JP5217673B2 - Washing machine - Google Patents

Description

  The present invention is a laundry for washing, rinsing and dewatering (may be further performed until drying) in a washing and dehydrating tub rotatably disposed in an outer tub elastically supported in the washing machine body. Related to the machine.

Conventionally, this type of washing machine increases the weight of the outer tub in order to suppress a large swinging motion of the outer tub during dehydration activation due to the eccentric load of the laundry (see, for example, Patent Document 1). FIG. 14 shows a configuration of a conventional washing machine described in Patent Document 1. As shown in FIG. 14, the main body 1, the outer tub 3 supported by the suspension 2 in the main body 1, the washing / dehydrating tub 4 rotating around the horizontal axis in the outer tub 3, and the washing / dehydrating tub 4 , A damper 6 provided between the lower part of the outer tub 3 and the main body 1, and a tank 7 for suppressing oscillating motion that is provided in the outer tub 3 and accumulates water according to the degree of vibration. The tank 7 is filled with water at the start of dehydration, and a large rocking motion at the start of dehydration is suppressed by the weight of the water filled in the tank 7.
JP-A-5-131075

  However, the conventional configuration requires a water supply device for filling the tank 7 with water and a drainage device for draining, which is expensive. In addition, piping for water supply and drainage generated noise due to vibration during dehydration. Further, even when the vibration suppression effect is obtained by using the vibration energy of the water without filling the tank 7, the vibration noise of the water in the tank 7 has been a problem. Moreover, when the eccentric load of the laundry is large, it is necessary to enlarge the tank 7 to increase the amount of water, and there is a limit to the eccentric load of the laundry that can be handled in a limited space.

  The present invention solves the above-described conventional problems, and an object thereof is to suppress vibrations efficiently and silently with a simple configuration without increasing the weight of the outer tub.

In order to solve the above-described conventional problems, the washing machine of the present invention includes an upper upper portion that sandwiches an upper mounting plate fixed to the outer tub from above and below an attachment shaft provided at an upper end of a vibration isolating means that supports the outer tub. The upper mounting plate is fixed to the upper mounting plate via an elastic body and an upper lower elastic body, and the lower mounting plate fixed to the bottom of the washing machine outer frame is sandwiched from above and below the mounting shaft provided at the lower end of the vibration isolating means. Attenuating means fixed to the lower mounting plate via a lower upper elastic body and a lower lower elastic body and attenuating the swinging motion of the outer tub to at least one of the upper upper elastic body or the lower lower elastic body the Ru provided. Thereby , the upper upper elastic body or the lower lower elastic body is larger in damping force than the upper lower elastic body or the lower upper elastic body.

  As a result, it is possible to give a damping effect to the support portion of the elastic body effective in suppressing the swinging movement of the outer tub, and to prevent the outer tub from swinging vigorously during the dehydration start due to the eccentric load of the laundry. It can be reliably reduced without increasing the weight.

  The washing machine of the present invention can reduce the swinging motion of the outer tub without increasing the weight of the outer tub, and can efficiently and quietly suppress vibration with a simple configuration.

According to a first aspect of the present invention, there is provided an outer tub provided in the outer frame of the washing machine, a washing and dehydrating tub rotatably provided in the outer tub, the outer tub, and a bottom portion of the outer frame of the washing machine. A plurality of anti-vibration means for supporting the outer tub disposed therebetween, and a driving means for rotating the washing and dewatering tub, wherein the anti-vibration means has an attachment shaft provided at an upper end thereof, The upper mounting plate fixed to the upper mounting plate is fixed to the upper mounting plate via an upper upper elastic body and an upper lower elastic body that sandwich the upper mounting plate from above and below, and the mounting shaft provided at the lower end of the vibration isolating means is connected to the washing machine outer frame. The lower mounting plate is fixed to the lower mounting plate via a lower upper elastic body and a lower lower elastic body that sandwich the lower mounting plate from above and below, respectively, and the outer tank swings on the upper upper elastic body. the Rukoto provided a damping means for damping the movement, the upper upper elastic body, reduced By the force to be greatly than the upper lower elastic member or the lower upper elastic member, it influences the swinging motion of the size of the outer tub not applied load upper upper elastic body or the lower the lower elastic member The return resistance at the time of displacement increases, and the swinging motion of the outer tub can be reliably reduced without increasing the weight of the outer tub.

