JP2701755B2 - Dehydration washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a washing and dewatering tub rotatably supported in a water receiving tub and having a rotating blade at the center of the bottom. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehydration washing machine that performs washing with a rotary wing after collecting water, drains the laundry and spins the dehydration tub at a high speed, and performs centrifugal dewatering, and particularly relates to a dehydration tub used in this type of dehydration washing machine.

[0002]

2. Description of the Related Art A conventional washing and dewatering tub is disclosed in Japanese Patent Laid-Open No. 57-2034.
As described in No. 92, most of them are made of plastic. Before the plastic tank was put to practical use, steel plates were also put to practical use.However, steel plates were pressed, integrated by welding, and coated with enamel or the like to prevent rust. Was.

[0003]

The plastic washing and dewatering tub requires an increase in the strength of the tub itself that can withstand high-speed rotation during dehydration.
A rib is stretched around the outer peripheral surface. This allows
If a washing machine has been used for a long time, cleaning residues adhere between the ribs stretched on the outer peripheral surface, mold is generated, and the clothes adhere again. In addition, since the wall thickness is actually increased due to the increase in the wall thickness and the ribs, there is a problem that the inner volume of the washing and dewatering tub is reduced accordingly.

[0004] In addition, steel plates coated with steel have increased the weight of the entire tank, and the recent high-speed dehydration requires an increase in the output of a drive motor, and also causes problems such as rusting over a long period of use. there were.

[0005] It is an object of the present invention to provide a clean washing and dewatering tub corresponding to a large capacity without obviating the above-mentioned disadvantages of the prior art.

Another object of the present invention is to provide a washing and dewatering tub having high strength and high rigidity which can withstand high-speed dehydration.

[0007]

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 / dewatering tub, and a rotary wing provided at the center of the bottom of the washing / dewatering tub, wherein the washing and dewatering tub is more than 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 portion formed of a thick stainless steel plate, an annular trunk portion rising outward so as to form a substantially U-shaped groove around a lower end side of the trunk portion. The bottom plate portion has an annular bottom plate side folded piece that hangs inward so that a substantially inverted U-shaped groove is formed around the upper end side of the bottom plate portion. The body-side folded piece fits in the groove, and the bottom plate-side folded piece fits in the U-shaped groove. It is characterized in that the body and the bottom plate are fastened by a crimping connection formed so as to surround the lower end side outer periphery of the body with the upper end of the bottom plate. .

[0008]

[Function] Since the body of the washing and dewatering tub and the dish-shaped bottom plate are made of stainless steel plate, they have sufficient strength unlike plastic washing and dewatering tubs. For this reason, there is no need to extend a rib on the outer peripheral surface of the tank, and the tank is smooth, and there is no element to which detergent scum adheres and accumulates. In addition, since a sufficient strength can be obtained with a thin plate, the internal volume is correspondingly increased, and the capacity can be increased.

Furthermore, since the bottom plate on which a large bending moment acts due to imbalance during dehydration is made thicker and formed into a dish shape by press working, the strength and rigidity of this part are large and high-speed dehydration is possible. Can be well tolerated. Since the body of the washing and dewatering tub has a cylindrical shape, the overall rigidity is high even when the plate thickness is reduced, so that the weight of the washing and dewatering tub can be reduced.

[0010] Furthermore, since the body and the bottom plate made of stainless steel plate are joined together by crimping without welding, it is suitable for mass production. The material of a stainless steel plate is liable to change and become rusted when it is welded.

[0011] In addition, the seam crimping connection is formed such that the lower end side of the body is surrounded by the thick bottom plate from the outer periphery, so that the body is surrounded by the thin body of the body from the outer periphery. It is more convenient for those that are durable and spin at high speed.

Further, in this crimping connection, the amount of crimping protruding to the outer periphery on the lower end side of the trunk portion 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.

Further, since the body and the bottom plate are joined without using any separate parts, and the two parts are directly bent together, no extra parts for joining are required, and compared with the case where another part is interposed. It is also strong.

[0014]

