201026924 六、發明說明： 【明所屬^】 發明領域 本發明係有關於具有外箱之滾筒式洗衣機。 【先前标;J 發明背景 第6圖係特開2007-195859號公報所記載之習知滾筒式 洗衣機501的立體圖。滚筒式洗衣機5〇1具有外箱121。實際 D 上具有箱形狀的外箱121包含有：設置於前面的操作面板 5、設置於前面的前面罩112、被覆前面罩112下方的前面下 部罩113、安裝有腳部114A的腳台114、設置於上面的上面 罩111、設置於右側面的右側面板1〇2、及設置於左側面的 左侧面板101。操作面板配置有各種操作鍵或顯示器。於前 面罩112安裝有門體2。上面罩in、前面罩112、前面下部 罩113、腳台114係由容易加工之合成樹脂構件所構成。右側 面板102與左側面板1〇1係由具較大強度之鋼板所構成，並設 β 置成左右對稱。外箱121具有實質上之縱長的直方體形狀。 第7圖係構成外箱121之框體121Α的立體圖。框體121Α 係由外箱121除去上面罩丨丨卜前面罩112、前面下部罩113、 腳台114、腳部114A等由合成樹脂構件所構成之部分的部 分。在左側面板101與右側面板1〇2之前面部之間，插入固 疋有4板框板103。如板框板1〇3可自由開閉地以軸支撑門 體2。Η體2具有以耐熱玻璃等透明構件所構成之透視窗體 53、及將透視窗體53保持於内側之門體52。 3 201026924 在左側面板1 〇 1與右側面板丨02之上面部之間，插入固 定有上前部補強板105及上後部補強板1〇6。在左側面板1〇1 與右側面板102之前面下方部之間，則插入固定有前部補強 板104。藉此，構成為框體121Α。上述前板框板1〇3、上前 部補強板105、上後部補強板106、前部補強板1〇4係由鋼板 所構成。 滚筒式洗衣機501中’由於構成外箱121之構件係由右 側面板102及左側面板ιοί所支持，故須對於右側面板1〇2及 左側面板101要求強度。另一方面，從外箱121之輕量化、 省資源之點來看’使用於右側面板1〇2及左側面板101等之 鋼板的板厚又需為較薄。為了滿足前述要求，在右側面板1〇2 及左側面板101形成有複數之上下方向的凹部12〇。當側面板 101、102之板厚為〇.6mm時，凹部120之深度為lnrni前後。 在外箱121之剛性較小的情況下，滚筒以高速旋轉進行 脫水運轉時，側面板1〇1、102會大幅振動。特別是側面板 101、102之固有振動數接近脫水運轉時之振動數的側面板 101、102會進行共振，振動會變得更大。為了能耐於前述 振動’則難以使構成側面板101、102的鋼板薄化。 又，在開啟門體2的狀態下，從門體2上方或外箱121上 方施加大量荷重時，該等荷重皆由側面板1(Π、102所支持， 因此難以使構成側面板101、102的鋼板薄化。 t 明内J 發明概要 本發明之滾筒式洗衣機包含有外箱、收納於外箱之滚 201026924 筒、及收納於外箱之馬達。外箱具有由鋼板所構成的側面 板’在側面板則設有沿水平長方向延伸之複數凹部。複數^ 凹部在上下方向的寬度大於複數凹部中彼此相鄰凹部間的 部分在前述上下方向之寬度。 由於側面板具有較大的剛性，故本發明之滾筒式洗衣 機即使提高滾筒之旋轉數’也不會引起大幅度的振動。 圖式簡單說明 第1A圖係本發明實施型態之滚筒式洗衣機的立體圖。 第1B圖係實施型態之滾筒式洗衣機的截面圖。 第2A圖係實施型態之滾筒式洗衣機之侧面板的正面圖。 第2B圖係第2A圖所示之側面板之線2B-2B的截面圖。 第2C圖係實施型態之側面板的共振頻率。 第3A圖係實施型態之其他側面板的正面圖。 第3B圖係第3A圖所示之側面板之線3B-3B的截面圖。 第4A圖係實施型態之另一側面板的正面圖。 第4B圖係第4A圖所示之侧面板之線4B-4B的截面圖。 第5A圖係實施型態之另一側面板的正面圖。 第5B圖係第5A圖所示之側面板之線5B-5B的截面圖。 第知之滾筒式洗衣機的立體圖。 第7圖係構成習知滾筒式洗衣機外箱之框體的立體圖。 C實施令式】 較佳實施例之祥細說明 第1A圖及馀 第1Β圖分別為本發明實施型態之滚筒式洗 ^機1〇G1的立題圖及截面®。如第ΙΑϋ所示，滾筒式洗衣 201026924 機1001具有實質上為縱長之直方體形狀的外箱41。外箱41 包含有：設置於上面的上面罩30、設置於前面上方的操作 面板31、設置於前面中央的前面罩33、設置於前面下方的 前面下部罩34、設置於下方的腳台35、及設置於側面的側 面板36、56。在操作面板31設有操作按鈕或顯示部。而在 前面罩33則安裝有門體32。在腳台35安裝有腳部39 ^側面 板36、56係由實質上縱長之矩形狀鋼板所構成，與腳台35 一起支撐外箱41全體的重量。側面板35、56與前面罩33相連。 滾筒式洗衣機1001包含有：外箱41、收納於外箱的水 槽82、將水槽82固定於外箱42的懸吊裝置84、固定於水槽 82的馬達81、收納於水槽82的滚筒83、及驅動馬達81的驅 動部85。滚筒83係構成為開閉門體32可收納衣類等洗滌 物。亦即，懸吊裝置84、馬達81及滾筒83係收納於外箱41。 而滾筒83藉由驅動部85所驅動之馬達81，可以旋轉軸“為 t心地旋轉，而將洗滌物洗淨並脫水。 在側面板36，形成有：把手部38，係搬運滾筒式洗衣 機1001時可將手插入者；及平面部4〇，係可貼上印刷有提 醒使用者在制上需注意之點的貼紙者。在側面板％之把 手部38及平面部40以外的部分，形成有延伸於水平之長方 向1001A的複數凹部37。複數凹部37從側面板％之表面 的前方緣36C設置至後方緣36D為止。側面板％也與侧面板 36—樣，形成有複數的凹部。藉由凹部37可提高侧面板％ 56全體面的剛性。 第2A圖係側面板36的正面圖。第2B圖係第^圖所示之 201026924 側面板36之線2B_2B的截面圖。侧面板％具有表面36a、與 表面36A相反面的表面36B。在側面板36之表面36A，設有 沿著水平長方向1001A延伸之複數凹部37。且側面板％具有 位在複數凹部37中彼此相鄰之凹部37間、連接凹部37的部 分87。凹部37具有：凹面37A，係側面板％之表面36a的一 部分者；及凸面37B，係凹面37A之反面者。凸面37B為表 面36B的一部分。側面板36之部分87具有：表面87A，係表 面36A之一部分者，及表面87B，係表面87八之反面者。表 面87B為表面36B的一部分。側面板36之部分87的表面87A 連接凹部37之凹面37A ’而表面87B則連接凹部37之凸面 37B。凹部37具有上下方向1〇〇1B之寬度p。而凹部37之凹 面37A則具有深度Q。又，彼此相鄰之凹部37間的部分87具 有上下方向1001B的寬度T。凹部37可藉由壓製作為側面板 36、56的鋼板而加工成形。藉由上述工程，凹部η會塑性 變形’而部分87則不變。外箱41由於具有實質上縱長之直 方體狀，故側面板36(56)係水平方向（凹部37之長方向1〇〇1 a) 的寬度大於上下方向1001B的寬度。 凹部37的寬度P係設定為大於凹部37間之部分87的寬 度T。亦即，複數凹部37之上下方向的寬度p大於複數凹部 37中彼此相鄰之凹部37間之部分87的寬度τ。藉此，侧面板 36(56)塑性變形部分（凹部37)的面積可大於未變形部分87 的面積，可提高側面板36(56)的面剛性。 製作側面板36(56)之實施例的試料。實施例之試料由板 厚〇.6mm的鋼板構成，複數凹部37之數為η，凹部36之上下 7 201026924 方向_的寬度P約為50mm ’凹面37A的深度Q約為 3.5mm。 狄又，藉由板厚〇.6mm的鋼板製作如以圖所示之習知滾 筒式洗衣機5〇1之側板102的比較例試料。在比較例之試料 延伸於上下方向之凹部丨2〇的數為4 ,凹部的深度為 1mm ° 實施例試料與比較例試料之振動的共振頻率如第2C 圖。實施例試料之—次共振頻率、二次共振頻率、三次共 振頻率、四次共振鮮皆高於比㈣試料。