JPH078677A - Vibration-isolating device for automatic washing machine - Google Patents

Abstract

PURPOSE:To provide a vibration-isolating device for an automatic washing machine, which reduces a centrifugal whirling at the time of the start of a dehydration without increasing the vibration or noise at the time of a steady dehydration. CONSTITUTION:An external tank 15 is supported by a suspension 20a to isolate the vibration from a main body 22 of a washing machine. At the same time, a suspension rod 21 which constitutes the suspension 20a is extended to form a supporting rod 21a. Then a frictional band 23 is spanned between the supporting rod 21a and external tank 15. By this method, a force with the opposite phase to a force by which the external tank 15 shakes the suspension 20a is generated at the leading end of the supporting rod 21a, and the frictional band stops the movement of the external tank 15 by utilizing this force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device used in a household automatic washing machine.

[0002]

2. Description of the Related Art Conventionally, an automatic washing machine of this type has a structure as shown in FIGS. That is, a washing tub 1 (hereinafter referred to as a washing tub) which also serves as a dehydrating tub is provided with a stirring blade 13 at the center bottom thereof, and an outer tub 3 for receiving water at the time of dehydration is provided outside the washing tub 1. The agitating blade 13 and the drive motor 4 for the washing tub 1 are attached to the outer tub 3.
Further, in this state, the outer tub 3 is suspended from the main body 2 of the washing machine via the anti-vibration support 5 composed of a spring and an attenuator, and is anti-vibration supported. A fluid balancer 6 containing a liquid is fixed to the upper part of the washing tub 1. Further, on the outer circumference of the outer tub 3, there is provided a damper 7 that damps lateral vibrations by attaching two friction bands 14. Both ends of each of the friction bands 14 constituting the attenuator 7 are attached to the main body 2 via elastic bodies 8 formed by bending a wire rod. Further, the friction band 14 is provided with a coil spring 9 near the middle thereof so that it can be expanded and contracted.

The conventional automatic washing machine described above operates as follows. That is, first, water is supplied to the washing tub 1, and the stirring blade 13 is driven to wash the clothes. When the washing process is completed, the water is drained, and then the washing tub 1 is rotated at high speed to centrifugally dehydrate the washed clothes. During this dehydration process,
Unbalanced vibration of the outer tub 3 caused by the uneven displacement of the washed clothes is absorbed by the anti-vibration support 5 and is not transmitted to the main body 2 so much. However, during activation of the dehydration process, when the rotation speed of the washing tub 1 passes through the resonance frequency of the anti-vibration support system, the outer tub 3 swings largely, and in the worst case, the outer tub 3 hits the main body 2. It will also be. In order to minimize the whirling at the time of this resonance,
The attenuator 7 is installed in the outer tub 3. That is,
When the outer tub 3 swings largely, the friction band 14 forming the attenuator 7 causes friction with the outer tub 3, and the whirling of the outer tub 3 is suppressed by this friction loss. .

[0004]

However, in the above-mentioned conventional structure, even when the washing tub 1 is started in the dehydration process and the number of revolutions reaches a steady state, the washing tub 1 is placed between the outer tub 3 and the attenuator 7. Since the frictional force acts, the vibration of the outer tub 3 is transmitted to the main body 2. In order to prevent the outer tank 3 from colliding with the main body 2 by reducing the whirling at the time of starting dehydration, the attenuator 7
The greater the frictional force between the outer tank 3 and the outer tank 3, the better. Further, the attenuator 7 is attached to the upper portion of the outer tub 3 where the gap between the outer tub 3 and the main body 2 is relatively small and there are many chances of collision, so that the effect is greater. However, both of these two methods lead to an increase in vibration of the main body 2 during steady dehydration. That is, increasing the frictional force means increasing the vibration transmitted to the main body 2, and attaching the attenuator 7 to the upper portion of the outer tub 3 facilitates the transmission of the vibration to the upper portion of the main body 2 As a result, the lateral runout of the upper part of is increased.

That is, the conventional structure has a problem that, when the whirling vibration of the outer tub 3 at the time of starting the dehydration is suppressed, the vibration and noise at the normal dehydration become large.

[0006] The present invention is to solve the problems that the above-mentioned conventional structure has, and it is possible to reduce whirling vibration at the time of starting dehydration without increasing vibration and noise during steady dehydration. The purpose is to obtain a vibration isolator for a machine.

[0007]

[Means for Solving the Problems] A first means of the present invention for achieving the above object is to provide an outer tub located outside a washing tub which also serves as a dehydrating tub and receiving water at the time of dewatering. A suspension for supporting the tub from the main body of the washing machine in a vibration-proof manner, a hemispherical suspension rod support stand provided at the upper four corners of the main body and through which suspension rods constituting the suspension are inserted, and a spherical slide is performed on the suspension rod support stand. Anti-vibration device for automatic washing machine, which comprises a hanging bar support, a supporting bar formed by extending the hanging bar to the upper part of the hanging bar support, and a friction band hung between the supporting bar and the outer tub. It is what

A second means of the present invention is an anti-vibration device for an automatic washing machine, in which an elastic body is provided between a support rod and an outer tub in place of the friction band of the first means.

