JP2011045513A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing machine for improving detergency. <P>SOLUTION: The drum type washing machine includes a rotary drum for housing clothes, a plurality of lifters provided on the outer peripheral wall of the rotary drum, an outer tub for housing the rotary drum and accumulating water, a motor for driving the rotary drum, and a casing for supporting the outer tub. A plurality of raised parts radially extending from the center are provided on the bottom wall of the rotary drum, and a plurality of projections in a projected shape are provided on the flat part of the bottom wall. Thus, since the clothes raked up by the lifters by the rotation of the rotary drum rub each other with the projections in the projected shape, the effect of removing dirt is improved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an improvement in detergency during washing in a drum type washing machine.

  A drum type washing machine has a structure as shown in Unexamined-Japanese-Patent No. 2008-125804 (patent document 1), for example.

  This drum type washing machine has a rotating drum for storing laundry, an outer tub for storing washing water in which a rotatable rotating drum is placed, a drive motor for rotationally driving the inner washing tub, and a vibration isolation for the outer tub. It has an anti-vibration mechanism to support it.

  The rotating drum includes a cylindrical body, a bottom wall on the rear end side of the body, a front reinforcing ring provided on the front end side of the body, an annular fluid balancer supported by the front reinforcing ring, and the like.

  Further, in the drum type washing machine disclosed in Japanese Patent Application Laid-Open No. 2005-334565 (Patent Document 2), in order to reduce washing unevenness, lifters for lifting the laundry on the inner periphery of the rotating drum are arranged at equal intervals. A small lifter with a length lower than the height of the lifter is provided between the lifters.

  Further, in the drum type washing machine disclosed in Japanese Patent Application Laid-Open No. 2005-253567 (Patent Document 3), a rotating member is provided on the bottom surface of the rotating drum so as to eliminate the unevenness of the laundry and allow sufficient stirring, and the rotating member A plurality of protrusions are provided on the surface.

JP 2008-125804 A JP 2005-334565 A JP 2005-253567 A

  When cleaning dirt adhered to clothes in a drum type washing machine, a mechanical force is applied to the clothes and a cleaning method using the mechanical force is performed. Therefore, the degree of cleaning greatly depends on the inner diameter of the rotating drum.

  That is, in the case of a drum-type washing machine, a plurality of lifters are provided on the inner side of the rotating drum, the clothes are lifted by rotating the rotating drum, the clothes are dropped from the maximum height of the inner diameter of the rotating drum, and mechanical force is applied to the clothes. In order to clean clothes well, it was necessary to increase the inner diameter of the rotating drum.

  However, increasing the inner diameter of the rotating drum inevitably increases the washing machine body, which makes it difficult to install in a general house.

  For this reason, it is required to give the garment a mechanical force capable of removing dirt adhered to the garment without reducing the inner diameter of the rotating drum and reducing unevenness in washing.

  An object of the present invention is to reduce the unevenness of washing away stains on clothes and improve the cleaning power without increasing the inner diameter of a rotating drum.

In order to achieve the above object, the present invention provides:
A rotating drum in which clothing is stored; a plurality of lifters provided on an inner peripheral surface of the rotating drum; an outer tub that stores the rotating drum and is disposed concentrically with the rotating drum and stores water for washing; In the drum type washing machine having a motor for driving the rotating drum and a casing for supporting the rotating drum, a plurality of radially extending from the center to the rotating drum bottom wall connecting the motor rotating shaft to the rotating drum And a plurality of convex protrusions on the flat portion of the bottom wall.

  According to the present invention, when the rotating drum rotates, the clothes that are lifted up by the lifter are lifted while rubbing against the protrusions on the bottom wall, and also fall while rubbing against the protrusions on the bottom wall. As a result, not only the tapping effect by dropping but also the effect of scrubbing can be obtained, and the effect of removing dirt from clothes is improved.

