1310330 ⑴ 九、發明說明 【發明所屬之技術領域】 本發明爲門的開閉構造及具備該門的開閉構造之工作 機械。更詳細地說，是輔助門藉由鉸鏈而可摺疊地安裝於 主門之門的開閉構造及具備該門的開閉構造之工作機械。 【先前技術】 傳統上，工作機械之其中一種的加工中心，在作爲地 基（foundation)的基座（base)上具備：採用切削刀具對工件 (被加工物）執行加工的機械本體，並在該基座上具備：包 覆機械本體之局部或全部的保護擋板。該保護擋板，是防 止從配設於基座之上部的旋轉工作台、或機械本體所飛散 的切削粉末或冷卻液（切削液）飛散至外部周圍的構件。 該保護擋板的前面具有開口部，透過該開口部，作業 者可執行被設於基座上的工作台上之工件的裝卸作業。該 開口部，通常具備可開閉的前側門。舉例來說，1 9 9 2年日 本新型公開第5 73 52號公報所記載之工作機械的防濺護具 已爲大眾所知悉。該防濺護具，是將藉由鉸鏈而可摺疊地 把次要門（輔助門）安裝於主要門（主門）側部的前側門（門單 元），可自由開閉地安裝在防濺護具本體前面之開口部的 内面。使上述次要門的遊動端側，卡止於設在上述防濺護 具本體之上面側的導板的圓弧狀導溝，而於門開啓啓時將 次要門的遊動端側朝主要門的後方導引而形成摺疊。 但是’在上述工作機械的防濺護具中，設於導板的導 -4 - (2) 1310330 溝’在彼此垂直之2條直線的垂直部分具有以圓弧連接的 形狀。如此一來，譬如在作業者用力開閉主要門的場合中 ，當次要門的遊動端側通過導溝的圓弧部分時，恐有對該 遊動端側作用過大的力量而導致破損之虞。不僅如此，由 於次要門之遊動端側的導軸無法平滑地通過導溝，也具有 令作業者感到主門之把手變沉重的問題點。 【發明內容】 t [發明欲解決之課題] 本發明的目的是提供一種：即使作業者用力開閉主門 ，也不致對從動於主門之輔助門的遊動端側作用負荷的門 的開閉構造及具備該門的開閉構造之工作機械。 [解決課題之手段] 爲達成上述的目的，申請專利範圍第1項的發明之門 的開閉構造，具備··設於包圍機械本體的罩體之壁的開口 部；及可開閉該開口部的一對門，前述一對門具備：主門 ，該主門是設成可沿著前述壁的内面而自由開閉；及輔助 門，該輔助門可藉由鉸鏈而可摺疊地連結於該主門的側端 部，而連結於前述側端部的連結部之相反側的遊動端部的 上部，可沿著設於前述罩體的上面側之導板的導溝移動’ 在「當前述主門開啓時，前述輔助門的前述遊動端部側’ 藉由沿著前述導溝而朝前述主門之後方移動的方式’使前 述輔助門一邊相對於前述主門而旋轉並一邊形成彎折」之 -5- (3) 1310330 門的開閉構造中，前述導溝具備導引前述輔助門的形狀， 該導引前述輔助門的形狀，當前述主門的開閉速度形成一 定時，可使前述輔助門的旋轉角速度形成一定。 根據申請專利範圍第1項發明之門的開閉構造，當主 門沿著壁的内面開啓時，藉由輔助門之遊動端部的上部沿 著導板之導溝移動的方式，使該遊動端部側朝主門的後方 移動。如此一來，輔助門可一邊旋轉一邊藉由鉸鏈形成彎 折。導溝具備導引的形狀，該導引的形狀當主門的開閉速 度形成一定時，可使輔助門的旋轉角速度形成一定。藉此 ，輔助門的角速度不會激烈地變快或變慢，能以以定的速 度旋轉。如此一來，可防止對輔助門之遊動端部的上部作 用過大的負荷所造成的損傷。 申請專利範圍第2項發明之門的開閉構造，在前述主 門開啓時，前述輔助門之前述遊動端部的上部，從前述導 溝的起始端起沿著終端移動’該終端側爲曲線狀。 根據申請專利範圍第2項發明之門的開閉構造，在用 力開啓主門的場合中，由於輔助門之遊動端部的上部沿著 導溝的曲線狀終端側移動’相較於直線的形狀，可限制遊 動端側的旋轉速度。如此一來’可防止對輔助門之遊動端 部的上部作用過大的負荷所造成的損傷。 申請專利範圍第3項及第4項發明之門的開閉構造’在 前述輔助門之前述遊動端部的上部設有：支持部’該支持 部朝向前述罩體的内側並略水平地延伸；及卡止部’該卡 止部係從上述支持部的前端上方突出’並卡止於前述導溝 -6- (4) 1310330 而形成滑動。 根據申請專利範圍第3項及第4項發明之門的開閉構造 •，從輔助門之遊動端部的上部略水平地朝罩體内側延伸之 支持部的前端設有卡止部，故當滑動開啓主門之際，可使 輔助門的遊動端側形成偏移（offset)。如此一來，不會直 接將負荷作用於輔助門之遊動端部的上部，且可使輔助門 快速地對主門形成摺疊。 申請專利範圍第5項及第6項發明之門的開閉構造，前 t 述導溝之前述終端側的形狀，在前述主門之行程長度爲L ，前述輔助門的寬度爲R的場合中，前述遊動端部的上部 是沿著前述卡止部的移動路徑形成，該卡止部之移動路徑 是指：沿著計算式 X^SL/TOsin’Y/FO + IUvA (1-(Y/R)2)-1) 所表示之路徑移動時的移動路徑。 根據申請專利範圍第5項及第6項發明之門的開閉構造 ，藉由使遊動端部的上部沿著前述路徑移動的方式，當以 _ 一定的速度開閉主門時，可使輔助門的旋轉角速度形成一 定。導溝之終端側的形狀，是沿著前述輔助門於旋轉時之 卡止部的移動路徑所形成。如此一來，藉由使卡止部一邊 沿著導溝滑動並一邊移動的方式，可使輔助門之遊動端部 的上部以一定的角速度旋轉。 申請專利範圍第7項及第8項發明之門的開閉構造，前 述導溝之前述起始端側的形狀是形成：面對前述主門的開 閉方向而水平地延伸的直線狀。 根據申請專利範圍第7項及第8項發明之門的開閉構造 (5) 1310330 ，在令輔助門旋轉之前，藉由使輔助門之遊動端部的卡止 部沿著直線狀之導溝的起始端側導引的方式，可防止輔助 門於主門開啓時突然開始旋轉。不僅如此，由於以導溝之 直線狀的起始端側使輔助門平行移動，能以保持該移動速 度的狀態而在旋轉動作中直接移動，因此輔助門可獲得平 滑的旋轉動作。 申請專利範圍第9〜1 2項發明之門的開閉構造，連結 前述導溝之前述起始端側與前述終端側的部分，是形成圓 弧狀。 根據申請專利範圍第9〜1 2項發明之門的開閉構造， 可在導溝之直線狀的起始端側與曲線狀的終端側之間，使 移動之後的輔助門在保持其移動速度狀態下平滑地產生旋 轉。 申請專利範圍第13項及第14項發明之門的開閉構造， 在連結於前述輔助門側之主門的一端部設有擋塊，該擋塊 於前述主門開啓時，抵接於面向一端部之前述罩體之壁的 內面，而使前述主門與前述輔助門所構成的角度形成9 0度 及9 0度以上。 申請專利範圍第1 3項及第1 4項發明之門的開閉構造， 是利用主門的擋塊，來限制主門的移動寬度而使主門與輔 助門所構成的角度形成90度及9〇度以上。舉例來說，倘若 沒有該擋塊，有時主門與輔助門所構成的角度將形成90度 以下。在該場合中，將使已移動至導溝之終端的卡止部略 朝起始端側後退。假設，倘若作業者用力開啓主門時，自 -8- (6) 1310330 於該卡止部的後退動作急速地產生，恐有對設置於輔助門 之遊動端部上部的支持部及卡止部作用負荷而導致損傷之 虞。本發明可藉由防止上述卡止部之後退現象的方式，消 除作用於支持部及卡止部的負荷。 申請專利範圍第1 5項發明之具備門的開閉構造之工作 機械，具備：加工工件的機械本體；和包圍該機械本體之 加工範圍的保護罩體；和設於該罩體之壁的開口部；和可 開閉該開口部之前述的一對門；及設於前述保護罩體之上 面側的前述導板，並具備申請專利範圍第1〜1 4項之其中 任一項所記載之門的開閉構造。 申請專利範圍第1 5項發明之具備門的開閉構造之工作 機械，其保護罩體之壁的開口部是由一對門形成開閉。該 一對門是由主門與輔助門所形成。不僅如此，由於該工作 機械具備申請專利範圍第1〜14項之其中任一項所記載之 門0開閉構造，因此當主門以一定的速度形成開閉時，輔 助門的旋轉速度不會急速地變快或變慢，能以一定的速度 旋轉。如此一來，可防止大量負荷作用於輔助門之遊動端 部的上部所造成的損傷。不僅如此，即使在作業者用力地 以一定的速度開閉主門的場合中，由於輔助門的旋轉速度 不會急速地變化，可防止大量的負荷作用於輔助門的上部 【實施方式】 以下，針對本發明之一種實施形態的加工中心1 ’根 -9 ~ (7) 1310330 據圖面進行說明。第1圖爲加工中心1之整體的立體圖。第 2圖爲保護擋板3的立體圖。第3圖，是從上側後方觀看保 護擋板3之前面的立體圖（中間分隔板30省略）。第4圖，是 從門單元20的前面側觀看的立體圖。第5圖爲門單元20的 後視圖。第6圖爲導板80的俯視圖。第7圖是顯示輔助門60 之旋轉軌跡的説明圖。第8圖爲保護擋板3的前視圖（開口 部1〇:關閉狀態）。第9圖爲保護擋板3的前視圖（開口部10 :半開啓狀態）。第1 〇圖爲保護擋板3的前視圖（開口部1 0 •全開狀％ )。桌11圖爲第3圖所不之A— A線箭頭方向的 剖面圖（開口部1 0 :關閉狀態）。第1 2圖爲第3圖所示之A —A線箭頭方向的剖面圖（開口部1 〇 :全開狀態）。第丨3圖 是第8圖所示之B— B線箭頭方向的剖面圖。第14圖是第9 圖所示之C - C線箭頭方向的剖面圖。第1 5圖爲第1 0圖所 示之D- D線箭頭方向的剖面圖。 本實施形態的加工中心1，在保護擋板3之前側壁3 a 的開口部10具備門單元20(請參考第2圖）。該門單元20是 由：主門40及輔助門60所形成，該主門40可面對開口部10 而平行地移動，而該輔助門60可自由旋轉地連結於該主門 4〇，並可從動於主門40而一邊旋轉一邊彎折。不僅如此， 輔助門60隔著支持部65而在其遊動端部61的上部具有卡止 軸66，該卡止軸66沿著設於保護擋板3之上面的導板80的 導溝8 1形成滑動。藉此輔助門60可形成平滑的旋轉動作。 本實施形態，其上述導板8 0之導溝8 1的形狀具有本發明的 特徴。 -10- (8) 1310330 首先，針對加工中心1的槪略構成進行說明。第1圖所 示的加工中心1，是可藉由使圖面中未顯示的工件與刀具 形成相對移動的方式，對工件實施所期望的機械加工（譬 如：「硏磨」、「鑽孔」、「切削」等）的工作機械。該 加工中心1的主體是由：作爲基台的鐵製基座2;和設於該 基座2的上部，可加工工件的機械本體（圖面中未顯示）； 及固定於前述基座2的上部，並可包覆機械本體及基座2上 部的箱狀保護擋板3所構成。保護擋板3，在其後方具備： 內藏著可控制加工中心1的動作之控制基盤（圖面中未顯示 )的控制箱7。控制箱7，在其上部具備：下面形成開口之 俯視角度呈横長的箱狀構件，且在其内部收納著反饋電阻 或冷卻風扇等的電阻保護罩8。第1圖所示的保護擋板3相 當於「保護罩體」。 其次，針對基座2進行說明。基座2呈Y軸方向較長 的略立方體狀，是藉由使鑄鐵之類的金屬材料流入鑄模内 所成型。基座2之下部的四個角落分別具備可調整高度的 脚部2a，並藉由將上述4個脚部2a設置於工場等之地面的 方式，將加工中心1設置於特定場所。 基座2在其上部的略中央處具備工作台裝置5。該工作 台裝置5的主體是由：未顯示圖示的基座；和採用軸套而 可自由旋轉地支持於該基座的心軸；及在該心軸的上部固 定成同心狀，並可與心軸一體旋轉的旋轉工作台所構成。 旋轉工作台在其上面兩端側具備：以旋轉軸作爲對稱的中 心所配置的一對工件保持部（圖面中未顯示）。如此一來， -11 - (9) 1310330 由於可在對保持於其中一個工件保持部的工件實施加工的 狀態下，將其他的工件保持於另一個工件保持部，故可縮 短作業時間。 不僅如此’雖然圖面中未顯示，但在基座2之上部後 方側的兩個角落，設有作爲略呈立方體狀之座台的一對立 柱座部’並於該立柱座部上固定著延伸於Z軸方向的立柱 。於該立柱組裝有：可沿著該立柱之前面移動的主軸頭， 於該主軸頭的下部組裝有：設成可自由旋轉的主軸，於該 主軸的前端組裝有：可自由裝卸地裝卸刀具的刀具交換裝 置等。因此’在基座2上具備：由立柱、主軸頭、主軸及 刀具交換裝置等所形成的機械本體，並由固定於基座2上 的保護擋板3包覆其周圍。 接下來，針對保護擋板3進行說明。如第2圖所示，保 護擋板3在底面的局部形成開口而略呈箱狀，並由板金所 形成的前側壁3 a、右側壁3 b、左側壁3 c、頂壁3 d (請參考 第1圖）及後側壁3 e構成主體。前側壁3a在靠近左側處， 具有正面視角略呈長方形之用來執行工件裝卸的開口部10 。開口部10具備由一對門所形成的門單元20。該門單元20 具備：開閉式的主門4〇 ;及輔助門60，該輔助門60是藉由 鉸鏈25(請參考第3圖）連結於該主門40的連結端部42(面向 右側壁3b的一端部，請參考第4圖），並隨著主門40的移 動而形成從動。針對門單元20的詳細構造將於稍後說明。 如第3圖所示，前側壁3a的内面，在開口部10的上端 部附近具有沿著該上端部的上側導軌35，在下端部附近具 -12- (10) 1310330 有沿著該下端部的下側導軌36。主門40在其上部具備：從 上下方向包夾上側導軌35，並於上側導軌35上產生旋轉的 旋轉滾子單元50。主門40分別在其下部的兩個角落附近具 備：可沿著下側導軌36的軌道片36a(請參考第3圖）並產生 旋轉的旋轉滾子單元56。藉由上述的開閉構造，主門40可 面對開口部10而朝左右方向形成直線移動。針對輔助門60 的旋轉動作將於稍後說明。 如第1圖、第2圖所示，加工中心1在開口部1 0的右側 具備：執行加工中心1的操作、或加工程式之參數輸入等 ’且略呈三角柱狀的操作箱13。從該操作箱13所延伸的配 線（圖面中未顯示），是通過保護擋板3的下側而連接於控 制箱7内的控制裝置（圖面中未顯示）。前側壁3a在其上部 左側的角落部’具備：塔型的警示燈19(請參考第1圖参照 ’在第2圖中省略其圖示），該塔型的警示燈19可將加工中 心1的錯誤動作通知作業者。 右側壁3 b及左側壁3 c (請參考第1〜3圖）分別具有長方 形的開口部1 4 ’該開口部1 4具備：固定成可自由裝卸的檢 查艙口 15。藉由卸下該檢查艙口 15可開啓開口部14，透過 該開口部1 4可執行：位於工作台裝置5的旋轉工作台上之 工件的裝卸作業、或機械本體的維修檢查等。 頂壁3d具有：構成機械本體的主軸頭（圖面中未顯示 );和執行該主軸頭之配線處理的纜線（圖面中未顯示）； 及用來檢視刀具交換裝置之刀具庫馬達（圖面中未顯示）等 的上部’且從俯視角度觀看略呈長方形的開口部9。該開 -13- (11) 1310330 口部9具備箱狀的罩體18’該罩體18覆蓋著：從該開口部9 朝上方突出之各種裝置的上部。 在頂壁3d的前方也具備：從俯視角度觀看略呈長方 形的開口部11。開口部11具有：固定於右側前方的角落部 ，且從俯視角度觀看略呈梯形的導板80。該導板80是包覆 該角落部的周圍，並將輔助門60的遊動端部61 (請參考第4 圖）導引至右側壁3b側的構件。在稍後的說明中提到：該 導板80具有略呈圓弧狀的導溝81，從輔助門60之遊動端部 61的上部經由支持部65而朝上方突出的卡止軸66，是從下 側卡止於該導溝8 1。藉由該卡止軸6 6沿著導溝8 1滑動的方 式，可使輔助門60的遊動端部61相對於主門40而旋轉。針 對導板80之導溝81的形狀特徴將於稍後說明。 接著’針對保護擋板3之内側的構造進行說明。如第1 圖、第2圖所示，保護擋板3在前側壁3a的後方具備：豎 立設置成平行於前側壁3a，用來分隔機械本體之加工範圍 且從正面視角觀看略呈長方形的中間分隔板3 0。中間分隔 板30在其右側具有：用來執行機械本體之維修檢査等的開 口部3 1，該開口部3 1具備可開閉的門3 3。在該中間分隔板 30與基座2的上部之間，形成有特定的間隙27(請參考第1 圖），基座2在該間隙27具備工作台裝置5。如此一來，旋 轉工作台上之一端側的工件裝卸部位於中間分隔板3 0的内 側’另一端側的工件裝卸部則位於中間分隔板3 〇的外側。 藉此’即使其中一側的工件在加工中的狀況下，也能在另 一側的工件裝卸部執行工件交換。 -14- (12) 1310330 設於基座2之後端側上部的機械本體（圖面中未顯示） ，是位於中間分隔板3 0的内面側。該機械本體是由圖面中 * 未顯示的立柱、主軸頭、主軸、刀具交換裝置等構成主體 。該機械本體，可藉由根據操作箱13所設定的加工程式， 使已安裝刀具的主軸形成高速旋轉的方式，對固定於工作 台裝置5之旋轉工作台上的工件實施所需的加工。 如第3圖所示，右側壁3b在其内面，於固定在前側壁 3a之上側導軌35及下側導軌36的各端部附近，分別具備1310330 (1) Description of the Invention [Technical Field] The present invention relates to an opening and closing structure of a door and a working machine including the opening and closing structure of the door. More specifically, it is an opening and closing structure in which the auxiliary door is foldably attached to the door of the main door by a hinge, and a working machine having the opening and closing structure of the door. [Prior Art] Conventionally, a machining center of one of the working machines has, on a base as a foundation, a mechanical body that performs machining on a workpiece (worked object) by using a cutting tool, and The base is provided with a protective baffle that covers part or all of the mechanical body. The protective baffle is a member that prevents the cutting powder or the cooling liquid (cutting fluid) scattered from the rotating table disposed on the upper portion of the base or the mechanical body from scattering to the outside. The front surface of the protective baffle has an opening through which the operator can perform an attachment or detachment operation of the workpiece on the table provided on the susceptor. The opening usually has a front side door that can be opened and closed. For example, the splash guard of the working machine described in Japanese Laid-Open Patent Publication No. 5 73 52 is known to the public. The splash guard is a front side door (door unit) that foldably mounts a secondary door (auxiliary door) to the side of the main door (main door) by a hinge, and can be freely opened