JPH06296792A - Water supplying and draining device for washing machine - Google Patents

Abstract

PURPOSE:To unify driving mechanisms for valve mechanisms and reduce the cost by positioning the movable part of a feed valve mechanism and the movable part of a drain valve mechanism along the reciprocating locus so that both the valves are in the closed state in one of three positions, only the feed valve mechanism is in the opened state in another one, and only the drain valve is in the opened state in the remaining one. CONSTITUTION:A command is given to a geared motor 22 to operate a feed valve mechanism 14 and a drain valve mechanism 16, and the water feed or draining to a washing tank is operated. The movable part 20 of the feed valve mechanism 14 and the movable part 21 of the drain valve mechanism 16 are situated along the reciprocating orbit in such a manner as to be driven by a driving member 23 so that both the valve mechanisms 14, 16 are in the closed state in one of three positions, only the feed valve mechanism 14 is in the opened state in another one, and only the drain valve mechanism 16 is in the opened state in the remaining one. Thus, both the mechanisms 14, 16 can be operated by one geared motor 22, and the cost for the constitution related to the drive of the valve mechanisms 14, 16 can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine water supply / drainage device for supplying water to a washing tub and draining water from the washing tub.

[0002]

2. Description of the Related Art A water supply pipe for supplying water to a washing tub is provided with a water supply valve mechanism having a movable part for opening and closing, and a water distribution pipe for draining water from the washing tub is opened and closed for operation. A drainage valve mechanism with a movable part is provided, and each valve mechanism is provided with a separate drive device and a control command is given to them to remotely control the water supply to the washing tub and the drainage from the washing tub. I am able to do it.

[0003]

In the conventional water supply / drainage device for a washing machine, since each valve mechanism is individually provided with a drive device, there is a problem that the drive device costs two.

The present invention has been made in order to solve the above-mentioned problems (technical problems) of the prior art, so that the mechanism relating to the drive of the water supply valve mechanism and the drainage valve mechanism can be unified to reduce the cost. The purpose of the present invention is to provide a water supply / drainage device for a washing machine.

[0005]

To achieve the above object, in a water supply / drainage device for a washing machine according to the present invention, a water supply valve mechanism having a movable part for opening and closing a water supply pipe for supplying water to a washing tub. A drainage valve mechanism having a movable part for opening and closing is provided in a water distribution pipe for draining water from the washing tub, and each movable part is operated by a drive device. In the water supply / drainage device of a machine, the drive device includes a geared motor configured to stop a reciprocating drive member at three positions of a forward movement position, a backward movement position, and an intermediate position thereof, and the movable water supply valve mechanism is movable. The part and the movable part of the drainage valve mechanism are in the closed state in both of the valve mechanisms in one of the three positions, in the other one only the water supply valve mechanism is in the open state, and in the other one. Is only the drain valve mechanism As the open state, in which is positioned to be capable along a reciprocation path of the driven by the drive member.

[0006]

When the drive member is in one of the forward position, the intermediate position and the backward position, both the water supply valve mechanism and the drain valve mechanism are closed. When an actuation command is given to the geared motor to move the drive member to another position, only the water supply valve mechanism is opened. When another actuation command is given to the geared motor to move the drive member to the remaining one position, only the drain valve mechanism is opened.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1 schematically showing the internal structure of the one-tub type washing machine,
1 is a washing tub, 2 is its drainage port, 3 is a dewatering tub, 4 is a pulsator, 5 is a motor, 6 is a belt, 7 is a clutch, and the rotational power of the motor 5 is transmitted only to the dewatering tub 3 or to the dewatering tub 3. By switching to both of the pulsators 4, washing and dehydration are performed respectively. Next, reference numeral 8 denotes a water supply / drainage device, which includes a water supply mechanism 9 composed of a water supply pipe 11 and a water supply valve mechanism 14 provided in the middle thereof, and a water supply mechanism 10 composed of a drainage pipe 15 and a drainage valve mechanism 16 provided in the middle thereof. And a drive device 17 for driving both valve mechanisms 14 and 16. 12 is a well-known faucet, and 13 is a water supply port. The water supply mechanism 9 is provided with a water supply port in a part of the washing tub 1 as indicated by reference numeral 13a, and the water supply valve mechanism 14 is provided.
A water supply pipe between the water supply port and the water supply port may be provided as indicated by reference numeral 11a.