A third means of the present invention is an anti-vibration device for an automatic washing machine, wherein a plurality of elastic bodies of the second means are provided.

A fourth means of the present invention is an anti-vibration device for an automatic washing machine, which is provided with an auxiliary rod, at least one of which is rotatable, between the support rod and the outer tub, instead of the friction band of the first means. It is a thing.

Further, a fifth means of the present invention is an automatic washing machine in which, instead of the friction band of the first means, an auxiliary bar is provided between the support bar and the outer tub, at least one of which is rotatable via a damping mechanism. It is to be an anti-vibration device.

A sixth means of the present invention is an outer tub located outside the washing tub which also serves as a dehydrating tub, for receiving water at the time of dehydration,
A suspension for supporting the outer tub from the main body of the washing machine in a vibration-proof manner, a hemispherical suspension rod support base provided at the upper four corners of the main body and through which suspension rods constituting the suspension are inserted, and a spherical slide on the suspension rod support base. A suspending rod support that moves, a supporting rod formed by extending the suspending rod to an upper part of the suspending rod support, and an anti-vibration device for an automatic washing machine having an elastic body between the supporting rod and the main body. To do.

A seventh means of the present invention is a vibration isolating device for an automatic washing machine, wherein the support bar of the second means is bent toward the center of the outer tub, and an elastic body is provided between the support bar and the outer tub. To do.

The eighth means of the present invention is an outer tub located outside the washing tub which also functions as a dehydrating tub, for receiving water at the time of dehydration.
A suspension for supporting the outer tub from the main body of the washing machine in a vibration-proof manner, a hemispherical suspension rod support base provided at the upper four corners of the main body and through which suspension rods constituting the suspension are inserted, and a spherical slide on the suspension rod support base. Anti-vibration of an automatic washing machine including a moving suspension rod support portion, an attachment portion made of an elastic body integrated with the suspension rod support portion, and an elastic body attached to the outer periphery of an outer tub connected to the attachment portion. It is a device.

[0015]

According to the first means of the present invention, the friction band acts so as to reduce the movement of the outer tank both when the dehydration is started and when the dehydration is steady. That is, since the force of the outer tank to shake the suspension acts on the suspension rod support portion as a fulcrum, a force in the opposite direction to this force is generated at the tip of the support rod. This force has a phase opposite to the vibration of the upper part of the outer tank,
The friction band acts as a force to stop the movement of the outer tank and acts on the outer tank.

The second means of the present invention is that the elastic body acts so as to reduce the movement of the outer tank both at the time of starting dehydration and at the time of steady dehydration. That is, when the washing tub swirls immediately after the start of dehydration, the force generated in the tip of the support rod in the opposite direction to the force for shaking the suspension acts on the outer tub as a force for stopping the movement of the outer tub through the elastic body. Further, when the washing tub starts to rotate during the dehydration process and the vertical vibration at the resonance point is generated, the elastic body generates a force in the vertical direction to reduce the vibration of the outer tub. Further, even when the dehydration is stationary, the force generated in the tip of the support rod in the opposite direction to the force for shaking the suspension acts on the outer tank as a force for stopping the movement of the outer tank through the elastic body.

According to the third means of the present invention, the plurality of elastic bodies between the outer tub and the main body act effectively against the vibration mode of the main body, particularly when the dehydration is steady, and further reduce the vibration of the main body. It acts as if to do.

In the fourth means of the present invention, the auxiliary rod between the support rod and the outer tank acts so as to amplify the force generated in the support rod. The vibration can be effectively suppressed.

In the fifth means of the present invention, the auxiliary rod via the rotatable damping mechanism between the support rod and the outer tub effectively suppresses the vibration of the outer tub during the dehydration start-up and during the steady dehydration. It works like this. Particularly, with respect to the vertical vibration when starting dehydration and passing through the resonance point, the rotatable damping mechanism acts so as to suppress the vertical vibration.

Further, in the sixth means of the present invention, the elastic body between the support rod and the main body causes a force in the opposite direction to the force generated at the tip of the support rod to shake the suspension, thereby stopping the movement of the outer tank. It works like this.

The seventh means of the present invention is that the elastic body connecting the support rod and the outer tub stops the movement of the outer tub by receiving a force in the direction opposite to the force generated at the tip of the support rod to shake the suspension. To act on.