It is an external view which shows the drum type washing-drying machine of this invention. It is a side view which shows the internal structure of the drum type washing-drying machine of this invention. FIG. 2 is a view showing a washing / drying main unit including a washing / dehydrating tub, an outer tub, and a motor in order to show the internal structure of the drum type washing / drying machine of the present invention. It is sectional drawing which cut | disconnects the washing | cleaning and dehydration tank of the drum type washing-drying machine of this invention vertically at the approximate center part of the front-back direction, and shows a bottom wall surface. It is sectional drawing which cut | disconnects the washing | cleaning and dehydration tank of the drum type washing-drying machine of this invention vertically at the approximate center part of the front-back direction, and shows a bottom wall surface. It is sectional drawing which cut | disconnects the washing | cleaning and dehydration tank of the drum type washing-drying machine of this invention vertically at the approximate center part of the front-back direction, and shows a bottom wall surface. It is sectional drawing which cut | disconnects the washing | cleaning and dehydration tank of the drum type washing-drying machine of this invention vertically at the approximate center part of the front-back direction, and shows a bottom wall surface. It is sectional drawing which cut | disconnects the washing | cleaning and dehydration tank of the drum type washing-drying machine of this invention vertically at the approximate center part of the front-back direction, and shows a bottom wall surface.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an external view of a drum type washing / drying machine according to an embodiment of the present invention. FIG. 2 is a side view showing the internal structure, and FIG. 3 is a view showing a washing / drying main unit including a washing / dehydrating tub, an outer tub, and a motor to show the internal structure.

  Reference numeral 1 denotes a housing constituting the outer shell. The housing 1 is mounted on a base 1h, and includes a left side plate 1a, a right side plate (not shown), a front cover 1c, a back cover 1d, a top cover 1e, and a lower front cover 1f. The left and right side plates 1a and 1b are connected by a U-shaped upper reinforcing material (not shown), a front reinforcing material (not shown), and a rear reinforcing material (not shown), and include a base 1h. A box-shaped housing 1 is formed and has sufficient strength as a housing.

  9 is a door which closes the insertion port for putting in and taking out the clothes provided in the approximate center of the front cover 1c, and is supported by the hinge provided in the front reinforcement material so that opening and closing is possible. When the door opening button 9d is pressed, the lock mechanism (not shown) is released to open the door, and when the door is pressed against the front cover 1c, the door is locked and closed. The front reinforcing member has a circular opening for putting clothes in and out concentrically with an opening of the outer tub described later.

  Reference numeral 6 denotes an operation panel provided in the upper center of the housing 1 and includes a power switch 39, a start switch 12, an operation button switch 13, and a display 14. The operation panel 6 is electrically connected to a control device 38 provided at the lower part of the housing 1.

  3 is a cylindrical washing and dewatering tub (rotary drum) supported rotatably, and has a large number of through holes for water flow and ventilation in the cylindrical outer peripheral wall 3d, and clothes are taken in and out on the front end face. An opening 3a is provided for this purpose. A fluid balancer 3c integrated with the washing and dewatering tub 3 is provided outside the opening 3a. The bottom wall 3e of the washing and dewatering tub 3 is formed with a plurality of radial ridges 3f extending from the center to the outer edge. A plurality of lifters 3b extending in the axial direction are provided inside the outer peripheral wall 3d. The rotation center axis of the washing and dewatering tub 3 is inclined so that the horizontal or opening 3a side becomes higher.

  Reference numeral 2 denotes a cylindrical outer tub, which coaxially encloses the washing / dehydrating tub 3, opens on the front surface, and attaches the motor 4 to the outer center of the rear end surface. The rotating shaft of the motor 4 passes through the outer tub 2 and is connected to the center of the bottom wall 3 e of the washing and dewatering tub 3. An outer tub cover 2d is provided at the opening on the front surface, and water can be stored in the outer tub. In the center of the front side of the outer tub cover 2d, there is an opening 2c for taking in and out clothing. The opening provided in the main opening 2c and the front reinforcing material (not shown) is connected by a rubber bellows 10, and the outer tub 2 is sealed with water by closing the door 9. A drain port 2b is provided at the bottom bottom of the outer tub 2 and a drain hose 26 is connected thereto. A drain valve (not shown) is provided in the middle of the drain hose 26. Water is stored in the outer tank 2 by closing the drain valve and supplying water, and the drain valve is opened to drain the water in the outer tank 2 outside the machine. To discharge.

  The outer tub 2 is supported in a vibration-proof manner by a suspension 5 (consisting of a coil spring and a damper) whose lower side is fixed to the base 1h. The upper side of the outer tub 2 is supported by an auxiliary spring (not shown) attached to the upper reinforcing member, and prevents the outer tub 2 from falling in the front-rear direction.

  FIG. 4 is a longitudinal sectional view showing the bottom wall 3 e of the washing and dewatering tub 3.

  When the washing and dewatering tub 3 is rotated during washing and drying, the clothes are lifted along the outer peripheral wall 3d by the lifter 3b and centrifugal force, and repeatedly move so as to fall by gravity.

