JP3440204B2 - Drain valve opening and closing control device - Google Patents

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 drainage valve opening / closing control device for controlling opening / closing of a drainage valve of a washing machine or the like using a drainage valve opening / closing drive source such as a small motor.

[0002]

2. Description of the Related Art Conventionally, as a drainage valve opening / closing control device used in a washing machine or the like, a system in which a single control device controls the opening / closing control of the drainage valve and various operation controls of the washing machine has been widely adopted. For example, the drive of the washing motor (motor for driving the washing machine) during the washing operation and the opening / closing control of the drain valve for performing the subsequent drainage, and the drain valve is opened (drainage) at the time of dehydration. One control device performs control such as rotating the washing tub at high speed and closing the drain valve and stopping the washing motor when dehydration is completed. Note that the control device is configured so that, when the lid of the washing tub is opened at the time of dehydration, control such as sudden stop of the washing tub can be performed.

As such a drain valve opening / closing control device,
The device etc. which are disclosed by Japanese Utility Model Publication No. 1-121591 are known. In the case of a power failure during dehydration, this device needs to perform control so that the user can be surely returned to the initial position after the power failure is restored, in consideration of the safety of the user. Has become.

For this reason, some systems have adopted a system in which the drain valve opening / closing control and various other controls are performed separately (see Japanese Patent Laid-Open No. 6-79093). In the drainage valve opening / closing control device of such a system, control may be performed by considering only opening / closing of the drainage valve.

[0005]

The drain valve opening / closing control device which considers only the opening / closing of the drain valve has more control contents than the above-described method of collectively performing various controls of the washing machine. It is greatly simplified and its structure is also simplified. However, even with such a drainage valve opening / closing control device, the problem that the impact noise is large when the drainage valve is closed still remains.

Generally, in the conventional drain valve opening / closing control device of this type, a force for returning the drain valve to the fully closed state is always applied to the drain valve. When the drain valve is opened against the force that tries to return it to the closed state, and when the drain valve is moved from the fully open state to the fully closed state, the force that tries to return to the fully closed state described above causes a momentary closed state. It is normal to let The reason why the drain valve is forcedly and instantly closed is to ensure the closed state of the drain valve and prevent water leakage.

As described above, the conventional drainage valve opening / closing control device of this type has a problem that the impact noise is large when the drainage valve is changed from the open state to the closed state, and improvement thereof is desired. Further, the reliability of the opening / closing operation of the drainage valve, the further simplification of the mechanism, and the cost reduction are always required, and the development of a drainage valve opening / closing control device capable of coping therewith is desired.

Therefore, the present invention aims to improve the reliability of the opening / closing operation of the drainage valve and to further simplify the mechanism, to significantly improve the problem of impact noise in the closing operation of the drainage valve, and to reduce the cost. It is an object of the present invention to provide a drainage valve opening / closing control device that enables the above.

[0009]

In order to achieve the above object, the invention according to claim 1 uses a rotational force of a drain valve opening / closing drive source for a drain valve which receives a restoring force to a fully closed state. In a drain valve opening / closing control device for opening / closing, an output shaft to which the rotating force of a drain valve opening / closing drive source is transmitted, a rotating member that receives the rotating force of the output shaft , and a rotating member that receives the rotating force of the rotating member.
And perform a linear reciprocating motion to open and close the drain valve .
It has a valve opening / closing operation part having a lid, and a one-way clutch mechanism for transmitting the rotational force of the output shaft to the valve opening / closing operation part in a detachable manner, and the valve opening / closing operation part opens the drain valve.
At this time, the rotational force of the output shaft is transmitted by the one-way clutch mechanism , the rotating member rotates in one direction, and
The forward movement against the return force of the drain valve to the fully closed state
And, rotating member, performs an operation to fully open the drain valve at a position rotated by a predetermined angle, when fully closed the drain valve from that state, with the rotation of the output shaft, the rotating member drainage
When the valve restarts to rotate in the same direction as when the valve is opened and reaches a predetermined rotational position, the one-way clutch mechanism releases the rotational force from the output shaft and returns. The rod moves back by the force, and the rotating member moves the drain valve.
It is designed to rotate in the same direction as when the is opened .

According to a second aspect of the present invention, in the drain valve opening / closing control device according to the first aspect, the one-way clutch mechanism includes a coil spring interposed between the output shaft and the valve opening / closing operation portion. When the drain valve is opened by transmitting the rotational force of the output shaft to the valve opening / closing operation part by the frictional force generated by the elastic force acting in the radial direction of the When the return force to the fully closed state of the drain valve that works in the opposite direction is applied, the output shaft and the valve opening / closing operation unit are integrated due to the increase in frictional force due to the change in the diameter of the coil spring, and the output shaft When transmitting the rotational force in one direction to change the drain valve from the fully open state to the fully closed state, return to the fully closed state of the drain valve that operates in the same direction as the rotation direction of the output shaft with respect to the valve opening / closing operation part. When a force is applied, the front of the coil spring By reducing the frictional force by the reverse change to the change in diameter, thereby enabling sliding rotating the valve opening and closing unit with respect to the coil spring.

Further, the invention according to claim 3 is based on claim 2.
In the drain valve opening / closing control device described above, the valve opening / closing operation part is slid with respect to the rotation of the output shaft due to the return force to the fully closed state of the drain valve that operates in the same direction as the rotation direction of the output shaft with respect to the valve opening / closing operation part. When it is rotatable, it is rotated in a state where it receives a constant braking force due to a frictional force acting between the coil spring and the coil spring.

