JPH114993A - Drum washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum washing machine capable of suppressing vibration at the dehydration operation without the need for an electric controlling device. SOLUTION: When laundry X is watery and heavy, a laundry receiving plate 3 resists the energization of a first spring 4 and moves in a direction B. Each balancer weight 61, 62 is taken away from the rotation center by the energization of second springs 65, 66. On the other hand, the plate 3 moves in a direction A by the energization of the first spring 4 as the dehydration of the laundry X is progressing. Accordingly, a standing part, 3a also moves in the direction A and arms 3b, 3b for pushing up push lower boards 63b, 64b up. The balancer weights 61, 62 resist the energization of the second springs 65, 66 and approach a rotation shaft 2. Thereby, the weight balance is adjusted by following up the change in eccentric load caused by the progress of the dehydration of the laundry X.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine provided with a balancer weight to suppress vibration during a spin-drying operation.

[0002]

2. Description of the Related Art In a drum type washing machine, since the drum is arranged horizontally, when the drum is stopped before the spin-drying operation, the laundry is biased due to its weight to a position below the inner peripheral wall of the drum. . During the spin-drying operation, the drum rotates at a high speed in a state where the laundry is pressed against the inner peripheral wall of the drum, so that the laundry becomes an eccentric load and the drum vibrates violently. In particular, a vertical vibration component gives a violent vibration to the floor surface, and generates large noise.

[0003] In order to suppress the vibration caused by the eccentric load, a drum type washing machine has been proposed in which a vibration sensor for detecting the magnitude of vibration of the drum is installed and a plurality of balancer containers are arranged on the outer peripheral wall of the drum. (See Japanese Patent Application Publication No. 504483/1990). In this drum type washing machine, first, the magnitude of vibration of the drum is detected by a vibration sensor. Then, a predetermined amount of water set in advance is supplied to any one balancer, and the magnitude of the vibration of the drum in that state is detected again by the vibration sensor, and the magnitude of the vibration detected last time is newly detected. Compare the magnitude of the vibration. As a result of this comparison, if the magnitude of the newly detected vibration is smaller than the magnitude of the previously detected vibration, an amount of water different from the predetermined amount is supplied to the balancer container, and the drum in that state is supplied. Is detected by a vibration sensor. On the other hand, when the magnitude of the newly detected vibration is larger than the previously detected vibration, the predetermined amount of water is supplied to a balancer container different from the balancer container, and the magnitude of the vibration of the drum in that state is supplied. Is detected by the vibration sensor. In this manner, the detection of the magnitude of the vibration of the drum, the supply of water to the balancer container, and the comparison of the detection results are repeated, and finally the magnitude of the vibration of the drum falls within a predetermined allowable range. Here, the balancer container supplied with water serves as a counter balancer for the eccentric load.

[0004]

However, the above-mentioned conventional drum-type washing machine requires an electric control device for controlling how much water is supplied to which balancer container. Is expensive.

[0005] In view of the above circumstances, an object of the present invention is to provide a drum type washing machine capable of suppressing vibration during a spin-drying operation without requiring an electric control device.

[0006]

According to a first aspect of the present invention, there is provided a drum type washing machine in which a drum for storing laundry is provided rotatably around a horizontal axis. When the laundry is heavy and contains moisture, one or more balancer weights are moved away from the position of the laundry substantially opposite to the axis with respect to the axis, and as the dehydration proceeds and the laundry becomes lighter, the balancer weight is reduced. Is moved toward the axis.

As a specific structure, a laundry receiving plate disposed in a drum and a laundry receiving plate provided between an inner wall of the drum and the laundry receiving plate are provided. Sometimes a first biasing means capable of lifting the plate, and a direction 90 ° clockwise to the axis, in a direction perpendicular to the axis outside the back wall of the drum and based on the position of the laundry. A first balancer weight movably provided at any position greater than 180 ° and greater than 90 ° counterclockwise to the axis;
A second movably provided at any position less than 0 °
A balancer weight, guide means for guiding each balancer weight, second biasing means for biasing each balancer weight in a direction away from the shaft, and a back wall of the drum in response to movement of the laundry receiving plate. And the balancer weight is moved toward the axis against the second urging means by the movement of the plate when dehydration proceeds and the laundry becomes lighter. One provided with a moving means is conceivable.

