JP2003232066A - Toilet stool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toilet stool which is improved in ease of operation and excellent in operability in a toilet space. <P>SOLUTION: According to the toilet stool, a washing water tank 100 is shaped like the ell in plan view, and consists of a rear tank portion 102 placed on the rear of a toilet stool main body 11 and a side tank portion 104 placed on a laterally side portion of the same, wherein inner areas of the respective tank portions communicate with each other. Then, the side tank portion 104 has a drain valve device arranged therein, which opens/closes a drain port formed in a tank bottom surface of the side tank portion 104 to feed washing water to a toilet stool bowl portion, and a cover body 106 has a press button 142 for feeding large volume of washing water and a press button 144 for feeding small volume of washing water. Further, a link mechanism is provided for both the push buttons and the drain valve device at a location between the push buttons and the drain valve device, for converting button-pressing operation into a valve-opening operation. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet bowl for cleaning toilet bowl balls by receiving cleaning water supplied from a cleaning water tank for storing cleaning water, and particularly, the toilet body and the cleaning water tank are integrally or tightly connected to each other. It is related to the toilet bowl of the sitting type.

[0002]

2. Description of the Related Art In this type of toilet bowl, it has been common to install a flush water storage tank behind the user sitting on the toilet bowl. Also, regarding the shape of the storage tank, it has been common to have a somewhat large depth in the front-back direction of the toilet from various demands. For example, it is necessary to store a predetermined amount of wash water inside the tank, and to store a tank internal mechanism such as a water supply valve and a drain valve for storing and discharging the wash water. For this reason, a certain large space volume is required in the tank, so that the depth in the front-rear direction of the toilet has increased as described above. Explaining with concrete values, the storage tank provided in the toilet that uses 6 liters of cleaning water for cleaning the toilet has an external shape of about 160
~ 200mm or more in depth, tank height is about 200
About 400 mm was necessary.

[0003]

In the toilet bowl having such a storage tank, the tank is arranged behind the toilet bowl portion in which the toilet seat is installed. Therefore, the overall length (depth) of the toilet bowl is different from those of the toilet seat / storage tank. It is roughly defined by the shape. As for the toilet seat, a toilet seat with the largest possible opening (a so-called Elongate type toilet seat) is preferred in terms of convenience of use. Therefore, it is necessary to secure about 470 mm from the front end of the toilet bowl to the rear toilet seat mounting hole. At this time, considering the attachment of the warm water flush toilet seat, a depth space of 70 mm or more is required between the toilet seat attachment hole and the storage tank as a mounting space for the functional portion of the hot water flush toilet seat. Therefore, when the storage tank described above is provided in the rear part, the total length of the toilet bowl is at least about 700 mm or more.

Further, when considering a low profile toilet bowl having a low storage tank height and a good design,
In order to secure the internal volume, the tank depth must be made larger. However, when considering to install a toilet bowl in a toilet booth, it is rare that the occupied space occupies a large part of the living space, and most of them have a depth of 1100-1.
It is a space of 400 mm and a width of 800 to 1300 mm. Generally, a space of at least 400 to 500 mm or more is required in front of the toilet in order to smoothly perform actions such as excretion. Therefore, in the toilet space having the above specifications, the total length of the toilet is preferably 700 mm or less. However,
As described above, when the design is emphasized, it is difficult to set the total length of the toilet bowl to 700 mm or less because the depth of the storage tank is large.

The present invention has been made to solve the above problems, and does not hinder the improvement of the design by keeping the total height of the toilet bowl and the height of the storage tank low, and the mounting of the warm water washing toilet seat of the elongate size. It is an object of the present invention to provide a toilet bowl that shortens the overall length of the toilet bowl.

Further, the following is also being demanded. The drain valve for the wash water from the storage tank is opened by operating the operating portion, which is generally located on the side wall of the tank.
In a low profile toilet, the tank height of the storage tank itself may be low, so the above-mentioned operation portion tends to be located at a low position behind the toilet. Therefore, it is pointed out that it is difficult to use because it is hidden by the valve lid opened upward when using the toilet, and the operating part becomes unusable unless the user bends down to operate the operating part. Has reached. It is an object of the present invention to solve these problems and to provide a low profile toilet bowl that can favorably operate the operation unit.

[0007]

In order to solve at least a part of the above problems, the toilet bowl of the present invention receives the flush water supply from the flush water tank for storing flush water in the bowl bowl portion. A toilet tank for cleaning the toilet bowl portion, wherein the cleaning water tank is a storage tank for storing the cleaning water, and a rear tank portion is located at a rear upper portion of the toilet body having the toilet bowl portion, A side tank portion extending from the end of the rear tank portion toward the front side of the toilet body is connected and provided, and a tank bottom surface is provided inside the tank portion of the rear tank portion or the side tank portion. Has a drainage valve device for opening and closing the drainage port to supply flush water toward the toilet bowl part, and has an operation part for opening the drainage valve device on the upper surface or the side surface of the side tank part. Characterized by .

In the toilet bowl of the present invention having the above structure, the side tank portion on the side of the toilet body is also used as the flush water storage site in addition to the rear tank portion at the rear of the toilet body. Therefore, since flush water can be stored on the side of the toilet bowl, the volume of the rear tank portion can be reduced accordingly, and the thickness (depth) of the rear tank portion can be narrowed and the toilet bowl can be extended. The overall length can be shortened.

Further, since the operation portion is located in the side tank portion on the side of the toilet body, it is not blocked by the toilet lid.
Easy to see. Therefore, the operability is improved. in addition,
If it is an operation part installed on the upper surface of the side tank part, the user sitting on the toilet bowl can see this operation part without twisting the body, so the user can operate the operation part when standing up from the sitting posture. Can be operated to clean the toilet bowl. In addition, the side tank part can be used as a clue (handrail) when the user sits on or leaves the toilet bowl, and can also be used as an armrest during use, so that when using the toilet bowl more The convenience of can be improved.

In the toilet bowl having such a structure, the drainage valve device for supplying the wash water from the storage portion to the toilet bowl portion is provided inside the storage portion. In this case, if the drain valve device is provided in the rear tank part, a link mechanism such as a wire is provided between the operation part and the drain valve device, and the operating force applied by the operation part is transmitted to the drain valve device for drainage. It can be a driving force for opening the valve.

On the other hand, when the drain valve device is arranged in the side tank portion, the following advantages are particularly preferable. That is, since the drain valve mechanism and the operating portion can be arranged in the side tank portion in a vertical positional relationship, the operation operation of the operating portion may be transmitted to the drain opening / closing operation on the bottom surface of the tank thereunder. It does not require horizontal support for the extended shaft.
Therefore, the configuration of motion transmission can be simplified accordingly.

Further, the drain valve device preferably has a large opening area in order to vigorously supply the flush water stored in the storage portion to the bowl portion of the bowl, generally φ40 to φ6.
It has an opening of about 0 mm. Therefore, a space for installing the drainage valve device needs to be about φ80 to 100 mm. If such space is secured in the rear tank part, a depth greater than this dimension is required in the rear tank part, but if secured in the side tank part, the depth of the rear tank part can be narrowed and the total length of the toilet bowl It is beneficial to shorten the length of.

Further, the side tanks have the following advantages. In the toilet bowl of the present invention, in addition to the rear tank portion at the rear of the toilet body, the side tank portion on the side of the toilet body is also used as the flush water storage portion, so that the bottom area of this storage portion can be widened. Therefore, in the toilet bowl where the total amount of wash water is specified, the stored water level of the wash water (water level in the tank) is increased by the expansion of the bottom area.
Since the height can be lowered, a low silhouette of the entire toilet bowl including the tank can be achieved. For this reason, designability is also enhanced. At the same time, since the water level in the tank can be lowered in this way, the head pressure in the tank becomes small. Therefore, even if the drainage port on the bottom of the tank is widened to increase the area of the valve body of the drainage valve device that opens and closes the drainage port, the force required to open the valve body (operating portion operating force) can be reduced. . Therefore, operability and drainage capacity can be maintained. If a certain amount of water head pressure is required by the toilet bowl, the tank water level can be increased and the tank height can be increased so that the water head pressure can be obtained.

In this toilet bowl of the present invention, it is not necessary to provide the side tank portion on one side of the toilet body (on the left side or on the right side). You can also do it.

The toilet bowl of the present invention having the above structure can also take the following modes. That is, the flush water tank may be integrated with the toilet body by placing the rear tank portion on the rear side of the upper surface of the toilet body. This facilitates handling.

Further, the tank portion on the side on which the drain valve device is not disposed has a tank bottom inclined toward the connecting portion with the tank portion on the side on which the drain valve device is disposed, and above that. Then, the tank portion on the side where the drainage valve device is disposed may have a tank bottom surface that is inclined toward the location where the drainage valve device is disposed. With this configuration, when the cleaning water in the tank is drained, the cleaning water can be prevented from remaining on the bottom surface of the tank other than the location where the drain valve device is installed, in the rear tank portion and the side tank portion.

Further, if the side tank is provided with the operating portion on the front side of the toilet bowl, the operating portion comes closer to the user in front of the toilet bowl, and the visibility of the operating portion to the user sitting on the toilet bowl is improved. Increase. Therefore, the operability can be further improved.

In order to solve at least a part of the above-mentioned problems, another toilet bowl of the present invention receives flush water supply from a flush water tank for storing flush water in the bowl bowl portion and flushes the bowl bowl portion. In the toilet bowl, the flush water tank is a storage tank for storing the flush water. And a drain valve device for opening and closing a drain port on the bottom of the tank to supply flush water toward the toilet bowl part, and an operation part for opening the drain valve device inside the rear tank part. However, the operating portion is disposed on the upper surface of the rear tank portion so as to be deviated laterally from the center of the toilet body.

In another toilet bowl of the present invention having the above structure,
On the side of the center of the toilet body, the operation part was laterally offset on the upper surface of the tank. Therefore, the visibility of the operation unit for the user sitting on the toilet bowl is also enhanced, and the operability can be improved. In addition, if the drain valve mechanism is laterally offset along with the operating part, the drain valve mechanism and the operating part can be arranged in a vertical positional relationship on the side of the toilet body, so that the operating operation of the operating part Need only be transmitted to the opening / closing operation of the drain port on the bottom surface of the tank therebelow, and horizontal support of the shaft is not required.
Therefore, the configuration of motion transmission can be simplified accordingly.

Further, the operating portion is located on the upper surface of the rear tank portion on the side of the toilet body, and faces the user who is in front of the toilet bowl so that it is easily visible. Moreover, the operation part is not blocked by the toilet lid. Therefore, the operability of the operation unit is improved.

Further, in the flush water tank, not only the portion corresponding to the rear of the toilet body but also the portion extending to the side of the toilet body are used as the flush water storage area in the flush water tank. Can be widened. Therefore, as described above, the depth of the tank can be reduced, and a low silhouette of the entire toilet bowl including the tank can be achieved, which improves the design.
In addition, it is possible to maintain operability and drainage capacity by reducing the head pressure. Furthermore, when making the rear tank part wider than the toilet body, it is not necessary to expand it to only one side of the toilet body (one of the left side and the right side), but to the left and right sides of the toilet body. You can also do it.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described based on examples. FIG. 1 is a schematic perspective view showing a toilet bowl 10 of an embodiment, FIG. 2 is a front view showing a front portion of the toilet bowl 10 partially broken away, and FIG. 3 is a side view showing a side surface of the toilet bowl 10 being partially broken away. FIG. 4 shows a flush water tank 1 of this toilet bowl 10.
It is explanatory drawing for demonstrating the appearance of the bottom face of 00.

As shown in these drawings, the toilet bowl 10 is
A toilet bowl main body 11 having a toilet bowl portion 12 to be described later is provided, and a flush water tank 100 is provided at the rear of the main body. The toilet body 11 and the flush water tank 100 are both made of pottery, and are integrally formed so that the flush water tank 100 rides on the upper surface of the toilet body 11. A toilet seat 11a and a toilet lid 11b are openably and closably attached to the rim 14 at the upper edge of the toilet body 11.