以接近第2匸圖 所示之共振頻率振動側面板36、1〇2時，侧面板36、1〇2會 大幅振動’且外箱的振動也會變大。 脫水運轉時之滾筒83的旋轉數通常在16〇〇r/min前後， 振動數為26.6Hz。比較實施例試料之一次共振頻率 37.6Hz，比較例試料之一次共振頻率18 8較接近前述振動數 26.6Hz。因此，比起習知之滚筒式洗衣機5〇1，具有側面板 36(56)之實施型態的滚筒式洗衣機1〇〇1在托水運轉時較不 易產生振動。 藉由形成複數之凹部37 ’可提高侧面板36的面剛性， 並可提高側面板36的共振頻率，避開脫水運轉時的振動頻 率而可減少外箱41的振動。因此，可提高脫水旋轉數、減 少脫水運轉時間，而可使侧面板36較薄而以較少的材料形 成側面板36。 側面板36具有上下方向1001B之寬度大於水平方向之 寬度的實質上為縱長之矩形。因此，若決定凹部37之寬度p 201026924 為預定值，則可於側面板36設置較多的凹部37，而可提高 側面板36的面剛性。 使側面板36之外周緣（例如後方緣36D)與凹部37的距 離S小於凹部37的寬度P。藉此，塑性變形之部分（凹部37) 的面積可盡可能的增加，藉此可更提高側面板36的面剛性。 第3A圖係實施型態之其他側面板136的正面圖。第3B 圖係第3A圖所示之侧面板136之線3B-3B的載面圖。第3A圖 與第3B圖中，對於與第2A及2B圖所示之側面板36相同部分 φ 附加相同的元件符號，並省略其說明。 側面板136具有與第2A及2B圖所示之側面板36相同形 狀的外周緣。在側面板136形成有凹部137，代替第2A及2B 圖所示之側面板36的凹部37。凹部137與凹部37在上下方向 1001B之載面形狀不同，凹部137具有實質上為圓弧形狀的 截面。藉此’可減低側面板136在上下方向1001B上的材料 伸展率，可減低壓製時的輕曲或變形。又，由於可減低壓 製時收縮模具的力，故也可抑制設備投資並且可提高側面 ® 板136的共振頻率。在實施型態上，圓弧形狀的半徑R約為 9mm，最大深度Q約為3.5mm。 第4A圖係實施型態之其他側面板236的正面圖。第4B 圖係第4A圖所示之側面板236之線4B-4B的截面圖。第4A圖 與第4B圖中，對於與第3A及3B圖所示之側面板136相同部 分附加相同的元件符號，並省略其說明。 側面板236具有與第3A及3B圖所示之側面板136相同 形狀的外周緣。在側面板236形成有凹部237，代替第3A及 201026924 3B圖所示之側面板136的凹部137。凹部237與第2A及2B圖 同樣地在上下方向1001B具有圓弧形狀的截面。凹部237與 凹部37在長方向1001A之兩端部的形狀不相同，凹部237具 有半圓弧形、亦即圓弧形狀的兩端部237C、237D。由於藉 由半圓派形狀的兩端部237C、237D，凹部237可具有平緩 的凹面’故可減少壓製時的翹曲或變形。在實施型態上， 凹部237的寬度P約為50mm，最大深度Q約為3.5mm，兩端 部237C、237D之圓弧形狀的半徑v約為25mm。 第5A圖係實施型態之其他側面板336的正面圖。第5B φ 圖係第5Α圖所示之側面板336之線5Β-5Β的截面圖。第5Α圖 與第5Β圖中，對於與第3Α及3Β圖所示之側面板136相同部 分附加相同的元件符號，並省略其說明。 側面板336具有與第3Α及3Β圖所示之側面板136相同 形狀的外周緣。在側面板336形成有凹部337，代替第3Α及 3Β圖所示之側面板136的凹部137。凹部337與第2Α及2Β圖 同樣地在上下方向1001Β具有圓弧形狀的截面。凹部337與 凹部37在長方向1001Α之兩端部的形狀不相同，凹部337之 〇 長方向上之兩端部337C、337D具有沿著側面板336之外緣 336C、336D的形狀。此外，在兩端部337C、337D，設有相 對於長方向1001A傾斜預定角度至凹部337之底的傾斜面 45。藉此，由於側面板336之表面336係平緩地連接於凹部 337之底，故可減少壓製時的麵曲或變形，並且可減低脫水 運轉時的振動’且具有優美的外觀。在實施型態上，凹部 337的寬度P約為50mm，深度Q約為3.5mm。 10 201026924 另外，本發明並不限定於前述實施型態。 r:圖式簡單說明3 第1A圖係本發明實施型態之滾筒式洗衣機的立體圖。 第1B圖係實施型態之滾筒式洗衣機的截面圖。 第2A圖係實施型態之滾筒式洗衣機之側面板的正面圖。 第2B圖係第2A圖所示之側面板之線2B-2B的截面圖。 第2C圖係實施型態之側面板的共振頻率。 第3A圖係實施型態之其他側面板的正面圖。 ® 第3B圖係第3A圖所示之側面板之線3B-3B的截面圖。 第4A圖係實施型態之另一側面板的正面圖。 第4B圖係第4A圖所示之側面板之線4B-4B的截面圖。 第5A圖係實施型態之另一側面板的正面圖。 第5B圖係第5A圖所示之側面板之線5B-5B的截面圖。 第6圖係習知之滾筒式洗衣機的立體圖。 第7圖係構成習知滚筒式洗衣機外箱之框體的立體圖。 【主要元件符號說明】 2...門體 36、56...側面板 5...操作面板 36A、36B...表面 30...上面罩 36C...前方緣 31...操作面板 36D...後方緣 32...門體 37...凹部 33...前面罩 37A...凹面 34...前面下部罩 37B...凸面 35...腳台 3 8...把手部 11 201026924 39...腳部 114A...腳部 40...平面部 120...凹部 41…外箱 121...外箱 45...傾斜面 121A...框體 52...門框 136...側面板 53...透視窗體 137...凹部 81…馬達 236...側面板 81A...旋轉軸 237..•凹部 82...水槽 237C、237D...兩端部 83...滾筒 336…側面板 84...懸吊裝置 336A...表面 85...驅動部 336C、336D...外緣 87...側面板36之部分 337··.凹部 87A、87B…表面 337C、337D.··兩端部 101...左側面板 501...習知之滾筒式洗衣機 102...右側面板 1001··.滾筒式洗衣機 103...前板框板 1001A...長方向 104...前部補強板 1001B...上下方向 105...上前部補強板 Ρ、τ...寬度 106...上後部補強板 Q...深度 111...上面罩 R...半徑 112…前面罩 S...距離 113.. .前面下部罩 114.. .腳台 V...半徑 12201026924 VI. Description of the invention: [Brief of the invention] Field of the Invention The present invention relates to a drum type washing machine having an outer casing. [Background of the Invention] J BACKGROUND OF THE INVENTION FIG. 6 is a perspective view of a conventional drum type washing machine 501 described in Japanese Laid-Open Patent Publication No. 2007-195859. The drum type washing machine 5〇1 has an outer box 121. The outer box 121 having a box shape in the actual D includes: an operation panel 5 provided at the front, a