In the eighth means of the present invention, the elastic body mounted between the mounting portion made of an elastic body of the suspension rod support and the outer periphery of the outer tub is opposite to the force generated at the tip of the support rod to shake the suspension. It acts so as to stop the movement of the outer tub by receiving a directional force.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the first means of the present invention will be described below with reference to FIGS. An outer tub 15 for receiving water at the time of dehydration is provided outside the washing tub 18 which also serves as a dehydration tub. At the bottom of the outer tub 15, the speed reducer 1
6 is stuck. This speed reducer 16 is similar to the outer tank 15
Is connected to the motor 17 fixed to the lower part of the belt by a belt. The drive shaft of the speed reducer 16 has a double structure, and a washing tub 18 provided inside the outer tub 15 is fixed to the outer shaft. A stirring blade 19 provided inside the washing tub 18 is fixed to the inner shaft.

The automatic washing machine of this embodiment is equipped with the following vibration isolator. The outer tub 15 is vibration-isolated and supported by the suspension support portion 15a from the four corners of the main body 22 of the washing machine through the suspensions 20a to 20d. Each of the suspensions 20a to 20d includes a suspension rod 21 that supports the outer tank 15 from the four corners of the main body 22, a spring support plate 30 having a friction material on the outer periphery attached to the lower end of the suspension rod 21, and the suspension rod 21. And a compression spring 29 interposed between the spring support plate 30 and the spring retainer 28. Further, a hemispherical suspension rod support 24 and a suspension rod support portion 25 that slides spherically on the suspension rod support 24 attached to the suspension rod 21 are provided at the upper four corners of the main body 22. A reinforcing plate 27 is provided between the hanging rod support 24 and the main body 22 to reinforce the main body 22 from vibration of the suspension 20a during dehydration. On the upper part of the hemispherical suspension rod support portion 25, the suspension rod 21 is extended to form a support rod 21a, and a friction band 23 is stretched between the support rod 21a and the outer tub 15. In this embodiment, the friction band 23 is made of an elastic material such as rubber or urethane. The friction band 23 is fixed to the support rod 21a with a fixture 26.

The operation of this embodiment will be described below. Due to the action of the cloth imbalance W, the force due to the whirling motion of the washing tub 18 immediately after the washing tub 18 starts to rotate after entering the dehydration process is applied to the suspension supporting portion 15a against the outer tub 15.
Acts as a force F ₁ for swinging the suspension 20a. This force F ₁ acts on the support rod 21a with the suspension rod support portion 25 that supports the outer tub 15 as a vibration fulcrum. At the end of the support rod 21a, a friction band 2 is formed between the support rod 21a and the outer tank 15.
3 is provided. Therefore, as shown in FIG. 4, a force F _{2 in the} opposite direction to the force F ₁ is applied to the tip of the support rod 21a.
Is occurring. That is, this force F ₂ has a phase opposite to the vibration of the upper portion of the outer tub 15. Therefore, the friction band 23 connecting the end portion of the support rod 21a and the outer tub 15 receives the force F ₂ so as to stop the movement of the outer tub 15.
Act on 5. Therefore, the vibration of the outer tub 15 at the time of starting the dehydration is suppressed, and the dehydration process is quickly started.

When the rotation speed of the washing tub 18 increases and reaches a steady state, the vibration isolator of this embodiment operates as shown in FIG. The outer tank 15 is acted on by the force F ₁ that causes the suspension 20a to swing, similarly to when the dehydration is started. This force F ₁ acts on the hanging rod support portion 25 as a fulcrum, and acts on the hemispherical hanging rod support bases 24 at the four upper corners of the main body 22 as force f ₁ . On the other hand, as described above, the support rod 2
The tip of the 1a, the force F ₁ and the opposite direction of the force F ₂ is generated. This force F ₂ acts on the hemispherical suspension rod support 24 as a force f ₂ . Since the force f ₂ has a direction opposite to that of the force f ₁ , the force f ₀ that finally acts on the main body 22 via the suspension rod support 24 is reduced as in (Equation 1). .

F ₀ = f ₁ −f ₂ (Equation 1) Thus, the present embodiment acts to reduce the vibration transmitted to the main body 22 even when the dehydration is stationary.

As described above, in this embodiment, the friction band 23 suppresses the movement of the outer tub 15 at the start of dehydration, and at the time of steady dehydration, the suspension band 1 is passed through the friction band 23.
A force in the opposite direction to the force that the outer tub 15 receives from the outer tub 15a is shaken from 5a, and these two forces are offset to reduce the vibration transmitted to the main body 22.

Next, the construction of the second embodiment of the present invention will be described with reference to FIGS. 6 and 7. At the upper four corners of the main body 22, a hemispherical suspension rod support base 24 and a suspension rod support part 25 that slides spherically on the suspension rod support base 24 attached to the suspension rod 21 are provided. A suspension rod 21 is extended above the hemispherical suspension rod support portion 25 to form a support rod 21a, and a first spring 31 which is an elastic body 31 is provided between the support rod 21a and the outer tub 15. ing. Other configurations are similar to those of the first embodiment of the present invention.

