JPH11239691A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure switching when a clutch is switched to a spin-drying clutch mode from a washing clutch mode. SOLUTION: A control circuit 56 switches a clutch to a spin-drying clutch mode from a washing clutch mode by operating a lever by controlling carrying/ cutoff of an electric current to a geared motor 47. It is judged as a clutch unstable situation when in a washing side clutch mode by judging whether or not the clutch is put in the washing clutch mode on the basis of a signal from a reed switch 44 at this switching time. The lever is reoperated by controlling the geared motor 47 when the clutch unstable situation is judged. Therefore, switching of the clutch is secured by reperforming switching operation to the spin-drying clutch mode from the washing clutch mode of the clutch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine having a clutch for connecting and disconnecting a rotary tub and a stirring body.

[0002]

SUMMARY OF THE INVENTION In the present applicant,
We have filed a Japanese Patent Application No. 9-194148 as a washing machine. FIGS. 23 and 2 show the structure of the mechanism in this washing machine.
This washing machine has a characteristic configuration in a clutch portion. That is, a hollow tank shaft 101 is provided in the rotary tank 101 (only the bottom is shown in the figure).
a, and a stirring shaft 102a connected to a stirring body 102 (only a boss portion thereof is shown in the figure) is rotatably inserted into the inside of the tank shaft 101a. A motor 103 is provided at the lower end of the stirring shaft 102a.
Are connected, and when the rotor 103a rotates, the agitating body also rotates integrally with the stirring shaft 102a.

[0003] A clutch lever 105 of a clutch 104 is connected to the tank shaft 101a.
This shows a dehydrating clutch mode, in which the clutch lever 105 is rotated in the direction opposite to the arrow R, and the lower convex portion 105a of the clutch lever 105 engages with the engaging convex portion 103b of the rotor 103a. With this engagement, the tank shaft 101a and the rotor 103a are connected via the clutch lever 105. That is, the rotating tank 101 and the stirring body 102 are connected. Therefore, when the rotor 103a rotates in this state, the rotational force of the rotor 103a is transmitted from the clutch lever 105 to the rotary tank 101 through the tank shaft 101a, and the rotary tank 101 and the stirring body 102 rotate integrally. The dehydration operation is performed by this rotation.

On the other hand, a control lever 106 is provided beside the clutch lever 105. When the control lever 106 enters the rotation locus of the clutch lever 105, the clutch lever 105 comes into contact with the control lever 106 and an arrow R
Rotate in the direction. Then, as shown in FIG. 24, the upper convex portion 105b of the clutch lever 105 engages with the inside of the clutch engaging hole 107a of the base 107.
3a and the clutch lever 105 are shut off, that is, the connection between the stirring body 102 and the rotary tub 101 is released, and the rotary tub 101 is fixed. As a result, a washing clutch mode is obtained. In this state, the rotor 10 of the motor 103 is
When 3a rotates, the stirring body 102 rotates alone. By this rotation, a washing operation (including a detergent washing operation and a rinsing operation) is performed.

The lower convex portion 1 of the clutch lever 105
The first engaging means 108 is constituted by the engaging projections 105b of the clutch lever 105 and the clutch engaging hole 10 of the base 107.
The second engaging means 109 is constituted by 7a.

The clutch switching operation (rotating tank 1)
The clutch switching determination means 110 is provided for determining whether or not the rotation tank 101 and the stirring body 102 have been disconnected from the connection state of the rotating body 101 and the stirring body 102 (FIG. 25).
reference). It comprises a reed switch 110a provided on the base 107 and a magnet 110b provided on the clutch lever 105.

The clutch switching determining means 110 turns on the reed switch 110a when the magnet 110b of the clutch lever 105 approaches the reed switch 110a by a predetermined distance or more, and the clutch 104
Is switched to the washing clutch mode.

When switching from the washing clutch mode to the dehydrating clutch mode in FIG. 24, the control lever 106 is rotated to push the guide portion 106a against the operated portion 105c of the clutch lever 105. In this case, the operated portion 105c is rotated downward by the pressing, and the operation is switched to the dehydrating clutch mode as shown in FIG.

However, at the end of the washing operation (when the clutch 104 is in the state shown in FIG. 24), when the amount of laundry is abnormally large or the amount of water is large, the upper convex portion 105b of the clutch lever 105 is simply turned on. Base 10
7 (the second engaging means 109 is firmly engaged). In this state, the clutch 104 is switched to the dewatering clutch mode. When the control lever 106 is rotated, it is difficult to disengage the control lever 106, and there is a concern that the clutch cannot be normally switched to the dehydrating clutch mode.

During the washing operation, the motor 10
3 is rotated forward and reverse, and in this case, the clutch 1
04 is in the state shown in FIG. Then, motor 1
The stirrer 102 is rotated forward and backward by the forward and reverse rotation of 03, and the water and the laundry in the rotating tub 101 are stirred in the forward and reverse directions.
The rotating tank 101 receives a force in the forward and reverse directions by this stirring operation. This force is transmitted to the clutch lever 105 via the tank shaft 101a, whereby the clutch lever 105
The upper convex portion 105b may easily come off the clutch engaging hole 107a of the base 107.

A first object of the present invention is to ensure that the clutch can be switched from the washing clutch mode to the dehydrating clutch mode,
A second object of the present invention is to determine whether or not the clutch has become unstable during the washing operation, and to control the clutch to be in a stable state when the clutch has become unstable. There.

[0012]

Means for Solving the Problems To achieve the first object, an invention according to claim 1 comprises a rotary tub, a stirrer disposed in the rotary tub and rotated by a motor, and An engaging means, a second engaging means, and a lever are provided, and the first engaging means is engaged to perform an engaging operation based on operating the lever when performing a dehydrating operation, so that the rotating tank and the stirrer are connected. The second engaging means is engaged to release the connection between the rotary tub and the stirrer and to fix the rotary tub based on the dehydrating clutch mode and the operation of the lever when the washing operation is performed. A clutch for switching between a washing clutch mode, a clutch switching determining means for determining whether or not the clutch is the washing clutch mode, and operating the lever to switch the clutch from the washing clutch mode to the dehydrating clutch mode. A clutch state determining means for determining whether the clutch is in a washing clutch mode by the clutch switching determining means, and determining that the clutch is in an unstable state when the clutch is in a washing clutch mode; A dehydration switching retry control means for operating the lever again when the clutch unstable state is determined by the means.