The flush water tank 100 has a substantially L-shaped outer shape in a plan view, and includes a rear tank portion 102 located behind the toilet body 11 and a side tank portion 104 located laterally of the toilet bowl. The upper end of each tank is closed by a lid 106. The rear tank portion 102 and the side tank portion 104 are connected and formed so that the inner regions thereof are continuous. The flush water tank 100 is a full tank which is slightly larger than the total flush water amount in the rear tank portion 102 and the side tank portion 104 in order to be applied to a toilet bowl having a total flush water amount of about 5.5 liters in case of stool. Store an amount of washing water (for example, about 5.6 liters). That is, the flush water tank 100 discharges approximately 5.5 liters of the flush water in the tank out of the amount of the flush water (approximately 5.6 liters) at the time of stool, and after flushing the toilet bowl, flushes approximately 5.5 liters of this flush water. It is replenished by a cleaning water replenishing mechanism such as a ball tap (not shown). In the present embodiment, the bottom surface area of the rear tank section 102 is set to about 360 cm ² (about 9x40) and the side tank section 104 is set to about 180 cm ² (about 9x20), so that the tank water amount (about 5.6 liters) is The full water level when stored is approximately 12.5 cm. However, the tank height from the upper surface of the toilet body 11 is set to about 20 cm including the lid in consideration of the margin for preventing the scattering of washing water from the full water level and the convenience of assembling the drain valve described later. . This tank height is
It is 1/2 to 1/3 of the existing toilet bowl with tank. As described above, since the flush water tank 100 can be lowered, it is possible to reduce the silhouette of the entire toilet bowl including this tank and improve the design. At this time, since the depth of the rear tank part is 90 mm on the inner surface, the outer shape of the tank is about 110 mm, and the total length of the toilet bowl is 650 mm, which is compact, and it is possible to obtain a toilet bowl of a size that can sufficiently operate even in a small toilet space.

As shown in FIG. 2, the bottom wall 103 of the rear tank portion 102 is inclined toward the side of the connecting portion with the side tank portion 104. In the side tank portion 104, the bottom wall 105 is inclined toward the drain valve arrangement portion 107 on the front side of the toilet bowl. That is, as shown in FIG. 4, the bottom wall 103 inclines from the rear tank section 102 to the side tank section 104 as indicated by the inclination symbol 103 a in the figure, and the side tank section 104 inclines in the figure. The bottom wall 105 is inclined like the symbol 105a. Therefore, at the end of discharge when the above-mentioned assumed amount of cleaning water (about 5.5 liters) is discharged, the cleaning water in the rear tank part 102 flows to the side tank part 104 side, and the drain water in the side tank part 104 drains. It flows to the valve arrangement portion 107 side. As a result, the bottom wall 103 of the rear tank section 102, which is separated from the drain valve installation section 107,
In particular, the cleaning water can be prevented from remaining on the bottom surface portion on the left side of the rear tank portion 102 in FIG.

The drainage valve arranging portion 107 is provided in the side tank portion 10
4 is located on the front side, that is, on the front side of the toilet body 11, and the drain valve installation portion 107 is provided with a drain valve device 110 described later. Further, at the upper part of the drainage valve installation portion 107, a large cleaning push button 142 described later is provided on the lid body 106.
And a small cleaning push button 144 are provided. These push buttons are located above the drain valve device 110, and the drain valve device 110 is opened by operating each button as described later.

The large washing push button 142 and the small washing push button 144 are arranged on the side tank portion 104 located on the side of the toilet body 11. Therefore, even when the toilet lid 11b or the toilet lid and the toilet seat 11a are opened, these push buttons are not blocked by the toilet lid or the valve seat.
Moreover, since each of the push buttons is on the lid 106 of the side tank portion 104, it is easy to be visually recognized by the user who is in front of the toilet bowl. As a result, the operability of the push button is improved. In addition, since the user seated on the toilet bowl 10 can visually recognize each push button without twisting his body,
The user can wash the toilet by operating each push button when standing up from the sitting posture.

As described above, the flush toilet 10 having the flush water tank 100 integrated with the toilet body 11 has the lower portion of the toilet including the toilet body 11 and the upper portion of the toilet including the rim 14 and the flush water tank 100 in manufacturing the toilet. Molded separately for each part. Then, the upper and lower substrates after molding are joined and fired to form the toilet bowl 10. In this case, a bottom mold for forming the outer wall shape of the toilet bowl portion 12 and the inner shape of the toilet body portion 11 and an inner wall shape of the toilet bowl portion 12 are formed in the molding of the lower portion of the toilet bowl (base molding). And a left-right measuring mold for forming the outer shape of the left and right side surfaces of the toilet body 11. To mold the upper part of the toilet bowl (base molding), the bottom shape of the rim 14 and the toilet body 1
No. 1 bottom part for forming the bottom part of the rear part and the bottom part of the lateral tank part 104, an upper part for forming the opening part of the rim 14 and the upper part appearance shape, and the upper part of the rear part of the toilet body; A split-type split die for forming the peripheral appearance shape of the tank 100 and a split-type middle die incorporated in the split die for forming the tank inner wall shape are used. The mold shapes of these molds are determined by the appearance of the toilet bowl shown in FIG.

Next, details of the drain valve device 110 and the toilet body 11 for draining the wash water from the wash water tank 100 will be described step by step. FIG. 5 shows a drain valve device 1
1 is an explanatory view showing the configuration of 10 in a sectional view taken along line 5-5 of FIG. 1, FIG. 6 is a sectional view taken along line 6-6 of FIG. 5, and FIG. 7 is 7- of FIG.
It is a 7 line sectional view.

The drain valve device 110 is used for the wash water tank 100.
It is arranged in the drainage valve arrangement portion 107 of the side tank portion 104 in the following manner. The drainage valve installation portion 107 has an opening 107a on the bottom surface thereof, and a valve seat sleeve 107b is watertightly mounted in the opening via a fixture 107c and a seal ring 107d. The valve seat sleeve 107b is
The through hole serves as a drain port 108 for washing water in the tank, and the upper edge of the through hole serves as a valve seat 109. As shown in FIG. 2, an L-shaped pipe 107e is attached to the fixture 107c, and the cleaning water in the tank is passed through a rim water passage described later through this pipe.

The drain valve device 110 is in contact with the valve seat 109 around the drain port 108 and opens and closes the drain port 108, and the valve body 112 is provided at the lower end and moves up and down to open and close the valve body. Hollow shaft 114 and open valve body 11
2 and a float mechanism 120 for closing the valve. The float mechanism 120 has a float 122 and a sleeve 124 that surrounds the float 122 and forms a float float-sink region.

The float 122 has a bottomed cylindrical body 122a.
The hollow shaft 114 is integrated with the hollow shaft 114 such that the open side of the hollow shaft 114 faces downward. The float 122 is submerged in the cleaning water in the tank with the air left inside during the standby for cleaning shown in FIG. The float 122 in this state exerts a buoyancy force caused by being submerged in water on the valve body 112 via the hollow shaft 114 when the valve body is opened.
Maintain 12 valves open. By the float buoyancy is reduced with a decrease in the tank level, the valve body 112 is closed. The behavior of the float when maintaining and closing the valve body will be described later.

The valve body 112 has a closed seal 1 at the upper end with a bottom.
Have 23. The closing seal 123 is used for the float 12
As a result, the through hole 128, which will be described later, is closed from below. The closing seal 123 is formed of a sheet material of rubber / soft resin (for example, soft polyvinyl chloride (PVC), foamed polyethylene (PE), etc.), and prevents gas and liquid from leaking through the through hole 128 closed as described above. Block distribution. The degree of shielding will be described later.

The float 122 has a cylindrical body 122a.
An inner sleeve 122b is provided on the inside, and both of them are hermetically held by a seal ring 122c on the inner sleeve side.
FIG. 8 is an explanatory diagram for explaining how the inner volume of the float 122 is varied by the inner sleeve 122b. As shown, the float 122 includes an inner sleeve 122.
By pulling b downward, the internal volume can be increased or decreased, and the amount of buoyancy applied when submerged in water can be adjusted.

The sleeve 124 is arranged on the upper surface of the drain valve arrangement portion 107, and is fitted and fixed to the upper edge of the valve seat sleeve 107b. In the sleeve 124, legs 124a are erected at equal intervals around the lower end side of the sleeve, and the openings between the legs surround the periphery of the valve seat 109. Therefore, the opening between the legs serves as a water passage when the wash water in the tank reaches the drain port 108 and is drained. This inter-leg opening can also be used as an air inlet hole 134 described later, or the air inlet hole 1 can be used.
It may be provided separately from 34. The sleeve 124 is
A lid 126 is provided on the upper end side, and the hollow shaft 1 is provided at the center of the lid.
A through hole 128 into which 14 enters. Also, sleeve 1
Reference numeral 24 designates the upper part of the lid 126 as an upper water storage part 130 for storing the cleaning water in the tank at the time of waiting for cleaning shown in FIG. As shown in the figure, in this embodiment, the upper water storage unit 1
The water level that exceeds the upper end of 30 by about several millimeters is the full water level of the wash water, and in this state, the wash water of the above-described full water amount (about 5.6 liters) is stored. Note that the hollow shaft 114 is provided with overflow holes 115 at equal pitches for guiding the increased cleaning water to the drainage port 108 when the cleaning water is supplied to exceed the specified water level when the water supply mechanism (not shown) supplies water. ing.

The sleeve 124 is provided with through-hole projections 129 projecting from the opening edge of the through-hole 128 to the center at an equal pitch (see FIG. 6), and below the lid 126, the inner wall projecting from the inner wall of the sleeve to the center. The ridges 132 are provided at an equal pitch (see FIG. 7). The through hole protrusion 129 and the inner wall protrusion 132
Respectively face the hollow shaft 114 and the float 122 with a slight gap left between the hollow shaft 114 and the outer circumference of the float 122. Therefore, the hollow shaft 114 is guided by the through-hole projection 129 to move up and down substantially straightly, and even in the float 122, it moves up and down almost straight inside the sleeve 124. As a result, the valve body 112 abuts the valve seat 109 at substantially the same position to close the drain port 108. Since the outer circumference of the hollow shaft 114 is in contact with the through-hole projections 129 only by the inner wall projections 132, the hollow shaft 114 moves up and down smoothly.

Since the inner wall ridges 132 only exist at an equal pitch, the gap between the float 122 and the inner peripheral wall of the sleeve 124 is wide, as can be seen from the figure. Therefore, as will be described later, when the air flows into the sleeve from the air inflow position in the lower portion of the sleeve, the inflow air quickly rises to the lid 126 of the inner wall of the sleeve through the gap. If the sleeve 124 has an inner diameter that is slightly larger than the outer diameter of the float 122, the outer diameter of the sleeve can be reduced, and the size can be reduced. In this case, if a vertical groove is formed on the inner wall of the sleeve between the lower end of the sleeve and the lid 126, this vertical groove serves as the above-mentioned rising path of the inflowing air, and the inflowing air is quickly swept. It can be raised to 126.

The sleeve 124 has air inlet holes 134 on the peripheral wall of the lower portion at equal pitches. This air inlet hole 134
When the water level in the tank outside the sleeve 124 drops to the upper end of the air inflow hole, the air in the tank flows into the sleeve and participates in closing the valve body as described later. The timing of this air inflow is determined by the hole upper end position of the air inflow hole 134.
Therefore, the total amount of cleaning water can be regulated by adjusting the upper end position of this hole. In this embodiment, the opening position of the air inflow hole 134 is adjusted so that the total amount of cleaning water is about 5.5 liters. At this time, the wash water tank 10
A total bottom area of 0 is also considered.

