JPS6316394Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The invention consists of a peripheral wall of a washing tub consisting of a fixed peripheral wall part and a movable peripheral wall part, and the cleaning effect is mainly achieved through frictional contact between these two peripheral walls and the laundry. About the washing machine you get.

[Technical background of the invention and its problems]

Among conventional washing machines, those with rotary vanes that generate a water flow using rotary vanes to achieve the cleaning effect require a large washing tank volume relative to the amount of clothes because the washing machine essentially uses a water flow to move the laundry. , which means that the amount that can be washed at one time is small. Furthermore, when the amount of cloth is small, the water flow becomes extremely strong, resulting in excessive cleaning, while when the amount of cloth increases, the water flow rate decreases and the cleaning effect tends to decrease rapidly. Furthermore, since contact between the laundry and the rotating blades occurs only incidentally and only partially, it is not possible to expect a scrubbing effect over the entire laundry, which tends to cause so-called uneven washing, and the laundry gets damaged quickly. .

On the other hand, a new method has recently been developed in which the rotating blades have been removed, in which the entire washing tank is intermittently rotated while containing water and laundry, and the cleaning effect is obtained by the speed difference between the water and the laundry. Although this method has the advantage of not damaging the laundry, it has the disadvantage that the speed difference between the laundry and water is small and the movement is simple, resulting in low cleaning effectiveness. .

[Purpose of invention]

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to provide a stronger and more even cleaning effect than before and to prevent fabric damage without using the conventional rotating blades or the rotation of the entire washing tank. To provide a washing machine that is reliable, can wash a large amount of clothes at one time, and has a wide range of clothes that can maintain an appropriate washing effect.

[Summary of the idea]

The present invention forms the peripheral wall of the washing tank with a fixed peripheral wall located above and a movable peripheral wall located below,
Laundry is stored together with water in such a washing tub, and the laundry is subjected to contact frictional force with the movable peripheral wall due to forward and reverse rotation of the movable peripheral wall and frictional force received from the fixed peripheral wall. At least the inner surface of the movable peripheral wall is formed into a step-like shape whose diameter gradually increases from the lower part to the upper part, and the inner surface of the movable peripheral wall is provided with vertical ribs. This provides a strong scrubbing effect due to friction between the fixed peripheral wall and the movable peripheral wall of the laundry, especially due to the horizontal and vertical tiers, and friction between the laundry, and a strong scrubbing effect between the fixed peripheral wall and the movable laundry. Furthermore, the so-called massaging effect, which is caused by the washing even when subjected to a force in a different direction from the surrounding wall part, can be expected evenly over the entire laundry.

[Example of idea]

An embodiment in which the present invention is applied to a dehydrating and washing machine will be described below with reference to the drawings.

Reference numeral 1 denotes an outer box, inside of which a water receiving tank 2 is arranged and elastically supported by a hanging rod mechanism 3 so as to be swingable. Reference numeral 4 designates a washing tank, which essentially consists of a fixed surrounding wall and a movable surrounding wall located below the fixed surrounding wall. This is achieved by a combination of a fixed tank 5 that rotates and is stopped during washing, and an agitator 6 shaped like a shallow container. To explain this in detail below, the fixed tank 5 is placed inside the water receiving tank 2 and its outer bottom is connected to the hollow dewatering shaft 7, while the container-shaped stirring body 6 is attached to the inner circumferential wall of the fixed tank 5. It is disposed below it so as to follow it, and its outer bottom is connected to the washing shaft 8. At this time, in particular, the container-shaped stirring body 6 has a circumferential wall height approximately half the height of the fixed tank 5, that is, a depth, and its diameter gradually increases from the bottom to the top, as shown by the horizontal step 6a on the inner surface of both the inside and outside surfaces. It is shaped like a staircase,
Moreover, as shown by the vertical step 6b, a large number of vertical ribs 9 extending in the vertical direction are formed on the inner surface over the entire circumference. In addition, a large number of dehydration holes 1 are provided on the peripheral side wall of the container-shaped stirring body 6 by using the above-mentioned horizontal step 6a.
0 is formed. The fixed tank 5 is constructed by separately forming a tank lower part 5a and a tank upper part 5b and connecting them with screws 11, etc. In this embodiment, the washing tank 4 as a whole also serves as a dehydration tank. For this reason, the fixed tank 5 is provided with a balancer 12 at the upper end of the tank upper part 5b, and a dewatering hole 13 is provided in the peripheral wall.
is formed. Reference numeral 14 denotes a power control mechanism, which transmits the rotational force of the motor 15 to the washing shaft 8 at a reduced speed and alternately reverses during washing, and transmits it to the dewatering shaft 7 and washing shaft 8 during dehydration to move the fixed tank 5 into a container. a deceleration mechanism for rotating integrally with the agitator 6;
It has a built-in clutch mechanism, brake mechanism, etc. 16 is a drain valve that drains the water in the washing tank 4 to the water receiving tank 2.
It can be discharged from the bottom of the machine via a drainage hose 17. 18 is a timer;
This allows each process from washing to final dehydration to be automatically controlled.

