201116661 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種在滾筒式洗衣機中提升洗濯時的洗 淨力者。 【先前技術】 滾筒式洗衣機係具有例如日本特開2008-125804號公 報（專利文獻1 )所示的構成。 該滾筒式洗衣機係具有：收納洗濯物之旋轉滾筒、內 置可自由旋轉的旋轉滾筒處之貯留洗濯水之外槽、旋轉驅 動洗濯內槽之驅動馬達、及防振支撐外槽之防振機構。 旋轉滾筒係具有：圓筒狀的胴體、胴體後端側的底壁 、設置在前述胴體的前側端側之前側補強環、及被支撐在 前側補強環之環狀流體平衡器等。 此外’在日本特開2005-3 34565號公報（專利文獻2 )所示之滾筒式洗衣機中’爲了減低清洗不均勻，在旋轉 滾筒內周以等間隔配置撥起洗濯物之揚昇器（lifter )， 並在該揚昇器間設置比揚昇器高度爲低之長度小的揚昇器 〇 此外’在日本特開2〇〇5_253 567號公報（專利文獻3 )所示之滾筒式洗衣機中，以洗濯物不會集中到一邊並且 能夠充分攪拌的方式，在旋轉滾筒底面設置旋轉構件，在 該旋轉構件設置複數個突起體。 201116661 [先前技術文獻] [專利文獻] [專利文獻1]日本特開2008-125804號公報 [專利文獻2]日本特開2005-334565號公報 [專利文獻3]日本特開2005-253567號公報 【發明內容】 (發明所欲解決之課題） 在滾筒式洗衣機洗淨附著在衣類之髒污之情況下，由 於是將機械力施予到衣類來進行藉由機械力所爲的洗淨方 法’因此洗淨的狀況係受到旋轉滾筒的內徑大小大幅影響 〇 亦即，若爲滾筒式洗衣機，衣類係在旋轉滾筒的內側 設置複數個揚昇器，利用旋轉滾筒的旋轉撥起衣類而使衣 類從旋轉滾筒內徑的最大高度落下，而將機械力施予到衣 類進行洗濯之洗淨方式，爲了有效去除衣類髒污，必須加 大旋轉滾筒的內徑。 但是，當將旋轉滾筒的內徑加大時，必然也會使洗衣 機本體變大，而會有對於一般住宅的設置造成困難的問題 0 因此，要求在不加大旋轉滾筒內徑的情況下，將去除 附著在衣類的髒污，而且也可以減少清洗不均勻之機械力 施予到衣類》 本發明之目的在不加大旋轉滾筒內徑的情況下，謀求 -6- 201116661 衣類髒污去除的清洗不均勻減低或是洗淨力提升。 (解決課題之手段） 爲了達成上述目的，本發明係一種滾筒式洗衣機， 係具有：收納衣類之旋轉滾筒；設置在前述旋轉滾筒 內周面之複數個揚昇器；收納前述旋轉滾筒並與旋轉滾筒 配置在同芯上，貯留洗濯用水之外槽；驅動前述旋轉滾筒 之馬達；及支撐前述旋轉滾筒之框體的滾筒式洗衣機，其 特徵爲：在前述旋轉滾筒連接前述馬達旋轉軸之旋轉滾筒 的底壁具有從中央呈放射狀延伸之複數支***部，並且在 前述底壁的平坦部具有複數個凸形狀的突起。 (發明之效果） 根據本發明，當旋轉滾筒進行旋轉時，被揚昇器所撥 起的衣類係一邊與底壁的突起搓合一邊被舉起，此外，在 落下時也一邊與底壁的突起搓合一邊落下。藉此，不只是 藉由落下所達成的拍洗效果，也可以得到搓洗效果，提升 衣類髒污去除的效果。 【實施方式】 以下，針對本發明之一實施形態，使用圖面加以説明 (實施例1 ) 201116661 第1圖係本發明之一實施形態例之滾筒式洗濯乾燥機 的外觀圖。第2圖係顯示內部構造的側面圖，第3圖係用 以顯示內部構造，顯示包含洗濯兼脫水槽、外槽、馬達之 洗濯乾燥本體單元的圖面。 1爲構成外廓之框體。框體1係被安裝在基座lh之 上，由左側板1 a、右側板（未圖示）、前面蓋件1 c、背 面蓋件Id、上面蓋件le、及下部前面蓋件If所構成。左 右側板1 a、1 b係利用：3字型的上補強材（未圖示）、前 補強材（未圖示）、及後補強材（未圖示）加以接合，包 含基座lh而形成箱狀的框體1，作爲框體具有充分的強 度。 9爲閉蓋設置在前面蓋件lc之大致中央之用以取出 放入衣類的投入口的門扉，利用設置在前補強材的鉸鏈而 以可自由開閉的方式予以支撐。藉由按壓門扉開啓按鈕 9d，使鎖定機構（未圖示）脫開而打開門扉，藉由將門扉 朝前面蓋件〗c按壓而被鎖定而關閉。前補強材係以與後 述的外槽開口部同心之方式，具有用以取出放入衣類的圓 形開口部。 6爲設置在框體1上部中央的操作面板，具備電源開 關3 9、啓動開關1 2、操作按鈕開關1 3、及顯示器14。操 作面板6係與設置在框體1下部的控制裝置3 8作電性連 接。 3爲以可旋轉的方式被支撐的圓筒狀的洗濯兼脫水槽 (旋轉滾筒），在其圓筒外周壁3d具有多數個用以通水 -8- 201116661 及通風的貫穿孔，在前側端面設置用以取出放入衣類之開 口部3 a。在開口部3 a的外側係具備有與洗濯兼脫水槽3 一體的流體平衡器3 C。在洗濯兼脫水槽3的底壁3 e係形 成有從中心朝外緣部延伸之複數支放射狀的***部3 f。 在外周壁3 d的內側係設置有複數個朝軸方向延伸的揚昇 器3 b。洗濯兼脫水槽3的旋轉中心軸係呈水平或是使開 口部3 a側變高的方式呈傾斜。 2爲圓筒狀的外槽，在同軸上內含洗濯兼脫水槽3, 前面爲開口，在後側端面的外側中央安裝馬達4。馬達4 的旋轉軸係貫穿外槽2，而與洗濯兼脫水槽3的底壁3 e 中心相結合。在前面的開口部係設置外槽蓋件2d，而可 進行對外槽內的貯水。在外槽蓋件2d的前側中央係具有 用以取出放入衣類之開口部2c。本開口部2e與設置在前 補強材（未圖示）的開口部係利用橡膠製的伸縮體1 0加 以連接，藉由關閉門扉9而將外槽2作水密封。在外槽2 底面最下部係設置有排水口 2b，並連接排水管26。在排 水管26的途中係設置有排水閥（未圖示），藉由關閉排 水閥並進行給水而將水貯留在外槽2，打開排水閥使外槽 2內的水朝機外排出。 外槽2係藉由將下側固定在基座1 h的減震懸架5 ( 由線圈彈簧與減震器所構成）而被防震支撐。此外，外槽 2的上側係利用安裝在上部補強構件的輔助彈簧（未圖示 )加以支撐，防止朝外槽2的前後方向傾倒。 第4圖係顯示洗濯兼脫水槽3之底壁3 e的縱剖面圖 -9 - 201116661 在洗濯、乾燥時若旋轉洗濯兼脫水槽3，衣類係以利 用揚昇器3b與離心力順著外周壁3d被舉起，並因重力而 落下的方式反覆動作。 被揚昇器3b舉起的衣類係與設置在底壁3e之平坦部 的突起30搓合（箭號20)。此外，在落下時也一邊與底 壁3e的突起30搓合一邊落下（箭號21)。藉由反覆這 樣的動作，不只是藉由落下所達成的拍洗效果，也可以得 到搓洗效果，提升衣類髒污去除的效果。此外，洗濯中由 於旋轉滾筒反覆正反旋轉，不只是藉由落下所達成的拍洗 效果’也可以得到搓洗效果，提升衣類髒污去除的效果。 第5圖係爲關於第1實施例之洗濯兼脫水槽3底壁 3 e的突起形狀之形態例，A - A剖面圖係表示突起的剖面 形狀。本實施形態例係以形成爲四角錐的凸形狀之突起 3〇a爲特徵，在底壁3e排列配置複數個。四角錐底部的 —邊長度W1爲17mm’局度H1爲4mm。 雖然前述突起30a的前述高度HI愈高，愈提高洗淨 效果’但是由於底壁3 e係利用板厚〇 . 6 m m的不銹鋼板引 伸加工而形成，因此爲可在不會發生形成時不銹鋼板破裂 等加工不良的情況下進行引伸加工的最適尺寸。此外，由 於不需要大型的沖壓模型即可形成，因此也不需要製造設 備的大幅改變及設備投資。關於後述之其他實施例，也是 依相同理由而決定最適尺寸。 -10- 201116661 (實施例2 ) 第6圖係關於第2實施例之洗濯兼脫水槽 的突起形狀之其他形態例，B-B剖面圖係表示突 形狀。本實施形態例係以形成爲在圓弧線上呈同 形狀之突起3 Ob爲特徵，在底壁3 e以一定間隔 有複數個。圓弧線的肋寬幅W2爲6mm，肋高 (實施例3 ) 第7圖係關於第3實施例之洗濯兼脫水槽： 的突起形狀之其他形態例，C-C剖面圖係表示突 形狀。本實施形態例係以形成爲相對位在底壁3 心朝外緣部延伸的複數支放射狀***部3 f的其c 平行之在直線上並列的肋形狀的突起3 0c爲特徵 3 e以一定間隔排列配置有複數個。