JPH094014A - Stool washing device - Google Patents

Abstract

PURPOSE: To make it possible to control a rotational angle of an output axis for opening and closing a drain valve by controlling only a power connection time to a motor with high degree of accuracy without using a rotational angle detector. CONSTITUTION: A signal line 53 connecting between a controller 51 and a motor 49 and a signal line connecting between the controller 51 and a motor 49 are separately provided respectively so that power connection control to the motor 49 and the power control to the solenoid 9 are separately executed. A synchronous motor or pulse motor, etc., capable of being continuously rotated at a certain speed without being influenced by variations in load are adopted, and the motor 49 is equipped with a spring mechanism 11 returning an output axis 1 in-situ through a clutch 7 when the magnetic of the solenoid 9 is erased and separating a decelerator 5 from the output axis 1. The controller 51 makes control turning the solenoid on after the motor is moved in a stationary state, or it makes control, etc., starting the motor 49 after the solenoid 49 is turned on to connect the decelerator 5 to the output axis 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a toilet bowl cleaning device for automatically cleaning a toilet bowl by electrically opening / closing a drain valve of the toilet bowl.

[0002]

2. Description of the Related Art A toilet flushing device of this type is used for cleaning a flush toilet by remote control in place of a human hand, and a drain valve (not shown) of the flush toilet as shown in FIG. ) Is opened and closed, a motor 3 for driving the output shaft 1, and a speed reducer 5 for reducing a rotation speed from the motor 3 to obtain a predetermined rotation torque and a predetermined rotation speed. In addition to the above configuration, the above-described device connects the speed reducer 5 and the output shaft 1 when the motor 3 is driven, and separates the clutch 7 when the motor 3 is stopped, and the output shaft 1 via the clutch 7 by excitation. A solenoid 9 for connecting the speed reducer 5 and the output shaft 1 is also provided. The device further returns the output shaft 1 to the original position via the clutch 7 when the solenoid 9 is demagnetized, and connects the spring mechanism 11, the motor 3 and the solenoid 9 for separating the reduction gear 5 and the output shaft 1 from each other. A controller 13 for controlling power supply is also provided.

[0003]

By the way, examples of the clutch 7 that can be adopted include those shown in FIGS.
The various electromagnetic meshing clutches shown in FIG. 5 and the electromagnetic friction clutch shown in FIG.

Of these, the electromagnetic meshing clutch 15 shown in FIG. 2 has a small number of teeth and large teeth 21 and 23 for high torque transmission, and FIG.
The electromagnetic meshing clutch 19 shown in (1) has a small number of teeth and small teeth 29, 31 and is for low torque transmission. In the electromagnetic meshing clutch 15, the slip between the teeth 21 and 23 greatly varies depending on the position at which the teeth 21 and 23 facing each other with a certain clearance start to mesh with each other. Further, also in the electromagnetic meshing clutch 15, the slip amount between the teeth 29, 31 largely varies depending on the position at the time when the teeth 29, 31 facing each other with a constant clearance start to mesh with each other. Therefore, when any one of the above is adopted as the clutch 7, the time required from when the solenoid 9 is turned on until the speed reducer 5 and the output shaft 1 are connected, that is, the tooth (21,
23) The added value of the clearance movement time for bringing one of the teeth closer to the other tooth (29, 31) and the meshing delay time due to the above-mentioned slip will greatly vary due to a large fluctuation of the meshing delay time. Therefore, the motor 3
It is difficult to control the rotation angle of the output shaft 1 according to the rotation angle of the motor 3 only by controlling the energization time to the constant.

On the other hand, the electromagnetic meshing clutch 17 shown in FIG. 3 is for high torque transmission and has a small number of teeth 25 and 27 and a large number of teeth. Teeth 2 more than dog clutches 15 and 19
Since it is possible to reduce the fluctuation of the slippage between Nos. 5 and 27, when this is adopted as the clutch 7, it is possible to reduce the fluctuation of the meshing delay time due to the slippage that is added to the clearance movement time. There are advantages. On the other hand, not only high machining accuracy is required to prevent the teeth 25 and 27 from being unbalanced, but also when the rotation of the motor 3 is in a transient state, the variation in the meshing delay time due to slippage may increase. There was also.

Further, in the electromagnetic friction clutch 33 shown in FIG. 5, since the friction plates 35 and 37 facing each other are strongly contacted by the electromagnetic force of the solenoid 9, power is transmitted, so that the above-mentioned slippage occurs. Because it does not occur at all,
Although there is no time delay due to slip added to the clearance movement time, it is mainly used in a device that frequently engages / disengages the clutch while rotating the motor in a high speed region. It is not used in the clutch 7 of.

As described above, whichever clutch is used, there is a time delay between the time when the solenoid 9 is turned on and the time when the clutch 7 is engaged. Therefore, in the case of the circuit configuration in which the motor 3 and the solenoid 9 are connected in parallel to the controller 13 as in the above device, the motor 3 and the solenoid 9 are simultaneously driven when the controller 13 turns on the power (see FIG. 8). At time t1), the clutch 7 is connected during the transition from the start of the motor 3 to the steady rotation. Therefore, it is difficult to accurately control the rotation angle of the output shaft 1 only by controlling the energization time to the motor 3 to be constant.

