JP2001026960A - Flush toilet stool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an amount of water used in one time washing without causing inconveniences such as adhesion of dirt on a bowl face and reduction of discharge performance of soil in a flush toilet stool. SOLUTION: A peripheral wall of a bowl part 20 of a stool 10 is extended at gentle slope from below right and left rims 21 toward the direction of center of the stool 10 and then is greatly bent in the direction of a recessed part in a first bent part 53 positioned at slightly upper position than an ordinary water level line WL for sealing water. The peripheral wall extended in the direction of bending is greatly bent in the direction of inner side in a second bent part 54 shortly after exceeding the ordinary water level line WL and is extended by about 40 mm in the direction of center of the stool 10 at gentle downward slope. A stepped part 58 crossing the ordinary water level line WL is formed in the bowl part 20 due to the extension of the peripheral wall. That is, the bowl part 20 overhangs in the direction of center of the stool at least by 40 mm from the second bent part 54 on the left side of the stool 10 and by 40 mm from the second bent part 54 on the right side. On the other hand, a height from a water bottom face to the ordinary water level line WL is about 113 mm to ensure sufficient water level for sealing water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a flush toilet.
Specifically, a bowl portion for receiving waste, a connection path connected to a discharge port formed at the bottom of the pot section, and communicating with the connection path,
A rising path extending upward from the communication position, wherein water is formed by the water stored in the bowl, the connection path, and the rising path, and the supply of washing water to the bowl is performed. hand,
The present invention relates to a flush toilet that feeds water from the discharge port to the connection path and the ascending path, which are flow paths, and guides water and dirt passing through the ascending path to a position below a drain pipe.

[0002]

2. Description of the Related Art It is desirable that the amount of water used for washing a toilet bowl be small from the viewpoint of resource conservation. In particular, in areas where water resources are at a premium, a large amount of flushing water in the toilets provided in each house has a significant effect on the water shortage in the entire area, and this problem is important.

In a conventional flush toilet, about 8 to 10 liters of water is used in one large flush. In order to reduce the amount of water used, it is necessary to reduce the amount of water supplied to the toilet, for example, in the case of a so-called low tank tightly-closed toilet in which the toilet and the tank are closely connected to the rear of the toilet. It is necessary to reduce the amount of water flowing out of the tank in one washing operation.

[0004]

However, when the amount of water stored in the tank is reduced to reduce the amount of water flowing out, not only the amount of water supplied to the toilet bowl but also the water level in the tank decreases. The momentum of the water supplied into the toilet is also reduced. Therefore, if the amount of water stored in the tank is reduced and less than 8 liters of water is used in one large flush, it is not possible to reliably clean the bowl surface of the toilet bowl and discharge waste.

On the other hand, the toilet is provided with a predetermined level of water sealing at the bottom of the toilet in order to prevent the backflow of odor and the invasion of pests from the drain pipe. This water seal is replaced with fresh water from the tank each time the toilet is flushed. Therefore,
By reducing the amount of sealed water, it is also possible to reduce the amount of water stored in the tank.

However, if the amount of sealed water is simply reduced,
The disadvantage is that the amount of accumulated water in the pots also decreases, so that the wastes cannot be sufficiently isolated from the atmosphere by the accumulated water, and odors are emitted into the room after the stool, and the dirt of the wastes tends to adhere to the pot surface. was there.

Also, a siphon toilet having a drain channel bent up and down and discharging wastes by utilizing a siphon effect caused by a water level difference from a bowl portion of the toilet bowl when the bent portion of the drain channel is filled with water is provided. In such a case, it is necessary to reduce the height of the bent portion of the drainage channel in order to reduce the amount of sealed water. However, when the height is reduced, the difference in water level between the inside of the bowl and the toilet is reduced. For this reason, the pulling force in the drainage direction generated by the siphon action is weakened, and there is a possibility that the waste cannot be reliably discharged.

Therefore, the present invention solves the above problems,
The following configuration is adopted for the purpose of realizing a reduction in the amount of water used by one washing without causing inconveniences such as fixation of dirt on the pot surface and deterioration of dirt discharge performance. .

[0009]

The first flush toilet of the present invention comprises a bowl for receiving dirt, a connection path connected to an outlet formed at the bottom of the bowl, A rising path communicating with the connection path and extending upward from the communication position; forming a water seal with the water stored in the pot portion, the connection path and the rising path; With the supply of the flush water, the flush toilet is configured to send water from the outlet to the connection path and the ascending path, which are flow paths, and guide water and dirt passing through the ascending path to a position below the drain pipe. In the above, the bowl, the connection path, and the ascending path are shaped so that the amount of stored water at the time of forming the sealed water is 1.1 liter or more and 1.45 liter or less, and the bowl is mainly located at a position where filth falls. Vertical height of the sealed water from the surface to the surface of the stored water And summarized in that the at least 85 millimeters or more values.

[0010] According to the flush toilet of the present invention, the bowl, the connection path, and the ascending path are formed so that the amount of stored water at the time of forming the sealed water is 1.1 liter to 1.45 liter. I do. With this configuration, the amount of water that is replaced by a single cleaning operation is reduced, so that the amount of water used during cleaning can be reduced.

On the other hand, the vertical height of the sealed water from the bowl surface where the waste falls to the surface of the stored water is at least 85 mm or more. With this configuration, a contact area of the pot portion with the water sealing is secured, so that it is not promoted that dirt adheres to the pot surface or odor is dissipated after stool. In other words, since the amount of water sealing is reduced while securing the height of the water sealing,
It is possible to realize both a pot surface that is hardly soiled and water saving.

[0012] A second flush toilet of the present invention comprises a bowl for receiving filth, a connection path connected to an outlet formed at the bottom of the bowl, and a communication path with the connection path. An upward path extending upward, and a downward path continuous with the upward path and extending downward from the end of the upward path where a drain pipe is located; The stored water stored in the passage forms a seal at a height corresponding to the height of the ascending passage, and the connection, which is a flow path from the discharge port, is supplied along with the supply of the washing water to the pot portion. A siphon-type flush toilet that guides the water and dirt from the ascending route to the descending route by using a siphon effect generated by sending water to the ascending route and the ascending route, When the amount of water stored in the pot at the time of forming the sealed water is 0.7 liter or less. A shape equal to or less than 1.2 liters, primarily the vertical height of sealing water from the bowl surface to be the position of the waste fall to the water surface of the reservoir water, and summarized in that the value of more than at least 85 millimeters.

According to the siphon flush toilet of the present invention,
The shape of the pot portion is such that the amount of water stored in the pot portion at the time of forming the sealed water is 0.7 liter or more and 1.2 liter or less. With this configuration, the amount of water that is replaced by a single cleaning operation is reduced, so that the amount of water used during cleaning can be reduced.

On the other hand, since the vertical height of the sealed water from the bowl surface where the waste falls to the surface of the stored water is at least 85 mm or more, the siphon action can be stably generated. In addition, it is possible to reliably discharge waste. That is, since the amount of water sealing is reduced while the height of the water sealing is ensured, it is possible to save water while ensuring the drainage performance of the toilet.

If a shallow step portion is provided on the inner wall of the pot portion except for the substantially central portion of the pot portion, the capacity of the pot portion is reduced by the presence of the step portion. It is possible to reduce the amount of water. If this step is provided with a length of 40 mm or more from the left inner wall toward the center of the pot and 40 mm or more from the right inner wall toward the center of the pot, the amount of water sealed in the pot is reduced. It can be greatly reduced.