肋寬幅W3 ί 高度Η3爲3mm。 (實施例4 ) 第8圖係關於第4實施例之洗濯兼脫水槽： 的突起形狀之其他形態例，D-D剖面圖係表示突 形狀。本實施形態例係以形成爲半球狀的凸形 3 〇d爲特徵，在底壁3 e排列配置有複數個。半 的直徑W4爲20mm，高度H4爲4mm。 以上，根據上述實施例，當旋轉滾筒進行旋 i底壁3e 起的剖面 心圓的肋 排列配置 宴H2爲 •底壁3e 起的剖面 e之從中 3 1支呈 ，在底壁 I 6mm' |底壁3e 起的剖面 伏的突起 球狀的圓 轉時，被 -11 - 201116661 揚昇器所撥起的衣類係一邊與底壁的突起（四角錐形狀、 在圓弧線上呈同心圓的肋形狀、直線狀突起、半球狀突起 )搓合一邊被舉起，此外，在落下時也一邊與底壁的突起 搓合一邊落下，因此不只是藉由落下所達成的拍洗效果， 也可以得到搓洗效果，提升衣類髒污去除的效果。 【圖式簡單說明】 第1圖係顯示本發明之滾筒式洗濯乾燥機的外觀圖。 第2圖係顯示本發明之滾筒式洗濯乾燥機之內部構造 的側面圖。 第3圖係用以顯示本發明之滾筒式洗濯乾燥機之內部 構造，顯示包含洗濯兼脫水槽、外槽、馬達之洗濯乾燥本 體單元的圖面。 第4圖係在前後方向的大致中央部縱向切斷本發明之 滾筒式洗濯乾燥機之洗濯兼脫水槽，顯示底壁面的剖面圖 〇 第5圖係在前後方向的大致中央部縱向切斷本發明之 滾筒式洗濯乾燥機之洗濯兼脫水槽，顯示底壁面的剖面圖 〇 第6圖係在前後方向的大致中央部縱向切斷本發明之 滾筒式洗濯乾燥機之洗濯兼脫水槽，顯示底壁面的剖面圖 〇 第7圖係在前後方向的大致中央部縱向切斷本發明之 滾筒式洗濯乾燥機之洗濯兼脫水槽，顯示底壁面的剖面圖 •12- 201116661 第8圖係在前後方向的大致中央部縱向切斷本發明之 滾筒式洗濯乾燥機之洗濯兼脫水槽，顯示底壁面的剖面圖 【主要元件符號說明】 1 :框體 1 a :左側板 1 b :左側板 1 c :前面蓋件 1 d :背面蓋件 1 e :上面蓋件 1 f :下部前面蓋件 lh :基座 2 :外槽 2 b :排水口 2 c :開口部 2d :外槽蓋件 3 :洗濯兼脫水槽 3 a :開口部 3b :揚昇器 3 c :流體平衡器 3d :外周壁 3e :底壁 -13- 201116661 3f :***部 4 :馬達 5 :減震懸架 6 :操作面板 9 :門扉 1 〇 :伸縮體 1 2 :啓動開關 1 3 :操作按鈕開關 1 4 :顯示器 26 :排水管 30 :突起 30a :突起 3 8 :控制裝置 3 9 :電源開關 -14 -BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning power for lifting a washing machine in a drum type washing machine. [Prior Art] The drum type washing machine has a configuration shown in, for example, Japanese Laid-Open Patent Publication No. 2008-125804 (Patent Document 1). The drum type washing machine includes a rotary drum for storing the laundry, a tank for storing the washing water at the freely rotatable rotating drum, a drive motor for rotationally driving the inner tank, and an anti-vibration mechanism for the vibration-proof supporting outer groove. The rotary drum has a cylindrical body, a bottom wall on the rear end side of the body, a front side reinforcing ring provided on the front side end side of the body, and an annular fluid balancer supported on the front side reinforcing ring. In the drum type washing machine shown in Japanese Laid-Open Patent Publication No. 2005-3 34565 (Patent Document 2), in order to reduce the cleaning unevenness, the lifter for lifting the laundry is arranged at equal intervals on the inner circumference of the rotary drum (lifter) And a lifter having a length that is lower than the height of the lifter is provided between the lifters, and the drum type washing machine shown in Japanese Laid-Open Patent Publication No. Hei. No. 5-253567 (Patent Document 3) A rotating member is provided on the bottom surface of the rotating drum so that the washings are not concentrated on one side and can be sufficiently stirred, and a plurality of protrusions are provided in the rotating member. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2005-253565 (Patent Document 3) JP-A-2005-253567 DISCLOSURE OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION In the case where the drum type washing machine is washed and adhered to the dirt of the clothes, the mechanical force is applied to the clothes to perform the washing method by the mechanical force. The condition of the washing is greatly affected by the inner diameter of the rotating drum. That is, in the case of a drum type washing machine, the clothes are provided with a plurality of jacks on the inner side of the rotating drum, and the clothes are sorted by the rotation of