200400912 (1) 玖、發明說明 【發明所屬之技術領域】 本發明是關於自動階梯或移動步道等的輸送帶裝置。 【先前技術】 自動階梯（escalator)或移動步道等的輸送帶 (conveyer)裝置具備配設有台階滾子的複數個台階。這 些複數個台階藉由配設於各台階的台階滾子被無端狀的台 階鍵以預定的節距（pitch )連結’作成與此台階鏈一 體’藉由台階鏈被台階驅動機構驅動，使所有的台階同步 無間隙地移動而構成。而且’這些複數個台階藉由台階滾 子卡合於設置於構造物的台階導軌（g u i d e r a i 1 )，被此 台階導軌支持’以在入口與出口之間循環移動。此外，在 移動步道因複數個台階在水平方向移動爲一般，故也有特 別稱台階爲踏板的情形，但在本說明書中移動步道的情形 也當作台階以統一標記》 驅動台階鏈的鏈驅動機構接受驅動馬達的驅動力在旋 轉的驅動鏈輪捲繞台階鏈的折回端部，經由驅動鏈輪將馬 達的驅動力傳達給台階鏈的形式者爲一般。這種鏈驅動機 構通常配置於稱爲輸送帶裝置的入口附近或出口附近的桁 架（t r u s s )的構造物內部。 但是，配設有鏈驅動機構的桁架習知需要進行安裝作 業用的充分的空間，惟近年來因安裝技術的發展等使桁架 的小型化被實現，使輸送帶裝置全體薄型謀求省空間化的 (2) (2)200400912 嘗試被進行。如以上，對於桁架被小型化的情形配設於此 桁架內部的鏈驅動機構的驅動鏈輪需要使用小徑的鏈輪。 但是’小徑的鏈輪當作鏈驅動機構的驅動鏈輪使用的情形 在連結於台階鏈的台階滾子會發生較大的速度不穩，此台 階滾子的速度不穩成爲台階的振動而顯現，發生使輸送帶 裝置的乘坐感覺降低的問題。 爲了抑制台階滾子的速度不穩使台階的移動平順的技 術’例如日本特開平8 - 2 1 7 3 6 8號公報所揭示的技術被提 出。在此曰本特開平8-217368號公報所揭示的技術如第 1圖所示支持藉由台階鏈1 0 0連結的台階滾子1 〇 1的台階 導軌102的支持面（移動軌道）102a係成爲僅距驅動鏈 輪103的切線l〇3a間隔ho的位置而設定台階導軌102與 驅動鏈輪1 〇 3的相對位置關係。而且，在接近台階導軌 102的驅動鏈輪103的前端側配設補償軌條（raii ) 104。 此補償軌條1 〇 4係被作成支持台階滾子1 〇 1的支持面（移 動軌道）1 〇 4 a在台階導軌1 〇 2側與此台階導軌i 0 2的支 持面1 0 2 a相等高度，在驅動鏈輪i 03側與此驅動鏈輪 103的台階滾子101所咬合的溝槽相等高度，並且，被作 成其中途部爲平滑的曲線形狀。而且，被此補償軌條1 〇 4 的支持面1 〇 4 a支持移動的台階滾子〗〇 1由直線運動經曲 線運動被咬合於驅動鏈輪10 3的溝槽，藉由伴隨著驅動鏈 輪1 03的旋轉而旋轉運動，使台階滾子1 〇 χ的速度不穩被 抑制。 但是’在上述習知的技術中雖然可有效地抑制台階滾 2234 -9- (3) (3)200400912 子101的速度不穩，但因對驅動鏈輪103台階導軌102被 設置於高的位置，故有在謀求輸送帶裝置全體的薄型化上 不利的問題。即因驅動鏈輪103的切線103a與台階導軌 1〇2的支持面i〇2a之間的間隔ho變成與台階鏈100的鏈 環鏈帶（link )長成比例的値，特別是對於以小徑的鏈輪 當作驅動鏈輪103使用的情形，對驅動鏈輪103的台階鏈 1 〇〇的鏈環鏈帶長成爲相對地大的値，其結果驅動鏈輪 1 0 3的切線1 〇 3 a與台階導軌1 0 2的支持面1 0 2 a之間的間 隔ho變大。因此，桁架大型化，對薄型化輸送帶裝置全 體帶來障礙。 而且，若也考慮使去程與回程反轉運轉輸送帶裝置的 情形的話，由於需要台階導軌102的回歸側也以同樣的間 隔1 〇在驅動鏈輪1 〇 3的下方分離而設置，故上下的間隔 (2x ho)需要相當的高度尺寸。 假設驅動鏈輪 103爲 3 48.4mm的節距圓（pitch circle)徑齒數爲 8片，台階鏈 1〇〇的鏈環鏈帶長爲 1 3 3.3 3mm的情形，爲了完全消除在上述習知技術的台階 滾子100的速度不穩，在藉由本發明者的試算，驅動鏈輪 103的切線l〇3a與台階導軌1〇2的支持面102a之間的間 隔ho需要35.3mm以上。而且，合倂去程側與回程側的 話’加上驅動鏈輪103的大小也需70.6mm (2 X ho)的多 餘的高度尺寸。因此，成爲損及減小驅動鏈輪10 3的節距 圓徑到3 4 8.4 m m所造成的省空間效果的結果。 (4) (4)200400912 【發明內容】 本發明是鑒於如以上的習知的實情所進行的創作，其 目的是提供有效地抑制台階滾子的速度不穩，以確保良好 的乘坐感覺，並且可實現裝置全體的薄型化的輸送帶裝 置。 與本發明有關的輸送帶裝置，其特徵包含： 台階導軌； 具有沿著該台階導軌移動的台階滾子的複數個台階； 以預定的節距連結該複數個台階的台階滾子的台階 鏈； 使該台階移動於預定方向用的驅動力產生的旋轉驅動 裝置；以及 接受該旋轉驅動裝置的驅動力而旋轉，對該台階鏈傳 達該旋轉驅動裝置的驅動力的驅動鏈輪， 令該驅動鏈輪的圓速度爲Vt，令連結於該台階鏈移 動的該台階滾子的平均速度爲Vo，令該台階滾子的速度 由 Vt減少到Vo的位置爲基準位置時，沿著該台階導軌 存在複數個該基準位置之中，在位於最接近該驅動鏈輪的 基準位置與由此基準位置分離該台階鏈的鏈環鏈帶長份的 該驅動鏈輪上的驅動起點之間的該台階導軌的部位配設有 突出於該台階段的山型的彎曲部。 在此輸送帶裝置中若啓動旋轉驅動裝置的話’驅動鏈 輪接受此旋轉驅動裝置的驅動力而旋轉，藉由此驅動鏈輪 的旋轉使旋轉驅動裝置的驅動力被傳達到台階鏈。若台階 -11 - (5) (5)200400912 鏈被驅動的話，由此台階鏈連結的複數個台階的各台階滾 子沿著台階導軌循環移動，運送搭乘於台階上的乘客。 此處若著眼於以台階鏈連結的各台階滾子之中互相接 鄰的三個台階滾子的話，前頭的台階滾子接近驅動鏈輪超 過預定的位置（基準位置）時’此前頭的台階滾子的移動 速度比平均速度還慢。此時’若第二個台階滾子到達配設 於位於最接近驅動鏈輪的基準位置與驅動鏈輪上的驅動起 點（台階滾子藉由驅動鏈輪以圓速度v t進行進給動作的 起點，由最接近驅動鏈輪的基準位置分離台階鏈的鏈環鏈 帶長份的驅動鏈輪上的點）之間的台階導軌的部位的山型 的彎曲部的話，依照該彎曲部的山型’第二個台階滾子的 高度位置會變化。若第二個台階滾子的高度位置變化的 話，因各台階滾子間的節距（鏈環鏈帶長）爲一定，故成 爲第三個台階滾子接近前頭的台階滾子僅第二個台階滾子 的高度位置的變化份，使第三個台階滾子被增速。據此， 前頭的台階滾子的移動速度的降低份被第三個台階滾子的 增速份抵銷，第三個台階滾子的移動速度被維持在平均速 度。 前頭的台階滾子更往前進行的話’此前頭的台階滾子 的移動速度會反轉變成比平均速度還快。此時，若第二個 台階滾子超過配設於台階導軌的彎曲部的話，第二個台階 滾子的高度位置返回到原來’第三個台階滾子自前頭的台 階滾子分離，第三個台階滾子被減速。據此，前頭的台階 滾子的移動速度的上升份被第三個台階滾子的減速份抵 -12 - (6) 200400912 銷’第三個台階滾子的移動速度被維持在平均速度 如以上’在與本發明有關的輸送帶裝置中，因 於位於最接近驅動鏈輪的基準位置與驅動鏈輪上的 點之間的台階導軌的部位的山型的彎曲部吸收先行 滾子所發生的速度不穩，使先行的台階滾子的速度 傳達到後續的台階滾子，故大致維持台階滾子的移 在平均速度，可抑制起因於台階滾子的速度不穩的 振動’可確保良好的乘坐感覺。而且，配設於台階 彎曲部的山型因無須那麼大，故在實現裝置全體的 上有利。 【實施方式】 以下參照圖面說明本發明的實施形態。 適用本發明的輸送帶裝置的全體構成槪略地顯示 2圖。此第2圖所示的輸送帶裝置31是以對路面略 地設置，運送乘客的移動步道而構成，具備支持自身 及乘客的荷重的稱爲桁架的構造物32。此構造物32 容於凹設在路面的下方的坑（pit)內。 在構造物32的內部遍及輸送帶裝置31的入口 3 出口 3 lb而回轉以配設有台階導軌33。此台階導軌 導引運送乘客的複數個台階3 4的移動。即在複數個 3 4分別配設有台階滾子3 5 ’藉由此台階滾子3 5沿著 導軌33移動’使各台階34遍及輸送帶裝置31的 3 1 a與出□ 3 1 b循環移動。 配設 動起 台階 穩不 速度 階的 軌的 型化 於第 水平 重以 是收 1 a與 3 3是 台階 :台階 '入口 -13- 乂： ‘-W. ft (7) (7)200400912 台階導軌3 3具備：在其去程側具有支持面的軌條本體 3 3 a與配設於回歸側的按壓軌條3 3 b °而且’移動於去程 側的台階3 4藉由台階滾子3 5支持於軌條本體3 3 a的支持 面上，使踏面大致與路面相同高度位置’露出於構造物 32的外部’同時由入口 31a朝出口 31b朝第2圖中箭頭A 方向平行移動。此外，在去程側的入口 3 1 a附近以及出口 3 1b附近配設有在前端安裝有梳（COmb )的梳板（comb p 1 a t e ) 3 6，使台階3 4移動於梳板3 6的下方。 而且，移動於回歸側的台階3 4在台階滾子3 5卡合於 軌條本體3 3 a與按壓軌條3 3 b之間的狀態下’由入口 3 1 a 朝出口 3 1 b回歸。而且’在軌條本體3 3 a的入口 3 1 a側配 設有在對此軌條本體3 3 a分離的方向可移動的可動軌條 33c ° 複數個台階3 4藉由配設於各台階34的台階滾子3 5 被無端狀的台階鏈37以預定的節距連結，作成與此台階 鏈37 —體。而且，在各台階34的台階滾子35對接於台 階導軌33的狀態下’台階鏈37藉由被鏈驅動機構驅動使 各台階3 4被台階導軌3 3導引，無間隙地在入口 3 1 a與出 口 3 1 b之間移動。 鏈驅動機構係成爲接受驅動馬達3 8的驅動力在旋轉 的驅動鏈輪3 9捲繞台階鏈3 7的折回部分，經由驅動鏈輪 3 9將驅動馬達3 8的驅動力傳達給台階鏈3 7的構造。 成爲驅動源的驅動馬達3 8係配設於構造物3 2的內 部，經由驅動鏈4〇連結於驅動鐽輪39。驅動鏈輪39位 (8) (8)200400912 於輸送帶裝置3 1的出口 3 1 b側，旋轉自如地配設於構造 物3 2的內部’接受驅動馬達3 8的驅動力而旋轉，以對台 階鏈3 7傳達驅動馬達3 8的驅動力。即驅動鏈輪3 9在接 鄰的齒與齒之間在咬合藉由台階鏈3 7連結的台階滾子3 5 的狀態下，藉由接受驅動馬達3 8的驅動力以預定的圓速 度（節距圓速度）旋轉，以進給動作台階鏈3 7以及連結 於此台階鏈3 7的台階滾子3 5。在適用本發明的輸送帶裝 置3 1 ’此驅動鏈輪3 9例如使用齒數爲1 6片左右的小徑 鏈輪。藉由以這種小型的鏈輪當作驅動鏈輪3 9而使用， 使構造物3 2小型化、輸送帶裝置3 1全體的薄型化被實 現’可謀求省空間化。 而且，在輸送帶裝置3 1的入口 3 1 a側配設有從動於 驅動鏈輪3 9而旋轉，與驅動鏈輪3 9 —起動作使台階鏈 3 7進給動作的從動鏈輪4 1。此從動鏈輪4 1被作成與驅動 鏈輪3 9略同徑，旋轉自如地配設於構造物3 2的內部。而 且，由此從動鏈輪41遍及驅動鏈輪3 9懸掛有台階鏈 37 « 此從動鏈輪4 1藉由鏈緊張機構的彈簧構件4 2增強作 用於由驅動鏈輪3 9分離的方向’用以對台階鏈3 7賦予最 佳的張力。而且，當在台階鏈3 7產生伸長時’藉由從動 鏈輪4 1接受由鏈緊張機構的彈簧構·件42產生的增強作用 力’在預定的範圍內移動於由驅動鏈輪3 9分離的方向’ 使台階鏈3 7的鬆弛被防止。此外’上述台階導軌3 3的可 動軌條3 3 c在從動鏈輪4 1移動時接受由鏈緊張機構的彈 -15 - (9) (9)200400912 簧構件42產生的增強作用力，與從動鏈輪41連動而移動 於由驅動鏈輪39分離的方向。 但是’藉由台階鏈3 7連結沿著台階導軌3 3移動的台 階滾子3 5在由仿照台階導軌3 3的直線的移動切換成仿照 驅動鏈輪3 9的曲線移動的過程中，因咬合於驅動鏈輪3 9 的影響而在其移動速度發生速度不穩。在此台階滾子3 5 所發生的速度不穩係驅動鏈輪3 9越小徑越顯著，成爲在 台階34使振動發生使輸送帶裝置31的乘坐感覺下降的要 因。 因此，在適用本發明的輸送帶裝置3 1中，台階導軌 3 3的前端部具體上爲在對例如軌條本體3 3 a的去程側的 驅動鏈輪3 9的導入部位配設吸收台階滾子3 5的速度不穩 用的山型的彎曲部43。此處，對驅動鏈輪39的導入部位 是指由台階導軌33對驅動鏈輪· 39交接台階滾子35的區 域（位置）。 而且在此輸送帶裝置3 1中，在位於台階導軌3 3的回 歸側的驅動鏈輪3 9側的前端部或位於可動軌條3 3 c的去 程側以及回歸側的從動鏈輪4 1側的前端部，也同樣地配 設有吸收台階滾子35的速度不穩用的山型的彎曲部43。 而且，台階滾子35依照這些彎曲部43的形狀的軌跡，用 以通過配設有此彎曲部43的部位。此外，在與這些彎曲 部43面對的位置，使台階滾子35沿著這些彎曲部43可 適當地移動而分別配設有凹部44。 而且，在與配設於軌條本體33a的去程側的驅動鏈輪 -16 - (10) 200400912 3 9附近的部位的彎曲部4 3的前段（入口 3 1 a側）面對 位置’配設有防止先行的台階滾子35因通過彎曲部43 影響而凸起於後續的台階滾子35的發生用的按壓構 4 5。此按壓構件4 5配設於梳板3 6的下方，對接於移 於驅動鏈輪3 9附近的台階滾子3 5的上端部，以防止此 階滾子3 5的凸起。而且，在面對配設於可動軌條3 3 c 去程側的從動鏈輪4 1附近的部位的彎曲部4 3的後段（ 口 3 1 b側）的位置’也同樣地配設有對接於台階滾子 的上端部’以防止此台階滾子35的凸起用的按壓構 45 ° 如以上的彎曲部43若至少配設於對軌條本體33a 去程側的驅動鏈輪3 9的導入部位的話，可有效地吸收 階滾子3 5的速度不穩使移動平順，可有效地抑制台階 所產生的振動，而藉由在位於台階導軌3 3的回歸側的 動鏈輪3 9側的前端部也配設彎曲部43，即使是使輸送 裝置3 1反轉運轉的情形也能使台階滾子35的移動平順 可有效地抑制台階34所產生的振動。 而且，從動鏈輪4 1雖然有因台階滾子3 5的速度不 的影響使旋轉速度容易變的不穩定的傾向，但藉由在位 可動軌條3 3 c的去程側以及回歸側的從動鏈輪4 1的前 部也配設彎曲部43，也能有效地抑制在從動鏈輪4 1側 台階滾子3 5的速度不穩，使從動鏈輪4 1的旋轉速度穩 化，可更有效地抑制台階34所產生的振動，而且’對 使輸送帶裝置31反轉運轉的情形也能對應。 的 的 件 動 台 的 出 3 5 件 的 台 34 驅 帶 穩 於 xu.r m 的 定 於 -17 - (11 ) (11 )200400912 此處’針對吸收如以上的台階滾子3 5的速度不穩的 彎曲部4 3，參照第3圖以及第4圖更詳細地說明。 因使用圓形的驅動鏈輪3 9驅動直線移動的台階滾子 3 5的影響’在各台階滾子3 5產生如第3 ( a )圖所示的移 動速度的速度不穩。即若令驅動鏈輪3 9的節距圓速度 (圓速度）爲V t ’則在各台階滾子3 5會發生像在由v t 一旦減速後增速返回到V t的速度不穩。此處，若令台階 滾子35的平均速度爲Vo，則各台階滾子35在台階導軌 33上位於第3(b)圖所示的位置時，其移動速度變成 V t，一邊由該位置逐漸地減速，一邊在驅動鏈輪3 9側僅 前進預定距離成爲第3 ( c )圖所示的位置時，各台階滾 子35的移動速度變成平均速度Vo。 如此，若令各台階滾子3 5的移動速度由V t減速變成 Vo的位置爲基準位置的話，彎曲部43係如第3 ( d )圖 所示在沿著台階導軌33存在複數個的基準位置之中’在 最接近驅動鏈輪3 9的基準位置與由此基準位置更朝驅動 鏈輪3 9側前進僅台階鏈3 7的鏈環鏈帶長r份的位置的驅 動鏈輪3 9上的驅動起點之間，以如使台階導軌3 3突出於 台階34側的山型的曲線形狀而配設。