Furthermore, if the size of the surface of the water stored in the pot portion is set to a value of not less than 180 mm in depth and not less than 140 mm in width among the stored water forming the sealed water, the area of the sealed water is siphon type. It can be as wide as a toilet, and it is possible to prevent the attachment of dirt to the bowl and the emission of odor from the bowl. It is more effective if the size of the water surface is secured to a depth of 225 mm or more and a width of 185 mm or more.

If the amount of water stored in the connecting passage and the ascending passage of the stored water forming the sealed water is set to a value of 0.4 liter or more and 0.6 liter or less, it is replaced by one washing. Since the amount of water used is further reduced, the amount of water used at the time of cleaning can be further reduced. For example, it is possible to consider a configuration in which the inside diameter from the connection path to the rising path in the portion where the stored water is stored is substantially the same.

A water conduit for guiding the wash water supplied to the toilet to the outlet is provided at a position lower than the water sealing, and a jet ejecting mechanism for ejecting the wash water from the water conduit toward the outlet is provided. The amount of water stored in the headrace channel among the stored water forming the seal may be set to a value of 0.6 liter or less.
Water that accumulates in the headrace is also replaced each time washing is performed. Therefore, by reducing the amount of accumulated water, the amount of water used during washing can be reduced.

If the discharge amount of the washing water per one washing operation is set to a value of 3 liters or more and 7 liters or less due to the decrease in the amount of sealed water described above, it is possible to provide a toilet bowl with a high water saving effect.

It is also preferable that the shape of the inner wall of the bowl is asymmetric with respect to the longitudinal axis of the toilet. In this way, when the toilet is washed, the water in the bowl is swirled,
This turning force can further improve the waste discharging performance.

The amount and shape of the stored water in the bowl portion are as follows. The amount of the stored water in the bowl portion is 0.7 to 1.2 liters, and the distance between the main filth drop position (bowl surface) and the stored water surface is 85 m.
m or more is preferable. At this time, the minimum amount of water below the shelf is
0.3 liter, and the depth of the pool water is preferably 15 mm to 5 mm. When a person sits on the toilet seat placed on the toilet, the anal position relative to the water surface is shifted depending on the age, body type, and the like of the person. (In the case of an adult: 153 mm from the toilet seat mounting hole ± 30 mm in the front-rear direction) As a defect that occurs at this time, the filth falling from the anus jumps out of the water basin in the toilet bowl, or falls below the water basin depending on the shape of the filth. This is because some of the filth may not be able to fit in and may protrude above the water surface.

The protrusion outside the reservoir surface can be removed by washing the bowl by discharging water from the rim. However, the protrusion of dirt in the reservoir surface above the reservoir surface is unavoidable depending on the reservoir volume and shape. In this case, since the filth is exposed to the air, the odor leaks, which is very uncomfortable. In view of this, in the present invention, the position where the waste falls, the volume of the stored water, and the depth of the stored water in each part are optimized to the above-mentioned numerical values. As a result, the sewage sinks into the water surface,
It is possible to excrete the odor very comfortably without leaking the odor to the outside.

In consideration of the washing method for each alternative waste, the amount of stored water is 1.1 to 1.45 liters, the minimum amount of water below the shelf is 0.3 liter, and the The depth of the stored water is preferably 15 mm to 5 mm. That is, the shape and physical properties of the waste discharged from humans are various, and the cleaning performance of the toilet bowl for cleaning the waste must correspond to all of them. Waste is classified into two major types depending on its specific gravity and shape. One is high specific gravity waste which is heavier than water and sinks to the bottom of the bowl, and the other is suspended fine waste which is lighter and finer than water.

According to the present invention in which the amount of stored water is 1.1 to 1.45 liters, the volume of the high-specific-gravity waste can be secured with a volume equal to or less than the shelf. In addition, since the minimum amount of stored water below the shelf is 0.3 liter and the depth of the stored water in the shelf is 15 mm to 5 mm, it is easy to swirl the suspended fine particulate matter so that it can be swirled and collected at the center of the pool surface. Thereby, the high-specific-gravity filth can be completely settled in the reservoir surface, and there is no generation of smell. In addition, it is possible to more effectively turn the entire pool by swirling the pool water with the rim spouting water.

Further, the inner diameter of the trap is 50 to 60 mm,
It is preferable to reduce the volume of the trap section to 0.45 liter to 0.6 liter, preferably to 55 mm, and to set the amount of stored water to a depth of 100 mm. In a siphon toilet, it is necessary to fill the inside of the trap with washing water at an early stage in order to cause the siphon to occur early and reduce the amount of water used before the siphon occurs. One possible solution is to reduce the volume in the trap. However, if the trap volume is reduced, it may not be possible to pass through the trap depending on the shape of the waste, and cleaning failure may occur.

Therefore, in the present invention, the relationship between the trap volume and the cleaning performance of the waste is studied, and the volume can be reduced while satisfying various assumed cleaning performance of the waste by setting the cross-sectional area of the trap to φ50 mm to φ60 mm. Was obtained. By doing so, the upper edge of the trap entrance can be set to 50 mm from the bottom of the bowl, so that time until air enters the suction port, that is, until the siphon is cut off, the duration of the siphon increases, and cleaning of dirt is performed. Strength can be improved.

Therefore, according to the present invention, the volume in the trap is reduced, and the amount of water required until the siphon is generated can be reduced, so that a water-saving siphon toilet can be manufactured efficiently.

It is preferable that the amount of water below the shelf be 0.3 liter or more. This indicates that the minimum waste diameter is 1.5 cm and the minimum waste length is 1
0.0 cm, minimum waste volume 17.67 cubic centimeters, and maximum waste diameter 4.0 cm, maximum waste length 2
It is known to be 0.5 cm, maximum soil volume 257.61 cubic centimeters, and also average soil volume 143 cubic centimeters.

This maximum volume of filth sinks below the water level,
Need to move freely during washing. Therefore,
It is preferable that the amount of water stored below the shelf be at least 0.3 liter.

Further, the following two optimum distances were found to prevent change. The first is the distance from the seat surface to the water surface in order to reduce the energy of falling filth, and is preferably 130 mm or less. Secondly, in order to reduce the amount of water that bounces off (the water that has been displaced),
It is preferable to make the water depth of the bowl surface in the bowl where the dirt mainly falls down as shallow as 85 mm or less. With such a configuration, it becomes possible for the filth to be accommodated in the pool surface, and since it is not exposed outside the pool surface, it is possible to excrete comfortably without generation of odor.

Further, in a siphon toilet (approximately 200 mm in raffin) having a substantially inverted U-shaped trap whose trap discharge port descends substantially vertically, the amount of pooled water in the presence of a Z water channel is 1.7 liters to 2.0 liters. It is preferable to set it to 2 liters, and it is more preferable to set this pooled water amount to 1.9 liters to 2.1 liters. In addition, when there is no Zet headrace, it is preferable to set the amount of water to 1.2 liters to 1.7 liters, and it is more preferable to set the amount of water to 1.4 liters to 1.6 liters.

That is, the siphon toilet having the trap of a substantially U-shape can obtain a strong siphon force due to reduced pressure loss. However, since the siphon power is strong and the stored water in the bowl is drained instantaneously, unless the amount of stored water is set to the optimum value, it is impossible to catch up with the instantaneous drainage of water, and only the suspended particulate matter will be on the bowl surface. The problem that it remains inside is caused.