With the above arrangement, when the laundry is heavy and contains moisture, the balancer weight is moved away from the position of the laundry with respect to the axis with respect to the axis. Weight balance is secured. On the other hand, as the dehydration proceeds and the laundry becomes lighter, the balancer weight is moved closer to the axis, so that the weight balance for the lightly dehydrated laundry is ensured. That is, since the weight balance is made following the change of the eccentric load due to the progress of the dehydration of the laundry, the vibration of the drum can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a diagram showing the drum and its peripheral mechanism when the laundry is heavy and contains moisture (before dehydration), and FIG. 1 (a) is an explanatory diagram viewed from the back side. FIG. 4B is a vertical sectional side view. FIG. 2 is a view showing the drum and its peripheral mechanism when the laundry is light (after dehydration), and FIG. 2 (a) is an explanatory view seen from the back side. Figure (b) is a longitudinal side view.

The drum 1 containing the laundry X is driven to rotate by a rotating shaft 2 disposed horizontally. A laundry receiving plate 3 having a curved shape corresponding to the curvature of the inner wall surface of the drum is disposed in the drum 1.
The inner wall of the drum where the laundry receiving plate 3 is disposed is formed to have a larger diameter than the other inner wall of the drum, and forms a concave area. The first springs 4 are provided in this concave area. The first springs 4 have an urging force as a whole that lifts the laundry receiving plate 3 when the laundry X is lightened due to dehydration. A standing portion 3a is provided at the back of the laundry receiving plate 3.
Are formed. The standing portion 3a is the laundry receiving plate 3
Similarly, if moves in the AB direction, it also moves in the AB direction. Further, push-up arms 3b, 3b are formed in the standing portion 3a. The shape and operation of the push-up arms 3b, 3b will be described later in detail.

An inner portion of the drum 1 as a laundry accommodating space is formed of an elastic sheet-like wall 1a. The sheet-like wall 1a and the upright portion 3a are in close contact with each other to achieve sealing, and the upright portion 3a
Is moved in the AB direction, the sheet-like wall 1a follows the movement by its elasticity, and the function of the drum 1 as the inner wall of the laundry accommodating space is maintained.

On the farther side than the sheet-like wall 1a, a far-side structure 5 having a flat cylindrical shape and one side open.
Are provided in a fixed state with respect to the drum 1. The upright portion 3a and its push-up arm 3b,
3b is covered. Further, the rotation shaft 2 protrudes outside the center portion of the back side structure 5. A weight balancer mechanism 6 is provided on the inner side of the back side structure 5.

The weight balancer mechanism 6 includes the rotating shaft 2
180 ° greater than 90 ° clockwise with respect to the rotation axis 2 with respect to the position of the laundry X as a reference.
° (in this embodiment, approximately 10 °).
(0 °), and a spherical first balancer weight 61 movably provided at any position greater than 90 ° and less than 180 ° counterclockwise to the rotation shaft 2 (same as above).
, A spherical second balancer weight 62 movably provided, guide means 63, 64 for guiding the balancer weights 61, 62, and a plurality of balancer weights 61, 64 disposed in the respective guide means 63, 64. It comprises second springs 65 and 66 for urging the cylinder 62 away from the rotation shaft 2.

The guide means 63 (64) is composed of two plate members 63a (64a) and 63b (64b) extending in the outer peripheral direction from positions near the rotary shaft 2, respectively. The upper plate 63a (64a) is provided in a fixed state, and the lower plate 63b (64b) swings around the fulcrum 63c (64c) as a fulcrum. The fulcrum 63c (6
4c) is provided on the inner convex portion 5a of the back side structure 5. The fulcrum 63c (64c) is desirably provided movably so that the balancer weights 61 and 62 can easily move toward the axis.

The above-mentioned push-up arms 3b, 3b are
And a plate 63b (64b) below the guide means 63 (64).
Is located below (in the direction B). The push-up arms 3b, 3b are moved in the direction A by the movement of the laundry receiving plate 3 in the direction A (direction approaching the center of rotation) when dehydration proceeds and the laundry X is lightened. The lower plate 63b (64b) comes into contact with the outer end thereof to increase its inclination.

