JP2003321863A - Low-tank drain valve and auxiliary operation device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-tank drain valve which allows an operation part to be easily operated with a weak force, and enables an auxiliary operation part for the low-tank drain valve to be arranged in an arbitrary position in a free direction. <P>SOLUTION: This low-tank drain valve is equipped with an inner sleeve whose upper end is provided with the operation part for cleaning and which is vertically driven so as to realize a valve opening/closing operation. An auxiliary operation device, which is provided above a casing, is composed at least of an actuator shaft, a rotating arm which is journaled on the actuator shaft, and a rotary actuator which is arranged so that a driving force can be transferred to the actuator shaft in such a manner that the rotating arm is moved so as to be freely rotatable in a normal/reverse direction. The auxiliary operation part for the rotary actuator is provided; and when the auxiliary operation part is operated to drive the rotary actuator and rotate the rotating arm, the valve opening operation is realized by virtue of the upward drive of the inner sleeve which is brought into continuous contact with the operation part. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low tank drain valve provided in a flush water tank of a toilet bowl.

[0002]

2. Description of the Related Art Conventionally, a dual flush valve type low tank drain valve has been used for a flush water tank of a toilet bowl. This dual flush valve type low tank drain valve is built in the washing water tank and has operation buttons for small washing and large washing arranged on the surface of the washing water tank. Examples of such a dual flush valve type low tank drain valve include those described in, for example, U.S. Pat. No. 5,657,494 and U.S. Pat. No. 6,081,938. The low tank drain valve described in these specifications has an operating part at the upper end, a casing having the lower end communicating with a tank drain, and an inner sleeve having a float and a valve element at the lower end. The sleeve is also characterized as an overflow drain pipe. Further, as a low tank drainage valve in consideration of the operation of the operation portion, a solenoid valve is used to lift the valve body in the cylinder to perform the drainage operation, for example, JP-A-55-92438 and US Pat. No. 263,519, or by using air pressure to lift a valve element in a pipe to perform a drainage operation, for example, US Pat.
There is also an example of an automatic cleaning valve described in 4,015. Another example is a low tank drain valve that is remotely controlled using steel wires.

[0003]

However, in the low tank drainage valve having a mechanism for opening and closing the valve body by moving the valve body in the vertical direction as in US Pat. No. 5,657,494, an auxiliary operation thereof is required. Since the section is arranged above the low tank drain valve and the operation section at the upper end of the casing that is connected to the auxiliary operation section through the rod is provided, the auxiliary operation section can be arranged in any direction and at any position. Was difficult.

On the other hand, in the low tank drainage valve aiming at remote control such as Japanese Patent Laid-Open No. 55-92438, when a solenoid valve is used as a driving means, a valve body with a head of washing water accumulated in the low tank is applied. It is necessary to generate a large force to operate the. Therefore, it is necessary to enlarge the solenoid valve itself in order to drive it by the solenoid valve. Therefore, the solenoid valve is larger than the low tank drain valve, and it is difficult and unstable to install the solenoid valve in the low tank drain valve. In addition, it could not be stored in the wash water tank, which was difficult to realize. In particular, since the solenoid valve moves the shaft to the upper limit and the valve body opens the shaft by the shaft, it is necessary to secure a stroke length for moving the shaft up and down, which makes it difficult to mount the shaft in the raw tank.

When such an electromagnetic valve is used, it is desirable to provide a manual operation means as a backup means in case the electromagnetic valve fails. However, when this solenoid valve is used, it is difficult to easily incorporate the auxiliary operation means by mounting the solenoid valve on the upper end of the low tank drain valve, and the structure is complicated to realize and the high humidity is required. In the low tank, it may lead to malfunction.

Further, in a low tank drain valve using a steel wire or the like as a remote control means, since the low tank drain valve is housed in a narrow washing water tank, if the wire is forcibly bent and assembled, the torque transmission performance of the wire will be improved. Since it will be drastically reduced and it will not be possible to drive,
The operating portion could be arranged only at a position where the wire was not bent as much as possible.

Therefore, the present invention is to provide a compact low tank drain valve which can be housed in a low tank. It is an object of the present invention to provide a low tank drain valve which can operate the operating portion with a small force particularly easily and which can arrange the auxiliary operating portion of the low tank drain valve in any direction and in any position. It is another object of the present invention to provide a low tank drainage valve operating device which is compact and can be easily attached to a conventional low tank drainage valve afterwards.

[0008]

According to claim 1 of the present invention, there is provided a casing in which an operating portion for cleaning is provided at an upper end and a lower end communicates with a drain, and the drain in the casing. A low tank drainage valve including a valve body seated on a valve seat provided in a cylinder, and a float above the valve body, and an inner sleeve that is vertically driven to realize a valve opening / closing operation. Above the casing, at least an actuator shaft, a rotary arm pivotally attached to the actuator shaft, and a rotary type arranged to transmit a driving force to the actuator shaft so that the rotary arm can rotate forward and backward. The rotary actuator includes an auxiliary operating device including an actuator, and an auxiliary operating section for operating the rotary actuator, and the rotary operating unit is operated by operating the auxiliary operating section. When the rotary arm is rotated by driving the actuator and transmitting the driving force, the operating portion is operated by the rotated rotary arm, and the inner sleeve connected to the operating portion is driven upward so that the valve is opened. A low tank drain valve that is characterized by achieving operation.

