1295214 (1) 九、發明說明 【發明所屬之技術領域】 本發明係關於門裝置及具備該門裝置之工 細而言，係關於藉由使複數扇門移動來進行壁 開閉的門裝置及具備該門裝置之工作機械。 【先前技術】 _ 以往，工作機械之機具中心（machining 具備：用來加工工件（work ;被加工物）的機 成爲該機械本體的基座之鐵製的機床（bed) ，安裝有用來覆蓋機械本體的周圍予以保護之 (splash cover )。此防濺蓋係從外部保護機 且使由機械本體所飛散之切削屑不會飛散到外 者。在此防濺蓋的前面，設有正面視角呈長方 ，在該開口部設有：藉由使至少2扇門平行移 • 開口部予以開閉之門裝置。藉此，作業者利用 門相互平行地滑動，使得開口部開放，經由該 將工件設置於機械本體的平台上。 在這種的門裝置，被提案有例如，將細縫 該細縫係將沿著一條（a line of)的導軌的延 下游之門的導引滾子定位於相鄰而位於其上游 導引滾子上游，使得複數個各門獨立，而可沿 軌之一側面平行移動地支承的門裝置（參照例 第3 26 1 74 1號公報）。在此門裝置，由於在導 作機械，詳 的開口部之 center)係 械本體；及 。在機床上 箱型防濺蓋 械本體，並 部造成污染 形之開口部 動，來將此 使這些開閉 開口部，可 形成於門， 伸方向位於 之其他門的 著一條的導 如曰本特許 軌的前述一 (2) 1295214 側面相反側的另一側面不需要用配設門之空間，故能夠謀 求門裝置之小型化。 但’在日本特許第3261741號公報所記載之門裝置， 設置有用來分別使各門的下端部滑嵌（在具有裕度的狀態 下嵌入）用之防晃動用之軌道，在門被關閉之狀態下，該 軌道的一部分在外殼（防濺蓋）內露出。因此，當大量的 切削屑由機械本體飛散時，會有切削屑堆積到該軌道上之 # 問題點產生。且，當在此狀態下，進行門的開閉時，會有 門的下端部搭載到堆積於軌道上的切削屑上，門變得無法 圓滑地移動，造成門的開閉變得困難之問題點產生。 【發明內容】 本發明係爲了解決上述課題而開發完成之發明，其目 的在於提供當藉由複數個門將開口部關閉時，異物不會堆 積到軌道上之門裝置及具備該門裝置之工作機械。 # 爲了達到上述目的，請求項1之門裝置，係具備設置 於包圍機械本體的壁之開口部、及開閉該開口部之由至少 2扇所構成的複數個門之門裝置，其特徵爲：具備：第1 導引機構，其係在與前述開口部的下端部大致相同的長度 之範圍內，將前述複數個門中之前述壁側的門之下端部沿 著前述開口部之下端部導引者；及第2導引機構’其係將 與前述壁側的門不同之其他的門之下端部沿著前述壁側的 門之下端部的長度方向導引者。 又，請求項2之門裝置，係加上請求項1所記載的發 -5- (3) 1295214 明之結構，其中前述第1導引機構係由：沿著前述開口部 的下端部所設置，具有與前述開口部的下端部大致相同的 長度之第1軌道；與設置於前述壁側的門之下端部附近， 滑動於前述第1軌道之第1滑動部所構成，前述第2導引 機構係由：設置於支承前述第1滑動部的支承構件之第2 軌道；與滑動於該第2軌道，設置於前述其他門的下端部 附近之第2滑動部所構成。 • 又，請求項3之門裝置，係加上請求項2所記載的發 明之結構，其中具備各自沿著前述複數個門的下端部所設 置，用來覆蓋前述第1軌道的一部分予以保護之保護片， 當前述開口部受到前述複數個門所關閉時，前述第1軌道 的所有部分藉由複數個前述保護片加以隱藏。 又，請求項4之門裝置，係加上請求項2或3所記載 的發明之結構，其中前述第1滑動部及第2滑動部係爲滾 子，前述第1軌道及前述第2軌道係供前述滾子滾動之軌 _道。 又，請求項5之門裝置，係加上請求項2至4中任一 項所記載的發明之結構，其中前述複數個門係以前述壁側 的門之第1門與前述其他門之第2門所構成，前述第1滑 動部係爲設置於前述第1門的下端部附近，滾動於前述第 1軌道之第1滾子，前述第2滑動部係爲設置於前述第2 門的下端部附近，滾動於前述第2軌道之第2滾子’具備 有連動於前述第2門的開閉移動，以使前述第1門開閉移 動之連動機構。 -6 - (4) 1295214 又，請求項6之門裝置，係加上請求項5所記載的發 明之結構，其中前述連動機構係由設置於前述第2門的卡 合片、與分別卡止於前述第1門的移動方向之兩端部，卡 止於前述卡合片的一對被卡合片所構成，前述卡合片係配 置於前述一對被卡合片之間，在前述第2門移動之情況， 藉由前述一對被卡合片中之至少任一被卡合片卡合到前述 卡合片，使得前述第1門連動於前述第2門的移動而移動 〇 又，請求項7之門裝置，係加上請求項2至6中任一 項所記載的發明之結構，其中具備：沿著前述壁的裏面側 也就是前述開口部的下端部大致呈水平地突設’用以支承 前述第1軌道之第1支承片；及由前述第1門的下端部朝 前述壁側，大致呈水平地突設，並且朝與前述第1門封閉 的方向呈水平地延伸出來，用以支承前述第2軌道之第2 支承片。 又，請求項8之門裝置，係加上請求項7所記載的發 明之結構，其中前述第1軌道係由前述第1支承片的下面 朝大致呈垂直方向突設，而前述第2軌道係由前述第2支 承片的下面，朝大致呈垂直方向突設。 又，請求項9之門裝置，係加上請求項8所記載的發 明之結構，其中具備由前述第2門的前面之下端部朝前述 壁側大致呈水平地突設之第3支承片’前述第1滾子係軸 支於前述第2支承片的上面，並且滾動於前述第1軌道的 側面上，前述第2滾子係軸支於前述第3支承片的上面’ (5) 1295214 並且滾動於前述第2軌道的側面上。 又，請求項1 〇之門裝置，係加上請求項9所記載的 發明之結構，其中前述保護片係由第1保護片、及第2保 護片所構成的，該第1保護片爲架設於前述第1門的下端 部、與前述第2支承片之由前述壁的裏面分離的方向的一 端部之間，覆蓋前述第1軌道的長方向之一部分者’而該 第2保護片爲架設於前述第2門的下端部、與前述第3支 •承片之由前述壁的裏面分離的方向之一端部之間’用以覆 蓋受到前述第1保護片所覆蓋的前述一部分以外之部分者 〇 又，請求項1 1之門裝置，係加上請求項9或1 〇所記 載的發明之結構，其中前述第1滾子或第2滾子係設有複 數個，並且分別沿著前述第2支承片或前述第3支承片排 列設置，彼此相鄰的前述第1滾子或第2滾子係將前述第 1軌道或前述第2軌道夾持於中央而配設於相反側。 ® 又，請求項12之工作機械，係具備：加工工件之機 械本體、及圍繞該機械本體的加工區域之覆蓋件’且具備 設置於該覆蓋件的開口部、及開閉該開口部之至少由2扇 所構成之複數個門的工作機械，其特徵爲：具備請求項1 至1 1中所記載任一門裝置。 【實施方式】 以下，說明關於本發明的一實施形態之門裝置2〇 ° 圖1係使用於機具中心之防濺蓋2的全體斜視圖。圖2係 (6) 1295214 防濺蓋2的右側面圖。圖3係由圖2所示的A-A線箭號 視角所觀看之前壁部3的裏面圖（開口部4呈封閉狀態） 。圖4係由圖2所示的A-A線箭號視角所觀看之前壁部3 的裏面圖（開口部4呈半封閉狀態）。圖5係由圖2所示 的A-A線箭號視角所觀看之前壁部3的裏面圖（開口部4 呈開放狀態）。圖6係圖3所示的第3前壁部3 c附近之 部分放大圖。圖7係由左門5的前方所觀看之斜視圖。圖 • 8係由右門6的前方所觀看之斜視圖。圖9係本體軌道支 承部3 0之斜視圖。圖1 〇係滾子支承部4 0之斜視圖。圖 1 1係滾子支承部5 0之斜視圖。圖1 2係連結於左門5的 下端部之保護片8 0附近的斜視圖。圖1 3係連結於右門6 的下端部之保護片8 5附近的斜視圖。圖1 4係圖5所示的 B-B線箭號方向之斷面圖。圖1 5係顯示由圖2所示的A-A線箭號方向所觀看的左門5及右門6的移動狀態之動作 說明圖（開口部4呈開放狀態）。圖1 6係顯示由圖2所 ® 不的A-A線箭號方向所觀看的左門5及右門6的移動狀 態之動作說明圖（開口部4呈半開放狀態）。圖1 7係顯 示由圖2所示的A-A線箭號方向所觀看的左門5及右門6 的移動狀態之動作說明圖（開口部4呈封閉狀態）。 又，在圖3至圖5、圖15至圖17，爲了圖示前壁部 3的裏面側，爲了說明之方便，而將圖中右側作爲「前壁 部3的左側」，而將圖中左側作爲「前壁部3的右側」來 進行說明。機具中心1的X軸方向係指機具中心丨的左 右方向，Y軸方向係指機具中心1的深度方向（前後方向 -9 - (7) 1295214 )，Z軸方向係指機具中心1的上下方向。 本實施形態之門裝置20係設置於工作機械也就是機 具中心的防濺蓋2之開口部4，具體而言，爲具備將開口 部4套伸地開閉之左門5及右門6的裝置。 說明關於防濺蓋2之槪略構造。如圖1所示的防濺蓋 2係固定於未圖示之成爲機具中心的基座之機床上，圍繞 保護進行工件的切削加工之機械本體者。在防濺蓋2之內 φ 側，設有機械本體的加工區域，由該加工區域所排出的切 削屑或冷卻劑（coolant)等的飛沬係能夠藉由與防濺蓋2 的內壁衝突而落下，防止外部污染。 如圖1所示，防濺蓋2係形成大致呈長方體形狀的箱 型。又，該防濺蓋2的頂面及底面開口，在前面設有前壁 部3。在此前壁部3，設有用來將工件取出置入之正面視 角大致呈長方形的開口部4 (參照圖4、圖5 )，並且設 有用來開閉該開口部4之本發明的特徵之門裝置2 0。此 • 門裝置20係具備：例如大致形成縱長之長方形，可伸縮 (Telescopic)地滑動之鐵板製的2扇門。在防涵蓋2之 底面側，設有固定於機床之機床安裝部8。 如圖1、圖3所示，這2扇門係以用來封閉開口部4 的左半部分（由正面觀看前壁部3時的左半部分）之左門 5、及用來封閉開口部4的右半部分（由正面觀看前壁部 3時的右半部分）之右門6所構成的。如圖1所示，左門 5係配置於正前側（防濺蓋2的外側，在圖3爲紙面之深 部側），右門6係配置於深部側（防濺蓋2的內側，在圖 -10- (8) 1295214 3爲紙面正前側）。在右門6的前面的右側下部設 10 ° 在已將開口部4封閉之狀態，當以把手1 0將 朝左側移動時，則如圖3至圖5所示，左門5也追 動而朝左側（圖3至圖5右側）移動，使得開口部 。如圖3所示，在左門5、右門6之大致中央分別 璃窗部5 a、6a，藉由從外側觀看該玻璃窗部5 a、€ • 確認防濺蓋2內之加工區域。如圖1所示，在前壁 開口部4的右側，設有用以將操作此機具中心的動 作面板（未圖示）嵌入之大致呈長方形的固定孔 圖1、2所示，在防濺蓋2之右側面，可裝卸地設 械本體的維修用之檢查艙口 9。如圖1所示的防濺 當於「包圍機械本體之壁」。 說明關於前壁部3。如圖1、圖3及圖5所示 部3係形成在中央具備開口部4之正面視角大致呈 ® 字形，構成防濺蓋2之前面。此前壁部3係如圖1 由：大致呈水平地延設，構成前壁部3的下側部分 的大致呈長方形之第1前壁部3 a ;各自延設於由 前壁部3a的長方向兩端部大致呈垂直上方，且大 方形的第2前壁部3b、3b ;及架設於該第2前壁〗 3b的各上端部之間，構成前壁部3的上側部分之 長方形之第3前壁部3 c所構成的。開口部4成爲 些4個片所形成的大致呈長方形之開口部分（參照 圖5 )。 有把手 右門6 隨該移 4打開 設有玻 ia能夠 部3之 作之操 1 1。如 置有機 蓋2相 ，前壁 「□」 所示， 之橫長 該第1 致呈長 部3b ' 大致呈 藉由這 圖4、 -11 - (9) 1295214 如圖3至圖5所示，在位於左門5及右門6的上側之 第3前壁部3c，朝左右方向延設的上導軌60呈兩列地被 設置著（在圖3至圖5僅圖示單側）。在這2條上導軌 60係經由複數個配件（未圖示），固定於第3前壁部3 c 。藉由這些複數個配件中的一部分，使得2條上導軌60 被相互地連結，配設成前後2列。在這2條上導軌6 0中 ，爲深部側（圖中，紙面正前側）的上導軌60係將上導 • 軌60的上側予以保持，並且將其朝左右方向導引者。一 方面，正前側（圖中，紙面深部側）的上導軌（未圖示） 係將上導軌60的上側予以保持，並且將其朝左右方向導 引，由開口部4的大致中央部分延設至防濺蓋2的左側面 附近爲止。 如圖6所示，在第3前壁部3 c的裏面側，設有用來 使左門5追隨右門6的移動而移動之追隨機構。此追隨機 構係以固定於左門5的後述之突緣22的突出部22a (參 ® 照圖7 )，經由臂90a軸支的第1滑車90、與固定於突緣 22之左角部22b(參照圖7)，經由臂91a軸支之第2滑 車91爲主體所構成的，在這些第1滑車9〇及第2滑車 9 1之外周，懸掛有1條金屬線9 3。該金屬線9 3的長方向 兩端部被分別固定於設置在第3前壁部3 c的裏面之一對 固定部95、96。在右門6的後述之突緣23的上部，設有 用來連接至則述金屬線93之連結部97。當以把手1〇 (參 照圖1 )，將右門6朝左右的任一方向移動時，藉由這樣 的追隨機構，使得金屬線9 3經由連結部9 7朝該方向被拉 -12- (10) 1295214 引，第1滑車90及第2滑車91也朝該方向被拉引。左 5 —邊追隨右門6之移動’一邊移動。 如圖4、圖5所示，在位於左門5及右門6的下側 第1前壁部3 a的上端部附近，本體軌道支承部3 0朝左 方向延設而被設置著。此本體軌道支承部3 0係具備： 承左門5的下側，並且將其朝左右方向導引之導軌3 3 在本體軌道支承部30的左右方向延伸出來的長度係與 ® 口部4的下端部之長度大致相同。又’在開口部4的左 部，用來供後述的左門5之被卡合片27卡合而使左門 的移動停止之被卡合片4a朝前壁部3的裏面側突出而 設置著。在開口部4的右端部’設有延伸至下方且朝前 部3的裏面側突出之抵接部4b。針對本體軌道支承部 的詳細構造，稍後所述。 說明關於左門5。如圖7所示’在左門5的上端側 一體設有突緣22，在該突緣22，由上下兩側夾持上述 ^ 軌（未圖示）而滾動之上滾棒6 1及下滾棒62成爲一對 軸支承著。這些上滾棒6 1及下滾棒62分別被設置於突 22的左右兩端部附近。在左門5的下端側’設有滾子 承部40，其係朝左右方向延設，並且與左門5移動而 開口部4封閉之方向平行地延伸出來，在該滾子支承 40與左門5的下端部之間，設有保護片80 ’其係朝左 方向延設，具有朝左門5的後方側突出而折返的倒「< 字形的斷面。在左門5的左端部，設有爲了卡合於開口 4的被卡合片4a (參照圖1)而朝前方突出之被卡合片 門 之 右 支 〇 開 端 5 被 壁 30 導 而 緣 支 將 部 側 j 部 -13- 27 (11) 1295214 。在左門5的左右兩端部’分別設有一對被卡合片2 8 ’ 其係爲了供右門6的後述之卡合片3 7卡合而朝後方突出 (在圖7爲單方的圖示）。如圖7所示的左門5係相當於 「第1門」，而卡合片37(參照圖8)與一對被卡合片 2 8 (參照圖7 )相當於「連動機構」。 說明關於右門6。如圖8所示’在右門6的上端側’ 一體地設置突緣23，在該突緣23，由上下兩側夾持上述 # 導軌（未圖示）而滾動之上滾棒71及下滾棒72成爲一對 而軸支承著。又，這些上滾棒7 1及下滾棒72分別被設置 於突緣2 3的左右兩端部附近。一方面’在右門6的下端 側，設有朝左右方向延設之滾子支承部5 0 ’在該滾子支 承部50與右門6的下端部之間，設有保護片85，其係朝 左側方向延設，具有朝右門6的後方側突出而折返的倒「 <」字形的斷面。又’在右門6的右端部，上下各固定1 個用來緩和與開口部4的右側之抵接部4b接觸之際的衝 ® 擊的大致呈圓形之緩衝部3 9。圖8所示的右門6係相當 於「第2門」。 說明關於本體軌道支承部3 0。如圖9所示，本體軌 道支承部30係由：具有大致爲水平面，並且朝左右方向 延設，具有與開口部4 (參照圖5 )的下端部大致相同的 長度之大致呈帶狀的軌道支承片3 1 ;沿著與該軌道支承 片31的長方向正交之方向的一端部延設，朝對於軌道支 承片31的面大致垂直上方突設之大致呈帶狀的固定片32 :及沿著與前述軌道支承片31的長方向平行的中心線延 -14- (12) 1295214 設，並且由軌道支承片31的下面朝大致垂直下方突設之 大致呈帶狀的導軌33所構成的。又，在本體軌道支承部 3 0的長方向一端部，設有用來接觸於抵接部4b之接觸板 3 4，其係對於軌道支承片3 1的面正交。在固定片3 2的長 方向兩端部附近與大致中間部，分別穿設有用來沿著第1 前壁部3a (參照圖5 )的上端部加以固定之固定孔32a。 因本體軌道支承部3 0形成與開口部4 (參照圖5 )的下端 •部大致相同之長度，所以當開口部4藉由左門5及右門6 封閉時，本體軌道支承部3 0不會由開口部4的下端部突 出，而左門5及右門6位於本體軌道支承部30上。藉此 ，能夠防止切削屑落到本體軌道支承部3 0。圖9所示的 導軌3 3相當於「第1軌道」，軌道支承片3 1相當於「第 1支承片」。 說明關於滾子支承部40。如圖1 0所示，滾子支承部 40係由：具有大致爲水平面，並且朝左右方向延設之大 ® 致呈帶狀的滾子支承片4 1 ;由與該滾子支承片41的長方 向正交的方向之一端部的左端部（圖1 〇的左側）延設到 大致中央，突設於對於滾子支承片41的面大致呈垂直上 方之大致呈帶狀的固定片42 ;及沿著與前述滾子支承片 4 1的長方向平行之中心線延設’並且由前述滾子支承片 4 1的下面朝大致垂直下方突設之大致呈帶狀的導軌4 3所 構成的。在滾子支承片4 1的大致中央部與右端部附近， 設有2個滾子45、45，該2個滾子45、45係具備有與滾 子支承片4 1的面正交之軸心’且滾動於上述本體軌道支 -15- (13) 1295214 承部3 0的導軌3 3之側面上，且該該2個滾子相 在這些滾子45、45之間也就是固定片42側 側，設有位置調節體46，在該位置調節體46軸 子48。在此位置調節體46，穿設有一對固定孔 )，該一對固定孔係穿設於滾子45、45之間， 於滾子支承片41的長方向之方向具有長軸之一 未圖示）相對向。將位置調節體46抵接於滾子: # ，由位置調節體46的固定孔，將螺栓46a插入 承片41的長孔，以螺帽（未圖示）栓緊。藉由 .，使得位置調節體46可在與滾子支承片4 1的長 之方向移動。藉由在定位後再將螺帽栓緊，使得 體46固定，而將滾子48定位。 這些3個滾子45、48、45細沿著滾子支承f 方向，並且以與滾子支承片41的長方向平行的 境界，配置成鋸齒狀。滾子45、48、45係由兩 • 體軌道支承部30之導軌33 (參照圖9)，調節 體46之位置，而以滾子48按壓導軌33，藉此 滾子確實地接觸於導軌3 3之側面（參照圖1 4 ) 能夠防止滾子支承部40由導軌3 3脫離，而滾_ 、4 5可滾動於導軌3 3之側面上。又，在固定片 方向兩端部附近與大致中間部，分別穿設有用來 護片80的下端側之固定孔42a。 固定片42之長度係由於設定成與左門5的 同長度，故在被固定於左門5的下端側之情況時 互分離。 的一端部 支承著滾 (未圖不 與在正交 對長孔（ 芝承片4 1 到滾子支 鬆弛螺帽 方向正交 位置調節 t 41之長 中心線爲 側夾持本 位置調節 能夠使各 。藉此， F 45 ' 48 • 42的長 固定於保 下端部相 ，滾子支 -16· (14) 1295214 承片41及導軌43由左門5的右端部突出。藉此，沿著由 左門5的右端部突出之導軌43導引固定著滾子支承部50 之右門6。圖10所示的導軌43相當於「第2軌道」，滾 子支承片41相當於「第2支承片」，滾子45、48、45相 當於「第1滑動部（第1滾子）」。導軌43、與這些作 爲「第1滑動部」之滾子45、48、45相當於「第1導引 機構」。 # 說明關於滾子支承部5 0。如圖8、圖1 1所示，滾子 支承部50係由：具有大致爲水平面，並且朝左右方向延 設之大致呈帶狀的滾子支承片5 1 ;由與滾子支承片5 1的 長方向正交之方向的一端部朝大致垂直上方突設之大致呈 帶狀的固定片52 ;及分別沿著與前述滾子支承片51的長 方向平行之中心線穿設，且使飛散到滾子支承片5 1上的 切削屑落下用之一對切削屑落下孔5 7、5 7所構成。在滾 子支承片5 1之與設有固定片5 2的一端部相反之另一端部 ® 的兩端部附近，分別設有滾子5 5、5 5，該滾子5 5、5 5具 備有與滾子支承片5 1的面正交之軸心，且滾動於上述滾 子支承部40的導軌43之側面上。 在一對切削屑落下孔5 7、5 7之間，設有可再與滾子 支承片5 1的長方向正交之方向移動調節之位置調節體5 6 ，滾子58軸支承於該位置調節體56。在此位置調節體56 ，穿設有一對固定孔（未圖示），該一對固定孔設置於切 削屑落下孔5 7、5 7之間，與在與滾子支承片5 1的長方向 正交之方向具有長軸之一對長孔（未圖示）相對向。將位 -17- (15) 1295214 置調節體56抵接於滾子支承片51，由位置調節體56的 固定孔，將螺栓56a插入到滾子支承片5 1的長孔，以螺 帽（未圖示）栓緊。藉由鬆驰螺帽，使得位置調節體56 可在與滾子支承片51的長方向正交之方向移動。藉由在 定位後再將螺帽栓緊，使得位置調節體5 6被固定，而將 滾子5 8定位。 