JPH053987A - Drum type washing machine - Google Patents

Abstract

PURPOSE:To permit the installation of a drum type washing machine even if the installation place consists of a plate floor by damping the vibration in dehydration drive. CONSTITUTION:A drum 6 is accommodated into an outer tank 3, and suspended from the upper part of an outer installation frame 1 through a spring 4, and the lower part of the outer tank 3 and the lower part of the outer installation frame 1 are connected by a shock absorber 5, and castors 18 which can turn in 360 deg. are installed at plural places in the outer lower surface part of the outer installation frame 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leg structure of a drum type washing machine.

[0002]

2. Description of the Related Art Washing. rinse. For example, a drum type washing machine in which each process of dehydration and drying is performed by one drum is described in, for example, Shokai Sho 62
It is well known as disclosed in Japanese Patent No. 115885.

During operation of such a drum-type washing machine, the exterior frame vibrates greatly in the vertical direction due to the high-speed rotation of the drum, especially during dehydration. This is a vibration generated by the structure peculiar to the drum type washing machine, that is, a vibration generated by rotating the drum at a high speed and a vibration generated by the eccentricity of the laundry in the drum, and vibrates. In addition, this vibration can be divided into vertical vibration and horizontal vibration to the front, rear, left, and right. Of these vibrations, when the vertical vibration is transmitted to the floor through the exterior frame, the floor repels the vibration. The vibration was becoming more intense because it created a situation that caused the vibration to be amplified.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and is provided with anti-vibration legs capable of absorbing vertical vibration and horizontal vibration of the exterior frame. is there.

[0005]

In the drum type washing machine according to the present invention, a drum for performing a series of washing operations and an outer tub accommodating the drum are suspended from the upper portion of the exterior frame by a vibration isolator. While lowering, the lower part of the outer tub and the lower part of the exterior frame are connected by a vibration isolator, and casters rotatable by 360 degrees are fixed to a plurality of locations on the outer lower surface of the exterior frame.

[0006]

That is, the vertical vibration of the exterior frame during high-speed rotation in the dehydration process is converted into horizontal vibration through the free portion of the caster by the anti-vibration leg made of the caster that can rotate 360 degrees. Attenuated. With respect to horizontal vibrations in the front, rear, left and right, the vibrations are damped through the free portion of the free caster.

When the floor surface is an elastic board floor, vertical vibrations are converted into horizontal vibrations by the free portion of the casters and are attenuated, so that vibrations occurring in both the exterior frame and the floor are suppressed. Vibration can be significantly damped without amplification.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings.

FIG. 1 is a rear view showing an embodiment of a drum type washing machine to which the present invention is applied, and FIGS. 2 to 7 are graphs for explaining a vibration damping state showing a result of a vibration isolation practical test.

In these figures, 1 is an exterior frame,
Reference numeral 2 denotes a top plate, and a door device (not shown) is pivotally supported by a hinge on the front surface so that laundry can be put in and taken out. An outer tank 3 is suspended from the upper part of the exterior frame 1 by a spring 4 and from the lower part by a shock absorber 5. A drum 6 is axially supported by a bearing 7 inside the outer tub 3. The lower part of the outer tank 3 is
8 is attached and washed. rinse. At the time of dehydration and drying, the pulley 9.10 is operated by a variable speed means such as an inverter.
Also, the rotation of the drum 6 is controlled via the V belt 11. The drain valve 12 is provided in the lower part of the outer tank 3,
It is connected to the outside of the machine by a hose 13. An air trap 14 is provided between the outer tank 3 and the drain valve 12, and a pressure sensor 15 detects the liquid (water) level of the outer tank 3 by pressure. A water supply valve 16 is connected to the outer tub 3, and water supply is controlled by a signal from a pressure sensor-15. Reference numeral 17 denotes a hot water supply valve, which is controlled to be opened and closed when washing with water supplied from the water supply valve 16 and when performing hot water washing instead.

Reference numeral 18 denotes a caster fixed to the four corners of the bottom of the exterior frame 1 and capable of rotating 360 degrees. The caster shaft 19 is supported by the caster shaft 19 such that the caster shaft 19 can rotate 360 degrees. A roller guide 20 and a roller 21 rotatably supported by the roller guide 20.

Thus, the caster 18 converts the vibration transmitted in the floor direction into the horizontal direction of 360 degrees and attenuates it. The reason for this is not clear, but it was possible to prove it by the experiment shown below.