According to the first aspect of the present invention, when the lever is operated to switch the clutch from the washing clutch mode to the dehydrating clutch mode, the clutch switching determining means determines whether the clutch is in the washing clutch mode. Since the clutch state determining means for determining and determining the clutch instability state in the washing-side clutch mode is provided, it is possible to determine whether the clutch state is unstable. When the clutch unstable state is determined by the clutch state determining means, the lever is operated again by the dehydration switching retry control means. Therefore, the switching operation of the clutch from the washing clutch mode to the dehydrating clutch mode is performed again. Thus, the switching of the clutch can be reliably performed.

According to a second aspect of the present invention, the dehydration switching retry control means intermittently drives the motor when the clutch state determination means determines that the clutch is unstable.
The feature is that the lever is operated again. The situation in which the clutch situation determining means determines the clutch unstable state is often due to the fact that the engagement of the second engaging means of the clutch is in a strong state. According to the second aspect of the present invention, the motor is driven intermittently when the clutch condition determining means determines that the clutch is unstable, so that the external force to each part accompanying the intermittent operation is also transmitted to the clutch. Therefore, it can be expected that the engagement state of the second engagement means is loosened, so that when the lever is operated again thereafter, the second engagement means is released.
Is easily disengaged, and the switching of the clutch becomes more reliable.

According to a third aspect of the present invention, there is provided a laundry amount detecting means for detecting an amount of laundry, and the dehydration switching retry control means changes the intermittent drive mode of the motor in accordance with the detection result of the laundry amount detecting means. It has a characteristic in such a place. When the engagement of the second engagement means of the clutch is in a firm state, it is considered that the degree of the firmness often correlates with the amount of laundry or the amount of laundry. According to the third aspect of the present invention, the dehydration switching retry control means changes the intermittent drive mode of the motor according to the detection result of the laundry amount detection means. While driving, it is possible to ensure the clutch switching.

According to a fourth aspect of the present invention, the dehydration switching retry control means supplies water to a preset water level in the rotary tank when the clutch state determining means determines that the clutch is unstable, and intermittently controls the motor. The feature is that the lever is operated again after driving. When loosening the strong engagement state of the second engagement means of the clutch by intermittent driving of the motor, the presence state of the laundry in the rotating tub (the floating state, the sinking state, or the bottom part). It is also conceivable that the engagement state does not become loose depending on such factors as the uneven distribution. According to the fourth aspect of the present invention, since the motor is intermittently driven after the water is supplied to the preset water level in the rotary tub, the presence of the laundry in the rotary tub can be changed. Thus, it is possible to ensure the clutch switching.

According to a fifth aspect of the present invention, the dehydration changeover retry control means can execute a series of controls such as the determination of the washing clutch mode by the clutch changeover determination means, the intermittent drive of the motor, and the re-operation of the lever a plurality of times. When the series of controls is performed for the second time or later, the motor driving time in intermittent driving of the motor is extended.

In this configuration, the dehydration switching retry control means can execute a series of controls such as the determination of the washing clutch mode by the clutch switching determination means, the intermittent drive of the motor, and the re-operation of the lever a plurality of times. Therefore, the switching of the clutch becomes more reliable. And even if the clutch switching is uncertain in the first series of control,
After the first time, since the motor driving time in the intermittent driving of the motor is lengthened, the clutch switching is further ensured.

In order to achieve the second object, the invention according to claim 6 is directed to a rotary tank, a stirring body disposed in the rotary tank and rotated by a motor, a first engaging means and a second engaging means. A dehydrating clutch mode comprising: an engaging means and a lever, wherein the first engaging means is engaged based on actuation of the lever when the dehydrating operation is performed, whereby the rotary tank and the stirring body are connected. A washing clutch mode for releasing the connection between the rotary tub and the agitator and fixing the rotary tub by engaging the second engagement means based on operating the lever when performing the washing operation. A clutch to be switched, clutch switching determining means for determining whether or not the clutch is in a washing clutch mode, an alarm, and a determination that the clutch is not in a washing clutch mode by the clutch switching determining means during the washing operation. It is determined whether it is determined number or more,
A clutch condition determining means for determining that the clutch is in an unstable condition when it is determined that the clutch is not in the washing clutch mode for a predetermined number of times or more; The present invention is characterized in that it comprises a clutch unstable state notification control means for performing a notification operation.

In the sixth aspect of the present invention, during the washing operation, the clutch switching determining means determines whether or not the clutch is not in the washing clutch mode for a predetermined number of times or more. When it is determined that the clutch is in an unstable state, the clutch state determining means for determining that the clutch is in an unstable state is provided, so that the clutch unstable state during the washing operation can be reliably detected. That is, during the washing operation, an external force acts on the clutch due to the fact that the motor is driven forward and backward and the laundry and water in the rotating tub are agitated accordingly. As a result, the clutch may temporarily be in the non-washing clutch mode (the clutch switching determination unit may determine that the clutch is not in the cleaning clutch mode). However, after that, it may return to the washing clutch state. Thus, in the above configuration, since the clutch is determined to be in an unstable state by not being in the washing clutch mode a predetermined number of times or more, the determination accuracy is high,
The clutch unstable state during the washing operation can be reliably detected.

[0021] When the clutch unstable state is judged by the clutch unstable state judging means, the clutch unstable state informa- tion control means causes the alarm device to perform an informing operation. Response is possible.

According to a seventh aspect of the present invention, there is provided a rotary tank, a stirrer disposed in the rotary tank and rotated by a motor, first engagement means, second engagement means, and a lever, The first is based on operating the lever when performing the dehydration operation.
A dehydrating clutch mode in which the rotary tub and the stirrer are connected to each other by engaging the engaging means, and the second engaging means based on operating the lever when performing a washing operation. A clutch for switching between a washing clutch mode for releasing the connection between the rotary tub and the stirrer and engaging the rotary tub by engaging the clutch, and a clutch switching for determining whether the clutch is the washing clutch mode. A determining unit that determines whether the clutch is not in the washing clutch mode by a predetermined number of times or more during the washing operation by the clutch switching determining unit, and when it is determined that the clutch is not in the washing clutch mode by the predetermined number of times or more. Clutch status determining means for determining that the clutch is in an unstable state, and an unstable clutch state is determined by the clutch status determining means. In this case, an unstable situation coping operation is performed in which the stirring operation by the stirrer is stopped, the clutch is switched to the dehydrating clutch mode, the clutch is switched to the washing clutch mode, and then the stirring operation is restarted. A washing machine comprising: an unstable situation handling means.

According to the present invention, when the clutch state determining means determines that the clutch is unstable, the unstable state handling means stops the stirring operation by the agitating body and switches the clutch to a dehydrating clutch mode. After performing the switching operation, the clutch is switched to the washing clutch mode, and then the agitation operation is resumed. Therefore, the unstable state coping operation is performed. Therefore, even if the clutch state is unstable, the clutch state is changed to the washing clutch mode. The operation can be reliably restored, and the washing operation can be favorably continued.