滾子5 8係配置於較其他滾子5 5、5 5更靠近固定片 ® 5 2側。在這些滾子5 8與滾子5 5、5 5之間，因配置有滾 子支承部40的導軌43，所以能夠由兩端夾入導軌43，可 防止由導軌43脫離（參照圖14 )。在固定片52之長方 向兩端部附近與大致中間部，分別穿設有用來固定於保護 片85的後述之第2保護片83之外側面的固定孔52a。用 來阻擋使得切削屑不會侵入到電裝模組82的內側之遮蔽 片5 3，以對於滾子支承片5丨的面正交的方式設置於滾子 支承片5 1之左端部。圖1 1所示的滾子支承片5 1相當於 ® 「第3支承片」，滾子5 5、5 8、5 5相當於「第2滑動部 (第2滾子）」。導軌43、與這些作爲「第2滑動部」 之滾子5 5、5 8、5 5相當於「第2導引機構」。 說明關於保護片8 0。如圖12所示，保護片8 0，其朝 左側方向延設，而與長方向正交之斷面形成：朝左門5的 後方側突出而折返的倒「<」字形。保護片8 0係以沿著 左門5的下端部連結，在由左門5的裏面側分離之方向朝 斜下方延設之大致呈帶狀的第1保護片82 ;及由該第1 保護片8 2的下端部朝大致垂直下方延設，將滾子支承部 -18- (16) 1295214 40的固定片42 (參照圖7)予以固定之大致呈帶狀的第2 保護片83爲主體所構成的。在第1保護片82及第2保護 片83之位於左門5的左側之各一端部之間，設有用來堵 塞該間隙之平面視角大致呈梯形的第3保護片84。在第2 保護片83，於相對於滾子支承部40的固定片42之固定 孔42a的位置，分別穿設有固定孔83a。藉由滾子支承部 40的固定片42之外側面抵接到第2保護片83之內側面 φ ，而使固定孔42a與固定孔83a相對向後，以螺栓25及 螺帽1 7 (參照圖1 4 )予以固定，使得滾子支承部40之固 定片42被固定於保護片80之第2保護片83 (參照圖7 ) 。圖12所示的保護片80相當於「第1保護片」。 說明關於保護片85。如圖13所示，保護片85，其朝 左側方向延設，而與長方向正交之斷面形成：朝右門6的 後方側突出而折返的倒^ <」字形。保護片85係由：沿 著右門6的下端部連結，在由右門6的裏面側分離之方向 ® 朝斜下方延設之大致呈帶狀的第1保護片86 ;及由該第1 保護片86的下端部朝大致垂直下方延設，將滾子支承部 50的固定片52 (參照圖11 )予以固定之大致呈帶狀的第 2保護片87所構成的。在第2保護片87，於相對於滾子 支承部50的固定片52之固定孔52a的位置，分別穿設有 固定孔8 7a。藉由滾子支承部5 0的固定片5 2之外側面（ 參照圖1 1 )抵接到第2保護片87之內側面，而使固定孔 5 2a與固定孔87a相對向後，以螺栓26及螺帽18 (參照 圖1 4 )予以固定，使得滾子支承部5 0之固定片5 2固定 -19- (17) 1295214 於保護片85之第2保護片87 (參照圖8 )。圖13所示的 保護片8 5相當於「第2保護片」。 說明關於本體軌道支承部3 0與滾子支承部40之連結 構造。如圖14所示，固定於第1前壁部3a之本體軌道支 承部30的導軌33係由兩側藉由軸支承於滾子支承部40 的滾子支承片41之3個滾子45、48、45來夾持。這些滾 子45、48、45滾動於導軌33的兩側面中之任一側面。因 # 此，滾子支承部40能藉由本身的滾子45、48、45，不會 鬆弛地夾入本體軌道支承部30的導軌33，所以滾子支承 部40係能夠沿著導軌3 3，不會振動或晃動，而圓滑地移 動。 說明關於滾子支承部40與滾子支承部50之連結構造 。如圖14所示，藉由本體軌道支承部3 0的導軌3 3可移 動地被保持之滾子支承部4 0的導軌4 3，係由兩側藉由軸 支承於滾子支承部50的滾子支承片51之3個滾子55、 籲 58、55來夾持。這些滾子55、58、55滾動於導軌43的 兩側面中之任一側面。因此，滾子支承部5 0能藉由本身 的滾子55、58、55，不會鬆弛地夾入滾子支承部40的導 軌4 3，所以滾子支承部5 0係能夠沿著導軌4 3，不會振動 或晃動，而圓滑地移動。 在上述連結構造，如圖1 4所示，本體軌道支承部3 0 之導軌3 3係受到保護片8 0及保護片8 5所包圍。如圖3 所示，在開口部4藉由左門5及右門6所封閉之狀態下， 本體軌道支承部30之導軌33係受到保護片80及保護片 -20- (18) 1295214 8 5所完全地覆蓋。藉此，能夠防止在機具中心運轉中， 由加工區域所飛散之切削屑附著堆積於導軌3 3 ’且可圓 滑地保持左門5之移動。 參照圖1 5〜1 7，說明關於左門5及右門6的移動之 各滾子的移動狀態。如上所述，在圖1 5至圖1 7，由於圖 示前壁部3之內面側，故爲了說明上之方便，將圖中右側 作爲「前壁部3之左側」，圖中左側作爲「前壁部3之右 •側」。 如圖1 5所示，在開口部4被打開之情況時，左門5 及右門6均位於左側。此時，左門5的滾子支承部40.之 滾子4 5、4 8、4 5係位於比起右門6的滾子支承部5 0之滾 子5 5、5 8、5 5更靠近封閉方向側（圖1 5中左側）。而在 此狀態下，除了本體軌道支承部30的導軌33之左端部（ 圖1 5中左側）以外之大部分露出。又，滾子支承部5 0之 滾子5 5、5 8、5 5係與位於防濺蓋2的左側之滾子支承部 • 40的導軌43之左側側面接觸。 如圖1 6所示，當握住右門6的把手1 0 (參照圖1 ) ，朝右側（圖1 6中左側）移動時，則右門6的滾子支承 部50之滾子55、58、55滾動於左門5的滾子支承部40 之導軌43，當移動至導軌43之大至中間位置爲止時，右 門6係移動到開口部4的大致中央附近。藉由上述追隨機 構，左門5追隨右門6之移動，稍慢而朝右側開始移動。 此時，左門5的滾子支承部40之滾子45、48、45滾動於 本體軌道支承部3 0的導軌3 3上。當左門5朝右側移動時 -21 - (19) 1295214 ，因該左門5的滾子支承部40之導軌43也一 移動，所以右門6也同時朝右側移動相當左門 離量。藉此，能夠將移動於導軌43上的右門 離作成實際的右門6之移動距離的大致一半。 迅速地進行右門6之開閉’可減輕伴隨開閉之 ，開口部4藉由這些右門6及左門5逐漸地封| 如圖17所示，右門6的滾子支承部5 0二 Φ 58、55形成與左門5的滾子支承部40之滾子 大致相同位置，並且藉由右門6的緩衝部3 9 ’ 開口部4的右端之抵接部4b，使得右門6的 此時，保護片80、85完全地覆蓋本體軌道支薄 軌3 3 (參照圖15、16 )。因在已將開口部4 下，機具中心開始進行切削加工，所以由加工 的切削屑或冷卻劑會接觸到保護片80、85， 止切削屑堆積到本體軌道支承部3 0之導軌3 3 ® 部40之導軌43也由於延設於大致垂直下方， 屑或冷卻劑的飛沫接觸也會落下。能夠經常圓 動於導軌33之滾子45、48、45、與滾動於導 子5 5、5 8、5 5的移動動作。 如上所說明，本實施形態之門裝置20係 機械也就是機具中心的防濺蓋2之開口部4， 具備可將開口部4伸縮地開閉的左門5及右門 在此門裝置20，在已將開口部4封閉之際， 左門5及右門6的下端部之保護片80、85將 同地朝右側 5之移動距 6之移動距 藉此，能夠 勞力。然後 閉。 匕滾子5 5、 45 、 48 、 45 、39抵接到 移動停止。 k部3 0之導 封閉之狀態 區域所飛散 因此能夠防 。滾子支承 故即使切削 滑地維持滾 軌4 3之滾 設置於工作 具體而言， 6之裝置。 分別設置於 用來將左門 -22- (20) 1295214 5的下側朝左右導引的本體軌道支承部3 0之所有的導軌 3 3隱藏。藉此，能夠防止切削屑堆積到導軌3 3上。由於 將右門6的下側朝左右導引的滾子支承部40之導軌43大 致朝垂直下方延設，故即使切削屑接觸到導軌43也會落 下。因此，可使左門5及右門6經常圓滑地移動。因本體 軌道支承部3 0形成與開口部4 (參照圖5 )的下端部大致 相同長度，所以在開口部4受到左門5及右門6所關閉時 # ，本體軌道支承部3 0不會由開口部4的下端部突出，而 使左門5位於本體軌道支承部3 0上。藉此，能夠防止切 削屑掉落到本體軌道支承部3 0上。因當左門5朝右側移 動時，該左門5的滾子支承部40之導軌43也一同朝右側 移動，所以右門6也能夠朝右側同時移動相當於左門5的 移動距離量。藉此，能夠將移動於導軌43上的右門6之 移動距離作成實際的右門6的移動距離之大致一半。因此 ，能夠迅速地進行右門6之開閉，可減輕伴隨開閉之勞力 •。 再者，本發明之門裝置，可進行各種變形。 例如，上述實施形態的左門5及右門6之開閉構造， 係藉由本體軌道支承部3 0、滾子支承部40及滾子支承部 5 〇等所構成，但亦有藉由改變構成這些的軌道及滾子之 安裝組合，達到至少3個變形例。其次，參照圖1 8及圖 20說明關於這3個變形例。 圖1 8係顯示開閉構造的第1變形例之構造圖，圖1 9 係顯示開閉構造的第2變形例之構造圖，圖20係顯示開 -23- (21) 1295214 閉構造的第3變形例之構造圖。爲了與上述實施形態比較 ，而與圖1 4比較進行說明。 針對第1變形例，參照圖1 8進行說明。此第1變形 例之開閉構造係具備如圖1 4所示的本體軌道支承部3 0， 且具備與圖14所示的滾子支承部50之構造不同的滾子支 承部400、及與圖14所示的滾子支承部50之構造不同的 滾子支承部5 00。在此滾子支承部400之滾子支承片41 # 的上面，分別軸支承有與圖1 0所示相同之滾子4 5、4 5 ( 在圖1 8僅顯示1個），在滾子支承片41的下面，交互地 軸支承著滾子450、450(在圖18僅圖示1個）、480。 滾子4 8 0係爲可位置調節之滾子。在滾子支承片4 1的下 面，未設置有如圖14所示的導軌43。在滾子支承部500 的滾子支承片51之上面，設有導軌530，而未設有如圖 14所示的滾子55、55(在圖14僅顯示1個）、58。如此 ，在第1變形例，將所有的滾子軸支承於滾子支承部4 0 0 ® 的滾子支承片41之兩面，在滾子支承部5 00的滾子支承 片51設置導軌5 3 0爲其特徵。 參照圖1 9說明關於第2變形例。此第2變形例的開 閉構造係具備有：與圖1 4所示的本體軌道支承部3 0之構 造不同的本體軌道支承部3 00、與圖14所示的滾子支承 部40之構造不同的滾子支承部401、及圖18所示的第1 變形例之滾子支承部5 0 0。在此本體軌道支承部3 0 〇的軌 道支承片31之下面，交互地被軸支承著與圖10所示的滾 子相同之滾子350、350(在圖19僅圖示1個）、380。 -24- (22) 1295214 未設有圖1 4所示的導軌3 3。滾子3 8 0爲可位置調節之滾 子。在滾子支承部401的滾子支承片41之上面，未設有 圖14所示的滾子45、45(在圖14僅顯示1個）、48， 而設有導軌430。在滾子支承片41的下面，交互地軸支 承著與如圖1 8所示的第1變形例相同之滾子4 5 0、4 5 0 ( 在圖19僅顯示1個）、4 8 0。如此’在第2變形例，將各 導軌4 3 0、5 3 0分別設置於各滾子支承片4 1、5 1，且均朝 修上述突出成豎立狀爲其特徵。 參照圖2 0說明關於第3變形例。此第3變形例的開 閉構造係具備有：圖19所示的本體軌道支承部3 00、與 圖14所示的滾子支承部40之構造不同的滾子支承部402 、及圖1 4所示的滾子支承部5 0。在滾子支承部402的滾 子支承片41，未設有圖14所示的滾子45、45(在圖14 僅顯示1個）、48，並未設有任何的滾子。而是以在滾子 支承片41的上面設置導軌43 0，在滾子支承片41的下面 •，設置與圖1 4所示相同之導軌43來加以取代。如此，在 第3變形例，在滾子支承部402的滾子支承片41之上面 及下面，導軌430、導軌43分別朝上方向及下方向設置 爲其特徵。 藉由以上的3個變形例，使得上述實施形態之左門5 及右門6之開閉構造可進行變形。 又，除了上述變形例以外，尙可進行各種變形。例如 ，左門及右門的移動形態，亦可使用習知之滑軌形態。此 滑軌由外軌、中間軌、內軌及鋼球等所構成，藉由外軌內 -25- (23) 1295214 的中間軌及內軌滑動於鋼球上，由外軌內加以拉出者。 可作成安裝於這些左門及又門的下側’將保護片分別安 於左門及右門的下端部，以覆蓋各軌道之構造。 在本實施形態，在滾子支承部40上，將3個滾子 、48、45呈鋸齒狀配置於滾子支承部40上，其間夾入 體軌道支承部3 0之導軌3 3，但例如亦可作成藉由在與 子支承片的長方向正交之方向的兩端部，設置朝垂直下 鲁突設的一對導軌，配置將其內側排列設置成直線狀的複 個滾子，來使滾子滾動於一對導軌的內側面者。再者， 對滾子支承部5 0亦可作成相同之構造。 本發明之門裝置，不僅可適用於在上述實施形態所 述之工作機械，亦可使用於具備用以開關本體的開口部 複數個門者。 本揭示係關於包含於2005年01月31日申請之日 國特許出願第2005 _023 1 5 7號之內容，能將該所有內容 修照置入到本發明案中。 【圖式簡單說明】 圖1係使用於機具中心之防濺蓋的全體斜視圖。 圖2係防濺蓋的右側面圖。 圖3係由圖2所示的A-A線箭號視角所觀看之前 部的裏面圖（開口部呈封閉狀態）。 圖4係由圖2所示的A - A線箭號視角所觀看之前 部的裏面圖（開口部呈半封閉狀態）。 亦 裝 4 5 本 滾 方 數 針 陳 之 本 參 壁 壁 -26- (24) 1295214 圖5係由圖2所示的A-A線箭號視角所觀看之前壁 部的裏面圖（開口部呈開放狀態）。 圖6係圖3所示的第3前壁部附近之部分放大圖。 圖7係由左門的前方所觀看之斜視圖。 圖8係由右門的前方所觀看之斜視圖。 圖9係本體軌道支承部之斜視圖。 圖1 〇係滾子支承部之斜視圖。 圖1 1係滾子支承部之斜視圖。 圖1 2係連結於左門的下端部之保護片附近的斜視圖 〇 圖1 3係連結於右門的下端部之保護片附近的斜視圖 〇 圖14係圖5所示的Β-Β線箭號方向之斷面圖。 圖15係顯示由圖2所示的Α-Α線箭號方向所觀看的 左門及右門的移動狀態之動作說明圖（開口部呈開放狀態 )° 圖16係顯示由圖2所示的Α-Α線箭號方向所觀看的 左門及右門的移動狀態之動作說明圖（開口部呈半開放狀 態）。 圖17係顯示由圖2所示的Α-Α線箭號方向所觀看的 左門及右門的移動狀態之動作說明圖（開口部呈封閉狀態 )° 圖1 8係顯示封閉構造的第1變形例之構造圖。 圖1 9係顯示封閉構造的第2變形例之構造圖。 -27- (25) (25)1295214 圖20係顯示封閉構造的第3變形例之構造圖。 【主要元件符號說明】 1 :機具中心 2 :防濺蓋 3 :前壁部 3 a :第1前壁部 3b :第2前壁部 3 c :第3前壁部 4 :開口部 4a :被卡合片 4b :抵接部 5 :左門 5 a :玻璃窗部 6 :右門 6a :玻璃窗部 8 =機床安裝部 9 :檢查艙口 1 0 :把手 1 1 :固定孔 1 7、1 8 :螺帽 2 5、2 6 :螺栓 27 :被卡合片 28 :被卡合片 -28- (26) (26)1295214 3 Ο :本體軌道支承部 3 1 ’·軌道支承片 32 :固定片 3 3 :導軌 3 4 :接觸板 3 7 :卡合片 3 9 :緩衝部 40 :滾子支承部 4 1 :滾子支承片 42 :固定片 42a :固定孔 43 ：導軌 4 5 :滾子 4 6 :位置調節體 4 6 a :螺栓 4 8 :滾子 5 〇 :滾子支承部 5 1 :滾子支承片 52 :固定片 52a :固定孔 53 :遮蔽片 5 5 :滾子 5 6 :位置調節體 5 6 a :螺栓 -29- (27) (27)1295214 57 :切削屑落下孔 5 8 :滾子 60 :上導軌 61 :上滾棒 62 :下滾棒 71 :上滾棒 7 2 :下滾棒 80 :保護片 82 :第1保護片 83 :第2保護片 8 3 a :固定孔 84 :第3保護片 85 :保護片 8 6 :第1保護片 87 :第2保護片 8 7 a :固定孔 9 0 :第1滑車 90a :臂 91 :第2滑車 91a :臂 9 3 :金屬線 9 5、9 6 :固定部 9 7 :連結部 3 5 0 :滾子 (28) 1295214 3 8 Ο :滾子 400 :滾子支承部 4 0 1 :滾子支承部 402 :滾子支承部 430 :導軌1295214 (1) EMBODIMENT OF THE INVENTION [Technical Field] The present invention relates to a door device and a door device therefor, and relates to a door device for opening and closing a wall by moving a plurality of doors, and The working machine of the door device. [Prior Art] _ In the past, the center of the machine tool for working machines (the machine for machining the workpiece (work; the workpiece) became the iron machine bed of the machine body, and was installed to cover the machine. A splash cover is provided around the body. The splash cover protects the machine from the outside and prevents the chips scattered by the mechanical body from scattering to the outside. In front of the splash cover, a front view is provided. In the rectangular portion, a door device that opens and closes at least two doors in parallel with the opening portion is provided in the opening portion. Thereby, the operator slides the doors in parallel with each other to open the opening portion, and the workpiece is set by the workpiece. On the platform of the mechanical body. In such a door device, it is proposed, for example, to sew the slit to position the guide roller along the downstream gate of the a line of rail. a door device that is adjacent to the upstream of the guide roller, so that a plurality of the doors are independent, and can be supported to move in parallel along one side of the rail (refer to Japanese Patent Publication No. 3-26 1 74 1). Due to Guide mechanical, detailed center of the opening) mechanical body; and . In the box-type splash-proof cover body of the machine tool, the opening portion of the pollution-shaped portion is moved in the same direction, so that the opening and closing openings can be formed in the door, and the guides of the other doors located in the extending direction are privileged. The other side of the rail (1) 1295214 on the opposite side of the