Next, the valve opening mechanism of the drain valve device 110 will be described. The drainage valve device 110 includes a lifting operation engaging member 140 formed at the upper end of the hollow shaft 114.
And a large-washing press button 142 and a small-washing push button 144 that are vertically movable on the upper surface of the lid body 106. The two push buttons are arranged side by side as shown in the drawing, and both are located above the hollow shaft 114. Then, the pressing operation of each pressing button is converted into a lifting operation of the hollow shaft 114 by the large cleaning link piece 143 and the small cleaning link piece 145, which are small parts swingably supported below the button. It is sufficient for these link pieces to swing below the buttons, and they are arranged close to both push buttons. Therefore, it is not necessary to extend the shaft from the side surface of the tank to support the link piece swing support, and further, it is not necessary to enlarge the swing support shaft or the column. As a result, it is possible to simplify the link piece supporting structure for converting the pressing operation of each pressing button into the valve opening operation of the drain valve device 110 and transmitting the same.

Each of the large washing push button 142 and the small washing push button 144 is constantly urged upward by a spring (not shown) so as to return to the original position after the pushing operation. The pressing operation of each pressing button is converted into the rotating operation of the large cleaning link piece 143 or the small cleaning link piece 145. When this link piece rotates, the engaging arm 146 that engages each link piece with the lifting operation engaging tool 140.
The hollow shaft 114 is lifted up through the valve body 1
12 separates from the valve seat 109 and opens the drain port 108.
As a result, drainage of the cleaning water in the tank (water supply to the toilet) is started.

The drain valve device 110 includes the hollow shaft 1 when the above-mentioned push buttons for large washing and small washing are pressed.
A shift amount adjusting mechanism 148 for selectively selecting the ascending operation length of 14 from short to long is provided. As shown in FIG. 5, the shift amount adjusting mechanism 148 includes a piece 14 that is rotatable in a pendulum shape.
9 and a piece 149 extending from below the large cleaning push button 142.
And a rotation regulating plate 150 that regulates the rotation of the.
The piece 149 is biased in the direction of arrow X in the figure by a spring (not shown), and the tip of the piece is brought into contact with the outer periphery of the hollow shaft 114 on the upper end side. Rotation restriction plate 150
Is urged upward by a spring (not shown), and moves down in response to the pressing operation of the large cleaning pressing button 142. The rotation restricting plate 150 is inserted between the tip of the piece 149 and the outer peripheral wall of the hollow shaft 114 by this lowering operation, and the tip of the piece is held in the hollow shaft 114 while the hollow shaft 114 is moving upward. Keep away from. Thereby, as will be described later, the hollow shaft 11
The lift amount of 4 increases. The rotation restricting plate 150 is
When the small washing pressing button 144 is pressed, it stops at the position shown in the figure, so that the piece 149 receives the spring biasing force and brings the tip of the piece into contact with the outer periphery of the upper end side of the hollow shaft 114 as described above. This reduces the lift amount of the hollow shaft 114, as will be described later.

Next, how the cleaning water in the tank is discharged when the above-mentioned push buttons are operated will be described together with the behavior of the float 122 and the like. FIG. 9 shows the large-cleaning push button 14.
FIG. 9 is an explanatory diagram showing the state of drainage of wash water and the behavior of each member in the first half portion during the large washing in which 2 is pressed.
FIG. 9A is an explanatory diagram showing a state at the time of operating a button, and FIG. 9B is an explanatory diagram showing a state during discharge of cleaning water. FIG. 10 is an explanatory diagram showing how the cleaning water is discharged in the latter half portion of the large cleaning and the behavior of each member. FIG. 10A shows the state near the end of the discharging period, and FIG. 10B shows the cleaning water discharge. It is explanatory drawing which shows the mode at the time of an end. For convenience of explanation, the push button that is the operation target is drawn separately.

When the large washing push button 142 is pressed in the washing standby state shown in FIG. 5 as indicated by the arrow La in the figure, the large washing link piece 143 rotates as indicated by the arrow La1 and lifts the engaging arm 146. . As a result, the hollow shaft 114 rises as shown by the arrow La2. At this time, since the rotation restricting plate 150 descends as shown by the arrow La3, the tip of the piece 149 does not enter the lift restricting hole 116 of the hollow shaft 114. Therefore, when the large washing push button 142 is operated, the hollow shaft 114 is in the position defined as the rising end, that is, in FIG.
As shown in (a), the float 122 rises to a rising end position where the closing seal 123 is brought into contact with the lower surface of the lid 126. As a result, the through hole 128 becomes the closing seal 12
Blocked by 3. Since the lift restricting holes 116 are formed so as to face each other, the hollow shaft 114 can be assembled even in a state of being rotated by 180 degrees in relation to the lifting operation engaging tool 140.

In this embodiment, the lowering of the rotation restricting plate 150 prevents the tip of the frame from entering the lift restricting hole 116, but the invention is not limited to such a structure. For example, when the large-wash press button 142 is pressed, the rotation restricting plate 150 may be tilted by the button, and the plate may be used to rotate the piece 149 away from the hollow shaft 114.

When the hollow shaft 114 rises in this way, at the same time as this rise, the valve body 112 separates from the valve seat 109 and opens the drain port 108. As a result, drainage of the cleaning water in the tank (water supply to the toilet) is started. Float 12
2 exerts its own buoyancy (float buoyancy) on the valve body 112 and maintains the valve open state of the valve body 112. Even when the valve is closed, the float 122 exerts the float buoyancy on the valve body 1.
12, the valve body 112 is maintained in the valve closed state by the difference between the water head pressure received from the tank cleaning water and the float buoyancy.

On the other hand, since the float 122 constantly presses the closing seal 123 against the lower surface of the lid 126 by its buoyancy, the closing state of the through hole 128 by the closing seal 123 is maintained. While the valve body is kept open and the through hole is kept closed, the tank cleaning water is continuously drained from the drain port 108, so that the tank water level is lowered.

The water level in the tank is the uppermost end of the sleeve 124,
That is, the water level in the tank is uniformly lowered inside and outside the sleeve until it reaches the upper end of the peripheral wall of the upper water storage section 130. After the water level in the tank has dropped below the upper edge of this surrounding wall, after
In the sleeve 124, the through hole 128 remains closed by the closing seal 123 of the float 122, as shown in FIG. Therefore, air does not flow into the sleeve, the inside of the sleeve remains filled with cleaning water, and the through hole 128 also remains blocked by the float 122 that receives buoyancy. Even during this period, the water level in the tank continues to decrease outside the sleeve (see FIG. 9B).

When the water level in the tank drops to the upper end of the opening of the air inflow hole 134 at the lower end of the sleeve 124 (see FIG. 10).
(See (a)), the air flows from the outside of the sleeve to the inside through the respective air inflow holes 134, and the inside of the sleeve is released to the atmosphere. Therefore, the cleaning water filling the inside of the sleeve is discharged from the drain port 108 as the air flows into the sleeve.
It is drained from inside the sleeve via. Float 122
It descends according to the water surface in the sleeve as the cleaning water in the sleeve drains. In this case, the cleaning water in the sleeve is drained 10
Since the air is discharged all at once from the float 8, the float 122 may be exposed all at once and the float buoyancy may disappear.
Therefore, the valve body 112 descends to the valve seat 109 side to close the drain port 108, and the drain of the wash water in the tank (water supply to the toilet) is completed (see FIG. 10B). In this embodiment,
The opening height of the air inlet holes 134 and the number thereof are adjusted so that about 5.5 liters of the washing water can be discharged before the valve body is closed.

When the air flows into the sleeve through the air inflow hole 134 in this way, the residual cleaning water in the upper water storage section 130 vigorously flows down through the through hole 128 as the atmosphere in the sleeve is released. Since the residual wash water that flows down forcibly pushes the float 122 downward, the float 122 promptly moves together with the inflow of air into the sleeve.
26 Move away from the bottom surface. Therefore, the valve body 112 causes the valve closing operation with good responsiveness, and the responsiveness of the completion of drainage of the washing water in the tank is also enhanced. When the valve body 112 is closed and the drainage is completed, the wash water replenishing device (not shown) is used to wash the wash water tank 10.
0 is supplied with new cleaning water, and the cleaning standby state shown in FIG. 5 is entered.

By the way, if the through hole 128 is not sufficiently closed and there is a gap at the closed portion, air flows into the sleeve through the gap, and the water level in the tank is changed to the air inlet hole 1.
Before reaching 34, the inside of the sleeve is released to the atmosphere. However, in this embodiment, the upper water storage portion 13 above the through hole 128 is used.
Since the wash water is stored in 0, even if there is a gap, the wash water leaks from this gap. While the leakage is occurring, the through hole 128 does not release the atmosphere in the sleeve, and the float 122 can be left floating and the through hole 128 can be kept closed. Therefore, the closing seal 123
It is not necessary to ensure the strict water tightness of the through hole 128 due to the above, and each member does not require high dimensional accuracy or assembly accuracy. Therefore, the management and maintenance of the component processing process and the assembly process become simple, which is beneficial for cost reduction.

Further, in the drain valve device 110, when draining the wash water of a predetermined amount (about 5.5 liters), the wash water is stored in the upper water storage section 130 and the through hole 128 is closed by the float as described above. You just need to keep up.
Therefore, in the wash water tank 100, the tank water amount (about 5.6 liters) slightly exceeding the predetermined water amount may be accumulated in the rear tank portion 102 and the side tank portion 104 and stored. Then, as shown in FIG. 5 and the like, the full water level when the tank water amount is stored slightly exceeds the upper end of the peripheral wall of the upper water storage section 130 (in this embodiment, about 12.5 c).
m). Therefore, even if the valve body 112 has a large area, the lift force required to open the valve body 112, that is, the lifting force of the hollow shaft 114 when the large cleaning push button 142 is pressed is performed. It can be made small and maintain operability and drainage capacity.

Next, the case where the small washing push button 144 is pushed will be described. FIG. 11 is an explanatory diagram showing the state of drainage of washing water and the behavior of each member in the first half portion of the small washing when the small washing pressing button 144 is pressed, and FIG. 11A shows the state when the button is operated. (B) is an explanatory view showing a state in the middle of discharging the cleaning water. FIG. 12 is an explanatory diagram showing how the cleaning water is discharged in the latter half part of the small cleaning and the behavior of each member. FIG. 12 (a) shows the state near the end of the discharging period, and FIG. 12 (b) shows the cleaning water discharge. It is explanatory drawing which shows the mode at the time of an end.

When the small washing push button 144 is pressed in the washing standby state shown in FIG. 5 as indicated by the arrow Lb in the figure, the small washing link piece 145 rotates as indicated by the arrow Lb1 and lifts the engaging arm 146. . As a result, the hollow shaft 114 rises as shown by the arrow Lb2. At this time, since the rotation restricting plate 150 is in the same position, the piece 149 presses the tip of the piece against the outer peripheral wall of the hollow shaft 114. In this state, the hollow shaft 114 rises, so that the tip of the piece 149 enters the lift restriction hole 116. For this reason, as shown in FIG. 11A, when the small washing push button 144 is operated, the hollow shaft 114
Rises only up to an intermediate position before (downward in the drawing) the above-mentioned rising end position (see FIG. 9A). In this case, since the float 122 does not reach the lower surface of the lid 126, the through hole 128 remains open.

Although the tip of the piece is inserted into the lift regulating hole 116 by not moving the rotation regulating plate as described above, the present invention is not limited to this structure. For example, when the small washing pressing button 144 is pressed, the rotation restricting plate 150 is tilted by the button, and the plate 1
It is also possible to configure 49 to rotate to the side of the hollow shaft 114.

Simultaneously with the ascent of the hollow shaft 114, the valve body 112 separates from the valve seat 109 and opens the drain port 108. As a result, drainage of the cleaning water in the tank (supply of water to the toilet) is started, and the valve open state of the valve element 112 is maintained by the float buoyancy, as in the case of large cleaning. This allows
The water level in the tank drops.

In this case, since the through hole 128 is opened, the water level in the tank is similarly lowered inside and outside the sleeve until it reaches the lid 126. That is, the cleaning water stored in the upper water storage section 130 flows down into the sleeve through the through hole 128 as the water level on the outside of the sleeve lowers, and the inside of the sleeve is released to the atmosphere as shown in FIG. 11B. Therefore, even if the water level in the tank is below the lid 126, the water level in the tank is similarly reduced inside and outside the sleeve.

