JPH0751183B2 - Anti-vibration device for dehydration washing machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device for a dewatering washing machine for washing and dewatering clothes and the like.

2. Description of the Related Art Conventionally, this type of dewatering washing machine has a structure as shown in FIG. 6, for example, as shown in Japanese Utility Model Publication No. 49-30710. That is, in the figure, 1 is the main body of the dehydration washing machine, 2
Is a washing and dewatering tank with a plurality of dewatering holes 3 formed in the inner peripheral wall,
Reference numeral 4 denotes a laundry receiving tub in which the washing / dehydrating tub 2 is rotatably installed inside, 5 is a stirring blade provided at a central bottom portion of the washing / dehydrating tub 2, 6
Is a transmission mechanism, which has a reduction gear and a washing
It has a dehydration switching clutch and a brake for dehydration. A motor 7 is attached to the bottom of the outer tub 4, and the power of the motor 7 is transmitted via a motor pulley 8, a belt 9 and an impeller pulley 10. An anti-vibration mechanism 11 is suspended from the main body 1 and supports the laundry receiving tub 4 from the main body 1 by anti-vibration.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a structure, if the laundry (not shown) in the washing / dehydrating tub 2 is unevenly distributed at the time of washing, the moment acting on the laundry at the time of starting dehydration causes the laundry to wash. The combined dewatering tub 2 receives an eccentric force toward the outer peripheral direction, and large vibrations are generated in the horizontal and vertical directions in the laundry receiving tub 4 suspended and supported by the vibration isolating mechanism 11. On the other hand, although the vibration isolating mechanism 11 is provided so as to damp the vibration of the washing tub 4, the vibration isolating mechanism 11 mainly acts on the vibration in the vertical direction,
Since it is not sufficient for horizontal vibration, it cannot suppress horizontal vibration at the time of dehydration start, and it collides with the main body 1 or immediately activates a safety switch (not shown), resulting in Occasionally, normal dehydration was not performed.

Further, when the main body 1 is installed at an inclination, the laundry receiving tub 4 is only suspended and supported by the vibration isolating mechanism 11, so that the laundry receiving tub 4 is eccentrically positioned and a gap with the main body 1 is not secured. There were problems such as the formation of parts and the possibility of collision.

The present invention, even if the laundry is unevenly distributed in the washing and dewatering tank,
In addition, even when the main body is installed in an inclined place, it prevents the washing tub from colliding with the main body at the time of starting dehydration, and enables smooth dehydration. The purpose is to increase the size to increase the capacity and, on the contrary, to reduce the size of the body to make it more compact.

Means for Solving the Problems The technical means of the present invention for achieving the above-mentioned object is to be suspended and supported in the main body of the spin-drying washing machine and a vibration damping mechanism for damping vertical vibration. And a plurality of pairs of compressible elastic bodies interposed between the side walls of the main body and the side wall of the laundry receiving tank in the radial direction, and one end of the elastic body is fixed to either the washing receiving tank or the main body. The other end is substantially free, and the elastic body is composed of a coil spring having a winding diameter set such that at least a part of the adjacent coils are not in contact with each other during compression.

Action The action of this technical means is as follows.

That is, by changing the winding diameter of the coil, the elastic body is given the characteristic that the spring constant differs depending on the amount of compressive displacement. That is, when the amount of compressive displacement is small, the portion with a large winding diameter is deformed to reduce the spring constant, and when the amount of compressive displacement is large, the portion with a small winding diameter is deformed to increase the spring constant. Is given to the elastic body. Therefore, by elastically interposing this elastic body between the side wall of the washing tub and the side wall of the main body, the elastic body is prevented from vibrating with a large amplitude in the horizontal direction of the washing tub which is generated at the time of dehydration start due to the unevenness of the laundry. The large restraint of the spring causes a large suppression force to reduce the amplitude of the washing tub, and the spring constant of the elastic body becomes smaller for vibration with a small amplitude in the steady state that exceeds the resonance point. Due to the deformation of the part, the vibration transmission from the washing tub to the main body can be made small.

As a result, even if the laundry is unevenly distributed, the laundry receiving tub does not collide with the main body at the time of starting dehydration, and the vibration transmission to the main body at the time of steady dehydration is small, so that smooth dehydration can be performed.

