JP2701756B2 - Dehydration washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer tub supported in a vibration-proof manner in an outer frame, and a bottomed cylindrical washing and removing device rotatably supported in the outer tub about an axis substantially perpendicular to the outer tub. Aquarium (basket)
A so-called spiral type dehydrating washing machine in which a rotating blade is driven at the time of washing and rinsing, and the basket is rotated at a high speed at the time of spin-drying. The present invention relates to a dehydration washing machine having a basket made of water.

[0002]

2. Description of the Related Art A basket of a conventional dehydration washing machine has been made as an integrally molded plastic article as disclosed in Japanese Patent Application Laid-Open No. 57-203492.

Prior to the practical use of plastic baskets, steel plates coated with a rust preventive such as enamel were used.

Further, in a commercial drum type washing machine using hot water or a solvent as a cleaning liquid, a drum type washing machine in which a drum is made of a stainless steel plate has been put to practical use.

[0005]

In the plastic basket, it is necessary to increase the strength of the basket itself in order to withstand a large vibration force caused by imbalance during dehydration. A rib is stretched around the outer peripheral surface. For this reason, many unevenness | corrugation arises on the outer peripheral surface of a basket, and there exists a possibility that a detergent scum may accumulate | deposit and a mold may generate | occur | produce by long-term use.

Further, since the actual thickness of the basket is increased due to the increase in the thickness and the presence of the ribs, there is a problem that the inner volume of the basket becomes smaller than the inner volume of the outer tank.

[0007] In the case of a basket in which a steel plate is painted, not only the number of production steps is increased and there is a problem in productivity, but also there is a possibility that the paint will be peeled off and rusted over a long period of use.
There is a problem that the cleanliness is impaired.

Further, the drum made of stainless steel plate used in the drum type washing machine is subjected to a very large excitation force due to the rotation of the drum around the horizontal axis during washing and spin-drying, and the strength and strength of the drum are reduced. The rigidity is made of a thick steel plate so as to withstand it, and if it is applied to a vortex type dehydrating washing machine as it is, the quality becomes excessive.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dehydrating washing machine having a basket which is improved in the above-mentioned prior art and has a clean, productive, lightweight and highly rigid basket corresponding to a large capacity. It is in.

[0010]

SUMMARY OF THE INVENTION The present invention provides an outer frame, a water receiving tank which is installed in the outer frame, and which is suspended and supported by the outer frame via a hanging rod, and which is installed in the water receiving tank. A washing and dewatering tub, and a rotary wing provided at the center of the bottom of the washing and dewatering tub, wherein the washing and dewatering tub is formed of a cylindrical body formed of a stainless steel plate and a stainless steel plate of the body. In a dehydration washing machine having a dish-shaped bottom plate formed of a thick stainless steel plate and a balance ring provided on the upper side of the washing and dewatering tub, approximately U is provided around the lower end of the body.
It has an annular body-side folded piece that rises outward so as to form a U-shaped groove, and hangs inward so that a substantially inverted U-shaped groove is formed around the upper end side of the bottom plate. An annular bottom plate-side folded piece is provided, the body-side folded piece is fitted into the inverted U-shaped groove, and the bottom plate-side folded piece is fitted into the U-shaped groove, and By a crimping connection formed so as to surround the lower end side outer periphery with the upper end side of the bottom plate portion, the body portion and the bottom plate portion are fastened to each other, and the balance ring has a donut shape in which liquid is sealed inside. It is formed of a plastic molded product, and the outer periphery of the washing and dewatering tub and the outer periphery of the balance ring are substantially flush with each other.

[0011]

[Function] The washing and dewatering tub consists of a thin stainless steel plate for the body, a thick stainless steel plate for the bottom plate, and a plastic molded product for the balance ring. There is no need to stretch around, there is no risk of detergent residue sticking, and it is clean. Further, the thickness of the body can be made sufficiently thinner than that of the plastic, so that the ratio of the inner volume of the washing and dewatering tub to the inner volume of the outer tub can be increased.

Further, the thickness and thickness of the bottom plate portion where the largest bending moment is generated during dehydration are increased to increase the strength and rigidity, and a relatively rigid balance ring is fixed upward, so that the washing and dehydrating tub is provided. Has light weight and high rigidity as a whole, and has less deformation during dehydration.