By operating the operating portion using the rotary arm in this way, the movable height of the rotary arm can be kept lower than the actuator shaft that rotates the rotary arm. The height of can be lowered. Therefore, this auxiliary operating device can be arranged in a narrow gap between the tank lid and the casing. In addition, this operation part may be operated by being pushed down or by being pulled up.

In addition, the prior art (US Pat.
No. 57,494) attached to a dual flush valve type low tank drain valve, this push button type auxiliary operating unit placed on the low tank is connected to this rod so as not to interfere with the rod abutting the operating unit. The auxiliary operating device can be arranged above the casing. That is,
Since it is the rotating arm that operates the operating unit, it suffices if this rotating arm is placed above the operating unit, and the rotary actuator body that transmits the driving force by the actuator shaft is placed so as to be displaced from above the casing. Therefore, the rod and the rotating arm can be arranged above the operating portion so as not to interfere with each other. Therefore, the vertical drive of either the rotary arm of the rotary actuator or the rod extending from the push button auxiliary operation unit can be reliably transmitted to the operation unit. Therefore, it is possible to easily operate the operation unit with a small force for infants and elderly people who can not take an unreasonable posture, and even when the motor cannot be driven due to power failure or failure, the push button auxiliary operation unit can also be used. A drainage operation can be realized, and a stable drainage operation can be realized.

According to a second aspect of the present invention, the rotary actuator includes a motor and a reduction gear that reduces the rotation of the motor and transmits the reduced rotation to the actuator shaft. It was used as a low tank drain valve.

In the present invention, the operation portion can be operated with high torque by using the reduction gear.
Therefore, a small motor can be used to drive the rotary actuator, and the auxiliary operating device itself can be made compact. Especially, when the conventional solenoid valve is used, the driving force of the solenoid valve is directly transmitted to the drain valve in order to open the drain valve with the head open.
Although it was necessary to increase the size of the solenoid valve itself to secure the driving force, it is possible to operate with high torque by using the motor having the rotating arm and the reduction gear as in the present invention.

According to a third aspect of the present invention, the low tank drain valve according to the first or second aspect is characterized in that the rotating arm has a V shape.

In the present invention, since the rotary arm has the V-shape, the rotary motion region drawn by the tip of the rotary arm is further reduced, so that the rotary actuator can be installed more compactly on the upper end of the casing.

According to a fourth aspect of the present invention, the motor and the reduction gear of the rotary actuator have a waterproof structure, and this waterproof structure is provided on the outer peripheral portion of the fixed portion of the motor body and the rotating portion of the motor shaft. The low tank drainage valve according to claim 2, wherein the low tank drain valve is characterized in that it is sealed by straddling a shaped elastic body and fixing both ends of the elastic body to respective portions.

In the present invention, in the waterproof structure, a bellows-shaped elastic body is stretched around the fixed portion of the motor body and the outer peripheral portion of the rotating portion of the motor shaft to fix both ends of the elastic body to the respective portions. Completely encloses the contact part (sealing target part) between the motor body and the motor shaft, but since the rotating part of the motor shaft repeats forward and reverse rotation within a range of 90 degrees, the motor shaft rotates. Even if you fix the end of the bellows-shaped elastic body that comes into contact with the section, the elastic body is twisted and deformed to guarantee the sealing function, so a low tank drain valve with a completely waterproof function that can operate even in water Could be realized.

According to a fifth aspect of the present invention, the motor and the reduction gear of the rotary actuator have a waterproof structure, and this waterproof structure is provided on the fixed part on the motor body side and the outer peripheral part of the rotary part of the motor shaft. 3. The low tank drainage valve according to claim 2, wherein the ring-shaped elastic body is sealed by using the function of contracting the elastic body by being stretched over the fixed end and the rotating end in a stretched state. did.

In the present invention, in the waterproof structure, a ring-shaped elastic body is hung on the fixed portion on the motor body side and the outer peripheral portion of the rotating portion of the motor shaft while extending over the fixed end and the rotating end. The ring-shaped elastic body is hung on the motor body and the motor shaft by using the contracting function of the elastic body to ensure the sealing function, so that the assemblability is good and the water will not splash. We were able to realize a low tank drain valve that requires simple waterproofing of the atmosphere.

According to a sixth aspect of the present invention, a wire having a superelastic function is interposed between the rotary actuator and the auxiliary operation section. It was used as a low tank drain valve.

In the present invention, a wire having a high torque transmission property, that is, a so-called twisting direction, which is hard to be plastically deformed in the twisting direction and a high elasticity function, is used in the present invention, so that the wire can be used at a long distance. It is possible to dispose the auxiliary operation unit that can be operated reliably with high reliability at any position.

