JPH09201488A - Washing machine with dehydrator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce flexible deformation of a rotating drum during the dewatering step. SOLUTION: A rotating drum consists of an inner drum 18 and an outer drum 19. The inner drum 19 consists of a metallic cylinder 21 to which a resin bottom plate is joined, the former being provided with a number of holes 21a through which water flows out. The outer drum is of resin, with the top and bottom joined to the top and bottom of the inner drum 19, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water washing machine having a rotary tub that is water-saving.

[0002]

Conventionally, a spin-drying type washing machine of a water-saving type has been used. In this case, the rotary tub has a dehydration opening only in the upper part, and water is stored only inside the rotary tub, and water is not stored in the water receiving tub outside thereof, and washing is performed. Is rotated so that water is pumped up and dehydrated from the dehydration opening.

FIG. 7 shows an example of this type of dewatering and washing machine. A rotating tank 2 is provided inside the water receiving tank 1, and the rotating tank 2 has a resin tank body 3 having an opening 3a for dehydration formed on an upper portion thereof. Metal inner basket 4 having a large number of water passage holes 4a on its surface
It is attached so that a gap 5 for water passage is formed. In this case, the upper end of the inner basket 4 is screwed to the upper end of the tank body 3, and the lower end is fitted into the recess 3b of the tank body 3. A bottom cover 6 is attached to the inner bottom of the tank body 3.

However, in the above-mentioned conventional structure, when an unbalance occurs during the rotation of the rotary tub 2, that is, during dehydration, the rotary tub 2 is likely to be flexibly deformed in the swinging direction, and the whirling of the rotary tub 2 as a whole is caused. Larger volume, conversely water receiving tank 1
There is a risk that the gap between and will get smaller. Therefore, it is necessary to increase the gap between the rotary tub 2 and the water receiving tub 1 in advance, and the dehydration / washing machine as a whole becomes large. In particular, when performing dehydration after using hot water for washing or when performing dehydration when the ambient temperature is high, the flexible deformation of the rotary tub 2 in an unbalanced state is large.

When the cause of this flexible deformation was investigated, the following was found. When the rotary tub 2 is rotated by dehydration, the laundry containing water inside is mainly pressed against the inner basket 4 by the centrifugal force. In this case, since the lower end of the inner basket 4 is only fitted to the tub body 3, almost all centrifugal force of laundry or water, that is, dehydration load is applied to the peripheral wall portion of the tub body 3. As a result, the tank body 3 is easily deformed flexibly.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a washing machine for combined use of dewatering, which can reduce the flexible deformation of the rotary tub during dewatering and contribute to downsizing of the whole. is there.

[0007]

According to the present invention, a water receiving tank is provided with a rotary tank having a dehydration opening only in an upper portion, and water is stored in the rotary tank for washing. In the one which is dehydrated from the dehydration opening by rotating, the rotating tank is made of a metal tubular member having a large number of water passage holes and a resin member fixed to the lower end portion of the tubular member. A configuration in which an inner tank body composed of a bottom member and a peripheral wall portion integrally formed from a bottom wall portion, and an outer tank body made of resin fixed to the upper and lower portions of the inner tank body respectively at an upper portion and a lower portion are formed. It is characterized by

According to this structure, in the rotary tank, the outer tank body stores water, and the inner tank body secures a water passage gap with the outer tank body during dehydration. Then, when dehydration is performed, the centrifugal force of the laundry containing water as a dehydration load inside the rotary tub is applied to the tubular member of the inner tub body. In this case, the lower end portion of this tubular member is fixed to the bottom member, that is, the inner tank body is integrated, and the peripheral side portion is made of a metallic tubular member that is difficult to be flexibly deformed. It is possible to receive a dehydration load without causing flexural deformation. Therefore, a dehydration load is hardly applied to the outer resin-made outer tank body. As a result, even if dehydration is performed after washing with hot water, or if imbalance occurs during dehydration, the flexible deformation of the rotary tub can be prevented, and the whirling amount of the rotary tub can be reduced. It is possible to contribute to downsizing of the entire washing machine.

