JP3786071B2 - Flush toilet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flush toilet. More specifically, the present invention relates to a flush toilet that suppresses unpleasant noise during washing and drainage, eliminates return of dirt and washing water, and stabilizes washing performance.
[0002]
[Prior art]
Conventionally, flush toilets having various configurations and structures have been used. In general, flush toilets that discharge filth by the momentum of the drainage flow, such as siphon type, siphon jet type, and wash-off type, are well known.
In addition, there is an on-off valve type flush toilet that collects dirt on the bowl surface and discharges it by opening the on-off valve. This flush toilet has a quiet sound during washing and drainage, and it uses water for washing water. The feature is that it can be made in small quantities. On the other hand, since the reservoir water on the bowl surface of the flush toilet and the piping outside the flush toilet are normally separated by an open / close valve, a separate overflow prevention mechanism for the bowl surface water is required.
Hereinafter, a conventional example of the structure and configuration of the on-off valve type flush toilet will be described with reference to FIG.
In this flush toilet, a horizontal drain pipe 10 extends from the drain port 5 provided at the bottom of the bowl 1 to the rear of the toilet. Behind the drain pipe 10 is connected a valve case 15 having a discharge port 13 at the bottom. An openable on-off valve 12 is installed in the end opening 42 of the drain pipe 10 in the elevation direction of the opening. At the time of washing and draining, the on-off valve 12 is opened, and the washing water on the surface of the bowl 1 is discharged at a stretch together with the filth in the bowl 1. In this way, it is possible to reliably discharge filth and the like without causing siphon action, so that the cleaning performance can be stabilized, and unpleasant noise during cleaning drainage can be suppressed.
Further, an overflow drain pipe 25 is connected to the terminal end of the drain pipe 10. The overflow drain pipe 25 is directed upward from the terminal end of the drain pipe 10, then bent and extended downward, and is connected to the valve case 15. That is, the drain pipe 10 and the valve case 15 are communicated with each other by this overflow drain pipe 25.
Therefore, even when the water level in the bowl 1 rises due to filth, urine, or washing water from the toilet seat with a washing function during use, excess water can be discharged to the outside of the toilet bowl via the overflow drain pipe 25. (For example, refer to Patent Document 1.)
[0003]
[Patent Document 1]
Japanese Patent No. 2978029 (page 3-4, Fig. 1)
[0004]
[Problems to be solved by the invention]
Even in the flush toilet having such an excellent function and effect, in the flush toilet illustrated in FIG. 16, the pipe path of the overflow drain pipe 25 can be temporarily raised in order to secure the bowl water level to a certain height. Necessary, then it must be bent and connected below. This pipe route is very difficult to arrange in the narrow space behind the flush toilet, the pipe diameter is inevitably reduced, and clogging may occur in the pipe entrance and in the middle of the pipe. In addition, the maintainability in the case of clogging was very bad.
The present invention has been made to solve the above problems, and an object of the present invention is to eliminate the overflow drain pipe so that the interior of the toilet rear can be made compact, and there is no occurrence of clogging in the overflow pipe. The purpose is to provide a flush toilet.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the flush toilet of the present invention comprises a valve case having a terminal opening communicating with a drain outlet at the bottom of the bowl ;
Off valve to form accumulated water in the bowl by closing the pre-Symbol terminating opening,
A drain drive means for opening and closing the front SL-off valve by the drive motor,
And a water level control means for maintaining the ball ur the water level within a predetermined range,
In the flush toilet equipped with a valve device that is a water pressure resistance means that urges the water level adjusting means against the water pressure of the bowl water level and biases the opening and closing valve ,
The valve device is
The drive shaft of the motor and the rotation shaft fixed to the on-off valve are arranged coaxially,
When the motor is not operated, the drive shaft and the rotation shaft are in a disconnected state, and the on-off valve is rotatable in a state of being biased in a closing direction,
When the motor is operated, the drive shaft and the rotation shaft are connected to each other, and the rotation shaft is rotated in accordance with the rotation of the drive shaft .