When the water level in the tank is lowered in this way,
As shown in FIG. 2 (a), the float 122 is exposed on the surface of the water as the water level decreases, and then descends with the subsequent decrease in the water level. As a result, as described above, the valve body 112 descends together with the hollow shaft 114 to close the drain port 108 (see FIG. 12B), and the flush water drainage (water supply to the toilet bowl) ends. Such closing of the valve may occur before the water level in the tank reaches the air inflow hole 134 of the sleeve 124 because it is sufficient that the shaft is lowered by an amount corresponding to the rise of the valve body when the push button is operated. Therefore, the total amount of drainage in this case is calculated by pressing the large-wash button 142.
Is smaller than the case where the ascending operation is performed to the above-mentioned ascending end position (see FIG. 9A). As a result, the small washing push button 1
At the time of a small flush accompanying the pressing operation of 44, a smaller amount of flush water than that at the time of a large flush can be drained for supplying water to the toilet bowl. In other words, according to the drain valve device 110 of the present embodiment, different amounts of wash water are used for washing water in the washing water tank 1 when washing the large and small water.
Water can be supplied (discharged) from 00 to the toilet bowl.

Next, the toilet body 11 receiving the wash water supply from the wash water tank 100 will be described.
FIG. 13 is an explanatory view for explaining the toilet bowl 10 of the embodiment by breaking the upper surface thereof, and FIG. 14 is an explanatory view showing the toilet bowl 10 of FIG. 13 in a sectional view leftward along the center line in the front-rear direction. FIG. 15 is an explanatory view showing the toilet bowl 10 in a sectional view to the right, and FIG. 16 is an explanatory view for partially cutting away the vicinity of the central portion of the rim shown in FIG.

As shown in these drawings, the rim 14 at the upper edge of the toilet body 11 of the toilet bowl 10 is the bowl ball portion 1.
It is formed so as to surround 2 and has a hollow rim water conduit 16 therein. The rim water conduit 16 is connected to the flush water supply channel 18 on the rear side of the toilet.

The flush water supply passage 18 extends toward the sleeve side of the toilet, and the L-shaped pipe 10 from the drain valve device 110 shown in FIG.
7e (see FIG. 2) is stored. This L-shaped pipe 107e
Is fixed in a watertight manner in the connection hole 19 of the wash water supply passage 18, and introduces the wash water in the tank of the wash water tank 100 into the wash water supply passage 18. The wash water thus supplied to the wash water supply passage 18 enters the rim water guide passage 16 from the left and right directions and is guided around the upper edge of the toilet bowl portion 12, as shown in FIG.

The bowl part 12 of the toilet bowl has a ball bottom part 13.
Is connected to the siphon trap 20. The siphon trap 20 has a trap inlet 22 that opens toward the ball bottom 13 and an ascending pipeline 24 that forms a pipeline from the trap inlet 22 toward the rear of the toilet.
And a top conduit portion 26 that is connected to the upper end of the ascending conduit portion 24 and is curved downward, and a descending conduit portion 28 that is connected to the top conduit portion 26 and that descends. The top pipe line portion 26 is provided with a top weir 30 that is bent toward the descending pipe line portion 28 at a connection portion with the ascending pipe line portion 24, and the sump weir 30 stores the accumulated water RS stored by the toilet bowl portion 12. Specify the water level. The pipe shape of the siphon trap 20 will be described later.

The rim 14 is attached to the rim water conduit 16 as shown in FIG.
On the left side of the toilet shown in FIG. 3, a base first water discharge hole 41, a base second water discharge hole 42, a left center water discharge hole 43, and a left center water discharge hole 43 and a rim front end side water discharge hole 44 are provided. A porous first water discharge hole 45 is provided between them, and a left central water discharge hole 4 is provided.
3 and the base second water discharge hole 42 between the porous water discharge hole 4
Have six. Further, the rim 14 is provided with a right central portion water discharge hole 47 on the right side of the toilet, and between the right central portion water discharge hole 47 and the rim front end side water discharge hole 44, the porous second straightening water discharge hole 4 is formed.
8. A third correction water discharge hole 49 is provided, and a porous fourth correction water discharge hole 50 and an auxiliary water discharge hole 51 are provided between the right central water discharge hole 47 and the connection portion of the wash water supply passage 18.

Base first water discharge hole 41 and base second water discharge hole 42
Is formed on the bottom side of the rim water conduit 16 and has a long hole shape (in the present embodiment, width × length is 12 × 43 mm at the base first water discharge hole 41 and 13 at the base second water discharge hole 42). × 3
5 mm). Auxiliary water discharge hole 46, first correction water discharge hole 45, rim front end side water discharge hole 44, second correction water discharge hole 4
8, third correction water discharge hole 49, right center water discharge hole 47, fourth
The correction water discharge hole 50 and the auxiliary water discharge hole 51 are each formed in a substantially circular hole shape on the bottom side of the rim water conduit 16. In this case, in the present embodiment, the diameter of the water discharge hole is about 4 mm for the auxiliary water discharge hole 46 and the auxiliary water discharge hole 51, about 13 mm for the first correction water discharge hole 45, and the rim front end side water discharge hole 44 and the second water discharge hole 44.
Straightening spout 48 is about 10 mm, third straightening spout 49
And the fourth straightening water discharge hole 50 is about 5 mm, the right center water discharge hole 4
7 is about 16 mm.

The wash water flowing into the rim water conduit 16 has a velocity (flow velocity) depending on the flow rate given by the wash water supply device.
Then, when the water passes through the rim water conduit 16 along the water conduit path and reaches each water discharge hole, it has a directionality according to the position of the water discharge hole around the rim water conduit. Therefore, as shown in FIG. 13, each of the above-described water discharge holes discharges the washing water along the surface of the toilet bowl portion 12 toward the ball bottom portion 13 while reflecting the directionality of the washing water. ..

Left ridges 52 and right ridges 53, which are bulged from the bottom of the water conduit, are formed in the rim water conduit 16 at substantially the right and left central portions of the toilet bowl. These ridges distinguish the rim water conduit 16 into an expanded water conduit 16a with a wide cross-sectional area on the upstream side and a narrow water conduit 16b with a narrow cross-sectional area on the downstream side with respect to the wash water flow direction. To do. Therefore, the amount of wash water to be flushed is increased in the expanded water conduit 16a, and the wash water that has been rectified by the left and right ridges flows through the narrow water conduit 16b.

When the cleaning water is discharged from each of the above-described water outlets such as the base first water outlet 41, the base first water outlet 41 and the base second water outlet 42 have a long hole shape. Since it is the water discharge hole in the expanded water guide path 16a and is close to the wash water supply path 18, the discharge amount of the wash water is larger than that of the other water discharge holes. Further, the direction of the discharge cleaning water of the first correction water discharge hole 45, the right center water discharge hole 47, the rim front end side water discharge hole 44, and the second correction water discharge hole 48 is adjusted by the narrow water conduit 16b. The wash water is discharged in a stable state, and the discharge amount at that time depends on the hole diameter.

As shown in FIG. 16, the left central water discharge hole 43 is formed in the left raised portion 52 with a hole diameter of about 16 mm, and its opening direction is the direction in which the extension water conduit 16a is flushed with water. Matches Therefore, the cleaning water discharged from the left central water discharge hole 43 goes straight through the left central water discharge hole 43 and is guided to the upper peripheral wall 55 of the toilet bowl portion 12 at the lower end of the rim 14 to discharge the water. The locus is as shown by the ejection locus TS in the figure. In this case, the rim 14
Has a drooping plate portion 56 on the side of the toilet bowl portion 12 of the narrow water conduit 16b from the left raised portion 52 to the front side of the toilet bowl, and defines the front region of the left central water discharge hole 43 as the drooping plate portion 56.
It is surrounded by the bottom surface portion 57 and the upper peripheral wall 55 of the narrow water conduit 16b. Therefore, the left central water discharge hole 43 discharges the wash water along the above-described discharge trajectory TS with high directivity and convergence.

Next, the behavior of the cleaning water when the cleaning water is discharged from the above-described base first water discharge hole 41 will be described. FIG. 17 shows a base first water discharge hole 41 and a base second water discharge hole 42.
Explanatory diagram for explaining the behavior of the cleaning water discharged from
Reference numeral 8 is an explanatory view for explaining the washing water discharge from the left central water discharge hole 43, the first correction water discharge hole 45, the rim front end side water discharge hole 44, the second correction water discharge hole 48, and the right center water discharge hole 47. Yes, FIG. 18A is an explanatory view for explaining the behavior of the cleaning water when it is assumed that the cleaning water is discharged from each of the water discharge holes independently.
FIG. 18B is an explanatory diagram for explaining the behavior of the wash water caused by the discharge of the wash water from each water discharge hole. FIG. 19 is an explanatory view for schematically explaining the behavior of the wash water caused by the discharge of the wash water from all the water discharge holes, and FIG. 20 shows that each main stream causing the wash water behavior joins the accumulated water RS individually. FIG. 21 is an explanatory diagram for schematically explaining the virtual state, and FIG. 21 is an explanatory diagram for schematically explaining the behavior of the swirling in the stored water when both main flows join the stored water RS at the same time.

Base first water discharge hole 41 and base second water discharge hole 42
As shown in FIG. 13 and FIG. 17, is formed at the rear side of the toilet bowl and opens at the bottom of the expanded water conduit 16a. Therefore, the both water discharge holes discharge the wash water toward the front of the toilet from obliquely above the stored water RS. In this case, both of the water discharge holes are in the shape of long holes,
The cleaning water is discharged in a wide range and spreads more than the long hole shape. Since both the water discharge holes are formed adjacent to each other, the flow of the wash water after the discharge is merged. Therefore, such a merge makes the main flow of the flow having the accurate directionality and the strong water force (the first main flow S1). Is formed, and the first main flow S1 joins the stored water RS. The first mainstream S1 joins the stored water RS from the above-mentioned water discharge hole position and flush water discharge direction from the left back of the toilet to the diagonally right front in a plan view as shown in the drawing. Further, since the first main flow S1 is due to the merging of the wash water flows from both the water discharge holes, the first main flow S1 joins the stored water RS with a stable trajectory. The cleaning water discharged from the both water discharge holes and not involved in the formation of the first main flow S1 is
As a flow on both sides of the main stream S1, it joins the accumulated water RS, and the surface of the toilet bowl portion 12 to which the first main stream S1 does not reach is washed away. The same applies to the cleaning water discharged from the auxiliary water discharge hole 46.

The left central water discharge hole 43 is formed in the rim water conduit 16
The wash water guided to is discharged from the same side as the first base water discharge hole 41 and the second base water discharge hole 42 (specifically, the left side of the toilet bowl). As shown in FIG. 18A, the wash water thus discharged flows along the above-described discharge trajectory TS that circulates along the upper peripheral wall 55 (see FIG. 16). However, along with the discharge of the wash water from the left central water discharge hole 43, the wash water from the first correction water discharge hole 45, the rim front end side water discharge hole 44, the second correction water discharge hole 48, and the right center water discharge hole 47. Discharge is also occurring. The discharge of the wash water from each of these water discharge holes intersects with the discharge trajectory TS of the wash water discharged from the left central water discharge hole 43. Therefore, in the flush water flow on the discharge trajectory TS, on the front side of the toilet bowl, the flush water discharged from the first straightening spout hole 45, the flushing water discharged from the rim front end side spout hole 44, and the second straightening spout hole 48. The discharge cleaning water from and the discharge cleaning water from the third correction water discharge hole 49 join together in sequence. Further, on the right side of the toilet bowl, which is the side opposite to the left central portion spouting hole 43, the flushing water on the discharge locus TS is discharged to the flushing water discharged from the right central portion spouting hole 47 and the fourth correction spouting hole 50. The discharge cleaning water of the above joins.

