JPH0226468Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a washing tub designed 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 a two-tub washing machine, the blades are generally disposed in a circular recess formed in the inner bottom of the washing tub. On the other hand, in two-tub type washing machines, the spiral type has conventionally been the mainstream, but recently, agitation type types have also been provided for the purpose of preventing cloth from getting tangled.

However, while the blades (called pulsators) used in whirlpool-type two-tub washing machines have a relatively small diameter, the blades (called agitators) used in agitator-type two-tub washing machines have a relatively small diameter. The diameter of the washing tub is large, and therefore the size of the recess at the bottom of the washing tub must be changed between the swirling type and the agitation type, and each requires its own washing tub.

[Purpose of invention]

Therefore, it is an object of the present invention to provide a washing tub that can be used commonly for blades of different sizes.

[Summary of the idea]

In the present invention, the inner bottom of a tank body having a rectangular planar shape that is fixedly disposed inside an outer box is recessed almost entirely except for the peripheral portion of the inner bottom so that the inner bottom is concentric with the center of the inner bottom of the tank body. A first recessed portion having a large diameter is formed in the inner bottom of the first recessed portion at a position eccentric from the center of the tank main body and at an appropriate corner of each corner of the tank main body. A second circular recess with a small diameter is depressed at a position closer to the center, and one of the two blades with different diameters is inserted into one of the two recesses according to the size of the blade. The feature is that it is selectively arranged in the

[Example of idea]

An embodiment of the present invention will be described below based on the drawings. First, the specific structure of the washing tub will be explained with reference to FIG. That is, the tub body 1 of the washing tub is formed by integral molding of plastic together with the dewatering tank 2.
Its planar shape is rectangular as shown in FIG. By recessing the inner bottom of the tank body 1 in its entirety except for the peripheral portion, the tank body 1
A circular first recess 3 with a large diameter is formed, which is concentric with the center of the
As shown in the figure, a circular second recess 4 with a small diameter is located at a position offset from the center of the first recess 3 by a predetermined amount toward the front right side and closer to one corner of the front right side of the tank body 1.
is forming a depression. The bottom of the second recess 4 is inclined, and a bearing body 6 is inserted into a hole 5 formed in the center thereof and is fastened and fixed with a nut 7. Further, a boss portion 8 is integrally formed at the bottom of the first and second recesses 3 and 4.

FIG. 1 shows the tub main body 1 used in a two-tub washing machine of the whirlpool type. Reference numeral 10 denotes a pulsator shaft inserted through and supported by the bearing body 6, and a driven pulley 15 connected via a belt 14 to a drive pulley 13 of a motor 12 disposed on a base 11 is attached to the lower end of the pulsator shaft. ing. 1
Reference numeral 6 denotes a relatively small-diameter pulsator as a blade, which is tightened and fixed to the upper end of the pulsator shaft 10 with a screw 17, and is inserted into the second recess 4 at the inner bottom of the tank body 1.
It is located in Reference numeral 18 denotes a circular cover having approximately the same size as the first recess 3, which is formed into a concave shape that follows the inner bottom surface of the first recess 3, and has a second recess 4 at a predetermined location. A circular hole 19 corresponding to the outer peripheral edge and the circular hole 1 is formed as an opening.
Ribs 18a and 18b having the same height as the depth of the first recess 3 are bent downward on the inner peripheral edge of the first recess 3. The cover 18 is fitted into the first recess 3 and fixed by a self-tapping screw 20 screwed onto the boss 8. When the cover 18 is in the fixed state, the outer peripheral surface of the pulsator 16 is surrounded by the rib 18b of the circular hole 19 with a small gap therebetween.

In the above configuration, when the motor 12 rotates in the forward and reverse directions at predetermined time intervals, the pulsator 16 accordingly rotates in the forward and reverse directions at a relatively high speed at predetermined time intervals to generate a so-called reverse spiral water flow to wash the laundry.

