JP3172406B2 - Fully automatic 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 fully automatic washing machine.

[0002]

2. Description of the Related Art Washing water is circulated through a circulation path provided on an inner wall of a washing and dewatering tub by utilizing a pump-up action of a back blade of a stirring blade, and lint is collected and washing water is jetted. In the case of the structure, the circulation path should be
Except for the spout, it was in a sealed state.

[0003]

However, in the above configuration, when the size of the circulation path increases, water and residual water contained in the laundry during dehydration stagnates in the circulation path, which becomes unbalanced. As a result, the problem of increasing the secondary resonance vibration was found.

[0004] It is an object of the present invention is to eliminate the drawbacks mentioned above, negative
To provide an automatic washing machine can be smoothly dehydration started regardless load volume of large and small.

[0005]

The above object can be attained by providing drain holes at upper and lower portions of the side wall of the washing and dewatering tub constituting the circulation path, substantially above and below the center.

[0006] That is, the washing water which has entered the circulation passage after starting the dehydration is pressed against the side wall of the washing and dewatering tank by centrifugal force attempts to stagnation in the circulating passage, washing and constituting the circulation path de Since the water is drained out of the washing and dewatering tub through drain holes provided above and below the center of the side wall of the water tub, occurrence of a large imbalance can be prevented.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the basic structure of a fully automatic washing machine.

Reference numeral 1 denotes an outer frame made of a substantially box-shaped steel plate including an internal mechanism, 2 denotes a washing and dewatering tub made of stainless steel and has a substantially cylindrical shape with a bottom, and a large number of dehydration holes 2a are formed in a side wall. A hollow annular upper balancer 3 and a lower balancer 4 having a fluid filled in the upper and lower portions are provided, and a rotatable stirring blade 5 is disposed in the center of the bottom portion.

6 is a washing and dewatering tub 2 rotatably contained therein.
A substantially cylindrical outer tub with a bottom for receiving washing water, and a drive unit mounted on the bottom through a steel plate center base 8, and a concave spherical surface holding an anti-vibration device 9 on the outer wall of the outer tub 6. Of the outer tub is supported by a vibration isolator 9 from a concave spherical corner plate 1a fixed to the upper four corners of the outer frame 1.

A synthetic resin tub cover 7 is fixed to the upper end opening to prevent the laundry from dropping into the gap between the outer tub 6 and the washing and dewatering tub 2.

The anti-vibration device 9 includes a suspension rod 9a, an anti-vibration spring 9b,
It comprises a sliding cylinder 9c, a spring receiver 9d, a hanging rod holder 9e, and the like.

A suspending rod holder 9e having a convex spherical surface is fixed to the upper end of the suspending rod 9a, and the retainer 9e fits into the concave spherical surface of the corner plate 10.

The sliding cylinder 9c has a convex spherical surface which fits into the concave spherical surface of the hanging rod receiver 6a, and has therein an anti-vibration spring 9b and a spring receiver 9d. 9b expands and contracts, and the spring receiver 9d vibrates while rubbing the inner surface of the sliding cylinder 9c.

The driving unit includes a motor 10, a clutch 11, a V-belt 12, and the like. The rotation of the motor 10 is transmitted to the clutch 1 via a motor pulley 13, a V-belt 12, and a P-pulley 14.
Transmit to 1.

The clutch 11 has a clutch spring mechanism for switching between washing and spinning, a reduction gear, and the like.
1a and a dehydrating shaft 11b.

A stirring blade 5 is fixed to the washing shaft 11a, and a washing and dewatering tub 2 is fixed to the dehydrating shaft 11b via a flange 15. During washing, the washing and dehydrating tub 2 is rotated via an internal reduction gear and the washing shaft 11a. In addition to transmitting the force to the stirring blade 5, the spinning is transmitted to the washing and dewatering tub 2 by the dehydrating shaft 11b without the intervention of the reduction gear at the time of dehydration, thereby performing dehydration.

The drain device comprises a drain valve 16 and a drain hose 17. One end of the drain valve 16 is bonded to a drain port 6b provided at the bottom of the outer tank 6, and the other end is connected to a drain hose 1
7 is connected. The other end of the drain hose 17 is drawn out of the machine through the drain hose outlet 30.

The water level is detected by a water level sensor 20 via an air tube 19 from an air trap 6c provided in the outer tank 6.

Reference numeral 21 denotes a water supply solenoid valve, one end of which is connected to a faucet via a water supply hose, and the other end of which is connected to a water inlet 22.

Reference numeral 23 denotes an upper surface cover having a panel box portion, in which a control unit 24 as a control unit, a water level sensor 20 for controlling a water level, a power switch 25, an input switch unit 26, a progress display unit 27 and the like are housed. Have been.

The panel box section 28 is provided at two places, a front side and a rear side, and has a front panel 29 and a back panel 30 mounted thereon, respectively.