The merging of such cleaning water corrects the flow of the cleaning water on the discharge trajectory TS through the merging, and at the same time, the discharge trajectory T
The flow of the wash water of S is merged to form a main flow (second main flow S2) having a precise directionality and a strong water force, and the second main flow S2 is combined with the accumulated water RS. This second mainstream S2 is
As shown in FIG. 18 (b) for the accumulated water RS, the flow of flush water on the discharge trajectory TS around the upper peripheral wall 55 is merged and corrected on the front side of the toilet and the right side of the toilet. In plan view, join the toilet bowl from the right front to the diagonal left rear.
In the second main stream S2, the wash water discharged from the plurality of water discharge holes such as the first correction water discharge hole 45 has been merged and straightened, and thus a stable trajectory is taken to the accumulated water RS. At the time of merging and summing water, as shown in FIG. 18 (b) and FIG.
Adopting a substantially parallel relationship with S in between, a swirling flow in the same rotation direction is generated in the stored water RS by the confluence of both main flows. In addition, in the auxiliary water discharge hole 51 and the fourth water discharge hole 50 for correction on the side of the water discharge hole, the surface of the bowl bowl portion 12 (the surface on the rear side of the toilet bowl) to which the second mainstream S2 does not reach is washed away.

As described above, the first main stream S1 and the second main stream S2 are substantially parallel to the stored water RS in a plan view of the toilet bowl, and have a relationship so as to cause a swirling flow in the stored water RS in the same rotation direction. Therefore, in the toilet bowl 10 of the present embodiment, when each main flow causes a swirling flow in the stored water RS, the main flows do not disturb each other in the swirling direction. Therefore, since the swirling flow is not disturbed and the swirling is promoted,
The energy (hydraulic force) of the discharged cleaning water can be used without waste for swirling flow generation, and the efficiency of pushing the accumulated water by the swirling flow can be increased through this.

Next, the structure of the inner wall of the ball portion for causing such a main stream joining will be described. FIG. 22 shows the toilet bowl 10 in the vicinity of the confluent of the second main stream S2, which is shown in FIG.
It is explanatory drawing shown in a cross section along line 2-22. This FIG.
As shown in FIGS. 13 to 15, in the toilet bowl 10 of the present embodiment, the inner wall of the toilet bowl side of the toilet bowl on the front side of the toilet bowl is the upper edge peripheral wall 55 below the rim 14 and the sloping slope portion 60 following the upper slope. Then, the inclined portion 61 having a large inclination and the lower end shelf portion 62 with the inclination suppressed are formed, and the lower end shelf portion 62 is positioned near the water surface in the stored water RS. This lower end shelf 62 is the first
The main stream S1 is received to guide the turning and the accumulated water R
As shown in FIG. 20, the swirling condition of the wash water that occurs when the first main flow S1 joins S is set so that the swirling lead S1L of the swirling water RS in the depth direction becomes small.

Further, the inner wall of the toilet bowl portion 12 on the rear side of the toilet bowl is formed as a rearwardly inclined portion 63 which is inclined from the lower side of the rim 14 with a substantially uniform inclination. This rear slanted portion 63 is
Trap entrance 22 of the ball bottom 13 below the surface of the accumulated water RS
Has been reached. In addition, the bowl bowl 12
As shown in FIG. 22, the inner wall of the side surface of the toilet bowl of the toilet has left and right inclined portions 64 with a gentle inclination following the upper peripheral wall 55 below the rim 14.
R and 64L, and the left and right inclined portions 65R and 6 that are greatly inclined
It is set to 5L. The inclined portions 64R and 64L are connected to the inclined portion 60 on the front side of the toilet bowl to serve as flush water receiving surfaces for correcting the flow of the second mainstream S2 described above, and are connected to the rear inclined portion 63 on the rear side of the toilet bowl. The inclined portion 64L guides the first mainstream S1 to near the accumulated water RS, but the first mainstream S
Since 1 flows obliquely from the rear to the front, the guide for the combined merging of the first main flow S1 and the subsequent swirling is provided by the lower end shelf 62 as described above.

The inclined portions 65R and 65L are connected to the inclined portion 61 on the front side of the toilet bowl and to the rearward inclined portion 63 on the rear side of the toilet bowl. The inclined portion 65R and the rearward inclined portion 63 that follows the inclined portion 65R receive the second mainstream S2 corrected as described above and receive the accumulated water RS.
And the second mainstream S2 after merging is stored water R
The swirl state of the wash water that merges with S is specified. In this case, both the sloped portion 65R and the rear sloped portion 63 have a large slope, and the slopes of the sloped portion 65R and the rear sloped portion 63 are as shown in FIG. Of the accumulated water level Δ
The water surface expansion ΔS is about 1/5 to 2/5 with respect to H, and the expansion ratio of the accumulated water surface area is about 40% or less of the original area when the water level rises. In other words, the second mainstream S2 joins the stored water RS with such a large inclination and is swirled and guided by these inclined portions even after the merged stored water. For this reason, the swirling condition of the wash water that occurs when the second main flow S2 merges with the stored water RS is such that the lead S2L of the swirling of the stored water RS in the depth direction becomes large, as shown in FIG. Become. Since the sloped portion 65R, the rear sloped portion 63, and the sloped portion 65L are curved surfaces, the degree of inclination has been described by comparing the accumulated water level rise ΔH and the expanded reservoir surface area ΔS. In the vertical cross-sectional shape thereof, the angle formed between the accumulated water surface and the cross-section peripheral wall surface of the peripheral wall surface portion may be a steep angle of about 5 to 25 °. By doing this, the second guide provided by each of the above-mentioned inclined parts
The main flow S2 can be a swirling flow of a large reed S2L.

By the way, the swirling flows that occur after the above main streams join are not independent, but simultaneously occur in the stored water. Therefore, it is considered that the following behavior is taken.

As described above, the swirling flow caused by the second main flow S2 in the stored water RS so as to increase the swirling lead is such that the pushing of the stored water RS due to the swirling is directed to the ball bottom 13 side, that is, the trap inlet 22. To do. In addition, as shown in FIG. 21, this pushing also affects the swirl flow having a small swirl lead caused by the first main flow S1, so that the first main flow S1
The swirling dirt and the swirling cleaning water itself that are swirling on the swirling flow of No. 1 are pushed toward the trap inlet 22. For this reason,
It is possible to further improve the pushing performance of the accumulated water RS and filth. Even when such pushing is applied, the swirling flow is not disturbed in the swirling direction.

In addition, since the bowl bottom portion 13 of the toilet bowl portion 12 has a mortar shape, the trap inlet 22
The swirl radii of both swirling flows heading toward each other gradually decrease, and the momentum of the swirling flows increases. Therefore, the pushing performance by the swirling flow is further improved.

When the stored water swirl based on the first main flow S1 and the second main flow S2 described above occurs, the wash water and the dirt in the bowl bowl portion 12 are siphon trap 20 from the trap inlet 22.
It enters (is pushed in) and is discharged from the siphon trap 20 as follows. Here, the detailed configuration of the siphon trap 20 will be described prior to the description of the state of filth discharge. FIG. 23 is an explanatory view in which the pipeline is cross-sectionally viewed along the line 23-23 in FIG. 15 for explaining the pipeline configuration of the siphon trap 20, and FIG. 24 shows the descending pipeline section 28 in FIG.
23 is a cross-sectional view taken along the line 24-24 in FIG. 23, and FIG. 25 shows the descending conduit portion 28 in FIG.
FIG. 5 is an explanatory view taken along a line 5-25, and FIG. 26 is an explanatory view taken along a line 26-26 in FIGS. 15 and 23.

The top pipe line portion 26 is continuous with the ascending pipe line portion 24 and extends rearward of the toilet bowl, and flushes wash water from the top weir 30 into the descending pipe line portion 28. In the present embodiment, this top pipe line portion 2
6 has a conduit cross-sectional area larger than that of the ascending conduit portion 24, so that the uppermost portion 70 of the inner wall of the top conduit portion 26 can be air-sealed, as will be described later. .

The top weir 30 has a tongue portion 71 projecting to the side of the descending conduit 28 so as to serve as a guide when the wash water gets over the weir and flows down to the descending conduit 28. Therefore, the wash water that has reached the top weir 30 flows down to the descending conduit portion 28 under the guidance of the tongue portion 71, so that the descending conduit portion 2
8, which will be described later, have an upper conduit shelf 75 and a lower conduit shelf 77.
Reliably reaches, and catches and bounces at these shelves, and flows down to the downstream. Since the tongue portion 71 is curved downward as shown in the drawing, the lower surface region thereof serves as an air reservoir when the cleaning water is discharged.

The descending conduit portion 28 includes a curved conduit portion 72, an intermediate conduit portion 73 and an end conduit portion 74 from the side of the top conduit portion 26.
With. As shown in FIGS. 23 to 26, the descending pipeline 28 connects the curved pipeline 72 and the intermediate pipeline 73 with each other.
The area of the cross section of the conduit is gradually reduced toward the end conduit part 74 and provided. That is, the curved pipe passage portion 72 and the intermediate pipe passage portion 73 are configured such that their cross-sectional areas gradually decrease along the passage direction of the wash water passing through these pipe passage portions, and the state of the gradually changing state is As shown in FIGS. 24 and 25, the toilet is narrowed to the axial center side in the lateral direction of the toilet.

The curved conduit 72 has an upper conduit shelf 75 at the connecting portion of the intermediate conduit 73. The upper pipeline shelf 75 is
The wash water flowing down from the top weir 30 is guided by the tongue portion 71, the wash water bounces off, and the wash water is dropped into the downstream intermediate pipe portion 73.

The intermediate pipe line portion 73 is provided with a lower pipe line shelf portion 77 at the connecting portion of the end pipe line portion 74. This lower conduit shelf 77
Receives the wash water that has flowed down from the tongue portion 71 and the wash water that has passed down the outer peripheral wall portion 76 of the intermediate pipe passage portion 73 from the upper pipe line shelf portion 75, and causes the wash water to bounce off to wash the wash water. It is dropped into the downstream end pipe line portion 74.

The end pipe line portion 74 is so-called slip-in into a drain port (not shown) to connect the descending pipe line portion 28 to this drain port. The terminal pipe line portion 74 is provided with a through hole 78 opened at the lower end leaving the lowermost shelf 80, and the through hole 78 functions as a diaphragm having a narrow opening area. The lowermost shelf 80 is the upper conduit shelf 75 and the lower conduit shelf 7 described above.
The washing water bounced back to the side of the toilet bowl portion 12 at 7 is received to cause the washing water to bounce, and the washing water is guided from the through hole 78 to the drain port.

As described above, since the descending conduit 28 has the upper conduit shelf 75 and the lower conduit shelf 77, the flow rate of the washing water that flows over the top weir 30 and flows down into the descending conduit 28. When the amount is small, it causes catching and rebounding of the washing water in the lower pipeline shelf 77. If the flow rate is large, both the upper pipeline shelf 75 and the lower pipeline shelf 77 receive the washing water and rebound. Wake up. Therefore, regardless of the flow rate of the scavenging wash water, the wash water is received and rebounded at the lowermost shelf 80 of the end pipe line portion 74, and then the wash water is discharged to the drain port. In this case, the positional relationship between the outer peripheral wall portion 76 of the intermediate pipe line portion 73 and the tongue portion 71 of the top weir 30 is the minimum flow rate of the wash water supply device (discharge amount) assumed in this embodiment. (About 40 liters / mi
Even in the case of n), the wash water flowing down from the top weir 30 is surely splashed by the lower pipeline shelf 77. In addition, the conduit area of the intermediate conduit 73 and the end conduit 74
The opening area of 78 in the above is the wash water tank 1 described above.
Even if the water supply flow rate from 00 is the above-mentioned minimum flow rate, it is supposed that the wash water will be stored as will be described later.

