201027864 六、發明說明： 【發明所屬之技術領域】 本發明係有關於，將光纖纜線彼此光學連接之機械式 光纜接續盒。 【先前技術】 以往，已知具備殻體與一對之桿與金屬套筒的機械式 0 光纜接續盒（日本登錄實用新案第3121157號公報）。 於殼體形成有一對之光纖纜線插入孔。光纖纜線插入 孔沿著殼體之長邊方向延伸。 桿係分別設在殼體之兩端部。桿具有推壓部。桿係可 在光纖纜線可插入位置與光纖纜線固定位置之間轉動。 金屬套筒係配置於一對之光纖纜線插入孔之間。於金 屬套筒之中央部形成有窗孔。 使用此機械式光纜接續盒之光纖纜線的連接作業係如 . 以下所述。 首先，將兩個光纖纜線之一端部的被覆分別除去，露 出光纖（軸芯與被覆軸芯之包覆層所構成的部分）。 接著，將桿從光纖纜線可插入位置轉動至光纖纜線固 定位置。此時，藉由桿之推壓部使光纖纜線被送往金屬套 筒之方向，並且被推壓至光纖纜線插入孔之內周面而固定 於殻體。 【發明內容】 -5- 201027864 [發明所欲解決的課題] 由於以往之機械式光纜接續盒的金屬套筒加工須具有 高精密度，而成爲機械式光纜接續盒之製造成本高昂的原 因之一。 若採用加工精密度低之金屬套筒，雖可壓低機械式光 纜接續盒之製造成本，但如此一來機械式光纜接續盒之性 能也會降低。 本發明有鑑於上述情況，其課題在於不降低機械式光 纜接續盒之性能而能達成降低成本。 [用以解決課題之手段] 爲解決上述課題，本發明之機械式光纜接續盒，其特 徵爲，具備：設有收容一方之光纖纜線之光纖端部及與此 連接之另一方之光纖纜線之光纖的端部之空間，用以對接 前述兩方之光纖纜線之光纖端部的對接部；用以收容前述 雙方之光纖纜線之光纖與前述對接部的殼體；使收容於前 述殼體之前述對接部之內面與前述光纖之外面密合，維持 前述光纖之端部彼此之對接狀態的對接維持部。 由於藉由對接維持部使對接部之內面與光纖之外面密 合，所以對接部不須使用高精密度之組件。 較佳係其特徵爲，前述對接部係可對前述殼體分離的 分割套筒，前述殼體，係由以下所構成：配置有前述雙方 之光纖纜線的基座；具有支持前述分割套筒的支持部’能 在被鎖定於前述基座之第1鎖定位置與暫時固定於前述基 -6 - 201027864 座之第1暫時固定位置之間沿著前述基座之高度方向移動 地裝設於前述基座中央部的中央蓋；能在被鎖定於前述基 座之第2鎖定位置與暫時固定於前述基座之第2暫時固定 位置之間移動地裝設於前述基座兩端部，在移動至前述第 2鎖定位置時與前述基座共同作用來分別保持前述雙方之 光纖纜線的2個側蓋；前述對接維持部係由以下所構成： 設於前述中央蓋，挾持前述分割套筒之外周面的挾持部； φ 設於前述基座之中央部，當前述中央蓋位於前述第1鎖定 位置時藉由卡合前述挾持部來推壓前述分割套筒之外周面 而縮小前述分割套筒之內徑的卡合部。 較佳係其特徵爲，前述殼體係由以下所構成：配置有 前述雙方之光纖纜線的基座；能在被鎖定於前述基座之第 1鎖定位置與暫時固定於前述基座之第1暫時固定位置之 間沿著前述基座之高度方向移動地裝設於前述基座中央部 的中央蓋；能在被鎖定於前述基座之第2鎖定位置與暫時 Φ 固定於前述基座之第2暫時固定位置之間移動地安裝於前 述基座之兩端部，在移動至前述第2鎖定位置時與前述基 座共同作用來分別保持前述雙方之光纖纜線的2個側蓋； 前述對接部係固定於前述中央蓋，前述對接維持部係由以 下所構成：形成於前述對接部，與前述空間大致平行延伸 的溝；設於前述基座，前述中央蓋在位於前述第1鎖定位 置時藉由嵌合於前述溝’擴張前述溝之溝幅並縮小前述對 接部之空間的突出部。 較佳係其特徵爲’前述殻體係由以下所構成：配置有 201027864 前述雙方之光纖纜線的基座；能在被鎖定於前述基座之第 1鎖定位置與暫時固定於前述基座之第1暫時固定位置之 間沿著前述基座之高度方向移動地裝設於前述基座中央部 的中央蓋；能在被鎖定於前述基座之第2鎖定位置與暫時 固定於前述基座之第2暫時固定位置之間移動地安裝於前 述基座之兩端部’在移動至前述第2鎖定位置時與前述基 座共同作用來分別保持前述雙方之光纖纜線的2個側蓋； 前述對接部係固定於前述中央蓋，前述對接維持部係設於 前述基座，當前述中央蓋位於前述第1鎖定位置時縮小前 述對接部之空間的突出部。 較佳係其特徵爲，前述殼體係由以下所構成：配置有 前述雙方之光纖纜線的基座；能在被鎖定於前述基座之第 1鎖定位置與暫時固定於前述基座之第1暫時固定位置之 間沿著前述基座之高度方向移動地裝設於前述基座中央部 的中央蓋；能在被鎖定於前述基座之第2鎖定位置與暫時 固定於前述基座之第2暫時固定位置之間沿著前述基座之 高度方向移動地裝設於前述基座之兩端部，在移動至前述 第2鎖定位置時與前述基座共同作用來分別保持前述雙方 之光纖纜線的2個側蓋；前述對接部係固定於前述中央蓋 ，前述對接維持部係設於前述基座，前述中央蓋在位於前 述第1鎖定位置時插入前述對接部之空間將前述對接部內 之前述光纖推壓至前述對接部之內面的推壓片。 較佳係其特徵爲，前述基座，係具有前述側蓋從前述 第2暫時固定位置往前述第2鎖定位置移動時，將前述側 201027864 蓋以接近前述中央蓋之方式往斜下方導引的導引 較佳係其特徵爲，前述對接部係以樹脂形成 較佳係其特徵爲，前述對接部與前述中央蓋 一體成形。 較佳係其特徵爲，前述殻體係具有將前述光 對接部所未收容之部分彎曲的光纖收容空間。 Φ [發明之效果] 若使用本發明，可不降低機械式光纜接續盒 能達到降低成本。 【實施方式】 [實施發明之最佳形態] 以下，依據圖式說明本發明之實施形態。 第1圖係本發明之一實施形態之機械式光纜 Φ 體圖。第2圖係表示第1圖所示之機械式光纜接 翻轉狀態之立體圖。第3圖係表示第1圖所示之 纜接續盒正面圖。第4圖係表示拆開第1圖所示 光纜接續盒之側蓋後之狀態的立體圖。第5圖係 圖所示之機械式光纜接續盒之基座與中央蓋之立 機械式光纜接續盒1係將光纖纜線21，21( 圖）彼此連接。如第1圖、第2圖、第3圖所示 光纜接續盒1具備身爲對接部之分割套筒3 (善 圖）與殻體5。 部。 〇 係由樹脂 纖之前述 之性能而 接續盒立 續盒上下 機械式光 之機械式 表示第1 體圖。 參照第1 ，機械式 I照第16 -9 - 201027864 分割套筒3係金屬製，具有空間3a與縫隙3b (參照 第35圖）。分割套筒3係收容將2條光纖纜線21端部之 被覆除去而露出之2條光纖21a(參照第35圖、第36圖 )的端部，並且將2條光纖21a端部彼此對接。縫隙3b 係沿著中心軸延伸。縫隙3b係與空間3a相連。 如第4圖、第5圖所示，殼體5由基座6與中央蓋7 與2個側蓋8構成。 第6圖係第1圖所示之機械式光纜接續盒之基座的俯 視圖。第7圖係第1圖所示之機械式光纜接續盒之基座的 側面圖。第8圖係沿第6圖之VIII— VIII線的剖面圖。第 9圖係沿第6圖之IX - IX線的剖面圖。第1 0圖係沿第6 圖之X—X線的剖面圖。第11圖係沿第6圖之XI — XI線 的剖面圖。第12圖係沿第6圖之XII— XII線的剖面圖。 第13圖係沿第6圖之XIII - XIII線的剖面圖。第14圖係 沿第6圖之XIV — XIV線的剖面圖。 如第6圖、第7圖、第8圖所示，於基座6之中央部 形成有寬幅部601。基座6的中央部形成有凹部602。凹 部6 02沿著基座6的長度方向L延伸，大致呈溝狀。凹部 6 02的中央部深度，係較凹部602之長度方向l的兩端部 深度更深。凹部6 02之長度方向的兩端部係成爲光纖收容 空間602a (參照第6圖、第8圖）。光纖收容空間6 02 a 係使在光纖纜線21之端部所露出之光纖21a之一部分（ 未收容於分割套筒3之部分）彎曲用的空間。於凹部6 02 之中央部底面形成有一對卡合部603 (對接維持部之一部 201027864 分）。卡合部603係具有傾斜面603a(參照第5圖、第9 圖）。 於基座6之中央部的兩側面分別形成有2個第1卡止 突起604。2個第1卡止突起6〇4係以隔著寬幅部601之 方式配置。卡止突起604係具有傾斜面604a與下面604b 〇 於基座6之中央部的兩側面分別形成有2個第2卡止 φ 突起605。2個第2卡止突起605係分別形成於第1卡止 突起604之寬幅部側。第2卡止突起605位於比第1卡止 突起604更下方的位置。第2卡止突起605係具有傾斜面 605a與下面605b ° 於基座6之長度方向L之兩端部分別形成有凹部610 。凹部610係沿著基座6之長度方向L形成，大致呈溝狀 。凹部610與凹部6〇2相連。凹部610的底面形成有突出 片611。突出片611大致呈板狀，沿基座6之長度方向L Q 延伸。突出片611之板厚方向與基座6之寬度方向W平 行。突出片611具有厚片部611a與薄片部611b。厚片部 611a的上面形成有寬幅溝611c，薄片部611b則形成有溝 611d(參照第6圖）。溝611d與寬幅溝611c相連。 於基座6之長度方向L之兩端部之兩側面分別形成有 導引凸部612。從側方觀看導引凸部612時之形狀係大致 呈平行四邊形，導引凸部612具有導引面612a。導引面 612a相對於基座6之高度方向Η爲傾斜（參照第7圖） -11 - 201027864 另外，於基座6之兩端部之兩側面分別形成有2個第 1卡止突起613。2個第1卡止突起613係以隔著導引凸 部612之方式配置。第1卡止突起613係具有傾斜面 613a與下面613b(參照第11圖，第12圖）。 而且，於基座6之兩端部的兩側面分別形成有2個第 2卡止突起614。2個第2卡止突起614係分別鄰接配置 於第1卡止突起613的導引凸部612側。第2卡止突起 614位於比第1卡止突起613更下方的位置。第2卡止突 起614係具有傾斜面614a與下面614b(參照第10圖， 第13圖）。 第15圖係第1圖所示之機械式光纜接續盒之中央蓋 的立體圖。第16圖係表示第1圖所示之機械式光纜接續 盒之分割套筒與上下翻轉後之中央蓋的立體圖。第17圖 係第1圖所示之機械式光纜接續盒之中央蓋的俯視圖。第 18圖係第1圖所示之機械式光纜接續盒之中央蓋的側面 圖。第19圖係第1圖所示之機械式光纜接續盒之中央蓋 的底面圖。第20圖係沿第17圖之XX — XX線的剖面圖。 第21圖係沿第17圖之XXI - XXI線的剖面圖。第22圖 係沿第17圖之XXII- XXII線的剖面圖。第23圖係沿第 17圖所示之XXIII — XXIII線的剖面圖。第24圖係中央 蓋之正面圖。 中央蓋7係具有上面板71與2個側面板72’且以具 有彈性之合性樹脂形成。側面板72可往板厚方向彈性變 形。 -12- 201027864 於上面板71之下面的中央部形成一對之挾持部 卡合板603共同構成對接維持部）73。挾持部73大 板狀，其板厚方向與側面板72之板厚方向平行。又 對之挾持部73可往其板厚方向彈性變形。一對之挾 73之間隔比分割套筒3之外徑小。於挾持部73之前 成有爪73a。 於上面板71之下面的兩端部分別形成有突出片 φ 突出片74朝上面板71之長度方向延伸。突出片74 厚壁部74a與薄壁部74b。厚壁部74a係位於上面ί 之中央部側。 於厚壁部74a形成有凹部（支持部）74c。凹部 係支撐分割套筒3之端部。一對之挾持部73係挾持 持於凹部74c之分割套筒3之外面。 於薄壁部74b形成有溝部74d。於溝部74d配置 纜線2 1之光纖2 1 a。 〇 於兩方側面板72分別形成2個窗孔72a。窗孔 係收容基座6之第1、第2卡止突起6 04,605。於兩 側面板72之下端形成傾斜面72b。 第25圖係第1圖所示之機械式光纜接續盒之側 立體圖。第26圖係表示將第1圖所示之機械式光纜 盒之側蓋上下翻轉後狀態的立體圖。第27圖係第1 示之機械式光纜接續盒之側蓋的俯視圖。第28圖係 圖所示之機械式光纜接續盒之側蓋的側面圖。第29 第1圖所示之機械式光纜接續盒之側蓋的底面圖。負 (與 致呈 5--- 持部 端形 74 〇 具有 S 71 74c 被保 光纖 72a 方之 蓋的 接續 圖所 第1 圖係 I 30 -13- 201027864 圖係沿第27圖之XXX — XXX線的剖面圖。第3 1圖係沿 第27圖之XXXI- XXXI線的剖面圖。第32圖係沿第27 圖之XXXII — XXXII線的剖面圖。第33圖係沿第27圖所 示之XXXIII — XXXIII線的剖面圖。第34圖係側蓋之正 面圖。 側蓋8係具有上面板81與2個側面板8 2，以具有彈 性之合成樹脂形成。側面板82係可往其板厚方向彈性變 形。 ❹ 於上面板81之下面形成突出片84。突出片84係往 上面板81之長度方向延伸。於突出片84形成有寬幅溝 84a與溝84b。寬幅溝84a係位於突出片84之一端側。溝 84b係位於突出片84之另一端側，與寬幅溝84a相連。 於寬幅溝84a收容有光纖纜線21。於溝84b收容有切除 光纖纜線21之被覆而露出之光纖21a。而且，於溝84b 插入有基座6之突出片611 (參照第6圖）之薄壁部611b ，於寬幅溝8 4b插入有基座6之突出片611之厚壁部 Q 6 1 1 a ° 兩方之側面板82之中央部內面形成有凹部82a °凹 部82a具有卡合面82b。卡合面82b係相對於側蓋8之高 度方向呈傾斜。凹部82a係收容基座6之導引凸部612 ( 參照第5圖）。卡合面82b卡合於導引凸部612之導引面 6 12a。 又，於兩方之側面板82分別形成有2個窗孔82e。 窗孔82e係大致呈平行四邊形。窗孔82e係收容基座ό之 -14- 201027864 第1卡止突起613與第2卡止突起614(參照第5圖）。 於兩方之側面板82之下端分別形成有傾斜面82f。 接著，說明有關此機械式光纜接續盒之組裝。 首先，如第16圖所示，從上下翻轉之中央蓋7之上 方將分割套筒3插入挾持部73之間，並且將分割套筒3 之兩端部嵌入中央蓋7之凹部74c。其結果，分割套筒3 之外周面經由挾持部73挾持，並且挾持部73之爪73a勾 φ 住分割套筒3之外周面，分割套筒3被保持於中央蓋7。 接著，如第5圖所示，從基座6之中央部上方放下中 央蓋7，使鄰接於中央蓋7的窗孔72a之下緣的部分，配 置於基座6之第1卡止突起613之下面613b與第2卡止 突起614之傾斜面614a之間。此結果，中央蓋7從基座 6呈浮起狀態被暫時固定，不會從基座6脫落。 之後，從基座6之端部上方蓋上側蓋8，使鄰接於側 蓋8的窗孔8 4e之下緣的部分，配置於基座6之第1卡止 ❷ 突起613之下面613b與第2卡止突起614傾斜面614a之 間。此結果，側蓋8從基座6呈浮起狀態被鎖定，不會從 基座6脫落。 藉由以上作業，完成機械式光纜接續盒之組裝。 接著，說明有關中央蓋7之動作。 中央蓋7係可沿著基座6之高度方向Η，在後述之第 1暫時固定位置（參照第35圖）與第1鎖定位置（參照 第3 6圖）之間移動。 鄰接於中央蓋7窗孔72 a之下緣的部分被第1卡止突 -15- 201027864 起613之下面613b與第2卡止突起614之傾斜面614a挾 持，中央蓋7被暫時固定於基座6時之中央蓋7之位置爲 第1暫時固定位置。在第1暫時固定位置可將光纖21a拔 插於分割套筒3。 將位於第1暫時固定位置之中央蓋7押下時，鄰接於 中央蓋7的窗孔72a下緣的部分卡合於第2卡止突起614 之下面614b，中央蓋7被鎖定於基座6。此時中央蓋7的 位置位於第1鎖定位置。在第1鎖定位置，分割套筒3之 內面緊靠著光纖21a的外面，維持光纖21a之端面彼此的 對接狀態。 接著，對側蓋8之動作進行說明。 側蓋8可沿著與基座6之導引凸部612之導引面 612a平行方向（將側蓋8靠近中央蓋7之斜下方），在 後述第2暫時固定位置與第2鎖定位置之間移動。 鄰接被側蓋8之窗孔82e下緣部分第1卡止突起613 之下面613b與第2卡止突起614之傾斜面614a所挾持， 側蓋8暫時固定於基座6時之側蓋8的位置爲第2暫時固 定位置。在第2暫時固定位置處基座6之突出片611之寬 幅溝61 lc隔著間隔相對向於側蓋8之寬幅溝84a，突出 片611之溝611d隔著間隔相對向於側蓋8之溝84d。此 時可將光纖纜線21 (被覆著的部分）拔插於寬幅溝611c 、84a間，可將光纖21a (光纖纜線21之被覆被除去的部 分）拔插於溝61 Id、84b間拔插。 將位於第2暫時固定位置之側蓋8押下時，側蓋8之 -16- 201027864 凹部82a的卡合面8 2b藉由基座6之導引凸部612之導引 面6 12a導引，側蓋8沿導引面612a朝斜下方移動，鄰接 於側蓋8的窗孔8 2e下緣部分卡合於第2卡止突起614之 下面614b»此時之側蓋8的位置爲第2鎖定位置。 側蓋8由第2暫時固定位置朝第2鎖定位置移動時， 側蓋8之寬幅溝84a及溝84b朝分割套筒3側接近。此時 ，寬幅溝84a之內面將光纖纜線2 1送往分割套筒3側， φ 溝84b之內面將光纖21a送往分割套筒3側。同時，寬幅 溝8 4a之內面將光纖纜線21推壓至基座6之寬幅溝611c 之內面，溝84b之內面將光纖21a推壓至基座6之溝 611d，此結果，光纖21a之端面彼此以較強力道對接，位 於分割套筒3之外面的光纖21a在基座6之收容空間 6 02a內撓曲，光纖纜線21藉由側蓋8與基座6挾持。 第35圖係表示第1圖所示之機械式光纜接續盒之基 座與中央蓋呈分離狀態之剖面的槪念圖。第36圖係表示 φ 第1圖所示之機械式光纜接續盒之基座與中央蓋呈嵌合狀 態之剖面的槪念圖。 接下來，說明以機械式光纜接續盒1所進行之光纖纜 線2 1之連接作業。 首先將中央蓋7置於第1暫時固定位置，側蓋8置於 第2暫時固定位置。 在此狀態，將2條光纖纜線21之光纖21 a分別插入 分割套筒3，將光纖2 1 a之端面彼此對接。 接著，將光纖纜線21配置於基座6之突出片611之 -17- 201027864 寬幅溝611c，將光纖21a配置於突出片611之溝6ld。 之後，將一方之側蓋8往下方推壓使其往第2鎖定位 置移動。 接著，將另一方之側蓋8往下方推壓使其往第2鎖定 位置移動。 