The top cover 23 is provided with an opening 23a for putting clothes and a lid 31 for opening and closing the opening 23a.
It is configured so as to cover the upper opening of the outer frame 1.

The above is the overall configuration.

Next, the washing and dewatering tub 2 will be described in detail with reference to FIG.

The washing and dewatering tub 2 is composed of stainless steel plates for the body plate 41 and the bottom plate 42, respectively.

The cylinder plate 41 is formed a plate in a ring shape, is fixed to an end portion at goby folding crimping is provided a number of UVA over <br/> annular dewatering holes 2a suited outside .

The bottom plate 42 has a substantially disk shape.
The outer peripheral portion of the end portion and the outer peripheral portion of the lower end of the body plate 41 are goby folded and tightened 2
b.

The upper end of the body plate 41 is formed into a curl shape, and a small-diameter portion 41a is provided to increase the section modulus.

The upper balancer 3 has a skirt 3
a, and fitted to the small diameter portion 41a of the
Fix with.

By providing the small diameter portion 41a, the outer diameter of the skirt portion 3a is substantially the same as the outer diameter of the central portion of the body plate 41,
The gap (about 15 mm) with the inner peripheral surface of the outer tub 6 is not reduced.

The lower balancer 4 is provided so as to be included in the bottom plate 42, and is fixed from below the bottom plate 42 with screws 44.

The washing and dewatering tub 2 is fixed to the dewatering shaft 11b at the center lower portion of the bottom plate 42 with a flange 15 having a fitting hole for the dewatering shaft 11b and a screw 45.

A plurality of back blades 5 a are integrally provided on the back side of the stirring blade 5, and a circulation path cover 48 is provided on the inner peripheral side wall surface of the washing and dewatering tub 2, and a washing water circulation path 47 is provided. Is formed.

The circulation path cover 48 has a height up to the upper part of the wall surface of the washing and dewatering tub 2, and the lower part thereof is provided with a water introduction opening 49 opposed to the outer periphery of the back blade 5a.

A discharge port 50 is provided at an upper portion of the circulation path cover 48 toward the inside of the washing and dewatering tub 2.

A net 51 for collecting lint is detachably attached to the discharge port 50. In the case where a plurality of circulation paths 47 are provided, a circulation path for ejecting the washing liquid is also provided.

During washing, when the stirring blade makes one rotation, the washing water is pushed out to the water introduction opening 49 by the centrifugal pump action of the back blade, and is ejected from the discharge port 50 through the circulation path 47.

Reference numerals 52 and 53 denote burring-shaped drain holes provided in the circulation path 47. This is because the water and the residual water contained in the laundry at the start of the spin-drying are prevented from entering the circulation path 47 and becoming unbalanced to amplify the secondary resonance amplitude. Drain holes are provided at the top and bottom with the center as the border.

The burring is used in order to prevent the lint and the like from being caught.

The upper drainage hole 52 is effective when the dewatering start-up characteristic under a small load is good, and the lower drainage hole 53 is effective when the dehydration start-up characteristic is moderate when the load is more than middle capacity. It is for working. As a result, smooth dehydration activation can be performed. The drain hole is 5mm in diameter
Since the washing water that has been stagnant if Kere several set things degree exits, there is little impact on the circulation water.

[0042]

As described above, according to the present invention, the magnitude of the load is small.
Large engagement without washing water into the circulation path at the time of dehydration start-up is stagnant
Since a large imbalance does not occur , a smooth dehydration start can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a washing machine according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a washing and dewatering tub according to one embodiment of the present invention.

[Explanation of symbols]

 52: Upper drain hole, 53: Lower drain hole.

Continuation of the front page (72) Inventor Tamotsu Kamori 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Pref. Hitachi, Ltd. Electrical Appliances Division, Taga Headquarters (56) References JP-A-4-285595 (JP, A JP-A-7-47192 (JP, A) JP-A-5-60488 (JP, U) JP-A-63-150686 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 39/08 331 D06F 39/12

Claims (2)

(57) [Claims] 1. An outer frame and a hanging vibration-isolated support in the outer frame.
Outer tub, washing and dewatering rotatably contained in the outer tub
A washing tub and a washing / dewatering tub that is rotatably disposed at the center of the bottom.
Circulating through the agitating blades and part of the inner peripheral wall of the washing and dewatering tub
A washing water circulation path formed by arranging a road cover,
The lower part of the washing water circulation path faces the outer periphery of the back blade of the stirring blade.
To provide a water introduction opening, and a discharge port at the top
It provided inwardly of the tank, by using the pumping action of the rear vanes of the stirring blades, the washing water or the water guide openings
From the outlet through the washing water circuit.
A fully automatic washing machine to discharge into the water tank, characterized in that a substantially water drain hole center than at the top and bottom of the side wall of the washing and dewatering tank to said circulation path cover facing the washing water circulation path And a fully automatic washing machine. 2. A fully automatic washing machine according to claim 1, wherein said drain hole is formed in a burring shape.