According to a second aspect of the present invention, an outer tub provided in the outer frame of the washing machine and a rotatable inside the outer tub are provided.
A washing / dehydrating tub, a plurality of vibration isolating means for supporting the outer tub disposed between the outer tub and the bottom of the washing machine outer frame, and a driving means for rotating the washing / dehydrating tub. The anti-vibration means includes an upper upper elastic body and an upper lower elastic body sandwiching an upper mounting plate fixed to the outer tub from above and below, respectively, on the upper mounting plate. The mounting shaft provided at the lower end of the vibration isolating means is fixed via a lower upper elastic body and a lower lower elastic body sandwiching a lower mounting plate fixed to the bottom of the washing machine outer frame from above and below, respectively. The lower lower elastic body is fixed to the lower mounting plate, and the lower lower elastic body is provided with damping means for damping the swinging motion of the outer tub. By making it larger than the side upper elastic body, The return resistance at the time of displacement of the upper upper elastic body or the lower lower elastic body that affects the magnitude of the swinging movement of the outer tank without increasing the weight is increased, so that the outer tank can be reliably connected without increasing the weight of the outer tank. Oscillating motion can be reduced.

According to a third aspect of the invention, in particular, the damping means of the first or second aspect of the invention comprises a flexible hollow bag body that deforms in conjunction with the swinging motion of the outer tub, and the bag body By providing the opening in the support part, the support part having a great effect of suppressing the swinging motion of the outer tub has a damping effect utilizing resistance when the air inside the bag body flows out or flows in from the opening. Therefore, the swinging motion of the outer tub can be effectively reduced with a simple configuration.

According to a fourth aspect of the invention, in particular, the damping means of the first or second aspect of the invention comprises a flexible bag that deforms in conjunction with the rocking motion of the outer tub, and a liquid or liquid is contained inside the bag. By enclosing a highly viscous liquid, the flow resistance generated when the liquid inside the bag body or the highly viscous liquid flows due to the deformation of the bag body acts as a damping force, reducing the large oscillating motion of the outer tub. Can do.

According to a fifth aspect of the invention, in particular, the damping means of the first or second aspect of the invention comprises a flexible bag that deforms in conjunction with the swinging motion of the outer tub, and the gel is formed inside the bag. By enclosing the body, it is possible to increase the damping force using the movement resistance of the internal fluid due to the deformation of the bag body, and it is possible to configure a damping means that is small and has high damping characteristics at low cost.

In the sixth aspect of the invention, in particular, the damping means of the first or second aspect of the invention comprises a solid body having a large damping coefficient that is deformed in conjunction with the rocking motion of the outer tub. Can be increased.

In the seventh invention, in particular, the damping means of any one of the first to third inventions has a damping force varying means for changing the damping force, and the damping force varying means is provided on a part of the bag body. By providing a spout for ejecting the gas inside the bag body and an opening / closing means for opening and closing the spout, the damping force of the damping means can be changed according to the magnitude of the swinging motion of the outer tub. The vibration of the outer frame of the washing machine and the noise generated by the vibration can be reduced from the start of dehydration to the steady state.

In the eighth aspect of the invention, in particular, the damping force varying means of the seventh aspect of the invention changes the damping force in accordance with the magnitude of the vibration of the outer tub, thereby increasing the damping force when the vibration of the outer tub is large. However, by making the others weak and optimizing the vibration transmission of the damping means, the swinging motion of the outer tub and the vibration of the washing machine outer frame can be minimized.

In the ninth aspect of the invention, in particular, the damping force varying means of the seventh aspect of the invention increases the damping force at the time of resonance of the outer tub by changing the damping force according to the frequency of the outer tub. By weakening and optimizing the vibration transmission of the damping means, it is possible to minimize the swinging motion of the outer tub at the start of dehydration and the vibration of the washing machine outer frame during steady dehydration.

In the tenth aspect of the invention, in particular, the damping force varying means of the seventh aspect of the invention reduces the large swinging movement of the outer tub caused by the movement of the laundry by making the damping force at the time of washing stronger than at the time of dehydration. Thus, the outer tub can be prevented from contacting or colliding with the outer frame of the washing machine.

In the eleventh aspect of the invention, in particular, the damping means according to any one of the first to tenth inventions can be configured in the outer frame of the washing machine by providing the upper upper elastic body. Therefore, reliability can be improved.