Further, the drain valve opening / closing control device according to claim 4 is a drain valve opening / closing control for opening / closing a drain valve which receives a restoring force to a fully closed state by utilizing the rotational force of a drain valve opening / closing drive source. In the device, the drain valve opening / closing operation is performed by rotating the output shaft to which the rotational force of the drain valve opening / closing drive source is transmitted and receiving the rotational force of the output shaft and outputting the rotational force as a linear reciprocating motion. And a valve opening / closing operation section having a cam section that rotates with the rotation of the output shaft, and a switch that is activated by the cam section of the valve opening / closing operation section to generate a timing signal during the rotation operation of the valve opening / closing operation section. , performs drive control of the drain valve opening and closing drive source, drain valve opening and closing to perform a drive stop control of the drain valve opening and closing drive source after a predetermined time upon receiving the timing signal from the switch as one of its drive control When the drain valve is opened, the valve opening / closing operation part has a control part, and when the drain valve is opened, the rotating force of the output shaft is transmitted to rotate in one direction, and the drain valve is fully opened at a position rotated by a predetermined angle. When the drain valve is fully closed from that state, the rotation is restarted with the rotation of the output shaft, and when the specified rotation position is reached, the transmission of the rotational force from the output shaft is released and the drainage is drained. The drainage valve opening / closing drive source control unit at least causes the drainage valve opening / closing operation unit to open the drainage valve fully open state by rotating the drainage valve to the fully closed state by the return force of the valve to the fully closed state. When receiving the timing signal from the switch, the drain valve opening / closing drive source is driven to stop the valve opening / closing operation part at a predetermined position after the drain valve is fully opened by using the timing signal. Stop control is performed and the drain valve is fully opened. When the state is,
The drainage valve opening / closing drive source is restarted to rotate the valve opening / closing operation part in the same direction as the above rotation direction, and drainage is performed so that the valve opening / closing operation part is stopped at a predetermined position after the drainage valve is fully closed. The drive stop control of the valve opening / closing drive source is performed.

According to a fifth aspect of the present invention, in the drain valve opening / closing control device according to the fourth aspect, the switch is turned on or off by the cam portion, and the drain valve opening / closing drive source control portion is When the on / off signal from the switch is received as a timing signal, during the opening operation of the drain valve, the preset time for the valve to be in the fully open position after receiving either the on or off timing signal. After that, the control for stopping the drive of the drain valve opening / closing drive source is performed.

Further, the invention according to claim 6 is the invention according to claim 4.
Alternatively, in the drainage valve opening / closing control device described in 5, the switch is turned on or off by the cam portion, and the drainage valve opening / closing drive source control portion receives an on / off signal from the switch as a timing signal. During the closing operation of the drain valve, a signal opposite to the on or off of the switch for controlling the drive stop of the drain valve opening / closing drive source during the opening operation of the drain valve is used as a timing signal. After receiving the timing signal, the control for stopping the driving of the drain valve opening / closing drive source is performed after a preset time when the drain valve is in the fully closed position.

The present invention is a device for controlling the opening / closing of a drain valve of a washing machine or the like, which opens / closes the drain valve by using the rotational force of a drain valve opening / closing drive source such as a motor, and the rotational force of the drive source. Is transmitted to the valve opening / closing operation section as a predetermined one-way rotational force by the one-way clutch mechanism.

Thus, when the drain valve is opened, the valve opening / closing section receives the rotational force of the motor as the drain valve opening / closing drive source through the reduction gear train. When the drain valve is fully closed from the position where the drain valve is fully opened, the drain valve is rotated in one direction with the rotation of the output shaft, and the drain valve is fully opened at the position rotated by a predetermined angle. By restarting the rotation in the same direction as when opening the drain valve, the valve opening / closing operation part rotates to the specified position, after that, the transmission of the rotational force of the output shaft is released, and the drainage is drained. The drain valve has a fully closed state at high speed by the return force of the valve to the fully closed state. During this operation, it does not instantly become a fully closed state, but it makes a fully closed state while rotating under the condition of receiving a constant braking force. Since the closing action is performed with sufficient force to obtain the state, the drain valve is not closed incompletely.

Further, if the one-way clutch function is achieved only by interposing a coil spring between the output shaft and the valve opening / closing operation portion, the structure of the one-way clutch mechanism is simple and the number of steps required for assembly can be reduced. .

Further, according to the present invention, a switch operated by a cam portion provided in the valve opening / closing operation portion is provided, and when the valve opening / closing operation portion performs an operation of opening the drain valve, a timing signal from this switch is provided. Based on the above, the drive stop control of the motor is performed so as to stop the valve opening / closing operation unit after the drain valve is fully opened.Therefore, control the valve opening / closing operation unit by simple time control. You can

Further, as a timing signal from the switch, a signal for turning on or off the switch is used, and after a preset time when the drain valve is in the fully open position after receiving the timing signal for turning on or off. When controlling to stop the drive of the motor, the switch may be a simple one that can be turned on or off, and drainage after receiving either the on or off signal from the switch. Since it suffices to set a preset time for the valve to be fully opened, the control content is simple and reliable motor drive stop control is possible.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. First, the structure will be described with reference to FIGS. 1, 2 and 3.

FIG. 1 is a side sectional view showing the construction of a drain valve opening / closing control device according to the present invention. Rotation of a rotor 1a of a drain valve driving motor (hereinafter simply referred to as a motor) 1 as a drain valve opening / closing drive source. The force is transmitted from the pinion 3 attached to the rotating shaft 2 to the output wheel 8 via the first wheel 4, the second wheel 5, the third wheel 6, and the fourth wheel 7. An output shaft 9 is attached to the output wheel 8, and a valve opening / closing operation unit 10 is attached to the output shaft 9.
Is attached. A reverse rotation preventing lever 4a is provided below the first wheel & pinion 4 in FIG. 1 so as to prevent the reverse rotation of the rotor 1a. Further, although the motor 1 is a small synchronous motor in this embodiment, it may be another motor such as a stepping motor or another drive source.