Therefore, the amount of pooled water in the presence of the Z water headrace is set to 1.7 liters to 2.2 liters, and the high specific gravity contaminants sinking on the bottom of the bowl are determined by the combination of the strong jet flow from the jet port and the siphon force. It can be discharged, and the floating particulate waste can also be discharged from the bottom of the ball toward the trap. In the case of the accumulated water volume of 1.9 liters to 2.1 liters, sufficient discharge performance was confirmed also for high specific gravity soil, suspended fine particulate soil, and a mixed waste thereof.

When there is no Zet headrace channel, the amount of the accumulated water is set to 1.2 liters to 1.7 liters, and by increasing the amount of rim washing water, a sufficient turning time of the accumulated water can be ensured. A large rise in the water surface can generate a large force siphon. Further, with this amount of stored water, the function as stored water such as submergence of waste can be sufficiently exhibited. In particular, the accumulated water volume is 1.4 liters or more.
In the case of 1.6 liters, sufficient discharge performance was confirmed also for high specific gravity waste, suspended fine particulate waste, and a mixed waste thereof.

When the actual tank capacity is 4 liters to 6 liters and there is a Z water headrace, it is preferable that the ratio between the actual tank capacity and the amount of stored water is 1.8 to 3.5. It is more preferable to be 1.9 to 3.2. It is even more preferable that this ratio be 1.9 to 2.1. When the actual tank capacity is 4 liters to 6 liters and there is no Zet headrace, the ratio between the actual tank capacity and the amount of stored water is 2.
The ratio is preferably set to 4 to 5.0, and the ratio is set to 2.5 to 4.3.
Is more preferable. It is even more preferable that this ratio be 2.5 to 2.9.

In the siphon toilet having such a configuration, while ensuring a sufficient amount of stored water to function as stored water,
In addition, it is possible to obtain the actual capacity of the tank that generates a siphon phenomenon that can reliably discharge various kinds of dirt such as high-density dirt, floating fine dirt, and mixed dirt. As a result, a siphon-type water-saving washing with a drastically reduced total drainage can be realized. In addition, by designing a siphon toilet while strictly maintaining this ratio, a siphon toilet with water-saving cleaning can be easily commercialized.

[0037]

Another Embodiment of the Invention As another embodiment of the invention, the following design method can be considered. 3. A method for designing a flush toilet according to claim 1 or claim 2, wherein the stored water portion has a volume ratio of at least 4 or more between the flushing water amount and the stored water so that the stored sewage is sufficiently replaced. A flush toilet design method that determines the shape.

[0038]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, embodiments of a flush toilet of the present invention will be described below. FIG. 1 is an explanatory view showing a longitudinal section of a siphon-jet type toilet bowl 10 according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing an upper surface of the toilet bowl 10. The siphon jet toilet 10 squirts water from a jet outlet 22 to be described later with washing.
It is characterized by causing siphon action early. Hereinafter, each part of the toilet 10 will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the toilet 10 has a ball portion 20 for receiving waste. The peripheral wall of the ball portion 20 has a water contact wall 23 that is in contact with the sealed water FW even when the toilet 10 is not washed,
Dry wall 24 that does not come into contact with sealed water FW when toilet 10 is not washed
It is composed of

As shown in FIG. 2, the jet port 22 is
Zet water supply hole 45 which is an inlet of water from which this hole 22 gushes out
Are connected via a jet water supply channel 46 formed to bend the inside of the toilet. As shown in FIG. 1, the jetting port 22 is provided at a position substantially facing the discharge port 25 with the concave portion 26 interposed therebetween.
It is transmitted to the discharge mechanism after the discharge port 25 without waste. Therefore, it is possible to cause the siphon action earlier.

A mechanism (hereinafter referred to as a supply mechanism) for supplying water to the ball portion 20 is provided inside the toilet 10.
A mechanism (hereinafter, referred to as a discharge mechanism) for discharging water in the ball portion 20 toward the waste pipe is provided.

First, the supply mechanism will be described. Toilet bowl 1
0, a washing water supply hole 40, which is a hole for connecting the drainage port 15a of the washing tank 15, is provided.
Toilet bowl 10 heading from cleaning water supply hole 40 toward ball 20
Is provided with a washing water supply passage 41 which is a flow path of washing water from the washing tank 15.

A large amount of water urged by free fall is supplied from the washing tank 15 to the washing water supply passage 41 at a stretch. Therefore, the stagnant portion 41 a extending obliquely downward from the wash water supply channel 41 becomes full after the start of washing, and the wash water is supplied from the branch hole 42 to the rim water supply channel 43. The cleaning water supplied to the rim water supply passage 43 is discharged from a water discharge hole 44 (see FIG. 2) provided on the back side of the rim 21.

As shown in FIG. 2, on the back side of the rim 21,
7mm diameter large hole 44a, 4mm diameter medium hole 44b, 3mm
There are provided water draining holes 44 having five different shapes: a small hole 44c having a diameter and long holes 44d and 44e having a substantially rectangular shape. The drain hole 44 is formed when the rim 21 is formed.
1 may be mounted on the back side.

Of these, the long holes 44d and 44e are the drain holes 4d.
A swirling component is given to the cleaning water discharged from the fourth cleaning water. That is, the flush water urged in the front direction of the toilet bowl 10 and supplied to the left and right rim water supply passages 43 is distributed in accordance with the opening diameter of the water draining hole 44 and the urging force of the flush water. 44a-e
Is discharged from. At this time, a large amount of water with a large urging force flows from the long hole 44d formed on the back side of the right rear rim 21 near the branch hole 42 toward the drying surface 24 on the slightly left side in front of the toilet. Discharged. Further, washing water flowing clockwise through the rim water supply passage 43 from the long hole 44 e formed at a position slightly to the left of the front of the toilet 10.
A large amount is discharged toward the left rear drying surface 24. The cleaning water discharged from the long holes 44d and 44e becomes the mainstream, and a clockwise turning force is applied to the cleaning water discharged from the water discharging hole 44. This turning force is transmitted to the sealed water FW in the ball portion 20. As a result, the water in the ball portion 20 turns clockwise.

The above is an example of a method of giving a swirl component to the cleaning water discharged from the water discharging hole 44.
Other techniques may be used. For example, the water discharge hole 44 may be formed while forming an angle in the turning direction, or the flow path of the rim water supply channel 43 may be formed on one side.

Further, the washing water that has reached the retaining portion 41a is
Small-diameter jet water supply hole 4 provided on the side wall of stagnation portion 41a
Enter 5. The washing water is supplied to the Z water supply channel 46 in accordance with this approach. The cleaning water supplied to the Z water supply channel 46 is jetted from the Z jet holes 22.

The distribution of the discharge amount from the water discharge hole 44 and the discharge amount from the jet outlet 22 can be arbitrarily set by changing the shape of the branch hole 42 and the jet outlet 22. It is.

The supply mechanism of the toilet 10 has been described above. Next, the discharge mechanism will be described. As shown in FIG. 1, a connection path 31, which is curved obliquely upward from the discharge port 25, as a flow path of sewage, is provided at the end of a discharge port 25 formed in the depth of the concave portion 26 as a waste pool. After extending in the curve direction of the path 31, an ascending path 32 curving in the lateral direction and a descending path 33 curving in the downward direction from the lateral direction are respectively formed. The end of the descending path 33 is connected via a drain socket 70 made of resin to a drain rising pipe 90 provided on the wall or floor on the building side.