此處，驅動鏈輪39 上的驅動起點係指台階滾子3 5被驅動鏈輪3 9以節距圓速 度Vt進行進給動作的起點。而且，由台階鏈37連結的各 台階滾子35之中藉由某台階滾子35沿著彎曲部43的齒 線形狀移動其高度位置變化’先行於此台階滾子35的台 階滾子3 5的速度不穩被此高度位置的變化吸收’速度不 -18 - (12) (12)200400912 穩無法被傳達到後續的台階滾子35 ’可維持後續的台階 滾子35的移動速度於平均速度Vo。 如以上，彎曲部43具有防止通過此彎曲部43的台階 滾子35之後的台階滾子35的速度不穩的功能。在適用本 發明的輸送帶裝置3 1中，因在沿著台階導軌33存在複數 個的基準位置之中，位於最接近配設於輸送帶裝置31的 出口 3 1 b側的驅動鏈輪3 9的基準位置，與驅動鏈輪3 9上 的驅動起點之間的台階導軌33的部位配設彎曲部43，故 在遍及由輸送帶裝置31的入口 31a到出口 31b的大致全 區域中可大致保持台階滾子35的移動速度於一定，可有 效地抑制台階3 4的振動。 其次，針對彎齒部43的最佳形狀參.照第4圖來說 明。 超過彎曲部43朝驅動鏈輪39側移動的台階滾子35 藉由在驅動鏈輪39上的驅動起點咬合於驅動鏈輪3 9，使 其移動速度與驅動鏈輪3 9的節距圓速度V t相等。如此， 藉由在驅動起點咬合於驅動鏈輪39，此處方便上稱移動 速度爲Vt的台階滾子35爲鏈輪滾子（spr0Cket roller) 3 5 a。而且，由此鏈輪滾子3 5 a夾著彎曲部4 3在台階導軌 33的前段側（輸送帶裝置31的入口 31a側）第二個台階 滾子3 5藉由接鄰於鏈輪滾子3 5 a的台階滾子3 5 b沿著彎 曲部43移動，而以一定速度（平均速度Vo)移動。如 此，由此鏈輪滾子3 5 a夾著彎曲部4 3在台階導軌3 3的前 段側第二個，此處方便上稱一定速度被期待的台階滾子 (13) (13) 200400912 35爲一定速度滾子35c。 此時’這些各台階滾子35a、35b、35c在移動一節距 份時，令由鏈輪滾子3 5 a的中心以台階鏈3 7的鏈環鏈帶 長r爲半徑描硝的函C1，與由—定速度滾子35c的中心 以台階鏈3 7的鏈環鏈帶長r爲半徑描繪的圓C 2的交點 P 1所追蹤的軌跡爲滾子中心軌跡L的話，彎曲部4 3係形 成仿照此滾子中心軌跡L的形狀較佳。 藉由如以上設定彎曲部4 3的形狀，在鏈輪滾子 35a與一定速度滾子35c之間的台階滾子35b通過彎曲部 43的過程中’在鏈輪滾子35a所發生的速度不穩理論上 完全被依照彎曲部4 3的形狀的台階滾子3 5 b的高度位置 的變化吸收，使一定速度滾子35c的移動速度被正確地保 持於一定速度（平均速度Vo )。 此處’假設驅動鏈輪3 9的齒數爲16片，台階鏈3 7 的鏈環鏈帶長爲1 3 5 m m的情形，若以仿照上述中心軌跡 L的形狀形成彎曲部43的話，依照本發明者的試算，彎 曲部4 3的高低差距台階導軌3 3的頂面僅1. 5 3 m m。 如以上’在適用本發明的輸送帶裝置31中，藉由在 位於最接近驅動鏈輪3 9的基準位置與驅動鏈輪3 9上的驅 動起點之間的台階導軌33的部位以仿照上述中心軌跡l 的形狀形成彎曲部4 3，由台階鏈3 7連結的台階滾子3 5 通過此彎曲部4 3 ’使通過彎曲部4 3的台階滾子3 5之後 的台階滾子35的移動速度爲一定，可有效地抑制台階34 的振動’可確保良好的乘坐感覺。而且，彎曲部4 3的高 -20 - (14) 200400912 低差如上述極微小’故可小型化構造物3 2實現輸 置3 1全體的薄型化。 而且’以上係針對用以正確地保持通過彎曲部 台階滾子3 5之後的台階滾子3 5的移動速度於一 (平均速度Vo )的情形來說明，惟對於在台階滾5 許微小的速度不穩（V 〇 - r ω s i η ( ω t + 0 ))的情开多 成彎曲部43爲比高低差還少的形狀。此外，此處 速度，t爲時間，0爲相位差。 即藉由在驅動起點咬合於驅動鏈輪3 9令移動 Vt的台階滾子35爲鏈輪滾子35a，由此鏈輪滾子 著彎曲部4 3在驅動鏈輪3 9的前段側（輸送帶裝預 入口 3 1 a側）第二個台階滾子3 5，令藉由接鄰於 子35a的台階滾子35b沿著彎曲部43移動，被抑 小的速度不穩（V 〇 - r ω s i η ( ω t + 0 ))被期待的台 35爲略一定速度滾子35c。此時’這些各台階滾子 35b、35c在移動一節距份時，令由鏈輪滾子 35a 以台階鏈3 7的鏈環鏈帶長r爲半徑描繪的圓C1， —定速度滾子35c的中心以台階鏈37的鏈環鏈帶 半徑描繪的圓C2的交點P1所追蹤的軌跡爲滾子 跡L的話，藉由形成彎曲部4 3爲仿照此滾子中心 的形狀形成彎齒部43的話，可更減少彎曲部43 差，可抑制通過彎曲部43的台階滾子35之後的台 3 5的速度不穩於容許的範圍內。 如以上，對於在台階滚子3 5谷6午微小的速度 送帶裝 43的 定速度 匕35容 也能形 ω爲角 速度爲 35a夾 ΐ 31的 鏈輪滾 制於微 階滾子 35a、 的中心 與由略 長r爲 中心軌 軌跡L 的高低 階滾子 不穩的 -21 - (15) (15)200400912 情形’可更減少彎曲部4 3的高低差的份在謀求輸送帶裝 置3 1全體的薄型化上有利。 此處，針對如以上構成的輸送帶裝置3 1的動作來說 明。 首先，若成爲鏈驅動機構的驅動源的驅動馬達3 8被 啓動的話，驅動鏈輪3 9接受此驅動馬達3 8的驅動力而旋 轉，藉由此驅動鏈輪3 9的旋轉，使驅動馬達3 8的驅動力 傳達到台階鏈3 7。若台階鏈3 7被驅動的話，藉由此台階 鏈37連結的複數個台階34的各台階滾子35沿著台階導 軌3 3循環移動。 此時，藉由此台階鏈37連結的各台階滾子35之中接 近驅動鏈輪39的台階滾子35在咬合於驅動鏈輪39的過 程中移動速度發生速度不穩。但是，此速度不穩所產生的 台階滾子35之後的台階滾子35藉由通過配設於台階導軌 33的驅動鏈輪3?側的前端部的彎曲部43，使通過此彎曲 部43的台階滾子35之後的台階滾子35的速度不穩被抑 制。 若著眼於藉由台階鏈3 7連結的各台階滾子3 5之中互 相接鄰的三個台階滾子3 5 a、3 5 b ' 3 5 c而詳細說明的話’ 首先若前頭的台階滾子35 a到達驅動鏈輪3 9上的驅動起 點的話，此前頭的台階滾子3 5 a的移動速度成爲達驅動鏈 輪39的節距画速度Vt。此時第二個台階滾子35b若到達 配設於台階導軌3 3的驅動鏈輪3 9側的前端部的彎曲部 43，則第二個台階滾子35b沿著其彎曲部43 —邊使其高 -22- (16) (16)200400912 度位置變化一邊移動。 若第二個台階滾子35 b的高度位置變化，則因各台階 滾子3 5間的節距（鏈環鏈帶長）爲一定，故第三個台階 滾子35c接近前頭的台階滾子35a僅第二個台階滾子35b 的高度位置的變化份，第三個台階滾子35c被增速。據 此，台階滾子3 5 b的移動速度的降低份被台階滾子3 5 c的 增速份相抵，台階滾子35c的移動速度被維持於平均速度 Vo。 此處，若考慮假設未配設有彎曲部43的情形，則前 頭的台階滾子3 5 a更往前前進時，第二個台階滾子3 5 b的 移動速度反轉應比平均速度Vo還快。此時，在適用本發 明的輸送帶裝置3 1中，因用以使第二個台階滾子35b超 過配設於台階導軌3 3的驅動鏈輪3 9側的前端部的彎曲部 43，故第二個台階滾子35b的高度位置返回到原來，第三 個台階滾子35c自前頭的台階滚子35a分離，第三個台階 滾子35c被減速。據此，第二個台階滾子35b的移動速度 的上升份被第三個台階滾子3 5 c的減速份相抵，第三個台 階滾子35c的移動速度被維持於平均速度Vo。 而且，此時雖然在台階鏈37藉由上述鏈緊張機構賦 予預定的張力，惟因第三個台階滾子35c藉由按壓構件 45防止凸起，故第二個台階滾子35b沿著彎曲部43使其 高度位置變化時，第三個台階滾子35c被適當地增速或減 速，使第三個台階滾子3 5 c的移動速度確實地被維持於平 均速度V 〇。 -23 - (17) (17)200400912 而且’如上述除了位於台階導軌3 3的去程側的驅動 鏈輪3 9側的前端部外’對於在位於台階導軌3 3的回歸側 的驅動鏈輪3 9側的前端部也配設彎曲部4 3的情形’即使 是使輸送帶裝置3 1反轉運轉的情形也能有效地抑制台階 滾子3 5的速度不穩。再者，對於在位於輸送帶裝置3 1的 入口 3 1 a側的可動軌條3 3 c的去程側以及位於回歸側的從 動鏈輪4 1側的前端部也配設彎曲部4 3的情形’也能有效 地抑制在從動鏈輪41側的台階滾子35的速度不穩。 如以上，在適用本發明的輸送帶裝置3 1中，因台階 滾子35咬入於驅動鏈輪39的影響使在台階滾子35所發 生的速度不穩被配設於台階導軌33的彎曲部43吸收，台 階滾子3 5以一定速度移動，故有效地抑制台階3 4的振 動，可確保良好的乘坐感覺。 而且，因配設於台階導軌3 3的彎曲部43無須那麼大 的高低差，故可小型化構造物32實現輸送帶裝置3 1全體 的薄型化。特別是對於在彎曲部43下流的台階滾子35容 許微小的速度不穩的情形，因可更減小彎曲部4 3的高低 差，故可令輸送帶裝置31全體爲更薄型者。 此外，以上說明的輸送帶裝置3 1爲顯示本發明的具 體的適用例者，在不脫離本發明的要旨的範圍中種種的變 形爲可能。例如在上述輸送帶裝置3 1中，雖然在驅動鏈 輪3 9與從動鏈輪41之間懸掛台階鏈3 7，惟如第5圖所 示’取代從動鏈輪41使用形成略U字形的可動軌條5 1， 用以在驅動鏈輪3 9與可動軌條5 1之間懸掛台階鏈3 7抱 -24 - (18) 200400912 可以。此第5圖所示的輸送帶裝置50因以上的特徵 外被作成與上述輸送帶裝置3 1同樣的構成，故關於 述輸送帶裝置3 1同樣的構成，圖中附加同一符號省 明。 可動軌條5 1係懸掛有台階鏈3 7的部分被作成與 鏈輪3 9略同徑的圓形部。而且，在其外周對接藉由 鏈3 7連結的各台階滾子3 5，以導引台階滾子3 5 動。而且，此可動軌條51與上述輸送帶裝置31中的 鏈輪4 1 —樣，藉由鏈緊張機構的彈簧構件42增強作 由驅動鏈輪3 9分離的方向，用以對台階鏈3 7賦予最 張力。 這種可動軌條51若在台階滾子3 5發生速度不 話’有因其影響在接近分離驅動鏈輪39的方向振動 形。因此，對於使用這種可動軌條51的情形，在此 軌條5 1的去程側以及回歸側配設上述彎曲部43較佳 此’若用以在可動軌條5 1的去程側以及回歸側配設 部4 3的話，在此可動軌條51側的台階滚子3 5的速 穩可有效地被抑制，除了在台階34所產生的振動外 軌條5 1的振動也有效地抑制，可使輸送帶裝置5 0的 感覺爲極良好者。而且，藉由在可動軌條51的去程 及回歸側的雙方配設彎曲部43，對使輸送帶裝置50 運轉的情彤也能對應。 此外，以上係針對適用本發明於對路面略水平地 運送乘客的移動步道的例子來說明，惟本發明對跨越 點以 與上 略說 驅動 台階 的移 從動 用於 佳的 穩的 的情 可動 。如 彎曲 度不 可動 乘坐 側以 反轉 設置 建築 -25 - (19) (19)200400912 物的上下層設置運送乘客的自動階梯也能有效地適用。 在自動階梯通常對一個台階對應台階鏈3 7的複數個 節距’每一各台階常配設有複數個台階滾子3 5。因此， 在自動階梯中如第6圖所示與移動步道比較有驅動鏈輪 3 9的齒數多的傾向。適用本發明於這種自動階梯，對於 在對台階導軌3 3的驅動鏈輪3 9的導入部配設彎曲部4 3 的情形’與適用本發明於上述移動步道的情形一樣，可有 效地抑制台階34的振動可確保良好的乘坐感覺。而且， 對於適用本發明於這種自動階梯的情形，起因於台階滾子 3 5沿著彎曲部4 3而舉起，也發生對台階滾子3 5的驅動 鏈輪3 9的咬合差的問題。 〔產業上的可利用性〕 如果依照與本發明有關的輸送帶裝置，因在台階滾子 所發生的移動速度的速度不穩被配設於位於最接近驅動鏈 輪的基準位置與驅動鏈輪上的驅動起點之間的台階導軌的 部位的山型的彎曲部吸收’使速度不穩不被傳達到位於此 彎曲部的下流的台階滾子，故大致維持台階滾子的移動速 度在平均速度，可抑制起因於台階滾子的速度不穩的台階 的振動，可確保良好的乘坐感覺。 而且，藉由配設高低差小的彎曲部於台階導軌，因可 吸收台階滾子的移動速度的速度不穩，故可確保良好的乘 坐感覺，同時可實現裝置全體的薄型化。 -26- (20) (20)200400912 [圖式簡單說明】 第1圖是擴大顯示習知的輸送帶裝置的鏈驅動機構的 主要部位的圖。 第2圖是顯示適用本發明的輸送帶裝置的一例的全體 構成圖。 第3圖是在前述輸送帶裝置中，說明台階滾子的移動 速度與其位置關係的圖’ （a )是顯示依照台階滾子的位 置的移動速度的變化圖，（b )是顯示台階滾子的移動速 度爲成爲驅動鏈輪的節距圓速度V t的位置的圖，（c )是 顯示台階滾子的移動速度成爲平均速度Vo的位置的圖， (d )是顯示彎曲部的較佳形成位置的圖。 第4圖是在則述輸送帶裝置中，說Η月彎曲部的最佳形 狀的模式圖。 第5圖是顯示適用本發明的輸送帶裝置的其他例的全 體構成圖。 第6圖是顯示適用本發明於自動階梯的情形的主要部 位的模式圖。 【符號說明】 31、50:輸送帶裝置 3 1 a :入口 31b:出口 3 2 :構造物 3 3 :台階導軌 -27 - (21) (21)200400912 3 3 a :軌條本體 3 3 b :按壓軌條 — 33c:可動軌條 - 3 4 :台階 3 5、3 5 b、3 5 c :台階滾子 3 5 a :鏈輪滾子 3 6 :梳板 3 7 :台階鏈 _ 3 8 :驅動馬達 3 9 :驅動鏈輪 40:驅動鏈 4 1 :從動鏈輪 42:彈簧構件 4 3 : 彎曲部 — 44:凹部 45:按壓構件 _ 5 1 :可動軌條 1 0 1:台階滾子 1 0 2 :台階導軌 102a、 104a:支持面 1-0 3 :驅動鏈輪 1 0 3 a :切線 104:補償軌條 ho:間隔 -28- (22) (22)200400912200400912 (1) 发明. Description of the invention [Technical field to which the invention belongs] The present invention relates to a conveyor device such as an automatic step or a moving walkway. [Prior Art] A conveyor device such as an escalator or a moving walkway includes a plurality of steps provided with step rollers. The plurality of steps are 'made integral with this step chain' by step rollers arranged at each step and connected by endless step keys at a predetermined pitch, and are driven by the step driving mechanism by the step chain so that all The steps are configured to move synchronously without a gap. Furthermore, 'the plurality of steps are engaged with a step guide (g u i d e r a i 1) provided on the structure by step rollers