Further, even when the main body is installed in an inclined place, the elastic force suppresses the laundry receiving tub in the center to secure a gap between the washing receiving tub and the main body, and smooth dewatering can be performed as in horizontal installation. I am supposed to.

Further, if the same main body as the conventional one is used to increase the capacity, the gap between the washing tub and the main body is reduced. However, in the present invention, at least in part, a coil spring whose winding diameter is changed so that adjacent coils do not come into contact during compression. Since it is used as an elastic body, it can sufficiently act as an elastic body even if it is elastically contacted in a small gap.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of a dewatering washing machine according to an embodiment of the present invention, and FIG. 2 is a plan view of the same. In the figure,
Since 1 to 11 are the same as the members of the conventional example shown in FIG. 6, their description will be omitted. Reference numeral 12 denotes an elastic body, which is a conical coil spring whose winding diameter is changed so that adjacent coils do not come into contact with each other during compression, as shown in the detailed view of FIG. Like That is, it is composed of a coil spring in which the radius difference between the coil winding diameters is equal to or larger than the wire diameter. The elastic body 12 has one end fixed to the side wall of the washing tub 4 by the support member 13, and the other end elastically contacts the side wall of the main body 1 in a substantially free state. In addition, in the above-mentioned embodiment, one end of the elastic body 12 is fixed to the laundry receiving tub 4, but it is needless to say that even if it is fixed to the main body 1, the same effect is obtained.

Next, the operation of the configuration of this embodiment will be described.

When washing water is put into the washing / dehydrating tub 2 and the laundry receiving tub 4 at the time of washing, the laundry receiving tub 4 descends due to its weight. Due to this lowering, the compression spring provided in the anti-vibration mechanism 11 is in a fully compressed state, but during washing, the stirring blade 5 rotates and the laundry only moves due to the water flow. Small, vibration during washing is not a problem.

On the other hand, at the time of dehydration, the washing water in the laundry receiving tub 4 is discharged to the outside, so that the weight of the laundry receiving tub 4 is reduced. With this decrease, the compression spring of the anti-vibration mechanism 11 is in a slightly extended state,
Vibration of the laundry receiving tub 4 caused by uneven distribution of laundry with the start of dehydration is attenuated.

Generally, the vibration of the laundry receiving tub 4 at the time of dehydration is roughly classified into horizontal vibration and vertical vibration. The conventional vibration damping mechanism 11 can sufficiently absorb the vertical vibration, but the horizontal vibration is insufficient when the laundry is largely biased. In order to further increase the washing capacity, it is necessary to increase the outer diameters of the washing / dehydrating tub 2 and the laundry receiving tub 4. At that time, in order to keep the main body 1 on the same floor area as the conventional one, the washing of the main body 1 and the washing It is necessary to reduce the gap with the receiving tank 4. In order to reduce this gap, it is necessary to suppress the horizontal vibration of the washing tub 4 during dehydration more than before.

Therefore, in this embodiment, an elastic body 12 is elastically interposed between the main body 1 and the laundry receiving tub 4 in order to suppress horizontal vibration, particularly vibration at the initial stage of activation. Since this elastic body 12 exhibits a non-linear characteristic in which the spring constant increases in proportion to the amount of compressive displacement, it has a load-displacement characteristic as shown in FIG. Therefore, when the displacement amount of the laundry receiving tub 4 increases, the elastic body 12
Can apply a large reaction force to the washing tub 4 and suppress a large amplitude vibration that occurs at the initial stage of the dehydration start, and the spring constant of the elastic body 12 is small with respect to the vibration of a relatively small amplitude during the steady dehydration. Therefore, the vibration in the steady state is hardly transmitted to the main body 1.

Further, by using a conical coil spring whose winding diameter is changed so that the adjacent coils do not come into contact with each other at the time of compression, the elastic body 12 has a flat surface as shown in FIG. Even if 12 is used, a sufficient elastic action can be obtained. Therefore, in order to increase the capacity, the main body 1
Even if the gap between the washing tub 4 and the laundry receiving tank 4 is made small, the elastic body 12 elastically contacted with the gap can sufficiently act, so that smooth dewatering can be performed in combination with the effect of suppressing the vibration at the time of starting the dewatering. . In addition, since the adjacent coils of the elastic body 12 do not come into contact with each other during compression, the contact noise of the coil is reduced and the durability of the elastic body 12 is improved.

