JP3136872B2 - Fully automatic washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for countermeasures against abnormal vibration of a fully automatic washing machine for home use.

[0002]

2. Description of the Related Art A conventional fully automatic washing machine responds to abnormal vibration with a structure as shown in FIGS. Reference numeral 1 denotes a dewatering tank, and a flange 2 is attached to a bottom surface. Reference numeral 3 denotes an outer tub provided outside the dehydration tub 1 for receiving water during washing and dehydration. The outer tub 3 is provided with a stirring blade 4 provided in the dehydration tub 1 and a drive motor 5 for driving the dehydration tub 1 itself. The outer tub 3 is supported by a suspension 7 suspended from an upper portion of the main body 6 in a vibration-proof manner. A fluid balancer 1a containing a liquid is fixed to an upper portion of the dehydration tank 1. In the upper portion between the main body 6 and the outer tub 3, when an abnormal vibration occurs due to imbalance of the clothes in the dehydration tub 1 that also serves for washing and dehydration, the safety device 8 detects the abnormal vibration and stops the operation of the dehydration tub 1. Is attached. Furthermore, the main body 6
In order to absorb the vibration of the dewatering tank 1 or to adjust the vibration direction of the water receiving tank 3 in order to make the safety device 8 detect the vibration in the case of abnormal vibration that is too large to absorb the vibration. , Elastic bodies 9a, 9b, 9c are mounted.

With the above configuration, water supply, washing, drainage, and dehydration are automatically performed, and anti-vibration measures and countermeasures against abnormal vibration are performed in these steps.

In general, in a fully automatic washing machine having such a configuration, when the washing process is completed and the dehydration process for rotating the dehydration tub 1 is started, the dehydration tub 1 generated due to entanglement of clothes at the time of washing is removed. Depending on the balance, the outer tub 3 may vibrate horizontally or vertically. Further, when the outer tub 3 is vibrated violently, an abnormal vibration may be generated in which the main body 6 is vibrated greatly together with the abnormal sound, or is moved in a severe case.

In order to prevent the occurrence of such abnormal vibration beforehand, elastic bodies 9a, 9b and 9c are attached to the main body 6 and a safety device 8 is provided. Elastic bodies 9a, 9b, 9
c has a generally rectangular parallelepiped shape as shown in FIG. 13, the material is uniform, and a felt is adhered to the surface. The mounting position and quantity are designed so that the vibration of the outer tub 3 can be easily transmitted to the safety device 8. Have been. These components detect the abnormal vibrations at the beginning of the vibration before the abnormal vibrations shown above vibrate or move the main body 6 together with the abnormal sound by the operation described below. To prevent.

[0006] First, after the washing process is completed and drainage is performed, spin-drying starts. At this time, the dehydration tub 1 is horizontally vibrated at the start of rotation due to imbalance of the dehydration tub 1 caused by entanglement of clothes in the washing process, and the outer tub 3 and the elastic members 9a, 9b, 9c are hit by the vibration. When the vibration is below a certain value, the elastic members 9a, 9b, 9c
As a result, the vibration is absorbed, and the vibration is not transmitted to the main body 6, and the dehydration tub 1 shifts to a steady rotation. When the vibration is equal to or more than a certain value, the vibration of the outer tub 1 is amplified by the elastic bodies 9a, 9b, and 9c, the vibration direction is changed, and the outer tub 3 comes into contact with the safety device 8. The safety device 8 is actuated by this contact, the imbalance of the dewatering tub 1 caused by the entanglement of clothes or the like is corrected, and the dehydration step is set again.

