JP2692995B2 - Toilet flushing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a toilet flushing device in which water in a cistern for flushing a toilet is opened and discharged by opening a valve.

[Prior Art] Japanese Patent Publication No. 1-333613 discloses a toilet flush device in which a valve of a discharge port for discharging water stored in a cistern is electrically operated. In the device disclosed in Japanese Patent Publication No. 1-333613, the lever 6 is rotated by a motor, and the rotation angle of the lever 6 is detected by a limit switch to control the motor. Then, the motor, the speed reducer, the limit switch, etc. are put in a case 10 composed of a case body 9a and a lid 9b.
Was installed in Sistern 2. Here, in order to prevent the motor and the limit switch from being adversely affected by moisture in the high humidity environment such as the cistern 2,
As shown in FIG. 10, the entire circumference of the case 9 was sealed in the cistern 2.

[Problems to be Solved by the Invention] However, in the case of sealing the entire case 9 as described above, a wide range of seals are required. And, in order to exhaust the heat accumulated inside, it is necessary to provide an opening 42 that opens to the outside of the cistern 2, and the opening 42 communicates with the outside air, but it can be said that there is little humidity, There is a problem that water and the like for hand washing may enter from this portion, which may adversely affect the internal motor and limit switch. Also, because it requires a limit switch,
There is a problem that the case 9 becomes larger by that amount, which hinders the arrangement of the float or the like arranged in the systern 2.

The present invention has been made in view of the above-mentioned problems of the conventional example, and an object thereof is to use only a stepping motor having a moisture-proof structure and not need a moisture-proof structure of the case. It is to provide a toilet flushing device that does not float even if water intrudes into it.

[Means for Solving the Problems] The toilet flushing device of the present invention includes a cistern 2 of a flush toilet 1.
A valve 4 that opens and closes the discharge port 3 for discharging the water stored in the systern 2, a string-like body 5 having one end connected to the valve 4, and the other end of the string-like body 5 is connected. In a toilet flushing device including a lever 6 for pulling up the cord-like body 5 and an electric drive device 7 for rotating the lever 6, the electric drive device 7 is a stepping motor having a moisture-proof structure. Structured stepping motor and speed reducer
11 is housed in a case 9 having a non-moisture proof structure, and the case 9 is arranged in the cistern 2. By adopting such a configuration, the problems of the conventional example described above are solved. It was done.

[Operation] However, since the electric drive device 7 is a stepping motor having a moisture-proof structure, it is not necessary to provide a wide range of sealing for the case 9, and the electric drive device 7 for rotating the lever 6 is a stepping motor. Therefore, it is not necessary to provide a microswitch as in the conventional case, and a space for arranging the microswitch is required, and the case 9 can be downsized accordingly. Further, the turning angle of the lever need only be adjusted by adjusting the number of pulses, so that it can be easily adjusted on site.

EXAMPLES Hereinafter, the present invention will be described in detail based on examples shown in the accompanying drawings.