According to the invention of claim 8, the washing operation starts the stirring operation by the stirrer when the water supply water level reaches a predetermined water level lower than the set water level, and stops the water supply after reaching the set water level to perform the stirring operation. The unstable situation handling means stops the stirring operation when the clutch unstable situation determination timing by the clutch situation determining means is during the water supply operation during the washing operation. It is characterized in that the water supply operation is continued and the unstable situation coping operation is executed.

If the clutch unstable state determination timing by the clutch state determining means is during the water supply operation during the washing operation, both the stirring operation and the water supply operation may be stopped. Stopping the agitation operation is effective because it eliminates one of the causes of clutch instability, but the water supply operation is effective because the stop is not so related to the removal of the cause of clutch instability. Conversely, when the water supply operation is stopped, it takes a long time to supply water to the set water level.

According to the eighth aspect of the present invention, when the clutch unstable state determining timing by the clutch state determining means is during the water supply operation during the washing operation,
Since the agitation operation is stopped and the water supply operation is continued to perform the unstable situation handling operation, it is possible to eliminate one of the causes of clutch instability and prevent the water supply time from becoming long.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention (corresponding to the first aspect of the present invention) will be described below with reference to FIGS. First, FIG. 2 shows the configuration of the entire washing machine, in which a plurality of sets of outer tubs 2 are provided in an outer box 1 (only one set is shown).
Elastically supported via the elastic suspension mechanism 3 described above. Inside the outer tub 2, a rotary tub 4 serving as a washing tub and a dewatering tub is provided, and further, inside the rotary tub 4, a stirring member 5 is provided.

The rotary tank 4 has a tank body 4a having a tapered cylindrical shape that gradually expands upward, an inner cylinder 4b provided inside the tank body 4a so as to form a water pumping space, and a tank body 4a. And a balance ring 4c attached to the upper end. When the rotary tub 4 is rotated, the internal water is pumped by a rotary centrifugal force and discharged to the outer tub 2 from a dehydration hole (not shown) in the upper portion of the tank main body 4a.

A tank shaft through hole 6 is formed at the bottom of the outer tank 2 and a drain port 7 is formed. The drain port 7 is connected to a drain passage 9 having a drain valve 8. ing. The drain valve 8 is opened and closed by a geared motor 47 (see FIG. 1) described later. Further, an auxiliary drain port 7a is formed at the bottom of the outer tank 2, and the auxiliary drain port 7a is connected to the drain passage 9 by bypassing the drain valve 8 via a connecting hose (not shown). The water discharged from the upper portion into the outer tub 2 by the rotation of 4 is discharged.

As shown in FIG. 3, a mechanism housing 10 is attached to the outer bottom of the outer tub 2. The mechanism housing 10 includes an upper frame 10 a and a lower frame 1.
The upper frame portion 10a has an upwardly directed cylindrical portion 11 formed at the center thereof, and the lower frame portion 10b has a downwardly directed cylindrical portion 12 formed at the center thereof. Bearings 13 and 14 composed of, for example, ball bearings are disposed in the two cylindrical portions 11 and 12, and a hollow tank shaft 15 is inserted into and supported by these bearings 13 and 14. A seal 16 is fitted to the upper part of the bearing 13 in the cylindrical part 11.

The upper part of the tank shaft 15 has a flange portion 17a.
Is mounted so as to rotate integrally with the tank shaft 15. Further, a stirring shaft 18 is provided inside the tank shaft 15.
Are rotatably inserted through bearings 18 a, 18 a made of, for example, metal, and the upper end thereof is projected from the support cylinder 17, and the lower end is projected from the lower end of the tank shaft 15. Thus, the rotary tub 4 is attached to the flange portion 17a of the support cylinder 17 so as to rotate integrally therewith.
The stirring body 5 is attached to the upper end of the stirring shaft 18 so as to rotate integrally.

A drain cover 19 is attached to the inner bottom of the outer tub 2 as shown in FIG.
A drain passage 20 extending from the bottom of the rotary tank 4 to the drain valve 8 at the drain port 7 is formed. Therefore, by supplying water into the rotary tub 4 with the drain valve 8 closed, water is stored in the rotary tub 4 from the drain passage 20, and when the drain valve 8 is opened, the water in the rotary tub 4 is drained. Water can be drained through the passage 20.

The mechanism frame 1 at the outer bottom of the outer tub 2
The motor 21 is a brushless motor type
Is provided. That is, as shown in FIG.
Installed. The stator 22 includes a laminated iron core 23,
And a winding 24.

On the other hand, a rotor 25 constituting the motor 21 with the stator 22 is attached to the lower end of the stirring shaft 18 so as to rotate integrally therewith. This rotor 25
Has a rotor housing 26, a rotor yoke 27, and a rotor magnet 28.

A clutch 29 is provided below the mechanism housing 10. As shown in FIGS. 7 to 9,
In this clutch 29, the holder 30 is mounted such that the shaft insertion hole 30 a is fitted to the outer periphery 15 a of the lower end of the tank shaft 15 and rotates integrally with the tank shaft 15. The holder 30 includes a switching member 31 having a rectangular frame shape.
It is attached so as to be vertically rotatable by a shaft 32.

Further, the switching member 31 includes a holder 3
0, a toggle spring 33 formed of a coil spring is provided so that the switching member 31 is held at one (upper) rotational position and the other (lower) rotational position in the axial direction. Has become. Further, at the tip end of the switching member 31, convex portions 34, 35 serving as engaging portions are provided at upper and lower portions, respectively.
Are formed integrally with each other, and the operated portion 36 is also integrally formed on the front end surface. The operated portion 36 has an inclined surface 36a which is an upward guide receiving surface and also has an inclined surface 36b which is a downward guide receiving surface. These inclined surfaces 36a and 36b are formed as curved surfaces as shown in FIG. 9, and the respective surfaces 36a and 36b are coated with a fluororesin which is a low friction resin.

Further, a hole 37 is formed in the lower frame portion 10b of the mechanical portion frame 10 which is a stationary portion so as to correspond to the upper convex portion 34 of the switching member 31. A plurality of protrusions 38 are formed on the upper surface of the jing 26 so as to correspond to the rotation locus of the lower protrusion 35. The first engaging means 39 is formed by the projection 35 of the switching member 31 and the projection 38 of the rotor housing 33.
Are formed, and the convex portion 34 of the switching member 31 and the lower frame portion 1
The second engaging means 40 is constituted by the hole 37 of Ob.