FIG. 2 is a view showing the valve opening / closing operation part 10 and a portion directly related to the same, which will be described further with reference to FIG.

The valve opening / closing operation part 10 is provided with a bearing hole 11 on the lower end side thereof, which has a diameter slightly larger than that of the output shaft 9 of the output wheel 8. Above the bearing hole 11 is a space up to the upper end opening. A coil spring support hole 12 having a diameter larger than that of the bearing hole 11 is provided. The coil spring 1 is placed in the coil spring support hole 12.
3 is press-fitted. The coil spring 13 is pressed into the coil spring support hole 12 so as to have a reduced diameter, and is supported by applying a force to the wall surface of the coil spring support hole 12 so as to spread the wall surface.

This coil spring 13 is used for the valve opening / closing operation unit 10.
Is provided in order to enable the one-way clutch to rotate with respect to the rotation of the output shaft 9, and as can be seen from FIG. 2, the tip end on the upper end side is directed inward toward the central axis direction of the coil spring 13. A protruding portion 13a formed by being bent is provided.

The valve opening / closing operation portion 10 has the bearing hole 1 in which the coil spring 13 is pressed into the coil spring support hole 12.
1 through the output shaft 9.

A holder 14 is attached to the tip end of the output shaft 9 penetrating the bearing hole 11 in this manner from the upper opening surface side of the valve opening / closing operation part 10. The holder 14 has a disk shape, and an output shaft mounting hole 15 into which the tip of the output shaft 9 is inserted is provided in the center of the holder 14. This holder 14
Rotates with the rotation of the output shaft 9, and in order to enable this, the cross-sectional shape of the tip of the output shaft 9 is not circular but is, for example, an oval having a linear portion, and the holder 14 is The output shaft mounting hole 15 side is also shaped to match it.

On the lower end side of the holder 14, the slit 1 into which the above-mentioned protruding portion 13a of the coil spring 13 is inserted.
4a is provided. When attaching the holder 14 to the output shaft 9, the tip of the output shaft 9 is inserted into the output shaft attachment hole 15 and the coil spring 1 is inserted into the slit 14a.
3 is attached while positioning so that the protruding portion 13a of 3 enters. Further, a screw hole 9a into which the tapping screw 16 is inserted is provided at the tip end of the output shaft 9, and the head of the tapping screw 16 (output shaft mounting) is inserted by inserting and tapping the tapping screw 16 into the screw hole 9a. The holder 14 is fixed to the output shaft 9 by having a larger outer diameter than the hole 15. The end of the coil spring 13 on the lower end side is
It is in a free state where it is not engaged anywhere.

This valve opening / closing operation section 10 has a cylindrical portion 17 and a disc portion 18 provided on the upper end side thereof in appearance, and a rod engaging portion 19 projecting upward from the outer periphery of the disc portion 18 in FIG. And the rod 2 engaged with the rod engaging portion 19.
It has a configuration having 0 and. The cylindrical portion 17 is
In FIG. 2, it comprises a lower cam portion 17a and an upper coil spring holding portion 17b.

The cam 17a is a portion which functions as a cam and is provided with a recess 17c. This cam portion 17a
Indicates that the convex portion Q of the movable contact piece s1 of the switch sw shown in FIG.
The switch sw is turned on or off by rotating. The relationship between the rotation of the valve opening / closing operation unit 10 and the on / off state of the switch sw, and the drain valve opening / closing operation due to the rotation will be described later. 3 is a plan view of FIG. 1 viewed from the direction of arrow A,
To make it easier to understand the function of the switch sw as the cam of the cam portion 17a with respect to the movable contact piece s1, the valve opening / closing operation portion 10 is shown as a cross section of the cam portion 17a of the cylindrical portion 17.

Such a valve opening / closing operation section 10 has the output shaft 9
When the rod engaging portion 19 rotates by receiving the rotation of
The rod 20 engaged with is reciprocated linearly.
A drain valve mechanism (not shown) is present at the other end of the rod 20, and the drain valve can be opened and closed by the linear reciprocating motion of the rod 20.

The drain valve to be controlled is constantly applied with a force to return it to the fully closed state, and when the drain valve is opened, the force to return to the fully closed state is applied. In contrast, the rod 20 operates in the direction of arrow x in FIG. 1 so as to pull the drain valve, and conversely, when the drain valve in the fully open state is fully closed, the rod 20 returns to the fully closed state. It receives a force to move and moves in the direction of arrow x'in FIG. Since such a drain valve mechanism itself is not the gist of the present invention, its illustration and description are omitted.

By the way, the coil spring 13 functions as a one-way clutch for transmitting the rotational force of the output shaft 9 to the valve opening / closing operation portion 10 in a releasable manner, which will be described below.

The protrusion 13a provided at the tip of the coil spring 13 has the slit 1 of the holder 14 as described above.
4a and both are in an engaged state. Also,
Since the holder 14 and the output shaft 9 are fixed by the tapping screw 16, when the output shaft 9 rotates in the W direction shown by the arrow in FIG. 2, the holder 14 and the coil spring 13 also rotate in the W direction at the same time. As the coil spring 13 rotates, the frictional force between the coil spring 13 and the wall surface of the coil spring support hole 12 of the valve opening / closing operation unit 10 (the coil spring 13
The rotation of the output shaft 9 is transmitted to the valve opening / closing operation unit 10 by the frictional force due to the force of increasing the diameter. As a result, the valve opening / closing operation unit 10 rotates as the output shaft 9 rotates.

Since the restoring force for the rod 20 to return to the fully closed state acts strongly on the rotation of the output shaft 9 in the W direction, the coil spring 13 acts so that its diameter is further increased. . Therefore, the valve opening / closing operation unit 10 is completely integrated with the output shaft 9 and is reliably rotated by the motor 1 in the W direction.