side does not need to be provided with a space for the door, so that the door device can be miniaturized. However, the door device described in Japanese Patent No. 3,261, 741 is provided with a rail for preventing the lower end portion of each door from being slidably embedded (in a state having a margin), and the door is closed. In the state, a part of the rail is exposed in the outer casing (splash prevention cover). Therefore, when a large amount of chips are scattered by the mechanical body, there is a problem of accumulation of chips on the track. Further, when the door is opened and closed in this state, the lower end portion of the door is mounted on the chips deposited on the rail, and the door does not smoothly move, causing difficulty in opening and closing the door. . SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and an object thereof is to provide a door device in which foreign matter does not accumulate on a rail when a plurality of doors are closed, and a working machine including the door device . In order to achieve the above object, the door device of claim 1 includes a door device that is provided in an opening portion surrounding a wall of the machine body, and a plurality of doors that are formed by at least two openings that open and close the opening portion, and are characterized in that: The first guiding mechanism includes a lower end portion of the door side of the plurality of doors along a lower end portion of the opening portion in a range of substantially the same length as a lower end portion of the opening portion The second guiding mechanism 'and the other lower end portion of the door different from the door on the side of the wall are guided along the longitudinal direction of the lower end portion of the door on the side of the wall. Further, the apparatus of claim 2 is the structure of the present invention, wherein the first guiding mechanism is provided along a lower end portion of the opening, a first rail having substantially the same length as a lower end portion of the opening; a first sliding portion that slides on the first rail in the vicinity of a lower end portion of the door provided on the wall side, and the second guiding mechanism The second rail is provided on the support member that supports the first sliding portion, and the second rail that is slid to the second rail and is provided in the vicinity of the lower end portion of the other door. Further, the apparatus of claim 3 is the structure of the invention according to claim 2, wherein each of the plurality of doors is provided at a lower end portion thereof for covering a part of the first track to be protected. The protective sheet, when the opening is closed by the plurality of doors, all portions of the first track are hidden by a plurality of the protective sheets. The apparatus according to claim 2 or 3, wherein the first sliding portion and the second sliding portion are rollers, and the first rail and the second rail system are the first rail and the second rail system. For the aforementioned roller rolling track _ road. The structure of the invention according to any one of claims 2 to 4, wherein the plurality of doors are the first door of the door on the wall side and the other door In the second door, the first sliding portion is a first roller that is disposed in the vicinity of a lower end portion of the first door and that is rolled on the first rail, and the second sliding portion is provided at a lower end of the second door. In the vicinity of the portion, the second roller 'rolled on the second track' includes an interlocking mechanism that moves the opening and closing of the second door to open and close the first door. And the structure of the invention according to claim 5, wherein the interlocking mechanism is engaged by the engaging piece provided in the second door, and is respectively locked. The two ends of the first door in the moving direction are locked to the pair of engaged sheets of the engaging piece, and the engaging piece is disposed between the pair of engaged pieces. When the two doors are moved, at least one of the pair of engaged sheets is engaged with the engaging piece, so that the first door moves in conjunction with the movement of the second door, and The structure of the invention according to any one of claims 2 to 6, wherein the lower end portion of the opening portion is substantially horizontally protruded along a rear side of the wall a first support piece for supporting the first track; and a lower end portion of the first door projecting substantially horizontally toward the wall side, and extending horizontally in a direction in which the first door is closed a second support piece for supporting the second track. The apparatus according to claim 7, wherein the first track is protruded from a lower surface of the first support piece in a substantially vertical direction, and the second track system is provided. The lower surface of the second support piece protrudes in a substantially vertical direction. Further, the door device of claim 9 is the structure of the invention according to claim 8, wherein the third support piece that protrudes substantially horizontally from the lower front end portion of the second door toward the wall side is provided. The first roller is pivotally supported on the upper surface of the second support piece and rolled on a side surface of the first rail, and the second roller shaft is pivoted to the upper surface of the third support piece (5) 1295214 and Rolling on the side of the aforementioned second track. The invention of claim 1 is the structure of the invention according to claim 9, wherein the protective sheet is composed of a first protective sheet and a second protective sheet, and the first protective sheet is erected Between the lower end portion of the first door and one end portion of the second support piece that is separated from the inner surface of the wall, a part of the first track in the longitudinal direction is covered, and the second protective piece is erected Between the lower end portion of the second door and one of the ends of the third branch piece separated from the inner side of the wall, 'the portion for covering the portion covered by the first protective sheet Further, the apparatus of claim 1 is the structure of the invention of claim 9 or claim 1, wherein the first roller or the second roller is provided in plurality, and each of the first The support piece or the third support piece is arranged in series, and the first roller or the second roller adjacent to each other is disposed on the opposite side with the first rail or the second rail sandwiched between the centers. Further, the working machine of claim 12, comprising: a machine body for machining the workpiece; and a cover member surrounding the processing region of the machine body; and having at least an opening provided in the cover member and opening and closing the opening portion A working machine of a plurality of doors composed of two fans, characterized in that it has any one of the door devices described in claims 1 to 11. [Embodiment] Hereinafter, a door device 2 according to an embodiment of the present invention will be described. Fig. 1 is a perspective view of the entire splash guard 2 used in the center of the implement. Figure 2 is a right side view of the (6) 1295214 splash cover 2. Fig. 3 is a plan view of the front wall portion 3 viewed from the A-A line arrow angle shown in Fig. 2 (the opening portion 4 is closed). Fig. 4 is a plan view of the front wall portion 3 viewed from the A-A line arrow angle view shown in Fig. 2 (the opening portion 4 is in a semi-closed state). Fig. 5 is an inside view of the front wall portion 3 as viewed from the A-A line arrow angle view shown in Fig. 2 (the opening portion 4 is in an open state). Fig. 6 is a partially enlarged view showing the vicinity of the third front wall portion 3c shown in Fig. 3. Fig. 7 is a perspective view as seen from the front of the left door 5. Fig. 8 is an oblique view from the front of the right door 6. Figure 9 is a perspective view of the body rail support portion 30. Fig. 1 is a perspective view of a skating roller support portion 40. Fig. 1 is a perspective view of the roller support portion 50. Fig. 1 is a perspective view showing the vicinity of the protective sheet 80 connected to the lower end portion of the left door 5. Fig. 1 is a perspective view showing the vicinity of the protective sheet 8 5 joined to the lower end portion of the right door 6. Fig. 14 is a sectional view showing the arrow direction of the B-B line shown in Fig. 5. Fig. 15 is a view showing an operation of the movement state of the left door 5 and the right door 6 viewed from the arrow direction of the A-A line shown in Fig. 