front cover 112 provided at the front, a front lower cover 113 covering the lower portion of the front cover 112, and a foot 114 to which the leg portion 114A is attached. The upper cover 111 provided on the upper surface, the right side panel 1〇2 provided on the right side surface, and the left side panel 101 provided on the left side surface. The operation panel is configured with various operation keys or displays. The door body 2 is attached to the front cover 112. The upper cover in, the front cover 112, the front lower cover 113, and the foot 114 are composed of a synthetic resin member which is easy to process. The right side panel 102 and the left side panel 1〇1 are composed of a steel plate having a large strength, and β is set to be bilaterally symmetrical. The outer casing 121 has a substantially elongated rectangular parallelepiped shape. Fig. 7 is a perspective view showing a frame 121 of the outer case 121. The casing 121 is a portion of the outer casing 121 from which the upper cover 112, the front lower cover 113, the leg 114, and the leg portion 114A are formed of a synthetic resin member. Between the left side panel 101 and the front surface of the right side panel 1〇2, a four-plate frame 103 is inserted. For example, the frame plate 1〇3 can freely open and close to support the door body 2 with a shaft. The body 2 has a see-through window 53 made of a transparent member such as heat-resistant glass, and a door body 52 that holds the see-through window 53 inside. 3 201026924 The upper front reinforcing plate 105 and the upper rear reinforcing plate 1〇6 are inserted between the left side panel 1 〇 1 and the upper surface of the right side panel 丨02. A front reinforcing plate 104 is inserted and fixed between the left side panel 1〇1 and the lower surface of the front surface of the right side panel 102. Thereby, it is comprised as the frame 121Α. The front plate frame 1〇3, the upper front reinforcing plate 105, the upper rear reinforcing plate 106, and the front reinforcing plate 1〇4 are formed of a steel plate. In the drum type washing machine 501, since the members constituting the outer case 121 are supported by the right side panel 102 and the left side panel ιοί, strength is required for the right side panel 1〇2 and the left side panel 101. On the other hand, from the viewpoint of weight reduction and resource saving of the outer casing 121, the thickness of the steel sheets used for the right side panel 1〇2 and the left side panel 101 needs to be thin. In order to satisfy the above requirements, a plurality of concave portions 12A in the upper and lower directions are formed in the right side panel 1A2 and the left side panel 101. When the thickness of the side panels 101, 102 is 〇.6 mm, the depth of the recess 120 is lnrni. When the rigidity of the outer casing 121 is small, the side panels 1〇1, 102 vibrate greatly when the drum is rotated at a high speed for dehydration operation. In particular, the side panels 101 and 102 whose natural vibration numbers of the side panels 101 and 102 are close to the number of vibrations during the dehydration operation resonate and the vibration becomes larger. In order to withstand the above vibration, it is difficult to make the steel sheets constituting the side panels 101 and 102 thin. Further, when a large amount