the rotating drum. The maximum height of the inner diameter of the rotating drum falls, and the mechanical force is applied to the clothes for washing. In order to effectively remove the dirt of the clothes, the inner diameter of the rotating drum must be increased. However, when the inner diameter of the rotating drum is increased, the main body of the washing machine is inevitably enlarged, and there is a problem that it is difficult to set the general house. Therefore, it is required to increase the inner diameter of the rotating drum without increasing the inner diameter of the rotating drum. The dirt adhering to the clothes can be removed, and the mechanical force for uneven cleaning can be reduced to the clothes. The purpose of the present invention is to eliminate the dirt removal of the clothes of the -6-201116661 without increasing the inner diameter of the rotating drum. Uneven cleaning or increased cleaning power. In order to achieve the above object, the present invention relates to a drum type washing machine comprising: a rotating drum for storing clothes; a plurality of lifters provided on an inner circumferential surface of the rotary drum; and the rotating drum and rotating The drum is disposed on the same core, and the tank for storing the water for washing; the motor for driving the rotating drum; and the drum type washing machine for supporting the frame of the rotating drum, wherein the rotating drum is connected to the rotating drum of the rotating shaft of the motor The bottom wall has a plurality of ridges extending radially from the center, and has a plurality of convex protrusions at a flat portion of the bottom wall. (Effects of the Invention) According to the present invention, when the rotary drum rotates, the clothing that is lifted by the lifter is lifted while being engaged with the projection of the bottom wall, and the bottom and the bottom wall are also lowered when falling. The protrusions fall down on one side. In this way, not only the rinsing effect achieved by falling, but also the rinsing effect can be obtained, and the effect of removing the dirt of the clothes can be improved. [Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. (Example 1) 201116661 Fig. 1 is an external view of a drum type washing and 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 the internal structure and showing the washing and drying main unit including the washing and dewatering tank, the outer tank, and the motor. 1 is a frame that constitutes the outer contour. The frame 1 is mounted on the base lh, and is composed of a left side plate 1 a, a right side plate (not shown), a front cover member 1 c, a rear cover member Id, an upper cover member le, and a lower front cover member If Composition. The left and right side plates 1 a and 1 b are joined by a 3-shaped upper reinforcing material (not shown), a front reinforcing material (not shown), and a rear reinforcing material (not shown), and are formed by including a susceptor lh. The box-shaped frame 1 has sufficient strength as a frame. 