and closed to be installed in the splash guard The inner surface of the opening with the front of the body. The swimming end side of the secondary door is locked to the arcuate guide groove of the guide plate provided on the upper surface side of the splash guard body, and the swimming end side of the secondary door is mainly oriented when the door is opened The rear of the door is guided to form a fold. However, in the splash guard of the above working machine, the guides - 4 - (2) 1310330 grooves provided in the guide plates have a shape in which they are connected in a circular arc at perpendicular portions of two straight lines perpendicular to each other. In this case, for example, when the operator opens and closes the main door with force, when the swimming end side of the secondary door passes through the arc portion of the guide groove, there is a fear that the excessive force acts on the swimming end side to cause breakage. In addition, since the guide shaft on the swimming end side of the secondary door cannot smoothly pass through the guide groove, the operator feels that the handle of the main door is heavy. [Problem to be Solved by the Invention] An object of the present invention is to provide an opening and closing structure for a door that acts on a swimming end side of an auxiliary door that is driven by a main door even if an operator opens and closes the main door with force. And a working machine having an opening and closing structure of the door. [Means for Solving the Problem] In order to achieve the above-described object, the opening and closing structure of the door of the invention of the first aspect of the invention includes an opening provided in a wall surrounding the cover of the machine body, and an opening that can open and close the opening a pair of doors, the pair of doors having: a main door that is configured to be freely openable and closable along an inner surface of the wall; and an auxiliary door that is foldably coupled to the side of the main door by a hinge In the end portion, the upper portion of the swimming end portion opposite to the coupling portion connected to the side end portion is movable along the guide groove of the guide plate provided on the upper surface side of the cover body "in the case where the main door is opened The side of the swimming end portion of the auxiliary door is moved to the rear of the main door along the guide groove, and the auxiliary door is rotated while being bent relative to the main door. - (3) 1310330 In the opening and closing structure of the door, the guide groove has a shape for guiding the auxiliary door, and the shape of the auxiliary door is guided, and when the opening and closing speed of the main door is constant, the rotation of the auxiliary door can be performed. Angular velocity formation Set. According to the opening and closing structure of the door of the invention of claim 1, when the main door is opened along the inner surface of the wall, the swimming end is moved by the upper portion of the swimming end of the auxiliary door along the guide groove of the guide plate. The side moves toward the rear of the main door. In this way, the auxiliary door can be bent by the hinge while rotating. The guide groove has a guiding shape, and the shape of the guide can form a constant angular velocity of the auxiliary door when the opening and closing speed of the main door is constant. Thereby, the angular velocity of the auxiliary door is not drastically fastened or slowed, and can be rotated at a constant speed. As a result, it is possible to prevent damage caused by an excessive load on the upper portion of the swimming end portion of the auxiliary door. In the opening and closing structure of the door according to the second aspect of the invention, when the main door is opened, the upper portion of the swimming end portion of the auxiliary door moves along the terminal from the start end of the guide groove, and the terminal side is curved. . According to the opening and closing structure of the door of the invention of claim 2, in the case where the main door is opened with force, the upper portion of the swimming end portion of the auxiliary door moves along the curved terminal side of the guide groove as compared with the shape of the straight line. The rotation speed of the swimming end side can be limited. In this way, it is possible to prevent damage caused by an excessive load acting on the upper portion of the swimming end portion of the auxiliary door. The opening and closing structure of the door of the third aspect and the fourth invention of the invention is provided in the upper part of the swimming end of the auxiliary door: a support portion that extends toward the inner side of the cover and extends slightly horizontally; The locking portion 'the locking portion protrudes from above the front end of the support portion' and is locked by the guide groove -6-(4) 1310330 to form a slide. According to the opening and closing structure of the door of the third and fourth inventions of the patent application, the front end of the support portion extending from the upper portion of the auxiliary end of the auxiliary door to the inside of the cover is provided with a locking portion, so that the sliding portion is provided When the main door is opened, the swimming end side of the auxiliary door can be offset. As a result, the load is not directly applied to the upper portion of the swimming end of the auxiliary door, and the auxiliary door can be quickly folded toward the main door. In the opening and closing structure of the door according to the fifth and sixth inventions of the patent application, the shape of the terminal side of the front guide groove is such that when the stroke length of the main door is L and the width of the auxiliary door is R, The upper portion of the swimming end portion is formed along a moving path of the locking portion, and the moving path of the locking portion means: along the calculation formula X^SL/TOsin'Y/FO + IUvA (1-(Y/R ) 2)-1) The movement path when the indicated path moves. According to the opening and closing structure of the door according to the fifth and sixth inventions of the patent application, by moving the upper portion of the swimming end portion along the path, when the main door is opened and closed at a constant speed, the auxiliary door can be The rotational angular velocity is formed to be constant. The shape of the terminal side of the guide groove is formed along the movement path of the locking portion when the auxiliary door is rotated. In this manner, the upper portion of the swimming end portion of the auxiliary door can be rotated at a constant angular velocity by sliding the locking portion along the guide groove and moving it. In the opening and closing structure of the door according to the seventh and eighth aspects of the invention, the shape of the leading end side of the guide groove is formed in a straight line extending horizontally in the opening/closing direction of the main door. According to the opening and closing structure (5) 1310330 of the door of the invention of claims 7 and 8, the locking portion of the swimming end of the auxiliary door is along the linear guide groove before the auxiliary door is rotated. The starting end side guide prevents the auxiliary door from suddenly starting to rotate when the main door is opened. Further, since the auxiliary door is moved in parallel by the linear starting end side of the guide groove, the movement can be directly moved in the rotation operation while maintaining the moving speed, so that the auxiliary door can obtain a smooth rotation operation. In the opening and closing structure of the door of the invention of the ninth to fifteenth invention, the portion on the side of the start end and the end side of the guide groove is formed in a circular arc shape. According to the opening and closing structure of the door of the invention of claim 9 to 12, the auxiliary door after the movement can be maintained at the moving speed between the linear starting end side of the guide groove and the curved end side. Smooth rotation. In the opening and closing structure of the door of the invention of claim 13 and 14, a stopper is provided at one end of the main door connected to the auxiliary door side, and the stopper abuts against the one end when the main door is opened. The