of load is applied from above the door body 2 or above the outer box 121 in a state where the door body 2 is opened, the loads are supported by the side panels 1 (Π, 102, and thus it is difficult to constitute the side panels 101, 102). The present invention relates to a drum type washing machine including an outer case, a roll 201026924 which is housed in an outer case, and a motor housed in the outer case. The outer case has a side panel made of a steel plate. The side panel is provided with a plurality of recesses extending in the horizontally long direction. The width of the plurality of recesses in the up and down direction is greater than the width of the portion between the recesses in the plurality of recesses in the up and down direction. Because the side panels have greater rigidity, Therefore, the drum type washing machine of the present invention does not cause a large vibration even if the number of rotations of the drum is increased. Fig. 1A is a perspective view showing a drum type washing machine in accordance with an embodiment of the present invention. Fig. 1B is an embodiment Fig. 2A is a front view of a side panel of a drum type washing machine of the embodiment. Fig. 2B is a sectional view of a side panel 2B-2B shown in Fig. 2A. Fig. 2C is a front view of the side panel of the embodiment. Fig. 3A is a front view of the side panel of the side panel shown in Fig. 3A. Fig. 3B is a cross-sectional view of the side panel 3B-3B shown in Fig. 3A. Fig. 4A is a front view of the other side panel of the embodiment. Fig. 4B is a cross-sectional view of the side panel line 4B-4B shown in Fig. 4A. Fig. 5A is another side panel of the embodiment. Fig. 5B is a cross-sectional view of the side panel line 5B-5B shown in Fig. 5A. Fig. 7 is a perspective view of a frame body constituting the outer casing of a conventional drum type washing machine. C 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施The drum type washing machine 201026924 has an outer box 41 having a substantially rectangular shape in a rectangular shape. The outer box 41 includes an upper cover 30 provided on the upper surface, an operation panel 31 disposed on the upper front side, and a central portion disposed at the front center. Front cover 33, front lower cover 34 disposed at the lower front side, and foot platform disposed below 35. The side panels 36 and 56 are provided on the side. An operation button or a display portion is provided on the operation panel 31. The door body 32 is attached to the front cover 33. The leg portion 39 is mounted on the footrest 35. The 56 is composed of a substantially vertical rectangular steel plate, and supports the entire weight of the outer casing 41 together with the leg 35. The side panels 35 and 56 are connected to the front cover 33. The drum type washing machine 1001 includes an outer casing 41, The water tank 82 housed in the outer box, the suspension device 84 that fixes the water tank 82 to the outer box 42, the motor 81 fixed to the water tank 82, the drum 83 housed in the water tank 82, and the drive unit 85 that drives the motor 81. The drum 83 is a system. The opening and closing door body 32 is configured to accommodate laundry such as clothes. That is, the suspension device 84, the motor 81, and the drum 83 are housed in the outer casing 41. On