According to another aspect of the invention, a water tub is provided with a rotary tub having a dehydration opening only at an upper portion, water is stored in the rotary tub for washing, and the rotary tub is rotated to rotate the water. In the case of dehydrating from the dehydration opening, the rotary tank is fixed to a metal cylindrical member having a large number of water passage holes and a lower end portion of the cylindrical member and is continuously connected to an upper outer peripheral surface in the circumferential direction. An inner tank body made of a resin bottom member having a convex portion formed therein, and a tubular shape, and an upper portion fixed to an upper portion of the inner tank body and a lower portion made of a resin welded to the convex portion. It is characterized by being configured with an outer tank body.

In this structure, the outer tank body is formed into a tubular shape, and the lower end portion of the outer tank body is welded to the convex portion of the outer peripheral surface of the upper portion of the bottom member of the inner tank body, whereby the water storage in the rotary tank is reduced. The outer tank body and the bottom member are secured, and the outer tank body has a tubular shape, so that it is possible to reduce the weight of the outer tank body and thus the weight of the rotary tank.

When the outer tank body is formed into a tubular shape in this way, the degree of freedom in molding the outer tank body is increased. That is,
When the outer tank body has a bottom portion, when molding the outer tank body, it is necessary to form a tapered cylindrical shape in which the peripheral wall expands upward due to the relationship of die cutting. In this regard,
When the outer tank body is formed into a tubular shape, it can be molded so as to have a tapered tubular shape that expands downward.

With such a downwardly widening taper cylinder shape, unlike the above-described upwardly widening taper cylinder shape, the diameter of the upper part of the rotary tank can be made small, which can further contribute to downsizing of the whole. Become.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. First, FIG.
Shows the entire structure of the washing machine that also serves as a dehydrator.
A plurality of water receiving tanks 12 (only one of which is shown) are elastically supported in the inside of 1. A drive mechanism 15 having a motor 14 as a main component is arranged at the outer lower portion of the water receiving tank 12. In this drive mechanism 15, a dehydration shaft 16 rotated during dehydration is projected into the bottom of the water receiving tank 12, and a tank mounting plate 17 is fixed to the upper end of the water receiving tank 12.

A rotating tank 18 is provided inside the water receiving tank 12. This rotary tank 18 is the inner tank body 1.
9 and the outer tank body 20. As shown in FIG. 1, the inner tank body 19 is configured to include a tubular member 21 and a bottom member 22. That is, the tubular member 21 is formed by forming a metal, for example, a stainless steel plate into a straight cylindrical shape, has a large number of water passage holes 21a formed therein, and has a plurality of water passage holes 21a formed in the lower portion so as to be vertically separated from each other. The protrusions 21b and 21c (see FIG. 3) are formed so as to slightly project to the right. The bottom member 22 is made of resin, and has a bottom main body portion 22a and a peripheral side portion 22b which are continuously formed. A plurality of reinforcing ribs extending in the vertical direction are formed on the outer lower surface of the bottom main body portion 22a. 22c is formed, and the peripheral side portion 22 is formed.
A plurality of reinforcing ribs 22d protruding in the radial direction are provided on the outer side surface of b.
Are formed.

A plurality of vertically extending screw boss portions 22e are formed on the reinforcing rib 22c, and a radially extending screw boss portion 22f is formed on the other reinforcing rib 22d. . In addition, as shown in FIG. 4, the reinforcing rib 2 is formed on the lower surface of the bottom main body portion 22a.
A water channel 23 for drainage is formed in a shape in which 2c is cut out in the radial direction.

The tubular member 21 and the bottom member 22 are clamped between the ridges 21b and 21c by vertically crimping a portion from the upper end of the peripheral wall portion 22b of the bottom member 22 to the lower reinforcing rib 22d. In addition, they are fixed to each other by tightening the screw 24 to the screw boss portion 22f.