The operation of this embodiment will be described below. FIG. 4
As described above, the force due to the whirling motion of the washing tub 18 immediately after the washing tub 18 starts rotating in the dehydration process is applied to the suspension supporting portion 15a against the outer tub 15.
Acts as a force F ₁ for swinging the suspension 20a. This force F ₁ acts on the suspension rod 21 with the suspension rod support portion 25 as a fulcrum. Further, in this embodiment, an elastic body 31 connected to the outer tank 15 is provided at the end of the support rod 21a. Therefore, as described in FIG. 4, the support rod 21a
A force F _{2 in the} opposite direction to F ₁ is generated at the tip of. This force F ₂ has a phase opposite to the vibration of the upper part of the outer tub 15 and acts on the elastic body 31. Therefore, the elastic body 31
The outer tank 15 acts so as to stop the movement of the outer tank 15. Therefore, the vibration of the outer tub 15 at the time of starting the dehydration is suppressed, and the dehydration process is quickly started.

Further, the vertical vibration generated in the washing tub 18 when the dehydration process is started and the rotation speed of the washing tub 18 increases and passes the resonance point, the elastic body 31 generates a force in the vertical direction. Therefore, the transmission to the outer tub 15 can be effectively suppressed.

Further, even when the rotation speed of the washing tub 18 rises to reach a steady state, the operation as shown in FIG. 5 described above is performed to reduce the vibration transmitted to the main body 22.
That is, the force F ₁ acting on the outer tub 15 and swinging the suspension 20a acts on the suspension rod support portions 25 as fulcrums, and the force f is exerted on the hemispherical suspension rod support bases 24 at the four upper corners of the main body 22.
_Acts as ₁ . On the other hand the tip of the support rod 21a, the force F ₁ and the opposite direction of the force F ₂ of the outer tub 15 to shake the suspension 20a from the suspension support portion 15a has occurred. This force F ₂ acts on the hemispherical suspension rod support 24 as a force f ₂ . Since this force f ₂ has a direction opposite to that of the force f ₁ , the force f ₀ that finally acts on the main body 22 is reduced as in the above (Equation 1).

As described above, according to this embodiment, the support rod 2
Since 1a and the outer tub 15 are connected by the elastic body 31, not only the same vibration and noise effects as in the embodiment of the first means of the present invention can be obtained, but also the outer tub 15 at the time of starting dehydration. It is possible to provide an anti-vibration device for an automatic washing machine that is highly effective against vertical vibration of

Next, the construction of the third embodiment of the present invention will be described with reference to FIGS. At the upper four corners of the main body 22, a hemispherical suspension rod support base 24 and a suspension rod support part 25 that slides spherically on the suspension rod support base 24 attached to the suspension rod 21 are provided. In addition, the suspension rod 21 is extended above the hemispherical suspension rod support portion 25 to extend the support rod 21a.
A plurality of second springs 32a and 32b, which are elastic bodies, are provided in parallel with the main body 22 between the support rod 21a and the outer tub 15. Other configurations are similar to those of the first embodiment of the present invention.

The operation of this embodiment will be described below. Also in this embodiment, at the time of starting dehydration, the same operation as in FIG. 4 is performed. The whirling motion of the washing tub 18 immediately after entering the dehydration process acts on the outer tub 15 as a force F ₁ for shaking the suspension 20a from the suspension support portion 15a. This force F ₁ acts on the suspension rod support portion 25 as a fulcrum, and a force F _{2 in the} opposite direction to F ₁ acts on the tip of the support rod 21a.
Occurs. Since this force F ₂ has a phase opposite to the vibration of the upper part of the outer tub 15, it acts on the outer tub 15 as a force to stop the movement of the outer tub 15 through the second springs 32a and 32b. As a result, the vibration of the outer tub 15 can be reduced. Further, when the rotation speed of the washing tub 18 increases and passes through the resonance point, the second springs 31a and 32b generate a vertical force to reduce the vibration caused by the vertical vibration generated at this time. It is a thing. Particularly, in this embodiment, since the second springs 31a and 31b are provided, this vertical vibration can be effectively suppressed.

When the rotation speed of the washing tub 18 is increased to be in a steady state, the main body 22 is used as in the above embodiments.
It acts to reduce the vibration transmitted to the.
In this case, since the second springs 31a and 31b are provided, the vibration of the main body 22 is effectively prevented.