On the other hand, a magnet holder 41 is formed on the switching member 31 as shown in FIGS. 7 and 8, and a magnet 42 is attached to the magnet holder 41. On the other hand, around the cylindrical portion 12 of the lower frame portion 10b, FIG.
A flat cover 43 is attached as shown in FIG.
A reed switch 44 is attached to the back surface of the cover 43, and the reed switch 44 and the magnet 42 constitute clutch switching determination means 45 (see FIG. 5).

However, during the washing operation, FIGS.
As shown in the figure, the engagement between the upper convex portion 34 and the hole 37 (second
The tank shaft 15 is fixed so as not to rotate, and the rotor 25 and the stirring shaft 18 are kept connected to each other (they are originally integrally rotated). This state is the state of the washing clutch. At this time, the magnet 42 is close to the reed switch 44 to turn on the reed switch 44. This ON signal is a signal indicating that the clutch switching is switched to the washing clutch mode, and is a control circuit to be described later. 56 (see FIG. 1).

The on-operation range of the reed switch 44 is set to a relatively narrow range in order to reliably detect that the clutch state is in the washing clutch state. In this connection, when the reed switch 44 is off, the clutch 29 may be in the dehydrating clutch mode or may be in the uncertain washing clutch mode.

On the other hand, during the dehydrating operation, as shown in FIGS. 4 and 5, the engagement between the lower projections 35 and the projections 38 (engagement of the first engagement means 39) causes the dehydrating clutch mode. In other words, the tank shaft 15 is connected to the rotor 25, and the rotor 25 is connected to both the stirring shaft 18 and the tank shaft 15. This state is a dehydrating clutch mode state.

A control lever 46 as a lever shown in FIG.
The mechanism unit frame 10 is rotatably provided by an intermediate support shaft 46a, which is driven in the direction of the arrow A based on the operation of the drive source of the control lever 46 and the operation of the geared motor 47 as the drain valve driving means shown in FIG. It is configured to be turned in the opposite arrow B direction. As shown in FIG. 14, the control lever 46 is composed of a main driving part 48 and a driven part 49 attached so as to be able to rotate slightly with respect to the main driving part 48. These are integrally formed by a spring 50. It is designed to rotate. The driven portion 49 is formed with an inclined piece portion 49a serving as an operating portion, and the inclined piece 5 serving as an operating portion.
1 is rotatably (fallable) pivotally supported. Note that the inclined piece 51 does not rotate in the direction of the arrow Sa from the state shown in FIG. 14, but can slightly rotate in the direction of the arrow Sb against the spring force of the spring 51a. ing.

When an excessive force in the direction of arrow B acts relatively on the inclined piece 49a of the driven part 49, the driven part 49
Rotates in the direction of arrow B relative to the driving portion 48 against the spring force of the spring 50.

The arm 48a of the control lever 46 is connected to the connecting tool 52 shown in FIG. 11. When the geared motor 47 is energized, the motor 47 winds up the wire 47a and connects the connecting tool 52. Pull in the direction of arrow K.
This movement in the direction K causes the control lever 46 to rotate in the direction of arrow A. When the motor 47 is turned off after the rotation, the control lever 4 is controlled by the lever spring 53 (see FIG. 11).
6 returns in the direction of arrow B, and the connecting tool 52 also returns in the direction opposite to arrow K. When the geared motor 47 is energized as described above and the connecting tool 52 is moved in the direction of the arrow K, the drain valve 8 is opened (always closed). The control lever 46 is provided with the lever spring 5 described above.
3 is always urged in the direction of arrow B.

Normally (geared motor 47 is disconnected), the control lever 46 is controlled by the lever spring 53 as shown in FIG.
In the initial position shown in FIGS. 11 and 13, when the upper surface 51 b of the inclined piece 51 and the inclined surface 36 b of the switching member 31 come into contact with each other, the projection 3
4 is configured so as to have a positional relationship substantially vertically facing the hole 37.

When the control lever 46 is turned in the direction of arrow A from the state shown in FIG. 11 (the state of the washing clutch), as shown in FIG. 8, the lower surface 49a 'of the inclined piece portion 49a is lowered. The inclined surface 3 of the operated portion 36 of the switching member 31
6a, the operated portion 36 is pressed downward, and the spring force of the toggle spring 33 finally causes the state of the dehydrating clutch shown in FIGS. 4 and 5 (the lower portion of the switching member 31). Is brought into engagement with the projections 38 of the rotor 25 to connect the rotor 25 to both the stirring shaft 18 and the tank shaft 15 (a state during the dehydration operation).

When the dehydrating operation is completed, the geared motor 47 is turned off from the state shown in FIGS. 4, 5, and 13, and the control lever 46 is rotated in the direction of arrow B by the lever spring 53 to return to the initial position. It is. And rotor 2
5 (rotation in the direction of arrow C in FIGS. 8 and 12)
Is done. Then, the inclined surface 36b of the operated portion 36 of the switching member 31 slides on the upper surface 51a of the inclined piece 51, and the operated portion 36 is pressed upward.
Finally, the spring state of the washing clutch shown in FIG. 3 and FIG.
4 into the hole 37 of the mechanism frame 10 to
5 is fixed, and the rotor 25 and the stirring shaft 18 are connected to each other in a washing operation state). When the control lever 46 is at the position shown in FIGS. 4, 5 and 13 (during dehydration operation), the drain valve 8 is open.

Here, turning off the geared motor 47 to rotate the control lever 46 in the direction of arrow B and rotating the rotor 25 at low speed in the direction of arrow C are referred to as switching operations to the clutch mode for washing. . Switching the control lever 46 in the direction of arrow A by energizing the geared motor 47 is referred to as a switching operation to a dehydrating clutch mode.

In FIG. 1 showing the electrical configuration, a DC power supply circuit 54 for converting an AC power supply Vac to a DC voltage is connected to an inverter main circuit 55 as a motor drive circuit. ~ 55f
Are connected in a three-phase bridge. The windings 24 of each phase of the motor 21 are connected to the inverter main circuit 55. The switching elements 55a to 55f of the inverter main circuit 55 are controlled by a control circuit 56 via an inverter control circuit 57, that is, the motor 21 is controlled by the control circuit 56. The control circuit 56 is mainly composed of a microcomputer, and includes a switch input unit 58 including various switches provided on an operation panel (not shown).
And an opening / closing detection signal from a lid switch 59 for detecting opening / closing of the washing machine lid 1b (see FIG. 2), and a water level sensor 60 for detecting the water level in the rotary tub 4. A water level detection signal is provided, and further, an on signal and an off signal from the reed switch 44 are provided.

