JPH0921153A - Draining device for tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize an ultrasonic motor for a device, draining washing water stored in a low tank mounted on a closet, as a drive source. SOLUTION: A rotary type ultrasonic motor 2 is arranged in a tank 1, and a rotary shaft 2a thereof and a float valve 5 are connected together through a chain 4. Through operation of a switch by a user or detection of a human body by a sensor, the ultrasonic motor 2 is started to lift a float valve 5 through the chain 4, and washing water is discharged. Since the ultrasonic motor is small and has high torque, the motor is simply structured, and an incorporation space is also reduced. Since no electromagnetic induction noise is not generated, an adverse influence is not exercised on an electric part. Since an operation sound is low, quietness is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for draining cleaning water stored in a low tank or the like attached to a toilet bowl, and uses an ultrasonic motor as a drive source thereof.

[0002]

2. Description of the Related Art Generally, as a means for draining cleaning water from a low tank installed in a toilet bowl, a float valve for opening and closing a drain port is arranged at the bottom of the tank, and the float valve and the side wall of the tank are connected to the float valve. The handle is attached so that it can rotate freely, and it is connected by a connecting tool such as a chain.By lifting the float valve by rotating the handle, the cleaning water stored in the tank is discharged. is there.

In view of the fact that the operation of the handle makes the user feel annoyed, in order to improve this, a rotary solenoid is installed in the tank, and a chain is connected to the tip of the operating rod connected to its rotary shaft. Therefore, a configuration in which the lifting of the float valve is electrically operated has been conventionally proposed.

[0004]

In the prior art for electrically controlling the lifting operation of the float valve, a rotary solenoid is used as a drive source, but the float receives a large water pressure from the stored cleaning water. High torque is required to lift the valve. Therefore, since a relatively large rotary solenoid is used, there is a problem that the inside of the low tank becomes small.

Further, when an electric device such as a hot water washing device is installed, electromagnetic induction noise generated from the rotary solenoid may adversely affect the surrounding electric device.

[0006]

DISCLOSURE OF THE INVENTION The gist of the present invention is to use an ultrasonic motor of a small size and a large torque as a drive source for a drainage device of a tank. The feature is that the drain valve provided at the bottom of the tank and the rotary shaft of the rotary ultrasonic motor are connected by a connecting tool such as a chain.

When the linear ultrasonic motor is used as a drive source, the linear drive shaft and the drain valve are connected by a connecting tool such as a chain.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An ultrasonic motor has the characteristics that it has good responsiveness, can be easily controlled delicately, and is small in size, yet can obtain high torque at low speed.
Therefore, when constructing a drainage device using a rotary ultrasonic motor, a simple configuration in which the rotating shaft of the motor and the drainage valve are connected by a connecting tool such as a chain enables delicate control, and the tank The space for assembling inside can be reduced.

On the other hand, even in the case of using the linear type ultrasonic motor, it is only necessary to interpose the rack-pinion structure between the connecting member connected to the drain valve and the linear drive shaft of the ultrasonic motor. After all, it can be done with a simple mechanism.

Since the ultrasonic motor does not generate a magnetic field, it does not cause a disturbance due to electromagnetic induction noise in surrounding electric parts, and has an advantage that it does not generate noise because the operation noise is very small.

[0011]

【Example】

[First Embodiment] First, a drainage device for a tank using a rotary ultrasonic motor will be described. FIG. 1 shows an embodiment in which a drainage device according to the present invention is incorporated in a low tank 1 installed in a toilet, in which an arm 3 is attached to a rotary shaft 2a of a rotary ultrasonic motor 2 arranged in the tank 1.
Is attached, and the tip of this arm 3 and a drain valve composed of a float valve 5 arranged at the bottom of the tank 1 are connected by a connecting tool such as a chain 4.