In this invention, by separately provided level regulatory means and drainage driving means, it is possible to adjust the predetermined range the water level in the bowl below.
In other words, when there is an inflow of filth, urine, or wash water from the toilet seat with a cleaning function into the bowl, the water pressure acting on the on-off valve rises when the bowl water level reaches a certain level, opening the on-off valve, The excess water in the bowl can be drained. Therefore, the stored water does not exceed a predetermined height, and the stored water can be prevented from overflowing from the bowl surface.
In addition, the drainage of the excess water in the bowl will cause the water level on the bowl surface to drop, and when the water level reaches a certain level and the water pressure acting on the on-off valve drops, the on-off valve is closed and the water shut off. Can do. In this way, it is possible to prevent the water level in the bowl from becoming lower than a predetermined low water level. Therefore, the water level of the bowl can be kept constant by the opening / closing operation of the on-off valve, and an overflow drain pipe as in the prior art is not required, and the interior behind the flush toilet can be made compact. Furthermore this level regulatory means never clogging occurs as the overflow drain.
Here, the predetermined high water level is an upper limit water level at which the bowl water does not touch the user's body when the user sits on the toilet seat of the flush toilet. The predetermined low water level is a lower water level at which stool sewage or the like can sufficiently catch water and suppress the generation of odor.
[0006]
Further, since the water level adjusting means is a water pressure resistance means that urges the water pressure at the bowl water level and biases the opening / closing valve in the closing direction, the water pressure at the bowl water level works against the direction to open the opening / closing valve. The hydraulic resistance means works in the direction of knowing the on-off valve. Therefore, when these forces are balanced, the bowl water level can be maintained in a range between a predetermined high water level and a predetermined low water level.
[0007]
In addition, by using a motor as the drainage driving means, the on-off valve is forcibly opened and closed to enable cleaning. Further, when the motor is operated, the rotation shaft of the on-off valve and the drive shaft of the motor are connected to transmit the driving force of the motor to open and close the on-off valve. When the motor is not in operation, the on-off valve The rotating shaft and the drive shaft of the motor are not connected, and the stationary torque of the motor is not transmitted to the on-off valve side.
Therefore, when the motor is not in operation, the force that balances the water pressure in the bowl is only the hydraulic resistance means, and the unstable stationary torque of the motor described below is separated from the rotating shaft of the on-off valve, so that the stable water level Holding is possible.
The static torque refers to a magnetic force, a static friction force, or the like that keeps the motor drive shaft structurally stationary with respect to an external force.
[0008]
Here, a concave cam fixed to the rotation shaft of the on-off valve, and a convex cam fixed to the drive shaft of the motor,
When the motor is not in operation, the concave cam and the convex cam are not engaged with each other,
When the motor is operated, the concave cam and the convex cam can be engaged with each other to be connected. In this way, when the motor is operated, the concave cam fixed to the rotary shaft of the on-off valve comes into contact with the convex cam fixed to the drive shaft of the motor, and the motor torque is applied to the rotary shaft of the on-off valve. When the motor is not operated, the concave cam and the convex cam are in a non-contact state, and the stationary torque of the motor does not affect the rotation shaft of the on-off valve. Therefore, it can be set as a non-connection state and a connection state with an easy structure.
[0009]
If the hydraulic resistance means has a structure including a lever portion fixed to the rotary shaft of the on-off valve, and a coil spring having both ends locked to the lever portion and the valve case, The hydraulic resistance means can be obtained with an easy structure using the elastic force.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, examples will be shown with reference to the drawings, and the flush toilet of the present invention will be described in more detail.
FIG. 1 is a sectional view and a partially cutaway side view showing a first embodiment of a flush toilet according to the present invention.
In the example of FIG. 1, a rim portion 2 is provided on the entire periphery along the upper edge of the bowl 1, and a flush water passage 3 is formed inside the rim portion 2. The rim portion 2 is formed with spray holes 6 for the washing water that face the inner surface of the bowl 1 and communicate with the water passage 3. In this example, a horizontal drain pipe 10 extends from the drain port 5 provided at the bottom of the bowl 1 to the rear of the toilet bowl. A valve device 44 is connected to the rear side of the drain pipe 10 via a packing 16.