In the sixth aspect of the invention, the usability can be further improved by the following configuration. It is preferable to provide a motor with a reduction gear between the wire having the superelastic function and the auxiliary operation unit.
Accordingly, the auxiliary operation section can be operated with a small force to operate the operation section. In addition, since a small motor can be placed outside the wash water tank, the motor waterproof mechanism that was required when the motor was placed in the wash water tank was omitted, or a simple waterproof structure was used. Since it can be changed to, it is possible to realize a highly reliable and low cost low tank drain valve. Further, the operation section may be moved by manually operating the auxiliary operation section connected to the wire having the superelastic function mechanically, not electrically. For example, as the push-button type auxiliary operation unit, the push-button type auxiliary operation unit may be arranged at an arbitrary position so that the operation in the thrust direction can be converted into the operation in the rotation direction at the other end of the wire. Further, it may be a rotary lever type, that is, by providing a rotary lever type auxiliary operation section capable of transmitting a movement in a rotation direction to the other end of the wire, the rotary lever type operation section can be arranged at any place. it can. A foot-operated auxiliary operation unit may be used as the auxiliary operation unit. By providing a foot-operated auxiliary operation unit that can convert the thrust operation to the rotational operation at the other end of the wire, it can be placed anywhere on the floor, etc., so that the auxiliary operation unit placed on the low tank can be operated by hand. Even for infants who do not reach or elderly people who can not take an unreasonable posture,
The foot-operated auxiliary operation unit can be easily operated.

According to a seventh aspect of the present invention, a casing having an upper end provided with a cleaning operation portion and the lower end communicated with a drainage pipe,
An inner sleeve that includes a valve body that is seated on a valve seat provided in the drain pipe in the casing, and a float above the valve body, and that is vertically driven to realize a valve opening / closing operation. An auxiliary operating device for operating an operating portion of a low tank drainage valve provided, wherein the auxiliary operating device includes at least an actuator shaft, a rotary arm pivotally mounted on the actuator shaft, and the rotary arm being rotatable in forward and reverse directions. A low tank drain valve auxiliary characterized by comprising a rotary actuator arranged to transmit a driving force to the actuator shaft so as to operate the operation unit by moving the actuator, and an auxiliary operation unit for operating the rotary actuator. The operation device.

By operating the operating portion using the rotary arm in this way, the movable height of the rotary arm can be kept lower than the actuator shaft that rotates the rotary arm. The height of can be lowered. Therefore, this auxiliary operating device can be arranged in a narrow gap between the lid of the raw tank and the casing. In addition, this operation part may be operated by being pushed down or by being pulled up. Further, when attached to a dual flush valve type low tank drain valve as in the prior art (US Pat. No. 5,657,494), it is connected to a push button type auxiliary operation section arranged on the low tank. The auxiliary operating device can be arranged above the casing so as not to interfere with the rod that abuts on the operating portion. In other words, since it is the rotating arm that operates the operating unit, it is sufficient if this rotating arm is arranged above the operating unit, and the rotary actuator body that transmits the driving force by the actuator shaft is displaced from above the casing. Therefore, the rod and the rotating arm can be arranged above the operation portion without interfering with each other. Therefore, the rotary arm of the rotary actuator,
Alternatively, either the vertical drive of the rod extending from the push button auxiliary operation unit can be reliably transmitted to the operation unit. Therefore, it is possible to easily operate the operation unit with a small force for infants and elderly people who can not take an unreasonable posture, and even when the motor cannot be driven due to power failure or failure, the push button auxiliary operation unit can also be used. A drainage operation can be realized, and a stable drainage operation can be realized.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. The low tank drainage valve of the present invention is provided with an operating portion for cleaning at the upper end and a casing in which the lower end is in communication with a drainage pipe, and a valve element seated in a valve seat provided in the drainage pipe in the casing, A float is provided above the valve body, and an inner sleeve that is driven in the vertical direction to realize a valve opening / closing operation is provided. Further, above the casing, an auxiliary operation including at least an actuator shaft, a rotary arm axially attached to the actuator shaft, and a rotary actuator arranged so that the rotary arm can rotate forward and backward freely. It is equipped with a device. Further, an auxiliary operating portion for operating the rotary actuator is provided, and when the auxiliary operating portion is operated to drive the rotary actuator of the auxiliary operating device and the driving force is transmitted to rotate the rotary arm, The operation part is operated by the rotating rotary arm, and the inner sleeve connected to the operation part is driven upward, so that the valve opening operation is realized.

The rotary actuator preferably includes a motor and a reduction gear that reduces the rotation of the motor and transmits it to the actuator shaft. Further, it is preferable that the rotating arm has a V shape.

Further, without providing a motor integrally with the rotary actuator, a wire having a superelastic function is interposed between the rotary actuator and the auxiliary operation portion, and the driving force is transmitted through this wire. You may.

Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings. According to the present invention, when the auxiliary operation unit is operated to drive the rotary actuator arranged at the upper part of the casing body and the driving force is transmitted to rotate the rotary arm, the tip of the rotary arm causes the operation unit to move. Push down.

