JPS6043155B2 - Agitation washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an agitating washing machine in which an agitating blade for agitating and washing laundry is connected to a motor rotor.
When the motor rotates continuously in one direction, that is, when the rotation angle does not need to be controlled, the opening and closing operation of the switching element changes the rotation angle of the stirring blade, that is, the rotation angle of the motor rotor. This is to prevent this from happening.

Conventionally, in this type of washing machine, the rotation direction and angle of the motor are controlled by opening and closing a reed switch using an opening/closing mechanism, such as a magnet, provided on the rotating shaft of the motor rotor. Even in the dehydration process that does not require control, the reed switch and the opening/closing mechanism are connected, and the opening/closing operation of the reed switch is performed.

The number of openings and closings at this time is ten times as many as the number of openings and closings during washing, and there was a problem that reliability could not be ensured over a long period of time in relation to the operational life of the reed switch.
The present invention solves these conventional problems, and one embodiment thereof will be described in detail below with reference to the accompanying drawings.

In the figure, 1 is an outer frame, 2 is an outer tank, and 3 is a washing tub and dewatering tub. Reference numeral 4 denotes an agitation blade that agitates the laundry in the washing tub/dehydration tub 3; 5 refers to a clutch mechanism that fixes or rotatably switches the coaxial rotating shafts of the agitation blade 4 and the washing tub/dehydration tub 3; and 6, the aforementioned A linear motor having at least one stator and at least one rotor connected to a rotating shaft, 7 is an opening/closing mechanism attached to the rotor shaft 6', and is provided at an angle corresponding to the rotation angle (for example, 1150). It consists of two magnets with different polarities.

8 A switching element such as a lead switch (self-holding type), which is opened and closed by the opening and closing mechanism.

9 is a solenoid that operates the drain valve, clutch mechanism, brake, etc. during the dewatering process, and 10 is a vibration isolation mechanism in which the outer tank 2 is suspended from the outer frame 1.

In FIGS. 3 and 4, reference numeral 11 is an operating lever that performs a seesaw operation by the operation of the solenoid 9. In the case of FIGS. A shielding plate 12 made of magnetic material is provided to be inserted.

In the case of FIG. 4, the switching element 8 is fixed to a slide plate 13'' that slides on the slide fixing part 13, and is pulled toward the center of the shaft by a spring 14.
FIG. 5 shows the circuit configuration, 15 is an AC power supply, 16 is a water supply valve, 17 is a water level switch, 18a and 18b are gate control semiconductor switching elements (hereinafter referred to as triacs) that control the rotational direction of the motor 6, and 19 is a 20 is a capacitor for starting and operating the motor 6; 20 is a current limiting resistor for controlling the gates of the triaxes 18a and 18b;
Reference numeral 1 denotes a relay, which has a switching contact R1 for igniting the gate of either one of the triacs 18a, 18b.

T1 to T5 indicate cam contacts whose opening and closing are controlled by the timer motor 22, and a program chart showing the opening and closing states thereof is shown in FIG. Next, to explain the specific operation, when the timer is set and the cam contact T1 is closed, the timer motor 22 is activated and the contact of the water level switch 17 is closed.
Closed on the side. Next, the cam contact T3 closes and the water supply valve 16 operates to start water supply. When the water reaches a certain water level, the contact of the water level switch 17 is switched and the N/0 side is closed. At this time, the water supply is stopped, and then the cam contact T5 closes to start washing. At this time, as shown by the solid line in FIGS. 3 and 4, the solenoid 9 is in an open state.
Switching element 8 is in an operating state. Now, when the switching element 8 is in the OFF state, the triax 18b becomes conductive, and the motor 6, which has a gap in the axial direction, rotates, for example, clockwise, and at the same time, the stirring blade 4 rotates.

When the rotary shaft 6'' of the motor rotates and one of the opening/closing mechanisms 7 reaches the vicinity of the switching element 8, the contacts close. When the contacts of the switching element 8 close, the relay 21 operates and the relay contact R1 becomes N-. 0 side, the triax 18a changes to a conductive state, and the motor 6 reverses.At this time, since the switching element 8 uses a self-holding type, the switching element 8 remains closed until the other opening/closing mechanism 7 (magnets of different polarity) approaches. This state is maintained.Next, when the magnets of different polarities of the opening/closing mechanism approach, the switching element 8 becomes OFF state again, and the motor 6 is reversed again.The above operation is repeated, and the washing process is completed. Then, the cam contacts T3 and T5 are opened, and when the cam contact T2 is closed, the solenoid 9 is operated and the drain valve is activated to drain the water in the tank 2, completing the draining.

