JP2748926B2 - 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 a washing machine having a washing and dewatering tub (basket) made of stainless steel plate, and more particularly to a structure of a stainless steel basket.

[0002]

2. Description of the Related Art A conventional basket is disclosed in JP-A-57-203492.
As described in Japanese Patent Application Laid-Open Publication No. H10-163, most of the products are made of plastic, and those made of stainless steel plate are only recently used in drum type washing machines.

[0003]

In the plastic basket, it is necessary to increase the strength of the washing tub itself that can withstand high-speed rotation during spin-drying. Therefore, it is necessary to increase the thickness of the washing tub or to extend a rib on the outer peripheral surface. Or

[0004]

If the washing machine has been used for many years, the cleaning residue adheres to the ribs extending around the outer peripheral surface or mold is generated, and adheres to the clothes again. In addition, since the actual thickness is increased due to the increase in the thickness and the ribs, there is a problem that the internal volume of the basket is correspondingly reduced.

An object of the present invention is to provide a washing machine having a clean basket corresponding to a large capacity, eliminating the above-mentioned disadvantages of the prior art.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a water receiving tank, a washing and dewatering tank which is provided in the water receiving tank and has a dewatering hole in a peripheral wall, and a rotary blade which is provided in the center of the bottom of the washing and dewatering tank. Wherein the washing and dewatering tub has a cylindrical body formed of a stainless steel plate and a dish-shaped bottom plate formed of a stainless steel plate thicker than the stainless steel plate of the body. In the vicinity of the lower end side of the body, there is an annular body-side folded piece that rises outward so that a substantially U-shaped groove is formed, and an annular shape that projects outward on the upper end of the bottom plate portion. A flange is provided, and an annular bottom plate-side rising piece is provided at an outer peripheral end of the flange, and an annular bottom plate-side hanging piece that is folded back inward from an upper end of the bottom plate-side rising piece is provided. The bottom plate-side hanging piece and the bottom plate-side rising piece Has a substantially inverted U-shaped groove formed between the body portion side folded piece in the inverted U-shaped grooves,
The U-shaped groove is fitted with the bottom plate-side hanging piece, and is folded so as to be pressed against the outer periphery of the lower end of the body. The body portion and the bottom plate portion are fastened by a crimped crimping connection formed so as to surround the body portion.

A durable washing and dewatering tub made of a stainless steel plate does not require ribs or the like on the outer peripheral surface, does not generate mold, and can increase the internal volume of the washing and dewatering tub.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an outer frame formed by pressing a steel plate, and has a hanging rod receiver 1a and a foot 1b.
Reference numeral 2 denotes a top cover that surrounds the upper surface of the outer frame 1 and has a lid 3, a back panel 3a, and a control unit 20. Numeral 4 is a tank for storing washing water in a water receiving tank or receiving only dehydration by centrifugal dehydration. 4a is an air reservoir connected to an air hose 5 and a water level sensor 6, and a water supply valve 2 is provided in a water receiving tank.
When the valve 3 is opened, the water supplied from the water supply device 24 is replaced with a water level and controlled. 4b is a hanging rod receiver,
In order to penetrate the suspension rod 7 and hold the spring 9,
0, the spring 9 and the spring receiver 1
0, the hook portion 7a is surrounded by the sliding cylinder 7c, and the upper portion is configured such that the hanging rod holder 8 for rotating and holding is positioned in the hanging rod receiver 1a. Reference numeral 14 denotes a lower base which holds a drive unit 18 having a main motor 15, a reduction gear, a brake, a clutch unit 18d, and the like, and is locked to the outer tub 11. Reference numeral 15a denotes a motor shaft which engages with the pulley 16 and transmits the rotation of the motor to the pulley 18c on the drive unit 18 side by the belt 17. 1
Reference numeral 8a denotes a rotor blade shaft protruding from the drive unit, and 18b denotes a washing tub shaft. 19 is a seal portion, 21 is a drain hole, and a drain valve 2
1a, a portion for draining by the drain hose 22. 2
5 is a water supply hose for supplying tap water. Numeral 30 denotes a washing and dewatering tub (basket) made of a stainless steel plate. As shown in FIG. 2, an upper ring portion 31 to which a plastic balance ring 40 in which a fluid is sealed is attached, and a convex portion 32a for improving a cleaning effect. It has a three-part configuration comprising a body 32 having an inner peripheral surface 32b and a dewatering hole 32c, and a dish-shaped bottom plate 33 to which a flange 42 as a reinforcing bottom plate connected to the clutch 18d is attached to the bottom surface. More specifically, on the circumferential surface of the body portion 32, a large number of round-shaped convex portions 32a and oval-shaped convex portions 32b protrude inward, alternately, or every two or three. Further, a large number of dewatering holes (burring holes) 32c are extruded and opened between the protrusions on the circumferential surface. As shown in FIG.
After one stainless steel plate is rolled with a roll machine, it is bent and crimped 32d to form a cylindrical shape.