and are supported by the step guide' to circulate between the entrance and the exit. In addition, since a plurality of steps are generally moved horizontally on a moving walkway, there are also cases where the steps are called pedals, but in this description, the case of moving a walkway is also used as a step to uniformly mark the chain driving mechanism that drives the step chain. A form in which the turning end of the step chain is wound around the rotating driving sprocket when the driving force of the driving motor is received, and the driving force of the motor is transmitted to the step chain through the driving sprocket is common. Such a chain drive mechanism is usually arranged inside a structure called a truss (t r s s) near the entrance or exit of the conveyor device. However, a truss equipped with a chain driving mechanism has conventionally required a sufficient space for installation work. However, in recent years, due to the development of mounting technology, the truss has been miniaturized, and the overall thickness of the conveyor belt device has been reduced. (2) (2) 200400912 The attempt was made. As described above, when the truss is miniaturized, a drive sprocket of a chain drive mechanism arranged inside the truss needs to use a small-diameter sprocket. However, when the sprocket with a small diameter is used as the drive sprocket of the chain drive mechanism, the step roller connected to the step chain will have a large speed instability. The speed instability of this step roller becomes the vibration of the step. It appears that a problem occurs that the riding feeling of the conveyor device is reduced. A technique for smoothing the movement of the step in order to suppress the instability of the speed of the step roller is proposed, for example, in Japanese Patent Application Laid-Open No. 8-2 1 7 3 6. Here, the technology disclosed in Japanese Patent Application Laid-Open No. 8-217368 supports the supporting surface (moving rail) 102a of the step guide 102 of the step roller 102 connected by the step chain 1 0 0 as shown in FIG. 1. The relative positional relationship between the step guide 102 and the drive sprocket 103 is set at a position ho apart from the tangent line 103a of the drive sprocket 103. A compensation rail 104 is disposed on the front end side of the drive sprocket 103 near the step guide 102. This compensation rail 1 〇4 system is made to support the step roller 1 〇1 support surface (moving track) 1 〇4 a on the step guide 1 〇2 side and this step guide i 0 2 support surface 1 0 2 a equal The height is equal to the height of the groove engaged by the step roller 101 of the drive sprocket 103 on the drive sprocket i 03 side, and the middle portion is formed into a smooth curved shape. In addition, the supporting surface 1 〇4 of the compensating rail 1 〇 4 a supports the moving step roller 〇 〇 1 is linearly engaged in the groove of the drive sprocket 103 by curved movement, and is accompanied by the drive chain The rotation and rotation of the wheel 103 causes the speed instability of the step roller 10x to be suppressed. However, in the above-mentioned conventional technology, although the step roll 2234 -9- (3) (3) 200400912 can be effectively suppressed, the speed of the sub 101 is unstable, but the step guide 102 is set to a high position due to the drive sprocket 103 Therefore, there is a disadvantage in that the thickness of the entire conveyor device is reduced. That is, the interval ho between the tangent line 103a of the driving sprocket 103 and the supporting surface i02a of the step guide rail 102 becomes 値 proportional to the length of the chain link of the step chain 100, especially for small When a sprocket with a diameter is used as the drive sprocket 103, the length of the chain link of the step chain 100 of the drive sprocket 103 becomes relatively large. As a result, the tangent line 1 of the drive sprocket 103 The interval ho between 3 a and the support surface 10 2 a of the step guide 102 is increased. As a result, the truss becomes large, which impedes the overall thin conveyor belt device. In addition, if it is also considered that the conveyor device is reversely operated on the return and return paths, since the return side of the step guide 102 needs to be separated at the same interval 10 and arranged below the drive sprocket 103, the upper and lower The interval (2x ho) requires a considerable height dimension. Suppose the driving sprocket 103 is 3 48. The number of teeth with a pitch circle of 4mm is 8 pieces, and the chain length of the step chain 100 is 1 33. In the case of 3 mm, in order to completely eliminate the instability of the speed of the step roller 100 in the above-mentioned conventional technology, the tangent line 103a of the driving sprocket 103 and the support surface 102a of the step guide 102 were tested by the inventor's trial. The interval ho needs 35. 3mm or more. Moreover, if the combination of the return side and the return side is added, the size of the driving sprocket 103 also needs 70. Extra height dimensions of 6mm (2 X ho). As a result, the pitch of the driving sprocket 10 3 is reduced and the circle diameter is reduced to 3 48. Space saving effect caused by 4 mm. (4) (4) 200400912 [Summary of the Invention] The present invention is made in view of the facts as described above, and the purpose thereof is to provide effective suppression of the speed instability of the step roller to ensure a good riding feeling, and It is possible to reduce the thickness of the entire conveyor device. The conveyor belt device related to the present invention includes: a step guide; a plurality of steps having a step roller moving along the step guide; a step chain connecting the step rollers of the plurality of steps with a predetermined pitch; A rotary driving device generated by a driving force for moving the step in a predetermined direction; and a driving sprocket that rotates in response to the driving force of the rotary driving device and transmits the driving force of the rotary driving device to the step chain, so that the driving chain When the round speed of the wheel is Vt, the average speed of the step roller connected to the step chain is Vo, and when the speed of the step roller is reduced from Vt to Vo as a reference position, it exists along the step guide Among the plurality of reference positions, the step guide is located between a reference position closest to the driving sprocket and a driving start point on the driving sprocket having a long portion of the chain link belt separating the step chain from the reference position. A mountain-shaped bent portion protruding from the stage is disposed at the