[0007]

However, according to the above configuration, depending on the weight distribution due to the arrangement of the motor 5 and other auxiliary devices under the outer tub 3, the dewatering tub 1 may be unbalanced due to entanglement of clothes or the like. When abnormal vibration occurs, the vibration of the outer tub 3 does not become a substantially concentric vibration, but becomes an elliptical shape in which the outer tub 3 vibrates in one direction.
Although a contact is made with b and 9c, a situation occurs in which the direction of vibration for bringing the outer tub 3 into contact with the safety device 8 cannot be adjusted.
In this case, the safety switch does not operate and the abnormal vibration is left unattended, so that there is a problem that the main body 6 vibrates greatly with an abnormal sound in the dehydration process, or the main body 6 moves when the vibration becomes more severe. Was.

Accordingly, the present invention is to solve the problem of the conventional configuration, and is capable of reliably operating the safety device 8 no matter what kind of abnormal vibration occurs in the outer tub. It is a first object of the present invention to obtain a fully automatic washing machine having a function of preventing abnormal vibration having a simple configuration.

A second object of the present invention is to provide a fully automatic washing machine having a structure in which a safety device works more reliably against abnormal vibration of the outer tub.

[0010]

According to a first aspect of the present invention for achieving the first object, a fully automatic washing machine includes a main body,
An outer tub containing a dehydration tub that also serves as a washing tub, and a suspension that elastically supports the outer tub from the four corners of the main body. A safety device is provided between the main body and the outer tub, and the dehydration tub also serves as a washing tub. At least one elastic body having an oblique cross section for restricting the movement of the outer tank due to the rotation of the outer tank in the direction of the safety device is attached to the main body.

Further, a second means of the present invention for achieving the second object is to provide a fully automatic washing machine comprising: a main body; an outer tub including a dehydration tub also serving as a washing tub; A suspension device elastically supported from the four corners of the main body, a safety device provided between the main body and the outer tub, and two types of regulating the movement of the outer tub due to the rotation of the dehydration tub also serving as the washing tub in the direction of the safety device. This is a configuration in which at least one integral elastic body having the above characteristics is attached to the main body.

[0012]

The first means of the present invention comprises an outer tub located outside the dehydration tub also serving as a washing tub and receiving water during dehydration, and a suspension for elastically supporting the outer tub from four corners of the main body,
In the direction of the safety device provided between this body and the outer tank,
At least one elastic body with an oblique cross section that restricts the movement of the outer tub due to the rotation of the dewatering tub is attached to the main body, so that the elastic body secures the outer tub against abnormal vibration of the outer tub. A force that regulates vibration acts in the direction in which the device works,
The safety device operates reliably, and abnormal vibration can be effectively prevented with an inexpensive configuration.

A second means of the present invention comprises an outer tub located outside the dehydration tub also serving as a washing tub and receiving water during dehydration;
A suspension for elastically supporting the outer tub from the four corners of the main body, and two or more types of characteristics that regulate the movement of the outer tub due to the rotation of the dehydration tub in the direction of a safety device provided between the main body and the outer tub. With the configuration in which at least one integral elastic body having the unit is attached to the main body, the safety device operates the outer tank with the second elastic body against the first means against abnormal vibration of the outer tank. A force that regulates vibration in the direction acts, the safety device acts more reliably, and abnormal vibration can be effectively prevented.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIGS. 3, 4, and 5. Reference numeral 10 denotes a dehydration tub that also serves as a washing tub.
An outer tub 11 for receiving water during dehydration is provided. A speed reducer 13 connected to a motor 12 by a belt is fixed to a lower portion of the outer tub 11. The drive shaft of the speed reducer 13 has a double structure. The outer shaft is provided with the dehydration tub 10 by a flange 14 attached to the lower part of the dehydration tub 10, and the inner shaft is provided inside the dehydration tub 10. The stirring blade 15 is fixed. Further, the outer tub 11 is suspended from four corners of the washing machine main body 16 by suspensions 17 and is supported by vibration isolation. A fluid balancer 10a containing a liquid is attached to the upper part of the side surface of the dewatering tank 10. Further, a safety device 18 is attached between the main body 16 and the outer tub 11,
The main body 16 is provided with a first elastic body 19a and elastic bodies 19b and 19c having conventional shapes.