Then, the drive link connected to the operating portion is rotated, and when the valve sleeve is opened apart from the valve seat by raising the inner sleeve in the low tank drain valve, drainage is started into the toilet bowl. At the same time, the water level in the tank drops, and water supply to the tank starts from the ball tap.

When the water level drops below the tank and drainage into the toilet is completed, the inner sleeve floating due to the float buoyancy moves down and sits on the valve seat.
When the tank begins to be filled with water again and the water level further approaches the full water position, the valve in the ball tap closes and water supply stops.

As described above, even in the conventional low tank drain valve, the rotary actuator of the present invention can be retrofitted so that remote operation can be easily performed and the operation portion can be arranged at an arbitrary position. Therefore, with the advent of an aging society in the future, it is possible to realize barrier-free operation of the low tank drain valve. In addition, the actuator can be easily installed so that it does not interfere with the rod extending from the conventional push button auxiliary operation part, and it fits compactly in the wash water tank. It is possible to improve the assembling work efficiency as compared with the assembling work.

FIG. 1 is a view showing an example in which a low flush drain valve 1 of the dual flush valve type of the present invention and a ball tap 20 are provided in a wash water tank 30.

As shown in FIG. 1, the low tank drain valve 1 is incorporated between the tank lid 101 and the tank bottom 102 of the wash water tank 30. The low tank drainage valve 1 includes an auxiliary operation unit 2 and a casing 3 which are incorporated in a tank lid 101.
And rotary actuator 2 mounted on the top of the casing
It is composed of 00.

The auxiliary operating section 2 is a push button housing 2a.
Large cleaning button 2c with partition wall 2b sandwiched inside
And a small cleaning button 2d, and the rod 2 is attached to each of the large cleaning button 2c and the small cleaning button 2d.
e and 2f are connected. A partition wall 2b is located between the large cleaning button 2c and the small cleaning button 2d, and the partition wall 2b blocks the buttons 2c and 2d from each other.

The casing 3 has a partition wall 3a at its lower end and a drainage pipe 4 at its lower end, and the drainage pipe 4 is inserted into a tank bottom opening 102a formed in the tank bottom 102 of the wash water tank. . The wash water from the drain 4 is supplied to the toilet body (not shown). As shown in the front view of FIG. 2, an opening 3b communicating with the inside of the wash water tank 30 is opened in the peripheral wall of the casing 3 so that water flows into the casing 3 through the opening 3b. At the upper end of the casing 3, operating portions 5a and 5b are provided at positions facing the rods 2e and 2f. These operation parts 5a, 5
b is a rod 2e by the compression springs 5c and 5d,
It is urged to the 2f side.

The rotary actuator 200 is arranged on the upper part of the casing 3, and the rotary actuator shaft 2
The rotating arm 200b is arranged and fastened to 00a so as not to interfere with the rods 2e and 2f. When the rotating arm shaft is rotated left (counterclockwise) or rightward (clockwise), the tip of the rotating arm is rotated. 200c,
200d will push down the operation parts 5a and 5b, respectively.

FIG. 2 shows the low tank drain valve 1 shown in FIG.
It is the figure which looked at from the front.

FIG. 3 shows the low tank drain valve 1 shown in FIG.
FIG. 7 is a mechanical view of the inside as seen from the front with the upper part of the casing 3 removed. As shown in FIG. 3, a support shaft 6 is fixed inside the casing 3, and a pair of drive links 7 and 8 are rotatably held around the support shaft 6. The operation arms 9 and 10 are connected to the drive links 7 and 8, respectively. The inner sleeve 1 is attached to the lower end of the operation arm 9.
1, the outer sleeve 12 is connected to the lower end of the operation arm 10. The inner sleeve 11 has a packing 11c as a valve body at the lower end, and a float 11d is formed above the packing 11c. The outer sleeve 12 is provided with a trough-shaped waiter 12a capable of storing water so that the height position thereof can be adjusted, and a cam 13 is provided on an upper end side thereof so as to be vertically rotatable. The cam 13 has a link rod 13a on its upper end side.
Is integrally formed and is connected to the outer sleeve 12 by a pivot 13b provided at the base end of the link rod 13a. The tip end portion of the link rod 13a is in contact with the operation arm 9 via the pin 13c. Then, when the operation arm 13 rises, the pin 1
When 3c abuts and moves along the operation arm 9, the cam 13 is rotatable in the clockwise direction around the pivot 13b. Then, when in the stationary position, the lower sleeve of the outer sleeve 12 is in a positional relationship with the member sitting on the partition wall 3a.

FIG. 4 is an isometric view of the low tank drain valve 1.

FIG. 5 shows the low tank drain valve 1 shown in FIG.
It is the figure which looked at the right side facing the front. From the figure, the rotary arm 200b of the rotary actuator is
You can see that it is arranged so as not to interfere with.

