JPH06304381A - Fully automatic washing machine and vibration preventer therefor - Google Patents

Abstract

PURPOSE:To check a water bath for oscillating at the start of dewatering or when a sudden braking is applied to an automatically washing machine in which a water bath is provided inside an outer box while a dewatering tank provided inside the water tank and the water bath is supported on the outer box with a hoisting device. CONSTITUTION:A plurality of vibration preventers each of which has a buffer body comprising an elastic member provided with a sliding member sliding relatively in the circumferential direction for the outer circumferential surface of a water bath 14 are arranged in the perimeter of the water bath 14. The vibration preventers 32 are interposed between the water bath 14 and the outer box 12 in such a manner that the buffer body of each vibration preventer is precompressed to press the sliding member onto the outer circumferential surface of the water bath 14 based on a resilience thereof.

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 and a vibration isolator for the fully automatic washing machine.

[0002]

2. Description of the Related Art FIG. 8 shows the structure of a conventional fully automatic washing machine. In the figure, 100 is an outer box of the fully automatic washing machine. A water tank 102 is provided inside the outer box 100, and a dehydration tank 104 is further provided inside the water tank 102. A large number of dehydration holes 106 are formed on the peripheral wall of the dehydration tank 104, and a fluid balancer 108 is provided at the upper end thereof. The fluid balancer 108 is a hollow ring-shaped body filled with a predetermined amount of liquid such as salt water having a large specific gravity.

A motor 112 as a drive source is provided at the bottom of the water tank 102, and the driving force from the motor 112 is applied to the dehydration tank 10.
4. A drive mechanism section 114 is provided which is provided with a clutch for transmitting or disconnecting to and from a stirring blade 113 provided therein and a brake for suddenly stopping the dehydration tub 104 rotating at high speed. Further, a drain pipe 116 for draining water in the water tank 102 is connected to the bottom of the water tank 102.

The water tank 102 is weight-supported by a suspension device 120 attached to a support portion 118 at the upper end of the outer box 100. The suspension device 120 includes a suspension rod 122, a cup-shaped body 124 made of polyamide resin or the like, and a rubber fixed to the lower end of the suspension rod 122 and slidably fitted to the inner peripheral surface of the cup-shaped body 124. Friction sliding contact member 126 including
And a spring 128 that springs the spring downward.

In this suspension device 120, the vertical vibration of the water tank 102 causes the elastic deformation of the spring 128 and the friction sliding contact member 1.
It acts to absorb or damp based on relative sliding between 26 and the cup-shaped body 124.

[0006]

In the case of the conventional fully automatic washing machine described above, the vertical vibration of the water tank 102 is well absorbed by the suspension device 120. However, when the water tank 102 vibrates in the horizontal direction, there is a problem that the vibration is not sufficiently absorbed or suppressed.

Therefore, when the laundry is dehydrated by rotating the dehydration tub 104 with the water in the water tub 102 being drained, if the laundry is unevenly distributed in the dehydration tub 104, the water tub 102 swings largely at the time of starting dehydration. This causes a problem of exercising and hitting the outer box 100. Alternatively, the dehydration tank 104 rotating at high speed
When the vehicle is suddenly braked and stopped, the water tank 102 that receives the reaction force makes a large swinging motion and hits the outer box 100, which causes a problem that noise is generated.

In order to prevent this, a large gap is conventionally provided between the water tank 102 and the outer case 100. However, this causes a problem that the washing machine becomes large and the occupied floor area becomes large.

[0009]

The present invention has been made to solve such a problem, and its gist is to provide a water tank inside the outer box and a dehydration tank inside the water tank. In a fully automatic washing machine in which the water tank is supported by an outer box together with the dehydration tank by a suspension device, a buffer body made of or containing an elastic member is provided on the outer peripheral surface of the water tank and / or the inner box of the outer box. A plurality of anti-vibration devices, which are provided with sliding members that relatively slide in the circumferential direction relative to the peripheral surface, are arranged around the water tank, and the shock absorbers of the anti-vibration devices are in a pre-compressed state. The anti-vibration device is interposed between the water tank and the outer case in a state where the sliding member is pressed against the outer peripheral surface of the water tank and / or the inner peripheral surface of the outer case based on the force of generation. is there.