When the output shaft 9 rotates in the W direction, the valve opening / closing operation unit 10 receives the rotational force of the output shaft 9 and rotates in the W direction. ) Rotation is to be blocked. That is, the coil spring 13 has one end (projection portion 13a) side engaged with the holder 14, and when a force in the direction opposite to the rotation of the output shaft 9 in the W direction is applied to the valve opening / closing operation 10, the coil spring 13 is pressed. Has a force to increase its diameter.

As a result, the frictional force between the coil spring 13 and the wall surface of the coil spring support hole 12 becomes larger, and the output shaft 9 and the valve opening / closing operation part 10 are completely integrated. However, since the reverse rotation prevention lever 4a prevents the reverse rotation, the valve opening / closing operation unit 10 is prevented from rotating in the reverse direction. Therefore, when the drain valve is fully closed and fully opened, the valve opening / closing operation unit 10 can be stopped in the fully open state against the return force of the drain valve to the fully closed state.

On the other hand, the valve opening / closing operation section 10 has a force in the same direction (= W direction) as the rotation of the output shaft 9 (= W direction) (like the restoring force of the drain valve to the fully closed state, the coil spring 13 and the coil spring support hole). When a force larger than the frictional force with the wall surface of 11 is applied, the force causes the valve opening / closing operation unit 10 to slide and rotate on the side surface of the coil spring 13.

Therefore, when the drain valve is fully closed from the fully open state, the valve opening / closing operation portion 10 is rotated in the rotating direction of the output shaft 9 (= W direction) by the return force of the drain valve to the fully closed state. In addition, the output shaft 9 can be rotated quickly regardless of the rotation, and the drain valve can be immediately put into the fully closed state. At this time, the valve opening / closing operation unit 10 rotates while receiving a constant braking force due to the frictional force existing between the valve opening / closing operation unit 10 and the coil spring 13. The opening / closing control operation of the drain valve will be described in detail later.

Next, the switch sw will be described with reference to FIG. The switch sw is composed of a movable contact piece s1 and a fixed contact piece s2, and a convex portion Q is provided at the tip of the movable contact piece s1.
Is provided, and the convex portion Q is the cylindrical portion 1 of the valve opening / closing operation portion 10.
7 is arranged so as to come into contact with the cam portion 17a.

Then, by rotating the valve opening / closing operation part 10, the movable contact piece s1 is provided in the concave portion 1 provided in the cylindrical part 17.
When it falls to 7c, the movable contact piece s1 is separated from the fixed contact piece s2 and the switch sw is turned off. And
From this state, when the valve opening / closing operation part 10 rotates, it gradually climbs up from the concave portion 17c onto the side surface of the cam portion 17a and reaches the position where the convex portion Q is located. The piece s1 comes into contact with the fixed contact piece s2, and the switch sw is turned on.

Since the switch sw outputs the ON or OFF signal as a timing signal for stopping the motor 1 which is being rotationally driven, the switch sw is hereinafter referred to as a timing switch sw. That is, when the valve opening / closing operation unit 10 is rotating, it serves as a reference for performing control to start rotation from a certain position and reliably stop at a fixed position rotated by a predetermined angle. It generates timing.
An ON or OFF signal is used as the timing signal that serves as the reference. This specific operation will be described later.

FIG. 4 is a block diagram for explaining the electric control for the motor 1. The drain valve opening / closing drive source control unit (hereinafter referred to as the motor control unit) 31 is composed of a microcomputer or the like, and the drive control for the motor 1 is performed. As one of the drive controls, the ON or OFF signal from the timing switch sw is received, and the drive of the motor 1 is time-controlled based on the reception timing of the ON or OFF signal.

For example, when a signal indicating the start of drainage is received, the rotation of the motor 1 is started and the valve opening / closing operation section 10 is rotated so as to open the drainage valve. At this time, the drainage valve is fully opened. At this point, the rotation of the motor 1 must be temporarily stopped and the drain valve must be kept fully open for a predetermined time. When performing such control, the timing for temporarily stopping the rotation of the rotating motor 1 is obtained by the on (or off) signal from the timing switch sw.

That is, assuming that the motor 1 rotates to open the drain valve, and the valve opening / closing operation unit 10 also starts to rotate, the valve opening / closing operation unit 10 starts rotating soon after. , The timing switch sw is set to be turned on (or off), the signal that the timing switch sw is turned on (or off) is received, and the drain valve is fully opened from the time it is turned on (or off). The time t1 until it becomes is obtained in advance. Then, after the timing switch sw is turned on (or off), t
It is set to stop the rotation of the motor 1 after 1 hour. As a result, the valve opening / closing operation unit 10 can be reliably stopped at a predetermined position after the drain valve is fully opened.

Next, a specific operation of the drain valve control device according to the embodiment of the present invention will be described.

FIG. 5 illustrates the relationship between the rotation angle of the valve opening / closing operation part 10 (position of the rod engaging portion 19) and the opening / closing state of the drain valve with respect to the driving state of the motor 1.
0 is schematically shown.

First, when the rod engaging portion 19 is at the position p0 (bottom dead center), the drain valve is fully closed,
At this time, the rotation angle of the valve opening / closing operation unit 10 is 0 degree.
When the drain valve is opened in this state, the motor controller 31 gives a drive signal to the motor 1. As a result, the motor 1 starts rotating, and the valve opening / closing operation unit 10 starts rotating in the direction of arrow W in FIG. Then, when the valve opening / closing operation section 10 rotates by 10 degrees (the rod engaging section 19 is at the position of p1), the timing switch sw.
Is turned on.

The ON signal from the timing switch sw is sent to the motor control unit 31, and the motor control unit 31 starts counting time from the time when the ON signal is received. On the other hand, the valve opening / closing operation 10 continues to rotate further, and when the rod engaging portion 19 rotates 20 degrees from the position p0 (position p2), the drain valve starts to open. The motor 1 continues to rotate further, whereby the valve opening / closing operation unit 1
0 continues to rotate further. When the valve opening / closing operation unit 10 continues to rotate further, the drain valve is opened, and eventually the drain valve is fully opened.