As shown in FIG. 1, in this embodiment, the shapes of the connecting passage 31 and the ascending passage 32 for storing the water in the flow passage are changed from the conventional shape in which the connecting passage 31 is wider than the ascending passage 32. Then, the connection path 3
1 has the same shape as the rising path 32. For this reason, the volume of the portion where the pooled water is stored is reduced as compared with the conventional case. By reducing the amount of water retained in the flow path as described above, it is possible to reduce the entire amount of the sealed water FW.

These flow paths are formed integrally with the toilet bowl 10 which is a pottery by shaping the flow path shape into a gypsum mold or a resin mold, but the flow path is formed by a member different from the toilet bowl 10. It is also possible. For example, all or some of these flow paths may be formed of another member such as resin and connected to the outlet 25. In the case of the toilet 10 of the wall drainage specification corresponding to the case where the drainage riser pipe 90 is provided on the wall side of the building, the shape of the end of the descending passage 33 is set so that the drainage direction is directed to the wall. In other words, the end of the descending path 33 may be connected to a bend pipe directed toward the drainage riser pipe 90.

As shown in FIG. 1, in the toilet 10 before the washing operation, the sealed water FW is stored at the height of the normal water level line WL. In the present embodiment, while reducing the amount of the sealed water FW, a wide sealed surface having a value of 185 mm in width × 225 mm in depth is secured. By this water sealing FW, backflow of odor and invasion of pests from the drainage mechanism to the ball portion 20 are prevented.

The sealed water FW accumulates in the ball 20 up to the discharge port 25 (hereinafter, this water is referred to as a ball pool water) and in the connection path 31 and the ascending path 32 after the discharge port 25. It is composed of water (hereinafter, this water is referred to as stored water in a flow path). In the present embodiment, the amounts of the ball portion pool water and the flow channel pool water will be described later.

Note that the height of the normal water level line WL is
2 is determined by the height of the highest position below the inner wall (hereinafter referred to as the highest position in the road). Therefore, as shown in FIG. 1, the lower part of the stagnation portion 41 a of the toilet 10,
And since the Z water supply channel 46 is below the highest position in the channel, the stagnant portion 41
A predetermined amount of water accumulates in the lower part of a and the Z water supply passage 46 (hereinafter, this water is referred to as Z water). If the height of the highest position in the road is reduced, the water level of the sealed water FW is also lowered, and the amounts of the ball portion water, the flow channel water, and the Zet water are also reduced.

A mechanism for discharging sewage and filth by the drainage mechanism configured as described above will be described. When the energized washing water from the washing tank 15 is jetted from the water discharge hole 44 and the jetting hole 22, the water level of the sealed water FW rises rapidly from the normal water level line WL. Further, since the washing water from the jet outlet 22 is jetted toward the connection path 31, the water level in the rising path 32 rises more rapidly.

When the water level of the ascending path 32 rises and a bent portion (hereinafter referred to as a bent portion) from the ascending path 32 to the descending path 33 becomes full, the tip in the descending path 33 and the ball portion of the sealed water are closed. And a pressure difference is generated between them to generate a downward pulling force. By this pulling force, the wastewater located at a position lower than the bent portion is led to the drainage riser pipe 90 at once with the waste. Such an action is called a siphon action.

Next, a description will be given of the amount of water used by the toilet 10 of this embodiment in one washing operation (hereinafter referred to as washing water usage amount). First, the washing tank 15 serving as a supply source of used water will be briefly described. Cleaning tank 15
Is located in the tank tightly closed hole 28 at the rear of the toilet 10.
This is a so-called low tank type tank that is closely connected to the tank. The height of the water level in the tank is adjusted by a float valve mechanism provided in the tank, which opens and closes a valve element closing the drain port 15a according to the position of the float. In the present embodiment, the volume of water stored in the cleaning tank 15 (hereinafter referred to as
The amount of water stored in the tank is about 4 liters, which is smaller than before.

The handle attached to the cleaning tank 15 is configured to be switchable in size. In particular,
When the large cleaning is operated by the handle, about 4 liters of the water stored in the tank is washed, and when the small cleaning is operated, about 3 liters of the water stored in the tank is washed. The water is discharged toward the water supply hole 40. Note that the valve may be opened based on detection of a human body by a sensor instead of operating the steering wheel.

In addition to the water stored in the above-mentioned tank, about 1.8 liters of water for large washing and about 1.1 liters for small washing with one operation of the handle. Four liters of water are discharged toward the wash water supply holes 40, respectively. This water includes so-called “spill water” and the like. The spill water means the cleaning tank 1 when the float valve is opened.
Of the water newly supplied into the tank 5, the water is discharged from the outlet of the washing tank 15 without being accumulated in the tank.

It is to be noted that a certain amount of the water stored in the ball portion, the water stored in the flow path, and the water stored in the jet, which normally stay below the water level line WL, are replaced by the same amount of water as the stored water by one washing. is there. Therefore, in the toilet bowl 10 of the present embodiment, 5.8 liters of water is discharged to the drainage riser pipe 90 by one large flush, and 4.4 liters of water is discharged by one small flush. For this reason, the amount of washing water used is 5.8 liters for large washing and 4.4 liters for small washing.

The toilet 10 of this embodiment employs a configuration in which the amount of the sealed water FW is reduced while using a small amount of washing water as described above.
It has three basic functions, namely, early generation of the siphon action by the washing water from the jet outlet 22. That is,
If the amount of the water in the ball portion, the water in the flow path, and the water in the jet water is reduced, the amount of water to be replaced when the toilet 10 is washed is reduced. Therefore, the reduced water is subtracted from the stored water in the tank. This makes it possible to reduce the amount of washing water used.

In the present embodiment, the amount of pooled water is about 1 liter, the amount of water in the flow path is about 0.45 liter, and the amount of Zet water is about 0.5 liter. Therefore, in the toilet 10, the amount of the above-mentioned ball part pool water, the water in the flow path, and the water stored in the jet is subtracted from the amount of wash water used. One liter of water can be used for cleaning the ball portion 20 and jetting out from the jet outlet 22. As described above, in the toilet 10, a sufficient amount of water is secured for the cleaning of the ball portion 20, the discharge of dirt, and the early generation of the siphon action by the cleaning water from the jet outlet 22.

In this embodiment, the reduction in the amount of the sealed water FW is realized by the shape of the inner surface of the ball portion 20 and the shapes of the connection path 31 and the ascending path 32. First, the shape of the inner surface of the ball portion 20 will be described with reference to FIGS.

FIG. 3 shows the toilet bowl 10 shown in FIG.
It is AA 'sectional drawing which shows the state cut | disconnected from the upper part of the rear end. As shown in FIG. 3, the peripheral wall of the ball portion 20 near the rear end of the concave portion 26 is disposed immediately below the left and right rims 21 from the toilet 1.
It is extended at a gentle inclination toward the center of zero. A gentle bend having a radius of curvature of about 500 mm with the inside of the toilet 10 being the bending center is given to this inclined surface. Thereafter, the peripheral wall is positioned at the first curved portion 53 slightly above the normal water level line WL of the sealed water FW, at the water bottom surface 5 of the toilet 10.
It is bent in the 0 direction. In the sectional position of FIG.
The radius of curvature of the curved portion 53 is about 50 mm.

The peripheral wall bent in this manner extends for a while beyond the normal water level line WL, and then is bent outward again at the fourth curved portion 56 to extend almost directly below the water bottom surface 50. Will be issued. At the cross-sectional position in FIG. 3, a region of the concave portion 26 is formed by the peripheral wall below the fourth curved portion 56 and the water bottom surface 50.