First and second invention, in particular, the damping means of any one invention of the first to tenth, and the upper upper elastic member, by providing both lower the lower elastic member, to double the damping force And the effect of reducing the rocking motion of the outer tub can be enhanced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of the washing machine according to the first embodiment of the present invention. In FIG. 1, in order to support the outer tub 33 in the washing machine outer frame 30, one tension spring 31 and two vibration isolating means 32 are provided between the outer tub bottom 33a and the washing machine outer frame bottom 30a. ing. The anti-vibration means 32 includes an elastic body 32a and a compression spring 32b, and elastically supports the outer tub 33.

  The anti-vibration means 32 has two upper upper elastic bodies 42 and upper lower elastic bodies for buffering in which the mounting shaft 32c extending to the upper end side sandwiches the upper mounting plate 41 fixed to the outer tank bottom 33a from above and below, respectively. An attachment shaft 32d that passes through the body 43 and is screwed to the upper attachment plate 41 and extends to the lower end side of the vibration isolating means 32 causes the lower attachment plate 44 fixed to the bottom 30a of the washing machine outer frame to be viewed from above and below. The two lower upper elastic bodies 45 and the lower lower elastic bodies 46 for buffering are sandwiched between the lower mounting plate 44 and screwed.

  At least one of the upper upper elastic body 42 and the lower lower elastic body 46 is provided with a damping means 47 that attenuates the swinging motion of the outer tub 33, and the damping means 47 has a return resistance at the time of displacement of the upper lower elastic body 43 or the lower elastic body 46. The upper upper elastic body 42 or the lower lower elastic body 46 is larger than the side upper elastic body 45, and the material thereof is butyl rubber having a low rebound characteristic with a restitution coefficient of 0.6. For other elastic bodies, inexpensive chloroprene rubber is used.

  The washing / dehydrating tub 34 is rotatably disposed in the outer tub 33, and the rotating shaft 34a is inclined upward. The inclination angle is set to 20 to 30 ° in consideration of operability when putting in and out the laundry, and the inclination angle is maintained by the tension spring 31. The motor (driving means) 35 is composed of a brushless DC motor and is controlled by an inverter so that the rotational speed can be freely changed. Then, the washing / dehydrating tub 34 is directly driven. The water supply means 36 supplies water into the washing / dehydrating tub 34. The water level detection means 37 detects the washing water level in the outer basket 33. The drainage means 38 drains the washing water in the outer tub 33.

  The control device 39 is provided at the lower front portion of the washing machine outer frame 30. The control device 39 sequentially controls each step of washing, rinsing and dehydration based on the setting contents inputted by the operation display means 40 provided on the upper front surface of the washing machine outer frame 30. The power switching means (FIG. The motor 35, the water supply means 36, the drainage means 38, etc. are sequentially controlled via a not-shown).

About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, after putting laundry and detergent into the washing and dewatering tub 34, the operation display means 40 is operated to start operation. As a result, the water supply means 36 operates, the washing water is supplied into the washing / dehydrating tub 34, and the washing / dehydrating tub 34 also starts rotating. When the specified amount of washing water is supplied, the water supply means 36 stops water supply. By the rotation of the washing and dewatering tub 34, the detergent is dissolved in the washing water and becomes a washing liquid and penetrates into the clothes.

  The washing and dewatering tub 34 rotates at a low speed of about 30 r / min, and performs washing for a specified time to lift and drop the laundry. After the washing is finished, the drainage means 38 is operated, and the washing liquid in which the dirt is dissolved is drained out of the outer tub 33. After the drainage is completed, the rotation of the washing and dewatering tank 34 is gradually increased. In the absence of the attenuating means 47, the outer tub 33 swings greatly as it approaches resonance. The swinging motion of the outer tub 33 is transmitted to the washing machine outer frame 30 through the flexible window packing 49, and the washing machine outer frame 30 vibrates greatly or generates noise.

  When the outer tub 33 swings, the upper upper elastic body 42, the upper lower elastic body 43, the lower upper elastic body 45, and the lower lower elastic body 46 are greatly deformed via the vibration isolation means 32. Further, the swinging motion of the outer tub 33 tends to deform the elastic body into various shapes, but the return resistance from the displacement of the outer tub 33 is higher than the upper lower elastic body 43 or the lower upper elastic body 45. Since the elastic body 42 or the lower lower elastic body 46 is made larger, the movement of the outer tub 33 is suppressed.