the other hand, the drum 83 is rotated by the motor 81 driven by the driving unit 85 to rotate the shaft to wash and dehydrate the laundry. The side panel 36 is formed with a handle portion 38 for transporting the drum type washing machine 1001. The hand inserter can be inserted into the hand; and the flat portion can be attached with a sticker printed with a point to remind the user of the need to pay attention to the system. The handle portion 38 of the side panel and the portion other than the flat portion 40 are formed. There are a plurality of recesses 37 extending in the horizontal direction 1001A. The plurality of recesses 37 are provided from the front edge 36C of the surface of the side panel % to the rear edge 36D. The side panel % is also formed with a plurality of recesses as in the side panel 36. The rigidity of the entire surface of the side panel % 56 can be increased by the recessed portion 37. Fig. 2A is a front view of the side panel 36. Fig. 2B is a cross-sectional view of the line 2B_2B of the 201026924 side panel 36 shown in Fig. 2. A surface 36a having a surface 36a opposite to the surface 36A. The surface 36A of the side panel 36 is provided with a plurality of recesses 37 extending along the horizontal length direction 1001A. The side panels % have positions adjacent to each other in the plurality of recesses 37. Concave 37, connection The portion 87 of the portion 37. The recess 37 has a concave surface 37A which is part of the surface 36a of the side panel %, and a convex surface 37B which is the reverse side of the concave surface 37A. The convex surface 37B is a part of the surface 36B. The portion 87 of the side panel 36 has The surface 87A, which is part of the surface 36A, and the surface 87B, which is the opposite of the surface 87. The surface 87B is a part of the surface 36B. The surface 87A of the portion 87 of the side panel 36 connects the concave surface 37A' of the concave portion 37 and the surface 87B Then, the convex surface 37B of the concave portion 37 is connected. The concave portion 37 has a width p of the vertical direction 1〇〇1B, and the concave surface 37A of the concave portion 37 has a depth Q. Further, the portion 87 between the concave portions 37 adjacent to each other has a width of the up-and-down direction 1001B. T. The concave portion 37 can be formed by pressing a steel plate as the side panels 36, 56. By the above-mentioned works, the concave portion η is plastically deformed and the portion 87 is unchanged. The outer casing 41 has a substantially vertical rectangular body. The width of the side panel 36 (56) in the horizontal direction (the longitudinal direction of the concave portion 37 is 1〇〇1 a) is larger than the width of the vertical direction 1001B. The width P of the concave portion 37 is set to be larger than the width of the portion 87 between the concave portions 37. T. That is The width p of the upper portion of the plurality of recesses 37 is larger than the width τ of the portion 87 between the recesses 37 adjacent to each other in the plurality of recesses 37. Thereby, the area of the plastically deformed portion (the recess 37) of the side panel 36 (56) may be larger than The area of the deformed portion 87 can increase the surface rigidity of the side panel 36 (56). The sample of the embodiment of