In the drainage device having such a structure, the ultrasonic motor 2 is activated to rotate the rotary shaft 2a by a predetermined angle, and the arm 3 interlocking with this is rotated by a required angle. Then, the float valve 5 is pulled up through the chain 4 (4a) connected to the tip of the arm 3, and the discharge of washing water is started.
When the float valve 5 rises to open the drain port, the power supply to the ultrasonic motor 2 is immediately stopped, and the rotary shaft 2a is allowed to freely rotate. The float valve 5 maintains its raised position by buoyancy while the water level in the tank 1 is sufficiently high, but it descends as the water level in the tank 1 decreases as the discharge of wash water progresses. Therefore, if the rotary shaft 2a of the motor 2 is allowed to freely rotate as described above, the descending float valve 5 pulls the arm 3 downward through the chain 4a, and eventually the arm 3 returns to its original position.

By attaching a weight (not shown) to the tip of the arm 3 or in the middle of the chain 4, or by disposing a spring (not shown) between the rotary shaft 2a and the arm 3, A configuration in which the arm 3 automatically returns to the original position prior to the descending of the float valve 5 while continuing to discharge the wash water when the power supply to the sonic motor 2 is stopped is also possible.

Further, after the float valve 5 is pulled up, instead of stopping the energization of the ultrasonic motor 2 and shifting the rotary shaft 2a to a state in which it can freely rotate, the rotary shaft 2a is reversely rotated and forced. Alternatively, the arm 3 may be returned to the original position.

The ultrasonic motor 2 is started up by arranging a human body detection sensor in addition to the switch operation by the user.
It can be set so as to be automatically executed according to the approaching / leaving of the user. Here, the human body detection sensor 3 is
The type of infrared sensor, pyroelectric sensor, ultrasonic sensor, etc. is not particularly limited.

Further, since the amount of flush water discharged from the tank 1 is made different between urine and stool, it has been conventionally practiced that the rotation amount of the rotary shaft 2a of the ultrasonic motor 2 is also changed in this embodiment. It is conceivable to control the power supply time to the ultrasonic motor 2 and increase / decrease the discharge amount of the cleaning water in addition to the control. That is, when maximizing the amount of flush water such as after stools, the ultrasonic motor 2 raises the float valve 5 to a height position where it does not sit until the drain of flush water in the tank 1 is finished, and then the energization is stopped. Good.

On the other hand, when it is desired to reduce the amount of washing water such as during urination, the ultrasonic motor 2 raises the float valve 5 so that the drain port is opened only while the pulling force acts on the float valve 5. , Set so that when the pulling force disappears, you will immediately sit down. That is, the ultrasonic motor 2 pulls up the float valve 5 to a predetermined height and holds this state for a required time, whereby a small amount of urine cleaning can be performed.
In the case of the present embodiment, the duration of a small amount of cleaning for urine may be determined by setting the operation duration of the ultrasonic motor 2 in advance, but it may also be configured to be determined by the operation time of the switch or the like. Good. Furthermore, when the operation duration of the ultrasonic motor 2 is set in advance, it may be possible to set the time length so that it can be selected from a plurality of types, long or short.

By the way, in the present embodiment, as shown in the figure, the middle of the chain 4 is bifurcated to provide side chains 4a and 4b, and the handle 6 is rotatably attached to the outer wall of the tank 1, and One side chain 4b of the chain 4 was connected to the bent tip of the spindle shaft 7. As a result, when the ultrasonic motor 2 cannot be driven due to a power failure or the like, the float valve 5 can be opened by the manual operation of the handle 6 to discharge the wash water.

[Second Embodiment] In the drainage device shown in FIG. 2, the pinion 10 is attached to the rotary shaft 2a of the ultrasonic motor 2,
A rack 11 that meshes with the rack 11 is arranged, and one end of a chain 4 connected to the float valve 5 is attached to the lower end of the rack 11. By driving the ultrasonic motor 2 and rotating the pinion 10 attached to the rotary shaft 2a a predetermined number of times, the rack 11 is raised in the linear direction by a predetermined distance, and the float valve 5 is pulled up via the chain 4 to perform drainage. Let

Also in this embodiment, the lift amount of the float valve 5 is controlled by the rotation amount of the rotary shaft 2a of the ultrasonic motor 2, and its setting including the change of the wash water amount is the same as that of the above embodiment. The same shall apply. Further, similarly to the means for returning the rack 11 to the original position after pulling up the float valve 5, the configuration described in the first embodiment can be applied.