  By providing the damping means 47, the damping action acts on the outer tub 33 via the vibration isolating means 32, and a large oscillating motion at the time of resonance is reduced. Thereafter, the number of rotations of the motor 35 is increased to a specified value, and the dehydration process is completed. Thus, the dehydration process can proceed smoothly with less swinging motion at the start of dehydration.

  As described above, in the present embodiment, the swinging motion of the outer tub 33 can be reliably reduced without increasing the weight of the outer tub 33. Further, the magnitude of the eccentric load of the laundry can be dealt with by increasing the shape of the upper upper elastic body 42 or the lower lower elastic body 46 of the damping means 47 to increase the damping force, thereby efficiently and silently vibrating. Performance can be improved. Moreover, since the weight of the outer tank 33 is not applied to the upper upper elastic body 42 or the lower lower elastic body 46 of the damping means 47, no permanent deformation or sag occurs, and stable vibration-proof performance is provided. You can also.

(Embodiment 2)
Next, a washing machine according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view showing the vibration isolating means of the washing machine in the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the structure which carries out the same effect | action as FIG. 1, and the thing of Embodiment 1 is used for concrete description.

  The difference from the first embodiment is that the damping means 47 is a hollow bag body 50 using a rubber such as flexible chloroprene rubber which is deformed in conjunction with the swinging motion of the outer tub 33, and It is the place comprised by the opening part 50a which connects the inside and the exterior which were provided in this bag body 50, and is provided in cyclic | annular form around the attachment shaft 32d.

  The upper upper elastic body 42 or the lower lower elastic body 46 of the damping means 47 is not subjected to the weight of the outer tub 33, so that the bag body 50 using rubber such as chloroprene rubber is not permanently deformed or damaged. , Can maintain stable anti-vibration performance. Other configurations are the same as those of the first embodiment.

  When the outer tub 33 swings, the bag body 50 is greatly deformed through the vibration isolation means 32 and the volume of the air chamber 50b changes. When the volume decreases, the air in the air chamber 50b is released from the opening 50a, and is sucked when the volume returns to the original state. The resistance force generated by this air flow becomes the damping force of the damping means 47. By providing the damping means 47, the damping action acts on the outer tub 33 via the vibration isolating means 32, and a large oscillating motion at the time of resonance is reduced.

  In this way, a damping effect using the resistance when the air inside the bag body 50 flows out or flows in from the opening 50a is given to the support portion that is more effective in suppressing the swinging motion of the outer tub 33. The swing motion of the outer tub 33 can be effectively reduced with a simple configuration.

(Embodiment 3)
Next, a washing machine according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view showing the vibration isolating means of the washing machine according to the third embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the structure which carries out the same effect | action as FIG. 1, and the thing of Embodiment 1 is used for concrete description.

  The difference from the first embodiment is that the damping means 47 includes a bag 50 using rubber such as flexible chloroprene rubber that deforms in conjunction with the magnitude of the swinging motion of the outer tub 33, and the bag 50. Is formed of a high-viscosity fluid 50c such as silicon oil, and is annularly provided around the mounting shaft 32d.

  The upper upper elastic body 42 or the lower lower elastic body 46 of the damping means 47 is not subjected to the weight of the outer tub 33, so that the bag body 50 using rubber such as chloroprene rubber is not permanently deformed or damaged. In addition, since the high-viscosity fluid 50c does not flow out, stable vibration isolation performance can be maintained. Other configurations are the same as those of the first embodiment.

  As described above, in the present embodiment, since the high viscosity fluid 50c is sealed in the bag body 50, a damping force is generated due to the flow resistance of the high viscosity fluid 50c when the bag body 50 is deformed. 33 large swing motions can be reduced. Further, the swinging motion of the outer tub 33 is transmitted to the bottom of the washing machine outer frame 30 that has the least influence on the vibration of the washing machine outer frame 30, thereby reducing the large swinging motion of the outer tub 33 and the washing machine outer frame 30. The vibration of can be minimized.

(Embodiment 4)
Next, the washing machine of Embodiment 4 of this invention is demonstrated, referring FIG. FIG. 4 is a cross-sectional view showing the vibration isolating means of the washing machine in the fourth embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the structure which carries out the same effect | action as FIG. 1, and the thing of Embodiment 1 is used for concrete description.

  The difference from the first embodiment is that the damping means 47 includes a bag 50 using rubber such as flexible chloroprene rubber that deforms in conjunction with the magnitude of the swinging motion of the outer tub 33, and the bag 50. Is formed in a ring shape around the mounting shaft 32d.