In addition, a water supply pipe 45 that guides water from the water supply, an electromagnetic valve 26 provided in the middle of the water supply pipe 45, and a control device 46 that controls opening and closing of the electromagnetic valve 26 are provided in the upper rear part of the flush toilet. The electromagnetic valve 26 opens and closes in response to an electrical signal from the control device 46 so that water necessary for discharging waste, cleaning the bowl, and securing a water seal is supplied to the rim portion 2.
[0011]
2, 3, and 4 are a front view, a right side view, and a left side view of the valve device in the present embodiment. Next, the configuration of the valve device will be described with reference to these drawings. FIG. 5 is an exploded perspective view of the cam portion in the present embodiment. The configuration of the cam portion will be described in more detail with reference to FIG.
In this example, the valve device 44 includes a valve case 15 and an on-off valve 12. The valve case 15 has a terminal opening 42 continuing from the drain pipe 10 of FIG. 1 and a discharge port 13 opened at the bottom (see FIG. 1). The on-off valve 12 is rotatably fixed to the rotation shaft 31 and opens and closes the terminal opening 42.
Further, the valve device 44 includes a hydraulic pressure resistance means including a lever 32 fixed to one end of the rotating shaft 31, a protrusion 47 of the valve case 15, and a coil spring 38 that is engaged with the lever 32 at both ends. Thereby, the on-off valve 12 is always urged in the closing direction by the elastic force of the coil spring 38.
Further, the valve device 44 includes drainage driving means including a motor 35 fixed to the valve case 15 via a bracket 37 and a motor drive shaft 36 that transmits the torque of the motor 35 to the outside. The motor 35 is driven and controlled by the control device 46 shown in FIG.
Further, the valve device 44 includes a concave cam 34 fixed to one end of the rotating shaft 31 on the side of the drainage driving means, a convex cam 33 fixed to the motor drive shaft 36, and a stopper 41 formed on the bracket 37. A non-coupling mechanism is provided.
Next, the non-coupling mechanism will be described in more detail with reference to FIG. The convex cam 33 fixed to the motor drive shaft 36 of the motor 35 has its convex portion restricted by a stopper 41 formed on the bracket 37, and rotates in accordance with the normal rotation and reverse rotation of the motor 35. Further, by engaging the concave portion of the concave cam 34 fixed to one end of the rotary shaft 31 fixing the open / close valve (not shown) with the convex portion, the open / close valve (not shown) can be rotated in accordance with the normal rotation of the motor 35. It has become. As can be seen from FIG. 2, the convex cam 33 is restricted by the stopper 41 due to the positional relationship in the axial direction, but the concave cam 34 is in a position where it does not interfere with the axial direction, and the concave cam 34 is not rotated. The stopper 41 is not restricted.
[0012]
Next, the operation of the above embodiment will be described. Here, the operation is divided into three stages, “normal time” when the flush toilet is not used, “when used” from the start of use of the flush toilet to before washing, and “when washing” from the start of washing the bowl surface until the end of use. "
FIG. 6 shows the bowl water level in the present embodiment, and FIG. 7 shows the state of the time displacement of the bowl water level in the present embodiment. FIG. 8 shows the positional relationship among the on-off valve, the cam portion, and the spring portion when the bowl water is drained. Note that (A), (B), and (C) in FIG. 8 correspond to A view, B view, and C view in FIG. The fluctuation of the bowl water level and the operation of each part will be described with reference to FIG. 6, FIG. 7, and FIG.
Here, a predetermined low water level (L0 in FIG. 6) is set to a level at which the excreted filth is sufficiently retained in the accumulated water to suppress the generation of odor, and the user sets the predetermined high water level (U0 in FIG. 6) to be washed with water. The water level should be such that the user's body does not come in contact with water when sitting on the toilet seat.
[0013]
In normal times, the water at the initial water level L is stored in the bowl 1. This is a water level slightly higher than the predetermined low water level L0.
