In middle and high-rise areas where filth crushing occurs and the filth transport distance is long, the higher the H, the more the filth is finely crushed and liquefied, so the transport distance in the horizontal drain main pipe is extended, and care is taken of stagnation and residual You don't have to.

FIG. 3 is a view showing a drainage system according to an embodiment of the present invention, in which the equipment configuration is different between a low-rise section and middle and high-rise sections. A low-rise part and a middle / high-rise part have the same piping structure, and the drain horizontal main pipe length is L ≥ 7.1 m. The installed drainage system. Since the transfer performance of uncrushed waste depends on the amount of flush water in the toilet, if the transfer performance for the length of the horizontal drain main pipe is not sufficient, a toilet with a large amount of flush water is installed. The toilet bowl installed at this time may have a fixed flushing water amount, but a toilet bowl with a selectable flushing water amount is more preferable because an optimal flushing water amount can be set according to the piping configuration. By installing a toilet bowl with a larger amount of washing water than the middle and high sections in the lower section, a sufficient transport distance can be obtained within the horizontal drain main pipe, so that sewage does not stay or remain in the horizontal horizontal drain pipe.
It is possible to reliably reach various basins and drain mains. As a result, the occurrence of clogging in the horizontal drain main pipe can be prevented.

FIG. 4 is a diagram showing a waste crushing means according to an embodiment of the present invention. In order to extend the transport distance, a meandering pipe 7 is connected to the drainage stack 2 as a means of grinding waste.
If the pipe is meandering in an S-shape while maintaining the pipe diameter, it becomes possible to grind the waste while maintaining the drainage performance. The filth that has fallen freely in the drainage stack 2 is the lower surface 8a of the wall of the meandering pipe 7.
Then, it flows down along the tube wall lower surface 8a, and further collides with the tube wall lower surface 8b thereunder. While repeating this operation, the waste is drained into the drain stack base 3, the drain horizontal main pipe 1
To reach. The falling speed of the filth falls due to the collision with the meandering pipe 7, and the water flowing down later catches up with the filth, and the filth and the water are mixed, so that the filth becomes soft and easily crushed. In this way, the sewage collides with the pipe wall and is crushed or adhered to the pipe wall and becomes smaller.Therefore, it is possible to secure a sufficient transport distance of the sewage in the horizontal drain main pipe and improve the flow performance in the horizontal drain main pipe. Becomes possible. In addition, since the flow velocity of the water is reduced by hitting the gentle slope, the pressure fluctuation in the drainage pipe is prevented, and as a result, it is possible to prevent the trap from being completely sealed or the backflow of the drainage horizontal branch pipe.

FIG. 5 is a diagram showing a horizontal drain main pipe according to an embodiment of the present invention. To extend the transport distance, the bottom 11 of the drain horizontal main pipe 1 gradually increases in comparison with the pipe height 12,
A pipe having a vertically long cross section having a cross section shape in which the width 13 is reduced is provided. As shown in FIG. 5, by changing the cross-sectional shape of the drain horizontal main pipe from a circular shape to a substantially elliptical shape or a substantially oval shape on the way, the water depth in the piping can be secured, so that the filth flows down on the water. In addition, the transport distance can be extended, and a drainage system can be provided in which no waste remains in the horizontal drain main pipe. In addition to the substantially elliptical shape shown in FIG.
A tube having a sectional shape shown in FIG. 6 can also be used. By using a tube having a small cross-sectional area of the tube bottom 11 such as a substantially inverted oval shape a, a substantially inverted triangular shape b having an R-shaped bottom portion, and a substantially rhombic shape c so that the water depth can be increased with the same amount of water, the inside of the pipe can be reduced. Water depth can be secured. By arranging these cross-sectionally shaped pipes in the horizontal drain main pipe, waste can flow down on the water and the transport distance can be extended, and a drainage system with no waste in the horizontal drain main pipe Becomes possible.