the side panel 36 (56) is produced. The sample of the embodiment is composed of a steel plate having a thickness of 66 mm, and the number of the plurality of recesses 37 η, the upper and lower sides of the recess 36 7 201026924 The width P of the direction _ is about 50 mm 'The depth Q of the concave surface 37A is about 3.5 mm. Di, a comparative sample of the side plate 102 of the conventional roller type washing machine 5〇1 shown in the figure was produced by a steel plate having a thickness of 6 mm. In the sample of the comparative example, the number of the concave portions 丨2〇 extending in the vertical direction was 4, and the depth of the concave portion was 1 mm. The resonance frequency of the vibration of the sample of the example and the comparative example was as shown in Fig. 2C. The samples of the example—the sub-resonance frequency, the second resonance frequency, the third resonance frequency, and the fourth-order resonance are all higher than the ratio (4) sample. When the side panels 36 and 1〇2 are vibrated at a resonance frequency as shown in Fig. 2, the side panels 36 and 1〇2 vibrate greatly, and the vibration of the outer casing also increases. The number of rotations of the drum 83 during the spin-drying operation is usually around 16 〇〇r/min, and the number of vibrations is 26.6 Hz. The primary resonance frequency of the sample of the comparative example was 37.6 Hz, and the primary resonance frequency of the comparative sample was 18 8 which was closer to the aforementioned vibration number of 26.6 Hz. Therefore, the drum type washing machine 1〇〇1 having the embodiment of the side panel 36 (56) is less likely to generate vibration during the water running operation than the conventional drum type washing machine 5〇1. By forming the plurality of concave portions 37', the surface rigidity of the side panel 36 can be increased, the resonance frequency of the side panel 36 can be increased, and the vibration frequency during the dehydration operation can be avoided, and the vibration of the outer casing 41 can be reduced. Therefore, the number of spin rotations can be increased, and the spin-drying operation time can be reduced, and the side panel 36 can be made thinner to form the side panel 36 with less material. The side panel 36 has a substantially vertically long rectangle having a width in the up-and-down direction 1001B that is larger than the width in the horizontal direction. Therefore, when the width p 201026924 of the concave portion 37 is determined to be a predetermined value, a large number of concave portions 37 can be provided in the side panel 36, and the surface rigidity of the side panel 36 can be improved. The distance S between the outer periphery of the side panel 36 (e.g., the rear edge 36D) and the recess 37 is made smaller than the width P of the recess 37. Thereby, the area of the plastically deformed portion (the recessed portion 37) can be increased as much as possible, whereby the surface rigidity of the side panel 36 can be further improved. Figure 3A is a front elevational view of the other side panels 136 of the implementation. Fig. 3B is a plan view of the line 3B-3B of the side panel 136 shown in Fig. 3A. In the third embodiment and the third embodiment, the same reference numerals are given to the same portions φ as those