FIG. 6 shows the low tank drain valve 1 shown in FIG.
The rotary actuator 200 is arranged on the casing lid 3c. From FIG. 6, the rotary actuator 200
Is a rotary actuator pedestal 200e having a through hole for fixing the rotary actuator shaft 200a to the casing lid 3b, and a rotary actuator pedestal 200e that is axially attached to one end of the motor. Or wire splices, and the other side has rotating arm 200
a rotary actuator shaft 200a to which b is attached and fixed;
A rotary actuator tip 200c for pushing down the operation portions 5a and 5b at both ends in an arcuate shape,
It is composed of a rotary arm 200b having 200d.

FIG. 7 shows the rotary actuator 20 of FIG.
At 0, the rotation arm 200b is turned upside down and attached to the shaft, and the valve opening operation can be performed by pushing up the operation portions 5a and 5b. From the figure, the rods 2e, 2
f is connected to or integrated with the operation units 5a and 5b, respectively. Further, since the drive link (not shown) is removed and the operating portion and the inner sleeve are directly connected (not shown), the valve can be opened by pushing up the rod from the auxiliary operating portion. In this structure, since the drive link that converts the pushing-down operation of the operating portion into the pushing-up operation of the inner sleeve can be omitted, the height of the low tank drain valve can be further reduced.

FIG. 8 is a diagram in which the motor 40 is directly attached to the rotary actuator 200 shown in FIG. Further, this is the position of the origin of the motor 40 and the operation portions 5a and 5b. It can be seen that the motor is compactly assembled.

FIG. 9 shows the operation of the rotary actuator during large cleaning. The motor rotates clockwise (clockwise) toward the front view, and the rotary arm tip 200c of the rotary arm 200b moves the operating portion 5a. It is the figure pushing in. In the case of large cleaning, when a command to execute large cleaning is given from the motor drive controller 51 to the motor 40, the motor starts rotating to the right (clockwise) toward the front as shown in FIG. Fastened rotary actuator shaft 2
00a also rotates right (clockwise) at the same time. Then, the rotary arm 200b inserted and fitted to the rotary actuator shaft 200a similarly rotates clockwise (clockwise), and pushes the rotary actuator tip 200c until the operating portion 5a abuts the casing button lid 3c. Operation part 5a
The operating portion 5a is held at the lowest point pushing position for 0.5 to 1 second, and is rotated in the opposite direction (counterclockwise) again to return to the origin position of FIG. The operating portion 5a is the spring 5
Since it is urged by c, the rotary actuator tip 20
Return to the original position while contacting 0c.

FIG. 10 shows a rotary actuator for small cleaning, in which the motor rotates counterclockwise toward the front view.
Then, the rotation arm tip 200d is pushing in the operation portion 5b. Similarly, in the case of small cleaning, the motor drive controller 51 issues a command to execute small cleaning to the motor 4
When it is given to 0, as shown in FIG. 9, the motor starts left rotation (counterclockwise) toward the front, and the rotary actuator shaft 200a fastened to the motor shaft also rotates left (counterclockwise) at the same time. Then the rotary actuator shaft 200
Similarly, the rotary arm 200b inserted and fitted in a rotates left (counterclockwise), and the rotary actuator tip 2
00d pushes the operating portion 5b until it abuts on the casing lid 3c, and the operating portion 5 is moved to the lowest point pushing position of the operating portion 5b.
Hold b for 0.5 to 1 second, rotate again in the opposite direction (clockwise), return to the origin position in FIG. 7, and stand still. Since the operating portion 5b is biased by the spring 5d, the operating portion 5b returns to the original position while contacting the tip 200d of the rotary actuator.

FIG. 11 is a view in which a waterproof case lid 74 is attached to a waterproof case 73 in which a motor having a reduction gear is mounted, a rotary arm 200b is pivotally attached, and a rotary arm 200b is fixed by a pull-out prevention pin 75. Is. Waterproof case 7
3 and the waterproof case lid 74 are waterproofed with a sealant, and the motor shaft and the waterproof case are sealed with an O-ring.

In FIG. 12, a bellows-shaped elastic body 77 is stretched around the outer circumference of the waterproof case 73, which is the fixed portion, and the rotary arm 200b, which is the rotary portion, and both ends of the elastic ends are fixed to the respective portions. By doing so, the rotary contact portion 79 is completely waterproofed. In addition, even if the bellows-shaped elastic body is damaged to cause water intrusion, the motor shaft 72 and the waterproof case 7
Since the O-ring 76 is mounted between the two parts to form a double waterproof seal structure, it is possible to completely prevent water from entering the motor.

In FIG. 13, a ring-shaped elastic body 78 is stretched over the outer periphery of the waterproof case 73 which is the fixed part and the rotary arm 200b which is the rotary part of FIG. 11 while extending across the fixed end and the rotary end. The ring-shaped elastic body is pressed against the outer peripheral portion by utilizing the contracting function of the elastic body. Since the rotating arm 200b rotates forward and backward in the range of at least 90 degrees, the contact portion between the rotating arm 200b and the elastic body slides, and therefore some water intrusion occurs, but the motor shaft 72 and O between the waterproof cases 73
Since the ring 76 is loaded to form a double waterproof seal structure, water can be prevented from entering the motor, though it is simple.