9 is a door sill which is provided at the substantially center of the front cover member lc for taking out the input port of the garment, and is supported by the hinge provided on the front reinforcing member so as to be freely openable and closable. By pressing the sill open button 9d, the lock mechanism (not shown) is disengaged to open the sill, and the sill is closed by pressing the sill toward the front cover 〖c. The front reinforcing material has a circular opening for taking out the clothing, so as to be concentric with the opening of the outer groove to be described later. 6 is an operation panel provided at the center of the upper portion of the casing 1, and includes a power source switch 39, a start switch 1, an operation button switch 13, and a display 14. The operation panel 6 is electrically connected to a control unit 38 provided at a lower portion of the housing 1. 3 is a cylindrical washing and dewatering tank (rotary drum) which is rotatably supported, and has a plurality of through-holes for circulating water -8-201116661 and ventilation on the outer peripheral wall 3d of the cylinder, at the front end face It is provided to take out the opening portion 3a of the clothing. A fluid balancer 3 C integrated with the washing and dewatering tank 3 is provided outside the opening 3a. The bottom wall 3e of the washing and dewatering tank 3 is formed with a plurality of radial ridges 3f extending from the center toward the outer edge. A plurality of lifters 3b extending in the axial direction are provided on the inner side of the outer peripheral wall 3d. The center axis of rotation of the washing and dewatering tank 3 is inclined or inclined so that the opening portion 3a side becomes high. 2 is a cylindrical outer tank, and includes a washing and dewatering tank 3 coaxially, and has an opening at the front, and a motor 4 is attached to the outer center of the rear end surface. The rotating shaft of the motor 4 penetrates the outer tub 2 and is combined with the center of the bottom wall 3 e of the washing and dewatering tank 3. The outer tank cover member 2d is provided in the front opening portion, and water storage in the outer tank can be performed. In the center of the front side of the outer tank cover member 2d, there is provided an opening portion 2c for taking out the clothes. The opening 2e and the opening provided in the front reinforcing member (not shown) are connected by a rubber expandable body 10, and the outer groove 2 is water-sealed by closing the sill 9. A drain port 2b is provided at the lowermost portion of the bottom surface of the outer tub 2, and the drain pipe 26 is connected. A drain valve (not shown) is provided in the middle of the drain pipe 26, and water is stored in the outer tub 2 by closing the drain valve and supplying water, and the drain valve is opened to discharge the water in the outer tub 2 to the outside of the machine. The outer tub 2 is shock-proof supported by a shock absorbing suspension 5 (consisting of a coil spring and a damper) that fixes the lower side to the base 1 h. Further, the upper side of the outer tub 2 is supported by an auxiliary spring (not shown) attached to the upper reinforcing member to prevent the front groove 2 from falling in the front-rear direction. Fig. 4 is a longitudinal sectional view showing the bottom wall 3e of the washing and dewatering tank 3. Fig. 9 - 201116661 If the washing and dewatering tank 3 is rotated during washing and drying, the clothes are used to use the lifter 3b and centrifugal force along the outer peripheral wall. 3d