[Third Embodiment] FIG. 3 shows an embodiment in which a linear ultrasonic motor 12 is used as a drive source for a drainage device. In this embodiment, the ultrasonic motor 12 is installed so that the linear drive shaft 13 moves in the vertical direction, and one end of the chain 4 connected to the float valve 5 is attached to the lower end of the linear drive shaft 13.

However, the chain 4 is not directly attached to the linear drive shaft 13, but a cushioning member such as a spring (not shown) is interposed between the two so that the chain 4 is entangled and an excessive force acts. It is also possible to prevent damage when doing.

Since the control mode of the linear type ultrasonic motor in this embodiment is similar to that of the above-mentioned embodiment,
The description here is omitted.

[Fourth Embodiment] In each of the embodiments illustrated in FIGS. 1 to 3, the chain 4 connected to the float valve 5 is bifurcated midway, and one side chain 4a is connected to the ultrasonic motor. Attach the other side chain 4b to the handle 6 for manual operation
Attached to. However, the bifurcated chain 4 has a problem that it is apt to cause an accident in which the chain 1 is entangled in the tank 1. Therefore, as shown in FIG. 4, the chain 4 is attached to one end of the rotary shaft 15 of the ultrasonic motor 14 via the arm 16 and the handle 6 is attached to the other end, and the rotary shaft 15 is manually operated by the handle 6 when not energized. It is possible to think of a configuration of rotating. According to such a configuration, the chain 4 connected to the float valve 5 may be one linear chain, so that the occurrence of entanglement is reduced.

In this embodiment, the internal tank 2 for storing the cleaning water, which accommodates the ball tap 21 together with the float valve 5,
0 is installed inside the tank 1, and the ultrasonic motor 14 is arranged in the gap between the internal tank 20 and the tank 1. This structure makes it difficult for the ultrasonic motor 14, which is an electric component, to come into contact with the cleaning water, and therefore has the advantage of preventing accidents and failures.

Further, when the tank 1 does not have the double structure as described above, the ultrasonic motor 14 is provided on the outer surface of the tank 1 and the motor 1 is provided outside the tank 1.
It is also conceivable that the handle 6 is attached to the rotary shaft 15 of No. 4 and the tip of the rotary shaft 15 inserted into the tank 1 is connected to the chain 4.

Other Embodiments The embodiments of the present invention can be applied in various ways other than those described above. For example,
Since the ultrasonic motor has a large torque, it is possible to directly connect the arm to the rotating shaft, but in some cases, the minimum necessary gear mechanism may be interposed. The gear ratio in this case is set to be optimum according to the motor torque and the like. In addition, the present invention does not prevent appropriate changes according to the embodiments.

[0028]

Since the tank drainage device according to the present invention uses the ultrasonic motor having a small size and a large torque as a drive source thereof, a wide installation space is not required and the assembly is easy.

Further, since the ultrasonic motor does not generate a magnetic field, there is no possibility of causing damage to surrounding electric equipment due to electromagnetic induction noise.

Further, since the operation noise of the ultrasonic motor is very low, there is an advantage that the drainage operation can be quiet.

[Brief description of drawings]

1 is a front sectional view showing a first embodiment of a drainage device for a tank according to the present invention.

FIG. 2 is a front sectional view showing a second embodiment of the drainage device for a tank according to the present invention.

FIG. 3 is a front sectional view showing a third embodiment of the tank drainage device according to the present invention.

FIG. 4 is a front sectional view showing a fourth embodiment of the tank drainage device according to the present invention.

[Explanation of symbols]

 1 Tank 2 Ultrasonic Motor (Rotating Type) 2a Rotating Shaft 3 Arm 4 Chain (Connector) 5 Float Valve (Drain Valve)

Claims (2)

[Claims] 1. A device for draining cleaning water by pulling up a drain valve provided at the bottom of a tank from a drain port, wherein the rotary shaft of a rotary ultrasonic motor and the drain valve are chains or the like. A drainage device for a tank, characterized in that it is connected by a connecting tool. 2. A device for draining cleaning water by pulling up a drain valve provided at the bottom of a tank from a drain port, wherein a linear drive shaft of a linear ultrasonic motor and the drain valve are chains. A drainage device for a tank, which is connected by a connecting tool such as.