As shown in FIG. 3 and FIG.
Has the shape of a dish or a basin forming the bottom of the basket 30, and has a hole 30a in the middle bottom. Furthermore, on the lowermost surface 33a of the bottom plate portion 33 that has fallen in a star shape,
A flange 42 as a reinforcing bottom plate for connecting the basket 30 to the clutch portion 18d is mounted and fixed. The fixing method is a method of screwing with a pierce nut 33b previously driven into the lowermost surface of the bottom plate portion 33. In order to prevent the washing effect from being lowered due to the clothes rotating around when the stirring blade 13 rotates in the forward and reverse directions, several convex portions 30c that are pushed inward are provided on the outer peripheral bottom portion that is one step higher.

As shown in FIGS. 5 and 6, the upper ring 3
1 forms the upper part of the basket 30, and the upper part is the opening 3
A balance ring 40 is attached to the outside of the opening 31a as shown in FIG.

As described above, the bottom plate 33 and the body 32, and the upper ring 31 and the body 32 are crimped and crimped over the entire circumference, thereby forming the basket 30 made of stainless steel. FIGS. 8 and 9 show details of the crimped crimping portion 33c of the bottom plate portion 33 and the body portion 32 and the crimped crimping portion 31b of the upper ring portion 31 and the body portion 32.

The thickness of the bottom plate portion 33 to which the stress is applied most is made as thick as 1-1.5 mm, and the thickness of the body portion 32 is made 0.6 mm.
Set the thickness of the upper ring portion 31 to which the stress is not applied most to 0.
There is a thickness difference of 3 mm and 3 persons. However, this is only one example, and the plate thickness of the upper ring portion 31 and the body portion 32 may be the same.

Further, as the material, a stainless steel material containing Ti (titanium), which is excellent in deep drawability, stretch formability and corrosion resistance, is adopted to make it easy to process.

The crimping and crimping connection between the body 32 and the bottom plate 33 will now be described in more detail.

As shown in FIG. 8, an annular body-side folded piece 32 'is provided on the outer periphery of the lower end side of the body portion 32 so as to be folded up so as to rise outward. This body side folded piece 3
A substantially U-shaped groove is formed between 2 'and the outer periphery on the lower end side of the body portion 32.

At the upper end of the bottom plate 33, there is provided an annular flange 33-1 projecting outward. The flange 33-1 is formed substantially horizontally.

An annular bottom plate-side rising piece 33-2 is provided at the outer peripheral end of the flange 33-1. A bottom plate-side hanging piece 33-3 is provided which is folded back from the upper end of the bottom plate-side rising piece 33-2 inward. A substantially inverted U-shaped groove is formed by the bottom plate-side lower piece 33-3 and the bottom plate-side rising piece 33-2.

The body-side folded piece 32 'is fitted into an inverted U-shaped groove in the bottom plate 33. Similarly, the bottom plate-side hanging piece 33-3 is fitted into a U-shaped groove in the body 32. Then, the bottom plate portion 33 is folded by pressing the bottom plate portion-side rising piece 33-2 against the outer periphery of the body portion 32 by crimping.
And the body 32 are fastened.

Such a crimp crimping has the following advantages.

[0020] Welding of a stainless steel plate is more difficult than welding a normal steel plate, and rust and the like are easily generated due to a change in the material due to welding. It is suitable for mass production because it is not difficult, and since the material does not change due to the crimping, it does not generate rust and is suitable for a washing and dewatering tub of a washing machine using water.

Alternatively, a flange 33-1 protruding in the outer peripheral direction is provided at the upper end of the bottom plate 33 in the vicinity of the crimping crimping portion, so that the strength of the dish-shaped bottom plate can be increased to increase the speed. Suitable for a rotating washing and dewatering tub.

Further, the bottom plate portion 33 is thicker than the body portion 32 so as to be strong. Since the riser piece 33-2 of the thicker and weaker bottom plate 33 is configured to be bent and crimped so as to surround the outer peripheral side of the body 32 from the outer peripheral side, it is more durable.