此結果如上述般，光纖21a之端面彼此被較強力道對 接，位於分割套筒3之外的光纖21a基座6之收容空間 6 02a內彎曲，光纖纜線21藉由側蓋8與基座6挾持。 然後，如第35圖、第36圖所示般，將中央蓋7從第 1暫時固定位置壓入第2鎖定位置。此結果，中央蓋7之 挾持部73與基座6之卡合部603卡合而被推壓，持挾部 73推壓分割套筒3之外周面而縮小分割套筒3之徑。分 割套筒3之徑縮小時，分割套筒3之內面3a與光纖21a 之外面間的空隙將會消失，光纖21a之端面彼此被正確地 對接，維持其狀態。 依據第1實施形態，由於對接部採用不要求高加工精 密度之分割套筒3，可降低製造成本。 此外，由於可以藉卡合部603與挾持部73將分割套 筒3之徑縮小，可和以往之機械式光纜接續盒同樣地將光 纖之端面彼此正確對接，且可抑制機械式光纜接續盒之性 能降低。 又，由於2條光纖21a之對接部分與分割套筒3密合 ’並且光纖纜線21被固定於殼體5之兩端部，光纖纜線 21被施加較強力道也不易脫落，而且，即使施加振動2 -18- 201027864 條光纖21a之對接部分也不易鬆開，連接之可靠性高。 並且，由於在基座6之收容空間602a使光纖21a彎 曲，可以吸收溫度變化時之殼體5與光纖21a之熱膨脹的 差。 如以上般，第1實施形態之機械式光纜接續盒，光纖 纜線21被施加較強拉力也不易脫落，而且，即使施加振 動2條光纖21a之對接部分也不易鬆開，並且，由於可 φ 以吸收溫度變化造成之殼體5與光纖21a之熱膨脹的差， 適合作爲汽車用之機械式光纜接續盒。 第37圖係本發明之第2實施形態之機械式光纜接續 盒之中央蓋呈上下翻轉狀態的立體圖。第38圖係第37圖 所示之中央蓋的立體圖。第39圖係本發明之第2實施形 態之機械式光纜接續盒之基座的剖面圖。第40圖係沿第 3 9圖之IVX — IVX線的剖面圖。第4 1圖係表示本發明之 第2實施形態之機械式光纜接續盒之基座與中央蓋呈分離 φ 狀態之剖面的槪念圖。第42圖係表示本發明之第2實施 形態之機械式光纜接續盒之基座與中央蓋呈嵌合狀態之剖 面的槪念圖。 對於與第1實施形態共通部分賦予相同符號省略其說 明。以下僅就與第1實施形態主要相異部分做說明。 第1實施形態之機械式光纜接續盒的對接部係金屬製 之分割套筒3，雖與中央蓋7不同個體，但可如第37圖 、第38圖所示，第2實施形態之機械式光纜接續盒的對 接部203係樹脂製’與中央蓋207之上面板271 —體成形 -19- 201027864 對接部203係具有對接部本體203h與中心孔203a與 縫隙203b及溝（對接維持部的一部分）203 c。 中心孔203 e約略形成於角柱狀之對接部本體203h之 中心部。縫隙203b係沿對接部本體203h之長度方向延伸 ，與中心孔2 0 3 a相連。溝2 0 3 c係與縫隙2 0 3 b平行形成 於對接部本體203h下面。 如第39圖、第40圖所示般，於機械式光纜接續盒之 基座206之寬幅部601的凹部602處設有2個楔（突出部 )2603與基座206 —體形成。楔（與溝203c —起構成對 接維持部）2603係插入對接維持部203之溝203c。 接著，對第2實施形態之機械式光纜接續盒之基本動 作進行說明。 首先，將中央蓋207從第41圖所示狀態往下方移動 。其結果，如第42圖所示般，基座206之楔2 603插入中 央蓋207之溝203c。楔2603插入對接部203之溝203c， 溝2 03 c之溝幅變寬時，縫隙203b之寬度變窄並且中心孔 203a之內徑變小，對接部203之中心孔203a之內面密合 於光纖2 1 a，光纖2 1 a彼此正確地以對接狀態被保持於對 接部203。 若依據第2實施形態，可發揮與第1實施形態同樣的 作用效果，並且由於對接部203與中央蓋207以樹脂一體 成形，可以更加降低機械式光纜接續盒之製造成本。 第43圖係表示本發明之第3實施形態之機械式光纜 -20- 201027864 接續盒之中央蓋呈上下翻轉狀態的立體圖。第44圖係本 發明之第3實施形態之機械式光纜接續盒之基座的剖面圖 。第45圖係沿第44圖之IVXV — IVXV線的剖面圖。第 46圖係表示本發明之第3實施形態之機械式光纜接續盒 之基座與中央蓋呈分離狀態之剖面的槪念圖。第47圖係 表示本發明之第3實施形態之機械式光纜接續盒之基座與 中央蓋呈嵌合狀態之剖面的槪念圖。 φ 對於與第1實施形態共通部分賦予相同符號省略其說 明。以下僅就與第1實施形態主要相異部分做說明。 如第43圖所示第3實施形態之機械式光纜接續盒的 對接部3 03係樹脂製，與中央蓋3 07之上面板371 —體形 成。 對接部303係具有對接部本體3 03h與中心孔3 03a與 縫隙303b。對接部303之剖面形狀大致呈U字形。 中心孔3 03 a係形成於角柱狀之對接部本體3 03h之中 • 心部。中心孔3〇3a沿對接部本體3 03h之長度方向延伸， 與縫隙3 03b相連。縫隙3 03b係形成於對接部本體3 03h 下面，沿對接部本體3 03h之長度方向延伸，與中心孔 3 0 3 a相連。 如第44圖、第45圖所示，於機械式光纜接續盒之基 座3 06之寬幅部601之凹部602處推壓片3 603與基座 3 06 —體形成。推壓片3 603係插入對接部3 03之縫隙 3 03b > 接著’針對第3實施形態之機械式光纜接續盒之基本 -21 - 201027864 動作做說明。 將中央蓋3 07，從第46圖所示狀態往下移動。其結 果，如第47圖所示，基座306之推壓片3603插入中央蓋 307之縫隙303b。推壓片3603插入對接部3 03之縫隙 303b時，中心孔303a內之光纖21a藉由推壓片3603被 推壓至中心孔303 a之內面。因此，光纖2〗a彼此被正確 地對接，並且光纖21a藉由中心孔303a之內周面與推壓 片3 603被確實保持。 若依據第3實施形態，可發揮與第2實施形態同樣的 作用效果。 第48圖係表示本發明之第4實施形態之機械式光纜 接續盒之基座與中央蓋呈分離狀態之剖面的槪念圖。第 49圖係表示本發明之第4實施形態之機械式光纜接續盒 之基座與中央蓋呈嵌合狀態之剖面的槪念圖。 如第48圖、第49圖所示，第4實施形態之機械式光 纜接續盒的對接部403係與第2實施形態同樣爲樹脂製， 且與中央蓋407之上面板471 —體形成。 對接部403係具有對接部本體403h與中心孔403 a與 縫隙4 0 3 b。 中心孔403 a係形成於大致呈角柱狀之對接部本體 403h之中心部。中心孔403a係沿對接部本體4〇3h之長 度方向延伸，與縫隙403b相連。縫隙403b係形成於對接 部本體403h下面，沿對接部本體403h之長度方向延伸， 與中心孔403 a相連。 -22- 201027864 於機械式光纜接續盒之基座406處構成對接維持部的 2個楔（突出部）4603與基座406 —體形成。模4603係 卡合於對接部403側面。 接著’針對第4實施形態之機械式光纜接續盒之基本 動作做說明。 將中央蓋407從第48圖所示狀態往下移動。其結果 ，如第49圖所示，基座406之楔4603推壓對接部403側 φ 面。楔46 03推壓對接部403側面時，縫隙403b之寬度變 窄並且中心孔403a之內徑變小，使對接部403之內面密 合於光纖21a，在光纖21a彼此正確對接狀態保持於對接 部 403。 若依據第4實施形態，可發揮與第2實施形態同樣的 作用效果。 又，對接維持部不限於第1、2、4實施形態，例如， 也可以將具有凸輪面之旋轉桿作爲對接維持部可旋轉地設 φ 於基座，令此旋轉桿旋轉，藉由凸輪面使對接部之內面與 光纖之外面密合的方式直接或間接地推壓對接部。 又，也可以使對接維持部與殻體分開形成，使用可拔 插於殻體的楔，藉由插入於殼體之楔使對接部之內面與光 纖之外面密合的方式直接或間接地推壓對接部。 另外，於前述之實施形態係將殼體以基座、中央蓋、 及側蓋構成，但殼體之構成不限於此，例如’將殼體以基 座與覆蓋此基座上面的1個蓋子構成亦可。 於第1實施形態，將中央蓋7構成爲可在第1暫時固 -23- 201027864 定位置與第1鎖定位置之間移動，且將側蓋8構成爲可在 第2暫時固定位置與第2鎖定位置之間移動，但不一定須 要採用如此之構成。 此外，於第1實施形態，側蓋8從第2暫時固定位置 往第2鎖定位置移動時，將側蓋8藉由基座6之導引凸部 612送往分割套筒3側，但不一定須要採用如此之構成， 也可以設爲使側蓋8與基座6之高度方向Η平行地移動 。此時，首先於光纖纜線之連接作業之際，使其中一方之 _ 側蓋從第2暫時固定位置往第2鎖定位置移動，接著，將 另一方之光纖纜線往對接部側壓入，使從對接部露出之光 纖彎曲後，另一方之側蓋從從第2暫時固定位置往第2鎖 定位置移動即可。 【圖式簡單說明】 第1圖係本發明之一實施形態之機械式光纜接續盒立 體圖。 ❹ 第2圖係第1圖所表示之機械式光纜接續盒上下翻轉 狀態之立體圖。 第3圖係第1圖所表示之機械式光纜接續盒正面圖。 第4圖係表示拆開第1圖所示之機械式光纜接續盒之 側蓋後的立體圖。 第5圖係表示第1圖所示之機械式光纜接續盒之基座 與中央蓋之立體圖。 第6圖係第1圖所示之機械式光纜接續盒之基座的俯 -24- 201027864 視圖。 第7圖係第1圖所示之機械式光纜接續盒之基座的側 面圖。 第8圖係沿第6圖之VIII — VIII線的剖面圖。 第9圖係沿第6圖之IX _ IX線的剖面圖。 第1 0圖係沿第6圖之X — X線的剖面圖。 第1 1圖係沿第6圖之XI - XI線的剖面圖。 Ο 第12圖係沿第6圖之XII — XII線的剖面圖。 第13圖係沿第6圖之XIII— XIII線的剖面圖。 第1 4圖係沿第6圖之XIV - XIV線的剖面圖。 第15圖係第1圖所示之機械式光纜接續盒之中央蓋 的立體圖。 第16圖係表示第1圖所示之機械式光纜接續盒之分 割套筒與上下翻轉後之中央蓋的立體圖。 苐17圖係第1圖所示之機械式光纜接續盒之中央蓋 φ 的俯視圖。 第18圖係第1圖所示之機械式光纜接續盒之中央蓋 的側面圖。 第19圖係第1圖所示之機械式光纜接續盒之中央蓋 的底面圖。 第2 0圖係沿第1 7圖之XX _ XX線的剖面圖。 第2 1圖係沿第1 7圖之XXI - XXI線的剖面圖。 第22圖係沿第17圖之XXII— XXII線的剖面圖。 第23圖係沿第17圖所示之XXIII — XXIII線的剖面 -25- 201027864 圖。 第24圖係中央蓋之正面圖。 第25圖係第1圖所示之機械式光纜接續盒之側蓋的 立體圖。 第26圖係將第1圖所示之機械式光纜接續盒之側蓋 上下翻轉後狀態的立體圖。 第27圖係第1圖所示之機械式光纜接續盒之側蓋的 俯視圖。 第28圖係第1圖所示之機械式光纜接續盒之側蓋的 側面圖。 第29圖係第1圖所示之機械式光纜接續盒之側蓋的 底面圖。 第30圖係沿第27圖之XXX — XXX線的剖面圖。 第31圖係沿第27圖之XXXI — XXXI線的剖面圖。 第32圖係沿第27圖之XXXII— XXXII線的剖面圖。 第33圖係沿第27圖所示之XXXIII— XXXIII線的剖 面圖。 第34圖係側蓋之正面圖。 第35圖係表示第1圖所示之機械式光纜接續盒之基 座與中央蓋呈分離狀態之剖面的槪念圖。 第36圖係表示第1圖所示之機械式光纜接續盒之基 座與中央蓋呈嵌合狀態之剖面的槪念圖。 第37圖係表示本發明之第2實施形態之機械式光纜 接續盒之中央蓋呈上下翻轉狀態的立體圖。 -26- 201027864 第38圖係第37圖所示之中央蓋的立體圖。 第39圖係本發明之第2實施形態之機械式光纜接續 盒之基座的剖面圖。 第40圖係沿第39圖之IVX- IVX線的剖面圖。 第41圖係表示本發明之第2實施形態之機械式光纜 接續盒之基座與中央蓋呈分離狀態之剖面的槪念圖。 第42圖係表示本發明之第2實施形態之機械式光纜 φ 接續盒之基座與中央蓋呈嵌合狀態之剖面的槪念圖。 第43圖係表示本發明之第3實施形態之機械式光纜 接續盒之中央蓋呈上下翻轉狀態的立體圖。 第44圖係本發明之第3實施形態之機械式光纜接續 盒之基座的剖面圖。 第45圖係沿第44圖之IVXV — IVXV線的剖面圖。 第46圖係表示本發明之第3實施形態之機械式光纜 接續盒之基座與中央蓋呈分離狀態之剖面的槪念圖。 φ 第47圖係表示本發明之第3實施形態之機械式光纜 接續盒之基座與中央蓋呈嵌合狀態之剖面的槪念圖。 第48圖係表示本發明之第4實施形態之機械式光纜 接續盒之基座與中央蓋呈分離狀態之剖面的槪念圖。 第49圖係表示本發明之第4實施形態之機械式光纜 接續盒之基座與中央蓋呈嵌合狀態之剖面的槪念圖。 【主要元件符號說明】 1:機械式光纜接續盒 -27- 201027864 2 1 :光纖纜線 2 1 a :光纖 2 0 3,3 03,403 ：對接部 203 a,3 03 a,403a ：中心孔 203b,303b,403 :縫隙 203c :溝201027864 VI. Description of the Invention: [Technical Field] The present invention relates to a mechanical optical cable junction box in which optical fiber cables are optically connected to each other. [Prior Art] A mechanical type 0 optical cable connection box including a housing and a pair of rods and a metal sleeve is known (Japanese Laid-Open Utility Model No. 3121157). A pair of optical fiber cable insertion holes are formed in the housing. The fiber optic cable insertion hole extends along the long side of the housing. The rods are respectively disposed at both ends of the housing. The rod has a pressing portion. The lever is rotatable between a fiber optic cable insertable position and a fiber optic cable fixed position. The metal sleeve is disposed between a pair of optical fiber cable insertion holes. A window hole is formed in a central portion of the metal sleeve. The connection of the fiber optic cable using this mechanical fiber optic cable connection box is as follows. As described below. First of all, Removing the ends of one of the two fiber optic cables, respectively, The optical fiber (the portion of the core and the cladding of the coated core) is exposed. then, Rotate the rod from the fiber-optic cable insertable position to the fiber-optic cable retention position. at this time, The fiber optic cable is sent to the direction of the metal sleeve by the pushing portion of the rod, And it is pushed to the inner peripheral surface of the optical fiber cable insertion hole and fixed to the casing. SUMMARY OF THE INVENTION -5- 201027864 [Problems to be Solved by the Invention] Since the metal sleeve processing of the conventional mechanical cable connection box has to be high-precision, It is one of the reasons for the high manufacturing cost of the mechanical optical cable connection box. If a metal sleeve with low precision is used, Although it can reduce the manufacturing cost of the mechanical cable connection box, However, the performance of the mechanical cable connection box will also be reduced. The present invention is in view of the above circumstances, The problem is to achieve cost reduction without reducing the performance of the mechanical