On the other hand, the outer tank body 20 is made of resin, and is integrally formed with a bottom wall portion 20a and a peripheral wall portion 20b.
A large number of dehydration holes 20c, which are openings for dehydration, are formed in a horizontal row at the upper end of the peripheral wall 20b. The upper portion of the outer tank body 20 (the upper end portion of the peripheral wall portion 20b) is attached to the upper portion of the inner tank body 19 (the upper end portion of the tubular member 21) by screws 25. In this case, the balance ring 26 and the inner tank body 19 and the outer tank body 20 are fastened together. Further, the lower portion (bottom wall portion 20a) of the outer tank body 20 is sandwiched between the tank mounting board 17 and the bottom member 22 of the inner tank body 19 and is tightened with the screw 27 to the screw boss portion 22e. At the same time as being fixed to the inner tank body 19, it is attached to the tank mounting board 17. In this case, the inner tank body 19
A water passage gap 28 is formed between the outer tank body 20 and the outer tank body 20.

A water passage portion 20d is formed at the center of the outer tank body 20, and the water passage portion 20d and the screw 27 portion are appropriately sealed. Further, the tank mounting board 17 is also formed with a water passage portion 17a communicating with the water passage portion 20d, and the water passage portion 17a is provided in the drainage channel 2 provided at the bottom of the water receiving tank 12.
9 (see FIG. 2), the water trap 12 is connected to a first drain port 31 adjacent to the water level detecting air trap 30. Further, the air trap 30 and the first drain port 31 drain water. It communicates with the drain hose 33 via the valve 32. A second drain port 34 is formed in the water receiving tank 12 at an outer portion of the drainage channel 29, which is connected to the drain hose 33 (not shown). Here, the washing shaft 35 which is rotated at the time of washing is inserted from the dehydration shaft 16 into the rotary tub 18, and the stirring body 36 is fixed to the upper end portion thereof.

In the above structure, when washing such as washing and rinsing, the drain valve 32 is closed, and the water used for rinsing and rinsing is stored in the rotary tub 18. That is, water is not stored in the water receiving tank 12. And the stirring body 3
When the washing and rinsing in which 6 is rotated in the normal and reverse directions are executed and completed, the drain valve 32 is opened and the water in the rotary tank 18 is discharged. This water passes through the water passage portion 20d, the water passage portion 17a and the drainage path 29, and is discharged out of the machine through the first drainage outlet 31 and the drainage hose 33. The water between the inner tank body 19 and the outer tank body 20 flows from the water passage gap 28 to the water passage 2
3 and reaches the water passage portion 20d and is discharged as described above.

On the other hand, at the time of dehydration, the rotary tank 18 is rotated to pump water and dehydrate through the dehydration hole 20c. That is, the laundry containing water is pressed against the inner surface of the inner tub body 19 by the centrifugal force, and the water exits from the water passage hole 21a of the tubular member 21 and reaches the inner surface of the outer tub body 20. The water is pumped through the water passage gap 28 between the outer tank body 20 and the outer tank body 20 and discharged into the water receiving tank 12 through the dehydration hole 20c. This water is discharged to the outside of the machine through the second drain port 34 and the drain hose 33.

At the time of this dehydration, the centrifugal force of the laundry containing water as a dehydration load inside the rotary tub 18 is
Mainly on the tubular member 21. In this case, this tubular member 21
The lower end portion of is fixed to the bottom member 22, that is, the inner tank body 19 is integrated, and the dehydration load is mainly received by the metal tubular member 21 which is not easily deformed flexibly, so that it is deformed flexibly. You will be able to take the dehydration load without coming. Therefore, the outer resin-made outer tank body 20
Almost no dehydration load is applied to. As a result, the deformation of the rotary tank 18 is prevented. This can contribute to downsizing of the entire washing machine.

Further, at the time of drainage, water existing between the inner tank body 19 and the outer tank body 20 is satisfactorily discharged from the water passage gap 28 formed on the lower surface of the bottom member 22 of the inner tank body 19. Therefore, no residual water is generated.

