201044098 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種適合應用在印表機、掃描機、印刷 機或影印機等之原稿壓合板之開闔的原稿壓合板開闔裝 置。 【先前技術】 一直以來’通稱為轉軸棒的原稿壓合板開闔裝置，特 別是作為影印機之原稿壓合板的開闔裝置，係廣泛地被使 用來作為未譟置原稿自動輪送裝置之原稿壓合板，或即使 有设置原稿自動輸送裝置’但重量較輕之原稿壓合板的開 闔裝置。如上述之原稿壓合板開闔裝置的構成，係經由組 裝在裝置本體側之組裝元件使組裝腳部垂下，而組裝腳部 係可裂卸地插人沿裝置本體上下方向設置的㈣孔，使原 稿壓合板相對於包含原稿壓合板開闔裝 置的裝置本體為 可裝卸的。當原稿為如書等厚原稿的情瞒，組裝腳部在 動’可使原懸合板以水平狀態覆蓋 稿的上面。如上述通稱為轉軸棒並作為原稿壓合板 開闔裝置，例如記載於 知技術。 載於日本特開2001-98839號公報係為習 筒狀的組裝腳丄:f:壓合板開闔裝置的構成是， 地插入沿著裝置本體後部组震元件係可裝卸 筒狀的_部•支 201044098 並藉由轉軸銷而為可轉動的。在上述組裝物件上，組裝腳 部内裝设有壓縮螺旋彈簧（coil spring)，支撐元件上爽壓 縮螺旋彈簧對向的位置設置有凸輪部，凸輪部與壓縮嫘旋 彈簧之間設置有滑塊，支撐元件的凸輪部對接於滑瑰。 近年來，由於影印機必須更進一步地降低成本，因此 即使有稱為轉轴棒的習知原稿壓合板開闔裝置，業界仍尋 求能進一步減少料件數以降低成本。又，印表機、掃描機 及印刷機等具有原稿壓合板的OA機器，同樣為了能大幅 降低成本，而尋求經由減少料件數來構成的簡單原稿壓合 板開闔裝置。 【發明内容】 本發明有鑒於上述情況，主要目的為提供一種矸減少 多餘的元件數使構造簡單，並可降低製造成本的原稿壓合 板開闔裝ϊ ° 為達成上述課題，本發明之原稿壓合板開闔裝置包括 組裝元件異有筒狀的組裴腳部，該組裝腳部設置有往中心 部軸方向上部開放的容納孔。支撐元件組裝於設置在該組 裝元件上部的兩侧板部，並介由轉軸銷為可轉動。轉動控 制手段設ί在該支撐元件與該㈣元件之間，具有：彈性 手段由容納在該沮裝腳部該容納孔内部的壓縮螺旋彈簧 所構成。—=置在對向於該_手段之該支撐元件上。 筒狀的彈簧朴組裝在該滾轴與該壓縮螺旋彈簧間並覆 蓋該壓縮嫘旎彈箸。 5 201044098 再者，本發明之該彈簧導桿係為組裝在該壓縮螺旋彈 簧上端部，並覆蓋該壓縮螺旋彈簧的外周緣及上端部的筒 狀物。 再者，本發明之該彈簧導桿係為組襞在該壓縮螺旋彈 簧上端部，覆蓋該壓縮螺旋彈簣的内側及上端部，並具有 凸緣部的筒狀物。 再者，本發明之該支撐元件與該彈簧導桿連接的部分 組裝有該滾軸。 再者，本發明該支撐元件與該彈簧導桿連接的部分組 裝有該滾轴。 再者，本發明該滾轴嵌入設置在該支撐元件兩側板部 之滾轴容納部’且軸方向的移動係被限制。 再者，本發明該轉動控制手段係為扭轉螺旋彈簧，其 容納在該容納孔内，彈性設置在該址裝元件與該支標元件 之間。 再者，本發明該轉動控制手段係為拉伸螺旋彈簧，其 容納在該容納孔内，張設在該組裝元件與該支撐元件之 間。 關^求項1〜5的各發明，經由下述構成··組裝元 件具，筒狀的組裝腳部，該組裝腳部設置有往中心部軸方 向上。P開放的容納孔。支撐元件組裝於設置在該組裝元件 上邛的兩侧板部’並介由轉軸銷為可轉動。轉動控制手段 設置在該支撐元件與該組裝元件之間，具有：彈性手段由 合納在該組裝腳部該容納孔内部的壓縮螺旋彈簀所構 201044098 成。滾軸設置在對向於該彈性手段之該支撐元件上。筒狀 的彈簧導桿組裝在該滾軸與該壓縮螺旋彈簧間並覆蓋該 壓縮螺旋彈簧。可提供一種減少元件數使構造簡單，並可 降低製造成本的原稿壓合板開闔裝置。 . 關於請求項6〜7的各發明，可更減少元件數使構造 簡單，並更進一步降低製造成本。 【實施方式】 〇 以下，以影印機的原稿壓合板開闔裝置來說明本發明 之實施例，但當本發明之原稿壓合板開闔裝置應用在除了 影印機以外的印表機、掃描機、印刷機等OA機器時，可 考慮原稿壓合板的重量、功能、構造來增加若干的設計變 更，或者亦可直接如本實施例的方式來實施。