cable connection box. [Means for Solving the Problem] To solve the above problems, The mechanical optical cable connection box of the invention, Its characteristics are, have: Providing a space for the end of the fiber end of the fiber optic cable of the other party and the end of the fiber optic cable connecting the other end of the fiber optic cable. An abutting portion for connecting the ends of the optical fibers of the two adjacent optical fibers; a housing for accommodating the optical fibers of the two optical fibers and the abutting portion; Adhering the inner surface of the mating portion received in the casing to the outer surface of the optical fiber, A docking maintaining portion that maintains the end portions of the optical fibers in abutment with each other. Since the inner surface of the abutting portion is brought into close contact with the outer surface of the optical fiber by the docking maintaining portion, Therefore, the docking section does not need to use high-precision components. Preferably, it is characterized by The abutting portion is a split sleeve that can separate the aforementioned housing, The aforementioned housing, It consists of the following: a pedestal configured with the aforementioned two optical fiber cables; The support portion ′ having the split sleeve is supported between the first lock position locked to the base and the first temporary fixed position temporarily fixed to the base -6 - 201027864 seat along the height direction of the base a central cover that is movably mounted at a central portion of the base; The second base locking position locked to the base and the second temporary fixing position temporarily fixed to the base are movably mounted on both ends of the base. And moving to the second locking position to cooperate with the pedestal to respectively hold the two side covers of the two optical fiber cables; The docking maintenance unit is composed of the following: Located in the aforementioned central cover, Holding the gripping portion of the outer peripheral surface of the split sleeve; φ is disposed at the central portion of the pedestal, When the center cover is located at the first lock position, the engagement portion of the split sleeve is pressed by the grip portion to press the engagement portion of the inner diameter of the split sleeve. Preferably, it is characterized by The aforementioned housing is composed of the following: a base configured with the aforementioned two optical fiber cables; a central cover that is mounted on the central portion of the base in a height direction of the base between a first locking position that is locked to the base and a first temporary fixed position that is temporarily fixed to the base; The second base locking position locked to the base and the second temporary fixing position fixed to the base by the temporary Φ are movably attached to both end portions of the base. Cooperating with the base when moving to the second locking position to respectively hold the two side covers of the two optical fiber cables; The abutting portion is fixed to the central cover, The aforementioned docking maintenance unit is composed of the following: Formed in the aforementioned docking portion, a groove extending substantially parallel to the aforementioned space; Located on the aforementioned pedestal, The center cover is formed in the first locking position to expand the groove of the groove by fitting into the groove, and to reduce the space of the abutting portion. Preferably, the housing is constructed as follows: a base equipped with the aforementioned fiber optic cables of both 201027864; a central cover that is mounted on the central portion of the base in a height direction of the base between a first locking position that is locked to the base and a first temporary fixed position that is temporarily fixed to the base; The second end portion of the base that is movably locked between the second locking position locked to the base and the second temporary fixing position temporarily fixed to the base can be moved to the second locking position The pedestals cooperate to respectively hold the two side covers of the two optical fiber cables; The abutting portion is fixed to the central cover, The docking maintaining portion is provided on the base. When the center cover is located at the first locking position, the protruding portion of the space of the abutting portion is reduced. Preferably, it is characterized by The aforementioned housing is composed of the following: a base configured with the aforementioned two optical fiber cables; a central cover that is mounted on the central portion of the base in a height direction of the base between a first locking position that is locked to the base and a first temporary fixed position that is temporarily fixed to the base; The second locking position locked to the base and the second temporary fixing position temporarily fixed to the base are mounted on both ends of the base in a height direction of the base. And moving to the second locking position to cooperate with the pedestal to respectively hold the two side covers of the two optical fiber cables; The abutting portion is fixed to the central cover, The docking maintaining portion is disposed on the base, The central cover is inserted into the space of the abutting portion when the central cover is inserted at the first locking position, and the optical fiber in the abutting portion is pressed against the pressing piece on the inner surface of the abutting portion. Preferably, it is characterized by The aforementioned pedestal, When the side cover is moved from the second temporary fixing position to the second locking position, Preferably, the guiding of the front side 201027864 cover obliquely downwards in a manner close to the central cover is characterized in that Preferably, the abutting portion is formed of a resin, and is characterized in that The abutting portion is integrally formed with the center cover. Preferably, it is characterized by The casing has an optical fiber accommodating space for bending a portion of the optical abutting portion that is not accommodated. Φ [Effects of the Invention] If the present invention is used, The cost reduction can be achieved without reducing the mechanical cable connection box. [Embodiment] [Best Mode for Carrying Out the Invention] Hereinafter, Embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view of a mechanical optical cable Φ according to an embodiment of the present invention. Fig. 2 is a perspective view showing the state in which the mechanical optical cable shown in Fig. 1 is turned over. Fig. 3 is a front view showing the cable splicing box shown in Fig. 1. Fig. 4 is a perspective view showing a state in which the side cover of the optical cable connecting case shown in Fig. 1 is removed. Figure 5 is a diagram showing the base of the mechanical cable connection box and the center cover. The mechanical cable connection box 1 is a fiber optic cable 21, 21 (picture) are connected to each other. As shown in Figure 1, Figure 2, As shown in Fig. 3, the optical cable junction cassette 1 is provided with a split sleeve 3 (good drawing) and a casing 5 which are abutting portions. unit. 