  The upper upper elastic body 42 or the lower lower elastic body 46 of the damping means 47 is not subjected to the weight of the outer tub 33, so that the bag body 50 using rubber such as chloroprene rubber is not permanently deformed or damaged. Since the gel-like body 50d does not flow out, stable vibration isolation performance can be maintained. Other configurations are the same as those of the first embodiment.

  Since the damping means 47 is composed of the flexible bag body 50 and the gel-like body 50d that are deformed in conjunction with the magnitude of the swinging motion, the large movement resistance of the gel-like body 50d due to the deformation of the bag body 50 is attenuated. The damping means 47 that can be used as a force and has high anti-vibration performance can be configured.

(Embodiment 5)
Next, a washing machine according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view showing the vibration isolator of the washing machine in the fifth embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the structure which carries out the same effect | action as FIG. 1, and the thing of Embodiment 1 is used for concrete description.

  The difference from the first embodiment is that the damping means 47 is constituted by a solid body 46a of butyl rubber having a large damping coefficient that is deformed in conjunction with the magnitude of the swinging motion of the outer tub 33. A ring is provided around the periphery.

  The upper upper elastic body 42 or the lower lower elastic body 46 of the damping means 47 is not subjected to the weight of the outer tub 33, so that the solid body 46a using rubber such as butyl rubber is not permanently deformed or damaged. Stable vibration isolation performance can be maintained. Other configurations are the same as those of the first embodiment. As a result, the damping force can be increased with a simple configuration, and the highly reliable damping means 47 can be provided at low cost.

(Embodiment 6)
Next, a washing machine according to a sixth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a cross-sectional view showing a main part of a washing machine according to the sixth embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the structure which carries out the same effect | action as FIG. 1, and the thing of Embodiment 1 is used for concrete description.

  The difference from the first embodiment is that an opening 50a through which fluid inside the bag body 50 is ejected and a jet outlet 50e through which another fluid is ejected are provided in a part of the bag body 50 of the damping means 47. The damping force varying means 51 is composed of a jet outlet 50e and an opening / closing means 52 for opening and closing the jet outlet 50e, and the opening area of the opening 50a is smaller than the opening area of the jet outlet 50e. . Other configurations are the same as those of the first embodiment.

  At the time of dehydration activation with a large swinging motion of the outer tub 33, the opening / closing means 52 is closed, and the ejection of the fluid is limited only to the opening 50a having a small opening area, thereby increasing the ejection or inflow resistance and increasing the damping force of the damping means 47. At the time of steady dehydration that suppresses the swinging motion of the outer tub 33 and the vibration of the outer tub 33 becomes relatively small, the opening / closing means 52 is opened, and the fluid is ejected or flowed in both the opening 50a and the ejection port 50e, The ejection force or inflow resistance is reduced to weaken the damping force of the damping means 47 to prevent the vibration of the outer tub 33 from being transmitted to the washing machine outer frame 30, resulting from the vibration and vibration of the washing machine outer frame 30. Noise can be reduced.

  Thus, the damping force of the damping means 47 can be changed according to the magnitude of the vibration of the outer tub 33, and the vibration of the washing machine outer frame 30 and the noise generated by the vibration are reduced from the start of dehydration to the steady state. be able to.

(Embodiment 7)
Next, the washing machine of Embodiment 7 of this invention is demonstrated, referring FIG. 7, FIG. FIG. 7 is a cross-sectional view showing the main part of the washing machine according to the seventh embodiment of the present invention, and FIG. 8 is a timing chart showing the operating state of the outer tub amplitude and damping force varying means. In addition, the same code | symbol is attached | subjected about the structure which carries out the same effect | action as FIG. 1, FIG. 6, and the thing of Embodiment 1 and 6 is used for concrete description.

  The difference from the first embodiment is that the opening / closing means 52 is opened and closed by a control device 39 by an electromagnetic opening / closing valve 52a. The vibration detection means 53 is provided between the outer tub bottom 33a and the bottom 30a of the washing machine outer frame. When the outer tub 33 vibrates, the detection rod 54 made of ferrite moves in the coil 55 and the vibration is detected by a change in inductance generated at that time.