In the above configuration, in the washing operation, the fixed tank 5 is restrained by the brake mechanism so as not to rotate, and the container-shaped agitator 6 is rotated forward and backward, so that the peripheral wall of the fixed tank 5 is exposed upward from the peripheral wall of the container-shaped agitator 6. This part is made to function as a fixed peripheral wall part of the peripheral wall of the washing tank 4, and the peripheral wall of the container-shaped stirring body 6 is made to function as a movable peripheral wall part.

Next, the operation of the above configuration will be explained. At the time of washing, water is supplied into the water receiving tank 2 and thus into the washing tank 4 in an amount comparable to that of a conventional rotary blade type washing machine, and the laundry is thrown into the washing machine. The washing operation is carried out by rotating only the container-shaped agitator 6 in forward and reverse directions while the fixed tank 5 is restrained by a brake mechanism so as not to rotate. In this embodiment, the rotational speed of the container-shaped stirring body 6 is within the range of 120 to 180 rotations per minute, and the direction of rotation is reversed approximately every 2 to 3 rotations.

Now, in such a washing operation, since the laundry comes into contact with the peripheral wall of the container-shaped agitator 6 and the peripheral wall of the fixed tank 5, in the lower part, due to frictional contact with the agitator 6, the laundry is moved as shown by the arrow in the figure. A rotational force is applied as shown by X, and the upper part receives a restraining force due to frictional contact with the fixed tank 5, and by simultaneously receiving these frictional forces in different directions, it gives a twisting or compressing effect to the laundry, and this causes the container-like agitation. This is repeated by reversing the direction of rotation of the body 6, and the centrifugal force accompanying the rotation of the container-shaped agitator 6 pushes the laundry toward the peripheral wall of the container-shaped agitator 6, and the reaction is applied to the peripheral wall of the upper fixed tank 5. By receiving the force inward from the center, an effect of vertically inverting is produced as shown by the arrow Y direction in the figure, and a complex movement is imparted. Therefore, while the laundry is subjected to a scrubbing action due to the large friction between the cloths due to the above-mentioned complicated movements and the large friction with the surrounding walls of the stationary tank 5 and the container-shaped agitator 6, the laundry is subjected to a kind of scrubbing action due to repeated twisting and compression. The container-shaped agitator 6 is also washed by massaging action, and in the case of this embodiment in particular, the container-shaped agitator 6 has both its inner and outer surfaces, especially the inner surface, formed in a step-like manner, and the inner surface is provided with vertical ribs 9. Therefore, the laundry is subjected to a stronger scrubbing action by the horizontal folding stage 6a that rises along the inner surface of the container-shaped agitator 6, and is also subjected to an even more powerful scrubbing action by the vertical folding stage 6b as it rotates. Receives washing action. Therefore, the cleaning effect is further enhanced by these, and in addition, even though the inner surface is formed into a step-like shape, the inner surface of the container-shaped stirring body 6 is formed into a step-like shape in which the diameter gradually increases from the bottom to the top, in other words, it expands upward. Because of this, the rising of the laundry and water due to centrifugal force can be smoothed out by the expanding shape, and therefore it is also possible to change the top and bottom of the laundry and water. It can be easily made and the so-called moldability can be improved. On the other hand, the vertical steps 6b formed by the vertical ribs 9 can improve the grip of the rotating laundry and provide even stronger rotational force, thereby increasing not only the scrubbing action but also the massaging action. Even better cleaning effects can be obtained. Moreover, the mechanical strength of the container-shaped stirring body 6 itself can be increased by the vertical ribs 9 and the step shape described above, and the risk of cracking or deformation of the container-shaped stirring body 6 can be minimized. .
The superior cleaning effect of the present invention is shown in Fig. 3 as an example of comparative experiment results. In Fig. 3, curve A is the case according to the present invention, and curve B is the case according to the conventional rotation. In the case of the blade method, C shows the cleaning ratio characteristic in the case of the washing tank rotation method, which was considered prior to this invention, and it can be seen that the cleaning effect of the present invention is high.