When the rod engaging portion 19 reaches the position of p3 which is rotated 165 degrees from the position of p0, the motor control unit 31 stops the driving of the motor 1. That is, the motor control unit 31 starts counting the time from the time when the ON signal from the timing switch sw is received, and stops the driving of the motor 1 when counting a predetermined constant time (t1 time). . At this time, the rod engaging portion 19 is at the position p3.

The fixed time t1 is set in advance based on the time sufficient for the drain valve to be fully opened from the time when the ON signal is received from the timing switch sw. Note that the drain valve actually opens fully at an earlier time, but with a sufficient margin, the motor 1
Stop driving. Further, the position of p3 where the rotation of the motor 1 stops is before the top dead center, and the force to pull back in the direction opposite to the arrow W is applied to the valve opening / closing operation unit 10 by the return force of the drain valve to the fully closed state. work. However, at this time, the valve opening / closing operation part 10 is prevented from rotating in the direction opposite to the arrow W direction, so that the motor 1 operates in the rod engagement part 1
The stop state is maintained while leaving 9 at the position p3.

In this state, when the motor controller 31 is instructed to drain the water and close the drain valve again, the motor controller 31 outputs a signal for driving the motor 1.
As a result, the motor 1 resumes rotation, and the valve opening / closing operation unit 1
In 0, the rod engaging portion 19 starts rotating from the position of p3.
Then, when the rod engagement 19 reaches the top dead center (the position of p4 rotated 180 degrees from p0) and reaches the position slightly past the top dead center (the position of p5 rotated about 200 degrees from p0), The return force of the drain valve to the fully closed state begins to work sufficiently. Then, the valve opening / closing operation section 10 is pulled by the restoring force and rotates at a considerable speed, and the rod engaging section 19 moves to p7.
Position (position of 340 degrees from p0) is reached.

When the rod engaging portion reaches the position p7, the drain valve is fully closed. In this way, when closing the drain valve, the valve opening / closing operation unit 10 is rotated at a high speed and a force of a certain level or more is applied to bring the valve into a fully closed state. This is because when the drain valve is closed, it is possible to obtain a more fully closed state by applying a force of a certain level or more and closing it instantaneously. However, in this embodiment, since a constant frictional force is generated, the impact noise as in the conventional case is not generated.

It should be noted that the rod engaging portion 19 is pulled from the position slightly past the top dead center (the position of p5) by the restoring force of the drain valve to the fully closed state, and before reaching the position of p7, p6. The timing switch sw is turned off when the position (the position from p0 to 320 degrees) is reached.

The OFF signal from the timing switch sw is sent to the motor control unit 31, and the motor control unit 31 starts counting time from the time when the OFF signal is received. On the other hand, the valve opening / closing operation part 10 continues to rotate further, and when the rod engaging part 19 rotates 360 degrees (one rotation) from the position of p0, the motor control part 31 stops the driving of the motor 1. That is, the motor control unit 31 starts counting the time from the time when the OFF signal from the timing switch sw is received, and the predetermined time (t2).
The driving of the motor 1 is stopped when (time) is counted. This position is the position where the rod engaging portion 19 is p0,
In other words, it is the bottom dead center.

The fixed time t2 is set based on the time taken for the rod engaging portion 19 to reach the position p0 (bottom dead center) from the time when the off signal is received from the timing switch sw, which is measured in advance. . The drain valve is fully closed at a position earlier than the bottom dead center, and the drain valve is pushed in to ensure a fully closed state.

By the way, from the position of p5 slightly past the top dead center to the position of p7 where the drain valve is fully closed, as described above, the drain valve is pulled by the restoring force to the fully closed state, and the valve is closed. The open / close operation unit 10 rotates at high speed.
This is made possible by the one-way clutch mechanism using the coil spring 13.

That is, as described above, the valve opening / closing operation portion 10 is configured to transmit the rotational force of the output shaft 9 by the one-way clutch by the coil spring 13 so as to be detachable. In FIG. 5, the output shaft 9 is from p0 to p4.
Is transmitted to the valve opening / closing operation unit 10 via the coil spring 13 and rotates in one direction to rotate in the arrow W direction. However, after the position of p4 has passed, if a restoring force to the fully closed state of the drain valve is applied to the rod engagement portion 19,
The wall surface of the coil spring support hole 12 of the valve opening / closing operation unit 10 slides on the side surface of the coil spring 13 and rotates.

As described above, when a large force (more than the frictional force between the coil spring 13 and the wall surface of the coil spring supporting hole 12) acts on the valve opening / closing section 10 in the rotating direction, the output shaft 9 rotates. With the force released, the valve opening / closing operation unit 10
The valve opening / closing operation unit 10 starts to rotate by a large force (returning force to the fully closed state of the drainage valve) of a certain level or more that acts in the rotation direction of.

As a result, the valve opening / closing operation 10 rotates at a high speed and the drain valve can be immediately put into the fully closed state. When the valve opening / closing operation 10 is rotated at a high speed and the drain valve is fully closed, the valve opening / closing operation unit 10 is certainly operated.
Rotates at a high speed to a position where the drain valve is fully closed, but the wall surface of the coil spring support hole 12 of the valve opening / closing operation 10 slides on the side surface of the coil spring 13 and rotates. Therefore, the valve opening / closing operation unit 10 rotates at high speed while receiving a constant braking force due to a certain frictional force existing between the wall surface of the coil spring support hole 11 and the coil spring 13. Therefore, a large impact sound is not generated unlike when the drain valve is closed at once in a free state by the pulling force only by the restoring force of the drain valve to the fully closed state. In addition, since the rotation speed of the drain valve to the fully closed state can achieve a rotation speed above a certain level, a reliable fully closed state can be obtained.