As shown in FIG. 4, in the present embodiment, the first elastic body 19a is formed by foaming a resin material, and has a shape in which a corner of a rectangular parallelepiped is cut off obliquely.
A felt 20 is adhered to the cut surface. Other configurations are the same as the conventional one.

The operation will be described with reference to the model diagram of FIG.
Due to the imbalance of the dewatering tub 10 caused by entanglement of the clothes at the time of washing, the outer tub 11 vibrates when the dehydration rotation is started. At this time, the dewatering tub 10 rotates with a large shaking depending on the contents of the clothing, the entangled shape of the clothing, and the like.
1 may abnormally vibrate, but when such a situation occurs, the outer tub 11 vibrates in a generally concentric range centered on the rotation axis.
Comes into contact with the safety device 18, whereby the function of correcting the imbalance of the dewatering tub 10 due to the entanglement of clothes or the like is operated. However, as shown in FIG. 5, depending on the structure of a heavy object such as the motor 12 below the outer tub 11 and the position of the center of gravity formed by the imbalance of the dewatering tub 10 caused by entanglement of clothes, etc. Numeral 11 vibrates in an elliptical range that vibrates in one direction, such as amplitude D1, with respect to the resonance vibration at the start of dehydration, and a situation occurs in which the elastic body 11 contacts the elastic body but does not contact the safety device 18. Even if such a situation occurs, the first elastic body 19a is formed by obliquely cutting the corner of the rectangular parallelepiped, and this surface collides with the outer tub 11 to generate a force F1. The vibration direction is regulated in the direction of the safety device 18, and comes into contact with the safety device 18, whereby the function of correcting the imbalance of the dewatering tub 10 due to the entanglement of clothes or the like is activated. In the case of the present embodiment, only 19a has the shape of the first elastic body, but the elastic body having this shape is not limited to this, and the same effect can be obtained by mounting a plurality of elastic bodies. Can be

Next, a second embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIG. The overall configuration is almost the same as that of FIG.

Hereinafter, the structure of the second elastic body 21a attached to the main body of this embodiment will be described. In FIG. 8, in the present embodiment, the second elastic body 21a is formed by foaming a resin material, and the second elastic body 21a is composed of a foam 21a1 and a foam 21a2.
1 and the foam 21a2 have different spring constants by changing the expansion ratio, and the two are adhered and the felt 22 is adhered to the surface.

Other configurations are the same as the conventional one. The operation will be described with reference to the model diagram of FIG. Due to the imbalance of the dehydration tub 10 caused by the entanglement of clothes during washing,
The outer tub 11 vibrates when the spin-drying operation is started. At this time, the dewatering tub 10 rotates with a large swing due to the contents of the clothing, the entangled shape of the clothing, and the like, and the outer tub 11 may abnormally vibrate accordingly, but in such a case, Normally, the outer tub 11 vibrates in a substantially concentric range around the rotation axis, so that the outer tub 11 comes into contact with the safety device 18 by the action of the elastic body. Is configured to operate the function of correcting
However, as shown in FIG.
Depending on the configuration of heavy objects such as 2 and the position of the center of gravity formed by the imbalance of the dewatering tub 10 caused by entanglement of clothes, the outer tub 11 has an amplitude D1 with respect to resonance vibration at the time of dehydration start. In this case, the vibration occurs in the range of the elliptical shape which vibrates violently in one direction. Even if such a situation occurs, the second elastic body 21a is replaced with a foam 21a1 having a different spring constant.
And the foam 21a2, the safety device 18
Can be operated to prevent abnormal vibration. That is, since the second elastic body 21a is composed of two kinds of foams having different spring constants, when the second elastic body 21a hits the outer tub 11, different forces F2 and F3 are obtained from the respective foams (21a1 and 21a2). Occurs, and the resultant force F4
Acts in the direction of the safety device 18 and the outer tub 11
The direction of vibration is regulated in the direction of 8, and comes into contact with the safety device 18, whereby the function of correcting the imbalance of the dewatering tub 10 due to the entanglement of clothes or the like is activated. In the case of the present embodiment, only 21a has the shape of the second elastic body, but the elastic body having this shape is not limited to this, and the same effect can be obtained by mounting a plurality of elastic bodies. .