The control circuit 56 drives and controls a geared motor 47 via a drive circuit 61, a water supply valve 62 for supplying water into the rotary tub 4 via a drive circuit 63, and a buzzer 64 serving as a notification means. ing. The control operation in the control circuit 56 is performed according to a control program stored in a storage means such as a ROM, and the control circuit 56 executes each operation of washing, rinsing, and dehydration. Further, the control circuit 56
Functions as clutch condition determination means and dehydration switching retry control means. The motor 21 has a position detecting element 21a for detecting the position of the rotor 25,
21b, and the position detecting elements 21a, 2b
The position detection signal 1b is also used for rotation speed detection, and also serves as rotation speed detection means.

Now, the operation of the above configuration will be described together with the functions of the control circuit 56 as the unstable situation detecting means and the unstable situation handling means. The control circuit 56 executes a main routine of washing control (not shown) during a washing operation such as detergent washing or rinsing. In this main routine, first, an operation of detecting a laundry amount (corresponding to a laundry amount detecting means). Operation). This is because, in the state of the washing clutch (see FIG. 3), when the laundry is stored in the rotating tub 4 and water is not stored, a constant electric power is applied to the motor 27 to rotate the stirring body 5, Depending on the rotation speed (rise degree or inertia rotation fall degree after power failure), the laundry amount can be set to three levels "large",
It is detected by either "medium" or "small". This detection data is used for water level setting.

Thereafter, water is supplied into the rotary tank 4. In this case, when the set water level is reached, this water supply is stopped, and the forward / reverse rotation of the motor 21 is started. And
When the set washing time elapses, the forward / reverse rotation ends, and the washing operation ends. The stirrer 5 is rotated forward and reverse by the forward and reverse rotation of the motor 21 to wash the laundry.

When the above-described detergent washing operation is completed, the control circuit 56 shifts to the intermediate dehydration operation, and when the rinse operation is ended, shifts to the final dehydration operation. Prior to such a transition of the dehydration operation, a dehydration clutch mode switching command is generated in the internal program, and in this case, the control shown in FIG. 15 (control as unstable state detecting means and unstable state handling means) is executed. I do.

First, at step P1, the geared motor 47
And the control lever 46 is turned in the direction of arrow A to switch to the dehydrating clutch mode. This allows
The inclined piece 49a of the driven portion 49 of the control lever 46 comes into contact with the inclined surface 36a of the switching member 31, and a downward force acts on the switching member 31. At this time, if the engagement of the second engagement means 40 (the convex portion 34 and the hole 37) is not in a strong state, the switching member 31 releases the engagement of the second engagement means 40 and turns downward. And the projection 35 of the switching member 31 is moved.
Engages with one of the plurality of projections 38 (first engagement means 39
Are engaged), and the clutch 29 is in a dehydrating clutch mode. Also, the second engaging means 40 (the convex portion 34 and the hole 37)
Is strong, the second engagement means 40 is not disengaged even if the switching member 31 receives a downward force.
In this case, since the switching member 31 does not move downward when the inclined piece portion 49a of the driven portion 49 comes into contact with the inclined surface 36a of the switching member 31, the control lever 46 only controls the main driving portion 48 thereafter. It turns against the spring force of the spring 50.

In the next step P2, the reed switch 4
It is determined whether or not 4 is ON (whether or not it is in the washing clutch mode). If it is not ON, it is determined that the operation has been switched to the dehydrating clutch mode and the operation shifts to the dehydrating operation. If it is ON, that is, if it is the washing clutch mode, it is determined that the clutch is in an unstable state, and the routine goes to Step P3.

In step P3, the geared motor 47
Is turned off, the control lever 46 is returned in the direction of arrow B and rotated, and in step P4, the geared motor 47 is energized again to rotate the control lever 46 in the direction of arrow A again, and The operation is switched to the clutch mode. in this case,
In many cases, the engagement of the second engagement means 40 is loosened by the first switching operation, and therefore, the second switching operation almost switches to the dehydrating clutch mode.

Then, in the next step P5, it is determined whether or not the reed switch 44 is turned on. If not, the flow shifts to the next spin-drying operation. If it is on, the buzzer 64 is caused to perform a notification operation in step P6,
, The operation is stopped (the execution of the operation program is stopped) by turning off the motor 21 and the geared motor 47.

According to the present embodiment, the clutch 2
When the control lever 46 is operated to switch the clutch 9 from the washing clutch mode to the dehydrating clutch mode, it is determined whether or not the clutch is in the washing clutch mode by the reed switch 44 of the clutch switching determining means 45. Since the clutch unstable state is determined when the clutch is in the clutch mode, it can be determined when the clutch unstable state occurs. When the clutch unstable state is determined, the control lever 46 is operated again.
The switching operation of the clutch from the washing clutch mode to the dehydrating clutch mode is performed again, and the switching of the clutch 29 is ensured.

FIG. 16 shows a second embodiment of the present invention.
Corresponding to the invention of the present invention), and in this embodiment,
The following points are different from the first embodiment. That is, when it is determined that the clutch is unstable (“YE” in step Q2).
S "), in step Q3, the geared motor 47 is turned off to return the control lever 46, and thereafter, the process proceeds to step Q4. In step Q4, the motor 21 repeats a pattern such as forward rotation (for example, 0.4 seconds), pause (0.5 seconds), reverse rotation (0.4 seconds), and pause (0.5 seconds). , Ie, after intermittent driving, and in step Q5, the control lever 46 is energized again to operate again.

In the second embodiment, the motor 21 is driven intermittently when it is determined that the clutch is in an unstable state. Therefore, the external force applied to each part due to the intermittent operation is also transmitted to the clutch 29. It can be expected that the engagement state of the second engagement means 40 becomes loose. For example, when the motor 21 is intermittently driven, the vibration itself may be transmitted to the second engagement means 40, and the water and the laundry in the rotating tub 4 may move in the forward direction by the driving of the motor 21. Since the fluid flows in the opposite direction, the rotary tank 4 receives a force in the co-rotating direction (forward / reverse direction). This force is applied from the tank shaft 15 to the clutch lever 35.
It can be expected that the engagement state of the second engagement means 40 is loosened. Therefore, when the control lever 46 is operated again thereafter, the engagement of the second engagement means 40 is easily disengaged, and the clutch switching becomes more reliable.
The above-described intermittent driving of the motor 21 may be a repetitive pattern of one-way rotation and pause without switching the rotation direction between forward and reverse. Further, the rotation time and the pause time may be appropriately changed.