2 (the opening portion 4 is in an open state). Fig. 1 is an explanatory view showing the movement of the left door 5 and the right door 6 viewed from the direction of the arrow A-A of Fig. 2 (the opening portion 4 is in a semi-open state). Fig. 1 is a view showing the operation of the movement state of the left door 5 and the right door 6 viewed from the arrow direction of the A-A line shown in Fig. 2 (the opening portion 4 is in a closed state). In addition, in FIGS. 3 to 5 and FIGS. 15 to 17, in order to illustrate the inside of the front wall portion 3, the right side in the drawing is referred to as "the left side of the front wall portion 3" for convenience of explanation. The left side will be described as "the right side of the front wall portion 3". The X-axis direction of the center 1 of the implement refers to the left-right direction of the center 机 of the implement, and the Y-axis direction refers to the depth direction of the center 1 of the implement (the front-rear direction -9 - (7) 1295214), and the Z-axis direction refers to the up and down direction of the center 1 of the implement. . The door device 20 of the present embodiment is provided in the opening 4 of the splash guard 2 of the machine tool, that is, the center of the machine. Specifically, the door device 20 is provided with a left door 5 and a right door 6 that open and close the opening portion 4. Explain the approximate structure of the splash cover 2. The splash cover 2 shown in Fig. 1 is attached to a machine tool which is a base which is a center of the implement (not shown), and surrounds the mechanical body for protecting the workpiece. A machining area of the mechanical body is provided on the φ side of the splash cover 2, and a flying raft system such as chips or coolant discharged from the processing area can collide with the inner wall of the splash cover 2 And fall to prevent external pollution. As shown in Fig. 1, the splash cover 2 is formed into a box shape having a substantially rectangular parallelepiped shape. Further, the top surface and the bottom surface of the splash cover 2 are opened, and the front wall portion 3 is provided on the front surface. The front wall portion 3 is provided with an opening portion 4 (see FIGS. 4 and 5) for taking out a workpiece having a substantially rectangular front view, and is provided with a door device for opening and closing the opening portion 4 of the present invention. 2 0. In the door device 20, for example, two doors made of an iron plate that is formed in a substantially rectangular shape and that is telescopically slidable are provided. On the bottom side of the cover 2, a machine tool mounting portion 8 fixed to the machine tool is provided. As shown in FIGS. 1 and 3, the two doors are used to close the left door 5 of the left half of the opening 4 (the left half when the front wall portion 3 is viewed from the front), and to close the opening 4 The right half 6 of the right half (the right half of the front wall portion 3 when viewed from the front) is formed. As shown in Fig. 1, the left door 5 is disposed on the front side (the outside of the splash cover 2, on the deep side of the paper surface in Fig. 3), and the right door 6 is disposed on the deep side (the inside of the splash cover 2, in Fig. 10) - (8) 1295214 3 is the front side of the paper). 10 ° is provided on the lower right side of the front side of the right door 6 . When the opening 4 is closed, when the handle 10 is moved to the left side, as shown in FIGS. 3 to 5 , the left door 5 is also chased toward the left side. (Fig. 3 to Fig. 5 right side) moves to make the opening. As shown in Fig. 3, the glass window portions 5a, 6a are respectively viewed from the outside in the center of the left door 5 and the right door 6, and the processing region in the splash cover 2 is confirmed by the glass window portion 5a. As shown in Fig. 1, a substantially rectangular fixing hole for inserting an operation panel (not shown) for operating the center of the implement is provided on the right side of the front wall opening 4, as shown in Figs. The right side of the 2, the inspection hatch 9 for the maintenance of the detachable mechanical body. The splash-proof shown in Figure 1 is the "wall surrounding the mechanical body." The description relates to the front wall portion 3. As shown in Fig. 1, Fig. 3, and Fig. 5, the portion 3 having the opening portion 4 at the center has a substantially K-shaped front view, and constitutes the front surface of the splash cover 2. The front wall portion 3 is formed substantially horizontally as shown in Fig. 1, and constitutes a substantially rectangular first front wall portion 3a constituting a lower portion of the front wall portion 3; each of which is extended by the length of the front wall portion 3a. Both ends of the front wall portion are substantially vertically upward, and the second square front wall portions 3b and 3b and the upper end portions of the second front wall 3b are formed between the upper end portions of the front wall portion 3 to form a rectangular portion of the upper side portion of the front wall portion 3. The third front wall portion 3c is formed. The opening portion 4 is a substantially rectangular opening portion formed by four sheets (see Fig. 5). There is a handle. The right door 6 is opened with the move 4 and the glass ia can be used for the operation of the part 3 1 1 . If the two layers of the organic cover are placed, the front wall "□" is shown, and the horizontal length of the first long portion 3b' is substantially as shown in Fig. 4, -11 - (9) 1295214 as shown in Figs. The upper rails 60 extending in the left-right direction are provided in two rows in the third front wall portion 3c located on the upper side of the left door 5 and the right door 6 (only one side is illustrated in FIGS. 3 to 5). The two upper rails 60 are fixed to the third front wall portion 3c via a plurality of fittings (not shown). The two upper rails 60 are connected to each other by a part of the plurality of fittings, and are arranged in two rows of front and rear. Among the two upper rails 60, the upper rail 60 on the deep side (the front side of the paper surface in the figure) holds the upper side of the upper rail 60 and guides it in the left-right direction. On the other hand, the upper rail (not shown) on the front side (in the drawing, the deep side of the paper) holds the upper side of the upper rail 60 and guides it in the left-right direction, and is extended by the substantially central portion of the opening 4. Until the left side of the splash cover 2 is near. As shown in Fig. 6, on the back side of the third front wall portion 3c, a follow-up mechanism for moving the left door 5 following the movement of the right door 6 is provided. This follow-up mechanism is a first portion 12a that is fixed to the flange 22 of the left door 5, which will be described later, and a left portion 22b that is fixed to the flange 22 via the arm 90a (see FIG. 7). Referring to Fig. 7), the second pulley 91 that is pivotally supported by the arm 91a is mainly composed of a main body, and one metal wire 913 is suspended around the outer circumference of the first pulley 9'' and the second pulley 9'. Both ends in the longitudinal direction of the wire 93 are fixed to the pair of fixing portions 95 and 96 provided on the inner side of the third front wall portion 3c. A coupling portion 97 for connecting to the metal wire 93 described later is provided at an upper portion of the flange 23 of the right door 6 which will be described later. When the right door 6 is moved in either of the left and right directions by the handle 1 (refer to FIG. 1), the wire 9 is pulled in the direction by the connecting portion 97 by the follow-up mechanism. 