[0013] Further, a coating agent or the like is unnecessary, and the productivity is good.

Further, since the body and the bottom plate made of stainless steel plate are crimped together without welding, they are suitable for mass production. In addition, since the stainless steel plate is crimped to prevent the material from being easily changed by welding, there is no possibility of rusting.

Further, since the lower end side of the body is surrounded by a thick bottom plate from the outer periphery and is crimped and joined, it is more durable and has a higher speed of dehydration than that which is surrounded from the outer periphery by a thin body. It is suitable for a rotating spin-drying washing machine.

Further, in this crimping connection, the amount of crimping protruding to the outer periphery on the lower end side of the body is extremely small. Therefore, the gap between the washing and dewatering tub and the water receiving tub can be narrowed, so that the capacity of the washing and dewatering tub can be increased.

Furthermore, the connection between the body and the bottom plate is made by directly crimping the two without using separate parts.
It does not require extra parts for connection and is more robust than one that connects another part to the interposition.

In addition, since the donut-shaped balance ring in which the liquid is sealed and the outer periphery of the washing and dewatering tub are substantially flush,
The balance ring does not contact the inner periphery of the water receiving tank during high-speed dehydration, and the balance ring has a large vibration suppression effect.

[0019]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a spiral dewatering washing machine. An outer frame 1 is formed by pressing a steel plate into a box shape, and a suspending rod receiver 1a having a concave spherical surface is provided at the four corners at the upper end.
On the lower surface of the outer frame 1, four legs 1b are provided. The top cover 2 surrounding the upper surface of the outer frame includes a lid 3, a back panel 3a, and a control unit 20.

The water receiving tub 4 is formed as an integrally molded product of plastic and rotatably supports a washing and dewatering tub 30 therein. The water receiving tank 4 merely stores washing water or receives dehydration by centrifugal dehydration. An air reservoir 4a bulging laterally is provided integrally near the bottom of the water receiving tank 4, and a water level sensor 6 is connected to the reservoir 4a via an air hose 5. The water level sensor 6 gives a water level signal in the water receiving tank to the control unit 20 to control the water supply valve 23. The water supply valve 23 is connected to a water tap via a hose 24.

A metal base 14 is attached to the bottom rear surface of the water receiving tank 4 by screwing. Four stays 4 extending radially from the base 14 along the outer surface of the water receiving tank 5
A hanging rod receiver 4b is formed at the upper end of the rod c, and the hanging rod 7 penetrates this portion. The upper end of the hanging rod 7 is a hanging rod holder 8.
And is swingably supported by the hanging bar receiver 1a of the outer frame 1 via the.

A vibration isolating spring 9, a spring receiver 10, and a sliding cylinder 7c are interposed at a connecting portion between the hanging rod receiver 4a and the hook 7a at the lower end of the hanging rod 7, and the water receiving tank 4 is connected to the outer frame 1. It has elastic support. A drive mechanism 18 including a reduction gear, a brake, a clutch 18d, and the like, and a main motor 15 are fixed to the base 14. The driving force of the main motor 15 is controlled by a motor shaft 15 a, a pulley 16, and a belt 17.
8 is transmitted to the pulley 18c.

The driving force transmitted to the pulley 18d is transmitted to the rotary blade shaft 18a via the reduction gear to drive the rotary blade 13. A flange 42 is screwed to the bottom of the washing and spin-drying tub 30, and a hollow basket shaft 18 b extending downward coaxially with the rotary blade shaft 18 a is provided at the center of the flange 42.

A clutch 18d and a brake are provided between the basket shaft 18b and the pulley 18c, and the washing and dewatering tub 30 is kept stationary during the washing and rinsing operations.
During the spin-drying operation, the washing and spin-drying tub and the rotor are driven together.

Reference numeral 19 denotes a seal at a portion where the basket shaft 18b passes through the bottom of the water receiving tank 4, reference numeral 21 denotes a drain hole, and reference numeral 21 denotes a drain hole.
a drain valve, 22 is a drain hose.