[0014]
During use, the water level of the bowl 1 rises due to inflow of filth, urine, and cleaning water from the toilet seat with a cleaning function (hereinafter collectively referred to as additional bowl water supply). Here, suppose that the additional bowl water supply continues for a long time.
If the water level continues to rise (section in FIG. 7A) and the force to open the on-off valve 12 by the water pressure exceeds the force to stop the water by the elastic force of the coil spring 38 at the water level MU, FIG. As shown in the figure, the on-off valve packing 40 provided on the on-off valve 12 is slightly separated from the terminal opening 42, and drainage of the water stored in the bowl 1 begins. Then, the force in the opening direction due to the increase in the water level of the stored water balances the force in the closing direction by the coil spring 38 shown in FIG. 8C, and the opening degree of the gap between the on-off valve 12 and the terminal opening is determined. The drainage flow rate of the stored water discharged through the water is determined. At this time, as shown in FIG. 8A, the concave cam 34 rotates in the illustrated direction in accordance with the opening of the on-off valve 12. However, in this rotational direction, the concave cam 34 does not contact the convex cam 33. Since it is rotatable in a non-connected state with the motor 33 and is not affected by the static torque of the motor 35, the water level adjustment is stabilized.
While the opening of the on-off valve is small and the flow rate of the additional bowl water supply exceeds the drainage flow rate of the stored water in the bowl 1, the water level continues to rise (section B in FIG. 7). As the water level rises, the opening of the on-off valve increases, and the drainage flow rate of the stored water increases.
When the water level of the bowl 1 reaches a certain water level U, the flow rate of the additional bowl water supply and the drainage flow rate of the stored water become equal, and the increase in the water level of the bowl stored water stops (section 7C). Hereinafter, this water level U is referred to as an equilibrium water level U.
Next, when the additional bowl water supply is stopped, the drainage of the bowl water continues for a while and falls to the water level ML (section 7D). When the force for opening the on-off valve 12 due to water pressure at the water level ML is less than the force for closing the on-off valve 12 by the elastic force of the coil spring 38 to stop water, the drainage stops and the descent of the water level stops ( FIG. 7E section).
[0015]
FIG. 9 shows the results of testing the relationship between the flow rate of the additional bowl feed water and the equilibrium water level U in this example. As shown in FIG. 9, when the flow rate of the additional bowl feed water is smaller than 2 L / MIN, the equilibrium water level U tends to increase as the flow rate of the additional bowl feed water increases. However, when the flow rate of the additional bowl water supply is greater than 2 L / MIN, the equilibrium water level U is about 125 mm, and no increase in the equilibrium water level U is observed. Therefore, by adopting the structure of the present embodiment, it is possible to set the equilibrium water level U so that the predetermined high water level U0 is not exceeded even if the flow rate of waste water such as filth, urine, and toilet seat with a cleaning function varies. It is.
[0016]
10, 11, 12, and 13 are a state in which the on-off valve is closed, a state in which the on-off valve is in the middle of opening, a state in which the on-off valve is fully opened, and a state in which the on-off valve is in the middle of closing, The positional relationship of a cam part and a spring part is shown. 10, (A), (B), and (C) in FIGS. 10, 11, 12, and 13 correspond to views A, B, and C in FIG. The operation of the on-off valve, cam portion, and spring portion when the on-off valve opens and closes during cleaning will be described with reference to these drawings.
[0017]
Prior to cleaning, as shown in FIG. 10, the on-off valve 12 closes the terminal opening 42 of the valve case 15. At this time, the elastic force of the coil spring 38 acts as the closing force.
[0018]
The operation of opening the on-off valve 12 during cleaning will be described with reference to FIG. In response to an electric signal from a control device (not shown), the convex cam 33 rotates in the direction shown in the figure as the motor 35 rotates in the forward direction, and the concave cam 34 is moved from the position where the convex and concave portions are engaged. At the same time, the rotation shaft 31 also rotates, and the on-off valve 12 opens and drainage begins. At this time, the elastic force of the coil spring 38 works in the direction of closing the on-off valve 12, but the driving force of the motor 35 is larger, and the on-off valve 12 is forcibly opened against the elastic force of the coil spring 38. You are in a state.