〇 The above-mentioned properties of the resin fiber are connected to the box. The mechanical mode of the mechanical light is shown in the first figure. Referring to the first, Mechanical I Photo No. 16 -9 - 201027864 Split sleeve 3 series metal, There is a space 3a and a slit 3b (refer to Fig. 35). The split sleeve 3 accommodates two optical fibers 21a that are exposed by removing the ends of the two optical fiber cables 21 (see FIG. 35, Figure 36, the end, And the ends of the two optical fibers 21a are butted against each other. The slit 3b extends along the central axis. The slit 3b is connected to the space 3a. As shown in Figure 4, Figure 5, The housing 5 is composed of a base 6 and a central cover 7 and two side covers 8. Figure 6 is a top plan view of the base of the mechanical cable splice closure shown in Figure 1. Figure 7 is a side elevational view of the base of the mechanical cable splice closure shown in Figure 1. Figure 8 is a cross-sectional view taken along line VIII-VIII of Figure 6. Fig. 9 is a cross-sectional view taken along line IX-IX of Fig. 6. Figure 10 is a cross-sectional view taken along line X-X of Figure 6. Figure 11 is a cross-sectional view taken along line XI-XI of Figure 6. Figure 12 is a cross-sectional view taken along line XII-XII of Figure 6. Figure 13 is a cross-sectional view taken along line XIII - XIII of Figure 6. Figure 14 is a cross-sectional view taken along line XIV - XIV of Figure 6. As shown in Figure 6, Figure 7, As shown in Figure 8, A wide portion 601 is formed at a central portion of the base 6. A recess 602 is formed in a central portion of the base 6. The recess 062 extends along the length direction L of the base 6, It is roughly grooved. The depth of the central portion of the recess 6 02, Both ends of the longitudinal direction l of the concave portion 602 are deeper in depth. Both ends of the recessed portion 612 in the longitudinal direction are the optical fiber accommodating space 602a (see Fig. 6, Figure 8). The optical fiber accommodating space 610 a is a space for bending one portion of the optical fiber 21a exposed at the end portion of the optical fiber cable 21 (the portion not accommodated in the split sleeve 3). A pair of engaging portions 603 (one of the docking maintaining portions 201027864) is formed on the bottom surface of the central portion of the recessed portion 602. The engaging portion 603 has an inclined surface 603a (see FIG. 5, Figure 9). Two first locking projections 604 are formed on both side surfaces of the central portion of the base 6, respectively. The two first locking projections 6〇4 are disposed to sandwich the wide portion 601. The locking projection 604 has two second locking φ projections 605 formed on the side surfaces of the inclined surface 604a and the lower surface 604b, respectively, at the central portion of the base 6. The two second locking projections 605 are formed on the wide portion side of the first locking projection 604, respectively. The second locking projection 605 is located below the first locking projection 604. The second locking projection 605 has a concave portion 610 formed at each of both end portions of the inclined surface 605a and the lower surface 605b in the longitudinal direction L of the base 6. The recess 610 is formed along the length direction L of the susceptor 6, It is roughly grooved. The recess 610 is connected to the recess 6〇2. The bottom surface of the recess 610 is formed with a protruding piece 611. The protruding piece 611 is substantially plate-shaped. Extending along the length direction L Q of the susceptor 6. The plate thickness direction of the protruding piece 611 is parallel to the width direction W of the base 6. The protruding piece 611 has a thick piece portion 611a and a sheet portion 611b. A wide groove 611c is formed on the upper surface of the slab portion 611a. The sheet portion 611b is formed with a groove 611d (see Fig. 6). The groove 611d is connected to the wide groove 611c. Guide convex portions 612 are formed on both side surfaces of both end portions in the longitudinal direction L of the susceptor 6. The shape of the guiding protrusion 612 when viewed from the side is substantially a parallelogram. The guiding protrusion 612 has a guiding surface 612a. The guide surface 612a is inclined with respect to the height direction of the base 6 (refer to Fig. 7) -11 - 201027864 Two first locking projections 613 are formed on both side surfaces of both end portions of the base 6. The two first locking projections 613 are disposed to sandwich the guide projections 612. The first locking projection 613 has an inclined surface 613a and a lower surface 613b (refer to Fig. 11, Figure 12). and, Two second locking projections 614 are formed on both side surfaces of both end portions of the base 6. The two second locking projections 614 are respectively disposed adjacent to the guide convex portion 612 side of the first locking projection 613. The second locking projection 614 is located below the first locking projection 613. The second locking projection 614 has an inclined surface 614a and a lower surface 614b (refer to Fig. 10, Figure 13). Figure 15 is a perspective view of the central cover of the mechanical cable connector shown in Figure 1. Fig. 16 is a perspective view showing the split sleeve of the mechanical optical cable splicing box shown in Fig. 1 and the center cover which is turned upside down. Figure 17 is a plan view of the central cover of the mechanical cable connector shown in Figure 1. Figure 18 is a side elevational view of the central cover of the mechanical cable splice closure shown in Figure 1. Figure 19 is a bottom plan view of the central cover of the mechanical cable connector shown in Figure 1. Figure 20 is a cross-sectional view taken along line XX-XX of Figure 17. Figure 21 is a cross-sectional view taken along line XXI-XXI of Figure 17. Figure 22 is a cross-sectional view taken along line XXII-XXII of Figure 17. Figure 23 is a cross-sectional view taken along line XXIII - XXIII shown in Figure 17. Figure 24 is a front view of the central cover. The center cover 7 has an upper panel 71 and two side panels 72' and is formed of a resilient resin. The side panel 72 is elastically deformable in the thickness direction. -12- 201027864 A pair of grip portions are formed in a central portion of the lower surface of the upper panel 71. The engagement plates 603 collectively constitute a docking maintaining portion 73. The holding portion 73 has a large plate shape. The plate thickness direction is parallel to the plate thickness direction of the side panel 72. Further, the holding portion 73 can be elastically deformed in the direction of the plate thickness. The interval between the pair of blades 73 is smaller than the outer diameter of the split sleeve 3. A claw 73a is formed before the holding portion 73. Protruding pieces φ are formed on both ends of the lower surface of the upper panel 71, respectively. The protruding pieces 74 extend in the longitudinal direction of the upper panel 71. The protruding piece 74 has a thick portion 74a and a thin portion 74b. The thick portion 74a is located on the central portion of the upper surface ί. A concave portion (support portion) 74c is formed in the thick portion 74a. The recess supports the end of the split sleeve 3. The pair of grip portions 73 are held by the outer surface of the split sleeve 3 of the recess 74c. A groove portion 74d is formed in the thin portion 74b. The optical fiber 2 1 a of the cable 2 1 is disposed in the groove portion 74d. 