Next, FIG. 2 showing the relationship among the water supply valve mechanism 14, the drainage valve mechanism 16 and the drive unit 17 will be described. First, in the water supply valve mechanism 14, 14a and 14b respectively indicate the existence of an inlet and an outlet of water, and the water supply pipe 11 is connected. Reference numeral 20 denotes a movable part for opening / closing operation, which can freely move back and forth in the directions of arrows 20a and 20b and is biased in the direction of arrow 20b and is in the state shown in the drawing in the normal state. In this state, the valve mechanism 14 is closed. Next, in the drain valve mechanism 16, 16a and 16b indicate the presence of an inlet and an outlet, respectively, and the drain pipe 15 is connected. Reference numeral 21 denotes a movable part for opening / closing operation, which is freely movable in the directions of the arrows 21a and 21b and is urged in the direction of the arrow 21b to be in the illustrated state in the normal state. In this state, the valve mechanism 16 is closed.

Next, the drive device 17 will be described. 22 indicates a geared motor, and 22a indicates the existence of the case.
Reference numeral 23 denotes a drive member in the geared motor 22, which is capable of reciprocating between the forward movement position shown in FIG. 2 and the backward movement position shown in FIG. 6, and the positions thereof and the gearing motor 22 shown in FIG. It is designed to be stopped at an intermediate position. Reference numeral 24 denotes a water supply valve driving body provided in a part of the driving member, 25 denotes a long hole for driving the drainage valve mechanism, and a wall 26 at one end thereof serves as a drainage valve driving portion.
27 is a switch driver, 28 is a switch for stopping and controlling the driving member at an intermediate position, and the relationship between the two is that the driving member 23 is driven in the forward position and between the forward position and the intermediate position. Body 27 closes switch 28 and drive member 23
Is in the intermediate position, the retracted position and the state between them, the switch 28 is opened. The driver 27 and the switch 28 may be provided in the case 22a. The movable part 20 of the water supply valve mechanism 14 is driven by the driving body 24 when the driving member 23 is in the intermediate position as shown in FIG.
It is arranged along the reciprocating locus so that it can be operated in the a direction. Further, as shown in FIG. 6, the movable portion 21 of the drainage valve mechanism 16 uses an auxiliary member 29 so that the movable portion 21 can be operated in the direction of the arrow 21a by the drive portion 26 when the drive member 23 comes to the retracted position. The drive member 23 is located along the reciprocating locus. That is, an auxiliary member composed of a rod
One end 29a of 29 is connected to the movable portion 21, and the other end 29b is positioned in the elongated hole 25 so that the driving portion 26 can drive it.

Next, FIG. 8 showing the mechanism of the geared motor 22 will be described. This mechanism is known (for example, Japanese Patent Laid-Open No.
-1659939), 32 is a motor which uses a permanent magnet for the rotor and whose rotation is restricted in a non-energized state, 33 is an output mechanism, and the drive member 23 (also referred to as forward / backward rod)
A gear 34 for driving the drive member 23 by meshing with the rack teeth 23a formed thereon, and a gear 35 that rotates integrally with the gear 34.
Equipped with. 36 is a transmission mechanism composed of a large number of reduction gears 37 to 40 for transmitting the rotation of the motor 32 to the gear 35, 41 is a clutch interposed in the middle of the transmission mechanism 36, a sun gear 42,
The planetary gear mechanism comprises a ring gear 43, a planetary gear 44 and a carrier 45 thereof. Reference numeral 46 denotes a stop mechanism for stopping energization to the motor 32 and stopping its rotation when the drive member 23 reaches the retracted position, and comprises a cam 47 and a switch 48 movably contacted with the cam 47. 50 is the clutch
The operating mechanism for operating 41 includes a rotating body 51 that rotates in conjunction with the ring gear 43, and an electromagnet 53 that includes an operating body 52 that operates to rotate and stop the rotating body. 53
a is an iron core, 53b is a coil, 53c is an attraction piece, and 53d is a release spring. Reference numeral 54 denotes a slow speed mechanism for gently returning the driving member 23, which rotates integrally with the fixed braking member 55 and the rotating body 51 and comes into contact with the braking member 55 by a centrifugal force to rotate the rotating body 51. And a member 56 for limiting the rotation speed.
Reference numeral 57 is a return mechanism for returning the drive member 23 from the intermediate position to the forward position, and comprises a lever 58 and a spring 59 for urging the lever 58 in the direction of the arrow in FIG.