1295214 The first block 90 and the second block 91 are also pulled in this direction. Left 5 - follow the movement of the right door 6 while moving. As shown in Figs. 4 and 5, the main body rail supporting portion 30 is extended in the left direction in the vicinity of the upper end portion of the lower left door 5 and the right door 6 at the lower side of the first front wall portion 3a. The main body rail support portion 30 is provided with a lower side of the left side door 5, and a length of the guide rail 3 3 that guides it in the left-right direction in the left-right direction of the main body rail support portion 30 and a lower end of the mouth portion 4 The length of the department is roughly the same. Further, in the left portion of the opening portion 4, the engaged piece 4a for engaging the engaged piece 27 of the left door 5, which will be described later, and the movement of the left door is stopped, and is protruded toward the back side of the front wall portion 3. The right end portion ' of the opening portion 4 is provided with an abutting portion 4b that extends downward and protrudes toward the back side of the front portion 3. The detailed configuration of the body rail support portion will be described later. Explain about the left door 5. As shown in Fig. 7, 'the upper end side of the left door 5 is integrally provided with a flange 22 on which the above-mentioned rails (not shown) are sandwiched by the upper and lower sides to roll the upper roller 6 1 and roll down. The rod 62 is supported by a pair of shafts. These upper roller bars 6 1 and lower roller bars 62 are respectively disposed near the left and right end portions of the projections 22. On the lower end side of the left door 5, a roller bearing portion 40 is provided which is extended in the left-right direction and extends in parallel with the direction in which the left door 5 moves and the opening portion 4 is closed, in which the roller supports 40 and the left door 5 Between the lower end portions, a protective sheet 80' is provided which is extended in the left direction and has a rearward side that protrudes toward the rear side of the left door 5 and is folded back. < The section of the glyph. At the left end portion of the left door 5, a right branch opening end 5 of the engaged piece door projecting toward the front to be engaged with the engaged piece 4a (refer to FIG. 1) engaged with the opening 4 is guided by the wall 30 and the edge is branched. Department side j--13- 27 (11) 1295214. In the left and right end portions of the left door 5, a pair of engaged sheets 28 are provided, respectively, so as to be engaged with the engaging pieces 37 which will be described later for the right door 6, and protrude rearward (in FIG. 7 is a single illustration) . The left door 5 shown in Fig. 7 corresponds to the "first door", and the engaging piece 37 (see Fig. 8) and the pair of engaged pieces 28 (see Fig. 7) correspond to the "linking mechanism". Explain about the right door 6. As shown in FIG. 8, 'the upper end side of the right door 6' is integrally provided with a flange 23, and the above-mentioned # guide rail (not shown) is held by the upper and lower sides, and the upper roller 71 and the lower roll are rolled. The rods 72 are paired and supported by the shaft. Further, these upper rolling bars 7 1 and lower rolling bars 72 are respectively provided in the vicinity of the right and left end portions of the flange 2 3 . On the other hand, a roller support portion 50' extending in the left-right direction is provided on the lower end side of the right door 6, and between the roller support portion 50 and the lower end portion of the right door 6, a protective sheet 85 is provided. The left side is extended, and has a rearward side that protrudes toward the rear side of the right door 6 and turns back. <" section of the glyph. Further, at the right end portion of the right door 6, one substantially vertical circular buffer portion 39 for urging the contact with the right abutting portion 4b of the opening portion 4 is fixed. The right door 6 shown in Fig. 8 corresponds to the "second door". The main body rail support portion 30 will be described. As shown in FIG. 9, the main body rail support portion 30 is a substantially strip-shaped rail having a substantially horizontal plane and extending in the left-right direction and having substantially the same length as the lower end portion of the opening portion 4 (see FIG. 5). The support piece 3 1 is extended along one end portion in a direction orthogonal to the longitudinal direction of the rail support piece 31, and is formed in a substantially strip-shaped fixing piece 32 which protrudes substantially perpendicularly upward from the surface of the rail support piece 31: It is formed along a center line extending in the longitudinal direction of the track supporting piece 31 by a length -14 - (12) 1295214, and is formed by a substantially strip-shaped guide rail 33 projecting from a lower surface of the rail supporting piece 31 toward a substantially vertical downward direction. . Further, at one end portion of the main body rail supporting portion 30 in the longitudinal direction, a contact plate 34 for contacting the abutting portion 4b is provided, which is orthogonal to the surface of the rail supporting piece 31. Fixing holes 32a for fixing along the upper end portions of the first front wall portion 3a (see Fig. 5) are respectively formed in the vicinity of both end portions in the longitudinal direction of the fixing piece 32 and the substantially intermediate portion. Since the main body rail support portion 30 has substantially the same length as the lower end portion of the opening portion 4 (see FIG. 5), when the opening portion 4 is closed by the left door 5 and the right door 6, the main body rail supporting portion 30 is not The lower end portion of the opening portion 4 protrudes, and the left door 5 and the right door 6 are located on the body rail support portion 30. Thereby, it is possible to prevent the chips from falling to the body rail supporting portion 30. The guide rail 3 3 shown in Fig. 9 corresponds to the "first rail", and the rail support piece 31 corresponds to the "first support piece". The roller support portion 40 will be described. As shown in FIG. 10, the roller support portion 40 is composed of a large-sized strip-shaped roller supporting piece 4 1 having a substantially horizontal plane and extending in the left-right direction, and the roller supporting piece 41 of the roller supporting piece 41 The left end portion (the left side of FIG. 1 〇) of one end of the direction orthogonal to the longitudinal direction is extended to substantially the center, and is protruded from the substantially strip-shaped fixing piece 42 which is substantially vertically above the surface of the roller supporting piece 41; And a substantially strip-shaped guide rail 43 which is extended along a center line parallel to the longitudinal direction of the roller supporting piece 41 and which is protruded from a lower surface of the roller supporting piece 4 1 substantially vertically downward. . In the vicinity of the substantially central portion and the right end portion of the roller supporting piece 4 1 , two rollers 45 and 45 are provided, and the two rollers 45 and 45 are provided with an axis orthogonal to the surface of the roller supporting piece 4 1 . The heart 'rolls on the side of the guide rail 3 3 of the body rail branch -15-(13) 1295214, and the two roller phases are between the rollers 45, 45, that is, the fixing piece 42 On the side, a position adjustment body 46 is provided at which the body 46 shaft 48 is adjusted. In this position adjusting body 46, a pair of fixing holes are bored, and the pair of fixing holes are disposed between the rollers 45 and 45, and one of the long axes in the longitudinal direction of the roller supporting piece 41 is not shown. Show) relative. The position adjusting body 46 is abutted against the roller: #. The bolt 46a is inserted into the long hole of the receiving piece 41 by the fixing hole of the position adjusting body 46, and is bolted by a nut (not shown). By this, the position regulating body 46 can be moved in the direction of the length of the roller supporting piece 41. The roller 46 is positioned by pinning the nut after positioning to position the roller 48. These three rollers 45, 48, and 45 are arranged in a zigzag shape along the roller supporting f direction and in a state parallel to the longitudinal direction of the roller supporting piece 41. The rollers 45, 48, 45 are guided by the guide rails 33 (see Fig. 9) of the two-body rail support portion 30, and the position of the adjustment body 46 is adjusted, and the guide rails 33 are pressed by the rollers 48, whereby the rollers reliably contact the guide rails 3 The side surface of 3 (see Fig. 14) prevents the roller support portion 40 from being detached from the guide rail 3 3, and the rollers _, 45 can be rolled on the side surface of the guide rail 3 3 . Further, fixing holes 42a for the lower end side of the protective sheet 80 are respectively formed in the vicinity of both end portions in the direction of the fixing piece and the substantially intermediate portion. Since the length of the fixing piece 42 is set to be the same length as that of the left door 5, it is separated from each other when it is fixed to the lower end side of the left door 5. One end supports the roller (not shown in the orthogonal to the long hole (the position of the long axis of the orthogonal position of the tying piece 4 1 to the roller nut loosening nut direction t 41 is the side clamping position adjustment can enable Thereby, the length of F 45 ' 48 • 42 is fixed to the lower end phase, the roller branch -16 (14) 