It should be noted that the water bottom surface 5 at the AA 'cross-sectional position
The height from 0 to the normal water level line WL is equal to
W is the maximum value of the height, and in this embodiment, this height is set to about 113 mm (the value of the height up to the upper end of the discharge port 25 is 55 mm
To the normal water level line WL) from the upper end of the discharge port 25), and a water level suitable for a value of 103 mm or more, which is a standard value of Japanese Industrial Standards, is secured. In addition, the value of the height up to the normal water level line WL is determined by raising and lowering the height of the highest position in the ascending road 32.
It can be changed to an appropriate value. For example, in the case of a siphon-type toilet, the sealed FW in Japanese Industrial Standards
The height reference value is set to 88 mm or more, so that the height of the sealed water FW can be further reduced as compared with the toilet 10 of the present embodiment.

Subsequently, a state in which the toilet bowl 10 is cut from above the position of the front end of the concave portion 26 is shown in the sectional view taken along the line BB 'of FIG. As shown in FIG. 4, the peripheral wall of the ball portion 20 near the front end of the concave portion 26 extends at a gentle inclination from below the left and right rims 21 toward the center of the toilet 10.
A gentle bend having a radius of curvature of about 500 mm with the inside of the toilet 10 being the bending center is given to this inclined surface.
Thereafter, the peripheral wall is located at the first curved portion 53 which is located slightly above the normal water level line WL of the sealed water FW, and has a Zet water introduction surface 51.
Bends greatly in the direction. In the sectional position of FIG.
The radius of curvature of the first curved portion 53 is about 30 mm.

The peripheral wall extending in such a bending direction is
Shortly after the normal water line WL, it is largely bent inward at the second bent portion 54. In the sectional position of FIG.
The radius of curvature of the second curved portion 54 is about 20 mm. The peripheral wall bent in this manner extends toward the center of the toilet 10 with a gentle downward inclination. Due to the extension of the peripheral wall, a step portion 58 that straddles the normal water level line WL is formed in the ball portion 20.

In the BB 'cross-sectional position, the second
The position of the curved portion 54 is set to a position about 8 mm below the normal water level line WL on the left side of the toilet, and the normal water level W on the right side of the toilet bowl.
The position is about 13 mm below L. That is, the second music part 5
As shown in FIG. 4, the vertical position of the toilet 4 differs between the left and right sides of the toilet 10, and the right side of the toilet 10 is provided below the left side.

The peripheral wall extending from the second curved portion 54 toward the center of the toilet 10 has a third curved portion 55 slightly above the fourth curved portion 56 described above, and has a length of about 40 m on the left side of the toilet 10.
m, on the right side, is again bent outward with a radius of curvature of about 45 mm, and extends almost directly below the water surface 50. FIG.
In the cross-sectional position of, a region of the concave portion 26 is formed by the peripheral wall below the third curved portion 55 and the water guide surface 51. In the present embodiment, the height from the water guide surface 51 to the normal water level line WL at the cross-sectional position in FIG. 4 is set to a value of about 80 mm.

Next, a state in which the toilet bowl 10 is cut from above a position ahead of the concave portion 26 is shown in a sectional view taken along the line CC 'in FIG. As shown in FIG. 5, the peripheral wall of the ball portion 20 in front of the concave portion 26 extends from below the left and right rims 21 at a gentle inclination toward the center of the toilet 10, as in the case of FIG. 4. . The toilet 10
Are provided with a gentle bend having a radius of curvature of about 500 mm with the inside as a bending center. After that, the peripheral wall is bent in the direction of the concave portion 26 with a radius of curvature of about 30 mm at the above-mentioned first curved portion 53.

The peripheral wall extending in such a bending direction is
As in the case of FIG. 4, shortly after the normal water level line WL, the second bending portion 54 is largely bent inward at a radius of curvature of about 20 mm, and is gradually inclined downward toward the center of the toilet 10. Is extended to Due to the extension of the peripheral wall, a step portion 58 that straddles the normal water level line WL is formed in the ball portion 20. In this way, by positioning the bottom surface of the step portion 58 below the normal water level line WL, a value of 185 mm is secured as the width of the sealed water FW at the BB ′ cross-sectional position. Thereby, adhesion of dirt to the ball portion 20 and emission of odor are prevented.

The vertical position of the second music portion 54 is indicated by BB in FIG.
異 な り Similar to the case of the cross-sectional position, it differs between the left and right
The right side of the toilet 10 is provided below the left side. As shown in FIG. 5, at the CC ′ cross-sectional position,
The position of the second curved portion 54 is set to a position about 7 mm below the normal water line WL on the left side of the toilet 10, and to a position about 13 mm below the normal water line WL on the right side of the toilet 10. That is,
In the vicinity of the front side of the concave portion 26 of the toilet 10 shown as a BB ′ section in FIG. 4 and a CC ′ section in FIG.
FW of 7 mm or more is secured.

Therefore, even when dirt falls onto the step 58, dirt does not adhere to the ball portion 21 and the dirt does not stick to the ball portion 21 during stool. In particular, the vicinity of the front side of the concave portion 26 is an area where the frequency of filth drops is high, and thus is effective.

The bottom surface of the stepped portion 58 formed from the second curved portion 54 to the third curved portion 55 has a width of about 60 mm at the BB 'cross-sectional position in FIG. 'It has a width of about 40 mm at the cross-sectional position. That is, the ball portion 20 is at least connected to the second music portion 5 on the left side of the toilet 10.
4 to 40 mm, and 40 mm from the second curved portion 54 on the right side, projecting toward the toilet center. For this reason, compared with the conventional toilet, the ball portion 20 has a smaller volume, and
This contributes to the reduction of W. Also, the bottom surface of the step 58
Since it is usually positioned below the water level line WL, it is possible to prevent the attachment of dirt to the ball portion 20 and the emission of odor.

In the present embodiment, the amount of the sealed water FW can be reduced by changing the shape of the inside of the ball portion 20 and the shapes of the connection path 31 and the ascending path 32. Of course, other methods are used. May be used. For example, the shape of the ball portion 20 can be changed so that the vertical position of the water bottom surface 50 is raised. Further, the amount of the sealed water FW may be reduced by lowering the normal water level line WL by lowering the highest position in the drainage channel.

The vertical position of the second curved portion 54 at the cross-sectional position along the line CC ′ is similar to that at the position along the line BB ′ in FIG.
The right side of the toilet 10 is different, and the right side of the toilet 10 is provided below the left side. In addition, the vertical position of the second curved portion 54 on the left side of the toilet 10 is 1 mm higher in the cross-sectional position of CC ′ on the front side of the toilet 10 than in the cross-sectional position of BB ′ in FIG. 4 described above. . That is, a slope is provided on the bottom surface of the step 58 from the front on the left side of the toilet to the rear or on the right side of the toilet. In addition, the surface area of the step portion 58 gradually increases as it goes to the left side, the rear side, and the right side of the toilet 10 according to the height difference from the first music portion 53 to the second music portion 54.

On the other hand, as described in FIG. 2, the washing water supplied to the rim water supply passage 43 is supplied to the rim 21 on the right front side.
A large amount of water is discharged from the large hole 44a provided on the back side of the cleaning water, and the discharged cleaning water is provided with kinetic energy in the clockwise direction.

Accordingly, when the cleaning water is discharged from the water discharging hole 44, the cleaning water discharged from the small hole 44c is changed to the cleaning water discharged from the large hole 44a due to the difference in the kinetic energy and the amount of water. Get caught. As a result, a large amount of vigorous washing water is supplied to the left step 58 of the toilet 10, and a strong swirling component is reliably given to the sealed water FW. This washing water
The toilet 10 turns clockwise while being guided by the inclination of the bottom surface of the step portion 53 from the left side to the rear side and the right side of the toilet 10. The waste water is strongly drawn into the discharge port 25 by the washing water to which the turning force is applied. Therefore, it is possible to more reliably discharge waste.