Further, since the crimping crimping is configured to be folded so as to be pressed against the outer periphery of the lower end side of the body 32, the amount of the crimping crimping protruding to the outer periphery of the body 32 is a little. The washing and dewatering tub 30
And the gap between the water receiving tank 4 can be closed. For this reason, the capacity of the washing and dewatering tub 30 can be increased,
In the case of the type in which the washing water is stored in the water receiving tub 4, the washing water can also be saved.

[0024]

As described above, the present invention provides a water receiving tank,
A washing and dewatering tub having a dehydration hole in a peripheral wall, and a rotating blade disposed in the center of the bottom of the washing and dehydration tub, wherein the washing and dehydration tub is formed of a stainless steel plate. In a dehydration washing machine having a dish-shaped bottom plate and a dish-shaped bottom plate formed of a stainless steel plate having a thickness greater than that of the stainless steel plate of the trunk, a substantially U-shaped groove is formed around the lower end of the trunk. An annular body-side folded piece that rises outward so as to be formed, an annular flange protruding to the outer peripheral side at the upper end of the bottom plate, and an annular bottom plate at the outer peripheral end of the flange. It has an annular bottom plate side hanging piece that is folded back so as to hang down from the upper end of the bottom plate side rising piece, and the bottom plate side hanging piece and the bottom plate side rising piece. A substantially U-shaped groove formed therebetween; Said barrel portion side folded piece shaped groove, the bottom plate portion depending member is incorporated fitted in the U-shaped groove,
And it is folded so as to be pressed against the outer periphery at the lower end side of the trunk portion, and is formed so as to surround the lower end side of the trunk portion from the outer periphery with the bottom plate side rising piece from the outer periphery. A dewatering washing machine characterized in that the bottom plate is fastened.

According to this configuration, the following advantages can be expected.

(1) Compared with a plastic washing and dewatering tub, the tank has a large capacity, is durable, and has little mold generation.

(2) Since the bottom plate portion and the body portion are crimped and crimped without welding, rust does not occur.

(3) Since a flange is provided on the bottom plate and the bottom plate is thickened and crimped around the outer periphery at the rising portion of the bottom plate, the structure is more robust.

(4) Since the seam fold is folded so as to be pressed against the outer periphery of the washing and dewatering tub, the gap with the water receiving tub is closed, and the capacity of the washing and dewatering tub can be increased.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional view of a main part of one embodiment of the present invention.

FIG. 3 is a plan view of a bottom plate portion of the present invention.

FIG. 4 is a vertical sectional view of a bottom plate of the present invention.

FIG. 5 is a plan view of an upper ring portion of the present invention.

FIG. 6 is a vertical sectional view of an upper ring portion of the present invention.

FIG. 7 is a vertical crimping cross-sectional view of the trunk plate of the present invention.

FIG. 8 is a crimped sectional view of a bottom plate and a body plate of the present invention.

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

[Description of Signs] 30 ... basket, 31 ... upper ring part, 32 ... trunk part, 3
32a: round convex portion, 32b: oval convex portion, 32d: crimped crimping portion of upper ring and body plate, 33c: crimped crimping portion of body plate and bottom plate, 33: bottom plate portion, 40 ... Balance ring.

Claims (1)

(57) [Claims] A washing and dewatering tub disposed in the water receiving tub and having a dehydration hole in a peripheral wall; and a rotating blade disposed in the center of the bottom of the washing and dewatering tub. A water tub is a dehydration washing machine having a cylindrical body formed of a stainless steel plate and a dish-shaped bottom plate formed of a stainless steel plate having a greater thickness than the stainless steel plate of the body, wherein a lower end side of the body is provided. In the periphery, an annular body-side folded piece that rises outward so as to form a substantially U-shaped groove is provided. An annular flange protruding to the outer peripheral side is provided at an upper end of the bottom plate. A bottom plate-side hanging piece that has an annular bottom plate-side rising piece at the outer peripheral end of the portion, and has an annular bottom plate-side hanging piece that is folded back inward from the upper end of this bottom plate-side rising piece; And the bottom plate portion side standing piece is formed substantially oppositely. The inverted U-shaped groove is fitted with the body-side folded piece, the bottom plate-side hanging piece is fitted into the U-shaped groove, and the lower end side outer periphery of the body The body and the bottom plate are fastened by a crimping crimping connection formed so that the lower end of the body is folded from the outer periphery with the bottom plate-side rising piece while being pressed against the body. Dehydration washing machine characterized.