The manner in which waste water is discharged by the descending conduit 28 having the above structure will be described with reference to the behavior of the wash water in the descending conduit 28. FIG. 27 is an explanatory view for explaining the behavior of the cleaning water at the initial stage of cleaning, and FIG. 28 is an explanatory view for explaining the manner in which the cleaning water is stored in the terminal pipe line portion 74.
9 is an explanatory view for explaining the situation of occurrence of siphon action.

When the toilet cleaning is started through the operation of the large-flushing push button 142 and the small-flushing push button 144, the flush water flows from the flush water tank 100 into the rim water conduit 16 and, as described above, 1 main stream S1, 2nd main stream S2
The washing water flows into the accumulated water RS. Then, as shown in FIG. 27, the washing water that has entered the rising pipe portion 24 is pushed into the washing water that has flowed into the accumulated water RS,
The water level in the ascending pipe section 24 rises. Such pushing of the wash water occurs due to the swirling flow based on the merging of the first main flow S1 and the second main flow S2 described above into the stored water RS in substantially the same rotation direction.

The wash water thus pushed flows down from the ascending pipe line portion 24 to the descending pipe line portion 28 over the top weir 30 of the top pipe line portion 26. As shown in FIG. 28, this cleaning water is received by the upper pipe shelf 75 and the lower pipe shelf 77 of the descending pipe 28, and bounces off. The wash water that bounces off in this way is directed toward the downstream end pipe line 74 in the direction of the flow of the wash water.
To the downstream side, and at that time, there is a flow down of the pipeline accompanied by the entrainment of air in the descending pipeline and a decrease in the flow rate of the wash water due to the change of the flow direction. Reaching the end conduit portion 74. With such wash water behavior,
On the downstream side of the upper pipeline shelf 75, the sealing of the downstream pipeline with the washing water starts as follows.

Since the terminal pipe line portion 74 is provided with the lowermost end shelf portion 80, the cleaning water is further repelled at the lowermost end shelf portion 80, and then the cleaning water is discharged from the through hole 78. In this case, as shown in FIG. 26, since the opening area of the through hole 78 is narrowed, the terminal conduit portion 74 discharges a part of the wash water from the through hole 78, but does not wash the wash water. Pipe part 79
Store it in.

In the present embodiment, even when the wash water is supplied at the above-mentioned minimum flow rate, the flow-down speed is lowered due to the above-mentioned bounce of the shelf when storing the wash water. Therefore, the flow rate of the washing water that flows over the top weir 30 and flows down into the descending conduit 28 is equal to that of the end conduit 7
It exceeds the flow rate of washing water flowing out to the outlet through 4. Therefore,
At the beginning of cleaning, the storage and storage of the cleaning water in the terminal pipe line portion 74 and the discharge to the drainage port can be performed in parallel. Then, the storage amount of the wash water stored in the terminal pipe line portion 74 increases as the flow of the wash water to the descending pipe line portion 28 is continued. During the continuation of the fall of the wash water, the flow of the wash water that gets over the top weir 30 and flows down into the descending conduit 28 is as shown in FIG.
It acts like a water curtain extending from the tip of the tongue portion 71 of 0 to the upper pipeline shelf 75 or the lower pipeline shelf 77.

In the situation at the beginning of cleaning, in which the cleaning water is stored and discharged in the terminal pipe line portion 74, the air remaining downstream from the upper pipe line shelf portion 75 is repelled by the above-mentioned rack portion. And is discharged from the end pipe line portion 74. Then, since the washing water is continuously stored and stored in the terminal pipe line portion 74, the intermediate pipe line portion 73 and the terminal pipe line portion 74 are filled with the washing water and sealed as shown in FIG. 29. As a result, the water column reaching from the terminal pipe line portion 74 to the top weir 30 is formed by continuing the flow of the washing water thereafter, and the inflow of air from the outside of the through hole 78 is prevented by the washing water column. . Even after the water column is formed, the wash water continues to flow down from the top weir 30 to the descending conduit section 28, and the amount of wash water stored and stored in the terminal conduit section 74 increases. The formed water column in the conduit portion 28 is the through hole 78.
Since the washing water is passed by the water head when it falls to, the decompression phenomenon occurs in the trap. Moreover, the ascending pipeline 2
Since the inflow of the wash water that passes through 4 and gets over the top weir 30 and flows into the descending conduit 28 is continued during this depressurization phenomenon, the air from the ascending conduit 24 side is Does not cause suction. Therefore, due to the difference in height of the accumulated water surface of the toilet bowl portion 12 and the height of the terminal conduit portion 74, a so-called siphon action of sucking the wash water of the toilet bowl portion 12 occurs, and until the siphon disappears due to air suction, The siphon action continues. Therefore, the bowl part 1
The waste of No. 2 is forcibly sucked into the siphon trap 20 and discharged together with the accumulated water and the wash water.

By the way, the air remaining on the uppermost portion 70 of the inner wall of the top conduit portion 26 from the beginning is the uppermost portion 70 of the inner wall.
The air that is still sealed in the above and has not been discharged from the descending conduit 28 due to the above-described entrainment by the cleaning water has already formed a water column in the descending conduit 28, so the It is sealed at the innermost wall 70. Also, air may accumulate on the lower surface of the tongue 71. However, since the washing water is stored and discharged in the terminal pipe line portion 74 and is in a sealed state, the through hole 78 is formed.
Does not cause air ingress from. In addition, the bowl bowl 12
Since there is no air suction on the side of, the water column formed above
Since it is not cut off by the sealing air and the infiltration air, the siphon action generated as described above is continued. Therefore, due to the siphon action, the dirt on the bowl bowl 12 is forcibly sucked into the siphon trap 20 and discharged together with the accumulated water RS.

When the siphon action is generated and continued in this way, the residual air sealed in the uppermost portion 70 of the inner wall of the top pipe line portion 26 is entrained in the suctioned cleaning water and continues with the cleaning water. Expected to be emitted.

By the way, in this embodiment, the descending conduit 28
As shown in FIG. 23 to FIG. 26, the area of the conduit becomes narrower toward the descending side. Therefore, the summit 30
Since the storage and storage of the wash water that has fallen into the descending pipe line portion 28 over the end pipe line portion 74 is promoted, the storage state of the wash water can be more reliably generated. Therefore, it is possible to enhance the reliability of the generation and continuation of the siphon action due to the air discharge and sealing described above. That is, the siphon action ensures the forced suction of dirt and the like, and the waste discharge performance can be improved.

In this embodiment, since swirling is caused by the first main stream S1 and the second main stream S2 having different swirling leads, the pushing efficiency by swirling is enhanced. Therefore, as described above, when the siphon action is generated and continued under the condition that the air remains, the U-shaped pipe is used for the siphon trap 20.
Of the inner wall, for example, near the uppermost part 70 of the inner wall,
It can be confirmed by observing the transition of the liquid level of the U-shaped tube from the start of toilet cleaning. FIG. 30 is an explanatory view showing the installation state of the U-shaped tube for confirming the occurrence and continuation of the siphon action when the air remains, and FIG. 31 is a graph showing the liquid level transition of the U-shaped tube.

As shown in the figure, the liquid level of the U-shaped tube 90 changed to the positive pressure side when the siphon was generated, and then became negative pressure. This can be considered as follows. In other words, in this embodiment, since a small amount of washing water at the beginning of washing seals a part of the descending pipe section, when the washing water is pushed into the siphon trap by pushing by swirling at the beginning of washing, residual air is compressed. Therefore, it can be explained that the pressure in the pipeline increased. The reason why the negative pressure was observed after the positive pressure was generated can be explained by the forced suction of the washing water in the conduit due to the generation of the siphon. Therefore, it is considered that such a toilet bowl that causes the liquid level transition of the U-shaped tube causes the wash water to be pushed in by a strong pushing force in the state where the air remains, and the subsequent siphon action to be generated and continued.

The flow rate of flush water used for flushing the toilet bowl is a total flow rate (about 5.5 liters) that is highly effective as a water-saving toilet bowl.
In the case of the above, with the existing toilet bowl that simply causes a swirl of swirling water, the above-mentioned transition status of positive pressure and negative pressure did not appear, and only a negative pressure phenomenon occurred consistently from the beginning of cleaning. .

Next, the effect obtained by the toilet bowl 10 having the above flush water tank 100 will be described. In the present embodiment, since the full water level in the tank described above is about 12.5 cm, the head pressure is about 1 kPa. This head pressure is about 1/2 to 1/3 of the head pressure (about 2.5 kPa) of the existing tank-type siphon trap toilet. Therefore, it is described whether toilet bowl cleaning can be performed without trouble even with such low head pressure.

The comparative toilet bowl is the above-mentioned siphon trap type toilet bowl, which has a siphon trap having a substantially uniform duct area and causes swirling of the accumulated water by discharging flush water to the bowl bowl. Is. As a comparison test, a general fine particle residual number test and PP, which are used to show the ability to discharge filth, are used.
A (polypropylene) ball remaining number test was performed. In this case, in the fine particle residual number test, about 2 particles of about 4.5 mm in particle diameter are used.
Floating on 500 pieces of accumulated water, the toilet bowl was washed in this state.
In this test, if the number of remaining fine particles is 125 or less, it is considered that the waste material can be discharged. In the PP ball remaining number test, 100 PP balls having a particle size of about 19 mm were floated in the accumulated water, and the toilet bowl was washed in this state. In this test, if the number of remaining PP balls is 25 or less, it is considered that the filth can be discharged. With respect to the toilet bowl 10 of the present example and the above-described comparative example toilet bowl, the above test was conducted while changing the total amount of cleaning water (target value).
FIG. 32 is an explanatory diagram for explaining the flow rates of water supply to the bowl portion of the toilet bowl, inflow into the bowl portion, and discharge of flush water from the trap in the toilet bowl compared with the toilet bowl 10 of the present embodiment. [Fig. 4] is an explanatory diagram showing the results of an evaluation test performed on the toilet bowl 10 of the present example and the comparative toilet bowl described above.

As is apparent from FIGS. 32 and 33,
The toilet bowl 10 according to the present embodiment has a flow rate of water supplied to the bowl bowl portion,
Although the flow rate into the ball section and the flush water discharge rate from the trap were smaller than those of the toilet bowl, the results of the evaluation test increased significantly. That is, according to the toilet bowl 10, the cleaning capacity can be remarkably increased by the current total amount of cleaning water (about 5.5 liters), which is said to be highly effective in saving water. This means that in the present embodiment, since the siphon action described above is reliably occurring, a strong filth / reservoir suction force is working, and the first main flow S1 and the second main flow S2 are substantially parallel and rotate in the same direction. It can be said that the swirling flow pushing due to the merging in the direction works with high efficiency. Therefore, according to the toilet bowl of the present embodiment, a high filth discharge capacity can be exhibited. Although the siphon action was observed even in the comparative toilet bowl, the suction force of the siphon action and the pushing efficiency by the swirling flow were not superior to those of the toilet bowl of this embodiment due to the difference in the results in the fine particle residual number test. It was The PP ball remaining number test was omitted because it was confirmed that a high filth discharge capacity could be obtained as described above.

Next, a fine particle residual number test and a PP ball residual number test were carried out for a water amount (5 liters) smaller than the current total amount of washing water. We were able to demonstrate a higher cleaning capacity than a toilet bowl. Also regarding this result, in the present embodiment, since the above-mentioned siphon action is surely occurring, a strong filth / reservoir suction force is working, and the first main stream S1 and the second main stream S1
It can be said that the swirling flow is pushed in at a high efficiency based on the merging of the main flow S2 in substantially parallel and in the same rotation direction.
In particular, PP, which remains in the stored water despite the small amount of wash water supply of 5 liters (substantially about 4 liters) described above.
The number of balls could be reduced. This can be said to be a result of the swirling flow being pushed in with high efficiency based on the merging of the first main flow S1 and the second main flow S2 in substantially parallel and in the same rotation direction.