FIG. 2 shows a detailed structure of the washing and dewatering tub 30. The washing and dewatering tub 30 is roughly divided into four parts. That is, a balance ring 40 of a plastic molded product in which a fluid is sealed therein, an upper ring 31 for facilitating attachment of the balance ring, and a body formed by rolling a stainless steel plate and crimping the end to form a cylindrical shape. 32 and a bottom plate portion 33 formed by pressing a stainless steel plate into a dish shape.

The body 32 is provided on its circumferential surface with convex portions 32a and 32b for improving the cleaning effect and a burring dewatering hole 32c which is open on the outer peripheral side. The body 32 is formed by rolling a single stainless steel plate into a cylindrical shape using a rolling machine, and crimping the ends with 32d as shown in FIG.

As shown in FIGS. 3 and 4, the bottom plate portion 33 is formed by pressing a stainless steel plate having a thickness greater than that of the body portion into a dish shape. A hole 30a is drilled in the center of the bottom plate,
At 33a, a mounting surface for the flange 42 is formed. The connection between the flange 42 and the bottom plate 33 is made by a pierce nut 33b driven into the lowermost surface 33a and a bolt screwed from below the flange 42.

A convex portion 30c is provided at the inner corner of the bottom plate portion 33 to prevent the laundry from rotating together with the rotary blade 13 when the rotary blade 13 rotates forward or backward.
Are provided several times.

As shown in FIGS. 5 and 6, the upper ring 31 has a cylindrical portion that rises around the opening 31a and a flange portion below the cylindrical portion that forms a step on which the balance ring 40 is placed. I have.

The connection between the upper ring 31 and the body 32 and the connection between the body 32 and the bottom plate 33 are made by crimping the entire circumference with fastenings 31b and 33c, respectively. 8 and 9 are cross-sectional views of each crimped portion.

The coupling between the upper ring 31 and the balance ring 40 is performed by placing the balance ring on the step of the upper ring and using screws (not shown).

The bottom plate 33 has the greatest bending moment during the spin-drying operation, and the thickness of the bottom plate is 1 to 1.5 mm.
If the plate thicknesses of the body portion 32 and the upper ring 31 to which only a relatively small external force acts are set to 0.6 mm and 0.5 mm, respectively, there is no practical problem.

In the spiral-type dehydrating washing machine having the above-described structure, a washing operation and a rinsing operation are performed by putting laundry and detergent into a washing machine and a dehydrating tub and supplying a predetermined amount of water. At the time of dehydration, the washing water in the outer tub is drained, and the washing and dehydration tub is rotated in one direction at a high speed.

A large vibration force acts on the washing and dewatering tub due to uneven distribution of the laundry during dehydration, and a large bending moment acts on the bottom plate portion 33 to which the shaft 18b is fixed. Since the plate thickness is thicker than that of, excessive stress does not occur.

The imbalance at the time of dehydration generates a force for biasing the peripheral wall of the body 32 outwardly, which acts to deform the horizontal cross section of the basket into an elliptical shape. However, a rigid bottom plate is attached below the washing and dewatering tub, and a balance ring 40 is fixed above, so that the horizontal cross section of the basket above and below the trunk is firmly supported so as to maintain a perfect circle. Therefore, the amount of deformation of the washing and dewatering tub is very small. This means that even if the gap between the washing and dewatering tub and the water receiving tub is made smaller, the washing and dewatering tub does not come into contact with the water receiving tub during dewatering, and the gap can be reduced accordingly.

Further, since the body occupying most of the outer surface of the washing and dewatering tub is made of a stainless steel plate, the amount of detergent residue adhering to the outer surface is reduced, and the washing machine can be kept clean for a long period of time.

Here, the crimping connection between the body portion 32 and the bottom plate portion 32 will be described in detail again.

As shown in FIG. 8, the body 32 has an annular body-side folded piece 32 'that rises outward so as to form a substantially U-shaped groove around the lower end.

The bottom plate 33 has an annular bottom plate-side folded piece 33 'that hangs down so that a substantially inverted U-shaped groove is formed around the upper end.

