JP4613792B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet, and more particularly to a technique for minimizing pressure fluctuations in an external drain pipe when a plurality of toilet bowls are washed at substantially the same time.

  Conventionally, in multi-storey buildings such as buildings and condominiums, drainage from each trap unit such as toilets, bathtubs, kitchen sinks, washstands, washing pans, etc. installed on each floor is piped to a common drainage horizontal pipe. Further, it is generally known that water is drained into a sewage main pipe through a drainage stack by a natural flow method (see, for example, Patent Document 1).

  In the conventional example shown in the above-mentioned Patent Document 1, if a plurality of toilets are washed almost simultaneously, the drainage from each trap portion will flow into the common drainage horizontal draw pipe at once. As a result, negative pressure is generated in the drainage horizontal pipe and the pressure fluctuation increases, so that other drain traps connected to the same drain horizontal pipe (for example, the drain trap of the washing pan) will be sealed, There is a possibility that the squirting phenomenon occurs in which water flows back through the drain trap.

Therefore, in the course of reaching the present invention, the present inventors reduced the total amount of wash water supplied from the low tank into the toilet as a means for reducing the load on the external drain pipe, We considered a method to adjust the negative pressure by reducing the total water volume, such as by throttle the water supply valve. However, in this method, although the total amount of water is reduced, the pressure fluctuation in the external drainage pipe cannot be sufficiently suppressed during toilet flushing.
Japanese Patent Laid-Open No. 11-152783

  The present invention has been invented in view of the above-mentioned conventional problems, and can suppress pressure fluctuations in the external drain pipe due to toilet cleaning operations, even when a plurality of toilet cleaning operations are performed almost simultaneously. Another object of the present invention is to provide a flush toilet that is capable of preventing the occurrence of the occurrence of out-of-sealing or squirting phenomenon in other drain traps.

The present invention for solving the above problem is, since the accumulated and cleaning water supply means for supplying cleaning water into the toilet bowl 1, the accumulated water 3 to the toilet bowl 1 is provided on the wall lower side after the above toilet 1 a trap portion 4, the flush toilet bowl having a discharge control means 6 for draining accumulated water 3 in the toilet bowl 1 to the external drainage pipe 7 during toilet flushing, the discharge control means 6, the trap portion 4 And a control circuit 6a with a built-in timer 11 for time-controlling the motor 9, and an operation signal from the washing operation unit 12 is input to the control circuit 6a when the toilet bowl is washed. Then, the control circuit 6a temporarily performs a preliminary discharge for discharging a part of the water stored in the toilet in advance by slightly rotating the trap portion 4 downward M1 for a preset time by the timer 11. Run and then trap 4 temporarily stopping state, further the predetermined time has passed after the preliminary discharge, characterized by being configured to perform the discharge for discharging the remaining reservoir water by rotating again downwardly M the trap portion 4 It is said.

  Thus, by performing preliminary discharge to reduce the capacity of the stored water 3 in the toilet 1 in advance prior to toilet flushing, it is possible to reduce the instantaneous drainage during toilet flushing, and thereby the negative pressure in the external drain pipe 7 can be reduced. Occurrence can be suppressed, and it becomes possible to prevent other drain traps from running out of water due to pressure fluctuations or the occurrence of jetting.

  The external drain pipe 7 is preferably composed of a common drain horizontal pipe 7a to which the trap portions 4 of the plurality of toilets 1 are respectively connected. In this case, a plurality of toilet flushing operations are performed almost simultaneously. Even in this case, since the instantaneous discharge amount at the time of toilet cleaning can be reduced for each toilet 1, pressure fluctuations in the drainage horizontal pipe 7 a can be suppressed, which is suitable for a building such as an apartment house. .

  The external drainage pipe 7 is preferably composed of a common drainage stack 7b to which the trap portions 4 of the plurality of toilets 1 respectively installed on the upper and lower floors of a multi-story building are connected. Even when the toilet cleaning operation is performed almost simultaneously on each floor, the instantaneous discharge amount on each floor can be reduced, so that the pressure fluctuation in the drainage stack 7b can be suppressed, which is suitable for a multi-story building. It becomes.