Therefore, when the Hall IC (rotation sensor) 43 detects the magnet 39 by the rotation of the disk 41 with the magnet 39 attached to the output shaft 1 as shown in FIG. 6, the output shaft 1 rotates by a predetermined angle. As a motor 3
Device for stopping driving, and output shaft 1 as shown in FIG.
When the normally open contact 47 near the output shaft 1 is opened due to the separation of the cam 45 due to the rotation of the cam 45 attached to the motor 3, it is proposed that the output shaft 1 is rotated by a predetermined angle and the motor 3 is stopped. It was In the case of the device of FIG. 6, when the rotation sensor 43 outputs a signal indicating that the rotation has been performed by a predetermined angle, the controller 13 simultaneously stops the power supply to the motor 3 and the solenoid 9 (see time t3 in FIG. 8).
On the other hand, in the case of the device of FIG. 7, when the cam 45 separates from the normally open contact due to the rotation of the output shaft 1, the power supply to the motor 3 side is cut off regardless of the controller 13.
The power supply to the solenoid 9 is stopped after the power supply to the motor 3 is cut off (see time t2 and time t3 in FIG. 9).

However, in any of the above-mentioned devices, since a sensor for detecting the rotation angle of the output shaft 1 is required, the structure of the device is complicated and the number of parts is large, resulting in high cost. There was a point.

Therefore, it is an object of the present invention to control the rotation angle of the output shaft for opening and closing the drain valve with high accuracy by simply controlling the energization time to the motor without using the rotation detecting means. Accordingly, it is an object of the present invention to provide a toilet bowl cleaning device capable of simplifying the device configuration and reducing the cost by reducing the number of parts.

[0011]

SUMMARY OF THE INVENTION The present invention is a toilet bowl cleaning device for automatically opening a drain valve of a flush toilet to clean the toilet bowl, and a motor for opening / closing the drain valve and the motor. An electromagnetic clutch that transmits the driving force of the
It is characterized by comprising a controller for controlling the motor and the electromagnetic clutch, and independent signal lines for individually transmitting a control signal from the controller to the motor and the electromagnetic clutch.

In a preferred embodiment, the motor is
The motor is characterized in that the rotation speed does not fluctuate due to load fluctuations.

Further, in a preferred embodiment, the controller controls the motor and the electromagnetic clutch so that the start timing or the drive stop timing of the motor deviates from the start timing or the drive stop timing of the electromagnetic clutch. It is characterized by controlling.

[0014]

According to the present invention, since independent signal lines for individually transmitting the control signal from the controller to the motor and the electromagnetic clutch are provided, it is possible to send the signal to the motor without using the rotation detecting means. The rotation angle of the output shaft for opening and closing the drain valve can be controlled with high accuracy simply by controlling the energization time.

Further, according to a preferred embodiment, by adopting a motor such as a synchronous motor or a pulse motor which is not affected by load fluctuations, the output shaft for opening / closing the drain valve of the flush toilet is adopted. On the other hand, more precise rotation angle control can be performed.

Further, according to the preferred embodiment, it is possible to control the motor and the electromagnetic clutch so that the start timing or the drive stop timing of the motor deviates from the start timing or the drive stop timing of the electromagnetic clutch. Therefore, the optimum control according to the application can be performed.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 10 is a block diagram showing a toilet bowl cleaning device according to an embodiment of the present invention.

The above-mentioned device is basically the same in construction as that of the conventional device shown in FIG. 1, and is provided with the magnet 39 shown in FIG. 6 as a means for detecting the rotation angle of the output shaft 1. Disc 41 and Hall IC (rotation sensor) 4
3 and the cam 45 and the normally open contact 47 shown in FIG. 7 are not provided.

That is, in the above device, the signal line 53 connecting the controller 51 and the motor 49, the controller 51 and the solenoid 9 are provided so that the energization control for the motor 49 and the energization control for the solenoid 9 can be performed independently. The main feature is that the signal line 55 for connecting with each other is independently provided (see also FIG. 11). In addition, the motor 49
In addition, it is also a feature of the above-described device that a motor, such as a synchronous motor or a pulse motor, that can continue rotation at a constant rotation speed without being affected by load fluctuations is adopted. The above device also includes a spring mechanism 11 for returning the output shaft 1 to the original position via the clutch 7 when the solenoid 9 is demagnetized, and for separating the speed reducer 5 from the output shaft 1.