of the side panel 36 shown in Figs. 2A and 2B, and the description thereof is omitted. The side panel 136 has an outer periphery of the same shape as the side panel 36 shown in Figs. 2A and 2B. A recess 137 is formed in the side panel 136 instead of the recess 37 of the side panel 36 shown in FIGS. 2A and 2B. The concave portion 137 and the concave portion 37 have different shapes of the load surface in the up-and-down direction 1001B, and the concave portion 137 has a substantially circular arc-shaped cross section. Thereby, the material stretch ratio of the side panel 136 in the up and down direction 1001B can be reduced, and the light curve or deformation at the time of low pressure can be reduced. Further, since the force of shrinking the mold at the time of reducing the pressure can be reduced, the investment in equipment can be suppressed and the resonance frequency of the side plate 136 can be increased. In the embodiment, the radius R of the arc shape is about 9 mm, and the maximum depth Q is about 3.5 mm. Figure 4A is a front elevational view of the other side panels 236 of the implementation. Figure 4B is a cross-sectional view of line 4B-4B of side panel 236 shown in Figure 4A. In the fourth and fourth embodiments, the same components as those of the side panel 136 shown in Figs. 3A and 3B are denoted by the same reference numerals, and their description will be omitted. The side panel 236 has an outer circumference of the same shape as the side panel 136 shown in Figs. 3A and 3B. A recess 237 is formed in the side panel 236 instead of the recess 137 of the side panel 136 shown in Figs. 3A and 201026924 3B. Similarly to the second and second views, the concave portion 237 has a circular arc-shaped cross section in the vertical direction 1001B. The concave portion 237 and the concave portion 37 have different shapes at both end portions in the longitudinal direction 1001A, and the concave portion 237 has a semicircular arc shape, that is, both end portions 237C and 237D of an arc shape. Since the concave portions 237 can have a gentle concave surface by the both end portions 237C, 237D of the semicircular shape, warping or deformation at the time of pressing can be reduced. In the embodiment, the width P of the concave portion 237 is about 50 mm, the maximum depth Q is about 3.5 mm, and the radius v of the arc shape of the both end portions 237C, 237D is about 25 mm. Figure 5A is a front elevational view of the other side panels 336 of the implementation. The 5th φ diagram is a cross-sectional view of the line 5Β-5Β of the side panel 336 shown in Fig. 5 . In the fifth and fifth drawings, the same reference numerals will be given to the same parts as those of the side panels 136 shown in the third and third drawings, and the description thereof will be omitted. The side panel 336 has an outer circumference of the same shape as the side panel 136 shown in Figures 3 and 3A. A recess 337 is formed in the side panel 336, instead of the recess 137 of the side panel 136 shown in Figures 3 and 3A. Similarly to the second and second views, the concave portion 337 has a circular arc-shaped cross section in the vertical direction 1001Β. The concave portion 337 and the concave portion 37 have different shapes at both end portions in the longitudinal direction 1001, and both end