形成 Two window holes 72a are formed in each of the side panels 72. Window hole is the first of the receiving base 6 The second locking projection 6 04, 605. An inclined surface 72b is formed at the lower end of the two side panels 72. Figure 25 is a side perspective view of the mechanical cable connection box shown in Figure 1. Fig. 26 is a perspective view showing a state in which the side cover of the mechanical optical cable case shown in Fig. 1 is turned upside down. Figure 27 is a plan view showing the side cover of the mechanical cable connection box of the first embodiment. Figure 28 is a side elevational view of the side cover of the mechanical cable splice closure shown. Fig. 29 is a bottom view of the side cover of the mechanical cable connection box shown in Fig. 1. Negative (with the presentation of the 5----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- A cross-sectional view of the line. Figure 31 is a cross-sectional view taken along line XXXI-XXXI of Figure 27. Figure 32 is a cross-sectional view taken along line XXXII - XXXII of Figure 27. Figure 33 is a cross-sectional view taken along line XXXIII - XXXIII of Figure 27. Figure 34 is a front view of the side cover. The side cover 8 has an upper panel 81 and two side panels 8 2, It is formed of a synthetic resin having elasticity. The side panel 82 is elastically deformable in the thickness direction thereof. A protruding piece 84 is formed under the upper panel 81. The protruding piece 84 extends in the longitudinal direction of the upper panel 81. The protruding piece 84 is formed with a wide groove 84a and a groove 84b. The wide groove 84a is located on one end side of the protruding piece 84. The groove 84b is located on the other end side of the protruding piece 84. Connected to the wide groove 84a. The optical fiber cable 21 is housed in the wide groove 84a. The optical fiber 21a exposed by the covering of the optical fiber cable 21 is housed in the groove 84b. and, The thin portion 611b of the protruding piece 611 (refer to FIG. 6) of the susceptor 6 is inserted into the groove 84b. The thick portion of the protruding piece 611 of the susceptor 6 is inserted into the wide groove 8 4b. Q 6 1 1 a ° The inner surface of the side plate 82 of both sides is formed with a concave portion 82a. The concave portion 82a has an engaging surface 82b. The engaging surface 82b is inclined with respect to the height direction of the side cover 8. The concave portion 82a accommodates the guide convex portion 612 of the susceptor 6 (refer to Fig. 5). The engaging surface 82b is engaged with the guiding surface 6 12a of the guiding convex portion 612. also, Two side walls 82 are formed in the side panels 82 of the two sides. The window holes 82e are substantially parallelograms. The window hole 82e is a first locking projection 613 and a second locking projection 614 (see Fig. 5) for accommodating the base - -14 - 201027864. An inclined surface 82f is formed at a lower end of each of the side panels 82. then, Explain the assembly of this mechanical cable connection box. First of all, As shown in Figure 16, The split sleeve 3 is inserted between the grip portions 73 from above the center cover 7 which is turned upside down, Further, both end portions of the split sleeve 3 are fitted into the recess 74c of the center cover 7. the result, The outer peripheral surface of the split sleeve 3 is held by the grip portion 73, And the claw 73a of the grip portion 73 hooks the outer peripheral surface of the split sleeve 3, The split sleeve 3 is held by the center cover 7. then, As shown in Figure 5, Lower the center cover 7 from above the center of the base 6, a portion adjacent to the lower edge of the window hole 72a of the center cover 7, The lower surface 613b of the first locking projection 613 of the base 6 is disposed between the inclined surface 614a of the second locking projection 614. This result, The central cover 7 is temporarily fixed from the base 6 in a floating state. Will not fall off from the base 6. after that, Covering the side cover 8 from the end of the base 6, a portion adjacent to the lower edge of the window hole 8 4e of the side cover 8, The lower surface 613b of the first locking projection 613 of the base 6 is disposed between the inclined surface 614a of the second locking projection 614. This result, The side cover 8 is locked from the base 6 in a floating state. It does not fall off from the base 6. With the above work, Complete the assembly of the mechanical fiber optic cable connection box. then, Explain the action of the central cover 7. The central cover 7 can be squatted along the height of the base 6. It moves between the first temporary fixed position (see Fig. 35) and the first lock position (see Fig. 3 6), which will be described later. A portion adjacent to the lower edge of the window hole 72a of the center cover 7 is held by the lower surface 613b of the first locking projection -15-201027864 and the inclined surface 614a of the second locking projection 614. When the center cover 7 is temporarily fixed to the base 6, the position of the center cover 7 is the first temporary fixed position. The optical fiber 21a can be inserted into the split sleeve 3 at the first temporary fixed position. When the center cover 7 at the first temporary fixed position is pushed down, A portion adjacent to the lower edge of the window hole 72a of the center cover 7 is engaged with the lower surface 614b of the second locking protrusion 614, The center cover 7 is locked to the base 6. At this time, the position of the center cover 7 is at the first lock position. In the first locked position, The inner surface of the split sleeve 3 abuts against the outer surface of the optical fiber 21a. The mating state of the end faces of the optical fibers 21a is maintained. then, The operation of the side cover 8 will be described. The side cover 8 is parallel to the guiding surface 612a of the guiding protrusion 612 of the base 6 (the side cover 8 is located obliquely downward of the central cover 7), It moves between the second temporary fixing position and the second locking position which will be described later. The lower surface 613b of the first locking projection 613 adjacent to the lower edge portion of the window hole 82e of the side cover 8 is held by the inclined surface 614a of the second locking projection 614. The position of the side cover 8 when the side cover 8 is temporarily fixed to the base 6 is the second temporary fixing position. The wide groove 61 lc of the protruding piece 611 of the base 6 at the second temporary fixing position is opposed to the wide groove 84a of the side cover 8 with a space therebetween. The groove 611d of the protruding piece 611 is opposed to the groove 84d of the side cover 8 with a space therebetween. At this time, the optical fiber cable 21 (the covered portion) can be inserted into the wide groove 611c, 84a, The optical fiber 21a (the portion where the coating of the optical fiber cable 21 is removed) can be inserted into the groove 61 Id, Plug and unplug 84b. When the side cover 8 at the second temporary fixing position is pushed down, The side cover 8 is -16-201027864. The engaging surface 8 2b of the recess 82a is guided by the guiding surface 6 12a of the guiding protrusion 612 of the base 6. The side cover 8 moves obliquely downward along the guiding surface 612a. The lower edge portion of the window hole 8 2e adjacent to the side cover 8 is engaged with the lower portion 614b of the second locking projection 614. The position of the side cover 8 at this time is the second locking position. When the side cover 8 is moved from the second temporary fixing position to the second locking position, The wide groove 84a and the groove 84b of the side cover 8 are approached toward the split sleeve 3 side. at this time , The inner surface of the wide groove 84a sends the optical fiber cable 2 1 to the side of the split sleeve 3, The inner surface of the φ groove 84b sends