  The present invention performs a two-stage operation of a preliminary discharge for discharging a part of the water stored in the toilet in advance during toilet flushing and a main discharge for discharging the remaining stored water after a predetermined time has elapsed since the preliminary discharge. By providing this drainage control means, it is possible to easily suppress the generation of negative pressure in the external drainage pipe during toilet flushing, and adverse effects due to pressure fluctuations in the external drainage pipe, for example, the closure of other drain traps or ejection The effect of preventing the occurrence of the phenomenon is obtained.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  FIG. 1 shows an example of a turn trap type toilet 1A, and FIG. 2 shows a block diagram of drainage control means 6 provided in the toilet 1A.

  The turn trap type toilet 1A includes a toilet 1 having a bowl portion 5, a low tank 8 (FIG. 5) for supplying flush water to the toilet 1, and a rear wall lower side in the toilet 1. A movable trap portion 4 (hereinafter referred to as “turn trap portion 4”) for storing a certain amount of water 3 (sealed water), and an external drain pipe 7 (see FIG. 2) is provided with a control circuit 6a for draining.

  By the way, conventionally, when flushing toilet bowl, as shown in FIG. 8 (a) → (b), the water trap 3 is drained to the external drain pipe 7 at once by rotating the turn trap portion 4 downward. There is a possibility that a load is applied to the external drainage pipe 7 when the amount of instantaneous discharge increases, and particularly when a plurality of toilet bowls 1 are washed almost simultaneously. FIG. 9 is a conventional time chart. In FIG. 9, A indicates a time for rotating the turn trap portion 4 downward, and B indicates a time for rotating the turn trap portion 4 upward.

  Therefore, in the present invention, the drainage control means 6 includes a preliminary discharge mode in which a part of the stored water 3 in the toilet 1 is discharged in advance, and a main discharge mode in which the remaining stored water 3 is discharged after a predetermined time has elapsed since the preliminary discharge. The two-stage operation is executed.

  In the example shown in FIG. 2, a motor 9 that rotates the turn trap unit 4 up and down, a detection sensor 10 that detects the uppermost position and the lowermost position of the turn trap unit 4, and a detection signal from the detection sensor 10. And a control circuit 6a having a built-in timer 11 for controlling the time of the motor 9. When an operation signal from the cleaning operation unit 12 is input to the control circuit 6a, the control circuit 6a temporarily rotates the turn trap unit 4 slightly downward M1 for a preset time by the timer 11. As a result, as shown in FIG. 1B, only a part of the stored water 3 is discharged, and the capacity of the stored water 3 in the toilet 1 is reduced by the capacity indicated by E. Thereafter, the drain trapping is temporarily stopped by keeping the turn trap portion 4 upward, and the main discharge is performed after a predetermined time has passed. That is, by rotating the turn trap part 4 downward M again, as shown in FIG.1 (c), the remaining stored water 3 is discharged | emitted with filth, and toilet bowl washing is performed. Here, a time chart in the case of performing preliminary discharge and main discharge by controlling the rotation time of the turn trap section 4 in FIG. 3, A1 and A2 in the figure rotate the turn trap section 4 downward. B, the time for rotating the turn trap portion 4 upward, and C the time for temporarily stopping drainage. By adjusting the downward time (time C shown in FIG. 3) of the turn trap portion 4 at the time of preliminary discharge, the amount of drainage for preliminary discharge can be easily adjusted.

  Thus, before the toilet bowl is cleaned, the instantaneous discharge amount at the time of the main discharge can be reduced by performing the discharge to reduce the capacity of the stored water 3 in the toilet bowl 1 in advance. Therefore, for example, in a multi-storey building such as a building or a condominium, the external drain pipe 7 is a common drain horizontal pipe 7a to which the trap portions 4 of the plurality of toilets 1 are respectively connected, or the upper and lower floors. In the case where each trap section 4 of the plurality of toilet bowls 1 is a common drainage stack 7b connected to each other, even when a plurality of toilet bowl washing operations are performed almost simultaneously, By reducing the instantaneous discharge amount respectively, it is possible to suppress the generation of negative pressure in the external drain pipe 7, and adverse effects due to pressure fluctuations, for example, other drain traps connected to the common external drain pipe 7 (for example, It is possible to prevent the occurrence of the occurrence of a water seal spill or a squirting phenomenon.