1295214 The carrier 41 and the guide rail 43 are protruded from the right end of the left door 5. Thereby, along the left door The guide rail 43 projecting at the right end portion of the fifth guide guides and fixes the right door 6 of the roller support portion 50. The guide rail 43 shown in Fig. 10 corresponds to the "second track", and the roller support piece 41 corresponds to the "second support piece". The rollers 45, 48, and 45 correspond to the "first sliding portion (first roller)". The guide rails 43 and the rollers 45, 48, and 45 serving as the "first sliding portions" correspond to the "first guiding mechanism". The roller support portion 50 is illustrated as shown in Fig. 8 and Fig. 11. The roller support portion 50 is a substantially strip-shaped roller bearing having a substantially horizontal plane and extending in the left-right direction. a sheet 5 1 ; a substantially strip-shaped portion projecting from an end portion orthogonal to the longitudinal direction of the roller supporting piece 51 The fixing piece 52; and the center line parallel to the longitudinal direction of the roller supporting piece 51, respectively, and the chip falling on the roller supporting piece 51 are dropped by a pair of chip falling holes 57. The roller support piece 51 is provided with rollers 5 5 and 5 5 in the vicinity of the end portions of the other end portion opposite to the one end portion where the fixing piece 52 is provided, and the roller is provided. 5 5, 5 5 are provided with an axis orthogonal to the surface of the roller supporting piece 51, and are rolled on the side surface of the guide rail 43 of the roller supporting portion 40. The pair of cuttings fall holes 5 7 and 5 7 Between the two, a position adjusting body 56 is provided which is movable in the direction orthogonal to the longitudinal direction of the roller supporting piece 51, and the roller 58 is pivotally supported by the position adjusting body 56. In this position, the adjusting body 56 is worn. A pair of fixing holes (not shown) are provided, and the pair of fixing holes are provided between the chip dropping holes 57, 57, and have a long axis in a direction orthogonal to the longitudinal direction of the roller supporting piece 51. A pair of long holes (not shown) are opposed to each other. Position -17-(15) 1295214 is placed on the roller support piece 51 with the adjusting body 56, and the fixing hole of the position adjusting body 56 is fixed. The bolt 56a is inserted into the long hole of the roller supporting piece 51, and is bolted by a nut (not shown). By loosening the nut, the position adjusting body 56 can be positive in the longitudinal direction of the roller supporting piece 51. The direction of intersection is moved. By tightening the nut after positioning, the position adjusting body 56 is fixed, and the roller 58 is positioned. The roller 58 is arranged on the other rollers 5 5, 5 5 It is closer to the side of the fixing piece ® 5 2. Between the rollers 5 8 and the rollers 5 5 and 5 5 , since the guide rails 43 of the roller supporting portion 40 are disposed, the guide rails 43 can be sandwiched from both ends, thereby preventing It is separated by the guide rail 43 (refer to FIG. 14). Fixing holes 52a for fixing to the outer surface of the second protective sheet 83, which will be described later, of the protective sheet 85 are respectively formed in the vicinity of the both end portions in the longitudinal direction of the fixing piece 52 and the substantially intermediate portion. The shielding piece 53 for preventing the chips from intruding into the inner side of the electrical module 82 is disposed on the left end portion of the roller supporting piece 51 in a manner orthogonal to the surface of the roller supporting piece 5''. The roller supporting piece 5 1 shown in Fig. 11 corresponds to the "third supporting piece", and the rollers 5 5, 5 8 and 5 5 correspond to the "second sliding portion (second roller)". The guide rails 43, and the rollers 5 5, 5 8 and 5 5 which are the "second sliding portions" correspond to the "second guiding means". Explain about the protective sheet 80. As shown in Fig. 12, the protective sheet 80 is extended in the left direction, and the cross section orthogonal to the longitudinal direction is formed so as to protrude toward the rear side of the left door 5 and turn back. <" glyph. The protective sheet 80 is connected to the lower end portion of the left door 5, and is formed in a substantially strip-shaped first protective sheet 82 extending obliquely downward from the back side of the left door 5; and the first protective sheet 8 is provided. The lower end portion of the second end is extended substantially vertically downward, and the second protective sheet 83 having a substantially strip shape in which the fixing piece 42 (see FIG. 7) of the roller supporting portion -18-(16) 1295214 40 is fixed is mainly composed. of. A third protective sheet 84 having a substantially trapezoidal planar viewing angle for blocking the gap is provided between each of the first protective sheet 82 and the second protective sheet 83 on the left side of the left door 5. In the second protective sheet 83, fixing holes 83a are formed in the respective positions of the fixing holes 42a of the fixing pieces 42 of the roller supporting portion 40. The outer surface of the fixing piece 42 of the roller supporting portion 40 abuts against the inner side surface φ of the second protective sheet 83, and the fixing hole 42a and the fixing hole 83a are opposed to each other, and the bolt 25 and the nut 17 are referred to (refer to the figure). 1 4) The fixing piece 42 of the roller supporting portion 40 is fixed to the second protective sheet 83 of the protective sheet 80 (see Fig. 7). The protective sheet 80 shown in Fig. 12 corresponds to the "first protective sheet". Description about the protective sheet 85. As shown in Fig. 13, the protective sheet 85 is extended in the left direction, and the cross section orthogonal to the longitudinal direction is formed so as to protrude toward the rear side of the right door 6 and turn back. <" glyph. The protective sheet 85 is a substantially protective strip-shaped first protective sheet 86 that is connected to the lower end portion of the right door 6 and extends obliquely downward in the direction of the back side of the right door 6; and the first protective sheet The lower end portion of the 86 is formed to extend substantially vertically downward, and the second protective sheet 87 having a substantially strip shape in which the fixing piece 52 (see FIG. 11) of the roller supporting portion 50 is fixed is fixed. In the second protective sheet 87, fixing holes 875a are bored at positions of the fixing holes 52a of the fixing pieces 52 of the roller supporting portion 50, respectively. The outer side surface of the fixing piece 5 2 of the roller supporting portion 50 (refer to FIG. 11 ) abuts against the inner side surface of the second protective sheet 87, and the fixing hole 52 2a and the fixing hole 87a are opposed to each other with the bolt 26 The nut 18 (see Fig. 14) is fixed so that the fixing piece 52 of the roller supporting portion 50 fixes -19-(17) 1295214 to the second protective sheet 87 of the protective sheet 85 (see Fig. 8). The protective sheet 8 5 shown in Fig. 13 corresponds to the "second protective sheet". The connection structure between the main body rail support portion 30 and the roller support portion 40 will be described. As shown in FIG. 14, the guide rail 33 fixed to the main body rail support portion 30 of the first front wall portion 3a is composed of three rollers 45 which are supported by the roller support pieces 41 of the roller support portion 40 on both sides, 48, 45 to clamp. These rollers 45, 48, 45 are rolled on either side of the side faces of the guide rails 33. Therefore, the roller support portion 40 can be sandwiched into the guide rail 33 of the main body rail support portion 30 without being loosely held by the rollers 45, 48, 45 of its own, so that the roller support portion 40 can be along the guide rail 3 3 It does not vibrate or shake, but moves smoothly. The connection structure between the roller support portion 40 and the roller support portion 50 will be described. As shown in Fig. 14, the guide rails 4 of the roller support portion 40 movably held by the guide rails 3 of the main body rail support portion 30 are supported by the roller support portions 50 by the both sides. The three rollers 55 of the roller supporting piece 51 are gripped by the snaps 58, 55. These rollers 55, 58, 55 are rolled on either side of the side faces of the guide rails 43. Therefore, the roller support portion 50 can be sandwiched between the guide rails 4 of the roller support portion 40 