Further, since the elastic body 12 of this embodiment has one end fixed and the other end substantially free, the elastic body 12 is not stressed more than necessary even when the washing tub 4 is moved vertically and horizontally, so that the elastic body 12 is elastic. It is possible to reduce the wire diameter of the body 12 and improve the durability. And what is important here is that the predetermined resilience, that is, the resilience corresponding to the stress in the bending direction of the elastic body 12 under the friction holding force between the free end and the opposite side surface is also effective for vibration damping. Therefore, a reliable anti-vibration effect can be obtained.

Further, by providing the elastic bodies 12 at at least four substantially symmetrical positions, the washing tub 4 will be located at the center regardless of which direction the main body 1 is installed. Even if the place is slightly inclined, the dehydration is normally performed, and there is no inconvenience that the operation is stopped or the rinse is performed again and then the restart is required as in the conventional case.

A conical coil spring is used as the elastic body 12 of this embodiment so that all the coils do not come into contact with the adjacent coils during compression. However, the elastic body is adjusted according to the gap between the main body 1 and the laundry receiving tub 4. A coil spring whose winding diameter is changed so that only a part of 12 does not come into contact with the adjacent coil may be used. Further, in this case, in a portion where the coil winding diameter is large, it is better not to make contact with the adjacent coil, so that the contact between the coils which is always easily deformed during dehydration is eliminated, and the durability of the elastic body 12 is improved. The sound hit between the coils is reduced.

EFFECTS OF THE INVENTION The present invention uses an elastic body having a coil spring having a winding diameter such that at least a part of adjacent coils are in non-contact with each other when compressed, and the elastic body is elastically interposed between a main body side wall and a washing tub side wall, Due to the restoring elastic force of the elastic body against the compressive stress and the restoring elastic force against the bending stress, even if dehydration is started in a state where the laundry is biased, the washing tub can be started without colliding with the main body, and in the steady state Vibration transmission from the washing tub to the main body can be reduced, and smooth dehydration can be performed.

Further, since the elastic body sufficiently acts as an elastic body even if it is elastically contacted in a place with a small gap, in combination with the dehydration starting characteristic, even if the main body has the same size, a washing / dehydrating tank, etc. The large outer diameter allows you to wash and dehydrate a large amount of clothes at the same time.
Weight reduction can be achieved.

Furthermore, even if the main body is installed on an inclined surface, the movement of the laundry receiving tub is suppressed by the elastic body, the laundry receiving tub is located in the approximate center of the main body, and has the same dehydration start-up characteristics as when installed on a horizontal surface. You can

[Brief description of drawings]

FIG. 1 is a side sectional view of a dewatering washing machine according to an embodiment of the present invention, FIG. 2 is a plan view of the dewatering washing machine, FIG. 3 is a detailed view of an elastic body of the dewatering washing machine, and FIG. FIG. 5 is a detailed view showing the elastic body at the time of compression, FIG. 5 is a load-displacement characteristic view of the elastic body of the invention, FIG.
The figure is a side sectional view of a conventional dehydration washing machine. 1 …… Main body, 4 …… Laundry tank, 11 …… Vibration isolation mechanism, 12 ……
Elastic body.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic references Sho 49-149573 (JP, U) Actual public 36-14890 (JP, Y1) Actual public 46-21825 (JP, Y1)

Claims (2)

[Claims] 1. A main body of a dewatering washing machine, a washing tub suspended and supported in the main body through a vibration damping mechanism for damping vertical vibrations, and a diameter between a side wall of the main body and a side wall of the washing tub. A plurality of pairs of compressible elastic bodies are provided at opposing positions in the direction,
One end of the elastic body is fixed to either the washing tub or the main body and the other end is substantially free, and the elastic body is composed of a coil spring set to a winding diameter such that adjacent coils are at least partially non-contact during compression. Anti-vibration device for dehydrated washing machine. 2. An anti-vibration device for a dewatering washing machine according to claim 1, wherein the elastic body is in non-contact with a portion having a large coil winding diameter.