  In addition, although FIG. 3 illustrates an example of a time control method for performing the temporary drainage operation by controlling the rotation time of the turn trap unit 4, as another embodiment, the turn trap unit 4 is directed upward and downward. It is also possible to adopt a position detection control method in which a temporary drainage operation is performed by detecting a lateral position between the two. An example is shown in the time chart of FIG. When an operation signal from the cleaning operation unit 12 is input to the control circuit 6a, the control circuit 6a rotates the turn trap unit 4 from the upward direction to the downward direction. A detection signal is sent from the sensor to the control circuit 6a, and the control circuit 6a temporarily stops the rotation of the motor 9 for a time D in FIG. Thereby, since the turn trap part 4 is temporarily fixed in a horizontal posture, only a part of the stored water 3 is discharged by overflow. Thereby, the capacity | capacitance of the stored water 3 in the toilet bowl 1 decreases by the capacity | capacitance shown by E of FIG.1 (b). Thereafter, the motor 9 is rotated again to rotate the turn trap portion 4 from the lateral direction to the downward direction, so that the main discharge for discharging the remaining stored water 3 can be performed. In this example, the turn trap portion 4 is rotated from the top to the side to perform preliminary discharge, and further rotated from the side to the bottom to perform the main discharge. Therefore, as shown in FIG. Since there is no need for a complicated operation in which the main discharge is carried out by turning down again and then rotating downward again, there is an advantage that the circuit structure of the control circuit 6a can be simplified.

  Although the turn trap type toilet 1A is illustrated in the above embodiment, the siphon type toilet 1B can execute the two-stage operation of the preliminary discharge and the main discharge. FIG. 5 shows an example of a siphon toilet 1B, and FIG. 6 shows a block diagram of the drainage control means 6. As shown in FIG.

  As shown in FIG. 7, the trap portion 4 of the siphon-type toilet 1B includes a trap inlet 21 that opens at the lower portion of the rear wall 5b of the bowl portion 5, a trap top portion 22 that is bent in a substantially inverted U shape upward, A trap outlet 23 communicating with the external drain pipe is integrally formed in a tubular shape. Further, a water discharge hole 40 is opened toward the trap inlet 21 on the side of the front wall 5a facing the rear wall 5b where the trap inlet 21 of the bowl portion 5 is provided, and is normally provided on the bottom surface of the low tank 8. A sub discharge port is opened separately from the main discharge port, and the water discharge hole 40 and the sub discharge port are disposed through a bypass pipe 13 disposed inside the toilet 1 (a space portion between the bowl portion 5 and the toilet 1 outer wall). It is connected. The sub discharge port is opened and closed by the sub electromagnetic valve 14. First, when an operation signal from the cleaning operation unit 12 is input to the control circuit 6 a, the control circuit 6 a temporarily opens only the sub electromagnetic valve 14 of the low tank 8 for a preset time by the timer 11. As a result, the wash water in the low tank 8 passes through the bypass pipe 13 and flows into the bowl portion 5 in the direction indicated by the arrow F in FIG. 5A to become jet water. A part of the accumulated water 3 is discharged to the external drain pipe.

  More specifically, in FIG. 5, when a part of the washing water 3 in the low tank 8 is ejected from the water discharge hole 40 of the toilet 1 into the bowl portion 5 through the bypass pipe 13, the jet water flows toward the trap inlet 21. At this time, a wave is generated in the stored water 3 toward the trap inlet 21 side. Part of the stored water 3 is caught in this wave and rises toward the trap top 22, and the raised water is discharged to the trap outlet 23. The amount of drainage at this time is larger than the amount of water supplied from the low tank 8, and a part of the stored water 3 in the toilet 1 is included. That is, since the amount of drainage is the sum of the amount of water from the low tank 8 and a part of the stored water 3, after the supply of water from the low tank 8 is stopped, the water level of the stored water 3 in the toilet 1 is Thus, the original water level L (FIG. 7) is reduced by the amount indicated by E in FIG. This is preliminary discharge, and the purpose is to reduce the amount of instantaneous discharge during subsequent main discharge by reducing the amount of water 3 stored in the bowl portion 5. Furthermore, it is different from normal overflow drainage and siphon drainage. Overflow drainage overflows when the accumulated water 3 in the bowl portion 5 increases, and the excess water overflows and drains, so that the amount of accumulated water before and after drainage does not change. This is a method of discharging most of the accumulated water 3 together with the filth using the pulling force generated when the drainage channel of the section is full. On the other hand, the preliminary discharge using the wave motion of the present invention is the bowl section. Since the water generated from the tank 5 is swollen together with the water supplied from the low tank 8 while the part of the water 3 in the bowl portion 5 is engulfed in the wave generated in the water, the trap top 22 is raised and drained. Although the amount of accumulated water is reduced, a certain amount of accumulated water is ensured, and in this respect, it differs from ordinary overflow drainage and siphon-type drainage.