portion. When the rotary drive device is activated in this conveyor, the driving sprocket rotates in response to the driving force of the rotary drive device, and the driving force of the rotary drive device is transmitted to the step chain by the rotation of the drive sprocket. If the step -11-(5) (5) 200400912 chain is driven, the step rollers of the plurality of steps connected by the step chain are cyclically moved along the step guide, and passengers on the steps are transported. Here, if we look at the three step rollers next to each other among the step rollers connected by the step chain, the front step roller approaches the drive sprocket when it exceeds the predetermined position (reference position). The roller moves at a slower speed than the average speed. At this time, 'If the second step roller reaches the starting point of the drive which is arranged at the reference position closest to the driving sprocket and the driving sprocket (the starting point of the step roller's feed operation at the circular speed vt by the driving sprocket) If the point of the stepped chain is separated from the point of the stepped chain by the point closest to the reference position of the drive sprocket, the link on the drive sprocket is separated from the step of the step by the mountain-shaped bend. 'The height of the second step roller will change. If the height position of the second step roller changes, the pitch (chain link length) between the step rollers is constant, so the third step roller that is close to the front step roller is only the second step roller. The variation of the height position of the step roller makes the third step roller be accelerated. Accordingly, the decrease in the moving speed of the front step roller is offset by the increase in the speed of the third step roller, and the moving speed of the third step roller is maintained at an average speed. If the step roller in front is moved forward, the movement speed of the step roller in front will be reversed to become faster than the average speed. At this time, if the second step roller exceeds the curved portion provided on the step guide, the height position of the second step roller returns to the original 'the third step roller is separated from the front step roller, and the third The step rollers are slowed down. According to this, the increase in the moving speed of the front step roller is offset by the deceleration of the third step roller -12-(6) 200400912 Pin 'the third step roller's moving speed is maintained at an average speed as above 'In the conveyor device according to the present invention, the mountain-type curved portion located at the step guide rail closest to the reference position of the drive sprocket and the point on the drive sprocket absorbs the leading rollers. The speed is unstable, so that the speed of the previous step roller is transmitted to the subsequent step roller, so the movement of the step roller is maintained at an average speed, and the vibration caused by the unstable speed of the step roller can be suppressed. Ride feeling. Moreover, since the mountain shape provided in the step bending portion need not be so large, it is advantageous in realizing the entire device. [Embodiment] An embodiment of the present invention will be described below with reference to the drawings. The overall configuration of the conveyor device to which the present invention is applied is shown schematically in FIG. 2. The conveyor device 31 shown in FIG. 2 is a moving walkway that is slightly installed on the road surface and transports passengers, and includes a structure 32 called a truss that supports the load of itself and passengers. This structure 32 is accommodated in a pit recessed below the road surface. Inside the structure 32, the entrance 3 exit 3 lb of the conveyor belt device 31 is swiveled, and a step guide 33 is provided. This step guide guides the movement of a plurality of steps 3 4 carrying passengers. That is, step rollers 3 5 are respectively provided in a plurality of 3 4 'by this step rollers 3 5 are moved along the guide rail 33' so that each step 34 is cycled through 3 1 a and exit 3 of the conveyor device 31 mobile. Equipped with moving steps, stable and stable speed steps, the shape of the rails is higher than the first level, so it is 1a and 3, and 3 is a step: step 'entrance -13- 乂: ‘-W. ft (7) (7) 200400912 step rail 3 3 is provided with a rail body 3 3 a having a support surface on the outbound side and a pressing rail 3 3 b ° disposed on the return side, and is 'moved on the outbound side' The step 3 4 is supported on the supporting surface of the rail body 3 3 a by the step roller 3 5 so that the step surface is approximately exposed to the outside of the structure 32 at the same height position as the road surface and from the entrance 31a toward the exit 31b toward the first. The direction of arrow A in Figure 2 moves in parallel. In addition, a comb plate (comb p 1 ate) 3 6 with a comb (COmb) mounted at the front end is disposed near the entrance 3 1 a and the exit 3 1b on the outbound side, and the step 3 4 is moved to the comb plate 3 6 Below. Further, the step 3 4 moving on the return side is returned from the entrance 3 1 a toward the exit 3 1 b in a state where the step roller 35 is engaged between the rail body 3 3 a and the rail 3 3 b. Furthermore, a movable rail 33c is provided on the side of the entrance 3 1 a of the rail body 3 3 a so as to be movable in a direction separated from the rail body 3 3 a. A plurality of steps 3 4 are provided at each step. The step rollers 34 of 34 are connected to each other by an endless step chain 37 at a predetermined pitch, so as to be integral with the step chain 37. Further, in a state where the step rollers 35 of each step 34 are abutted to the step guide 33, the step chain 37 is driven by the chain drive mechanism so that each step 34 is guided by the step guide 3 3 at the entrance 3 1 without a gap. Move between a and exit 3 1 b. The chain drive mechanism receives the driving force of the driving motor 38 and winds the turning portion of the step chain 37 around the rotating driving sprocket 39, and transmits the driving force of the driving motor 38 to the step chain 3 via the driving sprocket 39. 7 construction. A drive motor 38 serving as a drive source is disposed inside the structure 32, and is connected to a drive pinion 39 via a drive chain 40. 