An 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 into a box shape, and has a hanging bar receiver 1a at four corners at an upper end and four feet 1b at a lower end. 2 is the top cover and outer frame 1
And has a lid 3, a back panel 3a, and a control unit 20. Reference numeral 4 denotes a water receiving tank formed of a plastic molded product, which stores washing water or receives only dehydration by centrifugal dehydration. Reference numeral 4a denotes an air reservoir connected to the air hose 5 and the water level sensor 6, and has a configuration in which the amount of supplied water is replaced with a water level by opening a water supply valve 23 in the tank and controlled. Reference numeral 4b denotes a suspension bar receiver, which is provided with a spring receiver 10,
The spring 9, the spring receiver 10,
The hook part 7a is surrounded by the sliding cylinder 7c, and the upper part has the hanging rod holder 8 which rotates and holds it in the hanging rod receiver 1a. A lower base 14 holds a drive unit 18 having a main motor 15, a reduction gear, a brake, and a clutch unit 18d,
Locked to the outer tub 11. Reference numeral 15a denotes a motor shaft, to which a pulley 16 is fixed at the tip, and a belt 17 transmits the rotation of the motor to a pulley 18c on the driving section 18 side.
Reference numeral 18a denotes a rotor blade shaft protruding downward from the drive unit, and the rotor blade 13 is fixed to the upper end thereof. Reference numeral 18b denotes a dewatering tub shaft, which is fixed to the washing and dewatering tub 30 via a flange 42. 19 is a seal portion, 21 is a drain hole, and a drain valve 21a,
The drain hose 22 drains water. 25 is a water supply hose for supplying tap water. Reference numeral 30 denotes a washing and dewatering tub made of a stainless steel plate. As shown in FIG. 2, an upper ring portion 31 for attaching a plastic balance ring 40 filled with a fluid therein, and a convex portion 32a for improving the cleaning effect.
A flange 4 serving as a reinforcing bottom plate connected to the body 32 having a dehydration hole 32c and a dehydration hole 32c on the inner peripheral surface and the dehydration tub shaft 18b.
2 has a three-part configuration including a dish-shaped bottom plate portion 33 attached to the bottom surface. More specifically, on the circumferential surface of the body portion 32, a large number of rounded convex portions 32a and oval shaped convex portions 32b are extruded inward, alternately, or every two or three. Further, a large number of dehydration holes 32 are provided between the convex portions of the circumferential surface.
c is formed by a burring process that can be pushed out and opened. As shown in FIG. 7, the body 32 itself
After one stainless steel plate is rolled into a cylindrical shape with a roll machine,
It is formed by tightening both ends by bending and crimping A32d.

As shown in FIG. 3 and FIG.
Has the shape of a dish or a basin forming the bottom of the washing and dewatering tub 30, and has a hole 30a in the middle bottom.
Further, a flange 42 is attached and fixed to the lowermost surface 33a of the bottom plate portion 33 that has fallen in a star shape. The fixing method is
It is screwed with a pierce nut 33b previously driven into the lowermost surface of the bottom plate portion 33. In order to prevent the clothes from rotating together and reducing the washing effect when the rotary wing 13 rotates in the forward and reverse directions, several triangular pyramid-shaped protrusions 30c that are pushed inward are provided on the outer peripheral bottom portion that is one step higher.

As shown in FIG. 5 and FIG.
Reference numeral 1 denotes an upper portion of the washing and dewatering tub 30, an upper portion forms an opening 30a, and a ring-like shape which expands outward as it goes down, and a step portion outside the opening 31a as shown in FIG. The balance ring 40 is attached to the.

The washing and dewatering tub 30 made of stainless steel is formed by the above-described operations, in which the bottom plate portion 33 and the body portion 32 and the upper ring portion 31 and the body portion 32 are crimped and crimped over their entire circumferences. Bent crimping portion 33c of bottom plate portion 33 and body portion 32
8 and 9 show details of the crimped crimping portion 31b of the upper ring portion 31 and the body portion 32.

The bottom plate 33 to which the stress is applied most is made as thick as 1 to 1.5 mm, and the body 32 is made as thick as 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.

In the dehydrating washing machine constructed as described above, the laundry and the detergent are put into the washing and dewatering tub 30, a predetermined amount of water is stored in the water receiving tub 4, and the rotating blades 13 are mainly used. The washing is performed by driving with the motor 15. At this time, the convex portions 32a, 32b, 30c provided on the inner surface of the washing and dewatering tub 30 complicate the movement of the laundry and improve the washing effect.

When the washing operation for a predetermined time is performed, the water receiving tank 4
After draining the water, the washing and dewatering tub 30 is driven in one direction to perform centrifugal dewatering. At this time, if the laundry is unevenly distributed in the washing / dewatering tub 30, a large vibration is generated. The amount of unbalance during dehydration exerts a large bending moment on the washing and dewatering tub 30, but in this embodiment, the thickness of the bottom plate 33 of the washing and dewatering tub 30 is 1 to 1.5 mm, which is sufficient strength and rigidity. Therefore, it can sufficiently withstand large vibrations. The body part 32 is fixed to the upper part by the bumper ring 40, and the lower end is connected to the bottom plate part 33. Therefore, even if a large force acts locally, no deformation occurs.
It was confirmed that if the plate thickness of the body portion 32 was about 0.6 mm, it could sufficiently withstand the vibration excitation force during dehydration.

Here, the crimped connection between the body 32 and the bottom plate 33 will be described in detail again.

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

The bottom plate portion 33 has an annular bottom plate-side folded piece 33 'that hangs down so as to form an approximately U-shaped groove 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 a seam crimping connection formed so that the lower end is surrounded by the upper end side of the bottom plate portion 33 from the outer periphery.

