JPH02198593A - Dehydrating and washing machine - Google Patents

Abstract

PURPOSE:To silence a device when a drain valve and a clutch device are set in a released and connected state and when they are reset, by making a reverse- rotation-proof mechanism reactive again, after the mechanism is once made active on the way of the reset working of the drain valve and a lever. CONSTITUTION:When dehydrating operation is performed for a specified time, then a washing motor 5 and an electromagnet 35 are electrically interrupted(time point of T2). By this electrical interruption, a reverse-rotation-proof mechanism 32 is made reactive, and so by a valve body 15, a lever 19, and a brake lever 26, along with the reverse rotation of a valve motor 30 with the spring force of a compression coil spring 16 and torsion coil springs 22 and 27 as resetting elastic members, a wire 37 is turned back from a take-up roller 34 and is reset- worked. Then, in the course of the reset working, for example, after the electromagnet 35 is electrically interrupted, at the time point (time point of T3) of the lapse of 0.5 second, the electromagnet 35 is electrified again. Then, the reverse-rotation-proof mechanism 32 is made active again, and so the reverse, rotation of the valve motor 30 is suppressed, and then, the valve body 15, the lever 19, and the brake lever 26 are once stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Field of Industrial Application)] The present invention relates to a dehydrating and washing machine having a structure in which a drain valve is opened by a valve motor.

(Prior Art) As is well known, in a washing machine for dewatering and dewatering, a rotary tank is rotated at high speed by a washing motor to perform dehydration, and the dehydration is performed with a drain valve open.

Therefore, during dehydration, it is necessary to simultaneously open the drain valve and connect the clutch device that transmits the rotation of the washing motor to the rotating tub. Therefore, conventionally, a lever for operating a clutch device is operated in conjunction with the opening operation of the drain valve.

In this case, an electromagnet is generally used as the source for opening the drain valve, but this generates a loud collision noise when the iron core is attracted. Therefore, it has been considered to use a motor as the source for opening the drain valve in order to reduce noise.

(Problem to be Solved by the Invention) In the case where a motor is used as the opening operation source for the drain valve described above, the return (closing) of the drain valve and the return (clutch device disengagement) are generally performed using a return spring. configured to do so.

However, the drain valve is fine because its valve body is made of an elastic material such as rubber, but the lever for operating the clutch device is made of metal, so when it is disconnected, it hits the clutch device side member with force. This causes a collision sound and reduces the noise reduction effect by half.

The present invention has been made in view of the above circumstances, and its purpose is to prevent the generation of loud collision sounds not only when the drain valve and clutch device are opened and connected, but also when they return, thereby making it more reliable. To provide a washing machine for dehydration and dehydration, which can be made quieter.

[14th feature of the invention] (Means for solving the problem) In order to achieve the above object, the dehydrating and washing machine of the present invention has the following features:
A clutch device which has been brought into a disengaged state by engagement of an operating lever is disengaged and disengaged in conjunction with an opening operation of a drain valve in order to transmit the rotation of a washing motor to a rotating tub during dewatering. In the case where the connected state is made by
A valve motor that, when energized, causes the drain valve and lever to open and disengage against the elastic force of a return elastic member, and is then de-energized; A reversal prevention mechanism that is activated to prevent the valve motor from reversing, thereby maintaining the drain valve and lever in an open state and a disengaged state, and is deactivated upon completion of dehydration to allow the drain valve and lever to return. and a reverse rotation prevention mechanism,
After the drain valve and lever are once activated during the return operation, they are deactivated for 11 degrees.

(Operation) According to the above means, when the dewatering process begins, the drain valve is first opened by energizing the valve motor, and the lever is disengaged and the clutch device is brought into the connected state. Then, when the valve motor is cut off, the reverse rotation of the valve motor is prevented by the reverse rotation prevention mechanism, so that the drain valve and the clutch device are maintained in the open state and the connected state. In this state, the washing motor is energized, and its rotation is transmitted to the rotating tub via the clutch device to perform a dewatering operation.

When the washing motor is de-energized (the dewatering operation is completed), the reverse rotation prevention mechanism is disabled, and the drain valve and lever return to their original positions as the valve motor reverses. During this return operation, the reverse rotation prevention mechanism is activated, so that the reverse rotation of the valve motor is temporarily stopped, and accordingly, the return operation of the drain valve and lever is also temporarily stopped.

