JPS6168092A - Washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of the Invention] The present invention consists of a peripheral wall of a washing tub consisting of a fixed peripheral wall part and a movable peripheral wall part, and mainly improves the relationship between the two walls and the laundry. This invention relates to a washing machine that obtains a cleaning action through contact.

[Technical background of the invention and its problems]

Among conventional WI washing machines, those with rotating blades that generate a water flow using rotating blades to achieve the cleaning effect require a large washing tank volume relative to the futon because the essence is to make the laundry flow with the water current. , which means that the amount that can be washed in - times is small. Also, when there are few futons, the water flow becomes extremely strong (and tends to over-wash), while when the number of futons increases, the water flow rate decreases and the cleaning effect tends to decrease rapidly. Since the contact with the blade occurs only incidentally and only partially, it is not possible to expect a scrubbing effect over the entire laundry, and on the contrary, the laundry may be partially damaged.

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 reduced 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 the invention]

Therefore, the purpose of the present invention is to be able to expect a higher cleaning effect than conventional methods and to prevent fabric from fading in one cycle without using the conventional rotary blades or the rotation of the entire washing tank. To provide a washing machine which can maintain its effectiveness and can cover a wide range of cloth mounds.

(Summary of the Invention) The present invention has the peripheral wall of a washing tub formed by a square tubular fixed surrounding wall portion located above and a cylindrical movable surrounding wall portion located below, and the laundry is placed in the washing tub. is accommodated together with water and the movable peripheral wall is rotated in forward and reverse directions, so that the laundry is made to flow mainly due to the frictional force of contact with the movable peripheral wall, and the frictional force received from the fixed peripheral wall in the upper part is Washing is carried out by a synergistic action, and as a result, the scrubbing effect due to friction between the fixed peripheral wall part and the movable peripheral wall part of the laundry and the friction between the laundry items, and the difference in the laundry from the fixed peripheral wall part and the movable peripheral wall part are achieved. It is possible to expect a so-called massaging effect due to the fact that the material is rubbed even when subjected to a directional force.

[Embodiments of the invention]

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

Reference numeral 1 indicates an outer box fixed on the base 2, and 3 indicates a washing tank disposed inside the outer box 1. This washing tank 3 essentially has its peripheral wall divided into a fixed peripheral wall part and a fixed peripheral wall part. In this embodiment, this is achieved by a combination of a fixed tank 4 fixed to the outer box 1 and an agitator 5 in the form of a shallow container. There is. To explain this in detail below, the fixed tank 4 has an upper half formed in the shape of a square cylinder, and a lower half formed in the shape of a bottomed cylinder with a diameter that is approximately inscribed in the square cylinder wall 4a. The cylindrical wall 4b and the upper rectangular cylindrical wall 4a are connected by a tapered wall portion 4C.

The fixed tank 4 is a dewatering tank (not shown) that has a dewatering capacity.
The flange 5 at the upper end is placed on the upper end of the outer box 1 and fixed with screws or the like. Then, the container-shaped stirring body 5 is placed in the lower part of the fixed tank 4, that is, in the cylindrical wall 4b, and its bottom is connected to the bearing M at the bottom of the fixed tank 4.
It is connected to the washing shaft 7 supported by 46. At this time,
The height of the circumferential wall of the container-shaped stirring body 5 is set to be slightly smaller than the height of the circumferential wall of the cylindrical wall 4b of the fixed tank 4, i.e., the depth, and the diameter is set to a size within a range in which it can rotate within the cylindrical wall 4b. The container-shaped stirring body 5 is made of plastic, and protrusions 5a and 5b having different heights and lengths are formed on its inner bottom and inner peripheral surface in order to improve the stirring performance for water or cloth. Reference numeral 8 denotes a washing motor disposed on the base 2, and a driven pulley 9 directly connected to the washing motor and a driving pulley 10 directly connected to the washing shaft 7 are connected by a belt 11. 12 is a drain valve,
The water in the washing tank 3 can be discharged from the bottom of the fixed tank 4 to the outside of the machine via a drainage hose 13.

In the above configuration, the washing operation is performed by rotating the container-shaped stirring body 5 in forward and reverse directions by the washing motor 8.
The rectangular cylindrical wall 4a of the fixed tank 4 exposed upward from the peripheral wall of the washing tank 3 is made to function as a fixed peripheral wall part of the peripheral wall of the washing tank 3, and the peripheral wall of the container-shaped stirring body 5 is made to function as a movable peripheral wall part. .

Next, the operation of the above configuration will be explained. During washing, approximately the same amount of water as in the case of the conventional rotary blade type washing Bla is supplied into the washing tank 3, and the laundry is thrown into the washing tank 3. The washing operation is performed by driving the container-shaped agitator 5 to rotate in forward and reverse directions by the washing motor 8.

In this embodiment, the rotation speed of the container-shaped stirring body 5 is within the range of 120 to 180 revolutions per minute, and the direction of rotation is reversed approximately every 2 to 3 revolutions.