FIG. 6 is a diagram showing the above-described operation as a diagram. In the initial state, the rod engaging portion 1
9 is at the bottom dead center (position of p0), and when the motor 1 starts driving from this state, the convex portion Q of the movable contact piece s1 of the timing switch sw causes the cam portion 17a of the valve opening / closing operation portion 10 to move. Timing switch s is provided in the recess 17c.
w is off. When the valve opening / closing operation part 10 starts to rotate due to the rotation of the motor 1, the convex portion Q of the movable contact piece s1 of the timing switch sw gradually climbs from the recessed part 17c of the cam part 17a of the valve opening / closing operation part 10 to the side surface part. When the valve opening / closing operation section 10 has rotated 10 degrees (the rod engagement section 19 is at the position p1), the timing switch sw is turned on.

The valve opening / closing operation portion 10 continues to rotate,
When the rod engagement portion rotates 20 degrees from the position p0 (position p2), the drain valve starts to open, the motor 1 continues to rotate further, and the valve opening / closing operation unit 10 also continues to rotate, the drain valve is in the fully open state. Become. After that, when the rod engaging portion 19 reaches the position of p3, the motor controller 31 stops driving the motor 1. That is, the motor 1 is stopped t1 hours after the timing switch sw is turned on.

Then, for a while, the rod engaging portion 19
Holds the stopped state at the position of p3 (drain valve fully open state), and when a command is issued to the motor control unit 31 to finish draining and close the drain valve again, the motor control unit 31 drives the motor 1. To output the signal. As a result, the motor 1 resumes rotation, the valve opening / closing operation unit 10 also resumes rotation,
The rod engaging portion 19 starts moving from the position of p3. When the rod engaging portion 19 reaches the position of p5 slightly past the top dead center (position of p4), the drain valve is pulled by the return force to the fully closed state, and the valve opening / closing operation part 10 rotates at high speed. Then, the rod engaging portion 19 immediately reaches the position of p7.
When the rod engaging portion 19 reaches the position p7, the drain valve is fully closed. The timing switch sw is
It has already turned off when the position of p6 (position of 320 degrees from p0) before reaching the position of p7 is reached.

When the rod engaging portion 19 reaches the position p7, the restoring force of the drain valve which is applied to the rod engaging portion 19 to the fully closed state disappears, and thereafter, the valve opening / closing operation portion 10 is rotated by the rotation of the motor 1. The rod engaging portion 19 is further rotated.
When is rotated 360 degrees (one rotation) from the position of p0, the drive of the motor 1 is stopped by the control of the motor control unit 31. That is, the motor 1 uses the timing switch sw.
The control is performed such that it is stopped after t2 hours from the time when is turned off.

The above is the operation for one cycle in which the valve opening / closing operation unit 10 makes one rotation to change from the drainage stopped state to the drainage state and again to the drainage stopped state.

In the above-described embodiment, the coil spring 13 is interposed between the output shaft 9 that outputs the rotation of the motor 1 and the valve opening / closing operation unit 10 that controls the opening / closing of the drain valve. A one-way clutch mechanism is provided by utilizing the frictional force between the opening / closing operation section 10. As a result, the opening / closing control of the drain valve can be reliably performed with an extremely simple structure. In addition, when the drain valve is fully closed, the valve opening / closing operation unit 10 is rotated by sliding on the side surface of the coil spring 13, so that the resistance to the fully closed state of the drain valve causes resistance. since no force is often once closed with no free state, without generating an impact noise when closed, it can be gently drain valve is fully closed.

Further, the stop control of the motor 1 is performed by using the ON and OFF signals of the timing switch sw to stop the rotation of the motor 1 by the time control from the time of turning on or off. Therefore, since the stop position control of the valve opening / closing operation unit 10 can be performed only by using the ON or OFF signal obtained from one switch, the timing switch is a simple ON-state that can obtain the ON and OFF states. The cost can be reduced, and the signal processing can be simple, since only an off switch is used.

Since the on / off of the timing switch sw is used only to determine the starting point for performing the time control, the on / off may be reversed from the above example. That is, in the above example, the timing switch sw is turned on at the position p1, the motor 1 is stopped t1 hours after the ON signal, the timing switch sw is turned off at the position p6, and the off signal is used for the time t2. Although the motor 1 is stopped later, the motor 1 is turned off at the position p1, the motor 1 is stopped at time t1 after this off signal, the timing switch sw is turned on at the position p6, and the time signal is used for t2 time. The motor 1 may be stopped later.

In the drain valve opening / closing control device of this embodiment, the stroke of the rod 20 is set to 30 mm and the motor 1
The half-rotation time of the valve opening / closing operation unit 10 is about 5 seconds at 50 Hz and 4.2 seconds at 60 Hz. Also, the position P
The time from the start of the operation of the one-way clutch of No. 5 to the position P7 is about 0.2 seconds, which is considerably high speed, but the braking is considerably effective as compared with the device of JP-A-6-79093. Has become.

The above-described embodiments are examples of preferred embodiments of the present invention, but the present invention is not limited to these, and various modifications can be made without departing from the gist of the present invention. Is. For example, the mechanism for enabling the valve opening / closing operation unit 10 to operate the one-way clutch may be a ratchet type although the operation sound is somewhat difficult. Further, as a one-way clutch using a coil spring, the output shaft 9 and the valve opening / closing operation unit 10 may be integrated in the winding tightening direction instead of in the spring expanding direction.