[0010]

As described above, according to the present invention, a plurality of anti-vibration devices each having a cushioning body capable of compressing and elastically deforming and a sliding member are arranged around a water tank, and the cushioning body is pre-compressed. According to the present invention, the vibration proof device disposed around the water tank and the outer box when the water tank tries to make a large swinging motion at the time of dehydration start or when the dehydration suddenly stops. Strictly speaking, the shock absorber of the anti-vibration device located on the side where the water tank approaches the outer box compresses the sliding member in the circumferential direction relative to the outer peripheral surface of the water tank or the inner peripheral surface of the outer box. It elastically deforms and absorbs energy, suppressing swinging of the aquarium.

As a result, the swinging motion of the water tank can be effectively reduced, and the gap between the outer box and the water tank can be reduced. Therefore, according to the present invention, the water tank can be formed large under the same floor area, and the washing machine capacity can be increased. Alternatively, it is possible to reduce the size of the outer box while maintaining the same capacity and reduce the floor occupying area.

In the present invention, since the vibration isolator is interposed between the outer box and the water tub, the water tub may shake a lot even when the laundry is significantly deviated in the dehydration tub. Even if this happens, you can prevent it from hitting the outer box directly. As a result, it is possible to prevent the generation of a direct collision sound between the water tank and the outer box.

In the present invention, the vibration isolator is interposed between the outer box and the water tank in a pre-compressed state. Therefore, by properly selecting the pre-compression amount, the water tank can be removed from the outside. In the vibration damping device located on the side away from the box, it is possible to prevent the sliding member from moving away from the outer peripheral surface of the water tank or the inner peripheral surface of the outer box.

If the sliding member is separated from the outer peripheral surface of the water tank or the inner peripheral surface of the outer box, the contact sound may be generated when the outer peripheral surface of the water tank or the inner peripheral surface of the outer box comes into contact with the sliding member. According to this, such a defect can be prevented.

The spring characteristic of the shock absorber in the vibration isolator has a spring force (restoring force) as the amount of compressive deformation increases.
It is desirable to make the spring characteristic non-linear so as to increase. With this configuration, vibration of the water tank can be well absorbed by the vibration isolator during steady operation, and the vibration of the water tank can be well suppressed from being transmitted to the outer box.On the other hand, when a large swing force acts on the water tank, the shock absorber In this, it is possible to accept this satisfactorily and softly.

In the present invention, a plurality of vibration isolation devices are arranged around the water tank. It is desirable that the arrangement position is symmetrical with respect to the center of the water tank, but even if it is not necessarily symmetrical, each vibration isolation device is placed in a balanced manner so that the center of the water tank coincides with the rotation center of the dehydration tank. It should be done.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings. In FIG. 1, 10 is a fully automatic washing machine, 12 is an outer box having a flat rectangular shape, and 14 and 16 are a water tank and a dewatering tank arranged therein.

Reference numeral 18 denotes a dehydration hole provided in the dehydration tank 16, 2
0 is a fluid balancer, 22 is a stirring blade, 24 is a motor provided at the bottom of the water tank 14, 26 is a drive mechanism part, 28
Is a drainage pipe for draining water.

Reference numeral 30 is a support portion provided on the outer box 12, and 3
Reference numeral 1 is a suspension device having an upper end attached to the support portion 30. Each of these constituent members has the same structure as that of the above-described conventional fully automatic washing machine, and therefore detailed description thereof is omitted here.

A total of four anti-vibration devices 3 are provided around the water tank 14.
2 are arranged. Specifically, the vibration isolator 32 is provided between the outer case 12 and the water tank 14 at an intermediate position on each of the four sides of the outer case 12.

FIG. 2 shows the shape (free shape) of the vibration isolator 32 before attachment. As shown in the figure, this vibration isolator 32 has a mounting plate 34 that serves as a mounting portion to the inner peripheral surface of the outer box 12, and a contact plate 36 as a sliding member that serves as a contact portion to the outer peripheral surface of the water tank 14. is doing. Here, the contact plate 36 is made of a polyamide resin having excellent slipperiness and abrasion resistance, and the mounting plate 34 is also made of a polyamide resin.

A pair of rubber elastic bodies 38 are arranged between the mounting plate 34 and the contact plate 36 so as to form a V shape, and are bonded (vulcanized and bonded) to them at each fixing portion 40. There is.

The rubber elastic body 38 is erected by a standing portion 42 which is erected substantially perpendicularly to the mounting plate 34 and the contact plate 36 from the fixing portion 40.
And a main body portion 44 that extends obliquely and connects them, and has a substantially uniform thickness except for the fixing portion 40.