inner surface of the wall of the cover body is formed such that the angle formed by the main door and the auxiliary door is 90 degrees and 90 degrees or more. The opening and closing structure of the door of the inventions of the first and third inventions is to use the stopper of the main door to limit the movement width of the main door so that the angle formed by the main door and the auxiliary door is 90 degrees and 9 More than the temperature. For example, if there is no such block, the angle formed by the main door and the auxiliary door will sometimes be less than 90 degrees. In this case, the locking portion of the terminal that has moved to the guide groove is retracted slightly toward the starting end side. It is assumed that if the operator opens the main door with force, the retracting action of the locking portion from -8-(6) 1310330 will be rapidly generated, and there may be a support portion and a locking portion provided on the upper portion of the swimming end portion of the auxiliary door. The load is responsible for the damage. According to the present invention, the load acting on the support portion and the locking portion can be eliminated by preventing the above-described locking portion from retreating. A working machine having a door opening and closing structure according to a fifteenth aspect of the invention, comprising: a machine body for machining a workpiece; and a protective cover body surrounding a processing range of the machine body; and an opening portion provided in a wall of the cover body And a pair of doors that can open and close the opening; and the guide plate provided on the upper surface side of the protective cover, and having the opening and closing of the door according to any one of claims 1 to 14. structure. In the working machine having the door opening and closing structure according to the fifteenth aspect of the invention, the opening of the wall of the protective cover is opened and closed by a pair of doors. The pair of doors are formed by a main door and an auxiliary door. In addition, since the working machine has the door opening and closing structure described in any one of the first to fourth aspects of the patent application, when the main door is opened and closed at a constant speed, the rotation speed of the auxiliary door does not rapidly increase. Faster or slower, can rotate at a certain speed. As a result, it is possible to prevent a large amount of load from being applied to the damage caused by the upper portion of the swimming end of the auxiliary door. In addition, even when the operator opens and closes the main door at a constant speed, the rotation speed of the auxiliary door does not change rapidly, and a large amount of load can be prevented from acting on the upper portion of the auxiliary door. [Embodiment] The machining center 1 'root -9 ~ (7) 1310330 according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view of the entire machining center 1. Fig. 2 is a perspective view of the protective shutter 3. Fig. 3 is a perspective view of the front surface of the protective baffle 3 viewed from the upper rear side (the intermediate partition plate 30 is omitted). Fig. 4 is a perspective view as seen from the front side of the door unit 20. Figure 5 is a rear view of the door unit 20. Fig. 6 is a plan view of the guide plate 80. Fig. 7 is an explanatory view showing a rotation locus of the auxiliary door 60. Fig. 8 is a front view of the protective shutter 3 (opening 1 〇: closed state). Fig. 9 is a front view of the protective shutter 3 (opening 10: half-open state). The first drawing is a front view of the protective shutter 3 (opening 10 0 • fully open %). The table 11 is a cross-sectional view in the direction of the arrow A-A in the third figure (opening 1 0: closed state). Fig. 1 is a cross-sectional view taken along the line A-A of the arrow shown in Fig. 3 (opening 1 〇: fully open state). Fig. 3 is a cross-sectional view taken along the line B-B of the arrow shown in Fig. 8. Fig. 14 is a cross-sectional view taken along the line C - C of the arrow shown in Fig. 9. Fig. 15 is a cross-sectional view taken along the line D-D of the arrow shown in Fig. 10. The machining center 1 of the present embodiment includes the door unit 20 in the opening portion 10 of the side wall 3 a before the protection of the baffle plate 3 (please refer to FIG. 2 ). The door unit 20 is formed by a main door 40 and an auxiliary door 60 that can move in parallel to the opening 10, and the auxiliary door 60 is rotatably coupled to the main door 4〇, and It can be bent from the main door 40 while rotating. Moreover, the auxiliary door 60 has a locking shaft 66 at the upper portion of the swimming end portion 61 via the support portion 65, and the locking shaft 66 is along the guide groove 8 1 of the guide plate 80 provided on the upper surface of the protective shutter 3. Form a slip. Thereby the auxiliary door 60 can form a smooth rotating motion. In the present embodiment, the shape of the guide groove 8 1 of the guide plate 80 has the features of the present invention. -10- (8) 1310330 First, the outline of the machining center 1 will be described. The machining center 1 shown in Fig. 1 can perform desired machining (such as "honing" and "drilling" on the workpiece by moving the workpiece not shown in the drawing relative to the tool. , "cutting", etc.) work machine. The main body of the machining center 1 is: an iron base 2 as a base; and a mechanical body (not shown) which can be machined on the upper part of the base 2; and is fixed to the base 2 The upper part is formed by covering the mechanical body and the box-shaped protective baffle 3 at the upper part of the base 2. The protective baffle 3 is provided at the rear thereof with a control box 7 in which a control base (not shown in the drawing) for controlling the operation of the machining center 1 is housed. The control box 7 is provided with a box-shaped member having a horizontally long viewing angle at the lower surface of the control box 7, and a resistance protective cover 8 such as a feedback resistor or a cooling fan is housed therein. The protective baffle 3 shown in Fig. 1 corresponds to the "protective cover". Next, the susceptor 2 will be described. The susceptor 2 has a slightly cubic shape elongated in the Y-axis direction and is formed by flowing a metal material such as cast iron into the mold. Each of the four corners of the lower portion of the susceptor 2 is provided with a leg portion 2a having a height adjustable, and the machining center 1 is placed at a specific place by placing the four leg portions 2a on the floor of a factory or the like. The susceptor 2 is provided with a table device 5 at a slightly center of its upper portion. The main body of the table device 5 is: a base not shown; and a spindle that is rotatably supported by the base by a sleeve; and is fixed concentrically at an upper portion of the spindle, and It is composed of a rotary table that rotates integrally with the mandrel. The rotary table has, on the upper end sides thereof, a pair of workpiece holding portions (not shown in the drawing) arranged with the rotating shaft as a center of symmetry. In this way, -11 - (9) 1310330 can keep the other workpieces in the other workpiece holding portion while the workpiece held in one of the workpiece holding portions is processed, so that the working time can be shortened. Not only that, although not shown in the drawing, a pair of upright seat portions ' as a substantially cubic seat block are provided at two corners on the rear side of the upper portion of the base 2, and are fixed to the column base portion. A column extending in the Z-axis direction. The column is assembled with a spindle head that is movable along the front surface of the column, and a spindle that is freely rotatable is assembled at a lower portion of the spindle head, and a front end of the spindle is assembled: a detachable tool for loading and unloading the tool Tool changer, etc. Therefore, the base 2 is provided with a mechanical body formed of a column, a spindle head, a spindle, a tool changer, and the like, and is covered by a protective shutter 3 fixed to the base 2. Next, the protective baffle 3 will be described. As shown in Fig. 2, the protective baffle 3 has an opening in a part of the bottom surface and is slightly box-shaped, and is formed by a sheet metal