FIG. 14 is a sectional view of the low tank drain valve. FIG. 15 shows that when the motor receives the “large cleaning” drive command,
FIG. 7 is a cross-sectional view of a case in which the rotational drive in the clockwise direction (clockwise) is started. When the operating portion 5a is pushed down via the rotary actuator tip 200c as shown in FIG. 9, the drive link 7 is rotated in the clockwise direction around the support shaft 6 as shown in FIG. By this rotation of the drive link 7, the operation arm 9 is lifted up, and the operation arm 9 moves so that the upper end of the inner sleeve upper ring 11e is the inner sleeve 11.
The inner sleeve 11 is pulled up by coming into contact with the protrusion 11a. Then, as the inner sleeve 11 rises, the packing 11c separates from the valve seat 4a at the upper end of the drain tube 4 to open the valve. (See FIGS. 15, 16 and 17) At this time, the cleaning water stored in the cleaning tank 30 flows out through the drain 4 to the toilet body (not shown) to wash away the dirt in the toilet.

On the other hand, when the water level in the cleaning tank 30 begins to drop, the ball tap float (not shown) of the ball tap 20 begins to descend along the water surface, so that the water stop valve (not shown) of the ball tap 20 opens. Water supply to the cleaning tank 30 from the ball tap spout 20c.

When the drainage for the large flush of the toilet approaches the completion, the water level in the flush tank approaches the float 11d of the low tank drain valve. At that time, the weight of the inner sleeve 11 becomes larger than the buoyancy of the float 11d,
The inner sleeve 11 descends, the packing 11c is seated on the valve seat 4a, and the drainage is stopped. (See Figure 14) At this time
The water surface in the cleaning tank 30 starts to rise. When the water level in the cleaning tank 30 continues to rise and approaches the position of WL (water line) when full, the ball tap float (not shown) of the ball tap 20 also rises along the water level, and the ball tap joined to the ball tap float. Two
0 The water shutoff valve (not shown) inside is closed to stop the water supply, and the large cleaning cycle is completed.

Next, in the case of a small cleaning, the rotary actuator 200 rotates left (counterclockwise) toward the front as shown in FIG. 10, and the rotary arm tip 200d pushes the operating portion 5b. Operation explanation is omitted) Packing 1
The valve 1c separates from the valve seat 4a at the upper end of the drain tube 4 and then opens. (See FIGS. 19 and 20) At this time, the cleaning tank 30
Similarly, the water stored in the water flows through the drain tube 4 into the toilet body (not shown) to wash away the dirt in the toilet bowl.

On the other hand, when the water level in the cleaning tank 30 begins to drop, the ball tap float (not shown) of the ball tap 20 begins to descend along the water surface, so that the water stop valve (not shown) of the ball tap 20 opens. Then, water supply to the cleaning tank 30 is started from the ball tap spout 20c. (See Figure 21)

When the drainage for the small flush of the toilet approaches the completion, the water surface in the washing tank 30 approaches the vicinity of the waiter 12a of the low tank drainage valve 1. At that time, the own weight of the inner sleeve 11, the outer sleeve 12, and the weight of the water accumulated in the waiter 12a becomes larger than the buoyancy of the float 11d.
Is lowered and the packing 11c is seated on the valve seat 4a and the drainage is stopped, so that the water surface in the cleaning tank 30 starts to rise. (See FIGS. 22 and 23) When the water level in the cleaning tank 30 continues to rise and approaches WL (water line) when full, the ball tap float (not shown) of the ball tap 20 also rises along the water level, and the ball tap float. The water shutoff valve (not shown) inside the ball tap 20 joined to (not shown) is closed to stop the water supply, and the small washing cycle is completed. (See Figure 14)

The inner sleeve 11 described above is
It has a tubular shape with open upper and lower ends, and when the water level of the stored water in the tank becomes higher than this inner sleeve 11, a structure is provided with an overflow mechanism for draining it into the toilet via this inner sleeve 11. Has become.

In FIG. 24, the wire 60 is joined to the rotary actuator 200, and the motor 40 is joined to the end portion of the other wire. In this case, a super elastic functional material is used for the wire 60. Therefore, even if the wire 60 is largely bent, the torque transmissibility is excellent, so that the motor 40
Can be arranged freely. By arranging the motor 40 outside the cleaning tank 30, the motor 40 is hardly affected by water, so that the motor waterproof function can be omitted or simplified.

FIG. 25 is a view in which a rotary operation lever 41 is joined to the end portion of the other wire 60 in place of the motor 40 of FIG. Since the wires 60 are joined together, the rotary operation lever 41 can be arranged at any position.

FIG. 26 is a view in which a push button type operation switch 42 is connected to the end portion of the other wire 60 instead of the motor 40 of FIG. Since the wires 60 are connected to each other, the push button type operation switch 42 can be arranged at any position.

FIG. 27 shows a push button type operation switch 42.
In the exploded view, a push button case 42a, a rotary disk 42b, and push button switches 42c and 42d for large and small washing are respectively configured.