Since the surface area of the step 58 increases toward the right side of the toilet 10, the right step 58 of the toilet 10 can receive more kinetic energy than the left step 58. . Therefore, even if the kinetic performance such as the water level of the washing water gradually increases with the turning, the turning component of the washing water can be transmitted to the turning direction without waste by the step 58 on the right side of the toilet 10.

The peripheral wall extending from the second curved portion 54 toward the center of the toilet 10 is approximately 4
It is bent outward again with a radius of curvature of 0 mm and merges at the bottom surface of the ball portion 20. Note that the height from the bottom surface of the ball portion 20 to the normal water level line WL is approximately 45 mm at the cross-sectional position in FIG.

In the cross-sectional structure shown in FIGS. 3 to 5, the height from the surface of the rim 21 to the normal water level line WL is about 130 mm, which is higher than that of the conventional siphon toilet from the seat surface to the water surface. The distance to is shorter.
In addition, as described above, the height from the jet water guide surface 51 to the normal water level line WL at the BB ′ cross-sectional position in FIG. 4 is about 80 mm, and the ball portion 20 at the CC ′ cross-sectional position in FIG. The height from the bottom to the normal water line WL is about 45
mm, and the water depth is set shallower than the conventional siphon toilet. For this reason, the filth dropped in the stool reaches the sealing surface with a small speed component, and the distance over which the filth moves in the sealing is also reduced. Therefore, it is possible to reduce the rebound of the sealed water immediately after the stool.

As described above, in the vicinity of the front side of the concave portion 26, the sealing water FW is accumulated at a height of 7 mm to 13 mm from the stepped portion 58, and when the dirt reaches the sealing surface, the dirt is removed. The distance traveled within the water seal is even shorter. Thus, in the toilet 10 of the present embodiment, the shallow water sealing FW is formed over a wide area where the waste may fall. Therefore, the falling position of the water sealing surface dirt is
Even if it shakes from the center in the left-right direction, it is possible to prevent the water from splashing back.

In the above embodiment, the cross-sectional shapes of the connection path 31 and the ascending path 32 may be configured as follows. This configuration is shown in FIGS. FIG. 6 shows the cross-sectional shapes of the connection path 31 and the ascending path 32. FIG. 7 shows a vertical cross-sectional shape of the connection path 31 and the ascending path 32, and FIG. 7A shows a cross section taken along the line PP ′, a line QQ ′, and a line RR ′ of FIG.

As shown in FIGS. 6 and 7A, the start end 31a and the end 31b of the connection path 31, and the start end 31a and the intermediate part 32b of the ascending path 32 have the same cross section. This cross section has a non-circular and vertically asymmetric shape with a semicircular shape on the lower side and a rectangular shape on the upper side. This shape is the same in the bent portion between the intermediate portion 32b and the terminal end 32c shown in FIG. 6, and the upper outer bent portion is formed in a rectangular shape, and the lower inner bent portion is formed in a semicircular shape. I have.

That is, the connection path 31 is formed to have the same cross-sectional area from the start end 31a to the end 31b.
From the start end 32a to the end before the end 32c, the connection path 3
1 is formed with the same cross-sectional area.

On the other hand, the cross section near the terminal end 32c of the ascending path 32 is formed in a shape different from the cross section of the ascending path 32 in other portions. This cross-sectional shape is shown in FIG. As shown in FIG. 7B, the end 32 of the rising path 32
The cross section of c is circular.

Here, in the cross section from the starting end 31a of the connection path 31 to just before the end 32c of the ascending path 32 shown in FIG. 7A, the radius r from the center O1 of the lower semicircle is shown.
The value of 1 is about 27.5 mm. Therefore, the length of the long side x1 of the upper rectangle is about 55 mm. Also,
The length of the short side x2 of the upper rectangle is 27.5 mm, which is the same as the value of the radius r1. On the other hand, in the cross section of the terminal end 32c of the ascending path 32 shown in FIG. 7B, the value of the radius r2 from the center O2 of the lower semicircle is about 27.5 mm. Accordingly, the cross section from the starting end 31a of the connection path 31 to a position just before the end 32c of the rising path 32 and the rising path 32
Has substantially the same cross-sectional area as the cross-section near the end 32c.

The manner in which the washing water and the dirt flow through the connection path 31 and the ascending path 32 thus formed will be described with reference to FIGS. FIG. 8 shows a cross section of the toilet 10 when the bent portion between the ascending path 32 and the descending path 33 becomes full and the siphon action starts to occur. As shown in FIG. 8, when the cleaning water is discharged from the water discharging hole 44, the level of the cleaning water in the ball portion 20 becomes the maximum water level line WL0.
Reach Thereafter, when the water level drops to the first water level line WL1, a siphon action occurs almost simultaneously. Due to the occurrence of the siphon action, the water filled in the ascending path 32 and the connecting path 31 is drawn in the direction of the highest position in the path. Due to the drawing force, the filth OB collected near the water bottom surface 50 of the discharge port 25 moves in the direction of the rising path 32 (direction of the arrow K1) where the drawing force is generated. In addition, the inside diameter of the flow path at the start end 31a of the connection path 31 is 55 mm, and the dirt can sufficiently flow.

FIG. 9 shows the state when the waste OB moves in the direction of arrow K1. In FIG. 9, the waste OB is moving from near the start 31a of the connection path 31 to near the end 31b. Since the cross-sectional area of the flow path is the same from the start end 31a to the end 31b, the washing water is not accelerated due to the difference in the flow path area. Therefore, the pressure loss of the water is smaller than in the case of acceleration.

Since the thickness is the same from the start end 31a to the end 31b, the washing water flows while suppressing the generation of turbulence.
As in the conventional case, when the thickness of the pipe is gradually reduced, the flow directions of the wash water intersect in the middle of the pipe, and the wash water overlaps with each other in a complicated manner. As a result, turbulence does not easily occur between the start end 31a and the end 31b. Therefore, the waste OB smoothly moves to the vicinity of the terminal end 31b according to the flow direction of the washing water.

Further, when the siphon action proceeds, the waste OB
Moves toward the highest position in the ascending road 32 and moves in the direction of arrow K2. The state after this movement is shown in FIG. FIG.
In, the waste OB is moving from near the end 31b of the connection path 31 to near the end 32c of the ascending path 32. From the end 31b to just before the end 32c, the cross-sectional area of the flow path is also the same, so that the waste OB is smoothly moved to the vicinity of the end 32c in accordance with the flow direction of the washing water, as in the case of the movement in the direction of arrow K1. Move up to. After this, waste OB
Is drawn in the direction of the arrow K3, enters the descending path 33, and descends in the descending path 33.

As described above, if the cross section from the start end 31a to the end 31b of the connection path 31 and the cross section from the start end 32a to the end before the end 32c of the ascending path 32 are formed to have substantially the same cross-sectional area, the ball portion Connection line 3 with washing of 20
1, the speed of water passing through the ascending path 32 in sequence
There is no significant change when the direction is changed from the horizontal direction to the obliquely upward direction from 1 to the ascending road 32 or when the ascending road 32 is ascended toward the highest position in the road. Therefore, the pressure loss of the water in the connection path 31 and the ascending path 32 is suppressed to be small, and the occurrence of turbulence is also suppressed. As a result, it becomes possible to stably generate the siphon action even if only a small amount of water is used, and the dirt accumulated in the ball portion 20 can be reliably drawn into the descending path 33.