front side wall 3 a, right side wall 3 b, left side wall 3 c, and top wall 3 d (please Referring to Fig. 1) and the rear side wall 3 e constitute a main body. The front side wall 3a is near the left side, and has an opening portion 10 having a substantially rectangular front view for performing workpiece loading and unloading. The opening 10 has a door unit 20 formed of a pair of doors. The door unit 20 includes: an open-close type main door 4〇; and an auxiliary door 60 connected to the joint end portion 42 of the main door 40 by a hinge 25 (refer to FIG. 3) (facing the right side wall) At the end of 3b, please refer to FIG. 4), and follow the movement of the main door 40 to form a slave. The detailed configuration for the door unit 20 will be described later. As shown in Fig. 3, the inner surface of the front side wall 3a has an upper side rail 35 along the upper end portion in the vicinity of the upper end portion of the opening portion 10, and has a -12-(10) 1310330 along the lower end portion near the lower end portion. Lower side rails 36. The main door 40 is provided at its upper portion with a rotating roller unit 50 that covers the upper rail 35 from the vertical direction and that rotates on the upper rail 35. The main door 40 is provided at two corners of its lower portion, respectively, along the rail piece 36a of the lower side rail 36 (refer to Fig. 3) and produces a rotating rotating roller unit 56. With the above-described opening and closing structure, the main door 40 can face the opening portion 10 and form a linear movement in the left-right direction. The rotation action for the auxiliary door 60 will be described later. As shown in Fig. 1 and Fig. 2, the machining center 1 is provided with an operation box 13 having a triangular prism shape, which is an operation of the machining center 1, or a parameter input of a machining program, etc., on the right side of the opening 10. The wiring extending from the operation box 13 (not shown in the drawing) is a control device (not shown in the drawing) that is connected to the inside of the control box 7 by the lower side of the protection panel 3. The front side wall 3a is provided with a tower-type warning light 19 at the corner portion 'on the upper left side thereof (please refer to FIG. 1 for reference to 'not shown in FIG. 2), and the tower type warning lamp 19 can process the machining center 1 The wrong action informs the operator. The right side wall 3b and the left side wall 3c (see Figs. 1 to 3) each have a rectangular opening portion 1 4'. The opening portion 14 has a check hatch 15 that is fixed to be detachably attachable. The opening portion 14 can be opened by removing the inspection hatch 15, and the opening portion 14 can be used to perform loading and unloading work of the workpiece on the rotary table of the table device 5, maintenance inspection of the machine body, and the like. The top wall 3d has: a spindle head constituting the mechanical body (not shown in the drawing); and a cable (not shown) for performing wiring processing of the spindle head; and a tool magazine motor for viewing the tool exchange device ( The upper portion of the drawing is not shown in the drawing, and the opening portion 9 having a substantially rectangular shape is viewed from a plan view. The opening -13-(11) 1310330 mouth portion 9 is provided with a box-shaped cover 18' which covers an upper portion of various devices projecting upward from the opening portion 9. Also provided in front of the top wall 3d is an opening 11 having a substantially rectangular shape as viewed from a plan view. The opening portion 11 has a corner portion that is fixed to the front side of the right side, and a substantially trapezoidal guide plate 80 is viewed from a plan view. The guide plate 80 is a member that covers the periphery of the corner portion and guides the swimming end portion 61 (refer to Fig. 4) of the auxiliary door 60 to the side of the right side wall 3b. As will be described later, the guide plate 80 has a slightly arc-shaped guide groove 81, and the locking shaft 66 that protrudes upward from the upper portion of the swimming end portion 61 of the auxiliary door 60 via the support portion 65 is The guide groove 8 1 is locked from the lower side. The sliding end portion 61 of the auxiliary door 60 can be rotated relative to the main door 40 by the sliding of the locking shaft 66 along the guide groove 81. The shape of the guide groove 81 for the guide plate 80 will be described later. Next, the structure of the inner side of the protective baffle 3 will be described. As shown in FIG. 1 and FIG. 2, the protective baffle 3 is provided at the rear of the front side wall 3a so as to be erected parallel to the front side wall 3a for separating the processing range of the mechanical body and viewing the slightly rectangular middle from the frontal view. Partition 3 0. The intermediate partition plate 30 has, on the right side thereof, an opening portion 3 1 for performing maintenance inspection or the like of the mechanical body, and the opening portion 31 has an openable and closable door 3 3 . A specific gap 27 (refer to Fig. 1) is formed between the intermediate partition plate 30 and the upper portion of the susceptor 2, and the susceptor 2 is provided with the table device 5 in the gap 27. As a result, the workpiece attaching and detaching portion on one end side of the rotary table is located on the inner side of the intermediate partition 30, and the workpiece attaching and detaching portion on the other end side is located outside the intermediate partitioning plate 3'. Thereby, even if the workpiece on one side is in the process of being processed, the workpiece exchange can be performed on the other workpiece loading and unloading portion. -14- (12) 1310330 The mechanical body (not shown in the drawing) provided on the upper end side of the base 2 is located on the inner surface side of the intermediate partition plate 30. The machine body is composed of a column, a spindle head, a spindle, a tool changer, etc., which are not shown in the drawing. The machine body can perform required machining on the workpiece fixed to the rotary table of the table device 5 by rotating the spindle of the mounted tool at a high speed in accordance with the machining program set by the operation box 13. As shown in Fig. 3, the right side wall 3b is provided on the inner surface thereof, and is fixed to the vicinity of each end portion of the upper side rail 35 and the lower side rail 36 of the front side wall 3a.
I :將長方形金屬板彎折成略U字型後固定的擋塊抵接台28 、29。該擋塊抵接台28、29，是分別可供設於稍後說明之 主門40側的擋塊85、86(請參考第4圖、第5圖）抵接的座台 〇 其次，針對門單元20的構造進行說明。如第4圖、第5 圖所示，門單元20具備：主門40，該主門40是由從正面視 角觀察呈縱長狀的長方形板金所形成；及輔助門60，該輔 _ 助門60可旋轉地連結於該主門40之連結端部42(面向右側 壁3b之側邊的一端部），並由寬度較前述主門40更短，且 從正面視角觀察呈縱長狀的長方形板金所形成。藉由上述 —對的主門40及輔助門60，開閉保護擋板3之前側壁3a的 開口部1 0。以下，針對各門的構造進行說明。 首先，針對主門40的構造進行說明。如第4圖、第5圖 所示，主門40，在略中央處具有：從正面視角觀察呈縱長 狀之長方形孔的窗部44，並具備透明的樹脂板90，該透明 的樹脂板90是由固定於面向窗部44之背面側的位置的強化 -15- (13) 1310330 塑膠板所形成。如此一來，可透過窗部44觀看保護擋板3 的内側。主門40在略較左端部（關閉方向側的一端部，面 向左側壁3c之側邊的一端部）之中央更下側處，具備用來 開閉操作主門40的把手41。 主門40在其上部具備旋轉滾子單元50。旋轉滾子單元 5 0具備：滾子支持片51;和一對主滾子52;及一對輔助滾 子53。滾子支持片51，是從主門40的上端部延伸至上方且 從正面視角觀察呈横長狀的長方支持片，並分別於前面上 側的左右兩角落部具備主滾子52，且分別於前面下側的左 右兩角落部具備：與主滾子52保持特定寬度而形成分離的 輔助滾子53。上述的主滾子52及輔助滾子53，是藉由螺栓 95及螺帽96而可旋轉地固定於滾子支持片51。在上述一對 主滾子52、與一對輔助滾子53之間的上下間隙，配置有固 定於保護擋板3之前側壁3 a的上側導軌3 5 (請參考第1 1圖、 第12圖参照）。接著，上述的一對主滾子52及一對輔助滾 子53，是形成於上側導軌35的上下軌道面（圖面中未顯示） 上滑動。 主門40在其下端部具備：從該下端部延伸至下方，且 從正面視角觀察呈横長狀的長方形支持片55。支持片55分 別於前面下側的左右兩角落部具備旋轉滾子單元56。旋轉 滾子單元56具備：剖面略呈L字型的滾子支持片57;及旋 轉滾子58。滾子支持片57，是從支持片55之下端部的右端 部附近（或左端部附近）延伸至下方，且其前端部是朝向支 持片55的前方並彎折成略直角後水平地延伸。旋轉滾子58 -16- (14) 1310330 ，在垂直於滾子支持片57之略呈水平延伸的前端部的方向 上具有軸心，並可旋轉地固定於該前端部。 滾子支持片57，在固定於支持片55之側邊的一端部， 於滾子支持片57之長軸方向上具有長楕圓形的一對調節孔 57a、57a。螺栓98、98插入上述一對調節孔57a、57a，並 利用螺帽97、97而鎖緊於支持片55形成固定。在上述的固 定構造中，藉由放鬆螺帽97、97，可使滚子支持片5 7在上 下方向移動。如此一來，可調整旋轉滚子58的高度。 旋轉滾子單元56的旋轉滾子58滑動於軌道片36a的表 面上（請參考第11圖：面向前側壁3a之内面的單一面），該 軌道片36a是延伸至固定於保護檔板3之前側壁3a且剖面 略呈T字型的下側導軌36的下方。除此之外，主門4〇形成 :下端側卡止於一對旋轉滾子單元56的狀態。如此一來， 可防止主門40的下端側從前側壁3a的内面朝後方分離所 造成的搖動。 旋轉滾子單元50之滾子支持片51的右端部（輔助門60 側的一端部），朝向後方略直角地彎折成特定寬度’並在 該彎折部分的外面固定著橡膠製塊狀物的擋塊85。在設於 主門40之下端部的支持片55的右端部（輔助門60側的一端 部），也固定著橡膠製塊狀物的擋塊86°上述一對擋塊85 、86，分別在主門40已開啓的場合中’抵接在各自固定於 右側壁3b内面的擋塊抵接台28、29(請參考第3圖）。藉由 調整上述擋塊85、86的厚度’可限制主門40的開啓寬度。 如此一來，可限制輔助門60的旋轉角度。針對該輔助門60 -17- (15) 1310330 之旋轉角度的制限將於稍後說明。 接下來，針對輔助門60的構造進行說明。如第4圖、 第5圖所示，輔助門60’在主門40之連結端部42的相反側 的一端，也就是在連結端部62具備：從正面視角觀察呈縱 長帶狀的連結片69(請參考第5圖）。