portions 337C and 337D of the concave portion 337 in the longitudinal direction have shapes along the outer edges 336C and 336D of the side panel 336. Further, at both end portions 337C, 337D, an inclined surface 45 which is inclined by a predetermined angle with respect to the longitudinal direction 1001A to the bottom of the concave portion 337 is provided. Thereby, since the surface 336 of the side panel 336 is gently connected to the bottom of the recessed portion 337, the surface curvature or deformation at the time of pressing can be reduced, and the vibration at the time of dehydrating operation can be reduced and the appearance can be made beautiful. In an embodiment, the recess 337 has a width P of about 50 mm and a depth Q of about 3.5 mm. 10 201026924 Further, the present invention is not limited to the foregoing embodiment. r: BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a perspective view of a drum type washing machine in accordance with an embodiment of the present invention. Fig. 1B is a cross-sectional view showing a drum type washing machine of an embodiment. Fig. 2A is a front elevational view of the side panel of the drum type washing machine of the embodiment. Fig. 2B is a cross-sectional view of the line 2B-2B of the side panel shown in Fig. 2A. Figure 2C is the resonant frequency of the side panel of the implementation. Figure 3A is a front elevational view of another side panel of the implementation. ® Figure 3B is a cross-sectional view of line 3B-3B of the side panel shown in Figure 3A. Figure 4A is a front elevational view of the other side panel of the implementation. Fig. 4B is a cross-sectional view of the side panel line 4B-4B shown in Fig. 4A. Figure 5A is a front elevational view of the other side panel of the implementation. Fig. 5B is a cross-sectional view of the side panel line 5B-5B shown in Fig. 5A. Fig. 6 is a perspective view of a conventional drum type washing machine. Fig. 7 is a perspective view showing a casing of a conventional drum type washing machine outer casing. [Main component symbol description] 2...door body 36, 56... side panel 5... operation panel 36A, 36B... surface 30... top cover 36C... front edge 31... operation Panel 36D...rear edge 32...door 37...recess 33...front cover 37A...concave surface 34...front lower cover 37B...convex surface 35...foot table 3 8. .. Handle portion 11 201026924 39...foot portion 114A...foot portion 40...planar portion 120...recessed portion 41...outer box 121...outer box 45...inclined surface 121A...frame Body 52...door frame 136...side panel 53...perspective window 137...recess 81...motor 236...side panel 81A...rotation shaft 237..•recess 82...sink 237C 237D... both ends 83...roller 336...side panel 84...suspension device 336A...surface 85...driver 336C,336D...outer edge 87...side panel 36 Part 337··.Recessed portions 87A, 87B...Surface 337C, 337D.··End portions 101...Left panel 501...Preferred drum type washing machine 102...Right side panel 1001··.Drum type washing machine 103 ...front plate frame 1001A...long direction 104...front reinforcing plate 1001B...up and down direction 105...upper front reinforcing plate Ρ, τ...width 106...upper rear part Strong board Q...depth 111... top cover R...radius 112...front cover S...distance 113.. .front lower cover 114.. .foot V...radius 12