In this case, since the second recess 4 is provided at an eccentric position with respect to the inner bottom of the tank body 1, the second recess 4
The water flow generated by the pulsator 16 disposed in the recess 4 is not a simple eddy water flow, but a complex water flow including a strong water flow in the vertical direction along the inner surface of the tank body 1 on the side where the pulsator 16 is eccentrically arranged. This improves the washing effect.

Moreover, since the second recess 4 is eccentrically located near one corner of the tank body 1, the pulsator 16
A relatively large gap is created between the tank body 1 and the inner circumferential wall surface of the tank body 1. On the other hand, assuming that the second recess 16 is provided at an eccentric position near the middle of the two corners of the tank body 1, the gap between the pulsator 16 and the inner circumferential wall of the tank body 1 is small. In the case of the pulsator 16 that generates a strong whirlpool water flow, the movement of the laundry that needs to be stirred around the pulsator 16 by riding on the water flow is obstructed by the inner circumferential wall of the tub body 1. This causes a problem of impairing the washing effect. However, in this embodiment, as described above, a relatively large gap is created between the pulsator 16 and the inner circumferential wall of the tub body 1, so that the laundry can be stirred smoothly and a high washing effect can be obtained.

Next, FIG. 3 shows the state in which the tub body 1 is used in an agitation type two-tub washing machine, and the same parts in FIG. 3 as in FIG. 1 are given the same reference numerals for explanation.
A shaft 21 is inserted through and supported by the bearing body 6, and a pin 22 is pierced through the upper end of the shaft. 23
is a gear unit, which connects the bottom case 24 and the lid case 25 with a gasket 26 as shown in FIG.
An internal gear 29 integrated with an agitator shaft 28 is housed in a gear case 27 that is watertightly connected through a gear case 27, and a small gear 30 that meshes with the internal gear 29 is housed. There is. In this case, the agitator shaft 28 is supported by bearings 31 fitted in both the bottom and lid cases 24 and 25, respectively, and the pinion 30 is supported by a boss cylinder 30a protruding from itself on the bottom case 24. The boss cylinder 30a is held by fitting into a cylinder mouth part 24a formed obliquely corresponding to the boss cylinder 30a, and a plurality of engagement grooves 32 that widen toward the end are formed in the boss cylinder 30a. The gear unit 23 having such a structure is housed in the first recess 3 at the inner bottom of the tank body 1, and is fixed by a self-tapping screw 33 screwed into the boss 8. In the process of storing and arranging the gear unit 23, the upper end of the shaft 21 is connected to the small gear 30.
The pin 22 is fitted into the boss tube 30a of the shaft 21 and engages with the engagement groove 32, thereby enabling rotation transmission from the shaft 21 to the small gear 30. still,
34 is the bearing body 6 and the cylinder opening 24a of the bottom case 24.
It is a seal that seals the gap between the two. Reference numeral 35 designates a large-diameter agitator as a blade that integrally has a tower-shaped raised portion 35a in the center, and this is connected to the agitator shaft 28.
It is fixed to the upper end of the tank body 1 by a screw 36.
It is arranged in the first recess 3 in the inner bottom. In this state, the outer peripheral surface of the lower end of the agitator 35 is surrounded by a gap smaller than the inner peripheral surface of the first recess 3, and the gear unit 23 is hidden by the agitator 35.

In the above configuration, when the motor 12 rotates in forward and reverse directions at predetermined intervals, the rotation is transmitted from the shaft 21 to the agitator 35 after being decelerated by the small gear 30 and the internal gear 29 . Therefore, agitator 3
5 rotates forward and backward at a relatively low speed to generate an agitating water stream that reverses at predetermined intervals to wash the laundry.

In this case, since the first recess 3 is provided concentrically with the center of the tank body 1, it rotates forward and backward at a relatively low speed and does not generate a very strong water flow, so it is preferable to arrange it concentrically with the tank body 1. The agitator 35, which is said to be preferable, can be provided at a preferable position, and a good washing effect can be obtained.