連結片69連結於輔助 門6 0後側的表面、與主門4 0後側之連結端部6 2的背面是由 上下一對的鉸鏈25、25所連結。如此一來，輔助門60之連 結端部6 2的相反側的端部，也就是指遊動端部6 1側可相對 於主門40旋轉。由於主門40的連結端部42、與輔助門60的 連結端部62之間的間隙被連結片69所封閉’故可防止切削 粉末或切削液的飛沫從該間隙洩漏至保護擋板3的外側。 第4圖、第5圖中所示的鉸鏈25相當於「合葉（hinge)」。 輔助門60在遊動端部61之上部的角落部具備L字型的 支持部65。該支持部65具有：第1支持片65a’該第1支持 片65a是從輔助門60之遊動端部61上側角落部附近的背面 朝向輔助門60的後方略水平地延伸；及第2支持片65b ’該 第2支持片65b是從該第1支持片65a的前端延伸至上方。 支持部65在第2支持片65b的上部具備延伸至上方的棒狀 卡止軸66。卡止軸66在上側的外徑方向周圍具備上側凸緣 部67，在下側的外徑方向周圍具備下側凸緣部68。在該上 側凸緣部67與下側凸緣部68之間，配置導板80的導溝81( 請參考第6圖）。在稍後的說明中指出該支持部6 5具備：使 輔助門60的遊動端部61產生偏移而平滑地形成旋轉的功能 。第4圖、第5圖所示的卡止軸66相當於「卡止部」。 -18- (16) 1310330 輔助門60在前面（面對開口部10的面）的右下角落部附 近，具備以螺栓64a及螺帽64b所固定的把手63 ° 接著，針對導溝8 1的形狀進行說明。如第6圖所示’ 導溝81是設於導板80的溝，並具有以保護擋板3的中央側 作爲內側之略圓弧狀的整體形狀。具體來說’該導溝81具 有3個部位，是由以下的部分所構成：直線狀的直線部82 ，該直線部82是形成於面向開口部1〇(左側壁3〇的起始端 側；和曲線部8 4，該曲線部8 4是形成於面向右側壁3 b的 終端側，並具備拋物線的局部形狀；及連結部83，該連結 部83是在前述直線部82及曲線部84之間以略圓弧的方式連 結。 接下來，針對導溝81之各部位的形狀進行說明。曲線 部84，佔據從導溝8 1的中央到終端爲止的絕大部分，並具 備：當以一定的速度使主門40移動時，導引卡止軸66而使 輔助門60的旋轉角速度形成一定的導引曲線形狀。如此一 來，由於輔助門60的角速度不會形成急速的變化，因此可 防止當卡止軸66通過曲線部84之際，負荷作用於卡止軸66 及支持部65所導致的破損等。 直線部82，是在令輔助門60產生旋轉之前，促使輔助 門6 0形成直線移動並賦予助力的部位。如此一來，譬如相 較於輔助門60突然產生旋轉的場合，可減輕作用於卡止軸 66及支持部65的負荷。連結部83，是使通過直線部82的卡 止軸66平滑地移動至曲線部84的部位。如此一來，可使形 成直線移動並被賦予助力的輔助門6〇平滑地進入旋轉動作 -19- (17) 1310330 。不僅如此，當從正面按壓輔助門6〇時’也能防止輔助門 60移動。 接著，針對曲線部84之形狀的求取方法進行說明。導 溝81是可供輔助門60的卡止軸66通過並加以導引的溝。由 於支持部65的尺寸、形狀等，導溝81並非與遊動端部61之 上部所通過的路徑（軌跡）一致。因此，首先，在主門4 0以 一定的速度（V)移動於一定方向的場合中，算出當輔助門 60以一定的角速度旋轉時之輔助門60的遊動端部61的軌跡 。此外，沿著上述所獲得的軌跡，求取當輔助門60的遊動 端部61產生移動時之卡止軸66的軌跡，並將根據上述方式 所獲得之計算式所表示的軌跡作爲曲線部8 4的形狀即可。 針對輔助門60之遊動端部61軌跡的計算方法進行說明 。如第7圖所示，以遊動端部6 1開始旋轉之曲線區間的起 點P作爲原點。接著，將輔助門60旋轉時，連結端部62從 上述點P起的移動方向作爲X軸，並將通過點p並垂直 於X軸的方向作爲Y軸。此外，以L(mm)作爲主門40之1 次移動所產生的行程長度，以R(mm)作爲輔助門6〇之左右 方向的寬度。接著’以Θ作爲前述X軸與輔助門60所形 成的角度’以V作爲主門40的移動速度，將t作爲經過時 間’並將等速圓周運動1圈所需的時間作爲周期T。根據 上述的參數，針對遊動端部6 1的座標（X、Y)可獲得以下的 計算式。 _ ••計算式（1) • ••計算式（2)I: The rectangular metal plate is bent into a slightly U-shaped rear fixed abutment abutment table 28, 29. The stopper abutting tables 28 and 29 are respectively available for the stoppers 85 and 86 (refer to Figs. 4 and 5) which are provided on the side of the main door 40 to be described later. The configuration of the door unit 20 will be described. As shown in FIGS. 4 and 5, the door unit 20 includes a main door 40 formed of a rectangular sheet metal which is elongated in a front view; and an auxiliary door 60 which is a auxiliary door 60 is rotatably coupled to the connecting end portion 42 of the main door 40 (one end portion facing the side of the right side wall 3b), and is shorter in width than the main door 40, and has a rectangular shape as viewed from the front side. Sheet metal is formed. The main door 40 and the auxiliary door 60 of the above-mentioned pair open and close the opening portion 10 of the front side wall 3a of the protective shutter 3. Hereinafter, the structure of each door will be described. First, the configuration of the main door 40 will be described. As shown in FIG. 4 and FIG. 5, the main door 40 has a window portion 44 having a rectangular elongated hole as viewed from the front side at a slight center, and is provided with a transparent resin plate 90, which is a transparent resin plate. 90 is formed of a reinforced -15-(13) 1310330 plastic plate fixed to a position facing the back side of the window portion 44. In this way, the inside of the protective shutter 3 can be seen through the window portion 44. The main door 40 is provided with a handle 41 for opening and closing the main door 40 at a position slightly lower than the center of the left end portion (one end portion on the side in the closing direction and the one end portion on the side of the left side wall 3c). The main door 40 is provided with a rotary roller unit 50 at its upper portion. The rotary roller unit 50 includes: a roller support piece 51; and a pair of main rollers 52; and a pair of auxiliary rollers 53. The roller support piece 51 is a rectangular support piece that extends from the upper end portion of the main door 40 to the upper side and is horizontally viewed from the front view, and has main rollers 52 at right and left corner portions on the upper front side, respectively, and respectively The left and right corner portions on the lower front side are provided with auxiliary rollers 53 that are separated from the main roller 52 by a specific width. The main roller 52 and the auxiliary roller 53 described above are rotatably fixed to the roller supporting piece 51 by a bolt 95 and a nut 96. The upper side rail 3 5 fixed to the front side wall 3 a of the protective baffle 3 is disposed in the upper and lower gaps between the pair of main rollers 52 and the pair of auxiliary rollers 53 (please refer to FIG. 1 , FIG. 12 ) Reference). Then, the pair of main rollers 52 and the pair of auxiliary rollers 53 described above are slid on the upper and lower raceway surfaces (not shown in the drawing) formed on the upper rail 35. The main door 40 is provided at its lower end portion with a rectangular support piece 55 extending from the lower end portion to the lower side and having a horizontally long viewing direction. The support piece 55 is provided with a rotary roller unit 56 at the left and right corner portions on the lower front side. The rotary roller unit 56 includes a roller support piece 57 having a substantially L-shaped cross section, and a rotary roller 58. The roller support piece 57 extends from the vicinity of the right end portion (or the vicinity of the left end portion) of the lower end portion of the support piece 55 to the lower side, and the front end portion thereof extends horizontally toward the front side of the support piece 55 and is bent at a right angle. The rotary roller 58 - 16 - (14) 1310330 has an axial center in a direction perpendicular to a slightly horizontally extending front end portion of the roller support piece 57, and is rotatably fixed to the front end portion. The roller support piece 57 has a pair of adjustment holes 57a, 57a having a long circular shape in the longitudinal direction of the roller support piece 57 at one end portion fixed to the side of the support piece 55. The bolts 98, 98 are inserted into the pair of adjustment holes 57a, 57a, and are locked to the support piece 55 by the nuts 97, 97 to be fixed. In the above-described fixed structure, the roller supporting piece 57 can be moved in the up and down direction by loosening the nuts 97, 97. In this way, the height of the rotating roller 58 can be adjusted. The rotating roller 58 of the rotary roller unit 56 slides on the surface of the rail piece 36a (please refer to FIG. 11: a single face facing the inner surface of the front side wall 3a) which extends until it is fixed to the protective fence 3 The side wall 3a has a cross section slightly below the T-shaped lower side rail 36. In addition to this, the main door 4 is formed in a state in which the lower end side is locked to the pair of rotating roller units 56. As a result, the lower end side of the main door 40 can be prevented from being shaken by being separated from the inner surface of the front side wall 3a toward the rear. The right end portion of the roller support piece 51 of the rotary roller unit 50 (one end portion on the side of the auxiliary door 60) is bent at a right angle toward the rear to a specific width ', and a rubber block is fixed to the outside of the bent portion. Stop 85. At the right end portion (one end portion on the auxiliary door 60 side) of the support piece 55 provided at the lower end portion of the main door 40, a rubber block-shaped stopper 86 is also fixed. The pair of stoppers 85 and 86 are respectively When the main door 40 is opened, it abuts against the stopper abutting stages 28 and 29 which are respectively fixed to the inner surface of the right side wall 3b (please refer to FIG. 3). The opening width of the main door 40 can be restricted by adjusting the thickness 'of the above stoppers 85, 86'. In this way, the angle of rotation of the auxiliary door 60 can be limited. The limitation of the rotation angle of the auxiliary door 60 -17- (15) 1310330 will be described later. Next, the configuration of the auxiliary door 60 will be described. As shown in FIGS. 4 and 5, the auxiliary door 60' is provided at one end opposite to the connecting end portion 42 of the main door 40, that is, at the connecting end portion 62, which has a longitudinally long strip shape as viewed from the front side. Slice 69 (please refer to