In FIG. 28, the push button case 42a of the push button type operation switch 42 shown in FIG. 27 is removed,
It is an internal mechanism figure seen from diagonally. As shown in the figure, the rotating disc 42b has a rotating disc foot 42g and a rotating disc arm 42e for joining wires,
42f is projected, and the rotary disk arm 42e,
42f are push button switches 42c, 42, respectively.
It is in contact with the diagonally cut bottom surface of d.

In FIG. 29, when the push button switch 42d is pushed, the rotary disc arm 42f is in contact with the bottom surface of the push button switch 42d.
b rotates in the direction of the arrow in FIG. This rotating motion is transmitted to the rotary actuator 200 joined to the end of the other wire through the wire 60 joined to the rotating disc foot 42g, and the drain cycle of the low tank drain valve is started. .

FIG. 30 is an overall view of the foot-operated operation unit 43. As shown in the figure, the foot-operated operation unit 43 has a flat bottom portion that comes into contact with the floor, and has a pedestal binge attachment portion 43m for hingedly attaching the left and right foot pedal pedals 43b and 43c to one end and the other end. Has a rotary disk holding pedestal 43n with a through hole for pivotally mounting the rotary disk 43h, and a foot-operated operation unit pedestal 43a having a spring fixing projection 43s for fitting a spring on the upper surface. And, one end has a foot-operated operation unit pedestal 43a and a pedal hinge mounting portion 43p for hinged attachment, and the other end has a protruding portion 43q with a rounded tip on the entire lower side. The right foot pedals 43b and 43c, the rotary disc foot 43g and the rotary disc arms 43e and 43 for joining the wires.
The rotating disk 43h having the protruding f and the rotating disk 4
It is composed of a coupling ring 43k for axially coupling 3h to the foot-operated operation unit pedestal 43a and a coupling, and a compression spring 43d for urging the left and right foot pedals so that they are flipped up and held.

FIG. 31 shows the foot pedal 4 shown in FIG.
When 3b is pushed, the rotary disc arm 43e is brought into contact with the projecting portion 43q of the foot pedal 43b and rotates in the direction of the arrow in FIG. This rotational movement is performed by the rotary actuator 200 that is joined to the end of the other wire through the wire 60 that is joined to the rotating disc foot 43g.
Then, the drain cycle of the low tank drain valve is started.

FIG. 32 is an isometric view showing the whole structure in which the low tank drain valve is assembled to the cleaning tank, the front side of the cleaning tank is cut, and the operation operating section 50 and the motor drive controller 51 are mounted. The low tank drain valve described above is provided with an operating section for large cleaning and small cleaning, but it may be provided with only an operating section for large cleaning.

[Brief description of drawings]

FIG. 1 is a plan view of essential parts showing an example in which a low flush water drain valve of a dual flush valve type of the present invention and a ball tap are provided in a wash water tank.

FIG. 2 is a front view of the low tank drain valve as viewed from the front.

FIG. 3 is an internal mechanical view of the low tank drain valve with the upper part of the casing removed, as viewed from the front.

FIG. 4 is an isometric view of a low tank drain valve.

FIG. 5 is a right side view of the low tank drain valve.

FIG. 6 is an isometric view of a rotary actuator mounted on a casing lid.

FIG. 7 is an isometric view in which a motor is directly attached to a rotary actuator.

FIG. 8 is a diagram in which a rotating arm is turned upside down and is axially attached to a rotary actuator, and shows that a valve opening operation can be performed by pushing up an operation unit.

FIG. 9: When the rotary actuator receives a large cleaning command,
It is the figure which rotated right (clockwise) and stopped at the maximum right rotation angle.

FIG. 10 is a diagram in which the rotary actuator rotates left (counterclockwise) in response to a small washing command and stands still at the maximum left rotation angle.

FIG. 11 is a diagram in which a motor with a reduction gear is mounted in a waterproof case and a rotary arm 200b is axially mounted.

12 is a cross-sectional view in which a bellows-shaped elastic body is attached to FIG.

13 is a cross-sectional view in which the ring-shaped elastic body is attached to FIG.

FIG. 14 is a view showing a stationary state of the low tank drain valve.

FIG. 15 is a diagram showing an operating state of the low tank drain valve at the time of large cleaning.

FIG. 16 is a diagram showing an operating state of the low tank drain valve at the time of large cleaning.

FIG. 17 is a diagram showing an operating state of the low tank drain valve at the time of large cleaning.

FIG. 18 is a diagram showing an operating state of the low tank drain valve at the time of large cleaning.

FIG. 19 is a diagram showing an operating state of the low tank drain valve at the time of small cleaning.

FIG. 20 is a diagram showing an operating state of the low tank drain valve at the time of small cleaning.

FIG. 21 is a diagram showing an operating state of the low tank drain valve at the time of small cleaning.

FIG. 22 is a diagram showing an operating state of the low tank drain valve at the time of small cleaning.

FIG. 23 is a diagram showing an operating state of the low tank drain valve at the time of small cleaning.

FIG. 24 is a view in which a motor is joined to the other end of the wire joined to the rotary actuator.