Next, the construction of the embodiment of the fourth means of the present invention will be described with reference to FIGS. At the upper four corners of the main body 22, there are provided a hemispherical suspension rod support 24 and a suspension rod support portion 25 mounted on the suspension rod 21 and spherically slid on the suspension rod support 24. Above the hanging rod support portion 25, a supporting rod 21 a obtained by extending the hanging rod 21 and a supporting rod 21
a and the first auxiliary rod 33a, 33 connecting the outer tank 15 and a
b is provided. The first auxiliary rods 33a and 33b have holes 33c at both ends, and a fixing pin 34a provided on the outer tank 15 is provided.
Both ends of 34b are fixed to the outer tub 15 using the holes 33c. The middle portion is fixed to the support rod 21a by using a fixture 26. Also, the first auxiliary rods 33a, 33
b is rotatable in the direction perpendicular to the axis of the support rod 21a and the fixing pin 34. Other configurations are similar to those of the first embodiment of the present invention.

The operation of this embodiment will be described below. The first auxiliary rods 33a and 33b receive a force F _{2 in the} opposite direction of the force F ₁ acting on the outer tub 15 generated at the tip of the support rod 21a, and prevent the movement of the outer tub 15 at the time of starting dehydration. Further, even when the dehydration is stationary, the vibration transmitted to the main body 22 is reduced by the canceling action shown in (Equation 1) as in the above embodiment. In other words, the outer tank 15 is the suspension support portion 15.
The force F ₁ that causes the suspension 20a to swing from a acts on the suspension rod support portion 25 as a fulcrum, and is input to the hemispherical suspension rod support bases 24 at the four upper corners of the main body 22 as force f ₁ . Also the tip of the support rod 21a from the outer tub 15 through the first auxiliary rod 33a, the force F ₁ and the opposite direction of the force F ₂ of the outer tub 15 to shake the suspension 20a from the suspension support portion 21a is generated There is. This force F ₂ is input to the hemispherical hanging rod support 24 as force f ₂ . This force f ₂
Since the direction is opposite to the force f ₁ , the force f ₀ that finally acts on the main body 22 is offset and reduced as shown in (Equation 1).

According to this embodiment, the force generated in the opposite direction is larger than that in the embodiment of the first means of the present invention, and it is possible to further reduce whirling at the time of starting and vibration and noise at the time of steady operation. Is.

Next, the construction of the fifth embodiment of the present invention will be described with reference to FIGS. At the upper four corners of the main body 22, there are provided a hemispherical suspension rod support 24 and a suspension rod support portion 25 mounted on the suspension rod 21 and spherically slid on the suspension rod support 24. In addition, the hemispherical hanging rod support 25
In the upper part of, the suspension rod 21 is extended to form the support rod 21a, and the second auxiliary rods 33a and 33b are provided. One end of each of the second auxiliary rods 33a and 33b has an attenuator 3 provided in the outer tank 15.
It is attached to the outer tank 15 via 5a and 35b.
The attenuators 35a and 35b have a structure in which force acts in the vertical rotation direction. In addition, the second auxiliary rods 33a and 33b
Has a hole 33c at the other end thereof, which is inserted into the support rod 21a and attached by a fixture 26. Therefore, the second auxiliary rods 33a and 33b can rotate in the direction perpendicular to the axis of the support rod 21a. Other configurations are similar to those of the first embodiment of the present invention.

The operation of this embodiment will be described below. The whirling motion of the washing tub 18 immediately after entering the dehydration process is the outer tub 15
On the other hand, it acts as a force F ₁ for swinging the suspension 20a from the suspension support portion 15a. This force F ₁
Acts on the suspension rod support portion 25 as a fulcrum, and at the tip of the support rod 21a, the support rod 21a, the support rod 21a and the outer tank 15 are provided.
Since it is configured whereby a attenuator 35a above the second auxiliary rod 33a, opposing force F ₂ is generated from the F _1. Since this force F ₂ has a phase opposite to the vibration of the upper portion of the outer tub 15, it acts on the outer tub 15 as a force to stop the movement of the outer tub 15 through the second auxiliary rod 33a. Therefore, the vibration of the outer tub 15 immediately after the dehydration process can be reduced. Further, the vertical vibration generated when the number of rotations of the washing tub 18 increases and passes through the resonance point, the second auxiliary bars 33a and 33b generate the vertical vibration.
It can be reduced by generating a vertical force by 5a and 35b. Further, even when the dehydration is stationary, the vibration transmitted to the main body 22 is reduced by the canceling action shown in (Equation 1) as in the above embodiment. That is, the force F ₁ that causes the outer tub 15 to swing the suspension 20a from the suspension support portion 15a acts with the suspension rod support portion 25 as a fulcrum, and acts on the hemispherical suspension rod support bases 24 at the four upper corners of the main body 22. It is input as f ₁ .
Further, at the tip of the support rod 21a, a force F ₁ that causes the outer tub 15 to swing the suspension 20a from the suspension support portion 21a via the second auxiliary rods 33a and 33b from the outer tub 15.
A force F _{2 in the} opposite direction is generated. This force F ₂ is input to the hemispherical hanging rod support 24 as force f ₂ . Since this force f ₂ is opposite in direction to the force f ₁ , the force f ₀ that finally acts on the main body 22 is offset and reduced as shown in (Equation 1).