is lifted up and moves in a way that falls due to gravity. The clothing type lifted by the lifter 3b is coupled to the projection 30 provided on the flat portion of the bottom wall 3e (arrow 20). Further, it also falls while being dropped (the arrow 21) while being folded with the projection 30 of the bottom wall 3e. By repeating such an action, it is not only by the rinsing effect achieved by the falling, but also the rinsing effect can be obtained to enhance the effect of removing dirt from the clothes. Further, in the washing, since the rotating drum is reversely rotated in the forward and reverse directions, the washing effect can be obtained not only by the rinsing effect achieved by the falling, but also the effect of removing the dirt of the clothes. Fig. 5 is a view showing an example of a shape of a projection of the bottom wall 3 e of the washing and dewatering tank 3 of the first embodiment, and a cross-sectional view of the A-A showing a cross-sectional shape of the projection. In the present embodiment, a plurality of protrusions 3〇a formed as a quadrangular pyramid are characterized, and a plurality of the projections are arranged in the bottom wall 3e. The bottom side of the quadrangular pyramid has a length W1 of 17 mm' and a degree H1 of 4 mm. Although the aforementioned height HI of the protrusion 30a is higher, the cleaning effect is improved. However, since the bottom wall 3 e is formed by the stainless steel sheet stretching process having a thickness of mm 6 mm, it is a stainless steel sheet which can be formed without occurrence. The optimum size for the extension processing in the case of poor processing such as cracking. In addition, since a large stamping model is not required, a large change in manufacturing equipment and equipment investment are not required. For the other embodiments to be described later, the optimum size is determined for the same reason. -10-201116661 (Embodiment 2) Fig. 6 is a view showing another example of the shape of the protrusion of the washing and dewatering tank of the second embodiment, and the cross-sectional view of the B-B shows the shape of the protrusion. The present embodiment is characterized in that the projections 3 Ob having the same shape on the circular arc line are formed, and the bottom wall 3 e has a plurality of spaces at regular intervals. The rib width W2 of the circular arc line is 6 mm, and the rib height is high (Example 3) Fig. 7 is another example of the shape of the protrusion of the washing and dewatering tank of the third embodiment, and the C-C sectional view shows the protruding shape. In the present embodiment, the rib-shaped projections 3 0c which are formed in a plurality of radial ridges 3 f which are oppositely positioned on the outer edge of the bottom wall 3 and which are parallel to the outer edge portion are parallel, and are rib-shaped in a straight line as the feature 3 e There are a plurality of arrangements at a certain interval. Rib width W3 ί Height Η 3 is 3mm. (Embodiment 4) Fig. 8 is a view showing another embodiment of the shape of the protrusion of the washing and dewatering tank of the fourth embodiment, and the cross-sectional view of the D-D shows the shape of the protrusion. The present embodiment is characterized by a convex shape 3 〇d formed in a hemispherical