又，本實施 例亦可直接應用在，例如原稿壓合板以外之開闔體（例如 墨水匣容納部的蓋體等）的開闔裝置。在此情況下，原稿 n 壓合板開闔裝置即改稱為開闔體或蓋體開闔裝置。另外， 只要是具有本發明之開闔裝置的影印機、印表機、掃描機 或印刷機，皆可為本實施例之裝置本體。 在圖1及圖2中，元件符號1表示例如可稱為影像形 成裝置的影印機。影印機1由裝置本體2及原稿壓合板3 形成，本發明為用來將原稿（圖中未表示）壓合在裝置本 體2接觸玻璃（contact glass ) 4上的原稿壓合板開闔裝置 5，如圖1及圖2所示，原稿壓合板開闔裝置5以原稿壓 合板3後部對於裝置本體2的後部上端，且原稿壓合板3 201044098 可以開闔的方式連結。（圖1的A )且，原稿壓合板3可 分為兩種，連結或未連結圖示未表示之習知結構的原稿自 動輸送裝置。本發明之原稿壓合板開闔裝置，可適用於任 一種原稿壓合板，但較佳為應用於，較輕且未連結原稿自 動輸送裝置，而原稿壓合板之構成可藉由本身中間凹折等 方式對應處理厚原稿。 原稿壓合板開闔裝置5係由，如圖3至圖7所示，組 裝元件7、支撐元件10、滾轴（roller) 12、彈性手段14 以及筒狀彈簧導桿（spring guide ) 15所構成。組裝元件7 具有呈筒狀之組裝腳部6,支撐元件10介由轉轴銷9可轉 動地連接於設置在組裝元件7上部之兩側板部8、8，滾轴 12可轉動地連接於支撐元件10之搖動部11，彈性手段14 容置在沿組裝元件7組裝腳部6的中心部轴方向設置的容 納孔13,並彈性設置在容納孔13底部13a及滾轴12之間， 彈性手段14例如是由壓縮螺旋彈簧構成，彈簧導桿15覆 蓋並嵌合於彈性手段14上端部外側。 組裝元件7例如由POM (polyacetal)合成樹脂材料 所成型，全體呈具有段差的角狀，在上部設有呈平面角狀 的支撐元件容納部7a，而與支撐元件容納部7a連通，並 沿組裝腳部6中心部軸方向設置的容納孔Π剖面係呈圓 形。容納孔13的底部13a具有軸心部13b，轴心部13b如 圖5所示，嵌入彈性手段14的底部侧。在組裝元件7的 支撐元件容納部7a，設有讓轉轴銷9穿過的連結孔7b、7b。 因組裝腳部6如上所述為具有段差的物件，由於不具有升 201044098 降功能’較習知的長度為短，而其上端側具有組裝孔6b 並設有組裴片6a。再者，在組裝元件7上，兩側板部8、8 的各一端部設有共有的擋部8a。 轉軸銷9，如圖4所示，具有凸緣部9a。轉軸銷9係 利用頭部加工的碳鋼線製物件，以支撐元件1〇可對於組 裝元件7轉動的方式連接後，並經由緊接轉軸銷9端部’ 如後述’使組裝元件7及支撐元件10之間緊密連接並產 生摩擦力矩（friction torque )，來使組裝元件7與支樓組件 10連結。 支稽'元件10例如由POM ( polyacetal)合成樹脂材料 所成型，轉軸銷9的連結孔l〇a設置在其間，支撐元件1〇 一邊設有支撐部l〇b，另一邊設有搖動部11。支撐元件1〇 兩側部連結孔l〇a的周緣，設有剖面呈圓形的轴心部10c、 10c (圖示僅顯示一側）。在搖動部11的搖動前端侧，設有 剖面呈半圓形的滾軸容納部Ha。在滾軸容納部lla的兩 側端部’設有滾軸嚙合部11C、He，滾軸嚙合部He、11c 設有較滚軸容納部11a小徑的半圓嚙合部lib、lib。支撐 部l〇b設有組裝至原稿壓合板3後端部的嚙合溝部1〇d、 l〇e，以及組裝螺絲的螺絲孔i〇f等。又，在支撐部1〇b的 後端部側設有限位部1 〇g。 滾軸12例如為易切削鋼（free cutting steel)製的圓棒 狀物件’滚軸12的兩端部具有較其中央部12a小徑的嚙合 部12b、12b，藉由將中央部12a容納至滾轴容納部lla内， 並將嚙合部12b、12b嵌入至滚軸嚙合片11c、lie的半圓 9 201044098 嚙合部lib、lib ,使滚軸12可自由轉動並限制其左右方 向的移動。再者，雖期望滾軸12可轉動，但經由塗布具 潤滑性的潤滑油（grease)至滾軸12與彈簧導桿15的接 觸面，以促進其潤滑度使滚軸12不轉動的構成亦可。 構成彈性手段14的壓縮螺旋彈簧，例如可為習知 SWP-B製的物件，對應原稿壓合板3的重量及重心 口 節其彈力。 @ 彈簧導桿15例如為不鏽鋼製材料作成的筒狀物件， 具有周緣部15a及上表面部15b，並以帽狀方式覆蓋 性手段14的上端部。 接著’轉動控制手段17在本實施例中係由彈性手段 !4、滾軸I2、彈簧導桿ls所構成。彈性手段Μ由容納 組裝腳部6容納孔14内部的壓縮螺旋彈簧所構成，滾軸 12設置在對向於彈性手段Η之支撐元件1G上，彈簧導= 15組裝在滾車由12與彈性手段14間並覆蓋彈性手段μ。 孔因性手段14容納於設置在組裝聊部6的容納 的段14的上端部覆蓋彈簧導桿15，滾軸12 、央部容納於設置在支撐元件1〇搖 :::在一b，丧入半圓响合部二： 孔Jb、動部U減插人支撐元件容㈣7a，連結 7b、7b盘、連結孔1〇3對準’將轉轴銷9插入該等連結孔 ” 1〇a連結後，經由固接轉軸銷9 合板開闔裝詈S沾化壯—丄、 1原&塵 护 、、、，裝元成。此時，軸心部10c、l〇c與支 牙谷、、内部7 a内壁之間，可任意的產生摩擦力矩，或者 201044098 介由其他摩擦元件來產生摩擦力矩的構成亦可。又，不產 生摩擦力矩的構成亦可。 如上述組裝方式之本發明的原稿壓合板開闔裝置5, 如圖1所示，通常具有一對，支撐元件10的後端部組裝 至原稿壓合板3的後端部下表面後，如圖2所示，將組裝 元件7的組裝腳部6，插入設置在裝置本體2後部上端的 組裝孔2a、2a (圖中僅顯示一邊），組裝片6a並藉由組裝 螺絲16來螺絲鎖固，以使原稿壓合板3組裝後可對於裝 ^ 置本體2開闔。 接著，說明關於本發明之原稿壓合板開闔裝置5的作 用方式。如上所述之原稿壓合板3組裝至裝置本體2，且 原稿壓合板3為閉闔的狀態下，轉動控制手段17的滾軸 12，如圖5所示，位於彈簧導桿15的一侧，因此經由彈 性手段14的彈力驅使支撐元件10往原稿壓合板3的閉闔 方向轉動，原稿壓合板3藉由本身的重量與彈性手段14 Q 的彈力，往接觸玻璃4上壓闔。更進一步，在此，彈性手 段14的有效長度亦可設定為，讓彈性手段14的彈力不作 用在滾軸12上。在這種情況下，原稿壓合板3僅藉由其 本身的重量保持閉闔狀態。 在原稿壓合板3的閉闔狀態下，為了在接觸玻璃4上 放置原稿，必須對原稿壓合板3進行開啟。藉由以轉軸銷 9為支點轉動的支撐元件10，使構成搖動部11之轉動控 制手段17的滾軸12介由彈簧導桿15略微推壓彈性手段 14，滾軸12並在彈簧導桿15上表面滑動移動，如圖6所 11 201044098 不，虽原柄歷合板3相對於接觸玻璃4，即裝置本體 ，呈8。的開啟角度時，因彈性手段Η的t心作用線與2轉 軸鎖9及滾軸12的令心線在同一線上，支撐元件⑺ 不淪哪個方向都不會被驅使轉動的狀態。再者，開啟原^ 壓合板3時，經由彈性手段14使驅動方向反轉:驅使= 稿壓合板3往開啟方向運動，如圖7所示，開啟到支撐部 觸的限位部H)g對接至組裝元件7的播部％。又， 開啟角度並非限定。接著，因開啟的原稿壓合板3處於被 驅使往開啟方向的狀態，原稿壓合板3可保持不會往 方向自然落下的開啟狀態。在本實施例中，此開啟角度約 為50。，而50〇的開啟角度並非限定。 又'、、 接著，關已開啟的原稿壓合板3時，在到達略8。的 開啟角度之前，彈性手段14介由滾軸12受到減時所產 生的阻力，到達略8。時，轉軸鎖9、滚轴12的中心線以及 彈性手段14的作用$心線—致以後，彈性手段14經由滾 軸12作用往_方向的按壓彈力至上方的原觀合板％ 原稿壓合板3經由本身的重量及彈性手段14的驅動力而 自動地關閉。 如上述說明’關於本實施例1的原稿壓合板開闔裝置 L經由轉動控制手段17，介由支撐元件1G的轉動控制， j稿壓合板3處於_狀態，可保持原稿壓合板3位於 ^定的閉闔狀態’而不會產生漂浮的現象，而因預設的開 闔角度’在驅使原稿壓合板3往開啟方向運動時，支撐元 件可在全開啟角度時敎的支撐原稿壓合板3，且當原 12 201044098 稿壓合板3的閉闔操作時，可控制原稿壓合板3不會劇烈 地關閉。又’藉由滾軸12的設置’在開闔操作重量特別 輕的原稿壓合板3時，可增加搖動部u與彈簧導桿15之 間的滑度，以產生開闔操作更為平穩的效果。 ® 8及圖9所示為關於本發明之原稿壓合板開閣裝置 其他實施例。關於本實施例2的原稿壓合板開闔裝置2〇， 僅彈簧導桿23與實施例1不同，其他皆與實施例i相同， 其中彈貫矛干23係覆蓋在由壓縮螺旋彈簧所形成的彈性 〇 手段22上，而彈性手段22則構成轉動控制手段21。