In particular, the present embodiment acts as a vibration isolator for an automatic washing machine, which has a great effect on vertical vibration of the outer tub 15 at the time of startup.

Next, the configuration of the sixth embodiment of the present invention will be described with reference to FIGS. 14 and 15. At the upper four corners of the main body 22, a hemispherical suspension rod support 24 and a suspension rod support 25 that slides spherically on the suspension rod support 24 attached to the suspension rod 21 are provided. Further, the suspension rod 21 is extended above the suspension rod support portion 25 to form a support rod 21 a, and a third spring 36, which is an elastic body, is provided between the support rod 21 a and the main body 22.
It has a and 36b. Other configurations are similar to those of the first embodiment of the present invention.

The operation of this embodiment will be described below. Dehydration process
The whirling motion of the washing tub 18 immediately after entering the outer tub 15
From the suspension support 15a
Force F to shake the 20a₁Acts as. This force F₁
Acts on the suspension rod support portion 25 as a fulcrum, and the tip of the support rod 21a
At the end, a support rod 21a and a main body 22 are provided as a third elastic body.
Since the connection is made by the springs 36a and 36b, F
₁Force F in the opposite direction to₂Occurs. This force F₂Is the outer tank 1
Since it is in the opposite phase to the vibration of the upper part of 5, the third spring 3
The outer tank 1 serves as a force for stopping the movement of the outer tank 15 through 6a.
Act on 5. Therefore, the shaking of the outer tub 15 immediately after the dehydration process is performed.
The movement can be reduced. Also, the rotation speed of the washing tub 18
The vertical vibration that occurs when rising and passing through the resonance point is
The three springs 36a and 36b generate force in the vertical direction.
Therefore, it can be reduced. Also, when the dehydration is steady
Also, due to the canceling action shown in (Equation 1) as in the above embodiment,
Therefore, the vibration transmitted to the main body 22 is reduced.
It That is, is the outer tank 15 a suspension support portion 15a?
Force F to shake the suspension 20a₁Is a hanging rod support
Acts with the holding part 25 as a fulcrum,
The force f is applied to the spherical suspension rod support 24.₁Is entered as.
In addition, from the main body 22 to the third spring 3 at the tip of the support rod 21a.
Outer tank 15 supports suspension via 6a and 36b
Force F for shaking the suspension 20a from the portion 21a₁When
Force F in the opposite direction₂Is occurring. This force F ₂Is a hemisphere
Force f on the hanging rod support 24 of₂Is entered as. This power
f₂Is the force f₁The book is finally in the opposite direction because
Force f acting on body 22₀Is offset and low as shown in (Equation 1)
Reduced.

Next, the structure of the seventh embodiment of the present invention will be described with reference to FIGS. In this embodiment, the support rod 21a obtained by extending the suspension rod 21 is used as the outer tank 15
Is bent toward the center of the outer tub 15 by an elastic first rubber band 38.
Connected with. Reference numeral 39 denotes a stopper provided at the tip of the support rod 21a so that the first rubber band 38 does not come off. Other configurations are similar to those of the first embodiment of the present invention.

With the above-mentioned structure, the vibration of the main body 22 at the time of dehydration is reduced as in each of the above embodiments. The whirling motion of the washing tub 18 immediately after entering the dehydration process acts on the outer tub 15 as a force F ₁ for shaking the suspension 20a from the suspension support portion 15a. This force F ₁ acts on the suspension rod support portion 25 as a fulcrum, and the support rod 21a and the outer tub 15 are connected to the tip of the support rod 21a by the first rubber band 38 which is an elastic body. A force F _{2 in the} opposite direction of F ₁ is generated. Since this force F ₂ has a phase opposite to the vibration of the upper part of the outer tub 15, the first rubber band 3
It becomes a force to stop the movement of the outer tub 15 through the outer tub 15
Act on. Therefore, the vibration of the outer tub 15 immediately after the dehydration process can be reduced.

Even when the dehydration is stationary,
It is transmitted to the main body 22 by the canceling action shown in the same formula
The generated vibration is reduced. That is, the outer tank 15
From the suspension support portion 15a to the suspension 20
Force F to shake a₁With the suspension rod support 25 as a fulcrum
It acts, and the hemispherical hanging rod support 2 at the upper four corners of the main body 22
4 has force f₁Is entered as. The tip of the support rod 21a
At the end, from the outer tank 15 via the first rubber band 38,
The tank 15 is suspended from the suspension support portion 21a.
Force F for shaking the shaft 20a₁Force F in the opposite direction₂Has occurred
There is. This force F ₂Is applied to the hemispherical suspension rod support 24 with force f.₂
Is entered as. This force f₂Is the force f₁Is the opposite direction
Since it is a pair, the force f that finally acts on the main body 22₀Is (number
It is offset and reduced as shown in 1).