shape, and a plurality of the bottom walls 3 e are arranged in line. The half diameter W4 is 20 mm and the height H4 is 4 mm. As described above, according to the above embodiment, the rib arrangement of the cross-section of the cross-section of the bottom surface 3e of the rotary drum is arranged from the upper portion 3 of the cross-section e from the bottom wall 3e, at the bottom wall I 6mm' | When the bottom wall 3e has a spheroidal rounded shape of the cross-section, the clothing that is lifted by the -11 - 201116661 lifter has a protrusion on one side and a bottom wall (a quadrangular pyramid shape, a rib that is concentric on a circular arc line) The shape, the linear protrusion, and the hemispherical protrusion are lifted while being lifted, and when they fall, they fall while being joined to the protrusion of the bottom wall. Therefore, it is possible not only by the rinsing effect achieved by dropping, but also by The effect of washing is to improve the effect of removing dirt from clothing. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the appearance of a drum type washing and drying machine of the present invention. Fig. 2 is a side view showing the internal structure of the drum type washing and drying machine of the present invention. Fig. 3 is a view showing the internal structure of the drum type washing and drying machine of the present invention, showing a washing and drying body unit including a washing and dewatering tank, an outer tank, and a motor. Fig. 4 is a cross-sectional view showing the bottom wall surface of the drum type washing and drying machine of the present invention in a longitudinal direction in a substantially central portion in the front-rear direction, and shows a cross-sectional view of the bottom wall surface in the longitudinal direction. The washing and dewatering tank of the drum-type washing and drying machine of the invention shows a cross-sectional view of the bottom wall surface. FIG. 6 is a longitudinal direction of the drum-type washing and drying machine of the present invention cut at a substantially central portion in the front-rear direction, showing the bottom. Fig. 7 is a cross-sectional view showing the bottom wall surface of the drum type washing and drying machine of the present invention cut longitudinally at a substantially central portion in the front-rear direction, and shows a sectional view of the bottom wall surface. 12-201116661 Fig. 8 is in the front and rear direction A substantially central portion cuts the washing and dewatering tank of the drum type washing and drying machine of the present invention in a longitudinal direction, and shows a sectional view of the bottom wall surface. [Main element symbol description] 1 : Frame 1 a : Left side plate 1 b : Left side plate 1 c : Front cover 1 d : Back cover 1 e : Upper cover 1 f : Lower front cover lh : Base 2 : Outer groove 2 b : Drain 2 c : Opening 2d : Outer cover 3 : Washing Dewatering tank 3 a : opening 3b: lifter 3c: fluid balancer 3d: outer peripheral wall 3e: bottom wall-13-201116661 3f: ridge 4: motor 5: shock absorbing suspension 6: operation panel 9: sill 1 〇: expandable body 1 2 : Start switch 1 3 : Operation push button switch 1 4 : Display 26 : Drain pipe 30 : Projection 30a : Projection 3 8 : Control device 3 9 : Power switch - 14