The toilet 1 according to the embodiment of the present invention described above.
According to No. 0, at the ball portion 20, a stepped portion is formed on the left and right peripheral walls from the second curved portion 54 to the third curved portion 55 of the ball portion 20 while securing water sealing at a high water level of about 113 mm from the water bottom surface 50. Is formed, and the amount of the water in the ball portion is reduced to about 1 liter. While keeping the height of the sealed water FW high,
Since the amount of the water stored in the ball portion is reduced, it is possible to reduce the amount of washing water used while ensuring stable generation of the siphon action.

In this embodiment, the step 58 is formed so as to have a width of about 40 mm even at the shortest bottom surface. Therefore, the peripheral wall of the ball portion 20 projects from the left and right second curved portions 54 toward the center of the toilet bowl by this width.
Therefore, since the volume of the ball portion 20 can be greatly reduced, the amount of replacement water at the time of cleaning can be significantly reduced.

Further, in this embodiment, at the height of the normal water level line WL of the sealed water FW, a width of 185 mm × a depth of 225 mm
A wide sealing surface with a value of mm is secured. Therefore, it is possible to more effectively prevent sticking of dirt to the ball portion 20 and odor emission from the dry surface 24. In addition, since the bottom surface of the step portion 58 is located below the normal water line WL, it is possible to prevent the sticking of dirt more than the conventional siphon toilet.

In the present embodiment, not only the water in the ball portion but also
Depending on the shape of the connection path 31 and the ascending path 32, the amount of stored water in the flow path and the amount of stored ZET are also reduced, so that it is possible to further reduce the amount of washing water used. As a result, in this embodiment, the amount of washing water used is reduced to 5.8 liters for one large flush and to 4.4 liters for one small flush, thus providing a toilet with a high water saving effect. It becomes possible.

In the toilet 10 of this embodiment, the bottoms of the left and right steps 58 are provided at different heights, so that the steps 58 are provided.
On the bottom of the toilet, a slope is formed from the front of the left side of the toilet to the rear or the right side of the toilet, and the drain hole 4 is formed along the slope.
The cleaning water discharged from 4 is guided to reliably apply a strong clockwise turning force to the cleaning water. Therefore, the waste water is strongly drawn into the discharge port 25 by the washing water to which the turning force is applied. Therefore, it is possible to more reliably discharge the waste when the amount of the water in the ball portion is small.

In the above-described embodiment, the amount of reservoir water in the ball portion is about 1 liter. According to experiments, this value is at least 0.7 liter and not more than 1.2 liter. It has been confirmed that there is no problem in cleaning the ball portion 20 and ZET cleaning if present. When the amount of the water in the ball portion is less than 1.2 liters, it is possible to save water more than the conventional toilet.

In this embodiment, the amount of water retained in the flow channel is set to about 0.45 liter. According to experiments, this value is at least 0.4 liter to 0.6 liter. If so, it has been confirmed that there is no problem in cleaning the ball portion 20 and jet cleaning. When the amount of water retained in the flow passage is less than 0.6 liter, it becomes possible to save water more than a conventional toilet.

Further, in this embodiment, the amount of the Zent water is set to a value of about 0.5 liter. However, according to experiments, this value should be at least 0.3 liter to 0.6 liter. For example, it has been confirmed that there is no problem in cleaning the ball portion 20 and jet cleaning. When the amount of the water stored in the water is less than 0.6 liter, it is possible to save water more than the conventional toilet. In addition, as the structure in which the Z water supply channel 46 is formed at a position higher than the normal water level line WL of the sealed water FW, the Z water reservoir itself may be eliminated.

Further, in the present embodiment, the amount of washing water used is 5.8 liters for large washing, but this value may be 4 liters or more and 7 liters or less. If the value is 7 liters or less, it is possible to save water more than a conventional toilet.

Also, a pump is connected to this washing tank,
When the water pressurized by the pump is supplied to the toilet, it is possible to reduce the amount of used washing water to about 3 liters in large washing. In addition, when the flush water supply channel 41 is connected to a water pipe and the pressure of the water supplied to the toilet is increased by the tap water pressure, the amount of flush water used can be reduced to about 3 liters in large flush. is there.

The cleaning performance of the toilet 10 of this embodiment described above was evaluated as follows. In general, the cleaning ability can be evaluated in terms of how much the sewage in the reservoir is replaced by flowing the cleaning water stored in the cleaning tank. This is because if the stored water contaminated by the filth is not replaced by a certain amount or more, coloring of the sewage derived from the sewage is visually recognized. This percentage was 98.5 percent from experiments based on various toilets. That is, 98.
If 5 percent is replaced, the color of the sewage water from the sewage will not be visible.

Then, using the above-mentioned toilet bowl 10, a test was conducted to determine the ratio of the flush water to the accumulated water to cause the accumulated water to be replaced. The result is shown in FIG. The test was performed by dissolving the electrolyte in the stored water stored in the ball portion, pouring clean washing water, and measuring the change in electric conductivity, thereby measuring the replacement ratio of the stored water.
In FIG. 11, the concentration ratio on the vertical axis indicates the ratio of the electric conductivity after washing to the electric conductivity of the stored water before washing, and the point where the concentration ratio is 0.015 is the substitution rate of 98. This is equivalent to 5%. The horizontal axis indicates the ratio between the amount of washing water and the amount of stored water, and the larger this value is, the larger the amount of washing water is relative to the amount of stored water.

As shown in the figure, in order for the concentration ratio to be 0.015 or less, that is, the substitution rate to be 98.5% or more, it was found that the amount of washing water / the amount of stored water needs to be 4.2 or more. Therefore, when the amount of stored water is 0.7 to 1.6 liters, the amount of washing water is required to be 3 to 7 liters. Conversely, when the capacity of the washing tank is 4.5 liters, the amount of stored water is 1.07 liters or less, and when the capacity of the washing tank is 4.0 liters, the amount of stored water is 0.95 liters or less. Becomes

In the above, the embodiment of the present invention has been described by taking the siphon jet type toilet 10 as an example. The present invention is not limited to such embodiments at all, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.

For example, the present invention can be applied to a toilet that does not eject flush water from the jet hole, such as a siphon toilet or a siphon vortex toilet. These toilets also have a bent portion formed by an ascending path and a descending path, similarly to the siphon jet type toilet, and a siphon effect is generated by making the bent portion full. Therefore, by making the cross-sectional area of the drain pipe rising toward the bent portion uniform, the siphon action can be reliably realized with a small amount of water.

Further, the present invention can be applied to a flush toilet that does not use the pull-in force of the siphon action. That is, in the toilet bowl,
Similar to the siphon type toilet, an uphill is provided, and the water sealing height is determined by the height below the inner wall of the pipeline at the highest position. Therefore, even in the flush toilet, the sealed water is stored in the ball portion and the rising path.

For this reason, if the cross-sectional area at the entrance of the ascending channel is made the same as that at the outlet of the ascending pipe, the speed of water in the ascending channel can be suppressed, so that the dirt in the ascending channel is strong. Can be pumped by force. Therefore, the waste does not return without passing over the weir near the outlet of the riser. In particular, when the toilet is washed with the water stored in the washing tank 15, even if the washing tank 15 is not sufficiently filled with water, it is possible to surely flush the waste. Therefore, the waste can be flown with a small amount of water, and there is no waste of water caused by the flow twice.

