JPH0256920B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a washing tub that is improved so that it can be used in common with any of two blades having different diameters.

[Technical background of the invention and its problems]

In washing machines, the blades are generally disposed in circular recesses formed in the inner bottom of the washing tub. On the other hand, in the case of washing machines, whirlpool-type washing machines have conventionally been mainstream, but recently, agitation-type washing machines have also been provided for the purpose of preventing cloth from getting tangled.

However, while the blades used in whirlpool washing machines (called pulsators) have a relatively small diameter, the blades used in agitator washing machines (called agitators) have a large diameter. Therefore, the size of the recess at the bottom of the washing tub had to be changed between the spiral type and the agitation type, and a dedicated washing tub was required for each type.

[Object of the Invention] Therefore, an object of the invention is to provide a washing tub that can be commonly used for blades of different sizes.

[Summary of the invention]

The present invention provides a large-diameter circular first portion at the inner bottom of the washing tub.
A recessed portion is provided, and a second circular recessed portion with a small diameter is provided within this first recessed portion, and one of two blades having different large and small diameters is placed in accordance with the size of the blade in the recessed portion. Even when large-sized blades are disposed selectively in one of the recesses and the first recess is formed lower than the peripheral wall of the second recess, the washing capacity is reduced. The aim is to prevent this as much as possible.

[Embodiments of the invention]

An embodiment in which the present invention is applied to a dehydrating and washing machine will be described below with reference to FIGS. 1 to 4.
First, in Fig. 1, 1 is an outer tank supported by a hanging rod 3 in an outer box 2, and 4 is an inner tank that serves both as a washing tub and a dehydration tank. As shown in the figure, a housing 5 is fixed, and a dewatering shaft 6 connected to the center of the outer bottom of the inner tank 4 is inserted into and supported by the housing 5, and a washing shaft 7 is inserted into the dehydrating shaft 6.
is supported for insertion. And although not shown,
A motor is disposed at the outer bottom of the outer tank 1, and the rotation of this motor is selectively transmitted to the dewatering shaft 6 and the washing shaft 7 via a clutch mechanism. Next, the structure of the inner tank 4 will be explained based on FIGS. 2 and 3.
The inner tank 4 is made of plastic,
A circular first recess 8 with a large diameter is formed concentrically with the washing shaft 7 at the inner bottom thereof, and this first recess 8
A second circular recess 9 with a small diameter is formed concentrically with the washing shaft 7 inside. Then, in order to make the first recess 8 lower than the peripheral wall 9a of the second recess 9,
The bottom of the recess 8 is formed in a tapered shape that slopes downwardly outward from the upper end of the peripheral wall 9a of the second recess 9. It is connected to the peripheral wall 8c of the recess 8. Note that the bottom of the second recess 9 is open,
This opening is closed by a bottom plate 10 to which a dewatering shaft 6 is connected.

FIG. 2 shows the state in which the inner tank 4 is used in a whirlpool-type dehydrating and washing machine, and 11 is a pulsator as a blade.
is arranged in the second recess 9 and directly connected to the washing shaft 7 by a screw 12. In the configuration shown in FIG. 2, when the motor rotates in the forward and reverse directions at predetermined intervals, the pulsator 1 rotates in the forward and reverse directions at a relatively high speed to generate a so-called reverse spiral water flow to wash the laundry.

Next, FIG. 4 shows a state in which the inner tank 4 is used in an agitation-type dehydrating/washing machine. In FIG. For example, a planetary gear mechanism (not shown) is installed inside the washing shaft 7.
The function is to reduce the rotation speed and transmit it to the output shaft 15. Reference numeral 16 designates a large-diameter agitator as a blade, which has a circular base 16a that slopes downwardly toward the outside and has a tower-shaped protuberance 16b protruding from the center of the circular base 16a.
An annular rib 16c is provided on the outer peripheral edge of 6a to protrude downward. The agitator 16 is disposed within the second recess 9 so that the circular rib 16c on the peripheral edge thereof is fitted into the second recess 9, and is directly connected to the output shaft 15 of the gear unit 13 by a screw 17. In the configuration shown in FIG. 3, when the motor rotates forward and reverse at predetermined time intervals, the rotation is decelerated by the gear unit 13 and transmitted to the agitator 16, and the agitator 16 rotates forward and reverse at a relatively low speed at predetermined time intervals. Generates a stirring water flow that reverses forward and reverse,
wash the laundry.

By the way, when two recesses with different diameters are provided in the inner bottom of the inner tank, as shown in FIG. It is conceivable to form a second recess C with a smaller diameter at the bottom of B. However, in this case, the first recess B is one step higher than the second recess C, so if the agitator D is placed in the first recess B, the pulsator E is placed in the second recess C. Since agitator D is located at a higher level compared to , the capacity in inner tank A that can be used for washing is reduced, so even if the same inner tank A is used, if agitator D is used, the washing capacity will be This causes the problem that the amount of energy decreases. However, according to the present invention, the first recess 8 is replaced by the second recess 9.
Since it is formed lower than the peripheral wall 9a of the pulsator 11 arranged in the second recess 9, even if the agitator 16 is arranged in the first recess 8, its height level is lower than that of the pulsator 11 arranged in the second recess 9.
Therefore, compared to the one shown in FIG. 5, the agitator 16 can be provided at a lower position, and a decrease in washing capacity can be prevented as much as possible.

Note that the entire inner bottom of the first recess may be formed flat, and an annular rib may be provided protruding from the bottom of the first recess, and the inner side of the rib may be used as the second recess. In addition, the present invention is applicable not only to the inner tub of a washing machine that also serves as a dehydrator.
It may be applied to the washing tub of a two-tub washing machine.

〔Effect of the invention〕

As explained above, the present invention provides a first recess with a large diameter in the inner bottom of the washing tub, and a second recess with a small diameter in the first recess, and one of the two large and small blades. Since either of the two recesses is selectively placed in one of the recesses depending on the size of the blade, one washing tub can be used in common for both blades of different sizes. There is no need to form a dedicated washing tub for each blade, and costs can be reduced. Furthermore, since the first recess is formed lower than the circumferential wall of the second recess, the large-diameter blades can be disposed at approximately the same height as the small-diameter blades, and a decrease in washing capacity can be prevented as much as possible.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention,
Figure 1 is a partially cutaway side view of the dehydrating/washing machine, Figure 2 is an enlarged sectional view of the main parts when configured as a spiral type, Figure 3 is a cross-sectional view of the inner tub, and Figure 4 is a cross-sectional view of the inner tub.
The figure is an enlarged vertical cross-sectional view of the main parts when constructed as a stirring type, and FIG. 5 is a vertical cross-sectional view of the inner tank illustrated for explaining the effects of the present invention. In the figure, 4 is an inner tank (washing tub), 8 is a first recess,
9 is a second recess, 9a is a peripheral wall of the second recess, 11
is a pulsator (blade), 16 is an agitator (blade)
It is.

Claims (1)

[Claims] 1. A first recess with a large diameter is provided in the inner bottom, and a second recess with a small diameter is provided within the first recess, and the first recess is separated from the peripheral wall of the second recess. The washing tub is formed to have a low height, and one of two blades having different diameters is selectively disposed in one of the two recesses according to the size of the blade.