39-position drive sprocket (8) (8) 200400912 is located on the exit 3 1 b side of the conveyor belt device 3 and is rotatably arranged inside the structure 32 to receive the driving force of the drive motor 38 and rotate to The driving force of the driving motor 38 is transmitted to the step chain 37. That is, the driving sprocket 3 9 is engaged with the stepped rollers 3 5 connected by the stepped chain 3 7 between the adjacent teeth and teeth, and receives the driving force of the driving motor 38 at a predetermined circular speed ( The pitch circle speed) rotates to feed the step chain 37 and the step roller 35 connected to the step chain 37. In the conveyor belt device 3 1 'to which the present invention is applied, a small-diameter sprocket having about 16 teeth is used as the drive sprocket 39. By using such a small-sized sprocket as the driving sprocket 39, the structure 32 can be miniaturized and the overall thickness of the conveyor device 31 can be reduced. This can achieve space saving. Further, a driven sprocket that is driven by the driving sprocket 39 and rotates with the driven sprocket 39 is arranged on the entrance 3 1 a side of the conveyor device 31, and the driven sprocket is moved together with the driving sprocket 39 to feed the step chain 37. 4 1. The driven sprocket 41 is formed to have a diameter substantially the same as that of the driving sprocket 39, and is rotatably disposed inside the structure 32. Furthermore, the driven sprocket 41 suspends the step chain 37 throughout the driving sprocket 3 9 «This driven sprocket 4 1 is strengthened in the direction separated by the driving sprocket 3 9 by the spring member 4 2 of the chain tensioning mechanism 'To give the best tension to the step chain 37. Further, when the step chain 37 is stretched, 'the driven sprocket 41 receives the reinforcing force generated by the spring member 42 of the chain tension mechanism' moves within a predetermined range to the driving sprocket 3 9 The direction of separation 'prevents slack in the step chain 37. In addition, the movable rail 3 3 c of the above-mentioned step guide 3 3 receives the enhanced force generated by the spring of the chain tension mechanism when the driven sprocket 41 moves-15-(9) (9) 200400912 spring member 42 and The driven sprocket 41 moves in a direction separated by the driving sprocket 39 in conjunction with it. However, 'the step roller 3 5 which moves along the step guide 3 3 is connected by the step chain 37, and is shifted by the linear movement imitating the step guide 3 3 to the curve following the driving sprocket 39, due to occlusion. Due to the influence of the driving sprocket 39, speed instability occurs at its moving speed. The speed instability caused by the step rollers 3 5 is more significant as the diameter of the drive sprocket 39 is smaller, and this is a factor that causes vibrations at the steps 34 to reduce the riding feeling of the conveyor device 31. Therefore, in the conveyor belt device 31 to which the present invention is applied, the front end portion of the step guide 33 is specifically provided with an absorption step at the introduction position of the drive sprocket 39 on the outbound side of the rail body 3 3a, for example. The mountain-shaped bent portion 43 for the speed of the roller 35 is unstable. Here, the introduction portion to the drive sprocket 39 refers to an area (position) where the step sprocket 39 is transferred by the step guide 33 to the drive sprocket 39. Further, in this conveyor device 31, the front end portion of the drive sprocket 39 on the return side of the step guide 33 or the outbound side of the movable rail 3 3c and the driven sprocket 4 on the return side Similarly, the front end portion on one side is similarly provided with a mountain-shaped bent portion 43 for absorbing the speed instability of the step roller 35. The step roller 35 follows the trajectory of the shape of the curved portion 43 so as to pass through a portion where the curved portion 43 is provided. Further, at the positions facing the curved portions 43, the step rollers 35 are appropriately moved along the curved portions 43 and recessed portions 44 are respectively provided. Further, it is arranged at a position facing the front section (side of the entrance 3 1 a) of the curved portion 4 3 of the drive sprocket -16-(10) 200400912 3 9 arranged near the outbound side of the rail body 33a. A pressing mechanism 45 is provided to prevent the preceding step roller 35 from protruding from the subsequent step roller 35 due to the influence of the bending portion 43. The pressing member 45 is arranged below the comb plate 36 and abuts on the upper end portion of the step roller 35 moved near the driving sprocket 39 to prevent the step roller 35 from protruding. Furthermore, it is similarly disposed at a position 'facing the rear section (side of the port 3 1 b) of the curved portion 43 of the curved portion 43 arranged near the driven sprocket 41 of the movable rail 3 3 c on the outbound side. The upper end portion of the step roller is abutted against the pressing mechanism of the step roller 35 to prevent the protrusion of the step roller 35 45 °. The curved portion 43 as above is provided at least to the drive sprocket 39 of the travel side of the rail body 33a. If it is introduced, it can effectively absorb the instability of the step roller 35 and smooth the movement. It can effectively suppress the vibration generated by the step. By moving the sprocket 3 9 on the return side of the step guide 3 3 A curved portion 43 is also provided at the front end portion, and even when the conveying device 31 is rotated in the reverse direction, the movement of the step roller 35 can be smoothed, and the vibration generated by the step 34 can be effectively suppressed. In addition, although the driven sprocket 41 has a tendency to be unstable due to the influence of the speed of the step roller 35, the forward and return sides of the movable rail 3 3c are in place. The front portion of the driven sprocket 41 is also provided with a bending portion 43, which can effectively suppress the speed of the step roller 35 on the driven sprocket 41 side and cause the rotation speed of the driven sprocket 41. The stabilization can more effectively suppress the vibration generated by the step 34, and can also cope with the case where the conveyor device 31 is rotated in the reverse direction. The output of the moving platform is 3, 5 and the 34 drive belt is stable at xu. The value of r m is set to -17-(11) (11) 200400912. Here, the curved portion 4 3 that is unstable in speed absorption of the step roller 35 as described above will be described in more detail with reference to FIGS. 3 and 4. The influence of the use of a circular drive sprocket 39 to drive the linearly moving step rollers 35 'causes each step roller 35 to have a speed instability as shown in FIG. 3 (a). That is, if the pitch circular speed (circle speed) of the driving sprocket 39 