JPH0671089A - Washing machine - Google Patents

Abstract

PURPOSE:To obtain a compact washing machine with a large capacity by expanding the content volume of a washing tub and increasing a washing capacity without changing the shape and dimensions of a main body through deforming the washing tub made of synthetic resin in the manner of projecting from inside to outside by physical force to expand the content volume while applying heated air to blue sidewall surface of the washing tub. CONSTITUTION:When heated air is blown from inside upon the walls of a washing tub 2 made of synthetic resin and the central parts of the tub walls are subjected to vacuum suction, the tub walls are deformed in the manner of projecting to outside. The washing tub 2 is built in an outer frame 1 and the content volume of the washing tub increases from V1 to V1+V1. Thus, the content volume of the washing tub and a washing capacity can be increased without changing the size of the main body of the washing machine. Further, it is possible to avoid the new installation of a size larger outer frame 1, washing tub 2, main body base 3, control panel 4, etc., so that a washing machine meeting the needs of the times for conserving natural resources can be obtained. Also, the rigidity of the washing tub is improved because a gap between the tub and outer frame is small.

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 synthetic resin washing tub, which contributes to resource saving by increasing the washing capacity without changing the outer dimensions of the main body, and has good cloth movement. Concerning the structure of the washing tub.

[0002]

2. Description of the Related Art Conventionally, in a washing machine incorporating a synthetic resin washing tub, for example, a two-tub washing machine, as shown in FIG. 1, a flange portion 2-a of the washing tub is provided above an upper end of an outer frame 1. It is generally constructed by hooking more and fixing the flange with screws. As a material of the washing tub, polypropylene is selected as a material that satisfies weather resistance, chemical resistance, and other properties required for a washing machine in a well-balanced manner, and this is injection-molded to form the washing tub.

In this construction, when a washing machine with a large washing capacity is to be made, a method of lowering the bottom of the tub to increase the amount of stored water can be considered. In practice, however, as shown in FIG. The tank bottom is restricted by the drive unit structure, and cannot be realized by sharing the main body base 3 with the lower tank bottom and before lowering it. In addition, even if the water level is increased to increase the amount of water stored, unless the height of the overflow port 5 is also increased, the wash water will overflow while stirring the clothes.
As a result, the water level will decrease. It is sufficient if the overflow height is set to allow for the increased amount of water when designing the main unit, but it is difficult to set it near the limit.

From the above, in order to increase the capacity, the outer frame 1, the washing tub 2, the main body base 3 and the control panel 4 which are slightly larger are newly provided. Now that the protection of the global environment and resource conservation are being screamed, making a washing machine with a large external size is a waste of resources in order to achieve a slight increase in capacity. On the other hand, from the customer's point of view, because of the housing situation in Japan, especially the housing situation in urban areas, the space for installing a washing machine is limited, and when it is dirty, it changes from the time of washing to the time of washing to change to laundry. Since the number of machines is increasing, the need for compact and large capacity washing machines is born.

As can be seen from FIG. 2, the washing tub 2 is simply suspended from the outer frame 1. A method of interposing packing 6 between the outer frame and the tank may be used in order to keep the rigidity in order to give a stirring effect by putting clothes of several tens of liters therein.

[0006]

According to the above conventional example,
In order to increase the washing capacity, it was necessary to change the external dimensions to make the washing machine one size larger, but the object of the present invention is to provide a washing machine that is compact and has a large capacity and can contribute to resource saving. It is in.

Also, by making the gap between the outer frame 1 and the side wall of the washing tub 2 small or in contact with each other, the problem of insufficient rigidity of the thin synthetic resin washing tub after being incorporated into the main body can be solved, and the cloth movement is smooth. The purpose is to provide a simple washing machine.

[0008]

In order to achieve the above object, the following solution is adopted. That is, by heating at least one side wall surface or a plurality of side wall surfaces of the washing tub from the inside to the outside with a physical force and deforming, the internal volume is expanded.

[0009]

For example, while blowing heated air to the side wall surface of the washing tub, the central portion of the wall surface is vacuum-sucked from the outside to be deformed, so that the side wall is projected outward, and the tub internal volume is changed from V before deformation to after deformation. The washing capacity can be increased by expanding to V ₁ + v ₁ .