By the way, in the above embodiment, when the pulsator 16 is disposed, the cover 18 is provided.
By surrounding the outer circumference of the lower end of the pulsator 16 with a small gap, the cover 18 prevents laundry from being caught between the outer circumference of the lower end of the pulsator 16 and the inner circumferential surface of the first recess 3 having a large diameter. This is to prevent this from happening. However, the first recess 3
is formed by recessing almost the entire inner bottom of the tank body 1, except for the peripheral edge thereof, and has a fairly large diameter. On the other hand, since the second recess 4 is located within the first recess 3 and has a small diameter of about half that of the first recess 3, the pulsator can be used without providing the cover 18. When the pulsator 16 is disposed in the second recess 4, the inner bottom surface of the first recess 3 has a large extent and functions as the inner bottom surface of the tank body 1 itself, and the pulsator 16 and the first recess 3 The gap created between the inner circumferential surface and the inner circumferential surface of the
Therefore, when the pulsator 16 is provided, the laundry will not be caught between the pulsator 16 and the inner peripheral surface of the first recess 3 even if the cover 18 is not provided, and the cover 18 can be omitted. This makes it possible to reduce costs. Incidentally, when the cover 18 is omitted, the lower end of the pulsator 16 is fitted into the second recess 4 with a slight gap, and thereby the outer periphery of the lower end of the pulsator 16 is and second recess 4
This can prevent laundry from being caught between the

[Effect of idea]

As explained above, the present invention is based on the inner bottom of the tank body, which is fixedly arranged inside the outer box and has a rectangular planar shape.
Substantially the entirety of the inner bottom except for the peripheral edge portion is depressed to form a circular first recess with a large diameter concentrically with the center of the inner bottom of the tank body, and among the inner bottom of the first recess, A second circular recess with a small diameter is recessed at a position eccentric from the center of the tank body and close to a suitable corner of each corner of the tank body, and two large and small blades are formed. Since one of the two recesses is selectively disposed in one of the two recesses depending on the size of the blade, one washing tub can be used in common for both blades of different sizes. can be used. Therefore, there is no need to form a dedicated washing tub for each blade, and costs can be reduced. Furthermore, since the first recess has a considerably larger diameter than the second recess, when a blade with a smaller diameter is provided in the second recess, it is not necessary to provide a cover in the first recess. The laundry is not caught between the small-diameter blade and the inner circumferential surface of the first recess, and therefore there is no need to provide a cover, and costs can be reduced.

Moreover, since the first recess with a large diameter is provided concentrically with the tank body, and the second recess with a small diameter is provided at an eccentric position, the large diameter blade and the small diameter blade are preferable for each. In addition, the second recess, which has a particularly small diameter, is located at one part of the rectangular tank body.
Since they are eccentrically located near the corners, there is no risk of creating a relatively large gap between the small-diameter blades and the inner circumferential surface of the tub body, which will impede the flow of laundry, allowing for good washing. effect can be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional front view showing a washing tub applied to a whirlpool type washing machine, Fig. 2 is a transverse plan view taken along the line - in Fig. 1, and Fig.
The figure is a longitudinal sectional front view showing the washing tub applied to an agitation type washing machine, FIG. 4 is an enlarged longitudinal sectional view of the gear unit, and FIG. 5 is an enlarged perspective view of the small gear. In the figure, 1 is the tank body, 3 is the first recess, and 4 is the second
16 is a pulsator (blade), 23 is a gear unit, and 35 is an agitator (blade).

Claims (1)

[Scope of utility model registration request] The inner bottom of the tank main body, which has a rectangular planar shape and is fixedly disposed inside the outer box, is recessed almost entirely except for the peripheral edge of the inner bottom, and has a large diameter concentrically with the center of the inner bottom of the tank main body. A circular first recess is formed, and the inner bottom of the first recess is located at a position eccentric from the center of the tank main body and close to an appropriate corner of each corner of the tank main body. A second circular recess with a small diameter is recessed in the position, and one of the two blades having different diameters is selectively placed in one of the two recesses according to the size of the blade. A washing tub that is arranged in such a way that it