The body-side folded piece 32 'of the body 32 is fitted into the inverted U-shaped groove, and the bottom plate-side folded piece 33' of the bottom plate 33 is fitted into the U-shaped groove. The body portion 32 and the bottom plate portion 33 are fastened by crimping connection formed so as to surround the lower end from the outer periphery to the upper end side of the bottom plate portion.

In this crimping connection, the connecting portion is located on the outer periphery of the body portion, but the amount of protrusion in the outer peripheral direction is small. For this reason, the gap between the outer tub 4 located on the outer periphery of the washing and dewatering tub 30 can be made smaller than that having a large amount of protrusion. Washing and dewatering tub 3 as much as the gap is narrowed
Since the outer diameter of 0 can be increased, the inner volume of the washing and dewatering tub increases.

Alternatively, the crimped connection is formed such that the lower end of the thin body 32 is surrounded from the outer periphery on the upper end side of the thick bottom plate 33, so that the thin body 32 has a small thickness.
The structure is more durable than that in which the lower end of the bottom plate 33 surrounds the upper end of the bottom plate 33 from the outside.

Stainless steel plates are more difficult to weld than normal steel plates. On the other hand, the crimping connection has good workability and is suitable for mass production. The material of the stainless steel plate is easily changed by welding, and there is a possibility that rust may occur. Haze folding does not have such a problem of rust.

The body 32 and the bottom plate 33 are connected to the bottom plate 33.
The body-side folded piece 32 ′ of the body 32 is inserted into the inverted U-shaped groove of FIG.
Is inserted into the U-shaped groove of the body 32 with the bottom plate-side folded piece 33 'of the bottom plate 33 so that the body 32 and the bottom plate 33 are directly connected. For this reason, an extra connecting part for connecting the body 32 and the bottom plate 33 is unnecessary and robust. When another coupling component is interposed, the workability is poor and the structure tends to be weak.

The balance ring 40 is a plastic molded product in which liquid is sealed inside, and is made separately from the washing and dewatering tub 30 made of stainless steel plate.

Although the body 32 of the washing and dewatering tub 30 is made of a thin stainless steel plate, a thick bottom plate is attached to the lower side and a balance ring 40 is attached to the upper side. Can be suppressed small. Therefore, the gap between the water receiving tub 4 and the washing and dewatering tub 30 can be reduced, and the capacity of the washing and dewatering tub 30 can be increased.

The outer circumference of the balance ring 40 is substantially flush with the outer circumference of the washing and dewatering tub 30. The balance ring 40 is a plastic fluid balancer in which a liquid is sealed as described above. Increasing the diameter of the outer periphery increases the effect of suppressing the vibration of the balancer.
However, when the diameter of the outer periphery is increased, the gap with the water receiving tub 4 becomes too small, so that the washing and dewatering tub 30 comes into contact with the water receiving tub 4 during high-speed spinning. The outer periphery of the balance ring 40 and the outer periphery of the washing and dewatering tub 30 are made flush with each other in view of the problem of the contact and the effect of suppressing the vibration of the balancer.

[0049]

As described above, in the present invention,
An outer frame, a water receiving tank disposed inside the outer frame, and supported by being suspended from the outer frame via a hanging rod; a washing and dewatering tank disposed in the water receiving tank; and a bottom portion of the washing and dewatering tank. A rotating blade installed in the center, the washing and dewatering tub is a dish-like body formed of a cylindrical body formed of a stainless steel plate and a stainless steel plate having a greater thickness than the stainless steel plate of the body. In a dehydration washing machine having a bottom plate portion and a balance ring provided on an upper side of a washing and dewatering tub, an annular shape rising outward so as to form a substantially U-shaped groove around a lower end side of the body portion. An inverted U-shaped portion having a body-side folded piece, and an annular bottom plate-side folded piece that hangs inward so that a substantially inverted U-shaped groove is formed around an upper end side of the bottom plate portion; The body-side folded piece is in the U-shaped groove, and the bottom plate-side folded piece is in the U-shaped groove. A piece is fitted, and a crimped connection formed so as to surround the lower end side outer periphery of the body portion at the upper end side of the bottom plate portion, thereby fastening the body portion and the bottom plate portion to form the balance ring. Is a dehydration washing machine formed of a donut-shaped plastic molded product in which a liquid is sealed inside, and the outer periphery of the washing and dewatering tub and the outer periphery of the balance ring are substantially flush.