  The clothing lifted by the lifter 3b rubs against the protrusion 30 provided on the flat portion of the bottom wall 3e (arrow 20). In addition, when falling, it falls while rubbing against the protrusion 30 of the bottom wall 3e (arrow 21). By repeating such movement, not only the effect of washing by dropping but also the effect of scrubbing can be obtained, and the effect of removing dirt from clothes is improved. In addition, since the rotating drum repeats forward and reverse rotation during washing, not only the effect of tapping by dropping but also the effect of scrubbing can be obtained, and the effect of removing dirt from clothes is improved.

  FIG. 5 is a form example of the protrusion shape of the bottom wall 3e of the washing and dewatering tub 3 relating to the first embodiment, and the AA sectional view shows the sectional shape of the protrusion. This embodiment is characterized by a protrusion 30a having a quadrangular pyramid shape, and a plurality of protrusions 30a are arranged side by side on the bottom wall 3e. The length W1 of one side of the bottom of the quadrangular pyramid is 17 mm, and the height H1 is 4 mm.

  The higher the height H1 of the protrusion 30a, the higher the cleaning effect. However, the bottom wall 3e is formed by drawing with a stainless steel plate having a thickness of 0.6 mm. It is the optimum dimension that can be drawn without causing defects such as cracks. In addition, since it can be formed without the need for a large press die, it does not require a significant change in manufacturing equipment and capital investment. In other examples described later, the optimum dimension is determined for the same reason.

  FIG. 6 is another form example of the protrusion shape of the bottom wall 3e of the washing and dewatering tub 3 relating to the second embodiment, and the BB cross-sectional view shows the cross-sectional shape of the protrusion. The present embodiment is characterized by ribs 30b having concentric ribs on a circular arc line, and a plurality of protrusions 30b are arranged at regular intervals on the bottom wall 3e. The rib width W2 of the arc line is 6 mm, and the rib height H2 is 3 mm.

  FIG. 7 shows another example of the protrusion shape of the washing / dehydrating tub 3 bottom wall 3e according to the third embodiment, and the CC cross-sectional view shows the cross-sectional shape of the protrusion. The present embodiment is characterized by a protrusion 30c in the form of a rib parallel to a straight line parallel to one of the plurality of radial ridges 3f extending from the center of the bottom wall 3e to the outer edge. And a plurality of bottom walls 3e are arranged at regular intervals. The rib width W3 is 6 mm, and the height H3 is 3 mm.

  FIG. 8 shows another example of the protrusion shape of the bottom wall 3e of the washing / dehydrating tub 3 relating to the fourth embodiment, and the DD sectional view shows the sectional shape of the protrusion. The present embodiment is characterized by a hemispherical protrusion 30d, and a plurality of protrusions 30d are arranged side by side on the bottom wall 3e. The hemispherical circle has a diameter W4 of 20 mm and a height H4 of 4 mm.

  As described above, according to the above-described embodiment, when the rotating drum rotates, the clothes swept up by the lifter have protrusions on the bottom wall (quadrangular pyramid, rib-shaped concentric circle on the arc line, linear protrusion, hemispherical It is lifted while rubbing against the protrusions, and when falling, it falls while rubbing against the protrusions on the bottom wall. The effect is improved.

DESCRIPTION OF SYMBOLS 1 Case 2 Outer tub 3 Washing / dehydration tub 3b Lifter 3d Outer peripheral wall 3e Bottom wall 30 Protrusion

Claims (5)

A rotating drum for storing clothing; a lifter provided on an inner peripheral surface of the rotating drum; an outer tub for storing the rotating drum and arranged on the same core as the rotating drum and storing water for washing; In a drum-type washing machine having a motor that drives a drum and a housing that supports the outer tub,
Having a plurality of raised portions extending radially from the center on the bottom wall of the rotating drum;
A drum-type washing machine having a plurality of protrusions having a convex shape. In the drum type washing machine according to claim 1,
The drum-type washing machine having a plurality of convex protrusions arranged in a quadrangular pyramid shape. In the drum type washing machine according to claim 1,
The drum-type washing machine according to claim 1, wherein the protrusions having the convex shape have rib shapes arranged concentrically on an arc line. In the drum type washing machine according to claim 1,
The drum-type washing machine according to claim 1, wherein the protrusion having a convex shape has a plurality of straight protrusions arranged in parallel. In the drum type washing machine according to claim 1,
The drum-type washing machine, wherein the protrusion having the convex shape has a plurality of hemispherical protrusions arranged side by side.

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