without being loosely held by the rollers 55, 58, 55 themselves, so that the roller support portion 50 can be along the guide rail 4 3, will not vibrate or shake, and move smoothly. In the above-described connection structure, as shown in Fig. 14, the guide rail 3 3 of the main body rail support portion 30 is surrounded by the protective sheet 80 and the protective sheet 85. As shown in FIG. 3, in a state where the opening portion 4 is closed by the left door 5 and the right door 6, the guide rail 33 of the main body rail supporting portion 30 is completely protected by the protective sheet 80 and the protective sheet -20-(18) 1295214 8 5 . Covered by land. Thereby, it is possible to prevent the chips scattered by the machining area from adhering to the guide rail 3 3 ' during the operation of the center of the implement, and to smoothly maintain the movement of the left door 5. Referring to Figs. 15 to 1 7, the movement states of the respective rollers regarding the movement of the left door 5 and the right door 6 will be described. As described above, in Fig. 15 to Fig. 7, the inner surface side of the front wall portion 3 is shown. Therefore, for convenience of explanation, the right side in the drawing is referred to as "the left side of the front wall portion 3", and the left side in the figure is "Right side of the front wall portion 3". As shown in Fig. 15, when the opening portion 4 is opened, the left door 5 and the right door 6 are both located on the left side. At this time, the rollers 4 5, 4 8 , and 45 of the roller support portion 40 of the left door 5 are located closer to the rollers 5 5 , 5 8 , and 5 5 of the roller support portion 50 of the right door 6 . Direction side (left side in Figure 15). In this state, most of the left end portion (the left side in Fig. 15) of the guide rail 33 of the main body rail supporting portion 30 is exposed. Further, the rollers 5 5, 5 8 and 5 5 of the roller supporting portion 50 are in contact with the left side surface of the guide rail 43 of the roller supporting portion 40 located on the left side of the splash cover 2. As shown in FIG. 16, when the handle 10 of the right door 6 is grasped (refer to FIG. 1) and moved to the right side (the left side in FIG. 16), the rollers 55, 58 of the roller support portion 50 of the right door 6, The guide rail 43 of the roller support portion 40 that has been rolled by the left door 5 moves to the vicinity of the substantially center of the opening portion 4 when moving to the intermediate position of the guide rail 43. By the above-described chasing, the left door 5 follows the movement of the right door 6, and moves slightly toward the right side. At this time, the rollers 45, 48, 45 of the roller supporting portion 40 of the left door 5 are rolled onto the guide rails 3 of the main body rail supporting portion 30. When the left door 5 is moved to the right side -21 - (19) 1295214, since the guide rail 43 of the roller support portion 40 of the left door 5 also moves, the right door 6 also moves toward the right side and the left door is displaced. Thereby, the right door moved on the guide rail 43 can be made to be approximately half of the moving distance of the actual right door 6. The opening and closing of the right door 6 is promptly performed to reduce the opening and closing, and the opening portion 4 is gradually sealed by the right door 6 and the left door 5 | As shown in Fig. 17, the roller supporting portions 50 2 Φ 58 and 55 of the right door 6 are formed. The roller of the roller support portion 40 of the left door 5 is substantially at the same position, and the abutment portion 4b of the right end of the opening portion 4 of the buffer portion 39' of the right door 6 causes the right door 6 at this time, the protective sheets 80, 85 The body rail branch rail 3 3 is completely covered (refer to Figs. 15, 16). Since the machine center is started to be cut after the opening portion 4 has been cut, the processed chips or coolant will come into contact with the protective sheets 80 and 85, and the chips will be deposited on the guide rails of the main body rail support portion 3 3 3 ® The guide rails 43 of the portion 40 are also extended substantially vertically downward, and the droplets of the chips or the droplets of the coolant are also dropped. The movement of the rollers 45, 48, 45 of the guide rail 33 and the rolling of the guides 5 5, 5 8 and 5 5 can be often performed. As described above, the door device 20 of the present embodiment is the opening 4 of the splash guard 2 in the center of the machine tool, and includes the left door 5 and the right door that can open and close the opening 4 in the door device 20, When the opening portion 4 is closed, the protective sheets 80 and 85 at the lower end portions of the left door 5 and the right door 6 can move the same distance to the right side 5 by the moving distance 6, thereby being labor-intensive. Then close. Roller 5 5, 45, 48, 45, 39 abuts the movement stops. The guidance of the k part 30 is closed. The area is scattered and therefore can be prevented. The roller is supported so that even if the cutting is smooth, the rolling of the roller 4 3 is set to work. Specifically, the device of 6. They are respectively disposed on the guide rails 3 3 of the main body rail supporting portions 30 for guiding the lower sides of the left door -22-(20) 1295214 5 to the left and right. Thereby, it is possible to prevent the chips from being deposited on the guide rails 3 3 . Since the guide rails 43 of the roller supporting portion 40 that guide the lower side of the right door 6 toward the left and right are substantially vertically downward, the cuttings are dropped even if the chips come into contact with the guide rails 43. Therefore, the left door 5 and the right door 6 can be moved smoothly. Since the main body rail support portion 30 is formed to have substantially the same length as the lower end portion of the opening portion 4 (see FIG. 5), when the opening portion 4 is closed by the left door 5 and the right door 6, the main body rail support portion 30 is not opened. The lower end portion of the portion 4 protrudes, and the left door 5 is placed on the body rail support portion 30. Thereby, it is possible to prevent the cutting chips from falling onto the main body rail supporting portion 30. When the left door 5 is moved to the right side, the guide rails 43 of the roller support portion 40 of the left door 5 are also moved to the right side, so that the right door 6 can also simultaneously move to the right side by the amount of movement distance corresponding to the left door 5. Thereby, the moving distance of the right door 6 moved on the guide rail 43 can be made substantially half of the moving distance of the actual right door 6. Therefore, the opening and closing of the right door 6 can be quickly performed, and the labor associated with opening and closing can be reduced. Further, the door device of the present invention can be variously modified. For example, the opening and closing structure of the left door 5 and the right door 6 of the above-described embodiment is constituted by the main body rail supporting portion 30, the roller supporting portion 40, the roller supporting portion 5, and the like, but the configuration is also changed by The installation combination of the track and the roller reaches at least three variants. Next, these three modifications will be described with reference to Figs. 18 and 20 . Fig. 1 is a structural view showing a first modification of the opening and closing structure, Fig. 19 is a structural view showing a second modification of the opening and closing structure, and Fig. 20 is a third modification showing the closed structure of the opening -23-(21) 1295214 The construction diagram of the example. For comparison with the above embodiment, it will be described in comparison with FIG. The first modification will be described with reference to Fig. 18. The opening and closing structure of the first modification includes a main body rail support portion 30 as shown in FIG. 14 and a roller support portion 400 different from the structure of the roller support portion 50 shown in FIG. The roller support portion 50 shown in Fig. 14 has a different roller support portion 500. On the upper surface of the roller supporting piece 41# of the roller supporting portion 400, the same rollers 4 5 and 4 5 as shown in Fig. 10 are respectively supported (only one is shown in Fig. 18), in the roller. On the lower surface of the support piece 41, the rollers 450, 450 (only one is shown in Fig. 18) and 480 are alternately axially supported. The roller 480 is a positionally adjustable roller. Below the roller support piece 4 1 , a guide rail 43 as shown in Fig. 14 is not provided. On the upper surface of the roller supporting piece 51 of the roller supporting portion 500, a guide rail 530 is provided, and rollers 55 and 55 (only one is shown in Fig. 14) and 58 as shown in Fig. 14 are not provided. As described above, in the first modification, all the roller shafts are supported on both surfaces of the roller supporting piece 41 of the roller supporting portion 10000, and the guide roller 5 is provided on the roller supporting piece 51 of the roller supporting portion 500. 