The cistern 2 is for storing water flowing into the flush toilet 1, and the cistern 2 is a type attached to the rear of the flush toilet 1 as shown in FIG. Any of the given types may be used. The bottom of the cistern 2 is provided with a discharge port 3 for discharging the water stored in the cistern 2 to the flush toilet 1 as shown in FIG. The discharge port 3 is provided with a valve 4 for opening and closing the discharge port 3. The valve 4 is rotatably supported by a shaft 8 in the vicinity of the edge of the discharge port 3, and one end of a cord-like body 5 such as a wedge is connected to the end of the valve 4 opposite to the shaft supporting portion. There is. The other end of the string 5 is connected to the tip of a lever 6 for lifting the string 5. A case 9 having a non-moisture proof structure is attached to a side wall of the cistern 2, and an electric drive device 7 is internally provided in the case 9 as shown in FIGS. The drive force of the device 7 is transmitted to the lever 6 via the speed reducer 11, the lever 6 is rotated to pull up the string-like body 5, and the lever 6 is selected to rotate, thereby completely releasing the valve 4. A state in which the lever 6 is driven to a position where a large flow rate is flown and a state in which the valve 4 is released halfway to drive a lever 6 to a position where a small amount of water flows are selectable. The electric drive device 7 in the present invention is a stepping motor having a moisture-proof structure, and is attached to the case body 9a of the case 9 with screws. Then, the rotation of the output shaft 10 of the electric drive device 7 is transmitted to the lever 6 via the speed reducer 11 including a plurality of gears. In the embodiment shown in FIG. 5, the upper case body 33 is attached to the upper edge portion of the lower case body 32 in which the stepping motor is incorporated by sealing by heat welding, and the output shaft 10 is inserted into the hole 34 of the upper case body 33. Since the first shaft 37 of the reduction gear transmission 11 is connected to the output shaft 10 and there is a gap between the output shaft 10 and the O-ring 35 provided at the opening edge of the hole 34, the upper end of this gap is provided. A cylindrical packing base 35 having a collar is press-fitted into the base, a cylindrical seal packing 36 fitted on the first shaft 37 is placed thereon, and a packing cover 38
By mounting the seal packing 36 to the base plate 39 with screws 40, the seal packing 36 is pressed against the collar of the packing base 35, and the seal packing
It is designed to keep airtightness by pressing 36 to the shaft 37 most. The first shaft 37 may be connected to the output shaft 10 after the seal packing 36 is attached by the packing cover 38 and then press fit into the seal packing 36 to connect to the output shaft 10. Also, as shown in FIG. 9, in the case where the output shaft 10 is integral with the first shaft 37 and the output shaft 10 is securely sealed by the O-ring 34, the packing base 35 and the seal packing as described above are used. You don't need 36 mag. A hole 14 is bored in a receiving plate 13 provided on a pair of bosses 12 provided in the case body 9a, and the shaft portion 6a of the L-shaped lever 6 is rotatably inserted into the hole 14 of the receiving plate 13. The hole portion 18 of the final stage gear 15 of the speed reducer 11 is rotatably loosely fitted in the shaft portion 6a. Between the gear 15 and the receiving plate 13, a cylindrical body 16 serving as a spacer is rotatably loosely fitted. Here, in the embodiment of the attached drawings, the cylindrical body 16 and the final gear 15 are separate bodies, but they may be formed integrally. A cylindrical portion 17 protrudes from the surface of the final gear 15 opposite to the receiving plate 13, and a groove is provided at the bottom of the cylindrical portion 17 to form a pin engaging portion 19. A spring bearing 20 is fixed to a portion of the shaft portion 6a of the lever 6 projecting from the receiving plate 13, and the spring bearing 20 rotates together with the shaft portion 6a of the lever 6. A spring member 21 is provided between the receiving plate 13 and the spring receiver 20. This spring material 21 is composed of a coil spring, and one end of the coil spring is
21a is locked to a locking portion 22 provided on the receiving plate 13, and the other end 21b of the coil spring is locked to a locking portion 23 of the spring receiver 20. A pin 24 is attached to the shaft portion 6a, and the pin 24 is normally engaged with the pin engagement portion 19. In this engagement state, the shaft member 6a is attached to the shaft portion 6a by the spring member 21 as shown in FIGS. It is kept by the bias of the spring force that moves in the direction of arrow a. A spring spring 20 is biased in one direction by locking both ends of a spring member 21 made of a coil spring. When the lever 6 rotates in the direction to open the valve 4, the spring member 21 is rotated.
The spring force for rotating the lever 6 in the closing direction of the valve 4 is accumulated. The shaft 6a of the lever 6 rotatably penetrates the hole 25 of the lid 9b of the case 9, and rotatably penetrates the hole 26 of the case body 9a. Case body 9a
The case 9 configured by attaching the lid 9b to the case has a non-moisture proof structure. Therefore, the seal at the joint between the case body 9a and the lid 9b, the moisture proof treatment for the holes 24 and 25, the electric cord 41, etc.
It is not necessary to perform moisture-proof treatment or the like on the portion drawn out from the case 9.

By the way, the electric drive device 7 including a stepping motor sends a control signal from the control unit 27 to the drive unit 28 as shown in FIG. It is adapted to drive the device 7. In FIG. 8, reference numeral 29 denotes a toilet seat switch, and reference numeral 30 denotes an operation switch. The toilet seat switch 29 is turned on when a person sits on the toilet seat, and turned off when a person stands on the toilet seat. The operation switch 30 is a switch that is attached to, for example, a wall and is unrelated to the toilet seat switch 29.