is V t ′, the rollers 35 at each step will appear to be unstable in speed after returning to V t after decelerating from v t. Here, if the average speed of the step rollers 35 is Vo, when each step roller 35 is located on the step guide 33 at the position shown in FIG. 3 (b), its moving speed becomes V t and the position is changed from this position. When gradually decelerating and moving only a predetermined distance on the driving sprocket 39 side to the position shown in FIG. 3 (c), the moving speed of each step roller 35 becomes the average speed Vo. In this way, if the moving speed of each step roller 35 is decelerated from V t to the position of Vo as the reference position, as shown in FIG. 3 (d), the bending portion 43 has a plurality of references along the step guide 33. Among the positions, the driving sprocket 3 9 is located at the reference position closest to the driving sprocket 3 9 and the reference position is further advanced toward the driving sprocket 3 9 side only by the step chain 3 7 The upper driving starting points are arranged in a mountain-like curved shape such that the step guide 33 protrudes beyond the step 34 side. Here, the driving start point on the driving sprocket 39 refers to the starting point at which the step roller 35 is driven by the driven sprocket 39 at a pitch circular velocity Vt. In addition, among the step rollers 35 connected by the step chain 37, a certain step roller 35 moves along the tooth line shape of the curved portion 43 and its height position changes. 'Step rollers that precede this step roller 35. 5 The speed instability is absorbed by the change in this height position. 'Speed is not -18-(12) (12) 200400912 Stability cannot be transmitted to the subsequent step roller 35' can maintain the subsequent step roller 35's moving speed to the average speed Vo. As described above, the curved portion 43 has a function of preventing the speed of the step roller 35 following the step roller 35 passing through the curved portion 43 from being unstable. In the conveyor belt device 31 to which the present invention is applied, the drive sprocket 3 9 located closest to the exit 3 1 b side of the conveyor belt device 31 among a plurality of reference positions along the step guide 33. The reference position of the step is provided with the curved portion 43 at the position of the step guide 33 between the driving start point on the driving sprocket 39, and it can be maintained substantially in the entire area from the entrance 31a to the exit 31b of the conveyor device 31 The moving speed of the step roller 35 is constant, and the vibration of the step 34 can be effectively suppressed. Secondly, for the optimal shape parameters of the curved portion 43. This is illustrated in Figure 4. The step roller 35 moving beyond the curved portion 43 toward the driving sprocket 39 is engaged with the driving sprocket 39 by the driving start point on the driving sprocket 39 so that its moving speed is equal to the pitch circular speed of the driving sprocket 39. V t is equal. In this way, by engaging the driving sprocket 39 at the driving start point, the step roller 35 with a moving speed of Vt is conveniently referred to herein as a spr roller 3 5 a. In addition, the sprocket roller 3 5 a sandwiches the curved portion 4 3 on the front side of the step guide 33 (the entrance 31a side of the conveyor belt device 31), and the second step roller 3 5 is rolled adjacent to the sprocket. The step roller 3 5 b of the roller 3 5 a moves along the curved portion 43 and moves at a constant speed (average speed Vo). In this way, the sprocket roller 3 5 a is the second step on the front side of the step guide 3 3 with the curved portion 4 3 interposed therebetween. Here, the step roller (13) (13) 200400912 35 which is expected to have a constant speed is conveniently referred to herein. Roller 35c for a certain speed. At this time, when these step rollers 35a, 35b, and 35c move a distance, let the center of the sprocket roller 3 5 a take the length of the chain link of the step chain 3 7 as the radius C1. If the trajectory tracked by the intersection point P 1 with the circle C 2 drawn by the center of the constant-speed roller 35c with the chain link length r of the step chain 37 is the roller center trajectory L, the curved portion 4 3 It is better to form a shape that mimics this roller center locus L. By setting the shape of the curved portion 43 as above, the step roller 35b between the sprocket roller 35a and the constant speed roller 35c passes through the curved portion 43 while the speed occurring at the sprocket roller 35a does not change. In theory, the stability is completely absorbed by the change in the height position of the step roller 3 5 b according to the shape of the curved portion 43, so that the moving speed of the constant-speed roller 35 c is accurately maintained at a constant speed (average speed Vo). Here, assuming that the number of teeth of the driving sprocket 39 is 16 and the length of the chain link of the step chain 37 is 1 35 mm, if the curved portion 43 is formed in a shape that imitates the above-mentioned central locus L, according to this The inventor's trial calculation, the top surface of the step 4 3 of the curved portion 4 3 is only 1. 5 3 m m. As described above, in the conveyor device 31 to which the present invention is applied, the above-mentioned center is modeled by the position of the step guide 33 between the reference position closest to the driving sprocket 39 and the driving start point on the driving sprocket 39. The shape of the trajectory l forms a curved portion 4 3, and the step rollers 3 5 connected by the step chain 3 7 pass through this curved portion 4 3 ′ to move the step roller 35 after the step roller 35 passing through the curved portion 4 3. To be constant, the vibration of the step 34 can be effectively suppressed, and a good riding feeling can be ensured. Further, the height of the bent portion 43 is -20-(14) 200400912. The difference in height is extremely small as described above, so that the structure 3 2 can be miniaturized, and the entire thickness of the output 31 1 can be reduced. Furthermore, the above description is for a case where the moving speed of the step roller 35 after the step roller 35 passing through the curved portion is kept at one (average speed Vo). The instability (V 0-r ω si η (ω t + 0)) is more likely that the curved portion 43 has a shape smaller than the step. In addition, here, t is time and 0 is phase difference. That is, by engaging the driving sprocket 39 at the driving start point, the step roller 35 that moves Vt is the sprocket roller 35a, so that the sprocket roller touches the curved