Next, the pushing efficiency of the swirling flow was compared. That is, the toilet bowl of the example product and the toilet bowl of the comparative example were put in a state without a siphon trap without changing the flush water supply characteristic to the bowl part of the toilet or the accumulated water, and the pushing efficiency of the swirling flow was compared. Instead of the siphon trap, a P pipe having a wall drainage structure was connected to the upper end of the ascending pipeline 24.
FIG. 34 is an explanatory diagram showing the results of comparison between the example product and the comparative example product with respect to the swirling flow pushing efficiency. The comparison test is
A PP ball remaining number test was conducted.

As shown in FIG. 34, the toilet bowl 1 of this embodiment
According to 0, it was possible to exhibit a higher cleaning ability (efficiency of pushing in the PP balls) than the toilet bowl of the comparative example. Also regarding this result, in the present embodiment, the first mainstream S1 and the second mainstream S1
It can be said that the swirling flow is pushed in based on the merging of the two substantially parallel and in the same rotation direction with high efficiency.

In this embodiment, the above high cleaning ability can be exhibited by supplying the cleaning water at a low flow rate and a low head pressure. When the amount of flush water supplied to the toilet bowl was confirmed, the flush water supply rate was about 80 liters / min for the toilet bowl 10 of this embodiment, and about 150 liters / mi for the comparative toilet bowl.
The result was n. At such a low flow rate, the residual air in the siphon trap could not be expelled from the trap line at the beginning of cleaning, so the existing toilet bowl did not adopt a low flow rate and low head pressure. However,
Based on the new idea that all of the residual air in the siphon trap line will not be discharged at the beginning of cleaning, we were able to realize a high capacity with a small flow rate and low head pressure water supply.

As described above, by adopting a peculiar water discharge form to the peculiar trap conduit and the bowl part of the bowl, the toilet body 11 of the toilet bowl 10 of this embodiment can be supplied with water at a low head pressure. Even if there is, it is possible to wash the toilet properly. Therefore, the flush water tank 100 of the present embodiment that lowers the full water level to reduce the flush head pressure of flush water supply is not limited to the toilet body 11 described above, and other flush toilets capable of flushing with low flush head water can be used. It can also be suitably applied to a toilet bowl. Further, according to the drain valve device 110 of this embodiment, there are the following advantages.

As described above, in the drain valve device 110,
By maintaining and closing the through hole 128 via the float 122 and releasing it, the valve body 112 is maintained open during large cleaning.
Subsequent valve closing can be performed. Therefore, the flush water drainage and drainage stop can be controlled by the behavior of the float alone, and a valve mechanism other than the float is not required. Therefore, according to the drainage valve device 110 of the present embodiment, the valve structure can be simplified, and the assembling manufacturing work can be simplified and the cost can be reduced.

Here, description will be given of another modified example in which the amount of washing water at the time of large and small washing is made different by setting the raising operation of the valve body 112 to either the raising end position or the intermediate position in front of it as described above. To do. FIG. 35 is an explanatory view schematically showing a sleeve upper end main part of a drainage valve device 110B of a modified example,
FIG. 36 is a perspective view schematically showing an essential part of the upper end of the sleeve of the drain valve device 110B.

As shown in these drawings, the drain valve device 110
B is a lift mechanism 1 for lifting the hollow shaft 114.
70 is provided on the upper end of the sleeve 124, specifically, on the upper surface of the lid 126. The lift mechanism 170 includes columns 171 standing upright from the upper surface of the lid 126 and facing each other, and a large cleaning hinge 172 and a small cleaning hinge 173 are provided between the columns. Both of these hinges are individually swingable around a pin 174 supported at both ends by the support column 171.

As shown in FIG. 37, the hinge 17 for large cleaning is used.
2 is a pressing shaft 17 of a large cleaning pressing button (not shown)
5, a push piece 176 pushed in the direction of the arrow La in the figure,
The lifter piece 177 is connected to the push piece.
The lifter piece 177 extends toward the shaft upper end 114 a of the hollow shaft 114. Then, when the push piece 176 is pushed as indicated by the arrow La, the large cleaning hinge 172 rotates the lifter piece 177 about the pin 174 as shown by the arrow La1 in the figure, and this lifter piece 17 is rotated.
7 is moved away from the shaft upper end 114a.

The small washing hinge 173 includes a push piece 179 which is pushed in the direction of the arrow Lb in the drawing by a push shaft 178 of a small washing push button (not shown), and a support column extending from one end side of the push piece and on the side of the large washing hinge 172. 171 and an open-loop support arm piece 180 reaching up to 171. The small cleaning hinge 173 is arranged between the columns 171 in a state where the push piece 179 of itself is aligned with the push piece 176 of the large cleaning hinge 172 as shown in the drawing. In this state,
The small wash hinge 173 is supported by the pin 174 together with the large wash hinge 172. Therefore, small washing hinge 1
73, when the push piece 179 is pushed as indicated by the arrow Lb, the support arm piece 180 is moved around the pin 174 as indicated by the arrow Lb in the figure.
Rotate as shown in 1. In this case, the support arm piece 180
Is supported as described above so as not to interfere with the lifter piece 177 of the large cleaning hinge 172, the small cleaning hinge 173 alone rotates as indicated by arrow Lb1.
However, when the large cleaning hinge 172 rotates the lifter piece 177 as described above, the supporting arm piece 180 is lifted from below by the rotating lifter piece 177 and rotates together with the push piece.

The lift mechanism 170 has a lifter piece 181 in order to convert the above-described rotation operation of each hinge piece into a raising operation (lifting operation) of the hollow shaft 114. The lifter piece 181 is fixed to the upper end of the hollow shaft 114 by a fixture (not shown) and extends upward, and has an engaging shaft 182 at the upper end. The engagement shaft 182 is
It enters into the engaging hole 183 of the support arm piece 180. As a result, when the support arm piece 180 rotates as described above,
Since the lifter piece 181 is lifted straight, the hollow shaft 114 moves up.

The lift of the hollow shaft 114 by the lift mechanism 170 having such a configuration is as follows. When the large wash push button is operated, the large wash hinge 172
Rotates the lifter piece 177, lifts the support arm piece 180 from below with the lifter piece 177, and also rotates the support arm piece 180. As a result, the hollow shaft 114 rises via the lifter piece 181. In this case, since the large cleaning hinge 172 moves the lifter piece 177 away from the shaft upper end 114a, the hollow shaft 114
36 rises to a rising end position shown by a chain double-dashed line in FIG. 36, that is, a position where the through hole 128 is closed by the float 122. Therefore, in this case, as in the case of operating the large cleaning push button 142 in FIG. 5, the prescribed amount of cleaning water (about 5.5 liters) can be supplied to the toilet bowl.

On the other hand, when the small washing push button is operated,
The small washing hinge 173 rotates the support arm piece 180 to lift the hollow shaft 114. In this case, the large cleaning hinge 172 uses the lifter piece 177 as the upper end 11 of the shaft.
It remains located above 4a. Therefore, in the hollow shaft 114, the shaft upper end 114a has the lifter piece 1
It only rises to the position where it comes into contact with 77. Therefore, since the hollow shaft 114 stops at the position before the through hole 128 is closed by the float 122, a phenomenon occurs when the small washing push button 144 in FIG. You can supply flush water to the toilet bowl. Therefore, the drain valve device 110B incorporating the lift mechanism 170
Also, the cleaning water in the tank can be drained so that the amount of cleaning water at the time of large and small cleaning differs.

In the drain valve device 110B described above, the lift mechanism 170 for transmitting the pressing operation of the push button for large cleaning / small cleaning to open the valve body is provided integrally with the drain valve device, and the lift mechanism 170 The above-mentioned both push buttons may be arranged above. Therefore, even in this modification, it is not necessary to extend the shaft from the side surface of the tank to support the swinging support of the large washing hinge 172 and the small washing hinge 173, let alone support the swinging support shaft. There is no need to increase the size of the columns. As a result, it is possible to simplify the configuration for converting the pressing operation of each pressing button into the valve opening operation of the drain valve device 110B and transmitting the same.

Next, another embodiment will be described. Figure 3
7 is a schematic perspective view showing a toilet bowl 200 of another embodiment, FIG.
8 is a front view showing the front of the toilet bowl 200 partially broken away. The toilet bowl 200 is the toilet bowl 1 described above.
Since it has members common to 0, for example, the drain valve device 110, the large washing push button 142 for starting large and small washing, the small washing push button 144, and the like, a configuration different from the toilet bowl 10 will be described.

As shown in these drawings, the toilet bowl 200
Has a toilet body 201 and a flush water tank 210.
The toilet body 201 has the same structure as the toilet body 11 described above in that it has the toilet bowl portion 12 and that water is supplied to the toilet bowl portion 12 from the rim water conduit 16 around the rim 14. The toilet body portion 11 is also provided with a point of introducing tank wash water to the toilet water supply passage 18 on the toilet body side.
And its configuration is common.

The flush water tank 210 is made of pottery which is integral with the toilet body 11, and is located at the upper rear of the body. The flush water tank 210 is wider in the left-right direction than the toilet body 11, and the tank bottom on the right side facing the toilet serves as the drain valve arrangement portion 107. The drain valve device 110 is provided in the drain valve installation portion 107 as described above.

When the flush water tank 210 is widened as described above, it projects from the left and right ends of the toilet bowl by about 8 cm, and the inner wall of the tank has a depth dimension of about 12 cm and a width dimension of about 52 cm. Therefore, in the case of storing the full amount of wash water (for example, about 5.6 liters) suitable for the total flush water (about 5.5 liters) at the time of stool similar to the above embodiment, the wash water tank 210 is stored. The full water level is about 11 cm because the bottom surface area of the tank is about 500 cm ² (about 10 × 50 mm). The tank height of the flush water tank 210 is set to about 20 cm from the upper surface of the toilet body 201 in consideration of a margin for preventing the flushing of the flush water from the full water level and the convenience of assembling the drain valve. This tank height is 1/2 to 1/3 of the existing toilet bowl with tank.
And the depth of the tank is 2 / of the existing toilet bowl with tank.
It is 3 to 1/2. As described above, since the depth of the storage tank can be reduced, the overall length of the toilet body can be reduced, and the size of the toilet body can be reduced. In addition, since the flush water tank 100 can be made low, the entire toilet bowl including this tank can be made into a low silhouette, and the designability can be improved. Further, since the full water level is low as described above, it is possible to maintain the operability of the push button and the drainage capacity due to the reduction of the head pressure, as in the above embodiment. Although the front surface of the tank lid 214 has an arc shape in consideration of design, it may have a flat plate shape, and if it has a flat plate shape, it can have a lower silhouette.

Such a low water level can be achieved by the flush water tank 210 adding the flush water storage region to the rear region of the toilet body, and ensuring the flush water reservoir region on the left and right sides of the toilet body. Therefore, as described in the previous embodiment, the wash water tank 210 of this embodiment can also increase the bottom surface area of the wash water storage portion,
There is an advantage that the depth of the tank portion can be reduced, that is, the toilet body can be made compact.

The tank cleaning water of the cleaning water tank 210 is passed to the rim water passage 16 through the L-shaped pipe 107e connected to the drain valve device 110. Also, this drain valve device 110
The tank cover 214 has a large cleaning pressing button 142 and a small cleaning pressing button 144 at a position above. These push buttons are located above the hollow shaft 114 as described in the above embodiment, and the pushing action is such that the large washing link piece 143 and the small washing link piece 145 (FIG. 5) below the button.
(Refer to FIG. 3) is converted into a lift operation of the hollow shaft 114. That is, even in this embodiment, it is possible to simplify the link piece supporting structure for transmitting the pressing operation of each pressing button.

The large cleaning push button 142 and the small cleaning push button 144 are disposed on the right side of the tank as described above, and the disposition location is on the right side of the toilet body 201. Therefore, even when the toilet lid 11b or the toilet lid and the toilet seat 11a are opened, these push buttons are not blocked by the toilet lid or the valve seat. Moreover, each of the above push buttons
Since it is on the tank lid 214, it is easy to be visually recognized by the user standing in front of the toilet bowl. As a result, the operability of the push button is improved.

