JPH0133020Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention relates to a washing machine in which a small-diameter pulsator is provided in a recess formed in the inner bottom of a washing tub to accommodate a large-diameter agitator. .

[Technical background of the invention]

BACKGROUND ART Conventionally, for example, in a two-tub washing machine, a so-called spiral structure in which a relatively small diameter pulsator is disposed at an eccentric position at the bottom of the washing tub has been common. However, in recent years, in order to improve cleaning performance, a so-called agitating type structure in which a large diameter agitating body called an agitator is provided approximately at the center of the washing tank has been provided. Therefore, in order to reduce costs by using a common mold between the spiral type and stirring type, the following configuration has been considered. That is, a recess that can accommodate a large-diameter agitator is formed in the inner bottom of the washing tub, and an insertion hole for inserting the washing shaft is selectively formed in the center or eccentric position of the recess by replacing the mold nest. When configured as an agitating type, a washing tub with an insertion hole formed in the center of the recess is used, and a large-diameter agitator is attached to the upper end of the washing shaft inserted into the insertion hole. On the other hand, in the case of a spiral type configuration, a washing tub with an insertion hole formed at an eccentric position in the recess is used, and a small diameter pulsator is attached to the upper end of the washing shaft inserted through the insertion hole. At the same time, a horizontal flat cover connected to the inner bottom surface of the washing tub is attached to a portion of the recess around the pulsator. In this case, since the recess is formed to match the large-diameter stirring body, the bottom surface of the recess is horizontal, and therefore, in the spiral type configured as described above, the pulsator is arranged horizontally.

[Problems with background technology]

However, in the spiral type washing machine configured as described above, the pulsator is arranged horizontally, and the cover attached to the peripheral part of the pulsator in the recess forms a horizontal flat surface that extends to the inner bottom surface of the washing tub. Therefore, the water flow generated by the rotation of the pulsator during the washing operation becomes a simple whirlpool water flow along the horizontal plane, which has the disadvantage that the ability to turn the laundry is low and the washing performance is poor.

[Purpose of invention]

This invention was made in consideration of the above circumstances,
Therefore, the purpose of this is to provide a washing tub in which an insertion hole for inserting a washing shaft is selectively formed in the center or eccentric position of the recess in the inner bottom by inserting the mold and replacing the insertion hole with the insertion hole in the eccentric position of the recess. To provide a washing machine which can improve washing performance even if it is equipped with a formed washing tub.

[Summary of the idea]

The present invention provides a small-diameter pulsator on a washing shaft located eccentrically in a recess at the inner bottom of the washing tub, a cover in a space surrounding the pulsator in the recess in the washing tub, and a cover that is attached to the axial center of the pulsator. By setting the shape to be inclined downwardly toward the outer circumferential side from the center, the flow flows into the washing tub in a downwardly inclined manner toward the outer circumferential side along the cover, and also changes its direction upward upon colliding with the periphery of the inner bottom of the washing tub. It generates a water stream and uses this water stream to turn the laundry upside down.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 1 is an outer box, and 2 is a washing tub disposed inside the outer box 1, which is integrally molded from plastic using a mold (not shown), and the inner bottom of the tub is recessed except for the periphery. As a result, a circular recess 3 with a large diameter is formed, and this recess 3
The insertion hole 4 is formed at an eccentric position by the nest of the mold.
(See Figure 2) is formed. Reference numeral 5 denotes a bearing cylinder inserted and fixed into the insertion hole 4 of the recess 3, and a washing shaft 6 is rotatably supported by this bearing cylinder. A driven pulley 7 is fitted to the lower end of the washing shaft 6, and a belt 10 is stretched between the driven pulley 7 and a drive pulley 9 of a motor 8 disposed at the bottom of the outer box 2.
In this embodiment, the motor 8 is intermittently rotated in forward and reverse directions by an operation control device (not shown). 11 is a washing shaft 6 protruding into the recess 3
A small diameter pulsator attached to the upper end, 12 is a circular cover having approximately the same size as the recess 3,
A circular opening 12a is formed at the eccentric position of this, corresponding to the pulsator 11, and this opening 12a
has an annular wall 12b having a depth approximately equal to the depth of the recess 3.
is formed downward. The cover 12 is fixed in the recess 3 with the lower end of the pulsator 11 housed in the opening 12a, and thus covers the space around the pulsator 11 in the recess 3. Thus, the cover 12 and the pulsator 11 are shaped to be inclined downwardly toward the outer periphery around the axis of the pulsator 11.