Further, in the above-described embodiment, the off signal of the timing switch sw is used during the operation of closing the drain valve, and after a certain period of time from the off signal (the rod engaging portion 19).
The control such as stopping the driving of the motor 1 is performed at the time of reaching the bottom dead center). However, for example, the drain valve is completely closed without performing the time control using the off signal. The position to be in the state is previously checked, and the rod engaging portion 1
When 9 passes that position, the timing switch sw
May be turned off, and the off signal of the timing switch sw may be used as it is to stop the motor 1 at the same time when the timing switch sw is turned off.

Further, the stop in the fully closed state may be stopped at the position stopped by the restoring force of the drain valve without using the signal of the timing switch sw at all.
At this time, it is preferable that the motor 1 is stopped immediately after passing the position P5 after the driving is started.

Further, the drain valve opening / closing control device employing the one-way clutch can also be applied to a device for performing operations other than valve opening / closing. That is, the one-way clutch of the present invention can be adopted in the output shaft portion of the device having the electromagnetic clutch as disclosed in Japanese Utility Model Laid-Open No. 1-121591. In addition, the one-way clutch type control circuit does not perform time control, but stops the micro switch and the cam twice during one rotation, or performs time control for the stop in the open state and the time control. Various circuit systems can be adopted, such as a combination of three contact pieces and a cam for the stop at the closing.

[0073]

As described above, in the drain valve opening / closing control device according to the first aspect of the present invention, the rotational force of the motor as the drain valve opening / closing drive source is set as the rotational force in only one direction predetermined by the one-way clutch mechanism. It is transmitted to the opening / closing operation section. As a result, when the drain valve is opened, the valve opening / closing operation part rotates in one direction with the rotation of the output shaft, and performs an operation of fully opening the drain valve at a position rotated by a predetermined angle. When the drain valve is closed from the position in which the drain valve is in the fully open state , the drain valve can be brought into the fully closed state at high speed by the restoring force of the drain valve to the fully closed state.
As described above, according to the present invention, by using the one-way clutch mechanism having a simple structure, the drain valve is changed from the fully closed state to the fully opened state and then the fully closed state again while the valve opening / closing operation portion makes one rotation. The opening and closing cycle of can be realized.

Further, according to the second aspect of the invention, since the one-way clutch mechanism is constructed by using the coil spring, the structure is simple, the number of assembling steps is small, and the one-way clutch operation is reliable.

Further, according to the third aspect of the invention, when the drain valve is changed from the fully open state to the fully closed state, the drain valve has a restoring force to the fully closed state at a high speed to fully close the drain valve. In the above, since the valve is not fully closed all at once, but is closed while rotating the valve opening / closing operation part with a constant braking force, a large impact sound is not generated. Moreover, since the closing operation is performed with a force sufficient to obtain a reliable fully closed state, the drain valve is not closed in an incomplete state.

Further, the drain valve control device according to claim 4 is
A switch that is operated by a cam unit provided in the valve opening / closing operation unit is provided, and when the valve opening / closing operation unit performs the operation of opening the drain valve, the valve opening / closing operation unit is opened based on the timing signal from this switch. Since the drive stop control of the motor is performed so that the drain valve is stopped after the fully opened state, the control of the valve opening / closing operation section can be performed by simple time control.

According to the fifth aspect of the present invention, a switch on or off signal is used as the timing signal from the switch, and the drain valve is in the fully open position after receiving the on or off timing signal. Since the control is to stop the driving of the motor after a preset time, the switch may be a simple one that can be turned on or off, and either the on or off state from the switch can be used. Since it is only necessary to set the preset time for the valve to fully open after receiving the signal, the control contents can be controlled with simple and reliable motor drive stop.

Furthermore, the invention according to claim 6 uses the on / off timing signal from the switch even during the operation of closing the drain valve in the open state, and after receiving the timing signal, drainage is performed. Since the control to stop the motor drive is performed after a predetermined time after the valve is fully closed, it is possible to reliably perform the motor stop control even after the drain valve is fully closed. it can. In this case, for example, if the ON signal from the switch is used as the timing signal for stopping the drive of the motor after the drain valve is in the fully open position, the motor will be released after the drain valve is fully closed. It means that the off signal of the switch may be used as the signal for stopping the driving of the. Therefore, it suffices to use only one on / off switch as the switch, and when the valve opening / closing operation section rotates one cycle of the drain valve operation, the on / off signal can be taken out at a predetermined timing. By doing so, the on / off, on / off switching cycle of the switch can be used as it is, and the control for extracting the timing signal for time control can be made extremely simple.

[Brief description of drawings]

FIG. 1 is a side sectional view illustrating a configuration of a drainage valve opening / closing control device that is an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a valve opening / closing operation section and portions related to the valve opening / closing operation section in the drain valve control apparatus shown in FIG.

FIG. 3 is a plan view of the drain valve control device shown in FIG.
It is the figure which showed only the cam part in cross section about the valve opening / closing operation part.

FIG. 4 is an electrical configuration diagram for explaining motor drive control in the drain valve opening / closing control device according to the embodiment of the present invention.

FIG. 5 is a diagram schematically showing the movement of the valve opening / closing operation part for explaining the operation of the drainage valve opening / closing control device according to the embodiment of the present invention.

FIG. 6 is a diagram for explaining the operation of the drainage valve opening / closing control device according to the embodiment of the present invention.