  When the auxiliary electromagnetic valve 14 of the low tank 8 is closed and the main electromagnetic valve 15 is opened instead after the above preliminary discharge, the washing water in the low tank 8 enters the bowl portion 5 from the main discharge port to the arrow G in FIG. The water 3 in the bowl portion 5 is sucked in the direction indicated by the arrow F2 in FIG. 5B by the siphon phenomenon that occurs at this time, and the main discharge is performed. Thus, by performing preliminary discharge in advance using a part of the wash water in the low tank 8, the instantaneous discharge amount at the time of subsequent toilet cleaning can be reduced. The pressure fluctuation can be prevented, and the same effect as that of the turn trap type toilet 1A exemplified in the above embodiment can be obtained.

  As still another embodiment of the present invention, a normal cleaning mode in which preliminary discharge is not performed is provided separately from the cleaning mode in which the two-stage operation of preliminary discharge and main discharge is performed, and these modes are switched by a changeover switch. It is also possible to make it.

It is a side sectional view explaining drainage control in a turn trap type toilet used for one embodiment of the present invention, (a) shows a state before toilet bowl washing, (b) shows a state after preliminary discharge, (c ) Shows the state at the time of main discharge. It is a block diagram relevant to the waste_water | drain control means same as the above. It is a time chart at the time of performing preliminary discharge same as the above by the rotation time control system of a motor. It is a time chart at the time of performing preliminary discharge same as the above by the position control system of a turn trap part. It is side surface sectional drawing explaining the drainage control in the siphon type toilet used for other embodiment, (a) shows the state before toilet bowl washing, (b) shows the state after preliminary discharge, (c) this discharge Indicates the state of the hour. It is a block diagram relevant to the waste_water | drain control means of FIG. It is a figure explaining the drainage system using the wave of FIG. (A) (b) is explanatory drawing of the draining operation | movement in the conventional turn trap type toilet bowl. It is a time chart which shows the conventional draining operation | movement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toilet 3 Reservoir 4 Trap part 6 Drainage control means 7 External drainage pipe 7a Drainage horizontal pipe 7b Drainage standpipe

Claims (3)

A cleaning water supply means for supplying cleaning water into the toilet bowl, a trap portion for storing the accumulated water in the bowl is provided on the wall lower side after the above toilet reservoir in the bowl during the flush In the flush toilet equipped with drainage control means for draining water to an external drain pipe, the drainage control means includes a motor that rotates the trap portion up and down and a control circuit that includes a timer that controls the time of the motor. provided, when the operation signal from the washing operation portion when the toilet flushing is inputted to the control circuit the control circuit be small rotated downward only temporarily the trap unit preset time in the timer in running preliminary discharge to advance discharging a portion of the accumulated water in the bowl, then the trap portion once a stopped state, after a further predetermined time has elapsed since the preliminary discharge, down the trap portion again Flush toilet bowl, characterized in that it is configured to perform the discharge for discharging the remaining reservoir water by rotating.   2. The flush toilet according to claim 1, wherein the external drain pipe is a common drain horizontal pipe to which each trap portion of a plurality of toilet bowls is connected.   2. The flush toilet according to claim 1, wherein the external drain pipe is composed of a common drainage stack to which trap portions of a plurality of toilet bowls respectively installed on upper and lower floors of a multi-story building are respectively connected. .

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