FIG. 25 is a view in which a rotary operation lever is joined to the other end of the wire joined to the rotary actuator.

FIG. 26 is a view in which a push button type operation switch is joined to the other end of the wire joined to the rotary actuator.

FIG. 27 is a view in which a push button type operation switch is joined to the other end of the wire joined to the rotary actuator.

FIG. 28 is an exploded view of a push button type operation switch.

FIG. 29 is an internal structure diagram of the push-button operation switch with the case body removed.

FIG. 30 is a diagram showing an operating state of a push button type operation switch.

FIG. 31 is a diagram showing an entire foot-operated operation unit.

FIG. 32 is a diagram showing an operating state of a foot-operated operation unit.

[Explanation of symbols]

1 Low tank drain valve 2 Auxiliary operation section 2a push button housing 2b partition 2c Large cleaning button 2d Small cleaning button 2e, 2f rod 3 casing 3a partition 3b opening 3c casing lid 4 drain 4a valve seat 5a, 5b operation unit 5c, 5d spring 6 spindles 7, 8 drive link 9,10 Operation arm 11 Inner sleeve 11a protrusion 11b Engagement protrusion 11c packing 11d float 11e Inner sleeve upper ring 12 Outer sleeve 12a waiter 13 cams 13a Ring rod 13b Axis 13c pin 20 ball tap 20a ball tap spout 30 wash water tank 40 motor 41 Rotary operation lever 42 Push-button operation switch 42a push button case 42b rotating disc 42c, 42d push button switch 42e, 42f rotating disk arm 42g rotating disc foot 43 Foot operated unit 43a Foot-operated operation unit base 43b, 43c foot pedal 43d spring 43e, 43f rotating disk arm 43g rotating disc foot 43h rotating disc 43k coupling ring 43m pedestal hinge mounting part 43n rotating disk holding base 43p Pedal hinge mounting part 43q protruding part 43s Spring fixing protrusion 50 Remote control unit 51 Motor drive controller 60 wires 70 motor 71 Reduction gear unit 72 Motor shaft 73 waterproof case 74 waterproof case lid 75 Removal prevention pin 76 O-ring 77 Bellows-shaped elastic body 78 Ring-shaped elastic body 79 Rotating contact part 101 tank lid 102 tank bottom 102a Tank bottom opening 200 rotary actuator 200a rotary actuator shaft 200b rotating arm 200c, 200d Rotating arm tip 200e Rotary actuator base

Claims (7)

[Claims] 1. A casing having an operating portion for cleaning at an upper end and a lower end communicating with a drain, a valve body seated in a valve seat provided in the drain in the casing, and the valve body. In the low tank drainage valve having a float above and an inner sleeve that is driven in the vertical direction to realize a valve opening / closing operation, at least an actuator shaft and a shaft on the actuator shaft are provided above the casing. And a rotary actuator arranged so as to transmit a driving force to an actuator shaft so that the rotary arm can move forward and backward freely. An auxiliary operation unit for operating the actuator is provided, and the auxiliary operation unit is operated to drive the rotary actuator to transmit its driving force to rotate the rotary arm. A low tank drainage valve, characterized in that, when moved, the operating portion is operated by the rotated rotating arm, and an inner sleeve connected to the operating portion is driven upward to realize a valve opening operation. 2. The low tank drainage valve according to claim 1, wherein the rotary actuator includes a motor and a reduction gear that reduces the rotation of the motor and transmits the rotation to the actuator shaft. 3. The low tank drain valve according to claim 1, wherein the rotary arm has a V shape. 4. The motor and the reduction gear of the rotary actuator have a waterproof structure, and in this waterproof structure, a bellows-shaped elastic body is hung on the outer peripheral portion of the fixed portion of the motor body and the rotating portion of the motor shaft. The low tank drainage valve according to claim 2, wherein the elastic body is sealed by fixing both ends of the elastic body to the respective portions. 5. The motor and the reduction gear of the rotary actuator have a waterproof structure, and in this waterproof structure, a ring-shaped elastic body is provided on the fixed part on the motor body side and the outer peripheral part of the rotating part of the motor shaft. 3. The low tank drain valve according to claim 2, wherein the low tank drain valve is sealed by utilizing the function of contracting the elastic body by extending over the fixed end and the rotating end in a stretched state. 6. The low tank drainage valve according to claim 1 or 3, wherein a wire having a superelastic function is interposed between the rotary actuator and the auxiliary operation portion. 7. A casing having an upper end provided with an operating portion for cleaning and a lower end communicating with a drain, a valve body seated in a valve seat provided in the drain in the casing, and the valve body. Is an auxiliary operating device for operating an operating portion of a low tank drainage valve, which is equipped with a float above and is provided with an inner sleeve that is driven in a vertical direction to realize a valve opening / closing operation. At least an actuator shaft, and a rotating arm pivotally attached to the actuator shaft,
The rotary arm includes a rotary actuator arranged to transmit a driving force to an actuator shaft by operating the rotary arm so that the rotary arm can rotate forward and backward, and an auxiliary operation section for operating the rotary actuator. A special operation device for low tank drainage valves.