As a result, the contact of the water level switch 17 is switched to the NC side, and the cam contact T2 is opened. Next, operations similar to those in the washing process are performed in the rinsing process, and water supply, rinsing, and drainage processes are performed. When the dewatering process begins, the water level switch 17 has a contact on the N-C side, the cam contacts T2 and T4 close and the solenoid 9 operates, and at the same time the motor 6 rotates in only one direction regardless of the triaxes 18a and 18b. By the operation of the clutch mechanism 5, the washing tub/dehydrating tub 3 becomes rotatable and the dehydrating process is started. At this time, according to the configuration shown in FIG. 3, the plunger is sucked by the operation of the solenoid 9, the operating lever 11 is moved, and the shielding plate 12 is inserted between the opening/closing mechanism 7 and the switching element 8, so that the opening/closing mechanism The magnetic force of 7 is weakened at the position of switching element 8, and switching element 8 no longer performs opening/closing operations.

The shielding plate 12 does not necessarily need to be inserted between the switching element 8 and the opening/closing mechanism 7, and by appropriately selecting the magnet of the opening/closing mechanism, it is possible to prevent the opening/closing operation by simply bringing it close. Also, according to Figure 4,
By pulling the magnet of the opening/closing mechanism fixed to the slide plate 13'' in the axial center direction by the spring 14, the relative distance between the opening/closing mechanism 7 and the switching element 8 is increased, and the switching element 8 does not perform the opening/closing operation.

When the dewatering process is completed, the cam contact T1 is opened and washing is completed. As mentioned above, during washing and rinsing, the switching element for switching the rotation angle is in the open/close state,
In the dehydration process, the operational life of the switching element can be extremely reduced by not performing opening/closing operations.

For example, if the number of operations during washing and rinsing is 60 times/minute and the number of operations during spin-drying is 1000 times/minute, and each operation time is 1 time for washing and rinsing and 1 time for spin drying, then approximately 1 /1
The number of operations can be suppressed to zero. Here, we have explained the combination of a reed switch and a magnet as the switching element 8, but as a combination of an opening/closing mechanism and a switching element, there are a microswitch and a magnet or a Hall element and a magnet, and these can be used in combination. The same thing can be achieved with

As described above, in the agitation type washing machine of the present invention, the switching element that changes the rotation angle of the motor is not opened or closed during the dehydration process in which the motor rotates continuously in one direction, which improves the reliability of the switching element. This greatly improves performance.

If the means for preventing the opening/closing operation of the switching element is operated in conjunction with the solenoid that operates the drain valve, clutch mechanism, brake, etc., the mechanism is simple and highly reliable control can be realized.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a cutaway cross-sectional view of an agitation type washing machine showing an embodiment of the present invention, Fig. 2 is a bottom view of the main parts, and Figs. 3 and 4 are respectively the angle switching section. FIG. 5 is a circuit configuration diagram, and FIG. 6 is a program chart diagram of the cam contact. 3... Washing tub/dehydration tank, 4... Stirring blade, 5... Clutch mechanism, 6... Motor, 6
1... Rotor shaft, 7... Opening/closing mechanism, 8...
...Switching element, "9... Solenoid, 11... Operation lever.

Claims (1)

[Scope of Claims] 1. A washing/dehydrating tank and an agitating blade having coaxial rotating shafts, a motor connecting the rotating shaft to a rotor via a clutch mechanism, and a switching element for switching the rotational direction of the motor. and an agitation mechanism that is provided on the rotor shaft and that opens and closes the switching element using a magnetic field, and means that prevents the switching element from opening and closing during the dehydration process in which the motor rotates continuously in one direction. washing machine. 2. The agitation type washing machine according to claim 1, wherein the means for preventing the switching element from opening and closing operates in conjunction with a solenoid that operates during the dewatering process.