Figure 5). The back surface of the connecting piece 69 connected to the rear side of the auxiliary door 60 and the rear end of the connecting end portion 6 2 of the main door 40 are connected by a pair of upper and lower hinges 25 and 25. As such, the end of the auxiliary door 60 on the opposite side of the connecting end portion 62, that is, the side of the swimming end portion 61 can be rotated relative to the main door 40. Since the gap between the connecting end portion 42 of the main door 40 and the connecting end portion 62 of the auxiliary door 60 is closed by the connecting piece 69, leakage of the cutting powder or the cutting fluid from the gap can be prevented from leaking from the gap to the protective baffle 3 Outside. The hinge 25 shown in Figs. 4 and 5 corresponds to "hinge". The auxiliary door 60 is provided with an L-shaped support portion 65 at a corner portion of the upper portion of the swimming end portion 61. The support portion 65 has a first support piece 65a' which extends horizontally from the rear surface near the upper corner portion of the upper end portion of the swimming end portion 61 of the auxiliary door 60 toward the rear of the auxiliary door 60, and the second support piece 65b 'The second support piece 65b extends from the front end of the first support piece 65a to the upper side. The support portion 65 has a rod-shaped locking shaft 66 that extends upward in the upper portion of the second support piece 65b. The locking shaft 66 includes an upper flange portion 67 around the outer diameter direction of the upper side, and a lower flange portion 68 around the outer diameter direction of the lower side. A guide groove 81 of the guide plate 80 is disposed between the upper side flange portion 67 and the lower side flange portion 68 (refer to Fig. 6). In the following description, it is pointed out that the support portion 65 has a function of smoothly shifting the swimming end portion 61 of the auxiliary door 60 to form a rotation. The locking shaft 66 shown in FIGS. 4 and 5 corresponds to the "locking portion". -18- (16) 1310330 The auxiliary door 60 is provided with a handle 63° fixed by a bolt 64a and a nut 64b in the vicinity of the lower right corner portion of the front surface (the surface facing the opening portion 10), and then the guide groove 8 1 The shape is explained. As shown in Fig. 6, the guide groove 81 is a groove provided in the guide plate 80, and has an overall shape of a substantially arc shape with the center side of the protective baffle 3 as the inner side. Specifically, the guide groove 81 has three portions and is composed of a linear portion 82 that is formed on the opening portion 1A (the start end side of the left side wall 3A); And the curved portion 84, the curved portion 84 is formed on the terminal side facing the right side wall 3b and has a parabolic partial shape; and the connecting portion 83 is formed in the straight portion 82 and the curved portion 84. The shape of each portion of the guide groove 81 will be described. The curved portion 84 occupies most of the center from the center of the guide groove 81 to the terminal end, and has a certain When the speed of the main door 40 is moved, the locking shaft 66 is guided to form a certain guiding curve shape of the rotational angular velocity of the auxiliary door 60. Thus, since the angular velocity of the auxiliary door 60 does not rapidly change, When the locking shaft 66 passes the curved portion 84, the load acts on the locking shaft 66 and the support portion 65, and the like. The straight portion 82 causes the auxiliary door 60 to be formed before the auxiliary door 60 is rotated. a department that moves straight and gives power In this case, for example, when the auxiliary door 60 suddenly rotates, the load acting on the locking shaft 66 and the support portion 65 can be reduced. The connecting portion 83 is such that the locking shaft 66 passing through the straight portion 82 is smoothly Moving to the portion of the curved portion 84. In this way, the auxiliary door 6 that is linearly moved and assisted can be smoothly entered into the rotating motion -19-(17) 1310330. Moreover, when the auxiliary door 6 is pressed from the front side At the same time, the movement of the auxiliary door 60 can be prevented. Next, a method of obtaining the shape of the curved portion 84 will be described. The guide groove 81 is a groove through which the locking shaft 66 of the auxiliary door 60 can pass and guide. The size, shape, and the like of 65, the guide groove 81 does not coincide with the path (track) through which the upper portion of the swimming end portion 61 passes. Therefore, first, when the main door 40 moves at a constant speed (V) in a certain direction, The trajectory of the swimming end portion 61 of the auxiliary door 60 when the auxiliary door 60 is rotated at a constant angular velocity is calculated. Further, along the above-obtained trajectory, the card when the swimming end portion 61 of the auxiliary door 60 is moved is calculated. Track of the axle 66 The trajectory represented by the calculation formula obtained in the above manner may be taken as the shape of the curved portion 84. The calculation method of the trajectory of the swimming end portion 61 of the auxiliary door 60 will be described. As shown in Fig. 7, the swimming end is used. The starting point P of the curve section in which the portion 61 starts to rotate is used as the origin. Next, when the auxiliary door 60 is rotated, the moving direction of the connecting end portion 62 from the above point P is taken as the X axis, and the passing point p is perpendicular to the X axis. The direction is taken as the Y-axis. Further, L (mm) is used as the stroke length of the primary movement of the main door 40, and R (mm) is used as the width of the auxiliary door 6 左右 in the left-right direction. The angle formed by the shaft and the auxiliary door 60 is taken as the period T with V as the moving speed of the main door 40, t as the elapsed time 'and the time required to move the constant-speed circular one turn. According to the above parameters, the following calculation formula can be obtained for the coordinates (X, Y) of the swimming end portion 61. _ •• Calculation formula (1) • •• Calculation formula (2)
Vt + RcosG — R= Vt + R(cos0 — 1) Y - RsinG -20- (18) 1310330 接下來’由於θ = Trt/ 2T，當將其代入計算式（1)(2)時 形成= X = Vt + R(cos(7it/2T) — 1) • ·.計算式（3 ) Y = Rsin(jct/ 2T) • ••計算式（4) 接著計算式（4)形成： πί/ 2Τ = sin' 1 (Y / R) ♦ ••計算式（5 ) 並且計算式（5 )形成： .-一 ^ 、 . _ 1 . _. t= (2Τ/ 7t)sin— ](Y/ R) . ·.計算式（6) 因此，倘若將該計算式（6 )代入計算式（3 )，將形成： Χ = ν(2ί/π)8Ϊη·1(Υ/Κ) + Κ(ς〇8(8Ϊη'1(Υ/Κ))-1)· •計算式（7) 因此，倘若進一步整理進算式（7)時，將形成： XspTV/TOsiir'Y/RhRi/^l^Y/R)2)」）· · ·計算式（8) 不僅如此，由於 TV= L · ·.計算式（9) 倘若將計算式（9)代入計算式（8)時，相形成： Χ = (2Ι/π)8ίη1(Υ/Κ) + Κ(^ (1-(Y/R)2).i) . . •計算式（10) 該計算式（10)則成爲表示輔助門60之遊動端部61軌跡 的計算式。 -21 - (19) 1310330 接著’針對輔助門60之卡止軸66軌跡的計算方法進行 說明。卡止軸66的軌跡，是根據主門40的行程長度L、輔 助門60的寬度R、支持部65之第1支持片65a的長度等而變 化。因此，在本實施形態中如第7圖所示，使L = 680mm、 R = 2 8 1 mm ’並描繪當輔助門60的遊動端部61通過根據計算 式（1〇)所獲得的軌跡時之卡止軸66的軌跡，並藉由最小平 方法（least square)的一般近似値分析程式求得上述所描繪 的集合（set)。以下，列舉根據近似値分析程式所求得的計 算式來作爲一個範例。 y=-0.0007324x2+1.438x-10.94 ...計算式（11) 沿著該計算式（1 1)所獲得的軌跡形成曲線部84即可。 根據以上的方法算出曲線部84的形狀。因此，當使卡 止軸66沿著上述曲線部S4滑動時，輔助門60的遊動端部61 將沿著計算式（10)所算出的軌跡旋轉。如此一來，當主門 4〇以一定速度移動時，輔助門60能夠以一定的角速度產生 旋轉並緩緩地摺疊。 以卡止軸66通過A點起到B點爲止的特定距離（譬如 140mm)，作爲輔助門60移動的直線區間。以卡止軸66通 過B點起到輔助門60之旋轉角度形成90度時卡止軸66所處 的位置C點爲止’作爲輔助門60旋轉的旋轉區間。在該場 合中，B點成爲直線區間的卡止軸66軌跡、與曲線區間的 卡止軸66軌跡之間的反曲點（inflection point)。假設，倘 若卡止軸66直接通過該反曲點B時，輔助門60的動作將形 成從直線移動動作突然切換成旋轉動作。在該場合中，由 -22- (20) 1310330 於負荷作用於卡止軸66及支持部65，而恐有導致卡止軸66 及支持部65破損之虞。因此，如第6圖所示，藉由在反曲 點B設置以平滑的圓弧來連接連結部83的方式，可使卡止 軸66從第7圖所示的直線區間平滑地移動至曲線區間。藉 此，可減輕作用於卡止軸66及支持部65的負荷。根據以上 的説明，藉由以直線部82、連結部83、曲線部84構成導溝 81的方式，可使輔助門60隨著主門40的移動而形成從動， 並形成平滑的旋轉。 接下來，針對由前述構造所形成之門單元20的開閉動 作，參考第8圖〜第15圖進行說明。首先，如第8圖所示， 在利用門單元20關閉開口部10的狀態下’主門40與輔助門 60是位於同一平面上（請參考第13圖）。如此一來，主門40 與輔助門60所形成的面將完全封閉開口部1〇。輔助門60的 卡止軸66如第13圖所示，是位於導板80的導溝81之直線部 82的起始端（請參考第6圖所示之A點的位置）。 接著，倘若握持主門40的把手41拉向右側時’第1 1圖 所示之主門4 0的旋轉滾子單元5 0將於上側導軌3 5上形成滑 動，而旋轉滾子單元56、56將於下側導軌36的軌道片36a 上形成滑動。藉此，由於主門40沿著開口部1 〇移動’因此 如第9圖所示，開口部10將緩緩地開啓。輔助門60將透過 鉸鏈25而被主門40推向右側壁3b側。一旦如此’由於輔 助門60的卡止軸66通過第6圖所示之導溝81的直線部82， 因此輔助門60與主門40—起形成移動。 不僅如此，當卡止軸6 6通過導溝8 1的直線部8 2 ’並開 -23- (21) 1310330 始通過圓弧狀的連結部83時’輔助門60之遊動端部61的上 部，將透過支持部65而被牽引至保護擋板3的内側而形成 偏移。如此一來，輔助門6〇可從直線移動的動作平滑地轉 移成旋轉動作。不僅如此’如第14圖所示’當卡止軸66通 過導溝8 1之連結部8 3的過程結束而通過曲線部8 4時，輔助 門60可直接以一定的角速度持續旋轉。