As a condition of the experiment, a bath towel which is easy to be unbalancedly loaded was adopted as a kind of laundry. The washing machine was installed on the wooden floor and the concrete floor. After installation under these conditions, the vibration characteristics of the washing machine during the spin-drying process were measured using the following five types of vibration damping structures. 1. In the case of using a caster capable of rotating 360 degrees in the leg portion of the present invention. 2. When non-elastic rubber (hardness 20 degrees) is used for the legs. 3. When non-elastic rubber (hardness 40 degrees) is used for the legs and there is no balancer on the side wall of the drum. 4. When non-elastic rubber (hardness 40 degrees) is used for the legs and balancers are attached to the side wall of the drum one by one. 5. When non-elastic rubber (hardness 40 degrees) is used for the legs and two balancers are attached to the left and right side walls of the drum.

The graphs shown in FIGS. 2 to 4 show the state of vibration characteristics when the board floor is installed. The graphs indicated by circles have been confirmed to be superior in vibration characteristics when the casters are used to the various configurations as compared with the other configurations.

The graphs shown in FIGS. 5 to 7 show the vibration characteristics of the concrete floor installation. In the case of this concrete floor, the tendency of damping the vibration is similar to that of the wooden floor. Since the concrete floor is stiff, the amplitude level is relatively lower than that of the wooden floor,
We were able to confirm that it was better.

Inferring the above results, the caster shaft 1
Roller guide 20 that is rotatably supported by 360 degrees in 9
Therefore, it is considered that the vertical vibration is converted into the horizontal vibration and attenuated. In addition, the roller guide 20
It can be inferred that the roller 21 pivotally supported on the floor enables the vibration after the horizontal conversion to be freely moved with respect to the floor, thus enhancing the vibration damping effect.

As described above, by fixing the flexible caster 18, which can be installed so that the exterior frame 1 can be swung with respect to the floor surface, to the exterior frame 1, vertical vibration and front-back, left-right, and horizontal directions can be achieved. It was possible to obtain a stable anti-vibration effect within the safety specified amplitude (1 mm or less).

Further, the self-weight of the drum type washing machine itself. Due to the imbalance in combination with the self-weight of the outer tub 3 including the drum 6 and the hollow supporting force of the anti-vibration device (spring 4 and shock absorber 5), the installation position of the outer frame 1 itself during dehydration drive It may move. In this case, by providing a free roller with a stopper mechanism at least at one place in the free caster 18, it is possible to mitigate the vibration in the vertical direction and prevent the movement of the installation position. good.

[0019]

The floor on which the drum type washing machine is installed is a flat floor. Vibrations during high-speed rotation in the dehydration process are damped regardless of the concrete floor, and can be used without generating abnormal vibrations, and there is no need to select installation conditions.

[Brief description of drawings]

FIG. 1 is a rear view of a drum type washing machine embodying the present invention.

FIG. 2 is a front-back vibration characteristic table when the installation condition is a board floor.

FIG. 3 is a vertical vibration characteristic table when the installation condition is a board floor.

FIG. 4 is a table of vibration characteristics in the horizontal direction when the installation condition is a board floor.

FIG. 5 is a longitudinal vibration characteristic table when the installation condition is a concrete floor.

FIG. 6 is a vertical vibration characteristic table when the installation condition is a concrete floor.

FIG. 7 is a horizontal vibration characteristic table when the installation condition is a concrete floor.

[Explanation of symbols]

 1 Exterior Frame 3 Outer Tank 4 Anti-Vibration Material (Spring) 5 Anti-Vibration Material (Shock Absorber) 6 Drum 18 Casters

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshikazu Baba 2-18 Keiyo Hondori, Moriguchi Sanyo Electric Co., Ltd. (72) Inventor Kenji Nakagawa 2-18 Keiyo Hondori, Moriguchi Sanyo Electric Co., Ltd. (72) Inventor Kuniyuki Honda, 2-18, Keihan Hondori, Moriguchi City Sanyo Electric Co., Ltd. (72) Inventor, Takao Kuraseko 2-18, Keihan Hondori, Moriguchi Sanyo Electric Co., Ltd. (72) Inventor Yuji Katsuo 2-18, Keihan Hondori, Moriguchi City Sanyo Electric Co., Ltd. (72) Inventor, Tsutomu Okada 2-18, Keihan Hondori, Moriguchi City Sanyo Electric Co., Ltd.

Claims (1)

Claims: 1. Washing. rinse. In a drum type washing machine that performs a series of washing operations such as dehydration and drying in one drum, the outer tub accommodating the drum is suspended from the upper part of the exterior frame by a vibration isolator, and at the same time as the lower part of the outer tub. Exterior frame
A drum type washing machine characterized in that a lower part of the frame is connected with a vibration isolator, and casters rotatable by 360 degrees are fixed to a plurality of positions on an outer lower surface of the exterior frame.