The detection signal is sent to the control device 39, and when the vibration exceeding the specified level is detected, the opening / closing means 52 is closed, the internal gas is ejected from the bag 50 only by the opening 50a, and the damping force is increased. In the following vibration, the opening / closing means 52 is opened and the internal gas is ejected from the bag body 50 from both the opening 50a and the ejection port 50e to weaken the damping force. Other configurations are the same as those of the first and sixth embodiments.

As shown in FIG. 8, when the laundry is biased when dehydration is started, the outer tub 33 swings greatly. The vibration detection means 53 detects the vibration of the outer tub 33, closes the opening / closing means 52 of the damping force varying means 51, and causes the internal gas to be ejected from the bag body 50 only to the opening 50a. The opening area of the opening 50a is about 2 mm ² , and the flow resistance of the fluid passing therethrough is large. As a result, the damping force of the damping means 47 is increased. The swinging motion of the outer tub 33 is suppressed because the damping force of the damping means 47 is increased.

  If the damping force remains strong, the vibration of the outer tub 33 is easily transmitted to the washing machine outer frame 30 and the vibration of the washing machine outer frame 30 increases. However, when the vibration of the outer tub 33 is lower than the specified level, it opens and closes. The means 52 is opened, the internal gas is ejected from the bag 50 from both the opening 50a and the ejection port 50e, and the damping force is weakened by reducing the flow resistance of the passing fluid, so that the vibration of the outer tub 33 is washed. It is difficult to be transmitted to the outer frame 30.

  As described above, in the present embodiment, the damping means 47 is provided with the damping force varying means 51 that changes the damping force according to the magnitude of the vibration of the outer tub 33, so that the damping is performed when the vibration of the outer tub 33 is large. By increasing the force and decreasing the others to optimize the vibration transmission of the damping means 47, the swinging motion of the outer tub 33 and the vibration of the washing machine outer frame 30 can be minimized.

(Embodiment 8)
Next, a washing machine according to an eighth embodiment of the present invention will be described with reference to FIGS. FIG. 9 is a cross-sectional view showing the main part of the washing machine in the eighth embodiment of the present invention, and FIG. 10 is a timing chart showing the operating state of the frequency of the outer tub and the damping force varying means. In addition, the same code | symbol is attached | subjected about the structure which carries out the same effect | action as FIG. 1, FIG. 6, and the thing of Embodiment 1 and 6 is used for concrete description.

  The difference from the first embodiment is that the damping means 47 is a damping force varying means comprising an opening 50a through which a fluid inside the bag body 50 is ejected to a part of the bag body 50 and an outlet 50e provided with an opening / closing means 52. 51 is provided. The opening / closing means 52 is an electromagnetic opening / closing valve that is opened and closed by the control device 39. The driving means 35 is provided with a rotation detecting means 56. The rotation detecting unit 56 uses a Hall element and is shared with a rotation sensor that controls the rotation of the driving unit 35.

  The rotation signal of the rotation detecting means 56 is sent to the control device 39, and the rotation number of the washing and dewatering tub 34 is measured. The frequency of the outer tub 33 is calculated from the rotational speed. When the vibration frequency is 7 Hz or less, the opening / closing means 52 of the damping force varying means 51 is closed, the internal gas from the bag 50 is ejected only by the opening 50a to increase the damping force, and when the frequency exceeds 7 Hz, the opening / closing means 52 is opened. The internal gas is ejected from the bag body 50 from both the opening 50a and the ejection port 50e to weaken the damping force. Other configurations are the same as those of the first and sixth embodiments.

  As shown in FIG. 10, at the time of dehydration activation, if the laundry is biased, resonance occurs in which the outer tub 33 swings greatly. This resonance occurs up to a frequency of 7 Hz. Therefore, when the vibration frequency is 7 Hz or less, the opening / closing means 52 is closed, and the internal gas is ejected from the bag body 50 only by the opening 50a to increase the damping force. The swinging motion of the outer tub 33 is suppressed because the damping force of the damping means 47 is increased. If the frequency exceeds 7 Hz, the vibration of the outer tub 33 is reduced because the resonance is passed.

  If the damping force remains strong, the vibration of the outer tub 33 is easily transmitted to the washing machine outer frame 30 and the vibration of the washing machine outer frame 30 increases. However, when the vibration frequency of the outer tub 33 exceeds 7 Hz, the opening / closing means The vibration of the outer tub 33 is hardly transmitted to the washing machine outer frame 30 by opening 52 and causing the internal gas to be ejected from the bag body 50 from both the opening 50a and the ejection port 50e to weaken the damping force.