FIG. 5 and FIG. 6 show a second embodiment of the present invention. In this embodiment, the structure of the rotary tank 51 is different from that of the first embodiment. That is, on the outer peripheral surface of the upper portion of the bottom member 22 of the inner tank body 19 in the rotary tank 51, a convex portion 52 (also shown in FIG. 6) continuous in the circumferential direction is formed, and the outer tank body 53 is It is formed in a tubular shape, and in this case, it is formed in a tapered tubular shape (so-called downward widening tapered tubular shape) in which the inner diameter dimension A of the upper portion is larger than the inner diameter dimension B of the lower portion. Furthermore, this outer tank body 53
A dehydration hole 53a and a balance ring 54 are integrally formed on the upper part of the.

The lower end of the outer tank body 53 is welded to the convex portion 52 of the bottom member 22 of the inner tank body 19,
A fitting portion 55 between the upper end of the outer tank body 53 and the balance ring 54 is fitted and fixed to the upper end of the inner tank body 19. Although not shown in the figure, the welding method is to heat a hot plate, and heat and melt the lower end portion of the outer tank body 53 and the convex portion 52 of the inner tank body 19 by the hot plate, and press-contact each other.
After that, it is cooled and fixed.

In this second embodiment, the outer tank body 5
By welding the lower end portion of 3 to the convex portion 52 on the upper outer peripheral surface of the bottom member 22 of the inner tank body 19, the outer tank body 53 is
The outer tank body 53 has a size substantially corresponding to that of the cylindrical member 21, that is, the bottom portion of the outer tank body 53 is not required, and the outer tank body 53 can be formed in a tubular shape without any problem. Therefore, the weight of the outer tank body 53 can be reduced. Further, the lower end of the outer tank body 53 and the inner tank body 19
Since it is welded to the convex portion 52 of the bottom member 22, the watertightness is good.

And, in the case of such a tubular shape,
The degree of freedom in forming the outer tank body 53 increases. That is, when the outer tank body 53 has a bottom portion, when molding the outer tank body 53, it is necessary to form the peripheral wall in a tapered cylindrical shape so as to widen upward in view of die cutting. However, if the outer tank body 53 is cylindrical, it can be molded so as to have a tapered cylindrical shape that widens downward.
Further, in this embodiment, the outer tank body 53 is formed so as to have a tapered cylindrical shape that widens downward, so that in the rotary tank 51, the inner tank body 19, the outer tank body 53, and the water passage gap 56. Can be narrowed at the top, ie
It is possible to prevent the diameter of the upper part of the rotary tank 18 from increasing.

That is, if the outer tank body 53 has a tapered cylindrical shape that widens upward, the water passage gap 56 between the inner tank body 19 and the outer tank body 53 becomes narrower in the lower part, and at this portion. When the water passage capacity is secured, the inner tank body 19, the outer tank body 53, and the water passage gap 56 become considerably wide in the upper portion, and the diameter of the upper portion of the rotary tank 18 increases. However, in this embodiment, as described above, the outer tub body 53 is formed so as to have a tapered tubular shape that widens downward, so that the inner tub body 1 in the rotary tub 51 is formed.
9 and the outer tank body 53 and the water passage gap 56 can be narrowed in the upper part, and the increase in diameter of the upper part of the rotary tank 18 can be suppressed. This can further contribute to downsizing of the entire washing machine.

Further, in this embodiment, by forming the outer tank body 53 into a cylindrical shape, the balance ring 54 can be integrally formed on the upper end portion in terms of molding, whereby manufacturability and assemblability are achieved. Can be improved.

The outer tank body may be separate from the balance ring. In this case, since the outer tank body simply has a cylindrical shape,
The lower end portion of the outer tank body and the convex portion may be welded together by friction welding where the outer tank body is rotated at a high speed and pressed against the convex portion to be welded.