After this, the reversal prevention mechanism is disabled again, so the drain valve and lever return to normal operation again. Therefore, the speed at which the lever comes into contact with the fir material on the clutch device side is reduced, and no loud collision noise is generated when the lever returns.

(Example) An embodiment of the present invention will be described below based on the drawings.

First, the schematic structure of the dehydrating and washing machine will be explained with reference to FIG. 1 is a water receiving tank disposed inside the outer box 2; 3 is a rotating tub for both washing and dehydration disposed inside the water receiving tank 2; 4 is a container-shaped stirring body disposed inside the rotating tub 3; 5 is a washing motor; 6 is a speed reduction device comprising a planetary gear mechanism that further decelerates the rotation of the washing motor 5 transmitted to the drive shaft 8 via the belt transmission mechanism 7 and transmits it to the washing shaft 9 to rotate the agitator 4; , 10 is a clutch device that transmits the rotation of the drive shaft 8 to the dehydration shaft 11 during dehydration to rotate the rotary tub 3 integrally with the agitator 4, and 12 is a clutch device that brakes the dehydration shaft 11 during washing to prevent the rotation of the rotary tub 3. This is a brake device that restrains the water and releases the restraint when dehydrating. Further, in FIG. 1, reference numeral 13 denotes a drain valve for discharging the water in the water tank 1. This is attached to the bottom of the water tank 1 (not shown in FIG. 5), and is installed inside the valve case 14. The provided valve body 15 is connected to the valve case 14 by a compression coil spring 16.
is biased in the direction of closing the outlet 14a.

As shown in FIG. 6, the clutch device 10 includes a sleeve 17 having ratchet teeth 17a, and this sleeve 1.
A clutch spring 18 is wound around the drive shaft 8 and the dewatering shaft 11 within the clutch spring 7 and has a lower end fixed to the sleeve 17. A lever 19 that operates this clutch device 10 is rotatably pivoted by a shaft 21 to a flange 20a of a cover 20 attached to the bottom of the water receiving tank 1 so as to surround the deceleration device 6, and is supported by a torsion coil spring 22. The direction in which the sleeve 17 engages with the ratchet fM17a (
It is biased in the direction of arrow A in FIG.

The clutch device 10 is in an uncoupled state when the lever 19 is engaged with the ratchet teeth 17a as shown by the solid line in FIG. When the clutch spring 18 is rotated in the direction to release the engagement with the ratchet teeth 17a, the clutch spring 18 is tightened around the drive shaft 8 and the dehydration shaft 11, and the rotation of the drive shaft 8 and therefore the rotation of the washing motor 5 is transferred to the dehydration shaft 11. It becomes a connected state to transmit. The brake device 12 also includes a case 23 of the deceleration device 6, which rotates integrally with the dehydration shaft 11, as shown in FIG.
A brake band 24 is wound around this as a brake drum. The brake band 24 has one end fixed to the flange 20a of the cover 20,
The other end is connected to a brake lever 26 which is rotatably pivoted by a lever 25 on the flange portion 20a. This brake lever 26 is biased by a torsion coil spring 27 in the direction of tightening the brake band 24 to the case 23 (in the direction of arrow B in FIG. 1), and when it rotates in the opposite direction of arrow B, At an early stage after the start of the movement, the lever 19 comes into contact with the projection 19a (see FIG. 1) of the lever 19 to rotate the lever in the direction opposite to the arrow A. Note that two grooves 28 are formed on the upper surface of the case 23. This groove 28 collects the lubricating oil when it drips from the ball bearing 29 that supports the dewatering shaft 11, and the collected lubricating oil is scattered by the centrifugal force of the rotating case 23 during the dewatering operation. This is to prevent it from adhering to the brake band 24.

Now, in FIG. 1, 30 is a valve motor fixed to the bottom of the water receiving tank 1, and as shown in FIG. A take-up roller 34 is attached to the output shaft 33. The reversal prevention mechanism 32 is composed of a one-way clutch mechanism using a 7IS6Ii stone 35 as a driving source, one clutch element 32a of which is fixed to one gear of the gear train 31, and the other clutch element 32b is non-rotatable. and is movable in the axial direction. And ° electromagnet 35
When energized, the clutch element 32b moves in the direction of arrow C and engages with the clutch element 32a, and when the electromagnet 35 is de-energized, the clutch element 32b moves in the opposite direction of arrow C by the spring force of the compression coil spring 36. Move the clutch element 32
Release the mesh with a.