The height (the dimension between the inner surfaces of the mounting plate 34 and the contact plate 36) l ₁ of the rubber elastic body 38 is set to 45 mm, and the mounting plate 34 and the contact plate of the main body 44 of the rubber elastic body 38 are set. The inclination angle θ with respect to the direction parallel to 36 is about 50 °.

Further, the length and width dimensions l ₂ , l ₃ , l ₄ , l ₅ of the contact plate 36 and the mounting plate 34 are 80 mm, 100 mm, respectively.
It is set to 40 mm and 50 mm.

In FIG. 3A, the vibration isolator 38 is installed in the outer box 12.
It shows the state of being mounted between the water tank 14 and the water tank 14. As shown in the figure, the vibration isolator 32 is mounted with the rubber elastic body 38 pre-compressed. At this time, in the rubber elastic body 38, the inclination angle θ ′ of the main body 44 is smaller than that in the free state. That is, the shape is more horizontal.

In the fully automatic washing machine 10 of the present embodiment equipped with the vibration isolator 32, when the laundry is stored in the dehydration tub 16 and is dehydrated, if there is a deviation in the laundry, the water tub 14 Is trying to shake his head.

However, at this time, the water tank 14 is replaced by the outer box 1.
The rubber elastic body 38 of the vibration isolator 32 positioned on the side closer to 2 slides the contact plate 36 relative to the water tank 14 and, as shown in FIG. Elastically deforms.

In the process, a part of the main body 44 hits the mounting plate 34 to increase the resistance force against the subsequent elastic deformation, and the supporting force for the horizontal load of the water tank 14 is increased while the swing motion of the water tank 14 is adjusted. It elastically deforms and absorbs energy. That is, the shake of the water tank 14 is suppressed.

As described above, in the vibration isolator 32 of this embodiment, the spring force of the rubber elastic body 38 is initially weak (small deformation area), and the vibration of the water tank 14 becomes large to some extent (large deformation area). The spring characteristic is designed to be non-linear so as to increase.

FIG. 4 shows the spring characteristic thereof, in which the rubber elastic body 44 is soft in the small deformation region, and the deformation resistance of the rubber elastic body 44 increases in the middle.

On the other hand, in the vibration isolator 32 in which the water tank 14 is located on the side opposite to the side closer to the outer box 12, the water tank 14 moves relatively in the direction away from the contact plate 36. Since 32 is mounted in a pre-compressed state in advance, the contact plate 36 does not follow the movement of the water tank 14 in the direction of separation and does not cause a gap therebetween. The amount of pre-compression is predetermined as such.

As a result, when the water tank 14 returns to the original position again or relatively moves in the opposite direction, the trouble that the water tank 14 and the contact plate 36 of the vibration isolator 32 collide with each other to generate a sound does not occur. That is, in the case of this example, each vibration isolator 32 cooperates to hold the water tank 14 from the surroundings and suppress the swing motion thereof.

When the dehydrating tub 16 rotating at a high speed is suddenly stopped by a brake, the shaking motion of the water tub 14 may occur similarly. Good control of movement.

The anti-vibration device 32 includes an outer box 12 and a water tank 14.
Since it is interposed between the outer box 12 and the water tank 14,
Avoid direct collision with and prevent the generation of hit sound.

On the other hand, during steady operation of washing and dehydration, each vibration isolator 32 is in the state shown in FIG. 3A, and the water tank 1 is mainly caused by the shear elastic deformation of the main body 44.
The vibration of No. 4 is softly absorbed, and the vibration transmission from the water tank 14 to the outer box 12 is suppressed well.

As described above, in the washing machine 10 of this embodiment, the swinging motion of the water tub 14 is suppressed well. As a result, it is possible to reduce the gap between the outer box 12 and the water tank 14, which makes it possible to increase the size of the water tank 14 while keeping the occupied floor area the same, as is clear from the comparison between FIGS. As a result, it is possible to increase the washing capacity, or, as is clear from the comparison between (a) and (c), the outer case 12 can be downsized under the same capacity, and the occupied floor area can be reduced.

FIG. 6 (B) shows the results of a vibration test carried out with the vibration isolator 32 attached. In this experiment, as shown in FIG. 6 (A), the plate 34 is placed on the upper end of the water tank 14 and the recording paper 36 is attached thereto, while the plate 38 is placed on the upper end of the outer box 12 so as to face downward. Attach the pen 40 and press it against the recording paper 36,
In this state, the weight is unevenly distributed in the dehydration tank 16, dehydration is started, and the trajectory drawn by the pen tip is examined.