Next, the operation of the above configuration will be explained. After putting water, laundry, and detergent into the washing tub 2, the motor 8
When energized, the pulsator 11 is driven by the motor 8 and rotates forward and backward intermittently. By this rotation of the pulsator 11, water between the blades on the upper surface of the pulsator 11 is mainly sent out horizontally outward. However, since the cover 12, which is located around the pulsator 11 and constitutes the inner bottom surface of the washing tub 2, has a shape that slopes downward toward the outer circumferential side with the axis of the pulsator 11 as the center, the pulsator is Water sent horizontally outward from cover 1
The water flows downwardly along the upper surface of the washing tub 2, collides with the inner bottom periphery of the washing tub 2, and heads upward along the inner circumferential wall of the washing tub 2. As a result, a water flow is generated in the washing tub 2 as shown by arrow A in FIG. It becomes like this. As a result, the laundry present in the vicinity of the inner bottom of the washing tub 2 is washed down along the cover 12 toward the inner bottom periphery of the washing tub 2 by the water flow, and
The direction is changed at the periphery of the inner bottom of the washing tub 2 and the water flows upward. In this way, the laundry is placed in washing tub 2.
In the process of changing direction at the periphery of the inner bottom of the machine, the laundry is turned upside down. This laundry then reaches the upper side, and in its place the laundry that had been located above descends and reaches the vicinity of the inner bottom of the washing tub 2, and the above-mentioned up-and-down reversal of the laundry is repeated. In this way, the laundry is turned upside down and is flowed along the inner circumferential side of the washing tub 2 by the whirlpool water flow generated throughout the water in the washing tub 2 by the rotation of the pulsator 11, so that it can be washed evenly and effectively. Washed. In the case of this embodiment, since the pulsator 11 is intermittently rotated forward and reverse, the rotation of the pulsator 11 is intermittently stopped for a predetermined period of time, but when the pulsator 11 is stopped, the water flow in the washing tub 2 is weakened. , the laundry settles due to its own weight and reaches the vicinity of the inner bottom of the washing tub 2. In this case, due to the subsequent rotation of the pulsator 11, the arrow A
Since the directional water flow is generated, the settled laundry is turned upside down by the water flow, and thereby the laundry is turned upside down more frequently, and the washing performance is further improved. By the way, if the cover is formed into a horizontal flat surface as in the conventional method, it is difficult for water to flow on the cover during draining, resulting in a drawback that water draining becomes difficult during draining. In contrast, in this embodiment, the cover 12 is tilted downward toward the outer circumference, so the cover 12
The water on the top quickly flows to the outer periphery and drains well.

In addition, FIG. 3 shows an agitating type washing machine equipped with a washing tub 13 molded using the same mold as that used to mold the washing tub 2, and the washing tub 13 has a recess 14 ( An insertion hole 15 is formed in the center of the recess 3 (same shape as the recess 3). This third
In the figure, reference numeral 16 denotes a transmission mechanism attached to the lower surface of the recess 14, on which a washing shaft 17 and a drive shaft 18 are pivotally supported, and a driven pulley 7 is fitted to the lower end of the drive shaft 18. In addition, the washing shaft 17 has an insertion hole 15
A large-diameter stirring body 19 is attached to the upper end of the stirrer 19 with its lower peripheral edge accommodated within the recess 14 . In the agitation type washing machine configured in this manner, the laundry is washed in a state similar to so-called massaging due to the gentle rotation of the agitation body 19.

[Effect of idea]

As is clear from the above description, the present invention provides a small-diameter pulsator on the washing shaft located eccentrically in a recess in the inner bottom of the washing tub, and a cover is provided in the space surrounding the pulsator in the recess in the washing tub. , since the cover is configured to have a shape that slopes downward toward the outer circumference with the axis of the pulsator as the center,
To generate a water flow in a washing tub that flows downwardly and inclines toward the outer periphery along a cover, collides with the inner bottom periphery of the washing tub, and changes its direction upward, and this water flow turns the laundry upside down. Thus, it is possible to provide a washing machine that has excellent effects of improving cleaning performance.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, in which FIG. 1 is a partial perspective view, FIG. 2 is a vertical sectional view taken along the line - in FIG. 1, and FIG. FIG. 2 is a view corresponding to FIG. 2 when configured as an agitation type washing machine. In the drawing, 2 is a washing tub, 3 is a recess, 4 is an insertion hole,
6 is a washing shaft, 11 is a pulsator, 12 is a cover,
13 is a washing tub, 14 is a recess, 15 is an insertion hole, 17
19 is a washing shaft, and 19 is a stirring body.

Claims (1)

[Scope of utility model registration request] A washing tub in which a recessed part capable of accommodating a large-diameter agitator is formed in the inner bottom, and an insertion hole for inserting a washing shaft is selectively formed in the center or eccentric position of the recessed part by replacing the mold nest. The washing tub is provided with a washing tub in which the insertion hole is formed at an eccentric position of the recess, wherein a small-diameter pulsator is provided on the washing shaft in the recess, and a space around the pulsator in the recess is covered in the washing tub. A washing machine characterized in that the cover is formed to be inclined downwardly toward the outer circumferential side with the axis of the pulsator as the center.