關於 本實施例2之彈簧導桿23係具有SUS製呈筒狀的本體部 23a，而本體部23a上端具有凸緣部23b。本體部23a的外 徑與彈性手段22的内徑配合，以使本體部23a嵌入彈性手 段22的内侧，並使凸緣部23b覆蓋在彈性手段22的上端 部。 圖10及圖11所示為關於本發明之原稿壓合板開闔裝 置其他實施例。關於本實施例3的原稿壓合板開闔裝置 25,轉動控制手段31係由扭轉螺旋彈簧構成的彈性手段 29所構成’而彈性手段29容納在容納孔26a内，並設置 在組裝元件26與支撐元件27之間。再者，彈性手段29 的一端部29a拾扣於設置在組裝元件26的連接部26b，另 一端部29b則拴扣於設置在支撐元件27的拴扣孔27a。 關於本實施例3的原稿壓合板開闔裝置25,構成轉動 控制手段3卜由扭轉螺旋彈簧構成之彈性手段29的力矩， 經由適宜地選定，可保持原稿壓合板30的閉闔狀態穩定， 13 201044098 防止原稿壓合板30漂浮。而由預設開啟角度產生的掀起 問題，可利用設置在組裝元件26與支撐元件27之間的習 知結構如棘輪（click )手段、凸輪（cam )手段、阻力（friction ) 手段或嗜合手段等來防止。又，藉由彈性手段29的彈力， 在開啟原稿壓合板30時，可不感受到原稿壓合板30重量 進行開啟操作，亦可防止原稿壓合板30由開啟狀態自然 地落下。 如上所述的實施方式，可達成本發明的目的，經由更 少的元件數，以及簡單化的構成，提供單價更低的原稿壓 合板。 圖12〜圖14所示為關於本發明之原稿壓合板開闔裝 置其他實施例。關於本實施例4的原稿壓合板開闔裝置 35，轉動控制手段40係由拉伸螺旋彈簧構成的彈性手段 39所構成，而拉伸螺旋彈簧則與轉軸銷36連結，並可與 轉轴銷36相互轉動。拉伸螺旋彈簧拉伸設置在組裝元件 37與支撐元件38之間，且容納在容納孔37a内。彈性手 段39的一端部拴扣於設置在組裝元件37内的拴扣部 37b，另一端部39b拴扣於支撐元件38的拴扣長孔38a。 保持原稿壓合板41開啟位置的穩定，可經由彈性手段39 的另一端部3%在拴扣長孔38a内移動來達成，亦可經由 具有拴扣長孔38a，設置在組裝元件37與支撐元件38之 間的習知結構如棘輪（click)手段、凸輪（cam)手段、 阻力（friction )手段或响合手段等來達成。 如上所述的實施方式，可達成本發明的目的，經由更 14 201044098 少的元件數，以及簡單化的構成，提供單價更低的原稿壓 合板。 本發明因如上述的構成，可提供省略元件數平價的原 稿壓合板開闔裝置，以作為較輕之原稿壓合板的開闔物 件，亦可應用在如影印機、印表機、掃描機、印刷機等的 原稿壓合板開闔裝置。 【圖式簡單說明】 〇 圖1為應用本發明之原稿壓合板開闔裝置之影印機的 斜視圖； 圖2為顯示對於本發明之原稿壓合板開闔裝置之影印 機之組裝狀態的影印機一侧剖面圖； 圖3為本發明之原稿壓合板開闔裝置的侧面圖； 圖4為本發明之原稿壓合板開闔裝置的分解斜視圖； 圖5為本發明之原稿壓合板開闔裝置的侧剖面圖； q 圖6為說明本發明之原稿壓合板開闔裝置的動作方式 的侧剖面圖； 圖7為說明本發明之原稿壓合板開闔裝置的動作方式 的側剖面圖； 圖8為顯示本發明之原稿壓合板開闔裝置其他實施例 的分解斜視圖； 圖9為說明圖8之原稿壓合板開闔裝置的動作方式的 側剖面圖； 圖10為顯示本發明之原稿壓合板開闓裝置其他實施 15 201044098 例的分解斜視圖； 圖η為說明圖ίο 的側剖面圖； 之原稿壓合板_裝置的動作方式 開闔裝置其他實施 闔裝置的動作方式 圖12為顯示本發明之原稿壓合板 例的分解斜視圖； 圖13為說明圖12之原稿壓合板開 的侧剖面圖； 圖14為說明圖12之原稿壓合板開闔裝置的動作方式 的侧剖面圖。 【主要元件符號說明】 1 :影印機 2:裝置本體 3、41 :原稿壓合板 4:接觸玻璃 5 '20、25 ' 35 :原稿壓合板開闔裝置 6 .、组裝腳部 6a :組裝片 6b :組裝孔 7 ' 26、37 :組裝元件 7a .