However, (B) in the figure (B) shows the test result in a state where the weight is unevenly distributed without mounting the vibration isolator 32 and the imbalance is caused, and (B) shows the state where there is no imbalance. Shows the test results of. In addition, (c) to (f) show test results when imbalance is caused in a state where the vibration isolator 32 is attached.

Among these, (c) shows the test results when the rubber elastic body 38 is a rubber having a rubber hardness of 40 degrees in the spring hardness test specified in JIS K6301.

Further, (d) shows the test results when a rubber having a rubber hardness of 25 degrees is used.

From the above results, it can be seen that by providing the vibration isolator 32, the swinging of the water tank 14 can be effectively suppressed.

FIG. 7 shows another example of the vibration isolator. In FIG. 7A, the vibration isolator 50 has a cushioning member 52 made of a block-shaped sponge body on the upper surface of a polyamide resin plate. 54 is an example in which the contact plate 58 and the mounting plate 60 are provided.
An example in which a metal coil spring 62 is mounted between the above and the vibration damping device 56 is shown. Here, the metal coil spring 62
Has a non-linear spring characteristic.

Although the embodiment of the present invention has been described in detail above, this is merely an example. For example, in the present invention, the vibration isolator may be fixedly provided on the side of the water tank, and the sliding member may be pressed so as to be slidable relative to the inner peripheral surface of the outer box. In some cases, a separate supporting means supports the vibration damping device, and the vibration damping device is provided with sliding members that slide relative to the outer peripheral surface of the water tank and the inner peripheral surface of the outer box, respectively. It is also possible to contact the inner peripheral surface of the outer box in a pressed state. Further, the members of the contact plate and the mounting plate are not limited to polyamide, and other resins can be used. Alternatively, the rubber elastic body may be directly attached to the outer box without the attachment plate.

Further, it is also possible to use, as a shock absorber in the vibration isolator, a bag-like rubber elastic body in which liquid is enclosed to enhance the damper function, and further a metal spring and a liquid-filled damper are combined. It is also possible to configure an anti-vibration device. Besides, the present invention can be configured in a form in which various modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a diagram of a fully automatic washing machine that is an embodiment of the present invention.

FIG. 2 is a diagram showing a shape of the vibration isolation device of FIG. 1 before being mounted.

FIG. 3 is a view showing a state in which the vibration isolator is mounted and its action.

FIG. 4 is a diagram showing a spring characteristic of a rubber elastic body in the vibration isolator.

FIG. 5 is an explanatory diagram of advantages of the fully automatic washing machine of FIG. 1.

FIG. 6 is a diagram showing a test method and test results for confirming the effect of the vibration isolator in FIGS. 1 to 3.

FIG. 7 is a diagram showing another example of the form of a vibration isolator.

FIG. 8 is a view of a conventional fully automatic washing machine.

[Explanation of symbols]

 10 Fully automatic washing machine 12 Outer box 14 Water tank 16 Dehydration tank 31 Lifting device 32, 50, 56 Anti-vibration device 34, 60 Mounting plate 36, 54, 58 Contact plate 38 Rubber elastic body 52 Buffer body 62 Metal coil spring

Claims (2)

[Claims] 1. An elastic member in a fully automatic washing machine, wherein a water tank is provided inside the outer box, a dehydration tank is provided inside the water tank, and the water tank is supported together with the dehydration tank by an outer box by a suspension device. A vibration-damping device is provided around the water tank, the shock-absorbing device being provided with a sliding member that relatively slides in the circumferential direction with respect to the outer peripheral surface of the water tank and / or the inner peripheral surface of the outer box. In a state in which the shock absorbing body of the vibration isolator is in a pre-compressed state and the sliding member is pressed against the outer peripheral surface of the water tank and / or the inner peripheral surface of the outer box based on the elastic force thereof. A fully automatic washing machine in which the vibration isolator is provided between the water tank and the outer box. 2. A fully automatic washing machine comprising a water tub provided inside an outer box, a dehydration tub provided inside the water tub, and the water tub supported together with the dehydration tub by an outer box by a suspension device. A vibration-damping device interposed between a box and a water tank, wherein a shock absorber made of or containing an elastic member is provided in a circumferential direction with respect to the outer peripheral surface of the water tank and / or the inner peripheral surface of the outer box. An anti-vibration device for a fully automatic washing machine, characterized in that a sliding member that slides relative to each other is provided.