如此一來’由於輔 助門60的角速度爲一定，因此輔助門60的移動不會突然地 變化，且負荷不會作用於卡止軸66及支持部65。不僅如此 t ，由於從連結部83到曲線部84之間平緩地形成彎曲，因此 即使在作業者用力拉動主門4〇的場合中，把手也不會變 的沉重，並能以一定的力量移動。如此一來’可減輕作業 者操作門單元20時所作用的負担。 隨著卡止軸66移動至導溝81之曲線部84的終端側，主 門40與輔助門60所形成的角度也緩緩地變小。當卡止軸66 接近導溝81的終端時，固定於主門40之連結端部42的擋塊 g 85、86，將抵接在固定於保護擋板3之右側壁3b的擋塊抵 接台28、29。一旦如此，輔助門60的旋轉將停止，且主門 40的移動也將停止。此時主門40與輔助門60所形成的角度 ，是限制爲不會形成90度以下的程度。 在此，針對限制主門40與輔助門60所形成之角度的理 由形說明。如同前述的説明，擋塊85、86與擋塊抵接台28 、29可調整主門40與輔助門60所形成的角度。在省略上述 構件的場合中，主門40將更進一步地把輔助門60推向右側 壁3b側。一旦如此，主門40與輔助門60所形成的角度將 -24- (22) 1310330 更進一步縮小，並產生卡止軸66從導溝81的終端略爲返回 至起始端側的現象。在該場合中，譬如當作業者用力拉動 主門40時，由於位在導溝81之終端的卡止軸66突然朝反方 向後退，而容易成爲負荷作用於卡止軸66與支持部65而導 致破損等的原因。在本實施形態中，由於擋塊85、86與擋 塊抵接台28、29限制輔助門60的旋轉角度，因此主門40與 輔助門60所構成的角度不會形成90度以下，可防止卡止軸 66之後退現象的產生。 如此一來，如第10圖、第12圖、第15圖所示，當開口 部1 〇完全開啓時，保護擋板3的内側將顯現。接著，在關 閉經開啓後之開口部1 0的場合中，藉由握持主門4 0的把手 41而朝左側拉動的方式，使主門40移動至左側，並使輔助 門60—邊以一定的角速度旋轉一邊恢復至與主門40相同的 平面上，進而使主門40與輔助門60所形成的門單元20完全 封閉開口部1〇(請參考第8圖、第11圖、第13圖）。 如以上的説明所述，本實施形態的加工中心1，在保 護擋板3之前側壁3a的開口部10具備門單元20。該門單元 2 0是由：直線移動的主門40;及可旋轉地連結於該主門40 ，且能從動於主門40而一邊旋轉一邊彎折的輔助門60所形 成。輔助門60在遊動端部61的上部隔著支持部65具備卡止 軸66，該卡止軸66是沿著設在保護擋板3的上面之導板80 的導溝81滑動。如此一來，可使輔助門60形成平滑的旋轉 動作。而本實施形態的導溝8 1是由：直線狀的直線部8 2 ; 和圓弧狀的連結部83;及具備拋物線之局部形狀的曲線部Vt + RcosG — R= Vt + R(cos0 — 1) Y - RsinG -20- (18) 1310330 Next 'Because θ = Trt/ 2T, when it is substituted into the formula (1)(2), it forms = X = Vt + R(cos(7it/2T) — 1) • ·. Calculation formula (3) Y = Rsin(jct/ 2T) • •• Calculation formula (4) Then calculate equation (4): πί/ 2Τ = Sin' 1 (Y / R) ♦ •• Calculate the formula (5) and calculate the formula (5) to form: .-一^, . _ 1 . _. t= (2Τ/ 7t)sin— ](Y/ R) Equation (6) Therefore, if the formula (6) is substituted into the formula (3), it will form: Χ = ν(2ί/π)8Ϊη·1(Υ/Κ) + Κ(ς〇8 (8Ϊη'1(Υ/Κ))-1)· • Calculate the formula (7) Therefore, if we further formulate the equation (7), it will form: XspTV/TOsiir'Y/RhRi/^l^Y/R) 2)")· · · Calculation formula (8) Not only that, since TV = L · ·. Equation (9) If the formula (9) is substituted into the formula (8), the phase is formed: Χ = (2Ι/ π)8ίη1(Υ/Κ) + Κ(^ (1-(Y/R)2).i) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The calculation formula of the trajectory. -21 - (19) 1310330 Next, the calculation method of the trajectory of the locking shaft 66 of the auxiliary door 60 will be described. The trajectory of the locking shaft 66 is changed in accordance with the stroke length L of the main door 40, the width R of the auxiliary door 60, the length of the first support piece 65a of the support portion 65, and the like. Therefore, in the present embodiment, as shown in Fig. 7, L = 680 mm and R = 2 8 1 mm ', and when the trailing end portion 61 of the auxiliary door 60 passes the trajectory obtained according to the calculation formula (1 〇), The trajectory of the axis 66 is locked and the above-described depicted set is obtained by a general approximation analysis program of the least square method. Hereinafter, a calculation formula obtained by an approximate 値 analysis program will be cited as an example. y=-0.0007324x2+1.438x-10.94 Equation (11) The curve portion 84 may be formed along the trajectory obtained by the calculation formula (1 1). The shape of the curved portion 84 is calculated by the above method. Therefore, when the locking shaft 66 is slid along the curved portion S4, the swimming end portion 61 of the auxiliary door 60 is rotated along the trajectory calculated by the calculation formula (10). As a result, when the main door 4 is moved at a constant speed, the auxiliary door 60 can be rotated at a certain angular velocity and slowly folded. A specific distance (for example, 140 mm) from the point A to the point B is obtained by the locking shaft 66 as a straight section in which the auxiliary door 60 moves. The locking portion 66 is rotated by the point C from the point B to the position C at which the locking shaft 66 is located when the rotation angle of the auxiliary door 60 is 90 degrees. In this case, point B becomes an inflection point between the locus of the locking axis 66 of the straight section and the locus of the locking axis 66 of the curved section. It is assumed that if the locking shaft 66 passes directly through the inflection point B, the action of the auxiliary door 60 will be abruptly switched from a linear moving motion to a rotating motion. In this case, -22-(20) 1310330 acts on the locking shaft 66 and the support portion 65 under load, and the locking shaft 66 and the support portion 65 may be damaged. Therefore, as shown in Fig. 6, the locking shaft 66 can be smoothly moved from the straight section shown in Fig. 7 to the curved line by connecting the connecting portion 83 with a smooth circular arc at the inflection point B. Interval. Thereby, the load acting on the locking shaft 66 and the support portion 65 can be reduced. According to the above description, the guide groove 60 can be formed in accordance with the movement of the main door 40 by the straight portion 82, the connecting portion 83, and the curved portion 84, thereby forming a smooth rotation. Next, the opening and closing operation of the door unit 20 formed by the above-described configuration will be described with reference to Figs. 8 to 15 . First, as shown in Fig. 8, in the state in which the opening portion 10 is closed by the door unit 20, the main door 40 and the auxiliary door 60 are located on the same plane (refer to Fig. 13). As a result, the face formed by the main door 40 and the auxiliary door 60 will completely close the opening 1〇. As shown in Fig. 13, the locking shaft 66 of the auxiliary door 60 is located at the beginning of the straight portion 82 of the guide groove 81 of the guide 80 (refer to the position of point A shown in Fig. 6). Then, if the handle 41 of the main door 40 is pulled to the right side, the rotating roller unit 50 of the main door 40 shown in FIG. 1 will slide on the upper rail 35, and the rotating roller unit 56, 56 will slide on the rail piece 36a of the lower side rail 36. Thereby, since the main door 40 moves along the opening portion 1', the opening portion 10 will be slowly opened as shown in Fig. 9. The auxiliary door 60 will be pushed by the main door 40 to the right side wall 3b side through the hinge 25. Once this is the case, since the locking shaft 66 of the auxiliary door 60 passes through the straight portion 82 of the guide groove 81 shown in Fig. 6, the auxiliary door 60 moves together with the main door 40. In addition, when the locking shaft 66 passes through the straight portion 8 2 ' of the guide groove 8 1 and opens the -23-(21) 1310330 through the arc-shaped connecting portion 83, the upper portion of the swimming end portion 61 of the auxiliary door 60 The inner side of the protective baffle 3 is pulled through the support portion 65 to form an offset. In this way, the auxiliary door 6〇 can smoothly shift from the linear movement to the rotation. Not only that, as shown in Fig. 14, when the locking shaft 66 passes through the connecting portion 83 of the guide groove 8 1 and passes through the curved portion 84, the auxiliary door 60 can continuously rotate at a constant angular velocity. As a result, since the angular velocity of the auxiliary door 60 is constant, the movement of the auxiliary door 60 does not suddenly change, and the load does not act on the locking shaft 66 and the support portion 65. In addition, since the curve is smoothly formed between the connecting portion 83 and the curved portion 84, even when the operator pulls the main door 4〇 hard, the handle does not become heavy and can move with a certain force. . In this way, the burden on the operator when operating the door unit 20 can be reduced. As the locking shaft 66 moves to the terminal side of the curved portion 84 of the guide groove 81, the angle formed by the main door 40 and the auxiliary door 60 is also gradually reduced. When the locking shaft 66 approaches the terminal end of the guide groove 81, the stoppers g 85 and 86 fixed to the connecting end portion 42 of the main door 40 abut against the stopper fixed to the right side wall 3b of the protective shutter 3 Table 28, 29. Once this is done, the rotation of the auxiliary door 60 will stop and the movement of the main door 40 will also stop. At this time, the angle formed by the main door 40 and the auxiliary door 60 is limited to such an extent that it does not form 90 degrees or less. Here, the rationale for limiting the angle formed by the main door 40 and