String-like body 5 such as type of cistern 2, construction conditions, borehole, etc.
Since the rotation angle of the lever 6 and the degree of rise of the valve 4 are different at each site due to the tension, etc., the tension of the string-like body 5 is adjusted at the site, but this alone is not sufficient, so the electric drive device at the site The number of pulses for controlling the rotation angle of the stepping motor, which is 7, is adjusted to a predetermined rotation angle on site.

Then, when a person sits down on the toilet seat, the toilet seat switch 29 is turned on as shown in FIG. 6, the stepping motor rotates in the forward direction, and the lever 6 rotates through the reduction gear 11 in the forward rotation direction by a certain angle (in this case, , Pin engagement of the final stage gear 15 of the reduction gear 11
The pin 24 provided on the shaft portion 6a of the lever 6 is elastically engaged with the spring member 21 and engaged with the shaft 19 so that the rotation of the gear 15 can be transmitted as the rotation of the lever 6). , The lever 6 is rotated in the forward direction by a certain angle to pull the string-like body 5 and stopped in a state of being rotated by the certain angle, and the valve 4 is opened in a half-opened state as shown in FIG. A small amount of stored water in 2 is discharged from the discharge port 3 to pre-clean the inside of the flush toilet 1. After a lapse of a certain time, the stepping motor rotates in the reverse direction, and the lever 6 rotates in the reverse direction by a certain angle, returns to the initial state, and stops. In this case, when the string-like body 5 is loosened, the valve 4 in the half-open state is sucked by the suction force of the water flow flowing from the discharge port 3, and the valve 4 rotates to the state shown in FIG. And the outlet 3 is closed. Here, when a small volume of water used by the pre-cleaning is released, the water level in the cistern 2 is reduced by that amount, and only the reduced amount is automatically supplied by a water supply device (not shown). You. Next, after a lapse of an arbitrary time, when standing up from the toilet seat, the toilet seat switch 29 is turned off, and at the same time, the stepping motor rotates in the forward rotation direction to rotate the lever 6 in the forward rotation direction and pull the string-like body 5 to pull the valve. When the valve 4 is rotated to the fully opened state as shown in FIG. 2B and the valve 4 is rotated to the fully opened state, the stepping motor reversely rotates and the lever 6 reversely rotates to the initial position. When the valve 4 is in the fully open state as shown in FIG. 2 (b), the valve 4 releases the stored water in the cistern 2 by discharging the water similarly to the conventional valve provided in the cistern 2 of this type. Maintain liberation by themselves. In this way, the stored water in the cistern 2 is completely discharged and the inside of the flush toilet 1 is washed with a large amount of water. However, when the stored water in the cistern 2 is completely discharged, the water flow between the valve 4 and the discharge port 3 is small. Then, the valve 4 is closed by its own weight as shown in FIG. 2 (a), and the water storage in the systern 2 is started again.

On the other hand, when urinating, as shown in FIG.
Is operated to turn on, the stepping motor rotates forward, and the lever 6 rotates by a predetermined angle in the forward rotation direction.
Is rotated in the forward direction by a constant angle, the string-shaped body 5 is pulled and stopped in a state rotated by a constant angle, and the valve 4 is opened to a half-open state as shown in FIG. The stored water is discharged from the discharge port 3 by a small volume to wash the inside of the flush toilet 1, and after a certain period of time, the stepping motor reversely rotates and the lever 6 rotates a predetermined angle in the reverse direction to return to the initial state and stop. In this case, when the string-like body 5 is loosened, the valve 4 in the half-open state is sucked by the suction force of the water flow flowing from the discharge port 3, and the valve 4 rotates to the state shown in FIG. And the outlet 3 is closed. Here, when a small amount of water used by the washing is released, the water level in the cistern 2 is reduced by that amount, and only the reduced amount is automatically supplied by a water supply device (not shown). .