[0019]
When the rotation of the motor 35 further proceeds, the convex cam 33 hits the stopper 41 as shown in FIG. 12, where the forward rotation of the motor 35 is stopped. At this position, the on-off valve 12 is fully opened.
Even at this position, the elastic force of the coil spring 38 works in the direction of closing the valve, but the on-off valve 12 is kept fully open by the static torque of the motor 35.
Further, at this position, the coil spring 38 has the maximum elongation and the maximum elastic force, but the component force in the rotational direction for rotating the lever 32 is small because of the positional relationship between the lever 32 and the pivot shaft 31. Thus, the force for closing the on-off valve 12 is small. Therefore, it can be held with a relatively small force such as a static torque.
[0020]
Next, the operation of closing the on-off valve 12 will be described with reference to FIG. When an electric signal from a control device (not shown) is received and the motor 35 rotates in the reverse direction shown, the convex cam 33 also rotates in the reverse direction. At this time, the concave cam 34 is urged in the direction shown by the elastic force of the coil spring 38. Therefore, while the concave cam 34 is in contact with the convex cam 33, the concave cam 34 is rotated in accordance with the rotation of the convex cam 33, and the on-off valve 12 is closed.
[0021]
When the motor 35 is further reversed, the on-off valve 12 hits the terminal opening 42 of the valve case 15 as shown in FIG. 10 and closes in a state of being biased by the terminal opening 42 by the elastic force of the coil spring 38. . On the other hand, after the convex cam 33 rotates to a position where it hits the stopper 41, the reversal of the motor 35 is stopped. Thereby, the on-off valve 12 completes a series of opening / closing operations.
[0022]
FIG. 14 is a sectional view and a partially cutaway side view showing a second embodiment of the flush toilet of the present invention.
In the flush toilet in the example of FIG. 14, the valve case 15 is connected to the lower side of the drain port 5, and the terminal opening 42 inside the valve case 15 is also open on a horizontal surface. Therefore, the on-off valve 12 is also installed so as to close it horizontally. Other parts are the same as those in the first embodiment shown in FIG. Also in this example, the effect of the present invention can be obtained, and the draining direction of the bowl 1 is not limited to the first embodiment.
[0023]
FIG. 15 is a sectional view and a partially cutaway side view showing a third embodiment of the flush toilet of the present invention.
The flush toilet in the example of FIG. 15 includes a weight 43 as a hydraulic resistance means. The gravity of the weight 43 urges the on-off valve 12 to always close, and the water level in the bowl 1 can be adjusted by balancing the water pressure of the bowl 1.
[0024]
The present invention is not limited to the above embodiments, for example, the water level regulatory unit in addition to the water pressure resistance means, the water level the regulatory in the bowl is opened and closed-off valve by detecting the water level and the water pressure in the bowl May be. The hydraulic resistance means may be one that uses an elastic force such as a spring, one that uses the gravity of a weight, or one that uses the magnetic force of a magnet. Further, the non-connecting mechanism may be mechanically disconnected such as a cam mechanism, or may be switched between connected and disconnected in conjunction with the driving of the motor. Further, the drainage driving means may forcibly open and close the on-off valve manually.
Further, a pulverization pumping device can be provided inside the valve device using the space behind the flush toilet bowl. Thereby, the conveyance performance of waste water can be improved.
[0025]
【The invention's effect】
As described above in detail, according to the present invention, it is not necessary to separately provide an overflow drain pipe by discharging the excess water of the bowl from the on-off valve and adjusting the water level. The clogging does not occur. In addition, because of the drainage system using the on-off valve, it is possible to suppress noise during washing and drainage, and to provide a flush toilet with stable washing performance without returning filth and washing water.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view and a partially cutaway side view of a first embodiment of a flush toilet according to the present invention.
FIG. 2 is a front view of the valve device in the first embodiment of the flush toilet of the present invention.