In the structure in which the stirring blades are rotated at the bottom of the washing tub to stir clothes, the cloth movement is smooth and the good cleaning effect is obtained with the increase in volume v ₁ .

Usually, the value W ₁ / v ₁ (kg / l) obtained by dividing the washing capacity W ₁ by the amount V ₁ of water used is expressed by the term bath ratio, and is used as a measure of the performance of the washing machine. Expansion of tank volume (v
₁ ) to wash with the same melt ratio,

[0012]

[Equation 1]

Therefore,

[0014]

[Equation 2]

Only the washing volume can be increased.

Further, as shown in FIG. 3, the stirring blade 7 provided on the bottom of the washing tub 2 suspended from the outer frame 1 is driven by a drive motor 8 to a belt 9 and pulleys 10-a, 10-b. Although it is structured to be decelerated via the, the gap between the outer frame and the outer frame is made smaller, or the belt tension is reduced due to the impact of the washing tub being displaced due to impact during transportation. Can be avoided.

[0017]

Embodiments of the present invention will be described below with reference to FIGS. As shown in FIG. 3, heated air 11 is blown from the inside of the synthetic resin washing tub 2 tub wall, and the central portion of the tub wall is vacuum-sucked 12 so that it bulges outward and deforms. The washing tub 2 is incorporated in the outer frame 1 as shown in FIG. The washing tub internal volume increases from V ₁ to V ₁ + v ₁ .

According to this embodiment, the inner volume of the washing tub can be increased without changing the size of the washing machine body, and the washing capacity can be increased. In addition, the outer frame 1, the washing tub 2, the main body base 3, the control panel 4, etc., which are slightly larger, can be avoided from being newly installed, and the washing machine can meet the needs of the age of resource saving.

Further, the gap between the tub and the outer frame is small, which contributes to the improvement of the rigidity of the washing tub and the belt 9 which transfers the driving force due to the displacement of the washing tub due to the impact during transportation.
It also has an effect of being able to solve the problem that the tension of the wire decreases and good transmission is not performed. FIG. 5 shows that the washing tub 2 is deformed by projecting from the inside to the outside by applying hydraulic pressure or other mechanical force 13 while applying heated air 11 from the inside.

FIG. 6 shows that the washing tub 2 is injection-molded and then straightened by the rectifier 1.
4 is inserted, the central portion of the side wall surface is projected from the inner side to the outer side, and is left at a high temperature to be deformed so that a predetermined shape can be obtained.

In either case of FIGS. 5 and 6, the same effect as that of FIG. 3 can be obtained.

[0022]

According to the present invention, it is possible to obtain a washing machine suitable for increasing the washing capacity by enlarging the internal volume of the washing tub and making it compact and having a large capacity, that is, resource saving.

Further, the rigidity of the washing tub made of synthetic resin is improved, and good cloth movement and washing effect can be obtained.

Even with the progress of nuclear families, the amount of laundry tends to increase due to the abundance of clothes, the improved feeling of cleanliness, and the immediate washing of clothes worn for one day. This is where large capacity is required. On the other hand, due to the housing situation in Japan, which does not have a sufficiently large laundry room, it is essential to make the washing machine compact. There is a need for a washing machine that is compact, has a large capacity, and can contribute to resource saving. According to the present invention, it is possible to provide a suitable washing machine that matches the above-mentioned historical background.

[Brief description of drawings]

FIG. 1 is an external perspective view showing the configuration of a washing machine.

FIG. 2 is a sectional view of a conventional washing machine.

FIG. 3 is a view showing that the washing tub according to one embodiment of the present invention is projected outward and deformed.

FIG. 4 is a cross-sectional view of a washing machine showing an enlarged volume of a washing tub according to the present invention.

FIG. 5 is a view showing a method of deforming a washing tub showing another embodiment according to the present invention.

FIG. 6 is a diagram which similarly shows a modification method.

[Explanation of symbols]

1 ... Outer frame, 2 ... Washing tub, 3 ... Base, 4 ... Control panel, 11 ... Heating air, 12 ... Vacuum suction, 13 ... Mechanical power, 14 ... Correcting work.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshimi Okamoto 1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Taga factory

Claims (1)

[Claims] 1. A washing machine made of injection-molded synthetic resin, wherein a side wall surface of the washing tub is heated and is stretched from the inside to the outside by a physical force to be deformed.