Therefore, the winding roller 30 and the valve body 15 of the drain valve 13
As shown in FIG.
The winding roller 3 is connected by a slider 38 supported by the flange portion 20a of
0 winds up the wire 37 by rotating in the direction of arrow E and slides the slider 38 in the direction of arrow E, thereby pulling the valve body 15 and opening it. And slider 3
8 is provided with a protruding pin 40 that is inserted into a long hole 26a formed in the brake lever 26, and the brake lever 26 is opened when the valve body 15 is opened when the wire 37 is wound.
is rotated in the opposite direction of arrow B.

It should be noted that this dehydrating/washing machine is controlled by a control device mainly composed of a microcomputer (not shown).

Next, the operation of the above structure will be explained with reference to the time chart of FIG. 3 regarding dehydration, which is directly related to this embodiment. Note that in the time chart of FIG. 3, the shaded portion indicates the energization period. When moving to the dewatering process, first the valve motor 3
0 is energized and the take-up roller 34 is rotated in the direction of the arrow. At this time, the electromagnet 35 is also energized and the reverse rotation prevention mechanism 3
The second clutch element 32b is engaged with the clutch element 32a, but since the rotation of the valve motor 30 is in the forward direction, there is no possibility that the rotation in the forward direction will be inhibited by the reverse rotation prevention mechanism 32.

Now, when the take-up roller 34 rotates, the wire 37 is taken up, so the slider 38 is pulled in the direction of arrow E, and the valve body 15 begins to open against the spring force of the compression coil spring 16. Immediately after the slider 38 starts moving in the direction of arrow E, the bottle 40 comes into contact with one end of the elongated hole 26a, so that the brake lever 26 rotates in the opposite direction of arrow B against the spring force of the torsion coil spring 27. Immediately after this, the brake lever 26 comes into contact with the protruding piece 19a, so the lever 19 also begins to rotate in the direction opposite to the arrow, against the spring force of the torsion coil spring 22. When the valve body 15 starts the opening operation in this way, the brake lever 26 rotates in conjunction with this and begins to loosen the brake band 24, and the lever 19 rotates to release the engagement with the ratchet teeth 17a. start.

Then, when the take-up roller 34 rotates by a predetermined angle, the valve body 1
5 is completely opened, and the brake band 22 is completely opened, and the brake band 22 is
When the brake is released, the clutch device 10 becomes connected. Then, a switch (not shown) that detects the rotation angle of the take-up roller 34 is operated, and the valve motor 30 is thereby activated.
is de-energized and the washing motor 5 is energized (time T1 in FIG. 3). In this case, since the clutch elements 32a and 32b of the reversal prevention mechanism 32 are engaged, the valve motor
0 and prevents the valve motor 30 from reversing, so the valve body 15, lever 19, and brake lever 26 are rotated by the spring force of the compression coil spring 16, torsion coil springs 22, and 27. There is no risk of this happening, and the drain valve 1
3 is maintained in an open state, and the brake device 12 and clutch device 10 are maintained in a brake-released state and a connected state. FIG. 4 shows the change in the force acting on the wire 37 in the return direction (direction opposite to arrow E) during the process from when the drain valve 13 is in the closed state to when it is in the completely open state, and shows the change in the force acting on the wire 37 in the return direction (direction opposite to the arrow E). Then, the spring force of the torsion coil spring 27 is added to the spring force of the compression coil spring 16, and the spring force of the torsion coil spring 22 is further added at time M, so the tensile force acting on the wire 37 changes in stages. It is.

In addition, the compression coil spring 39 is used for the valve motor 3 when the valve body 15 is fixed to the valve case 14 due to freezing or the like.
This is to prevent overload of 0.