Further, if the shapes of the ball portion 20, the connection path 31, and the rising path 32 in the toilet 10 of the present embodiment are adopted for the flush toilet, the amount of the sealed water FW of the flush toilet can be reduced by the ball in the above-described embodiment. It is possible to make the amount of the partial water and the amount of the water in the flow path approximately 1.45 liters, and to make this value a smaller value up to 1.1 liters, which is the confirmed value by the above-mentioned experiment. Is also possible.

In the above embodiment, the size of the sealing surface was set to a value of 185 mm in width and 225 mm in depth. However, this value was used as a reference value for the area of the sealing surface of the siphon toilet set in the Japanese Industrial Standards. If the width is 140 mm or more and the depth is 180 mm or more, it is possible to prevent the attachment of dirt to the bowl and the emission of odor from the bowl as well as a siphon toilet.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a longitudinal section of a siphon-jet type toilet bowl 10 according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the upper surface of the toilet bowl 10.

FIG. 3 is an explanatory view showing a state where the toilet bowl 10 shown in FIG. 2 is cut at a position AA ′.

4 is an explanatory diagram showing a state where the toilet bowl 10 shown in FIG. 2 is cut at a position BB ′.

FIG. 5 is an explanatory diagram showing a state where the toilet bowl 10 shown in FIG. 2 is cut at a position CC ′.

FIG. 6 is an explanatory diagram showing a cross-sectional shape of a connection path 31 and an ascending path 32 of the toilet 10;

FIG. 7A is an explanatory diagram showing a state in which a connection path 31 and an ascending path 32 are cut at positions PP ′, QQ ′, and RR ′. (B) shows the uphill road 32,
It is explanatory drawing which shows the state cut | disconnected in the position SS '.

FIG. 8: The toilet 1 when the bent portion between the ascending path 32 and the descending path 33 becomes full and the siphon action starts to occur.
It is explanatory drawing which shows the cross section of 0.

FIG. 9 is an explanatory diagram showing a state when the waste OB moves in the direction of arrow K1.

FIG. 10 is an explanatory diagram showing a state when the waste OB moves in a direction of an arrow K2.

FIG. 11 is a graph showing the relationship between the degree of replacement of the stored water portion in the toilet and the estimated amount of cleaning / the amount of stored water.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Toilet bowl 15 ... Wash tank 15a ... Drain port 20 ... Ball part 21 ... Rim 22 ... Zet ejection hole 23 ... Water surface 24 ... Dry surface 25 ... Drain port 26 ... Recess 28 ... Tank tight connection hole 29 ... Toilet seat mounting hole DESCRIPTION OF SYMBOLS 31 ... Connection path 31a ... Start end 31b ... Termination 32 ... Ascending path 32a ... Start end 32b ... Intermediate part 32c ... Termination 33 ... Downside path 40 ... Wash water supply hole 41 ... Wash water supply path 41a ... Staying part 42 ... Branch hole 43 ... Rim water supply passage 44 ... Water discharge hole 44a ... Large hole 44b ... Medium hole 44c ... Small hole 44d ... Long hole 44e ... Long hole 45 ... Zet water supply hole 46 ... Zet water supply channel 50 ... Water bottom surface 51 ... Zet water supply surface 53 ... No. 1 music part 54 ... second music part 55 ... third music part 56 ... fourth music part 58 ... step part 70 ... drain socket 90 ... drain riser FW ... sealing WL ... normal water level line WL0 ... high water level line WL1 … 1 water line WL2 ... second water line WL3 ... third waterline

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Noboru Niihara 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Touchi Kiki Co., Ltd. (72) Koichi Miyagami 2 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka No. 1-1, Totoki Kiki Co., Ltd. (72) Shinji Shibata, Inventor 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture Tochiki Kiki Co., Ltd. (72) Inventor, Masaki Kitamura Kitakyushu, Fukuoka No. 2-1-1 Nakajima, Kokurakita-ku Totoki Equipment Co., Ltd. (72) Inventor Shinsuke Matsuo 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka F-term (reference) 2D039 AA02 AC03 AC04 AD00 DA04 DB04

Claims (11)

[Claims] 1. A bowl for receiving waste, a connection path connected to a discharge port formed at the bottom of the bowl, and an ascending path communicating with the connection path and extending upward from the communication position. A water seal is formed by the pooled water stored in the bowl, the connection path, and the rising path, and the connection, which is a flow path from the discharge port, along with the supply of the wash water to the bowl. A flush toilet that feeds water into a channel and the ascending channel and guides water and dirt passing through the ascending channel to a lower position where a drain pipe is located; The amount of stored water at the time of formation is 1.1 liters or more and 1.4
A flush toilet having a shape of not more than 5 liters, wherein a vertical height of the sealed water from a bowl surface, which is a position where filth falls, to a surface of the stored water, is at least 85 mm or more. 2. A bowl for receiving filth, a connection path connected to a discharge port formed at the bottom of the pot, and an ascending path communicating with the connection path and extending upward from the communication position. And a descending path, which is continuous with the ascending path and extends downward from the end of the ascending path, where the drain pipe is located, wherein the water stored in the bowl, the connecting path, and the ascending path is provided. Forming a water seal at a height corresponding to the height of the ascending path, and supplying water to the connection path and the ascending path, which are flow paths, from the discharge port with the supply of the washing water to the bowl portion. A siphon-type flush toilet that guides the water and dirt from the ascending path to the descending path by using a siphon effect generated by feeding and sending the water. And the amount of water stored in the bowl is 0.7 liters or more and 1.2 liters or less. That shape and then, mainly vertical height from the bowl surface a position of the seal water to the water surface of the reservoir water waste falling siphonic the flush toilet bowl which a value of more than at least 85 millimeters. 3. The flush toilet according to claim 1, wherein a step portion having a shallow water depth is provided on an inner wall of the pot portion except for a substantially central portion of the pot portion. 4. The step portion is provided with a length of 40 mm or more from the left inner wall toward the center of the pot and a length of 40 mm or more from the right inner wall toward the center of the pot. Item 7. A flush toilet according to Item 3. 5. The size of the water surface of the water stored in the pot portion among the stored water forming the sealed water is set to a depth of 180.
The flush toilet according to any one of claims 1 to 4, wherein the value is not less than millimeter and width is not less than 140 mm. 6. The flush toilet according to claim 5, wherein a size of a water surface of the water stored in the bowl portion is a value of not less than 225 mm in depth and not less than 185 mm in width. 7. An amount of water stored in the connection path and the ascending path of the stored water forming the sealing water is set to 0.1.
2. The value of not less than 4 liters and not more than 0.6 liters.
Or the flush toilet according to 2. 8. The flush toilet according to claim 7, wherein an inner diameter from the connection path to the ascending path in a portion where the stored water is stored is substantially the same. 9. The siphon type flush toilet according to claim 2, further comprising: a jet ejecting mechanism for ejecting washing water supplied to the toilet toward the discharge port, wherein the jet ejecting mechanism comprises A water conduit for guiding the washed water to the discharge port, a mechanism provided at a position below the water sealing, of the water stored in the water conduit among the stored water forming the water sealing. The flush toilet according to claim 2 or 6, wherein the amount is 0.6 liter or less. 10. The flush toilet according to claim 1, wherein an amount of flush water discharged per flush operation is set to a value of 3 liters to 7 liters. 11. The flush toilet according to claim 1, wherein the inner wall of the bowl has an asymmetric shape with respect to a longitudinal axis of the toilet.