portion 4 3 on the front side of the driving sprocket 39 With the pre-inlet 3 1 a side), the second step roller 35 is used to move the step roller 35b adjacent to the roller 35a along the curved portion 43 and the speed is reduced and unstable (V 0-r The stage 35 where ω si η (ω t + 0)) is expected is a roller 35c having a slightly constant speed. At this time, when these step rollers 35b and 35c move a distance, the circle C1 drawn by the sprocket roller 35a with the length r of the chain link of the step chain 37 is set to a constant speed roller 35c. If the locus traced by the intersection point P1 of the circle C2 drawn by the chain link chain radius of the step chain 37 is the roller trace L, the curved portion 43 is formed to follow the shape of the roller center to form the bent portion 43. In this case, the difference in the bending portion 43 can be further reduced, and the speed instability of the stage 35 after the step roller 35 passing through the bending portion 43 can be suppressed to be within an allowable range. As mentioned above, the fixed-speed dagger 35 with a small speed of 43 at the step roller 3 5 valley 6 o'clock can also be shaped as ω with an angular velocity 35a and a sprocket 31 rolled on the micro-step roller 35a, -21-(15) (15) 200400912 in which the center and the high- and low-order rollers with a slightly longer r as the center track trajectory L can reduce the height difference of the curved portion 4 3 in the conveyor belt device 3 1 The overall thickness is advantageous. Here, the operation of the belt device 31 configured as described above will be described. First, if the drive motor 38, which is the driving source of the chain drive mechanism, is started, the drive sprocket 39 is rotated by receiving the driving force of the drive motor 38, and the drive motor is driven by the rotation of the sprocket 39 The driving force of 3 8 is transmitted to the step chain 37. When the step chain 37 is driven, each step roller 35 of the plurality of steps 34 connected by the step chain 37 moves cyclically along the step guide 33. At this time, among the step rollers 35 connected by the step chain 37, the step roller 35 which is close to the driving sprocket 39 has an unstable speed of movement during the engagement with the driving sprocket 39. However, the step roller 35 following the step roller 35 caused by this speed instability passes the curved portion 43 of the front end portion of the driving sprocket 3? Side disposed on the step guide 33, The speed instability of the step roller 35 after the step roller 35 is suppressed. If we focus on the three step rollers 3 5 a and 3 5 b next to each other among the step rollers 3 5 connected by the step chain 3 7 'First, if the front step roller When the roller 35 a reaches the driving start point on the driving sprocket 39, the moving speed of the step roller 35 a before it becomes the pitch drawing speed Vt of the driving sprocket 39. At this time, if the second step roller 35b reaches the curved portion 43 of the front end portion disposed on the drive sprocket 39 side of the step guide 33, the second step roller 35b follows the curved portion 43. Its height is -22- (16) (16) 200400912 while changing position while moving. If the height position of the second step roller 35 b changes, the pitch (chain link length) between each step roller 35 is constant, so the third step roller 35c is close to the front step roller 35a only changes the height position of the second step roller 35b, and the third step roller 35c is increased in speed. Accordingly, the decrease in the moving speed of the step roller 3 5 b is offset by the increasing speed of the step roller 3 5 c, and the moving speed of the step roller 35 c is maintained at the average speed Vo. Here, if it is assumed that the curved portion 43 is not provided, when the step roller 3 5 a at the front moves forward, the moving speed of the second step roller 3 5 b should be reversed from the average speed Vo. It's fast. At this time, in the conveyor device 31 to which the present invention is applied, the second step roller 35b exceeds the curved portion 43 on the front end portion of the drive sprocket 39 on the step guide 33, so that The height position of the second step roller 35b is returned to the original, the third step roller 35c is separated from the front step roller 35a, and the third step roller 35c is decelerated. Accordingly, the increase in the moving speed of the second step roller 35b is offset by the deceleration of the third step roller 35c, and the moving speed of the third step roller 35c is maintained at the average speed Vo. Moreover, at this time, although the predetermined tension is given to the step chain 37 by the above-mentioned chain tensioning mechanism, the third step roller 35c is prevented from protruding by the pressing member 45, so the second step roller 35b follows the curved portion When the height position is changed, the third step roller 35c is appropriately accelerated or decelerated, so that the moving speed of the third step roller 35c is surely maintained at the average speed Vo. -23-(17) (17) 200400912 and 'except for the front end portion of the drive sprocket 39 on the outbound side of the step guide 33 as described above' for the drive sprocket on the return side of the step guide 33 In the case where a curved portion 4 3 is also provided at the front end portion on the 3 9 side ', even when the belt device 31 is rotated in the reverse direction, the speed instability of the step roller 35 can be effectively suppressed. Further, a curved portion 4 3 is also provided on the front end portion of the movable rail 3 3 c on the entrance 3 1 a side of the conveyor device 31 and on the driven sprocket 41 1 side on the return side. In the case of ', the speed instability of the step roller 35 on the driven sprocket 41 side can also be effectively suppressed. As described above, in the conveyor device 31 to which the present invention is applied, the speed instability occurring in the step roller 35 is affected by the step roller 35 biting in the drive sprocket 39, and the step guide 33 is bent. The portion 43 absorbs and the step roller 35 moves at a constant speed, so the vibration of the step 34 is effectively suppressed, and a good riding feeling can be ensured. In addition, since the bent portion 43 disposed on the step guide 33 does not need to have such a large level difference, the structure 32 can be miniaturized and the overall thickness of the conveyor belt device 31 can be reduced. In particular, in the case where the step roller 35 downstream of the curved portion 43 allows slight speed instability, the height difference of the curved portion 43 can be further reduced, so that the entire conveyor device 31 can be made thinner. The conveyor device 31 described above is a specific application example of the present invention, and various modifications are possible without departing from the gist of the present invention. For example, in the above-mentioned conveyor belt device 31, although a step chain 37 is suspended between the driving sprocket 39 and the driven sprocket 41, as shown in FIG. 5, 'U-shaped sprocket 41 is used instead of the driven sprocket 41. The movable rail 51 is used to suspend the step chain 3 7 between the driving sprocket 39 and the movable rail 51. 