the optical fiber 21a to the side of the split sleeve 3. Simultaneously, The inner surface of the wide groove 8 4a pushes the optical fiber cable 21 to the inner surface of the wide groove 611c of the base 6, The inner surface of the groove 84b pushes the optical fiber 21a to the groove 611d of the base 6, This result, The end faces of the optical fibers 21a are butted against each other with a strong force. The optical fiber 21a located on the outer surface of the split sleeve 3 is deflected in the accommodating space 2020a of the susceptor 6, The optical fiber cable 21 is held by the side cover 8 and the base 6. Fig. 35 is a view showing a cross section of the base of the mechanical optical cable junction box shown in Fig. 1 in a state of being separated from the central cover. Fig. 36 is a view showing a cross section of the φ of the mechanical optical cable splicing box shown in Fig. 1 in a state in which the center cover is fitted. Next, The connection operation of the optical fiber cable 2 1 by the mechanical optical cable connection box 1 will be described. First, the central cover 7 is placed in the first temporary fixed position. The side cover 8 is placed in the second temporary fixed position. In this state, Inserting the optical fibers 21 a of the two optical fiber cables 21 into the split sleeve 3, respectively. The end faces of the optical fibers 2 1 a are butted against each other. then, The optical fiber cable 21 is disposed on the -17-201027864 wide groove 611c of the protruding piece 611 of the base 6, The optical fiber 21a is disposed in the groove 6ld of the protruding piece 611. after that, Push one of the side covers 8 downward to move to the second lock position. then, Push the other side cover 8 downward to move it to the second lock position. This result is as above, The end faces of the optical fibers 21a are connected to each other by a strong force. The accommodating space 6 02a of the base 6 of the optical fiber 21a located outside the dividing sleeve 3 is bent, The optical fiber cable 21 is held by the side cover 8 and the base 6. then, As shown in Figure 35, As shown in Figure 36, The center cover 7 is pressed into the second lock position from the first temporary fixing position. This result, The grip portion 73 of the center cover 7 is engaged with the engaging portion 603 of the base 6, and is pressed. The holding portion 73 presses the outer peripheral surface of the split sleeve 3 to reduce the diameter of the split sleeve 3. When the diameter of the split sleeve 3 is reduced, The gap between the inner face 3a of the split sleeve 3 and the outer face of the optical fiber 21a will disappear. The end faces of the optical fibers 21a are correctly connected to each other, Maintain its status. According to the first embodiment, Since the butt joint adopts the split sleeve 3 which does not require high processing precision, Can reduce manufacturing costs. In addition, Since the diameter of the split sleeve 3 can be reduced by the engaging portion 603 and the holding portion 73, The end faces of the optical fibers can be correctly connected to each other in the same manner as the conventional mechanical optical cable connection box. Moreover, the performance of the mechanical cable connection box can be suppressed from being lowered. also, Since the abutting portions of the two optical fibers 21a are in close contact with the split sleeve 3 and the optical fiber cable 21 is fixed to both ends of the casing 5, When the optical fiber cable 21 is applied with a strong force, it is not easy to fall off. and, Even if the vibration is applied, the butt joint of the fiber 21a is not easily loosened. The reliability of the connection is high. and, Since the optical fiber 21a is bent in the accommodating space 602a of the susceptor 6, The difference in thermal expansion between the casing 5 and the optical fiber 21a at the time of temperature change can be absorbed. As above, The mechanical optical cable connection box of the first embodiment, The optical fiber cable 21 is applied with a strong pulling force and is not easily peeled off. and, Even if the abutting portion of the two optical fibers 21a is applied, it is not easy to loosen. and, Since φ can absorb the difference in thermal expansion between the casing 5 and the optical fiber 21a due to temperature change, It is suitable as a mechanical fiber optic cable connection box for automobiles. Figure 37 is a perspective view showing a state in which the center cover of the mechanical optical cable splicing box of the second embodiment of the present invention is turned upside down. Figure 38 is a perspective view of the central cover shown in Figure 37. Figure 39 is a cross-sectional view showing the susceptor of the mechanical optical cable junction box of the second embodiment of the present invention. Figure 40 is a cross-sectional view taken along line IVX-IVX of Figure 39. Fig. 4 is a view showing a cross section of the susceptor of the mechanical optical cable splicing box according to the second embodiment of the present invention in a state of being separated from the center cover. Fig. 42 is a view showing a cross-sectional view showing a state in which the base of the mechanical optical cable junction box of the second embodiment of the present invention is fitted to the center cover. The same reference numerals are given to the same portions as those in the first embodiment, and the description thereof will be omitted. Hereinafter, only the main difference from the first embodiment will be described. The abutting portion of the mechanical optical cable junction box of the first embodiment is a metal dividing sleeve 3, Although different from the central cover 7, But as shown in Figure 37, Figure 38, The abutting portion 203 of the mechanical optical cable junction box of the second embodiment is made of resin and is formed integrally with the upper cover 271 of the center cover 207. -19 - 201027864 The butting portion 203 has the abutting portion main body 203h, the center hole 203a and the slit 203b, and Ditch (part of the docking maintaining portion) 203 c. The center hole 203 e is formed approximately at the center of the abutment portion body 203h of the corner column. The slit 203b extends along the length of the abutting portion body 203h. Connected to the central hole 2 0 3 a. The groove 2 0 3 c is formed in parallel with the slit 2 0 3 b below the abutting portion body 203h. As shown in Figure 39, As shown in Figure 40, Two wedges (protrusions) 2603 are integrally formed with the base 206 at the recess 602 of the wide portion 601 of the base 206 of the mechanical cable connector. The wedge (which constitutes the abutting maintaining portion together with the groove 203c) 2603 is inserted into the groove 203c of the butt holding portion 203. then, The basic operation of the mechanical optical cable junction box of the second embodiment will be described. First of all, The center cover 207 is moved downward from the state shown in Fig. 41. the result, As shown in Figure 42, The wedge 2 603 of the base 206 is inserted into the groove 203c of the center cover 207. The wedge 2603 is inserted into the groove 203c of the abutting portion 203, When the groove of the groove 2 03 c is widened, The width of the slit 203b is narrowed and the inner diameter of the center hole 203a becomes small. The inner surface of the center hole 203a of the abutting portion 203 is in close contact with the optical fiber 2 1 a, The optical fibers 2 1 a are held in the abutting portion 203 correctly in the butted state. According to