FIG. 17 shows a third embodiment of the present invention.
This embodiment is characterized in that the intermittent drive mode of the motor is changed according to the laundry amount detection result. That is, as described above, the laundry amount is detected as one of “large”, “medium”, and “small”, but in step R4, the detection result of the laundry amount is “large”. Is determined ("YES" in step R4), the process proceeds to step R5, in which the motor 21 is rotated in the forward direction for 0.6 seconds.
Driving is performed by repeating a mode such as a pause for 6 seconds, a reverse rotation for 0.6 seconds, and a pause for 0.6 seconds. If it is determined that the laundry amount is “medium” (“YES” in step R6), the process proceeds to step R7, in which the motor 21 is rotated in the forward direction for 0.4 seconds, paused for 0.5 seconds, The drive is performed by repeating a mode such as a reverse rotation for 0.4 seconds and a pause for 0.5 seconds. Furthermore, if it is determined that the laundry amount is "small"("NO" in step R6), the process proceeds to step R8, in which the motor 21 is rotated in the forward direction for 0.3 second and paused for 0.5 second. , 0.3 seconds reverse rotation,
Drive is performed by repeating a mode such as a 0.5 second pause.

Here, the second engagement means 4 of the clutch 29
When the engagement of 0 is in a firm state, it is considered that the degree of the firmness often correlates with the amount of laundry. That is, during the washing operation, the motor 21
Are rotated in the forward and reverse directions, it is difficult for the second engagement means 40 to be in a strong engagement state (a state in which the engagement is firm and difficult to remove), but when the washing operation is completed (when the motor 21 stops). In many cases, the water and the laundry in the rotating tub 4 are stopped while flowing in a certain direction by inertia, and the engagement means 40 is often in a state of being firmly engaged in that direction. This strength is greater when the amount of laundry is large than when the amount is small, and it is more prone.

In the case where the strong engagement state of the engagement means 40 is loosened by intermittently driving the motor 21, it is better to change to the drive mode of the motor 21 depending on the degree of the strength. It is considered that the engagement of the engagement means 40 can be satisfactorily loosened while the 21 is operated without excess or shortage.

However, as in the third embodiment, the intermittent drive mode of the motor 21 is changed to a longer motor drive time as the detection result of the laundry amount detecting means is "larger". Therefore, it is possible to reliably switch the clutch while driving the motor 21 without excess or shortage.

FIG. 18 shows a fourth embodiment of the present invention.
Corresponding to the invention of the present invention), and in this embodiment,
It has the following features. That is, when the clutch unstable state is determined (“YES” in step S2), the geared motor 47 is turned off in step S3 and the control lever 46 is turned off.
Is returned to step S4, water is supplied to the rotary tank 4 to a preset water level, and thereafter, step S5
And the motor 21 is driven intermittently. Thereafter, the process proceeds to step S6, where the geared motor 47 is energized to operate the control 46 lever again.

The control of this embodiment takes the following points into consideration. When the strong engagement state of the second engagement means 40 of the clutch 29 is loosened by intermittently driving the motor 21, the presence state of the laundry in the rotating tub 4 (such as a floating state or a sinking state). It is possible that the engagement state does not become loose depending on the situation of being engaged or being unevenly distributed at the bottom. However, according to the fourth embodiment, the motor 21 is intermittently driven after water is supplied to the rotary tub 4 to a preset water level. It can be changed to ensure the clutch switching.

FIG. 19 shows a fifth embodiment of the present invention.
In the fifth embodiment, a series of controls such as determination of a clutch mode for washing, intermittent driving of a motor, and re-operation of a lever are executed once or twice. When the control is performed for the second time, the motor 21
The feature is that the motor driving time in intermittent driving is extended.

That is, when it is determined in step T2 that the clutch is in the washing clutch mode, the control lever 46 is turned off and returned in step T3, and then the motor 21 is turned on for 0.3 seconds in step T4. Direction rotation, 0.5 second pause,
The drive is performed by repeating a mode such as a reverse rotation for 0.3 seconds and a pause for 0.5 seconds. Then, the process proceeds to step T5, in which the control lever 46 is energized again. When it is determined in step T6 that the reed switch 44 is on (in the state of the clutch for washing), step T7 (step In step T8, the motor 21 and the motor 21 are intermittently driven in a mode different from that in step T4.
That is, the motor 21 is rotated in the forward direction for 0.6 seconds.
Driving is performed by repeating a mode such as a pause for 6 seconds, a reverse rotation for 0.6 seconds, and a pause for 0.6 seconds.

In this embodiment, a series of controls such as the determination of the clutch type for washing, the intermittent driving of the motor, and the re-operation of the lever can be executed a plurality of times, so that the clutch switching is further ensured. And even if the clutch switching is uncertain in the first series of control,
At the first time, since the motor drive time in the intermittent drive of the motor 21 is lengthened, the clutch switching is further ensured. In the above-described embodiment, the series of controls following the determination of the clutch state for washing is performed twice. However, this may be performed two or more times. What is necessary is just to lengthen the motor drive time in dynamic drive.

FIG. 20 shows a sixth embodiment of the present invention.
This embodiment will be described.
FIG. 20 shows the control contents of the clutch state determination means and the control contents of the clutch unstable state notification control means during the washing operation. That is, when the washing operation is started, water supply is started (step U1), and when the set water level is reached (determined in step U2), the water supply is stopped (step U1).
3) The motor 21 is rotated forward and reverse to perform the stirring operation (step U4).

In the next step U5, it is determined whether or not this washing operation has been completed (it will be finished when the set washing time has expired). If not, the flow proceeds to step U6.
It is determined whether or not the reed switch 44 is on (whether or not the clutch 29 is in the washing clutch mode).
If the reed switch 44 is on, the process returns to step U5.

If the reed switch 44 is not turned on (not in the clutch mode for washing), the parameter N (the number of times that it is determined that the clutch is not in the washing mode is a parameter, and the initial value is "0"). Increment. Then, the process shifts to step U8 to determine whether or not the parameter N is equal to or more than “2”.
If it is not "2" or more, the process returns to step U5.
If it is "2" or more, it is determined that the clutch 29 is in an unstable state, and the process shifts to step U9 to make the buzzer 64 perform a notification operation and stop the operation. In addition,
When the end is determined in step U5, the motor 21 is stopped and the process proceeds to the next step.

In the sixth embodiment, it is determined whether or not the clutch 29 is not in the washing clutch mode a predetermined number of times during the washing operation. In this case, it is determined whether the clutch 29 is not in the washing clutch mode. When it is determined that the clutch 29 is in the unstable state, the clutch unstable state during the washing operation can be reliably detected.

That is, during the washing operation, since the motor 21 is driven in the forward and reverse directions and the laundry and the water in the rotary tub 4 are agitated accordingly, an external force acts on the clutch 29. I do. Thereby, the clutch 29
In some cases, the second engagement means 40 may slightly move temporarily to enter a state other than the washing clutch mode.