  As described above, in the present embodiment, the damping means 47 is provided with the damping force varying means 51 that changes the damping force in conjunction with the vibration frequency of the outer tank 33, so that the damping force when the outer tank 33 resonates. The vibration of the outer tub 33 at the start of dehydration and the vibration of the washing machine outer frame 30 at the time of steady dehydration are minimized by optimizing the vibration transmission of the damping means 47 by making the others strong. be able to.

(Embodiment 9)
Next, a washing machine according to a ninth embodiment of the present invention will be described with reference to FIG. FIG. 11 is a timing chart showing the operation state of the vibration of the outer tub and the damping force varying means during washing of the washing machine according to the ninth embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the structure which carries out the same effect | action as FIG. 1, FIG. 6, and the thing of Embodiment 1 and 6 is used for concrete description.

  The difference from the first embodiment is that the damping means 47 has a variable damping force comprising an opening 50a through which a fluid inside the bag body 50 is jetted to a part of the bag body 50 and an outlet 50e provided with an opening / closing means 52. Means 51 are provided. The opening / closing means 52 is an electromagnetic opening / closing valve that is opened and closed by the control device 39. Other configurations are the same as those of the first and sixth embodiments.

  As shown in FIG. 11, during washing, the laundry that has become wet and heavy moves greatly in the washing / dehydrating tub 34, so that the outer tub 33 swings greatly. When the operation display means 40 is operated to start washing, the opening / closing means 52 is closed, the internal gas is ejected from the bag 50 only by the opening 50a, and the damping force is made stronger than in the steady state of dehydration. The swinging motion of the outer tub 33 is suppressed because the damping force of the damping means 47 is increased. Thus, the outer tub 33 can be prevented from contacting or colliding with the washing machine outer frame 30.

(Embodiment 10)
Next, a washing machine according to a tenth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a cross-sectional view showing the vibration isolator of the washing machine in the tenth embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the structure which carries out the same effect | action as FIG. 1, and the thing of Embodiment 1 is used for concrete description.

  The difference from the first embodiment is that the damping means 47 is provided on the upper upper elastic body 42. Other configurations are the same as those of the first embodiment. Thereby, the attenuation means 47 can be comprised in the washing machine outer frame 30, and since it does not receive an external influence, reliability can be improved.

(Embodiment 11)
Next, a washing machine according to an eleventh embodiment of the present invention will be described with reference to FIG. FIG. 13: is sectional drawing which shows the vibration isolator of the washing machine in the 11th Embodiment of this invention. In addition, the same code | symbol is attached | subjected about the structure which carries out the same effect | action as FIG. 1, and the thing of Embodiment 1 is used for concrete description.

  The difference from the first embodiment is that the damping means 47 is provided on both the upper upper elastic body 42 and the lower lower elastic body 46. Other configurations are the same as those of the first embodiment. Thereby, the damping force can be doubled, and the swinging motion of the outer tub 33 can be further reduced.

In the present embodiment, although the operability is improved, the washing / dehydrating tub 34 has a rotating shaft whose front shaft is inclined upward while the swinging motion of the outer tub 33 is increased. The same effect can be obtained with a washing machine.

  As described above, the washing machine according to the present invention can reduce the swinging motion of the outer tub without increasing the weight of the outer tub, and can efficiently and quietly suppress vibration with a simple configuration. So it is useful as a washing machine.

Sectional drawing of the washing machine in Embodiment 1 of this invention Sectional drawing which shows the vibration isolator of the washing machine in Embodiment 2 of this invention Sectional drawing which shows the vibration isolator of the washing machine in Embodiment 3 of this invention Sectional drawing which shows the vibration isolator of the washing machine in Embodiment 4 of this invention Sectional drawing which shows the vibration isolator of the washing machine in Embodiment 5 of this invention Sectional drawing of the principal part of the washing machine in Embodiment 6 of this invention. Sectional drawing of the principal part of the washing machine in Embodiment 7 of this invention. Timing chart showing operating state of amplitude and damping force variable means of outer tub of same washing machine Sectional drawing of the principal part of the washing machine in Embodiment 8 of this invention. Timing chart showing the operating state of the frequency and damping force variable means of the outer tub of the washing machine Timing chart showing vibration of outer tub and operation state of damping force variable means during washing of washing machine in embodiment 9 of the present invention Sectional drawing which shows the vibration isolator of the washing machine in Embodiment 10 of this invention Sectional drawing which shows the vibration isolator of the washing machine in Embodiment 11 of this invention Cross section of a conventional washing machine