In FIG. 3 showing the electric circuit of the water supply / drainage system, 62 is a well-known power plug, 63 is one switch for controlling the water supply / drainage system in the program timer, and 63a
Indicates a water supply side terminal, 63b indicates a drainage side terminal, and 63c indicates a common terminal. Reference numeral 64 is a diode for supplying a current for holding the electromagnet 53.

Next, the operation of the water supply / drainage device 8 will be described with reference to the progress of the washing program shown in FIG. When the washing machine is stopped, the water supply / drainage device 8 is in the state shown in FIG.
The circuit is in the state of FIG. That is, the switch 63 is in the neutral position and no current is supplied. When the washing program is started and the water supply process 71 is started, the switch 63 is switched to the water supply side terminal 63a. Then switch 28
When the motor 32 is energized and the electromagnet 53 is also energized via the switch 48, the motor 32 rotates and the clutch 41 is in the connected state, and the rotation of the motor 32 is transmitted to the output mechanism 33 via the transmission mechanism 36. As a result, the driving member 23 moves from the forward movement position shown in FIG. 2 toward the intermediate position shown in FIG. When the drive member 23 reaches the intermediate position, the drive member 24 causes the movable portion 20 of the water supply valve mechanism 14 to move.
Is driven, the valve mechanism 14 is opened, and water is supplied to the washing tub 1 through the water supply pipe 11. In the intermediate position, the switch 28 is opened and the circuit is in the state shown in FIG. In this state, the holding current is supplied to the electromagnet 53 through the diode 64 and the holding state is held, and the clutch 41 is held in the connected state. In this case, since only a half-wave current is supplied to the motor 32 through the diode 64, the motor 32 is stopped.

When a predetermined time elapses in the above state and the washing step 72 starts, the switch 63 becomes neutral and the electromagnet 53 is de-energized and the clutch 41 is disengaged. Then, the drive member 23 is returned to the forward position of FIG. 2 by the return mechanism 57, and the water supply valve mechanism 14 is closed. Then, in the step 72, the pulsator 4 is rotated by the motor 5 and the washing operation is performed for a predetermined time. During this washing process, the circuit is in the state of FIG.

When the washing step 72 is completed and the draining step 73 is started next, the switch 63 is switched to the drain side terminal 63b. Then, the motor 32 and the electromagnet 53 are activated, and the drive member 23 starts retreating. In this case, since the motor 32 is energized through the switch 48, the rotation is continued until the drive member 23 passes the intermediate position of FIG. 4 and reaches the retracted position of FIG. During this retreat, the drain valve drive unit 26 abuts against the end 29b of the auxiliary member 29 and pulls the auxiliary member 29, and in the retracted position of FIG. 6, the movable portion 21 is driven as shown in the drawing, and the drain valve mechanism 16 operates. It will be open. As a result, drainage is performed from the drainage port 2 through the drainage pipe 15. In the retracted position shown in FIG. 6, the switch 48 of the stop mechanism 46 is opened by the cam 47, and the circuit enters the state shown in FIG. That is, the holding current is supplied to the electromagnet 53 and the clutch 41 is held in the continuous state, while the motor 32 is stopped. Therefore, the drive member 23 is held in the retracted position. Next, in the dehydration step 74, the water supply / drainage device 8 is held in the state shown in FIG. 6, and the dehydration tank 3 is rotated by the operation of the motor 5 to perform well-known dehydration.