In the above structure, for example, FIG. 2 or FIG.
When the electromagnetic meshing clutches 15 and 19 as shown in FIG.
12 starts the motor 49 at time T1 in FIG. 12 (or FIG. 13) and turns on the solenoid 9 at time T2 in FIG. 12 (or FIG. 13) when the rotation of the motor 49 shifts from the transient state to the steady state. Get excited. Then, at time T4 in FIG. 12 when the rotation angle of the motor 49 reaches a predetermined value, control for simultaneously stopping energization of the motor 49 and the solenoid 9 is executed, or
Alternatively, after stopping the energization of the motor 49 at the time T3 of FIG. 13, the control is executed to stop the energization of the solenoid 9 at the time T5 of FIG.

By carrying out such control, the teeth (21, 23 or 29, 31) facing each other are meshed with each other when the rotation speed of the motor 49 is within the stable rotation region. Therefore, the meshing will be performed more smoothly than before, and the teeth (2
1, 23 or 29, 31), the magnitudes of the slip amounts are averaged, so that the variation in the meshing delay time due to the slip added to the clearance movement time can be reduced.

Next, even when the electromagnetic meshing clutch 17 shown in FIG. 3 is adopted as the clutch 7, the clearance moving time is controlled by performing the control shown in FIGS. 12 and 13, respectively. It is possible to further reduce the variation in the meshing delay time due to the slippage between the teeth added to the.

Further, when an electromagnetic meshing clutch having a tooth size much smaller than that of the electromagnetic meshing clutch 17 as shown in FIG. 3 is adopted as the clutch 7, the controller 51 firstly executes the operation shown in FIG. (Fig. 15)
At time T'1, the solenoid 9 is excited and the solenoid 9 is excited. Next, the clutch 7 is used to reduce the speed reducer 5 and the output shaft 1.
The motor 49 is started at time T'2 in FIG. 14 (or FIG. 15) where is connected to and the motor 49 and the solenoid 9 are driven at time T'3 in FIG. 14 when the rotation angle of the motor 49 reaches a predetermined value.
Control for simultaneously stopping the power supply to the motor 49 or after stopping the power supply to the motor 49 at time T'4 in FIG.
At time T′5 in FIG. 15 after a predetermined time has elapsed, control for stopping energization of the solenoid 9 is executed.

By performing such control, the reduction gear 5 and the output shaft 1 are connected by the clutch 7 while the motor 49 is stopped. The impact at the time of engagement can be mitigated, and the teeth can be less likely to be damaged. Therefore, the above control is particularly effective when an electromagnetic meshing clutch that cannot increase the size of the teeth and does not have a high safety factor in terms of strength is adopted.

The above-described contents are only related to one embodiment of the present invention, and it goes without saying that the present invention is not limited to the above contents.

[0027]

As described above, according to the present invention, the rotation angle control of the output shaft for opening and closing the drain valve can be enhanced only by controlling the energization time to the motor without using the rotation angle detecting means. It is possible to provide a toilet bowl cleaning device that can be performed with high accuracy and that can simplify the device configuration and reduce the cost by reducing the number of parts.

[Brief description of drawings]

FIG. 1 is a block diagram of a conventional toilet bowl cleaning device.

FIG. 2 is an explanatory diagram of an electromagnetic meshing clutch.

FIG. 3 is an explanatory view of another electromagnetic meshing clutch.

FIG. 4 is an explanatory view of yet another electromagnetic meshing clutch.

FIG. 5 is an explanatory diagram of an electromagnetic friction clutch.

FIG. 6 is a block diagram of a conventional toilet bowl cleaning device including an electric rotation sensor.

FIG. 7 is a block diagram of a conventional toilet bowl cleaning device including a mechanically configured rotation sensor.

FIG. 8 is a timing chart showing a control operation of the controller of FIGS. 1 and 6.

9 is a timing chart showing a control operation of the controller of FIG.

FIG. 10 is a block diagram of a toilet bowl cleaning device according to an embodiment.

11 is a block diagram showing a simplified configuration of FIG.

12 is a timing chart showing a control operation of the controller of FIG.

13 is a timing chart showing a modification of the control operation shown in FIG.

14 is a timing chart showing another control operation of the controller of FIG.

15 is a timing chart showing a modification of another control operation shown in FIG.

[Explanation of symbols]

 1 Output Shaft 5 Reducer 7 Clutch 9 Solenoid 11 Spring Mechanism 49 Motor 51 Controller 53 55 Signal Line

Claims (3)

[Claims] 1. A toilet bowl cleaning device for automatically opening a drain valve of a flush toilet to clean the toilet bowl, comprising: a motor for opening / closing the drain valve; and a driving force of the motor transmitted to the drain valve. And a controller for controlling the motor and the clutch, and signal lines independent of each other for individually transmitting a control signal from the controller to the motor and the clutch, respectively. apparatus. 2. The toilet bowl cleaning device according to claim 1, wherein the motor is a motor whose rotation speed does not fluctuate due to load fluctuations. 3. The toilet bowl cleaning device according to claim 1 or 2, wherein the controller shifts a start timing or a drive stop timing of the motor from a start timing or a drive stop timing of the clutch, A toilet bowl cleaning device characterized by controlling the motor and the clutch.