Further, in the wash water tank 210, the bottom wall 103 in the tank is inclined toward the drain valve installation portion 107 on the right side. Therefore, the assumed amount of water (about 5.
(5 liters) of washing water is discharged at the end of discharge, the tank washing water in the washing water tank 210 is drained by the drain valve arrangement section 107.
Flows to the side of. As a result, the cleaning water can be prevented from remaining on the left side bottom surface portion side away from the drain valve arrangement portion 107.

The embodiments of the present invention have been described above.
The present invention is not limited to the above examples and embodiments, 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, in the above embodiment, the wash water tank 1
Although 00 has the side tank portion 104 on the right side facing the toilet bowl, it may have the side tank portion 104 on the left side. Further, it is possible to have the side tank portions 104 on the left and right sides of the toilet bowl.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a toilet bowl 10 of an embodiment.

FIG. 2 is a front view showing the front of the toilet bowl with a part thereof cut away.

FIG. 3 is a side view showing a part of a side surface of the toilet bowl with a part cut away.

FIG. 4 is an explanatory diagram for explaining a state of a bottom surface of a flush water tank 100 included in the toilet bowl 10.

5 is an explanatory view showing the configuration of the drain valve device 110 in a sectional view along line 5-5 in FIG. 1. FIG.

6 is a sectional view taken along line 6-6 of FIG.

7 is a sectional view taken along line 7-7 of FIG.

FIG. 8 is an explanatory diagram for explaining how the inner volume of the float 122 is varied by the inner sleeve 122b.

FIG. 9 is an explanatory diagram showing the state of drainage of cleaning water and the behavior of each member in the first half portion during large cleaning when the large cleaning pressing button 142 is pressed.

FIG. 10 is an explanatory diagram showing how the cleaning water is discharged and the behavior of each member in the latter half of the large cleaning.

FIG. 11 is an explanatory diagram showing a state of draining cleaning water and a behavior of each member in a first half portion at the time of small cleaning when a small cleaning pressing button 144 is pressed.

FIG. 12 is an explanatory diagram showing how the cleaning water is discharged and the behavior of each member in the latter half portion of the small cleaning.

FIG. 13 is an explanatory diagram for explaining the toilet bowl 10 of the embodiment with its upper surface cut away.

FIG. 14 is an explanatory view showing the toilet bowl 10 of FIG. 13 in a sectional view leftward along the center line in the front-rear direction.

FIG. 15 is an explanatory view showing the toilet bowl 10 in a sectional view to the right.

FIG. 16 is an explanatory diagram for partially explaining the vicinity of the central portion of the rim shown in FIG.

FIG. 17 is an explanatory diagram illustrating the behavior of the wash water discharged from the base first water discharge hole 41 and the base second water discharge hole 42.

FIG. 18 is a left central water discharge hole 43 and a first correction water discharge hole 4;
FIG. 5 is an explanatory diagram illustrating discharge of cleaning water from the rim front end side water discharge hole 44, the second correction water discharge hole 48, and the right center water discharge hole 47.

FIG. 19 is an explanatory diagram for schematically explaining the behavior of cleaning water caused by discharging the cleaning water from all of the water discharge holes.

FIG. 20 is an explanatory diagram schematically illustrating a state in which it is hypothesized that each main flow that causes the wash water behavior merges with the stored water RS individually.

FIG. 21 is an explanatory diagram schematically illustrating the behavior of swirling in the stored water when both main flows join the stored water RS at the same time.

22 is an explanatory view showing the toilet bowl 10 in a cross-sectional view taken along the line 22-22 of FIG. 13, which is near the confluent water of the second main stream S2.

23 is an explanatory diagram showing a cross-sectional view of the pipe line along line 23-23 in FIG. 15 for explaining the pipe line configuration of the siphon trap 20. FIG.

FIG. 24 is a view showing the descending conduit portion 28 of FIG. 15 and FIG.
It is explanatory drawing which carried out sectional view along the -24 line.

FIG. 25 is a view showing the descending conduit portion 28 at 25 in FIGS. 15 and 23.
It is explanatory drawing which carried out the cross-sectional view along the -25 line.

FIG. 26 is a view showing the descending conduit portion 28 of FIG. 15 and FIG.
It is explanatory drawing which carried out sectional view along the -26 line.

FIG. 27 is an explanatory diagram for explaining the behavior of cleaning water at the initial stage of cleaning.

FIG. 28 is an explanatory diagram illustrating a state in which wash water is stored and stored in the terminal pipe line portion 74.

FIG. 29 is an explanatory diagram illustrating a situation of occurrence of a siphon action.

FIG. 30 is an explanatory diagram showing a U-tube installation state for confirming the occurrence and continuation of the siphon action when the air remains.

FIG. 31 is a graph showing the liquid level transition of a U-shaped tube.

FIG. 32 is an explanatory diagram for explaining the flow rate of water supply to the toilet bowl portion, inflow into the bowl portion, and flush water discharge from the trap in the toilet bowl compared with the toilet bowl 10 of the present embodiment. .

FIG. 33 is an explanatory diagram showing the results of evaluation tests conducted on the toilet bowl 10 of the present example and the comparative toilet bowl.

FIG. 34 is an explanatory diagram showing the results of comparison between the example product and the comparative example product regarding the pushing efficiency of the swirling flow.

FIG. 35 is an explanatory view schematically showing a sleeve upper end main portion of a drainage valve device 110B of a modified example.

FIG. 36 is a perspective view schematically showing a sleeve upper end main part of the drain valve device 110B.

FIG. 37 is a schematic perspective view showing a toilet bowl 200 of another embodiment.

FIG. 38 is a front view showing the toilet bowl 200 with its front surface partially cut away.

[Explanation of symbols]

10 ... toilet bowl 11 ... Toilet body 11a ... toilet seat 11b ... toilet lid 12 ... Bowl bowl 13 ... bottom of ball 14 ... rim 16 ... Rim headrace 16a ... Expanded headrace 16b ... Narrow water conduit 18 ... Wash water supply channel 19 ... Connection hole 20 ... Siphon trap 22 ... Trap entrance 24 ... Ascending pipeline 26 ... Top pipe section 28 ... Descending pipe section 30 ... Summit 41 ... Base first water discharge hole 42 ... Base second water discharge hole 43 ... Left central water discharge hole 44 ... front rim water discharge hole 45 ... First straightening water discharge hole 46 ... Auxiliary water discharge hole 47 ... Water discharge hole at right center 48 ... Second straightening water discharge hole 49 ... Third straightening water discharge hole 50 ... Fourth straightening water discharge hole 51 ... Auxiliary water discharge hole 52 ... Left ridge 53 ... right ridge 55 ... Upper edge peripheral wall 56 ... Hanging plate part 57 ... Bottom part 60 ... Inclined part 61 ... Inclined part 62 ... Bottom shelf 63 ... backward slope 64L ... Inclined part 64R ... Inclined part 65L ... Inclined part 65R ... Inclined part 70 ... Top part of inner wall 71 ... tongue 72 ... Curved conduit 73 ... Intermediate conduit 74 ... Terminal conduit 75 ... Upper conduit shelf 76 ... Outer peripheral wall 77 ... Lower conduit shelf 78 ... Through hole 79 ... Pipe section 80 ... Bottom shelf 100 ... Wash water tank 102 ... rear tank part 103 ... bottom wall 104 ... Side tank part 105 ... Bottom wall 106 ... Lid 107 ... Drain valve installation section 107a ... Opening 107b ... Valve seat sleeve 107c ... Fixing tool 107d ... Seal ring 108 ... Drainage port 109 ... valve seat 110, 110B ... Drainage valve device 112 ... Valve 114 ... Hollow shaft 114a ... upper end of shaft 115 ... Overflow hole 116 ... Lift restriction hole 120 ... Float mechanism 122 ... Float 122a ... Cylindrical body 122b ... inner sleeve 122c ... Seal ring 123 ... Blocking seal 124 ... Sleeve 126 ... Lid 128 ... Through hole 128a ... Auxiliary through hole 129 ... Through-hole protrusion 130 ... Upper water reservoir 132 ... Inner wall ridge 134 ... Air inlet hole 140 ... Lifting action engagement tool 142 ... Large wash push button 143 ... Large cleaning link piece 144 ... Small cleaning push button 145 ... Small wash link piece 146 ... Engaging arm 148 ... Shift amount adjusting mechanism 149 ... piece 150 ... Rotation restriction plate 170 ... Lift mechanism 171 ... Support post 172 ... Large cleaning hinge 173 ... Small washing hinge 174 ... pin 175 ... Pressing shaft 176 ... Push piece 177 ... Lifter piece 178 ... Pressing shaft 179 ... Push piece 180 ... Support arm 181 ... Lifter piece 182 ... Engaging shaft 183 ... Engagement hole 200 ... toilet bowl 201 ... Toilet body 210 ... Wash water tank 214 ... Tank lid

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koichi Ogawa             2-1-1 Nakajima, Kokurakita-ku, Kitakyushu City, Fukuoka Prefecture             No. Totoki Equipment Co., Ltd. (72) Inventor Hiroyuki Tokunaga             2-1-1 Nakajima, Kokurakita-ku, Kitakyushu City, Fukuoka Prefecture             No. Totoki Equipment Co., Ltd. (72) Inventor Takashi Yoshioka             2-1-1 Nakajima, Kokurakita-ku, Kitakyushu City, Fukuoka Prefecture             No. Totoki Equipment Co., Ltd. (72) Inventor Takayuki Otani             2-1-1 Nakajima, Kokurakita-ku, Kitakyushu City, Fukuoka Prefecture             No. Totoki Equipment Co., Ltd. F term (reference) 2D039 AA02 AC03 BA01 DB00 EA04

Claims (7)

[Claims] 1. A toilet bowl for cleaning the toilet bowl part by receiving cleaning water supply from a cleaning water tank storing the cleaning water in the toilet bowl part, wherein the cleaning water tank stores the cleaning water. As a storage part, a rear tank portion located at the upper rear of the toilet body having the toilet bowl portion and a side tank portion extending from the end of the rear tank portion toward the front side of the toilet body are connected. And a drain valve device for opening and closing a drain port on the bottom of the tank for supplying flush water to the toilet bowl part inside the tank part of the rear tank part or the side tank part, A toilet bowl having an operation part for opening the drain valve device on an upper surface or a side surface of a side tank part. 2. The toilet bowl according to claim 1, wherein the flush water tank is integrated with the toilet body such that the rear tank portion is placed on the rear side of the upper surface of the toilet body. There is a toilet bowl. 3. The toilet bowl according to claim 1, wherein the tank portion on the side on which the drain valve device is not installed is a tank portion on the side on which the drain valve device is installed. A toilet bowl having a tank bottom inclined toward the connection point. 4. The toilet bowl according to claim 3, wherein the tank portion on the side where the drain valve device is disposed has a tank bottom surface that is inclined toward a location where the drain valve device is disposed.
Toilet bowl. 5. The toilet bowl according to claim 4, wherein the side tank has the operation portion on the front side of the toilet bowl.
Toilet bowl. 6. A toilet bowl for receiving flush water supply from a flush water tank for storing flush water in a bowl bowl portion to wash the bowl bowl portion, wherein the flush water tank stores the flush water. As a storage part, a rear tank part which is wider in the left-right direction than the toilet main body having the toilet bowl part and is located rearward of the upper part of the toilet main body, and a drain port at the bottom of the tank is opened and closed inside the rear tank part. It has a drainage valve device for supplying flush water to the toilet bowl part, and an operation part for opening the drainage valve device, wherein the operation part is the toilet bowl on the upper surface of the rear tank part. A toilet bowl, which is arranged so as to be displaced laterally from the center of the main body. 7. The toilet bowl according to claim 6, wherein the operation portion is the rear tank when a toilet seat and a toilet lid attached to a rim surface which is an upper edge of a ball portion of the toilet bowl are opened upward. A toilet bowl that is disposed laterally offset from the range that covers the upper surface of the portion.