FIG. 3 is a right side view of the valve device in the first embodiment of the flush toilet of the present invention.
FIG. 4 is a left side view of the valve device in the first embodiment of the flush toilet of the present invention.
FIG. 5 is an exploded perspective view of a cam portion in the first embodiment of the flush toilet of the present invention.
FIG. 6 is a view showing a bowl water level in the first embodiment of the flush toilet of the present invention.
FIG. 7 is a diagram showing a state of time displacement of the bowl water level in the first embodiment of the flush toilet of the present invention.
FIG. 8 is a diagram showing a positional relationship among an on-off valve, a cam portion, and a spring portion when draining bowl water in the first embodiment of the flush toilet according to the present invention.
FIG. 9 is a diagram showing the results of testing the relationship between the flow rate of additional bowl feed water and the equilibrium water level in the first embodiment of the flush toilet of the present invention.
FIG. 10 is a diagram showing a positional relationship between the on-off valve, the cam portion, and the spring portion when the on-off valve is closed in the first embodiment of the flush toilet of the present invention.
FIG. 11 is a view showing the positional relationship between the on-off valve, the cam portion, and the spring portion when the on-off valve is in the middle of opening in the first embodiment of the flush toilet of the present invention.
FIG. 12 is a view showing the positional relationship between the on-off valve, the cam portion, and the spring portion when the on-off valve is fully opened in the first embodiment of the flush toilet of the present invention.
FIG. 13 is a view showing the positional relationship between the on-off valve, the cam portion, and the spring portion when the on-off valve is in the middle of closing in the first embodiment of the flush toilet of the present invention.
FIG. 14 is a sectional view and a partially cutaway side view showing a second embodiment of the flush toilet of the present invention.
FIG. 15 is a sectional view and a partially cutaway side view showing a third embodiment of the flush toilet of the present invention.
FIG. 16 is a sectional view and a partially cutaway side view showing an embodiment of a conventional flush toilet.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Bowl 2 ... Rim part 3 ... Water passage 5 ... Drain port 6 ... Spray hole 10 ... Drain pipe 12 ... Opening valve 13 ... Drain port 15 ... Valve case 16 ... Packing 25 ... Overflow drain pipe 26 ... Solenoid valve 31 ... times Moving shaft 32 ... Lever 33 ... Convex cam 34 ... Concave cam 35 ... Motor 36 ... Motor drive shaft 37 ... Bracket 38 ... Coil spring 40 ... On-off valve packing 41 ... Stopper 42 ... End opening 43 ... Weight 44 ... Valve device 45 ... Water supply pipe 46 ... Control device 47 ... Protrusions

Claims (3)

A valve case having a terminal opening communicating with the drain at the bottom of the bowl;
An on-off valve that forms water in the bowl by closing the terminal opening;
Drainage driving means for opening and closing the on-off valve by driving a motor ;
Water level adjusting means for maintaining the water level in the bowl within a certain range ,
In the flush toilet equipped with a valve device that is a water pressure resistance means that urges the water level adjusting means against the water pressure of the bowl water level and biases the opening and closing valve ,
The valve device is
The drive shaft of the motor and the rotation shaft fixed to the on-off valve are arranged coaxially,
When the motor is not operated, the drive shaft and the rotation shaft are in a disconnected state, and the on-off valve is rotatable in a state of being biased in a closing direction,
A flush toilet , wherein when the motor is operated, the drive shaft and the rotation shaft are connected to rotate the rotation shaft in accordance with the rotation of the drive shaft . Before SL comprises a concave cam fixed to the pivot shaft of the opening and closing valve, and a convex cam fixed to the drive shaft of the motor,
When the motor is not in operation, the concave cam and the convex cam are not engaged with each other,
During operation of the motor, flush toilet bowl according to claim 1, characterized in that the coupling state meshed with the concave cam and the convex cam. It said hydraulic resistance means includes a lever portion which is fixed to the rotation shaft of the opening and closing valve, according to claim 1 or 2, characterized in that a coil spring is engaged at both ends to the valve case and the lever portion The flush toilet described.

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