the auxiliary door 60 will be described. As previously explained, the stops 85, 86 and the stop abutments 28, 29 can adjust the angle formed by the main door 40 and the auxiliary door 60. In the case where the above member is omitted, the main door 40 will further push the auxiliary door 60 toward the right side wall 3b side. Once this, the angle formed by the main door 40 and the auxiliary door 60 is further reduced by -24-(22) 1310330, and a phenomenon occurs in which the locking shaft 66 slightly returns from the terminal end of the guide groove 81 to the starting end side. In this case, for example, when the operator pulls the main door 40 with force, the locking shaft 66 at the end of the guide groove 81 suddenly retreats in the reverse direction, and the load acts on the locking shaft 66 and the support portion 65. Causes damage, etc. In the present embodiment, since the stoppers 85 and 86 and the stopper abutting tables 28 and 29 restrict the rotation angle of the auxiliary door 60, the angle formed by the main door 40 and the auxiliary door 60 does not become 90 degrees or less, and can be prevented. The locking shaft 66 is retracted. As a result, as shown in Fig. 10, Fig. 12, and Fig. 15, when the opening portion 1 is fully opened, the inside of the protective shutter 3 will appear. Next, when the opened opening 10 is closed, the main door 40 is moved to the left side by the handle 41 of the main door 40, and the auxiliary door 60 is fixed to the left side. The angular velocity is restored to the same plane as the main door 40, and the door unit 20 formed by the main door 40 and the auxiliary door 60 is completely closed to the opening 1 (refer to Fig. 8, Fig. 11, Fig. 13). ). As described above, in the machining center 1 of the present embodiment, the door unit 20 is provided in the opening portion 10 of the side wall 3a before the protective baffle 3. The door unit 20 is formed by a main door 40 that moves linearly, and an auxiliary door 60 that is rotatably coupled to the main door 40 and that can be bent while being rotated by the main door 40. The auxiliary door 60 has a locking shaft 66 that is slid along the guide groove 81 of the guide plate 80 provided on the upper surface of the protective baffle 3 via the support portion 65 at the upper portion of the swimming end portion 61. In this way, the auxiliary door 60 can be made to form a smooth rotating motion. The guide groove 8 1 of the present embodiment is composed of a linear straight portion 8 2 and an arc-shaped connecting portion 83; and a curved portion having a partial shape of a parabola
S 25· (23) 1310330 8 4所形成。 • 曲線部84具備導引卡止軸66的曲線形狀，該曲線形狀 - 在以一定的速度使主門4開啓時，可使輔助門60的旋轉角 速度形成一定。如此一來，由於輔助門6〇的角速度不會急 速地變化，故當卡止軸66通過曲線部84之際，可防止負荷 作用於卡止軸66與支持部6S所導致的破損。 直線部82，是在令輔助門60產生旋轉之前，促使輔助 門60形成直線移動並賦予助力的部位。如此一來，譬如相 B 較於輔助門60突然產生旋轉的場合，可減輕作用於卡止軸 66及支持部65的負荷。此外，連結部83，是使通過直線部 82的卡止軸66平滑地移動至曲線部84的部位。如此一來， 可使形成直線移動並被賦予助力的輔助門6 0平滑地進入旋 轉動作。 ' 本發明的工作機械並不侷限於前述的實施形態，可以 有各種的變形例。舉例來說，在前述的實施形態中，雖然 門單元20是構成將主門40配置在從正面觀看時的左側，並 0 將輔助門60配置在右側’但亦可構成將主門40配置於右側 ，將輔助門60配置於左側。在該場合中，將主門4〇拉動至 左方向而使其移動，而形成輔助門60摺疊於左側壁3c側 〇 在前述的實施形態中，雖然使主門40形成移動的構造 是由：旋轉滾子單元50、56 ;和上側導軌35 ;及下側導軌 36所構成，但亦可採用上述以外的構造，來形成在軌道上 滑動的構造。 -26- (24) 1310330 雖然在前述的實施形態中是形成：設於主門40側的擋 ' 塊8 5 ' 8 6，抵接於設在保護擋板3之右側壁3b内面的擋塊 抵接台28、29的構造，但亦可形成擋塊85、86直接抵接於 右側壁3b内面的構造。此外，擋塊85、86亦可設於右側 壁3b的内面。 雖然在前述的實施形態中，支持部65是由第1支持片 65a與第2支持片65b所構成，但亦可僅由第1支持片65a 構成，並在該第1支持片65a的前端部設置卡止軸66。 【圖式簡單說明】 第1圖：爲加工中心1的整體立體圖 第2圖：爲保護擋板3的立體圖。 Λ 第3圖：是從上側後方觀看保護擋板3之前面的立體圖 (中間分隔板3 0省略）。 第4圖：從前面側觀看門單元20的立體圖。 | 第5圖：爲門單元2 0的後視圖。 第6圖：爲導板80的俯視圖。 第7圖：爲顯示輔助門60之旋轉軌跡的説明圖。 第8圖：爲保護擋板3的前視圖（開口部1 〇 :關閉狀態） 〇 第9圖：爲保護擋板3的前視圖（開口部1 〇 :半開啓狀 態）。 第1〇圖：爲保護擋板3的前視圖（開口部10 :全開狀態 -27- (25) 1310330 第11圖：爲第3圖所不之A— A線箭頭方向的剖面圖（ 開口部1 〇 :關閉狀態）。 第12圖：爲第3圖所不之A— A線箭頭方向的剖面圖（ 開口部1 〇 :全開狀態）。 第13圖：爲第8圖所不之B— B線箭頭方向的剖面圖 〇 第14圖：爲第9圖所7K之C— C線箭頭方向的剖面圖 〇 第15圖：爲第10圖所示之D-D線箭頭方向的剖面圖 【主要元件符號說明】 3 :保護擋板 3 a :前側壁 3b :右側壁 3 c :左側壁 3 e :後側壁 1 〇 :開口部 1 1 :開口部 1 3 :操作箱 1 4 :開口部 1 5 :檢查艙口 20 :門單元 3 〇 :分隔板 -28- (26) 1310330 :開口部 : :主門 :把手 :窗部 :輔助門 :卡止軸 :凸緣部 :導板 :導溝 :樹脂板 -29S 25· (23) 1310330 8 4 formed. The curved portion 84 is provided with a curved shape that guides the locking shaft 66. When the main door 4 is opened at a constant speed, the rotational angular velocity of the auxiliary door 60 can be made constant. As a result, since the angular velocity of the auxiliary door 6〇 does not change rapidly, when the locking shaft 66 passes through the curved portion 84, the load can be prevented from being damaged by the locking shaft 66 and the support portion 6S. The linear portion 82 is a portion that urges the auxiliary door 60 to linearly move and assists the auxiliary door 60 before it is rotated. In this way, if the phase B suddenly rotates compared to the auxiliary door 60, the load acting on the locking shaft 66 and the support portion 65 can be reduced. Further, the connecting portion 83 is a portion that smoothly moves the locking shaft 66 passing through the straight portion 82 to the curved portion 84. In this way, the auxiliary door 60 that is linearly moved and assisted can be smoothly entered into the rotating motion. The working machine of the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above-described embodiment, the door unit 20 is configured such that the main door 40 is disposed on the left side when viewed from the front, and the auxiliary door 60 is disposed on the right side, but the main door 40 may be disposed. On the right side, the auxiliary door 60 is disposed on the left side. In this case, the main door 4 is pulled to the left direction and moved, and the auxiliary door 60 is folded to the left side wall 3c side. In the above-described embodiment, the main door 40 is configured to move by: The rotating roller units 50 and 56 are formed of the upper rail 35 and the lower rail 36. However, a structure other than the above may be employed to form a structure that slides on the rail. -26- (24) 1310330 In the above embodiment, the stoppers 8 5 ' 8 6 provided on the side of the main door 40 abut against the stoppers provided on the inner surface of the right side wall 3b of the protective shutter 3 The structure of the abutting stages 28 and 29 is abutted, but the structure in which the stoppers 85 and 86 directly abut against the inner surface of the right side wall 3b can also be formed. Further, the stoppers 85, 86 may be provided on the inner surface of the right side wall 3b. In the above embodiment, the support portion 65 is constituted by the first support piece 65a and the second support piece 65b, but may be constituted only by the first support piece 65a and at the front end portion of the first support piece 65a. The locking shaft 66 is provided. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall perspective view of a machining center 1 Fig. 2 is a perspective view of a protective shutter 3. Λ Fig. 3 is a perspective view of the front surface of the protective baffle 3 viewed from the upper rear side (the intermediate partition plate 3 0 is omitted). Fig. 4 is a perspective view of the door unit 20 viewed from the front side. | Figure 5: Rear view of the door unit 20. Fig. 6 is a plan view of the guide plate 80. Fig. 7 is an explanatory view showing the rotation locus of the auxiliary door 60. Fig. 8 is a front view of the protective shutter 3 (opening 1 〇 : closed state) 〇 Fig. 9 is a front view of the protective shutter 3 (opening 1 〇 : half open state). Fig. 1 is a front view of the protective baffle 3 (opening 10: fully open state -27-(25) 1310330 Fig. 11: a cross-sectional view of the direction of the arrow A-A in the third figure (opening) 1 〇: Off state. Fig. 12: A cross-sectional view of the direction of the arrow A-A in the third figure (opening 1 〇: fully open state). Fig. 13: B for the 8th figure - Cross-sectional view of the arrow direction of the B line 〇 Fig. 14 is a cross-sectional view of the direction of the arrow of the C-C line of 7K in Fig. 9 〇 Fig. 15: a cross-sectional view of the direction of the arrow of the DD line shown in Fig. 10 [main components DESCRIPTION OF SYMBOLS 3: Protective baffle 3 a : Front side wall 3b : Right side wall 3 c : Left side wall 3 e : Rear side wall 1 〇: Opening part 1 1 : Opening part 1 3 : Operation box 1 4 : Opening part 1 5 : Check hatch 20: Door unit 3 〇: partition plate -28- (26) 1310330: opening: main door: handle: window: auxiliary door: locking shaft: flange: guide: guide groove: Resin plate-29