Furthermore, as mentioned above, the laundry is moved by frictional contact with the peripheral walls of the stationary tub 5 and the container-shaped agitator 6, so as the amount of laundry increases, the frictional force also increases, and the degree of movement of the laundry decreases as the amount of laundry increases. Therefore, the rate of decrease in cleaning effectiveness is small. Moreover, when the amount of laundry is small, the frequency of contact between the container-shaped agitator 6 and the surrounding wall is low, and the contact friction force is extremely small, mainly due to the low-speed rotation of the container-shaped agitator 6 with a large surface area. Since the water flow generated by the washing process is carried out by the water flow, the water flow is not as strong as in the case of the conventional rotating blade method, so there is no over-washing and the appropriate degree of washing is achieved regardless of the amount of cloth used. It can be washed. These facts mean that the range of cloth amounts that can maintain an appropriate cleaning effect is wider than in the case of the prior art described above (see FIG. 3).

The dewatering operation in this embodiment is performed by, after draining water by opening the drain valve 16, activating a clutch mechanism (not shown) or the like to rotate the fixed tank 5 and the container-shaped stirring body 6 together at high speed in one direction. .

Note that the present invention is not limited to the above-mentioned embodiments, and may be applied to, for example, a washing machine that does not have a dehydrating function. Therefore, the peripheral wall of the fixed tank may be made non-porous to store water within itself. The configuration may be such that the pear water tank is removed, and other changes may be made as appropriate without departing from the scope of the invention.

[Effect of idea]

As is clear from the above, the washing machine of the present invention has a washing tub whose surrounding wall is composed of a fixed surrounding wall located above and a movable surrounding wall located below which is driven to rotate in forward and reverse directions. The laundry is stored together with water, and the laundry is washed by the synergistic effect of the frictional force of contact with the movable peripheral wall due to the forward and reverse rotation of the movable peripheral wall and the frictional force received from the fixed peripheral wall. characterized in that at least the inner surface of the movable peripheral wall portion is formed into a step-like shape whose diameter gradually increases from the bottom to the top, and a vertical rib is provided on the inner surface of the movable peripheral wall portion. and
As a result, it is possible to expect a stronger and more even cleaning effect than conventional ones without relying on conventional rotary blades or the rotation of the entire tank, and it is possible to wash a large amount at one time while maintaining an appropriate cleaning effect. It has various excellent effects such as a wider range of cloth weight, good moldability of the container-shaped stirring body, and sufficient strength.

[Brief explanation of the drawing]

FIG. 1 is an overall longitudinal sectional side view showing an embodiment of the present invention, FIG. 2 is an enlarged longitudinal sectional view of a part of a container-shaped stirring body, and FIG. 3 is a cleaning ratio characteristic diagram. In the figure, 2 is a water receiving tank, 4 is a washing tank, 5 is a fixed tank (fixed peripheral wall part), 6 is a container-shaped stirring body (movable peripheral wall part),
6a is a horizontal stage, 6b is a vertical stage, 9 is a vertical rib, 14 is a power control mechanism, and 15 is a motor.

Claims (1)

[Scope of utility model registration request] The peripheral wall of the washing tub is composed of a fixed peripheral wall located above and a movable peripheral wall located below and driven to rotate in forward and reverse directions, and the laundry is accommodated together with water in the washing tub, and the laundry is stored in the washing tub. Washing is carried out by a synergistic effect of the contact friction force with the movable circumferential wall part due to forward and reverse rotation of the movable circumferential wall part and the friction force received from the fixed circumferential wall part, wherein at least the inner surface of the movable circumferential wall part 1. A washing machine characterized in that the movable peripheral wall portion is formed into a step-like shape whose diameter gradually increases from the bottom to the top, and vertical ribs are provided on the inner surface of the movable peripheral wall portion.