24-(18) 200400912 Yes. The conveyor belt device 50 shown in FIG. 5 has the same configuration as the above-mentioned conveyor belt device 31 except for the above-mentioned features. Therefore, the same structures as those of the conveyor belt device 31 are denoted by the same reference numerals in the drawings. A portion of the movable rail 5 1 where the step chain 37 is suspended is formed as a circular portion having a diameter approximately the same as that of the sprocket 39. Further, the step rollers 35 connected by the chain 37 are butted on the outer periphery thereof to guide the step rollers 3 5 to move. In addition, the movable rail 51 is the same as the sprocket 4 1 in the above-mentioned conveyor belt device 31, and is strengthened by the spring member 42 of the chain tensioning mechanism in a direction separated by the driving sprocket 39, for the step chain 3 7 Gives the most tension. If such a movable rail 51 has a speed at the step roller 35, it has a vibration shape in the direction approaching the separation drive sprocket 39 due to its influence. Therefore, for the case where such a movable rail 51 is used, it is preferable to arrange the above-mentioned curved portion 43 on the outbound side and the return side of this rail 51, and if it is used on the outbound side of the movable rail 51 and If the return side arrangement portion 4 3 is provided, the speed stability of the step roller 35 on the movable rail 51 side can be effectively suppressed, and the vibration of the rail 5 1 can be effectively suppressed in addition to the vibration generated by the step 34. , Can make the conveyor device 50 feel very good. In addition, by providing the bending portion 43 on both the outbound and return sides of the movable rail 51, it is possible to cope with the feeling of operating the conveyor device 50. In addition, the above is an explanation of an example where the present invention is applied to a moving trail that transports passengers on the road surface slightly horizontally. However, the present invention is applicable to a stable movement of a driving step that crosses a point with the above description. If the degree of curvature is immovable, the ride side is set upside down. -25-(19) (19) 200400912 An automatic ladder for transporting passengers can also be effectively applied. In an automatic step, one step corresponds to a plurality of pitches of the step chain 37, and each step is often provided with a plurality of step rollers 35. Therefore, as shown in FIG. 6, the number of teeth of the driving sprocket 39 is higher in the automatic step than in the moving path. When the present invention is applied to such an automatic step, the case where a curved portion 4 3 is provided in the introduction portion of the drive sprocket 39 of the step guide 33 is similar to the case where the present invention is applied to the above-mentioned moving walkway, and can be effectively suppressed. The vibration of the step 34 can ensure a good riding feeling. Furthermore, in a case where the present invention is applied to such an automatic step, the step roller 35 is lifted along the curved portion 43, and the problem of poor meshing of the drive sprocket 39 of the step roller 35 also occurs. . [Industrial Applicability] According to the belt device according to the present invention, the speed of the moving speed caused by the step roller is unstable, and it is disposed at the reference position closest to the driving sprocket and the driving sprocket. The mountain-shaped curved portion of the step guide between the driving start points absorbs the 'instability of speed and is not transmitted to the downstream step roller located at this curved portion, so the moving speed of the step roller is generally maintained at an average speed It can suppress the vibration of the step caused by the unstable speed of the step roller, and can ensure a good riding feeling. In addition, since the curved portion having a small height difference is provided on the step guide, the speed at which the moving speed of the step roller can be absorbed is unstable, so that a good sitting feeling can be ensured, and the overall thickness of the device can be reduced. -26- (20) (20) 200400912 [Brief description of the drawings] Fig. 1 is an enlarged view showing a main part of a chain drive mechanism of a conventional conveyor belt device. Fig. 2 is an overall configuration diagram showing an example of a conveyor device to which the present invention is applied. FIG. 3 is a diagram illustrating the relationship between the moving speed of the step roller and its position in the aforementioned conveyor belt device. (A) is a diagram showing a change in the moving speed according to the position of the step roller, and (b) is a step roller (C) is a diagram showing a position where the moving speed of the step roller becomes the average speed Vo, and (d) is a diagram showing a preferred position of the curved portion. Figure of formation. Fig. 4 is a schematic view showing an optimal shape of the meniscus curved portion in the conveyor belt device. Fig. 5 is a diagram showing the overall configuration of another example of the conveyor device to which the present invention is applied. Fig. 6 is a schematic diagram showing the main parts in a case where the present invention is applied to an automatic step. [Description of symbols] 31, 50: Conveyor belt device 3 1 a: Entrance 31b: Exit 3 2: Structure 3 3: Step guide -27-(21) (21) 200400912 3 3 a: Rail body 3 3 b: Press rail — 33c: movable rail-3 4: step 3 5, 3, 5 b, 3 5 c: step roller 3 5 a: sprocket roller 3 6: comb plate 3 7: step chain _ 3 8: Drive motor 3 9: Drive sprocket 40: Drive chain 4 1: Driven sprocket 42: Spring member 4 3: Bending part — 44: Recess 45: Pressing member _ 5 1: Movable rail 1 0 1: Step roller 1 0 2: Step guide 102a, 104a: Support surface 1-0 3: Drive sprocket 1 0 3 a: Tangent line 104: Compensation rail ho: Interval -28- (22) (22) 200400912
Vo:平均速度 Vt:節距圓速度 -29 -Vo: average speed Vt: pitch circular speed -29-