As described above, according to this embodiment, it is possible to reduce the vibration transmitted to the main body 22 at the time of dehydration, and particularly to effectively use the space above the mounting portion of the suspension. is there.

Next, the configuration of the eighth embodiment of the present invention will be described with reference to FIGS. In this embodiment, the mounting portion 25 made of an elastic body is provided integrally with the hanging rod support portion 25. Further, a fixture 41 is provided on the outer periphery of the outer tank 25.
The second rubber band 40, which is an elastic body, is provided between the mounting portion 25 and the fixture 41. Other configurations are similar to those of the seventh embodiment of the present invention.

With the above construction, the vibration of the main body 22 at the time of dehydration is reduced as in the above embodiments. The whirling motion of the washing tub 18 immediately after entering the dehydration process acts on the outer tub 15 as a force F ₁ for shaking the suspension 20a from the suspension support portion 15a. This force F ₁ acts on the suspension rod support portion 25 as a fulcrum, and the support rod 21a and the outer tub 15 are connected to the tip of the support rod 21a by the second rubber band 40 which is an elastic body. A force F _{2 in the} opposite direction of F ₁ is generated. This force F ₂ has a phase opposite to the vibration of the upper portion of the outer tub 15, so that the second rubber band 40
It acts as a force for stopping the movement of the outer tub 15 through the outer tub 15. Therefore, the vibration of the outer tub 15 immediately after the dehydration process can be reduced. Further, even when the dehydration is stationary, the vibration transmitted to the main body 22 is reduced by the canceling action shown in (Equation 1) as in the above embodiment. That is, the force F ₁ that causes the outer tub 15 to swing the suspension 20 a from the suspension support portion 15 a is equal to the suspension rod support portion 25.
Is applied as a fulcrum, and a force f ₁ is input to the hemispherical suspension rod support 24 at the four upper corners of the main body 22. Further, at the tip of the support rod 21a, from the outer tank 15 to the second rubber band 40.
The force F _{2 in the} opposite direction to the force F ₁ that causes the outer tank 15 to swing the suspension 20 a from the suspension support portion 21 a is generated via the. This force F ₂ is input to the hemispherical hanging rod support 24 as force f ₂ . This force f ₂ is the force f
_{Since the} direction is opposite to ₁ , the force f ₀ that finally acts on the main body 22 is offset and reduced as shown in (Equation 1).

As described above, according to this embodiment, not only the vibration transmitted to the main body 22 at the time of dehydration can be reduced, but also the work of attaching the elastic body becomes extremely easy, and the automatic washing machine with high productivity is obtained. The anti-vibration device can be used.

[0052]

The first means of the present invention is to provide an outer tub located outside the washing tub which also serves as a dehydrating tub and receiving water for dehydration, and to support the outer tub with vibration isolation from the main body of the washing machine. A suspension, a hemispherical suspension rod support base provided at the upper four corners of the main body and through which suspension rods constituting the suspension are inserted, a suspension rod support portion that slides spherically on the suspension rod support base, and the suspension rod is suspended. The structure that consists of a support rod extended to the upper part of the rod support part and a friction band hung between this support rod and the outer tank makes it possible to start dehydration without increasing vibration and noise during steady dehydration. The whirling vibration at the time can be reduced.

In addition to the effect of the first means, the second means of the present invention has a structure in which an elastic body is provided between the support rod and the outer tank in place of the friction band, in addition to the effect of the first means. It is also highly effective against vertical vibration.

Further, the third means of the present invention can be a vibration isolator focusing on the vibration mode of the main body, particularly as a structure using a plurality of elastic bodies between the support rod and the outer tub, and particularly large vibration and noise can be generated. It can be reduced.

Further, the fourth means of the present invention has a simple structure in which at least one rotatable auxiliary rod is provided between the support rod and the outer tub, and the vibration and noise during steady-state dehydration are increased. Without doing so, whirling vibration at the time of starting dehydration can be reduced.

The fifth means of the present invention has a constitution in which at least one of the support rod and the outer tub is connected by an auxiliary rod through a damping mechanism in which at least one is rotatable. A great effect can be obtained.

The sixth means of the present invention has a structure in which an elastic body is provided between the support rod and the main body and is particularly excellent in productivity and durability.

In the seventh means of the present invention, particularly, the support rod is bent toward the center of the outer tank, and the elastic body is provided between the support rod and the outer tank. Particularly, the space above the suspension is effectively utilized. It was done.

The eighth means of the present invention comprises a mounting portion made of an elastic body, which is integrated with the suspension rod supporting portion, and an elastic body mounted on the outer circumference of the outer tub connected to the mounting portion. As a result, the productivity of mounting the elastic body can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of an automatic washing machine showing an embodiment of the first means of the present invention.