[Explanation of symbols]

1 motor (drain valve open / close drive source) 9 Output shaft 10 Valve opening / closing section 12 Coil spring support hole 13 coil spring 14 Holder 17 Cylindrical part 17a cam part 17b Coil spring holding part 17c recess 19 Rod engaging part 20 rod 31 Motor control unit sw switch (timing switch) s1 movable contact piece

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshinori Shinohara 3601-14 Zakoji, Iida City, Nagano Prefecture (56) References JP-A-6-79093 (JP, A) Sankaihei 1-136729 (JP, U) ( 58) Fields investigated (Int.Cl. ⁷ , DB name) F16K 31/00-31/05

Claims (6)

(57) [Claims] 1. A drainage valve opening / closing control device for opening / closing a drainage valve receiving a restoring force to a fully closed state by using the rotation force of a drainage valve opening / closing drive source, wherein Is transmitted, a rotating member that rotates by receiving the rotational force of the output shaft , and a rotating member.
A valve opening / closing operation part having a rod that opens and closes the drain valve by receiving a rotational force of a rolling member to perform a linear reciprocating motion , and a rotational force of the output shaft can be connected to and released from the valve opening / closing operation part. anda one-way clutch mechanism for transmitting the said valve opening and closing operation unit, when the drain valve opened, the rotational force of the output shaft is transmitted by the one-way clutch mechanism, the rotary member is one Rotate in direction
And the rod has a fully closed state of the drain valve.
In the forward movement against the return force to the rotating member, the rotating member performs an operation to fully open the drain valve at a position rotated by a predetermined angle, and when the drain valve is fully closed from that state , With the rotation of the output shaft, the rotating member causes the drain valve to
The resumes rotating in the same direction as when the open state, reaches a predetermined rotational position, the transmission of the rotational force from <br/> Therefore the output shaft in the one-way clutch mechanism is released, the return By the force, the rod moves back and
The rotating member is in the same direction as when the drain valve is opened.
A drain valve opening / closing control device characterized by rotating to . 2. The one-way clutch mechanism comprises a coil spring interposed between the output shaft and the valve opening / closing operation portion, and a frictional force generated by an elastic force acting in a radial direction of the coil spring causes the output shaft to move. When the rotational force is transmitted to the valve opening / closing operation part and the drain valve is opened, the drain valve operates in a direction opposite to the rotation direction of the output shaft with respect to the valve opening / closing operation part. When a restoring force is applied to the output shaft, the output shaft and the valve opening / closing operation unit are integrated due to an increase in frictional force due to a change in the diameter of the coil spring, and the rotational force in one direction of the output shaft is transmitted to the valve opening / closing operation unit. However, when the drain valve is changed from the fully open state to the fully closed state, when a restoring force to the fully closed state of the drain valve that acts in the same direction as the rotation direction of the output shaft is applied to the valve opening / closing operation unit, ,
2. The drainage valve opening / closing control according to claim 1, wherein the valve opening / closing operation portion is slidably rotatable with respect to the coil spring by reducing a frictional force due to a change in a direction opposite to a change in the diameter of the coil spring. apparatus. 3. The valve opening / closing operation section is rotated with respect to the rotation of the output shaft by the return force to the fully closed state of the drain valve, which acts in the same direction as the rotation direction of the output shaft with respect to the valve opening / closing operation section. 3. The drainage valve opening / closing control device according to claim 2, wherein when the sliding rotation is allowed, the drainage valve opening / closing control device is rotated in a state of receiving a constant braking force due to a frictional force acting between the coil spring and the coil spring. 4. A drainage valve opening / closing control device for opening / closing a drainage valve receiving a restoring force to a fully closed state by using the rotation force of a drainage valve opening / closing drive source, wherein the rotation force of the drainage valve opening / closing drive source is The output shaft to be transmitted and the output shaft are rotated by receiving the rotational force of the output shaft, and the rotational force is output as a linear reciprocating motion to perform the opening / closing operation of the drain valve, and the rotation of the output shaft. A valve opening / closing operation part having a cam part that rotates in a rotating manner, a switch that is actuated by the cam part of the valve opening / closing operation part to generate a timing signal during the rotating operation of the valve opening / closing operation part, and the drain valve opening / closing drive source Drainage valve opening / closing drive for performing drive control of the drainage valve opening / closing drive source after a predetermined time when a timing signal from the switch is received as one of the drive controls. Source system The valve opening / closing operation part has a control part and, when the drain valve is opened,
When the rotational force of the output shaft is transmitted to rotate in one direction and the drain valve is fully opened at a position rotated by a predetermined angle, the output is set when the drain valve is fully closed from that state. When the shaft is rotated, the rotation is restarted, and when it reaches a predetermined rotation position, the transmission of the rotational force from the output shaft is released, and the drain valve rotates to the fully closed state to rotate the drainage. Performing an operation of fully closing the valve, the drainage valve opening / closing drive source control unit, at least when the valve opening / closing operation unit performs an operation of fully opening the drainage valve, outputs a timing signal from the switch. When you receive
Using the timing signal, drive stop control of the drain valve opening / closing drive source is performed so as to stop the valve opening / closing operation part at a predetermined position after the drain valve is fully opened, and the drain valve is opened from the fully open state. When fully closed, the drive of the drainage valve opening / closing drive source is restarted to rotate the valve opening / closing operation part in the same direction as the rotation direction, and the drainage valve is placed at a predetermined position after being fully closed. A drainage valve opening / closing control device, wherein drive stop control of a drainage valve opening / closing drive source is performed so as to stop the valve opening / closing operation unit. 5. The switch is turned on or off by the cam portion, and the drain valve opening / closing drive source control portion receives an on or off signal from the switch as a timing signal, During the opening operation of the drain valve, the drive of the drain valve opening / closing drive source is stopped after a preset time when the drain valve is in the fully open position after receiving a timing signal of either on or off. The drainage valve opening / closing control device according to claim 4, which is controlled. 6. The switch is turned on or off by the cam part, and the drain valve opening / closing drive source control part receives an on or off signal from the switch as a timing signal, During the closing operation of the drain valve, a signal opposite to ON or OFF of the switch for controlling the drive stop of the drain valve opening / closing drive source during the opening operation of the drain valve is used as a timing signal. The control for stopping driving of the drain valve opening / closing drive source is performed after a preset time when the drain valve is in the fully closed position after receiving the timing signal. Drain valve opening / closing control device.