In this crimping connection, the connecting portion is located on the outer periphery of the body portion 32, but the amount of protrusion in the outer peripheral direction is small. For this reason, the gap between the washing and dewatering tub 30 and the water receiving tub 4 disposed outside the tub 30 can be made smaller than that of the one having a large amount of protrusion. Since the outer diameter of the washing and dewatering tub 30 can be increased by the amount of reducing the gap, the inner volume of the washing and dewatering tub can be increased.

Alternatively, the crimped connection is formed by enclosing the lower end of the thin body 32 at the upper end side of the thick bottom plate 33 from the outer periphery.
It is more robust than one that surrounds the upper end of the bottom plate portion 33 from the outside at the lower end of the bottom plate.

Stainless steel sheets are more difficult to weld than ordinary steel sheets. In contrast, the crimping connection is
It has good workability and is suitable for mass production. Further, the material of the stainless steel plate is easily changed by welding, and there is a possibility of rusting. The crimped connection does not have such a risk of rusting.

The body 32 and the bottom plate 33 are connected to each other by the bottom plate 33.
The body-side folded piece 32 ′ of the body 32 is inserted into the inverted U-shaped groove of
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 to each other. It is unnecessary and durable.

When another coupling component is interposed, the workability tends to be poor and the structure tends to be weak.

[0031]

As described above, the present invention provides:
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 dehydrating washing machine having a bottom plate portion, an annular body-side folded piece that rises outward so as to form a substantially U-shaped groove is formed around a lower end side of the body portion, and an upper end side of the bottom plate portion The periphery has an annular bottom plate-side folded piece that hangs down so that a substantially inverted U-shaped groove is formed, and the body-side folded piece has the U-shaped groove in the inverted U-shaped groove. The bottom plate-side folded piece is fitted in the shape of a groove, and the lower end side outer periphery of the body is Goby folded by crimping bonds formed so as to surround at the upper side of the plate portion, in dewatering washing machine entered into the bottom plate portion and the body portion.

According to this configuration, there are the following advantages.

(1) Since the body and bottom plate made of stainless steel plate are crimped together instead of welding, they are suitable for mass production and there is no change in the material due to welding. Difficult, suitable for washing machines that use water.

(2) Since the crimping connection is formed such that the lower end side of the body is surrounded from the outer periphery by a thick bottom plate from the outer periphery, the lower end side is surrounded by the thin body from the outer periphery. It has a higher mechanical strength than that of the washing machine, and is suitable for a high-speed dehydrating washing machine.

(3) In the seam crimp connection, the amount of protrusion of the seam crimp 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 tub can be closed accordingly. The capacity of the washing and dewatering tub can be increased.

(4) Since the body and the bottom plate are directly crimped together without using separate parts, no extra parts are required and they are strong.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a dehydration washing machine to which a washing and dehydration tub of the present invention is applied.

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.

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

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

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

FIG. 7 is a vertical crimping sectional view of a trunk.

FIG. 8 is a crimped sectional view of a bottom plate and a trunk.

FIG. 9 is a crimping cross-sectional view of the upper ring portion and the trunk portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outer frame, 4 ... Water receiving tank, 7 ... Hanging rod, 13 ... Rotor blade, 15
... Main motor, 18b ... Dehydration tank shaft, 30 ... Washing and dehydration tank,
32 ... body part, 33 ... bottom plate part, 33c ...
40 ... Balance ring.

Continuation of front page (56) References JP-A-61-249499 (JP, A) JP-A-51-59469 (JP, A) JP-A-57-203492 (JP, A) JP-A-58-1497 (JP, A) JP-A-58-120768 (JP, A) JP-A-49-35170 (JP, U) JP-A-60-15288 (JP, U) JP-A-58-14874 (JP, U) JP-A-58-14874 50-103471 (JP, U) Jiko 41-14853 (JP, Y1) Jiko 49-42929 (JP, Y1)

Claims (3)

(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. A dehydration washing machine having a dish-shaped bottom plate portion, comprising: an annular body-side folded piece that rises outward so as to form a substantially U-shaped groove around a lower end side of the body portion; An annular bottom plate-side folded piece that hangs inward so as to form a substantially inverted U-shaped groove around the upper end side of the bottom plate portion, and the body-side folded piece is formed in the inverted U-shaped groove. The bottom plate-side folded piece is fitted into the U-shaped groove, and The goby folding crimping bonds formed so as to surround the side periphery in the upper side of the bottom plate portion, dehydration washing machine, characterized in that they have entered into the bottom plate portion and the body portion. 2. The dehydrating washing machine according to claim 1, wherein the body has a large number of convex portions projecting inward over substantially the entire circumference of the peripheral wall. 3. The washing machine according to claim 1, further comprising a donut-shaped balance ring above the body.