FIG. 2 is a sectional view of the same side.

FIG. 3 is an enlarged cross-sectional view of a vibration isolation portion of the automatic washing machine.

FIG. 4 is an explanatory diagram illustrating whirling vibrations at the time of startup.

FIG. 5 is an explanatory diagram illustrating vibration during the steady operation.

FIG. 6 is a partial plan view of the automatic washing machine showing the embodiment of the second means of the present invention.

FIG. 7 is an enlarged cross-sectional view of a vibration isolation portion of the automatic washing machine.

FIG. 8 is a partial plan view of the automatic washing machine showing the embodiment of the third means of the present invention.

FIG. 9 is an enlarged cross-sectional view of a vibration isolation portion of the automatic washing machine.

FIG. 10 is a partial plan view of an automatic washing machine showing an embodiment of the fourth means of the present invention.

FIG. 11 is an enlarged cross-sectional view of a vibration isolation portion of the automatic washing machine.

FIG. 12 is a partial plan view of the automatic washing machine showing the embodiment of the fifth means of the present invention.

FIG. 13 is an enlarged cross-sectional view of a vibration isolation portion of the same automatic washing machine.

FIG. 14 is a partial plan view of the automatic washing machine showing the embodiment of the sixth means of the present invention.

FIG. 15 is an enlarged cross-sectional view of a vibration isolation portion of the automatic washing machine.

FIG. 16 is a partial plan view of the automatic washing machine showing the embodiment of the seventh means of the present invention.

FIG. 17 is an enlarged cross-sectional view of a vibration isolation portion of the same automatic washing machine.

FIG. 18 is a plan view of an automatic washing machine showing an embodiment of the eighth means of the present invention.

FIG. 19 is an enlarged cross-sectional view of a vibration isolation portion of the same automatic washing machine.

FIG. 20 is a side sectional view illustrating a conventional automatic washing machine.

FIG. 21 is a plan view of the same.

[Explanation of symbols]

 15 Outer tub 18 Washing tub 20a, 20b, 20c, 20d Suspension 21 Hanging bar 21a, 21b, 21c, 21d Support bar 22 Washing machine body 23 Friction band 24 Hanging bar support 25 Hanging bar support

Claims (8)

[Claims] 1. An outer tub located outside a washing tub that also serves as a dehydrating tub to receive water for dehydration, a suspension for supporting the outer tub from a main body of a washing machine in a vibration-proof manner, and four suspension upper corners of the main body. Provided is a hemispherical suspension rod support through which the suspension rod that constitutes the suspension is inserted, a suspension rod support portion that slides spherically on the suspension rod support base, and the suspension rod is extended to an upper portion of the suspension rod support portion. An anti-vibration device for an automatic washing machine, which includes a support bar formed as described above and a friction band that is stretched between the support bar and the outer tub. 2. An anti-vibration device for an automatic washing machine according to claim 1, wherein an elastic body is provided between the support rod and the outer tub in place of the friction band. 3. An anti-vibration device for an automatic washing machine according to claim 2, wherein a plurality of elastic bodies are provided. 4. An auxiliary rod, at least one of which is rotatable, is provided between the support rod and the outer tub, instead of the friction band.
Anti-vibration device for the described automatic washing machine. 5. An anti-vibration device for an automatic washing machine according to claim 1, wherein at least one of the support rods and the outer tub is provided with an auxiliary rod rotatably through a damping mechanism instead of the friction band. 6. An outer tub located outside the washing tub which also serves as a dehydrating tub to receive water at the time of dehydration, a suspension for supporting the outer tub from the main body of the washing machine in a vibration-proof manner, and at the upper four corners of the main body. Provided is a hemispherical suspension rod support through which the suspension rod that constitutes the suspension is inserted, a suspension rod support portion that slides spherically on the suspension rod support base, and the suspension rod is extended to an upper portion of the suspension rod support portion. And a vibration isolator for an automatic washing machine, wherein an elastic body is provided between the support rod and the main body. 7. The vibration isolator for an automatic washing machine according to claim 2, wherein the support bar is bent toward the center of the outer tub, and an elastic body is provided between the support bar and the outer tub. 8. An outer tub which is located outside the washing tub also serving as a dehydrating tub and receives water at the time of dehydration, a suspension for supporting the outer tub from the main body of the washing machine in a vibration-proof manner, and at the upper four corners of the main body. The suspension rod is provided with a hemispherical suspension rod support through which the suspension rod constituting the suspension is inserted, a suspension rod support portion that slides spherically on the suspension rod support base, and an elastic body integrated with the suspension rod support portion. An anti-vibration device for an automatic washing machine, comprising a mounting portion and an elastic body mounted on the outer periphery of an outer tub connected to the mounting portion.