30 Washing machine outer frame 30a Washing machine outer frame bottom 32 Anti-vibration means 32c Mounting shaft 32d Mounting shaft 33 Outer tank 33a Outer tank bottom 34 Washing / dehydrating tank 35 Driving means 41 Upper mounting plate 42 Upper upper elastic body 43 Upper lower elasticity Body 44 Lower mounting plate 45 Lower upper elastic body 46 Lower lower elastic body 46a Solid body 47 Damping means 50 Bag body 50a Opening 50c High viscosity fluid 50d Gel body 51 Damping force variable means 52 Opening / closing means

Claims (12)

An outer tub provided in the outer frame of the washing machine;
A washing and dewatering tub provided rotatably inside the outer tub;
A plurality of vibration isolating means for supporting the outer tub disposed between the outer tub and the bottom of the washing machine outer frame;
Driving means for rotating the washing and dewatering tub,
The vibration isolating means is
The mounting shaft provided at the upper end is fixed to the upper mounting plate via an upper upper elastic body and an upper lower elastic body that sandwich the upper mounting plate fixed to the outer tub from above and below, respectively.
The lower side of the mounting shaft provided at the lower end of the vibration isolating means sandwiches the lower mounting plate fixed to the bottom of the outer frame of the washing machine from above and below via the lower upper elastic body and the lower lower elastic body. Fixed to the mounting plate,
The Rukoto provided a damping means for damping the swinging motion of the outer tub to the upper upper elastic member, the upper upper elastic body, greatly than the damping force upper lower elastic member or the lower upper elastic member A washing machine designed to be. An outer tub provided in the outer frame of the washing machine;
A washing and dewatering tub provided rotatably inside the outer tub;
A plurality of vibration isolating means for supporting the outer tub disposed between the outer tub and the bottom of the washing machine outer frame;
Driving means for rotating the washing and dewatering tub,
The vibration isolating means is
The mounting shaft provided at the upper end is fixed to the upper mounting plate via an upper upper elastic body and an upper lower elastic body that sandwich the upper mounting plate fixed to the outer tub from above and below, respectively.
The lower side of the mounting shaft provided at the lower end of the vibration isolating means sandwiches the lower mounting plate fixed to the bottom of the outer frame of the washing machine from above and below via the lower upper elastic body and the lower lower elastic body. Fixed to the mounting plate,
By providing the lower lower elastic body with damping means for damping the swinging motion of the outer tub, the lower lower elastic body has a damping force larger than that of the upper lower elastic body or the lower upper elastic body. A washing machine designed to be. The washing machine according to claim 1 or 2 , wherein the damping means is formed of a flexible hollow bag body that deforms in conjunction with a swinging motion of the outer tub, and an opening is provided in the bag body. . The washing machine according to claim 1 or 2 , wherein the damping means is formed of a flexible bag body that is deformed in conjunction with a swinging motion of the outer tub, and a liquid or a highly viscous liquid is sealed inside the bag body. . The washing machine according to claim 1 or 2 , wherein the damping means is formed of a flexible bag body that is deformed in conjunction with the swinging motion of the outer tub, and a gel-like body is enclosed in the bag body. The washing machine according to claim 1 or 2, wherein the damping means is constituted by a solid body having a large damping coefficient that is deformed in conjunction with the swinging motion of the outer tub. The damping means has a damping force varying means for changing the damping force, and the damping force varying means is an ejection port for ejecting gas inside the bag body to a part of the bag body, and an opening / closing operation for opening and closing the ejection port. The washing machine according to any one of claims 1 to 3, further comprising means. The washing machine according to claim 7 , wherein the damping force varying means changes the damping force according to the magnitude of the vibration of the outer tub. The washing machine according to claim 7 , wherein the damping force varying means changes the damping force in accordance with the frequency of the outer tub. 8. The washing machine according to claim 7 , wherein the damping force varying means makes the damping force during washing stronger than during steady dehydration. The washing machine according to any one of claims 1 to 10 , wherein the damping means is provided on the upper upper elastic body. The washing machine according to any one of claims 1 to 10 , wherein the damping means is provided in both the upper upper elastic body and the lower lower elastic body.

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