the second embodiment, The same effects as those of the first embodiment can be obtained. And since the abutting portion 203 and the central cover 207 are integrally formed of a resin, The manufacturing cost of the mechanical fiber optic cable connection box can be further reduced. Fig. 43 is a perspective view showing the mechanical optical cable of the third embodiment of the present invention -20- 201027864. The center cover of the connection box is vertically inverted. Figure 44 is a cross-sectional view showing the susceptor of the mechanical optical cable junction box of the third embodiment of the present invention. Figure 45 is a cross-sectional view taken along line IVXV - IVXV of Figure 44. Fig. 46 is a view showing a cross section of the susceptor of the mechanical optical cable splicing box according to the third embodiment of the present invention in a separated state from the central cover. Fig. 47 is a view showing a cross section of the susceptor of the mechanical optical cable splicing box according to the third embodiment of the present invention in a state in which the center cover is fitted. The same reference numerals are given to the same portions as those in the first embodiment, and the description thereof will be omitted. Hereinafter, only the main difference from the first embodiment will be described. The abutting portion 303 of the mechanical optical cable junction box of the third embodiment shown in Fig. 43 is made of resin. It is formed integrally with the upper cover 371 of the central cover 307. The abutting portion 303 has a butt portion body 03h and a center hole 303a and a slit 303b. The cross-sectional shape of the butted portion 303 is substantially U-shaped. The center hole 3 03 a is formed in the abutment body 3 03h of the corner column. The center hole 3〇3a extends along the length of the butt portion body 03h, Connected to the slit 3 03b. The slit 3 03b is formed under the docking portion body 03h, Extending along the length of the docking portion body 03h, Connected to the center hole 3 0 3 a. As shown in Figure 44, Figure 45, The pressing piece 3 603 is integrally formed with the base 306 at the recess 602 of the wide portion 601 of the base 306 of the mechanical cable splicing box. The push piece 3 603 is inserted into the gap of the butt joint 3 03 3 03b > Next, the operation of the basic -21 - 201027864 of the mechanical optical cable splicing box of the third embodiment will be described. Put the central cover 3 07, Move down from the state shown in Figure 46. the result, As shown in Figure 47, The pressing piece 3603 of the base 306 is inserted into the slit 303b of the center cover 307. When the pressing piece 3603 is inserted into the slit 303b of the abutting portion 03, The optical fiber 21a in the center hole 303a is pushed to the inner surface of the center hole 303a by the pressing piece 3603. therefore, The optical fibers 2 a are correctly connected to each other, Further, the optical fiber 21a is surely held by the inner peripheral surface of the center hole 303a and the pressing piece 3 603. According to the third embodiment, The same operational effects as those of the second embodiment can be obtained. Fig. 48 is a view showing a cross section of the susceptor of the mechanical optical cable splicing box according to the fourth embodiment of the present invention in a separated state from the central cover. Fig. 49 is a view showing a cross section of a state in which a susceptor of a mechanical optical cable splicing box according to a fourth embodiment of the present invention is fitted to a central cover. As shown in Figure 48, Figure 49, The abutting portion 403 of the mechanical optical cable junction box of the fourth embodiment is made of resin as in the second embodiment. And formed integrally with the upper panel 471 of the central cover 407. The abutting portion 403 has a butt portion body 403h, a center hole 403a, and a slit 4 0 3 b. The center hole 403a is formed in a central portion of the abutting portion main body 403h which is substantially angular. The center hole 403a extends along the length direction of the abutting portion body 4〇3h. Connected to the slit 403b. The slit 403b is formed under the docking body 403h. Extending along the length of the docking portion body 403h, Connected to the central hole 403 a. -22- 201027864 Two wedges (projecting portions) 4603 constituting the butt-holding portion at the base 406 of the mechanical optical cable junction box are integrally formed with the base 406. The die 4603 is engaged with the side of the abutting portion 403. Next, the basic operation of the mechanical optical cable junction box of the fourth embodiment will be described. The center cover 407 is moved downward from the state shown in Fig. 48. the result , As shown in Figure 49, The wedge 4603 of the base 406 presses the side φ face of the abutting portion 403. When the wedge 46 03 pushes the side of the abutting portion 403, The width of the slit 403b is narrowed and the inner diameter of the center hole 403a becomes small. The inner surface of the abutting portion 403 is brought into close contact with the optical fiber 21a. The optical fibers 21a are held in the mating portion 403 in a state of being correctly connected to each other. According to the fourth embodiment, The same operational effects as those of the second embodiment can be obtained. also, The docking maintenance unit is not limited to the first one 2, 4 implementation forms, E.g, It is also possible to rotatably set the rotating lever having the cam surface as a docking maintaining portion to the base. Rotate the rotating rod, The abutting portion is directly or indirectly pressed by the cam surface so that the inner surface of the abutting portion is in close contact with the outer surface of the optical fiber. also, It is also possible to form the docking maintaining portion separately from the housing. Use a wedge that can be inserted into the housing, The abutting portion is directly or indirectly pressed by the wedge inserted into the casing so that the inner surface of the abutting portion is in close contact with the outer surface of the optical fiber. In addition, In the foregoing embodiment, the housing is a base, Central cover, And side cover, However, the constitution of the casing is not limited to this. For example, the housing may be formed by a base and a cover covering the upper surface of the base. In the first embodiment, The central cover 7 is configured to be movable between a first temporary position -23-201027864 and a first lock position. Further, the side cover 8 is configured to be movable between the second temporary fixing position and the second locking position. But it does not necessarily need to adopt such a composition. In addition, In the first embodiment, When the side cover 8 moves from the second temporary fixing position to the second locking position, The side cover 8 is sent to the side of the split sleeve 3 by the guide protrusion 612 of the base 6, But it does not necessarily need to adopt such a composition, It is also possible to move the side cover 8 in parallel with the height direction Η of the susceptor 6. at this time, First of all, when the fiber optic cable is connected, Move one of the _ side covers from the second temporary fixing position to the second locking position. then, Push the other fiber optic cable into the butt joint side. After bending the fiber exposed from the butt joint, The other side cover may be moved from the second temporary fixing position to the second locking position. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a mechanical optical cable junction box according to an embodiment of the present invention. ❹ Fig. 2 is a perspective view showing the state in which the mechanical optical cable connection box shown in Fig. 1 is turned upside down. Fig. 3 is a front view of the mechanical optical cable junction box shown in Fig. 1. Fig. 4 is a perspective view showing the side cover of the mechanical cable connecting case shown in Fig. 1 taken apart. Fig. 5 is a perspective view showing the base and the center cover of the mechanical cable connecting case shown in Fig. 1. Figure 6 is a view of the base of the mechanical fiber optic cable connection box shown in Figure 1 -24-201027864. Figure 7 is a side elevational view of the base of the mechanical cable splice closure shown in Figure 1. Figure 8 is a cross-sectional view taken along line VIII-VIII of Figure 6. Figure 9 is a cross-sectional view taken along line IX _ IX of Figure 6. Figure 10 is a cross-sectional view taken along line X-X of Figure 6. Fig. 1 is a cross-sectional view taken along line XI-XI of Fig. 6. Ο Figure 12 is a cross-sectional view taken along line XII-XII of Figure 6. Figure 13 is a cross-sectional view taken along line XIII-XIII of Figure 6. Figure 14 is a cross-sectional view taken along line XIV-XIV of Figure 6. Figure 15 is a perspective view of the central cover of the mechanical cable connector shown in Figure 1. Fig. 16 is a perspective view showing the split sleeve of the mechanical cable connecting case shown in Fig. 1 and the center cover which is turned upside down. Figure 17 is a plan view of the central cover φ of the mechanical cable connection box shown in Figure 1. Figure 18 is a side elevational view of the central cover of the mechanical cable splice closure shown in Figure 1. Figure 19 is a bottom plan view of the central cover of the mechanical cable connector shown in Figure 1. Figure 20 is a cross-sectional view taken along line XX _ XX of Figure 17. Figure 21 is a cross-sectional view taken along line XXI-XXI of Figure 17. Figure 22 is a cross-sectional view taken along line XXII-XXII of Figure 17. Figure 23 is a section along the XXIII-XXIII line shown in Figure 17 -25- 201027864. Figure 24 is a front view of the central cover. Figure 25 is a perspective view of the side cover of the mechanical cable connector shown in Figure 1. Fig. 26 is a perspective view showing a state in which the side cover of the mechanical optical cable connecting case shown in Fig. 1 is turned upside down. Figure 27 is a plan view of the side cover of the mechanical cable connector shown in Figure 1. Figure 28 is a side elevational view of the side cover of the mechanical cable splice closure shown in Figure 1. Figure 29 is a bottom plan view of the side cover of the mechanical cable splice closure shown in Figure 1. Figure 30 is a cross-sectional view taken along line XXX-XXX of Figure 27. Figure 31 is a cross-sectional view taken along line XXXI - XXXI of Figure 27. Figure 32 is a cross-sectional view taken along line XXXII-XXXII of Figure 27. Figure 33 is a cross-sectional view taken along the line XXXIII-XXXIII shown in Figure 27. Figure 34 is a front view of the side cover. Fig. 35 is a view showing a cross section of the base of the mechanical optical cable junction box shown in Fig. 1 in a state of being separated from the central cover. Fig. 36 is a view showing a cross section of the base of the mechanical optical cable junction box shown in Fig. 1 in a state in which the base cover is fitted. Figure 37 is a perspective view showing a state in which the center cover of the mechanical optical cable junction box according to the second embodiment of the present invention is turned upside down. -26- 201027864 Figure 38 is a perspective view of the central cover shown in Figure 37. Figure 39 is a cross-sectional view showing the susceptor of the mechanical optical cable splicing box according to the second embodiment of the present invention. Figure 40 is a cross-sectional view taken along line IVX-IVX of Figure 39. Figure 41 is a view showing a cross section of the susceptor of the mechanical optical cable splicing box according to the second embodiment of the present invention in a separated state from the central cover. Fig. 42 is a view showing a cross section of a state in which a susceptor of a mechanical optical cable φ connection box according to a second embodiment of the present invention is fitted to a central cover. Figure 43 is a perspective view showing a state in which the center cover of the mechanical optical cable junction box of the third embodiment of the present invention is turned upside down. Figure 44 is a cross-sectional view showing the susceptor of the mechanical optical cable splicing box according to the third embodiment of the present invention. Figure 45 is a cross-sectional view taken along line IVXV - IVXV of Figure 44. Fig. 46 is a view showing a cross section of the susceptor of the mechanical optical cable splicing box according to the third embodiment of the present invention in a separated state from the central cover. Fig. 47 is a view showing a cross section of a state in which the base of the mechanical optical cable junction box of the third embodiment of the present invention is fitted to the center cover. Fig. 48 is a view showing a cross section of the susceptor of the mechanical optical cable splicing box according to the fourth embodiment of the present invention in a separated state from the central cover. Fig. 49 is a view showing a cross section of the susceptor of the mechanical optical cable splicing box according to the fourth embodiment of the present invention in a state in which the center cover is fitted. [Main component symbol description] 1: Mechanical cable connection box -27- 201027864 2 1 : Fiber optic cable 2 1 a : Fiber 2 0 3, 3 03, 403: Docking part 203 a, 3 03 a, 403a: Center hole 203b, 303b, 403: Gap 203c: ditch
203h，303h,403h:對接部本體 2603,4603 :楔（突出部） 3 :分割套筒（對接部） 3 a :空間 3b :縫隙 3 603 :推壓片 5 :殼體 6,206,306,406 '·基座 601 :寬幅部203h, 303h, 403h: butt joint body 2603, 4603: wedge (protrusion) 3: split sleeve (butt joint) 3 a : space 3b: slit 3 603: push piece 5: housing 6, 206, 306, 406 '· base 601 : wide section
602 :凹部 602a:光纖收容空間 6 0 3 :卡合部 6 0 3 a :傾斜部 604 :第1卡止突起 6 0 4 a :傾斜面 604b :下面 605 :第2卡止突起 6 0 5 a :傾斜面 -28- 201027864 605b ：下面 610 :凹部 61 1 :突出片 6 1 1 a ·厚片部 6 1 1 b :薄片部 6 1 1 c :寬幅溝 612 :導引凸部（導引部） Λ 612a :導引面 6 1 4 a :傾斜面 7,207,307,407 :中央蓋 71,271,371,471 :上面板 72 :側面板 72a :窗孔 73 :挾持部 73a :爪 φ 74 :突出片 74a :厚壁部 74b :薄壁部 74c :凹部（支持部） 74d :溝部 8 :側蓋 81 :上面板 82a :凹部 8 2b :卡合部 -29 201027864 8 2 e :窗孔 84 :突出片 8 4 a :寬幅溝 8 4b ：溝 8 4 e :窗孔 -30-602: recessed portion 602a: optical fiber accommodating space 6 0 3 : engaging portion 6 0 3 a : inclined portion 604 : first locking projection 6 0 4 a : inclined surface 604b : lower surface 605 : second locking projection 6 0 5 a : inclined surface -28- 201027864 605b : lower surface 610 : recessed portion 61 1 : protruding piece 6 1 1 a · slab portion 6 1 1 b : sheet portion 6 1 1 c : wide groove 612 : guiding convex portion (guide ) 612a : guide surface 6 1 4 a : inclined surface 7, 207, 307, 407: central cover 71, 271, 371, 471: upper panel 72: side panel 72a: window hole 73: grip portion 73a: claw φ 74: protruding piece 74a: thick portion 74b: Thin portion 74c: recess (support portion) 74d: groove portion 8: side cover 81: upper panel 82a: recess 8 2b: engaging portion -29 201027864 8 2 e : window hole 84: protruding piece 8 4 a : wide groove 8 4b : Ditch 8 4 e : Window hole -30-