In the above configuration, as shown in FIGS. 1 (a) and 1 (b), when the laundry X is heavy and contains moisture, the laundry receiving plate 3 is biased by the first spring 4. Is moving in the B direction against. Accordingly, the standing portion 3a also moves in the direction B, and the push-up arms 3b, 3b do not push up the lower plate 63b (64b) on the lower side of the weight balancer mechanism 6, so that each balancer weight 61 (62) is in the second position. The spring 65 (66) keeps the rotary shaft 2 away from the rotating shaft 2. As a result, for the large moment due to the position of the laundry X and its heavy weight, an equivalent large moment is generated on the side substantially opposite to the position of the laundry X, and the two moments are balanced to give the heavy laundry a load. Therefore, the weight balance is secured.

On the other hand, as shown in FIGS. 2A and 2B, when the dehydration of the laundry is advanced, the laundry receiving plate 3 is moved in the direction A by the bias of the first spring 4. I do. Therefore, the standing portion 3a also moves in the direction A, and the push-up arm 3
b, 3b are plate members 63 on the lower side of the weight balancer mechanism 6
b (64b) is pushed up to increase its inclination. As a result, the guide means 63 and 64 form a tapered guide path, and the movement vector in the axial direction of the balancer weight 61 (62) increases due to the increase in the inclination, so that each balancer weight 61 ( 62) approaches the rotating shaft 2 against the bias of the second spring 65 (66). As a result, for the small moment due to the position of the laundry X and its light weight, an equivalent small moment is generated on the side substantially opposite to the position of the laundry X, and both moments are balanced, so that the light laundry is applied to the light laundry. Weight balance will be secured. That is, since the weight balance is obtained by following the change in the eccentric load due to the progress of the dehydration of the laundry X, the vibration of the drum 1 can be reduced.

In the above embodiment, the one provided with two balancer weights has been described. However, the present invention is not limited to this.
Of course, a structure having one or three or more may be used. When one balancer weight is used, the balancer weight is provided so as to be movable in a direction substantially orthogonal to the rotation shaft 2 and on a side opposite to the position of the laundry X. When three or more balancer weights are used, they may be arranged so that their overall load is applied to the opposite side of the position of the laundry X.

[0020]

As described above, according to the present invention,
Since the vibration during the spin-drying operation is mechanically suppressed by providing the balancer weight without providing the electric control device, the drum type washing machine with less noise can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a view showing a state before dehydration of a drum type washing machine according to an embodiment of the present invention, wherein FIG. 1 (a) is an explanatory diagram viewed from the back side, and FIG. It is a side view.

FIG. 2 is a view showing a state after dehydration of the drum type washing machine according to the embodiment of the present invention, wherein FIG. 2 (a) is an explanatory view seen from the back side, and FIG. It is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drum 1a Sheet-shaped wall 2 Rotating shaft 3 Laundry receiving plate 3a Push-up arm 4 First spring 4 5 Back side structure 6 Weight balancer mechanism 61 First balancer weight 62 Second balancer weight 63 Guide means 63a Upper side 63b lower plate 63c fulcrum 64 guide means 63a upper plate 63b lower plate 63c fulcrum 65 second spring 66 second spring

Claims (2)

[Claims] 1. A drum type washing machine in which a drum for accommodating laundry is rotatably provided around a horizontal axis, wherein one or two or more balancer weights are attached to the shaft when the laundry is heavy and contains moisture. A drum-type washing machine configured to move the balancer weight toward the axis as dehydration progresses and the laundry becomes lighter, by moving the balancer away from the laundry to a position substantially opposite to the position of the laundry. . 2. A drum-type washing machine in which a drum for storing laundry is provided rotatably around a horizontal axis, a laundry receiving plate disposed in the drum, an inner wall of the drum, and the laundry receiver. A first urging means provided between the first plate and the plate, which is capable of lifting the plate when dehydration proceeds and the laundry becomes lighter, and a direction perpendicular to the axis outside the back wall of the drum; And a first balancer weight movably provided at any position greater than 90 ° and less than 180 ° clockwise to the axis with respect to the position of the laundry, and 90 ° counterclockwise to the axis. A second balancer weight movably provided at any position larger than 180 °, a guide means for guiding each balancer weight, and each balancer weight attached in a direction away from the axis. A second urging means for moving the laundry receiving plate, and moving the laundry receiving plate outside the back wall of the drum, and moving the plate when dehydration proceeds and the laundry becomes lighter. And a moving means for moving the balancer weight toward the axis against the second urging means.