When the dehydration process 74 is completed, the next step is a water supply process 75. In this case, first, the switch 63 is once in a neutral state, the clutch 41 is disengaged by releasing the electromagnet 53, and the drive member 23 is returned from the retracted position in FIG. 6 to the advanced position in FIG. In this example, this return is performed from the retracted position to the intermediate position by the biasing force of the drain valve mechanism 16 in the direction of the arrow 21b, and from the intermediate position to the advanced position by the return mechanism 57 as described above. However, the driving member 23 may be provided with a return spring for returning it over the entire length from the retracted position to the advanced position, and the spring may be used. Next, the switch 63 is switched to the water supply side terminal 63a. As a result, similarly to the above description, the drive member 23 reaches the intermediate position in FIG. 4, and the water supply valve mechanism 14 is opened.

Next, a rinse step 76 is performed. This step is performed in the same manner as the above washing step 72. Thereafter, the above various steps are repeated according to a predetermined program, and when these programs are completed, the washing machine is stopped.

Next, in the drive device, a drive member that can freely reciprocate between an advancing position and a retreating position is stopped at three positions of an advancing position, a retracting position and an intermediate position thereof. Using a geared motor, the movable part of the water supply valve mechanism is located along the retracted position within the rotation trajectory of the drive member, and the movable part of the drainage valve mechanism is located along the advanced position so that the drive member is Both of the valve mechanisms may be closed in the intermediate position, only the water supply valve mechanism may be opened in the retracted position, and only the drain valve mechanism may be opened in the advanced position.

[0018]

As described above, according to the present invention, by supplying a command to the geared motor 22, the water supply valve mechanism 14 and the drainage valve mechanism 16 are operated by the geared motor 22 to supply water to the washing tub 1 or drain water therefrom. There is an effect that any of the above can be operated remotely.

Moreover, the water supply valve mechanism 14 and the drainage valve mechanism 16
Even if either of these can be operated remotely, the present invention, as the drive unit 17, stops the reciprocating drive member 23 at three positions of the forward movement position, the backward movement position and the intermediate position thereof. The movable part 20 of the water supply valve mechanism 14 and the movable part 21 of the drain valve mechanism 16 are provided.
Means that in one of the above three positions, the double valve mechanism 1
4 and 16 can be driven by the drive member 23 so that only the water supply valve mechanism 14 is opened in the other one and only the drain valve mechanism 16 is opened in the other one. Since the structure is located along the reciprocating locus, any one mechanism can be operated by one guard motor 22, and the structure related to the driving of the both valve mechanisms 14 and 16 can be reduced in cost. effective.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing an internal structure of a washing machine.

FIG. 2 is a diagram showing a relationship between a water supply valve mechanism, a drain valve mechanism, and a geared motor in a state where a drive member is at a forward position.

FIG. 3 is a diagram showing a state of a circuit of the water supply / drainage device in the state of FIG. 2.

FIG. 4 is a view similar to FIG. 2 showing the drive member in an intermediate position.

5 is a diagram showing a state of the circuit in the state of FIG.

FIG. 6 is a view similar to FIG. 2, showing a state in which the drive member is in the retracted position.

FIG. 7 is a diagram showing a state of the circuit in the state of FIG.

FIG. 8 is a diagram schematically showing an internal mechanism of a geared motor.

FIG. 9 is a diagram showing an example of a laundry program.

[Explanation of symbols]

 8 Water supply / drainage device 11 Water supply pipe 14 Water supply valve mechanism 15 Drain pipe 16 Drain valve mechanism 17 Drive device 20, 21 Movable part 23 Drive member

Claims (1)

[Claims] 1. A water supply pipe for supplying water to a washing tub is provided with a water supply valve mechanism having a movable part for opening / closing operation, and a water distribution pipe for draining water from the washing tub is opened / closed for operation. In a water supply / drainage device for a washing machine in which a drain valve mechanism having a movable part is provided and each of the movable parts is operated by a drive device, the drive device includes a reciprocally movable drive member at a forward position and a backward position. A geared motor is arranged to be stopped at three positions, a position and an intermediate position thereof, and the movable part of the water supply valve mechanism and the movable part of the drainage valve mechanism are:
In one of the above three positions, both valve mechanisms are closed, in the other one only the water supply valve mechanism is open, and in the other one only the drain valve mechanism is open. A washing machine characterized in that the washing machine is positioned so as to be driven by the driving member along the reciprocating locus thereof.