[0030]

As apparent from the above description, the present invention has the following effects. According to the first aspect of the present invention, the inner tank body is configured by integrating the tubular member and the bottom member, and the circumferential side portion of the inner tank body is configured by the metal tubular member that is not easily deformed. Therefore, the dehydration load at the time of dehydration can be received without being flexibly deformed by the inner tub itself, and the dehydration load on the resin outer tub can be reduced. As a result, washing with hot water was performed. Even if it is dehydrated later or if an imbalance occurs during dehydration, the flexible deformation of the rotary tub can be prevented, which reduces the whirling of the rotary tub and contributes to downsizing of the entire washing machine. it can.

According to the second aspect of the invention, at the time of draining, the water existing between the inner tank body and the outer tank body is well discharged from the water passage gap formed on the lower surface of the bottom member of the inner tank body. Therefore, residual water will not be generated.

According to the third aspect of the present invention, the outer tank body is formed into a tubular shape, and the lower end portion of the outer tank body is welded to the convex portion of the upper outer peripheral surface of the bottom member of the inner tank body. It is possible to reduce the weight of the outer tank body and thus the weight of the rotary tank while ensuring water storage by the body. According to the invention of claim 4, since the outer tank body is formed in a so-called downwardly widening tapered cylindrical shape, the diameter dimension of the upper part of the rotary tank can be reduced, which can further contribute to downsizing of the whole. According to the invention of claim 5, since the balance ring is integrally formed on the upper portion of the outer tank body, the manufacturability and the assemblability can be improved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional side view of a main part showing a first embodiment of the present invention.

FIG. 2 is an overall vertical side view.

FIG. 3 is a vertical cross-sectional side view of a fixed portion between a tubular member and a bottom member.

FIG. 4 is a vertical cross-sectional side view of a main part in which the cross-sectional portion of the bottom member is different from FIG.

FIG. 5 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 6 is a vertical sectional side view of a fixed portion between the outer tank body and the bottom member.

FIG. 7 is a diagram corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

12 is a water receiving tank, 17 is a tank mounting plate, 18 is a rotating tank, 19 is an inner tank body, 20 is an outer tank body, 21 is a cylindrical member, 22 is a bottom member, 23 is a water channel, 28 is a water passage gap, 29 Is a drainage channel,
36 is an agitator, 51 is a rotary tank, 52 is a convex portion, 53 is an outer tank, and 54 is a balance ring.

Claims (5)

[Claims] 1. A water receiving tub is provided with a rotating tub having an opening for dehydration only in an upper portion, water is stored in the rotating tub for washing, and the rotating tub is rotated to rotate the dehydrating opening. The inside of the rotary tank is composed of a metal tubular member having a large number of water passage holes and a resin bottom member fixed to the lower end of the tubular member. A resin in which a tank body and a peripheral wall portion are integrally formed from a bottom wall portion, an upper portion and a lower portion are fixed to an upper portion and a lower portion of the inner tank body, respectively, and a water passage gap is formed between the tank body and the inner tank body. A washing machine for combined use of dehydration, which is composed of an outer tub body made of water. 2. The washing machine for combined use of dehydration according to claim 1, wherein a water channel for drainage is formed on the lower surface side of the bottom member of the inner tub body. 3. A spinning tub having an opening for dehydration only in the upper portion is provided inside the water receiving tub, water is stored in the spinning tub for washing, and the spinning tub is rotated by rotating the spinning tub. In the one in which the rotary tank is dehydrated from the above part, the rotary tank is provided with a metal cylindrical member having a large number of water passage holes and a convex portion fixed to the lower end of the cylindrical member and continuous in the circumferential direction on the upper outer peripheral surface. An inner tank body composed of a resin-made bottom member, and a resin-made outer tank body having a tubular shape, the upper portion of which is fixed to the upper portion of the inner tank body and the lower portion of which is welded to the convex portion. A washing machine for combined use of dehydration, which is composed of 4. The washing machine for dehydration and combined use according to claim 3, wherein the outer tub body is formed in a tapered cylindrical shape in which an inner diameter dimension of a lower portion is larger than an inner diameter dimension of an upper portion thereof. 5. The washing machine for combined use of dehydration according to claim 4, wherein a balance ring is integrally formed on the upper portion of the outer tub body.