Further, depending on the installation environment of the fully automatic washing machine, the first elastic body and the second elastic body can be mounted on the main body at the same time in order to further exhibit the anti-vibration effect.

[0021]

The first means of the present invention is to provide a fully automatic washing machine comprising: a main body; an outer tub containing a dehydration tub also serving as a washing tub;
A suspension device for elastically supporting the outer tub from the four corners of the main body is provided.A safety device is provided between the main body and the outer tub, and the movement of the outer tub caused by the rotation of the dehydration tub also serving as a washing tub is directed in the direction of the safety device. A structure in which at least one first elastic body having an oblique cross section to be regulated is attached to the main body, whereby the elastic body moves the outer tank in a direction in which the safety device works against abnormal vibration of the outer tank. The force for controlling the vibration acts, the safety device operates reliably, and the abnormal vibration can be effectively prevented with an inexpensive configuration. It is also effective in preventing felt peeling.

Further, a second means of the present invention provides a fully automatic washing machine comprising: a main body; an outer tub including a dehydration tub also serving as a washing tub; and a suspension for elastically supporting the outer tub from four corners of the main body. A safety device is provided between the main body and the outer tub, and an integral second unit having two or more types of characteristics for restricting the movement of the outer tub due to the rotation of the dehydration tub also serving as the washing tub in the direction of the safety device. At least one elastic body is attached to the main body. In response to the abnormal vibration of the outer tank, the second elastic body further moves the outer tank in the direction in which the safety device works against the first means. The force that regulates the vibration acts, the safety device acts more reliably, and abnormal vibration can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a fully automatic washing machine showing an embodiment of a first means of the present invention.

FIG. 2 is a plan view of a fully automatic washing machine showing an embodiment of the first means of the present invention.

FIG. 3 is a plan view of a main part of a fully automatic washing machine showing an embodiment of the first means of the present invention.

FIG. 4 is an external view of a first elastic body showing an embodiment of the first means of the present invention.

FIG. 5 is a model diagram showing an embodiment of the first means of the present invention.

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

FIG. 7 is a main part plan view of a fully automatic washing machine showing an embodiment of the second means of the present invention.

FIG. 8 is an external view of a second elastic body showing an embodiment of the second means of the present invention.

FIG. 9 is a model diagram showing an embodiment of the second means of the present invention.

FIG. 10 is a cross-sectional view showing a conventional fully automatic washing machine.

FIG. 11 is a plan view showing a conventional fully automatic washing machine.

FIG. 12 is a plan view of a main part of a conventional fully automatic washing machine.

FIG. 13 is an external view of a conventional elastic body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Dehydration tub 11 Outer tub 12 Motor 16 Main body 18 Safety device 19a First elastic body 21a Second elastic body

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 55-99489 (JP, U) JP-A 59-151591 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 37/24 D06F 39/12 D06F 49/06

Claims (2)

(57) [Claims] An outer tub containing a dehydration tub also serving as a washing tub, and a suspension for elastically supporting the outer tub from four corners of the main body, wherein a safety is provided between the main body and the outer tub. A fully automatic washing machine provided with a device, wherein at least one elastic body having an oblique cross section for restricting movement of the outer tub due to rotation of the dehydration tub toward the safety device is attached to the main body. 2. A main body, an outer tub containing a dehydration tub also serving as a washing tub, and a suspension for elastically supporting the outer tub from four corners of the main body, wherein a safety is provided between the main body and the outer tub. A fully automatic washing machine provided with a device, and attached to the main body at least one integral elastic body having at least two types of characteristics for restricting movement of the outer tub due to rotation of the dehydration tub toward the safety device.