(Experiment) Miso was selected as a substitute waste having a behavior very similar to that of actual waste, and a drainage transfer test was conducted with a drainage system shown in FIG. 7 while comparing it with a conventional substitute of sponge waste. Carried out. In addition, the quantity of substitute waste was determined in accordance with the recommended standard test of Fukuoka City, and the tested toilets were 5.42 liters (6 liters) of flush water and 8.67 liters (9 liters) of flush water.
Was used. Fukuoka City Recommended Criteria: 4 sponges + 7 toilet papers Selected sewage: 5 miso pastes + 7 toilet papers Sponge: PVA (polyvinyl alcohol), the shape is hemispherical at both ends as shown in Fig. 8 Cylindrical shape,
It has a length of 74 mm when dried, a diameter of 21 mm, a length of 80 mm when swelled, a diameter of 25 mm, a weight of 37 g, and a specific gravity of 1.
A small hole was provided in the heart of the substitute waste so as to give a value of 05, and adjustment was made by inserting small beads of lead. Miso: 200 g of miso with a water content of 50% and a specific gravity of 1.25
It was equally divided and molded into the same shape as the sponge. In general, it is said that the stool water content of a healthy adult is 70 to 80%.
When the water content is 60% or less, such as in the case of constipation, it hardens.
Here, assuming a hard stool, the water content was set to 50%.
Also, the weight of miso is 10% of the amount of stool discharged by healthy adults.
Since it is 0 g to 200 g, the maximum value was set to 200 g. Toilet paper: A 760 mm long paper as defined by JISP4501 with a diameter of 50 to 70 m
Those rounded to m were used.

FIG. 9 shows the transfer distance of each substitute waste in the 6-liter toilet bowl. As a result of the experiment, when the substitute waste was miso, the height from the bottom of the drainage stack to the connecting portion of the drainage horizontal branch pipe was 7.8 m or more, and the waste was crushed. By the crushing, the transport distance in the horizontal drain main pipe was increased. The transport distance of the crushed filth was 20 m or more in each toilet.
On the first floor (1 m height) of the installation floor, the transfer distance of each toilet was the minimum, and the 9-liter toilet was 20 m and the 6-liter toilet was 7.1 m. On the other hand, when the substitute waste is a sponge, if the height from the base of the drainage stack to the junction of the drainage horizontal branch pipe is 7.8 m or more, when entering the drainage horizontal main pipe from the drainage stack, Collision caused a jump, which reduced the transport distance in the horizontal drain pipe. The minimum conveying distance of the sponge was 4.3 m, and the height from the bottom of the drainage stack to the junction of the horizontal drainage branch at that time was 18 m.
At higher heights, the transport distance did not change.

The results differ greatly between the case where the substitute waste is miso and the case where sponge is used. In particular, in the case of sponge, the behavior peculiar to the elastic body was exhibited. It is close to real filth and is considered valid. If the filth is crushed, the transport distance increases, which suggests that it is effective to provide a filth crushing means in a low-rise part where the filth is not crushed. Further, in the low-rise part where the waste is not pulverized, since the transfer distance of the waste depends on the amount of flush water in the toilet, it is suggested that it is effective to use a large toilet with a large amount of flush water in the low-rise part.

[0024]

According to the present invention, it is possible to freely design a floor plan in a building such as an apartment house or an office building.

[Brief description of the drawings]

FIG. 1 is a diagram showing a drainage system according to an embodiment of the present invention.

FIG. 2 is a view showing a drainage system according to an embodiment of the present invention, in which a piping structure is different between a low-rise section and middle and high-rise sections.

FIG. 3 is a diagram showing a drainage system according to an embodiment of the present invention, in which a low-rise section and middle / high-rise sections have different instrument configurations.

FIG. 4 is a diagram showing a waste crushing unit according to an embodiment of the present invention.

FIG. 5 is a diagram showing a drain horizontal main pipe according to an embodiment of the present invention.

FIG. 6 is a view showing another example of a cross section of a drainage horizontal main pipe according to an embodiment of the present invention.

FIG. 7 is a diagram showing a drainage system used in the experiment.

FIG. 8 is a view showing the shape of a substitute waste (sponge).

FIG. 9 is a graph showing the transfer distance of each substitute waste in the 6-liter toilet bowl.

[Explanation of symbols]

1: Drainage horizontal main pipe 2: Drainage stack 2a: Middle / high rise drainage stack 2b: Low rise drainage stack 3: Drainage stack base 4: Drain horizontal branch pipe 5: Toilet bowl 6: Drainage basin 7: Meandering Pipe 8: Lower surface of meandering pipe wall 11: Pipe bottom 12: Pipe height 13: Pipe width

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Tomonari 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Touchi Kiki Co., Ltd. (72) Inventor Shosaku Noda Kokurakita-ku, Kitakyushu-shi, Fukuoka 2-1-1 Nakajima Totoki Kiki Co., Ltd. (72) Inventor Kaori Morihara 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka F-term in Totoki Kiki Co., Ltd. 2D060 AA10 AB03

Claims (2)

[Claims] 1. A facility for freely designing a floor plan of a building, wherein a plurality of drain stacks are provided. 2. A method of designing a facility for freely designing a floor plan of a building, wherein a plurality of drainage stacks are installed.