After that, however, it may return to the washing clutch mode. However, according to the above-described embodiment, by not being the clutch mode for washing twice or more,
Since it is determined that the clutch is in the unstable state, the accuracy of the determination is high, and the clutch unstable state during the washing operation can be reliably detected. According to this embodiment, when the clutch unstable state is determined, the buzzer 6
4, the notification operation can be performed, so that the occurrence of the clutch unstable state can be notified, and prompt response can be made.

FIG. 21 shows a seventh embodiment of the present invention.
Corresponding to the invention of the present invention), and in this embodiment,
The following points are different from the sixth embodiment. That is, step V
In step 8, it is determined whether the parameter N is equal to or greater than "2". If the parameter N is equal to or greater than "2", it is determined that the clutch 29 is in an unstable state, and the process proceeds to step V9 and subsequent steps. In this step V9, the motor 21 is stopped (the stirring operation by the stirring body 5 is stopped). Then, in step V10, the geared motor 47 is energized to rotate the control lever 46 in the direction of arrow A (switch to the dehydrating clutch mode). Then, the process shifts to step V11 to execute an operation of switching the clutch 29 to the washing clutch mode. As described above in the first embodiment, this switching operation is performed by turning off the geared motor 47 to rotate the control lever 46 in the direction of arrow B and rotating the rotor 2.
5 is rotated in the direction of arrow C at a low speed.

Thereafter, the flow shifts to step V12, and if the reed switch 44 is ON, the motor 21 is rotated forward and backward (the stirring operation is restarted), and the flow returns to step V5. If the process proceeds to step V12 and the reed switch 44 is not on, the buzzer 64 is notified (step V14) and the operation is stopped (step V15).

According to the seventh embodiment, when the unstable clutch condition is determined ("YES" in step V8)
The stirring operation by the stirring body 5 is stopped and the clutch 29
To the dehydrating clutch mode, and the clutch 29 is switched to the washing clutch mode, and then the agitation operation is restarted. The state can be reliably returned to the washing clutch mode, and the washing operation can be favorably continued.

FIG. 22 shows an eighth embodiment of the present invention.
Corresponding to the invention of the present invention), and in this embodiment,
It is characterized by the stirring start control in the washing operation, the clutch instability determination control and the unstable situation handling control related thereto. That is, when the washing operation is started (when the washing operation program starts), water supply is started as shown in step W1. In this case, as can be seen from steps W2 and W3, when the stirring start water level (water level lower than the set water level) is reached, the forward / reverse rotation of the motor 21 is started.

Next, at step W4, it is determined whether or not the reed switch 44 has been turned on. Reed switch 4
If it is turned on, that is, if it is in the washing clutch mode, the process proceeds to step W5, where it is determined whether or not the water level in the rotary tub 4 has reached the set water level. Then, the water supply is stopped. Thereafter, steps W7 to W18 are executed according to the situation.
Steps W7 to W18 are the same as steps V5 to V16 of the seventh embodiment (FIG. 21).

On the other hand, if it is determined in step W4 that the reed switch 44 is not turned on, the process proceeds to step W1.
Steps 9 to W27 are executed according to the situation. That is, if the number of times that the reed switch 44 is not turned on (this is counted in step W19) is two or more (“YES” in step W20), the motor 2 is stopped in step W21.
1 is stopped, the geared motor 47 is energized in step W22 (switching operation to the dehydrating clutch mode is performed), and step W22 is performed.
At 23, the geared motor 49 is turned off, and the rotor 25 makes at least one rotation in the direction of arrow C (switching operation to the washing clutch mode).

As described above, according to this embodiment, when the unstable state of the clutch 29 is determined during the water supply operation period from the stirring start water level to the set water level, the unstable situation shown in steps W21 to W23 is dealt with. The operation (including the stop of the stirring operation) is performed, but the water supply operation is not stopped. This can prevent the water supply time from being extended. That is, when an unstable state is determined during the water supply operation during the washing operation, both the stirring operation and the water supply operation may be stopped. Stopping the stirring operation is effective because it eliminates one of the causes of clutch instability, but the water supply operation is stopped because the stop is not so related to the removal of the cause of clutch instability. Is not effective, and it takes time to supply water to the set water level. However, this is not the case in this embodiment.

[0083]

As apparent from the above description, the present invention has the following effects. According to the first aspect of the present invention, when the lever is operated to switch the clutch from the washing clutch mode to the dehydrating clutch mode, it can be determined whether or not the clutch state is unstable. When the situation is determined, the lever is operated again, so that the clutch switching can be reliably performed.

According to the second aspect of the present invention, when the unstable clutch state is determined, the motor is intermittently driven, and then the lever is operated again, so that the clutch switching is further ensured. According to the third aspect of the present invention, the dehydration switching retry control means changes the intermittent drive mode of the motor according to the detection result of the laundry amount detection means, so that the motor is driven without excess or shortage. Thus, it is possible to ensure the clutch switching.

According to the fourth aspect of the present invention, since the motor is intermittently driven after water is supplied to the rotary tub to a preset water level, the presence of the laundry in the rotary tub is changed. As a result, clutch switching can be reliably performed. According to the fifth aspect of the present invention, a series of controls such as the determination of the washing clutch mode by the clutch switching determining means, the intermittent driving of the motor, and the re-operation of the lever can be executed a plurality of times. Even if the clutch switching is uncertain in the first series of control, the motor drive time in the intermittent drive of the motor is lengthened in the second and subsequent times, so that the clutch switching can be more reliably performed. Become.

According to the sixth aspect of the present invention, it is determined whether or not the clutch is not in the washing clutch mode for a predetermined number of times during the washing operation, and it is determined that the clutch is not in the washing clutch mode for the predetermined number of times or more. Occasionally, the clutch condition determining means for determining that the clutch is in an unstable condition is provided, so that the clutch unstable condition during the washing operation can be reliably detected, and when the clutch unstable condition is determined, the alarm is notified. Therefore, occurrence of an unstable clutch condition can be notified, and prompt response can be made.

According to the seventh aspect of the present invention, when it is determined that the clutch is in an unstable state, the agitating operation by the agitator is stopped, the clutch is switched to the dehydrating clutch mode, and then the clutch is switched to the washing clutch mode. Since the operation for dealing with an unstable situation such as restarting the stirring operation after the operation is performed, even if the clutch state is unstable, the clutch state can be reliably returned to the washing clutch mode, and the washing operation can be favorably continued. .

According to the eighth aspect of the present invention, when the clutch unstable state determination timing is during the water supply operation during the washing operation, the agitation operation is stopped, and the unstable state coping operation is performed while the water supply operation is continued. Therefore, it is possible to eliminate one of the causes of clutch instability and prevent the water supply time from becoming long.

[Brief description of the drawings]

FIG. 1 is a block diagram of an electrical configuration showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the washing machine.