In such a washing operation, since the laundry comes into contact with the circumferential wall of the container-shaped agitator 5 and the rectangular tube wall 4a, a rotational force is applied from the container-shaped agitator 5 to the lower part due to rubbing contact with this. The upper part receives a restraining force due to frictional contact with the square cylinder wall 4a, and by simultaneously receiving such frictional forces in different directions, it gives a twisting or compressing effect to the laundry, and this is caused by reversal of the rotational direction of the container-shaped agitator 5. This is repeated and the laundry is pushed toward the circumferential wall of the container-like agitator 5 by the centrifugal force accompanying the rotation of the container-like agitator 5, and the reaction is received inward from the upper rectangular cylinder wall 4a. This also produces an action of reversing ten times, giving a complex motion. Historically, the four corners of the rectangular tube wall 4a protrude outward from the peripheral wall of the container-shaped agitator 5, so when the laundry moves upward from the container-shaped agitator 5 to the rectangular tube 14a, the The movement of the laundry changes from when it was downward,
Moreover, the peripheral wall of the rectangular tube wall 4a extends toward the corner of the container-shaped stirring body 5.
Therefore, when the laundry rotates in the circumferential direction along the rectangular tube wall 4a and moves toward the corner, the ffI received from the rectangular tube wall 4a is The force gradually decreases, and conversely, when moving away from the corner, the frictional force received from the square tube wall 4a gradually increases, and in this way, the laundry moves upward into the square tube wall 4a. Due to the change in movement when moving to the center and the change in frictional force when moving in the circumferential direction along the rectangular tube wall 4a, the laundry becomes even softer. ! Produces rough movements. Therefore, while the laundry is subjected to scrubbing action due to large friction between the cloths due to such complicated movements and large friction with the -1 square cylindrical wall 4a and the peripheral wall of the container-shaped agitator 5, it is also subjected to scrubbing action due to repeated twisting and compression. The cleaning effect is shown in FIG. 3 as an example of the results of a comparative experiment. In FIG. B shows the cleaning ratio characteristics when using the conventional rotating blade system, and C shows the cleaning ratio characteristics when using the washing tank rotating system that was considered prior to the present invention, and it can be seen that the cleaning performance according to the present invention is superior.

Furthermore, as mentioned above, the laundry is separated by the rectangular tube wall 4a and the container shape Fft.
Since it is moved by frictional contact with the peripheral wall of the agitator 5, as the amount of cloth increases, the frictional force also increases, and the degree of movement of the laundry does not decrease as the amount of cloth increases, so the rate of decrease in the cleaning effect is small. Moreover, when the amount of laundry is small, the frequency of contact with the peripheral wall of the container-shaped agitator 5 is low, and the contact friction force is extremely small, which is caused mainly by the low-speed rotation of the container-shaped agitator 5, which occurs almost entirely in the fixed tank 4. Since the water flow is washed by the water flow, the water flow does not become extremely strong as in the conventional rotating blade method, so there is no excessive cleaning and an appropriate degree of cleaning can be ensured regardless of the size of the cloth. . These mean that the range of placements in which an adequate cleaning effect can be maintained is wider than in the prior art described above (see FIG. 3).

In addition, since the upper half of the fixing tank 4 is made of a square cylindrical wall 4a, the fixing [
The inner volume of the washing tank 3 is larger than that of a washing tank 4 having a cylindrical shape as a whole, and more laundry items m can be washed at one time.

In other words, the fact that the upper half of the fixed tank 4 is made of the square cylindrical wall 4a is because it matches the square outer box 1 in shape.
This means that the unnecessary space created between the outer box 1 and the fixing tank 4 is minimized, thereby increasing the internal volume of the washer 13 and the number of washable containers that can be washed at one time. As described above, even if the number of clothes is increased, the rate of decrease in the cleaning effect is small, so even if the amount of laundry to be washed in one cycle is large, a good cleaning effect can be obtained.

Note that the present invention is not limited to the embodiments described above and shown in the drawings; for example, the square tube 14a is made rectangular, and the cylindrical wall 4b and therefore the container-shaped stirring body 5 are provided eccentrically with respect to the square tube wall 4a. Various modifications are possible, such as making the movement of the laundry more complicated.

(Effects of the Invention) As explained above, according to the present invention, the laundry mainly comes into contact with the fixed peripheral wall portion and the movable peripheral wall portion, and is pushed by the synergistic effect of the respective frictional forces. The necessary movement can be ensured even with a large amount of cloth, and therefore, if the volume of the washing tank is the same, far more laundry can be washed in one wash than with conventional methods, and moreover, it can be expected to have a greater cleaning effect than conventional methods. Moreover, there is little damage to the fabric and there is a wide range of fabrics that can maintain an appropriate cleaning effect, so it is possible to avoid excess or deficiency in the cleaning effect of the futon.

Furthermore, according to the present invention, since the fixed peripheral wall is formed into a rectangular tube shape, unnecessary space between the washing tank and the outer box in which the washing tank is disposed can be saved. As a result, the internal volume of the washing tank can be increased accordingly, resulting in excellent effects such as increasing the amount of laundry that can be washed at one time.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG.
2 is a plan view, and FIG. 3 is a cleaning ratio characteristic curve diagram. In the figure, 3 is a washing tank, 4 is a fixed tank, and 5 is a container-shaped stirring body. Applicant Toshiba Corporation Figure 1 d Clause 2

Claims (1)

[Claims] 1. The peripheral wall of the washing tank is composed of a fixed peripheral wall located above and a movable peripheral wall located below that is driven to rotate in forward and reverse directions, and the laundry is stored together with water in the washing tank and the laundry is washed. is made to flow mainly due to the frictional force of contact with the movable peripheral wall part, and is washed by a synergistic effect with the frictional contact force received from the fixed peripheral wall part in the upper part, the movable peripheral wall part A washing machine characterized in that the portion is formed in a cylindrical shape, and the fixed peripheral wall portion is formed in a rectangular tube shape.