According to this configuration, there are the following advantages.

(1). The body and bottom plate made of stainless steel plate are crimped together without welding, so they are suitable for mass production and there is no change in material due to welding. Suitable.

(2). Since the crimping connection is formed so that the lower end side of the body is surrounded from the outer periphery by the thick bottom plate from the outer periphery, it is stronger than the one that is surrounded from the outer periphery by the thin body of the body. Suitable for high speed dehydrating washing machine.

(3). In the swaging crimping connection, the amount of protrusion of the swaging crimping connection protruding to the outer periphery at the lower end side of the body is extremely small, and the gap between the washing and dewatering tub and the water receiving tank can be closed accordingly. Volume can be increased.

(4). The connection between the body and the bottom plate is made by directly crimping the two parts without using any separate parts, so that no extra parts are required and they are strong.

(5). Since the balance ring is formed of a donut-shaped plastic molded product in which liquid is sealed, the balance ring is easy to make and suitable for mass production.

(6). Since the outer circumference of the washing and dewatering tub and the outer circumference of the balance ring are almost flush, the gap between the inner circumference of the water receiving tub and the outer circumference of the balance ring is the same as the gap between the inner circumference of the water receiving tub and the outer circumference of the washing and dewatering tub. Similar dimensions are ensured, and the balance ring does not contact the inner periphery of the water receiving tank during high-speed spinning. Further, the diameter of the balance ring is made large until it is substantially flush with the outer periphery of the washing and dewatering tub, so that the vibration suppressing effect of the balance ring can be more expected.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a basket.

FIG. 3 is a plan view of a bottom plate portion.

FIG. 4 is a longitudinal sectional view of a bottom plate portion.

FIG. 5 is a plan view of an upper ring.

FIG. 6 is a longitudinal sectional view of an upper ring.

FIG. 7 is a sectional view of a crimped portion of the body.

FIG. 8 is a cross-sectional view of a crimped portion of a body portion and a bottom plate portion.

FIG. 9 is a sectional view of a crimped portion of the upper ring and the body portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outer frame, 4 ... Water receiving tank, 7 ... Hanging rod, 13 ... Rotor blade, 1
5 ... Main motor, 30 ... Washing and dewatering tub (basket), 3
2 ... body part, 33 ... bottom plate part, 40 ... balance ring.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-203492 (JP, A) JP-A-51-59469 (JP, A) JP-A-59-186597 (JP, A) JP-A 61-203 249499 (JP, A) Japanese Utility Model Showa 61-201693 (JP, U) Japanese Utility Model Showa 49-35170 (JP, U) Japanese Utility Model Showa 49-29429 (JP, Y1)

Claims (2)

(57) [Claims] 1. An outer frame, a water receiving tub mounted inside the outer frame and supported by being suspended from the outer frame via a hanging rod, a washing and dewatering tub provided in the water receiving tub, The washing and dewatering tub comprises a cylindrical body formed of a stainless steel plate and a stainless steel plate thicker than the stainless steel plate of the body. In a dehydration washing machine having a dish-shaped bottom plate portion and a balance ring provided above the washing and dewatering tub, a substantially U-shaped groove is formed around a lower end side of the body portion. An annular body-side folded piece that rises outward, and an annular bottom plate-side folded piece that hangs inward so that a substantially U-shaped groove is formed around the upper end side of the bottom plate, The body-side folded piece is provided in the inverted U-shaped groove, and the bottom portion is provided in the U-shaped groove. A part folded part is fitted, and a crimped connection formed so as to surround the lower end side outer periphery of the body part with the upper end side of the bottom plate part, thereby fastening the body part and the bottom plate part, The dewatering and washing machine, wherein the balance ring is formed of a donut-shaped plastic molded product in which liquid is sealed, and an outer circumference of the washing and dewatering tub is substantially flush with an outer circumference of the balance ring. 2. A dehydrating washing machine according to claim 1, wherein a dewatering hole provided in said body portion is formed with a burring hole which is extruded and opened to the outer peripheral side.