By the way, when the electric driving device 7 is stopped due to a power failure or the like while the electric driving device 7 is being driven to rotate the lever 6, the lever 6 is stopped, and the string 5 is pulled by the lever 6 to make the valve 4. Is stopped in the open state, the water stored in the cistern 2 is discharged from the discharge port 3 and the water level decreases, so that water is continuously supplied from the water supply device and flows away. In such a case, if the portion of the shaft 6a of the lever 6 protruding from the case 9 is pushed, the shaft 6a
Is pressed against the spring force of the spring member 21 to disengage the pin 24 from the pin engaging portion 19 and the lever 6 is rotated by the rotating force of the spring member 21.
Rotates to the initial position, and the stopper provided on the case body 9a
31 stops at the initial position, and when the lever 6 rotates to the initial position, the string-shaped body 5 pulled by the lever 6
When the valve 4 is half-opened, it rotates by the water flow, and when the valve 4 is fully opened, it turns by its own weight to close the discharge port 3.
Here, when the lever 6 returns to the initial position, the pin 24 provided on the lever 6 also returns to the initial position. In this state, since the pressing of the shaft portion 6a is released, the pin 24 resiliently contacts the pin engagement portion 19 at the bottom of the cylindrical portion 17 of the final gear 15 due to the spring force of the spring material 21. ing. Next, when the power failure ends, the stepping motor is set to rotate in the reverse direction (for example, 180 ° reverse rotation) so that the stepping motor rotates in the reverse direction and the pin at the bottom of the cylinder part 17 provided in the final stage gear 15 twenty four
The gear 15 rotates in a state in which the gear 15 is in elastic contact with the gear, and the gear 15 stops when the pin engaging portion 19 engages with the pin 24. Thus, the initial state is set.

The case 9 is mounted inside the cistern 2 so as not to be exposed to the outside, and the tip of the shaft portion 6a of the lever 6 is located in the hole provided in the cistern 2 or slightly protrudes from the hole. From outside the shaft 6a
The end of the can be pressed directly or through a jig.

In the above-described embodiment, it is possible to select a case where a large amount of water is discharged from the cistern 2 during stool cleaning and a case where a small amount of water is discharged from the cistern 2 during urine cleaning. Although the stepping motor is controlled, only a large amount of water may be discharged from the cistern 2.

EFFECTS OF THE INVENTION In the present invention, as described above, the electric drive device is a stepping motor having a moisture-proof structure, and the stepping motor having the moisture-proof structure and the speed reducer are housed in a case having a non-moisture-proof structure. Since it is located in the cistern, there is no need to provide a microswitch as in the conventional case, and there is no need for a space for locating the microswitch, and the case can be downsized accordingly and the case can be placed in the cistern. This can be done as a hindrance to the arrangement of the float and the like, and the adjustment of the rotation angle of the lever only requires adjustment of the pulse and the like, so that it can be easily adjusted on site.

[Brief description of the drawings]

FIG. 1 is an overall side view of the present invention, and FIGS. 2 (a) and 2 (b).
(C) is an explanatory view of a fully closed state of the valve, a fully opened state releasing a large amount of water, and a half opened state releasing a small amount of water, and FIG. 3 is an electric drive device, a speed reducer, a lever, etc. of the same. 4 is an exploded perspective view of the same, FIG. 4 is a plan view with the lid removed, FIG. 5 is a side sectional view of the same, and FIG. 6 is an operation explanatory view of a toilet seat switch, a stepping motor and a lever at the time of stool,
FIG. 7 is a diagram for explaining the operation of the operation switch, the stepping motor and the lever at the time of urination, and FIG. 8 is a block diagram for explaining the control of the electric drive device of the invention.
The figure is a schematic cross-sectional view of another embodiment of the electric drive system of the present invention,
FIG. 10 is a schematic cross-sectional view of a conventional case in a mounted state, where 1 is a flush toilet, 2 is a cistern, 3 is a discharge port,
4 is a valve, 5 is a string, 6 is a lever, 7 is an electric drive device,
Reference numeral 9 is a case, and 11 is a speed reducer.

Claims (1)

(57) [Claims] 1. A valve in a cistern of a flush toilet for opening and closing a discharge port for discharging water stored in the cistern, a string-like body having one end connected to the valve, and the other end of the string-like body. In a toilet flushing device composed of a lever for pulling up the cord-like body and an electric drive device for rotating the lever, the electric drive device is a stepping motor having a moisture-proof structure, A toilet flushing device in which a stepping motor and a speed reducer are housed in a case having a non-moisture proof structure, and the case is arranged in a cistern.