Now, when the washing motor 5 is energized, its rotation is transmitted to the dewatering shaft 11 via the clutch spring 18, thereby performing a dewatering operation in which the rotary tub 3 rotates. and,
When the dewatering operation waits for a predetermined time, the washing motor 5 and the electromagnet 35 are cut off (at time T2 in FIG. 3). This electromagnet 3
5 disables the reverse prevention mechanism 32, so the valve body 15, lever 19, and brake lever 26 are activated by the spring force of the compression coil spring 16 and torsion coil springs 22 and 27 as elastic members for return. Accompanied by the reverse rotation of the valve motor 30, the wire 37 is unwound from the take-up roller 34, and the return operation is performed. Specifically, the valve body 15 moves in the closing direction, and the lever 19 and the brake lever 26 move in the direction of the arrows A and 26, respectively. It begins to rotate in direction B. During these return operations, the electromagnet 35 is energized again, for example, after 0.5 seconds have elapsed (time T9 in FIG. 3) after the electromagnet 35 is de-energized. Then, the reverse rotation prevention mechanism 32 is enabled again, so that the valve motor 30 is prevented from reversing, and the valve body 15, lever 19, and brake lever 26 are thereby temporarily stopped. Then, the re-energization of this electromagnet 31 is 0.
When this continues for 2 seconds, the electromagnet 31 is then cut off again (at time T6 in FIG. 3). With this, valve body 15, lever 1
9 and the brake lever 26 start a return operation, and the valve body 15 returns to the state where the outlet 14a is closed, and the lever 19 engages with the ratchet teeth 17a of the sleeve 17 to disengage the clutch device 10. The connected state is restored, and the brake lever 26 tightens the brake band 24 to the case 23, thereby returning the brake device 12 to the braking state. When this lever 19 engages with the ratchet teeth 17a, the lever 19 comes into contact with the ratchet teeth 17a, but
Since the lever 19 temporarily stops during its return and then resumes its return operation, the compression coil spring 16 and torsion coil spring 22 at the time of resuming the return operation.
The spring force of and 27 is small (see point N in Figure 4),
In addition, since the return distance is short, the speed does not increase significantly until the time of contact. Therefore, when the lever 19 comes into contact with the ratchet teeth 17a, the rotational speed is small, and no large collision occurs due to the contact. Of course, valve body 1
Since 5 is made of an elastic material, there is no risk of making a large impact sound when it comes into contact with the outlet 14a.

[Effects of the Invention] As is clear from the above description, according to the dehydrating and washing machine of the present invention, the reversal prevention mechanism is activated once during the return operation of the drain valve and lever, so that the drain valve and lever The return operation of the lever stops once and then returns again from a state of zero return speed, so the speed at which the lever comes into contact with the member on the clutch device side is slow, and there is no risk of making a loud collision noise, making it quieter. It is something that can be achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an enlarged bottom view showing a schematic configuration of the main parts, FIG. 2 is an enlarged sectional view showing the valve motor expanded, and FIG. 3 is a time chart. , 4th
The figure shows the relationship between the stroke of the valve body and the tensile force applied to the wire, FIG. 5 is a longitudinal sectional side view of the entire washing machine, and FIG. 6 is an enlarged longitudinal sectional view of the main parts. In the figure, 3 is a rotating tank, 1O is a clutch device, 12 is a brake device, 13 is a drain valve, 15 is a valve body, 16 is a compression coil spring (elastic member for return), 17 is a sleeve, 19 is a lever, and 22 is a Torsion coil spring (elastic member for return),
26 is a brake band, 27 is a torsion coil spring (elastic member for return), 30 is a valve motor, 32 is a reverse rotation prevention mechanism, 34 is a winding roller, and 35 is an electromagnet. Applicant Toshiba Corporation Figure 2 Figure J Figure 1 Figure 3 Figure Figure

Claims (1)

[Claims] 1. The clutch device, which has been disengaged due to the engagement of the operation lever, is disengaged in conjunction with the opening operation of the drain valve in order to transmit the rotation of the washing motor to the rotating tub during dewatering. In the valve motor, which is brought into a connected state by energizing, the drain valve and the lever are opened and disengaged against the elastic force of a returning elastic member, and then the valve motor is de-energized. The drain valve and the lever are maintained in an open state and a disengaged state by preventing the reverse rotation of the valve motor when the power is cut off, and are disabled when the dewatering is completed. It is characterized by comprising a reversal prevention mechanism that allows the drain valve and the lever to return, and wherein the reversal prevention mechanism is once activated during the return operation of the drain valve and the lever, and then deactivated again. Washing machine with dehydration function.