FIG. 3 is a longitudinal sectional side view of a mechanism part.

FIG. 4 is a longitudinal sectional side view of a mechanism portion having different clutch states.

FIG. 5 is a partially cutaway side view of a clutch portion.

FIG. 6 is a partially broken side view showing different clutch states.

FIG. 7 is an exploded perspective view of main parts of a motor and a clutch.

FIG. 8 is an enlarged perspective view of a clutch part.

FIG. 9 is a partial perspective view of a switching member.

10A is a longitudinal side view of a reed switch and a cover portion, and FIG. 10B is a bottom view of the same portion.

FIG. 11 is a bottom view of the water receiving tank shown without the rotor.

FIG. 12 is a bottom view of a clutch part.

FIG. 13 is a bottom view of a clutch portion in a different state.

FIG. 14 is a perspective view of a control lever.

FIG. 15 is a flowchart showing control contents related to clutch unstable state determination.

FIG. 16 is a view corresponding to FIG. 1, showing a second embodiment of the present invention;

FIG. 17 is a view corresponding to FIG. 1, showing a third embodiment of the present invention;

FIG. 18 is a view corresponding to FIG. 1, showing a fourth embodiment of the present invention.

FIG. 19 is a view corresponding to FIG. 1, showing a fifth embodiment of the present invention.

FIG. 20 is a view corresponding to FIG. 1, showing a sixth embodiment of the present invention;

FIG. 21 is a view corresponding to FIG. 1, showing a seventh embodiment of the present invention.

FIG. 22 is a view corresponding to FIG. 1, showing an eighth embodiment of the present invention.

FIG. 23 is a diagram corresponding to FIG. 4 of the washing machine before the improvement of the present invention.

FIG. 24 is a diagram corresponding to FIG. 3;

FIG. 25 is a diagram corresponding to FIG. 5;

[Explanation of symbols]

4 is a rotary tank, 5 is a stirring body, 15 is a tank shaft, 18 is a stirring shaft,
21 is a motor, 21a and 21b are position detecting elements (rotation speed detecting means), 22 is a stator, 25 is a rotor, 29 is a clutch, 30 is a holder, 31 is a switching member, 36 is an operated part, and 39 is a first member. Engagement means, 40 is a second engagement means,
42 is a magnet, 44 is a reed switch, 45 is a clutch switching determining means, 46 is a control lever, 47 is a geared motor,
55 is an inverter main circuit, 56 is a control circuit (unstable condition determination means and dehydration switching retry control means), and 64 is a buzzer (notification means).

Claims (8)

[Claims] A rotating tank, a stirring member disposed in the rotating tank and rotated by a motor, a first engaging means, a second engaging means, and a lever. A dewatering clutch mode in which the first engagement means is engaged to operate the lever to operate to connect the rotary tub and the stirrer, and the lever is operated when the washing operation is performed. A clutch for disengaging the rotary tub from the stirrer by engaging the second engagement means and switching between a washing clutch mode for fixing the rotary tub; and whether the clutch is a washing clutch mode. Clutch switching determining means for determining whether or not the clutch is washed by the clutch switching determining means when the lever is operated to switch the clutch from the washing clutch mode to the dehydrating clutch mode. Clutch state determining means for determining whether or not the clutch is in a latch mode, and determining that the clutch is in an unstable state when in the wash-side clutch mode; and And a dehydration switching retry control means for operating the washing machine again. 2. The dehydration switching retry control means is characterized in that when the clutch state determination means determines that the clutch is unstable, the lever is operated again after intermittently driving the motor. The washing machine according to claim 1, wherein 3. A laundry amount detecting means for detecting an amount of the laundry, wherein the dehydration switching retry control means changes an intermittent drive mode of the motor in accordance with a detection result of the laundry amount detecting means. The washing machine according to claim 2, wherein: 4. The dehydration switching retry control means supplies water to a preset water level in the rotary tank when the clutch state determination means determines that the clutch is unstable, and drives the motor intermittently. The washing machine according to claim 1, wherein the washing machine is operated again. 5. The dehydration switching retry control means is capable of executing a series of controls, such as determination of a washing clutch mode by a clutch switching determination means, intermittent driving of a motor, and re-operation of a lever, a plurality of times. 3. The washing machine according to claim 2, wherein when the series of controls is performed for the second time or later, the motor driving time in intermittent driving of the motor is lengthened. 6. A dewatering operation, comprising: a rotary tub, a stirrer disposed in the rotary tub and rotated by a motor, a first engaging means, a second engaging means, and a lever. A dehydrating clutch mode in which the first engagement means is engaged to operate the lever to operate to connect the rotary tub and the stirrer, and the lever is operated when the washing operation is performed. A clutch for disengaging the rotary tank and the agitator by engaging the second engaging means and switching between a washing clutch mode for fixing the rotary tank, and whether the clutch is a washing clutch mode. Determining whether the clutch is not in the washing clutch mode by the clutch switching determining means during the washing operation for a predetermined number of times or more; A clutch status determining means for determining that the clutch is in an unstable state when it is determined that the clutch is not in the upper washing clutch mode; and an alarm when the clutch status determining means determines that the clutch is in an unstable state. A washing machine comprising: a clutch unstable state notification control means for operating. 7. A rotating tank, a stirrer disposed in the rotating tank and rotated by a motor, a first engaging means, a second engaging means, and a lever, for performing a dehydrating operation. A dewatering clutch mode in which the rotating tank and the stirrer are connected by engaging the first engagement means based on operating the lever, and operating the lever when performing a washing operation. A clutch for switching between a washing clutch mode for releasing the connection between the rotary tub and the stirrer and fixing the rotary tub by engaging the second engagement means based on the clutch operation; Clutch switching determining means for determining whether or not the clutch is not in the washing clutch mode by the clutch switching determining means during the washing operation for a predetermined number of times or more. When it is determined that the clutch state is not the predetermined number of times or more, the clutch state determining unit determines that the clutch is in an unstable state. When the clutch state determining unit determines that the clutch is in an unstable state, stirring is performed. An unstable situation handling operation of executing an unstable situation handling operation of stopping the body stirring operation, switching the clutch to the dehydrating clutch mode, switching the clutch to the washing clutch mode, and then restarting the stirring operation. And a washing machine. 8. The washing operation is performed in a pattern in which a stirring operation by the stirring body is started from a point in time when a water supply water level reaches a predetermined water level lower than a set water level, and after reaching the set water level, the water supply is stopped to continue the stirring operation. The unstable situation handling means stops the stirring operation and stops the water supply operation when the clutch unstable state determination timing by the clutch situation determination means is during the water supply operation during the washing operation. The washing machine according to claim 7, wherein an unstable situation handling operation is executed while continuing.