0 is its characteristic. A second modification will be described with reference to Fig. 19. The opening and closing structure of the second modification includes a main body rail support portion 300 different from the structure of the main body rail support portion 30 shown in FIG. 14 and a structure different from the roller support portion 40 shown in FIG. The roller support portion 401 and the roller support portion 5000 of the first modification shown in Fig. 18 . Below the rail supporting piece 31 of the main body rail supporting portion 30, the rollers 350, 350 (only one is shown in Fig. 19), 380, which are the same as those of the roller shown in Fig. 10, are alternately supported by the shaft. . -24- (22) 1295214 The guide rail 3 3 shown in Fig. 14 is not provided. Roller 3 80 is a position-adjustable roller. On the upper surface of the roller supporting piece 41 of the roller supporting portion 401, the rollers 45, 45 (only one is shown in Fig. 14) and 48 shown in Fig. 14 are not provided, and the guide rail 430 is provided. On the lower surface of the roller supporting piece 41, the rollers 4 5 0, 4 5 0 (only one is shown in Fig. 19) and 480 are supported alternately in the same manner as the first modification shown in Fig. 18. As described above, in the second modification, each of the guide rails 430 and 530 is provided in each of the roller supporting sheets 4 1 and 5 1 and is characterized in that the projections are vertically formed. A third modification will be described with reference to Fig. 20 . The opening and closing structure of the third modification includes a main body rail support portion 300 shown in FIG. 19, a roller support portion 402 different from the structure of the roller support portion 40 shown in FIG. 14, and FIG. The roller support portion 50 is shown. In the roller supporting piece 41 of the roller supporting portion 402, the rollers 45, 45 (only one is shown in Fig. 14) and 48 shown in Fig. 14 are not provided, and no roller is provided. Instead, a guide rail 43 0 is provided on the upper surface of the roller support piece 41, and a guide rail 43 similar to that shown in Fig. 14 is provided instead of the lower surface of the roller support piece 41. As described above, in the third modification, the guide rail 430 and the guide rail 43 are provided on the upper surface and the lower surface of the roller supporting piece 41 of the roller supporting portion 402 in the upward direction and the downward direction, respectively. According to the above three modifications, the opening and closing structure of the left door 5 and the right door 6 of the above embodiment can be deformed. Further, in addition to the above-described modifications, various modifications can be made to the crucible. For example, the moving form of the left and right doors can also use the conventional rail form. The slide rail is composed of an outer rail, a middle rail, an inner rail and a steel ball, and is slid on the steel ball by the middle rail and the inner rail of the outer rail -25- (23) 1295214, and is pulled out from the outer rail. By. It can be installed on the lower side of these left and rear doors. The protective sheets are respectively attached to the lower ends of the left and right doors to cover the structure of each track. In the present embodiment, the three rollers, 48, and 45 are arranged in a zigzag manner on the roller support portion 40, and the guide rails 3 of the body rail support portion 30 are interposed therebetween. It is also possible to provide a pair of guide rails that are vertically downwardly disposed at both end portions in a direction orthogonal to the longitudinal direction of the sub-support sheet, and to arrange a plurality of rollers arranged in a line in the inner side. Roll the roller over the inner side of the pair of rails. Further, the roller support portion 50 may have the same structure. The door device of the present invention can be applied not only to the working machine described in the above embodiment, but also to a plurality of members having an opening for opening and closing the main body. The present disclosure is related to the contents of the Japanese Patent Application No. 2005 _023 1 557, which is incorporated herein by reference. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of the entire splash guard used in the center of the implement. Figure 2 is a right side view of the splash cover. Fig. 3 is an inside view of the front portion viewed from the A-A line arrow angle view shown in Fig. 2 (the opening portion is closed). Fig. 4 is an inside view of the front portion viewed from the A-A line arrow angle shown in Fig. 2 (the opening portion is semi-closed). Also installed 4 5 The number of the square needles Chen's home wall -26- (24) 1295214 Figure 5 is the inside view of the front wall viewed from the AA line arrow view shown in Figure 2 (the opening is open) ). Fig. 6 is a partially enlarged view showing the vicinity of the third front wall portion shown in Fig. 3; Figure 7 is a perspective view as seen from the front of the left door. Figure 8 is a perspective view as seen from the front of the right door. Figure 9 is a perspective view of the body rail support portion. Figure 1 is a perspective view of the 〇 series roller support. Fig. 1 is a perspective view of a roller support portion. Fig. 1 is a perspective view showing the vicinity of the protective sheet attached to the lower end portion of the left door. Fig. 13 is a perspective view showing the vicinity of the protective sheet attached to the lower end portion of the right door. Fig. 14 is a Β-Β line arrow shown in Fig. 5. A cross-sectional view of the direction. Fig. 15 is an explanatory view showing the movement of the left and right doors viewed from the direction of the Α-Α line arrow shown in Fig. 2 (the opening is in an open state). Fig. 16 is a view showing the Α- shown in Fig. 2 An explanatory diagram of the movement of the left and right doors viewed in the direction of the arrow in the direction of the arrow (the opening is semi-open). Fig. 17 is an operation explanatory view showing a movement state of the left door and the right door viewed from the direction of the Α-Α line arrow shown in Fig. 2 (the opening portion is closed). Fig. 1 shows a first modification of the closed structure. Construction diagram. Fig. 1 is a structural view showing a second modification of the closed structure. -27- (25) (25) 1295214 Fig. 20 is a structural view showing a third modification of the closed structure. [Description of main component symbols] 1 : Machine tool center 2 : Splash prevention cover 3 : Front wall portion 3 a : First front wall portion 3 b : Second front wall portion 3 c : Third front wall portion 4 : Opening portion 4a : Engagement piece 4b: Abutment part 5: Left door 5a: Glass window part 6: Right door 6a: Glass window part 8 = Machine tool mounting part 9: Inspection hatch 1 0: Handle 1 1 : Fixing hole 1 7 , 1 8 : Nut 2 5, 2 6 : Bolt 27 : Engaged piece 28 : Engaged piece -28- (26) (26) 1295214 3 Ο : Main body rail support part 3 1 '· Track support piece 32 : Fixing piece 3 3: guide rail 3 4 : contact plate 3 7 : engaging piece 3 9 : buffer portion 40 : roller support portion 4 1 : roller support piece 42 : fixing piece 42 a : fixing hole 43 : guide rail 4 5 : roller 4 6 : Position adjustment body 4 6 a : Bolt 4 8 : Roller 5 〇: Roller support portion 5 1 : Roller support piece 52 : Fixing piece 52a : Fixing hole 53 : Masking piece 5 5 : Roller 5 6 : Position adjustment Body 5 6 a : Bolt -29- (27) (27) 1295214 57 : Chip dropping hole 5 8 : Roller 60 : Upper rail 61 : Upper roller 62 : Lower roller 71 : Upper roller 7 2 : Lower Roller 80: protective sheet 82: first protective sheet 83: second protective sheet 8 3 a : fixing hole 84: third protective sheet 85: Protective sheet 8 6 : First protective sheet 87 : Second protective sheet 8 7 a : Fixing hole 9 0 : First pulley 90a : Arm 91 : Second pulley 91 a : Arm 9 3 : Metal wire 9 5, 9 6 : Fixed Portion 9 7 : Connection portion 3 5 0 : Roller (28) 1295214 3 8 Ο : Roller 400 : Roller support portion 4 0 1 : Roller support portion 402 : Roller support portion 430 : Guide rail
4 5 0 :滾子 4 8 0 :滾子 500 :滾子支承部 5 3 0 :導軌4 5 0 : Roller 4 8 0 : Roller 500 : Roller support 5 3 0 : Guide rail