支撐元件容納部 7b、l〇a :連結孔 8 :板部 8a :擔部 9 ' 36 :轉軸銷 16 201044098 9a :凸緣部 10、27、38 :支撐元件 l〇b :支撐部 10c、13b :轴心部 10d、10e :嚙合溝部 10g :限位部 11 :搖動部 11a :滾軸容納部 O lib :半圓嚙合部 11c :滾軸嚙合部 12 :滾轴 12a :中央部 12b :嚙合部 13、26a、37a :容納孔 13a :底部 ❹ 14、22、29、39 :彈性手段 15、23 :彈簧導桿 15a:周緣部 15b :上表面部 16 :組裝螺絲 17、21、3卜40 :轉動控制手段 23a :本體部 23b :凸緣部 26b :連接部 17 201044098 27a :拴扣孔 29a、29b、39b :端部 37b :拴扣部 3 8 a :拾扣長孔BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an original plywood opening device suitable for use in opening of an original press panel of a printer, a scanner, a printer or a photocopier. [Prior Art] The original plywood opening device, which is commonly referred to as a rotating shaft bar, and particularly the opening device of the original plywood as a photocopier, is widely used as an original for an undistorted original automatic transfer device. Plywood, or the opening device of the original plywood that is lighter than the original automatic conveying device. In the above configuration, the document puncture plate opening device is configured such that the assembly leg is suspended by the assembly member assembled on the device body side, and the assembly leg portion is detachably inserted into the (four) hole provided in the vertical direction of the device body. The original plywood is detachable with respect to the apparatus body including the original plywood opening device. When the original is a thick original such as a book, the assembly foot is moved to make the original suspension plate cover the upper surface of the draft in a horizontal state. As described above, the shaft is generally referred to as a hinge plate opening device, and is described, for example, in the art. Japanese Laid-Open Patent Publication No. 2001-98839 is an assembly-shaped ankle of the shape of a cylinder: f: The structure of the plywood opening device is inserted into the rear of the device body. Support 201044098 and is rotatable by the rotating pin. In the assembled object, a compression coil spring is disposed in the assembly leg, and a cam portion is disposed at a position opposite to the cooling compression coil spring on the support member, and a slider is disposed between the cam portion and the compression dome spring. The cam portion of the support member abuts against the slide. In recent years, since the photocopier has to further reduce the cost, even if there is a conventional original plywood opening device called a reel rod, the industry is still seeking to further reduce the number of pieces to reduce the cost. Further, in an OA machine having a document pressing plate such as a printer, a scanner, and a printing machine, a simple document pressing plate opening device having a reduced number of pieces is sought in order to reduce the cost. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an original pressure plate of the present invention in which the number of components is reduced, the structure is simple, and the manufacturing cost is reduced. The plywood opening device includes a group leg portion in which the assembly member has a different cylindrical shape, and the assembly leg portion is provided with a receiving hole that is open to the upper portion in the axial direction of the center portion. The support member is assembled to the side plate portions provided at the upper portion of the assembly member, and is rotatable via the rotation shaft pin. The rotation control means is disposed between the support member and the (four) member, and has an elastic means formed by a compression coil spring housed inside the receiving hole of the dismembering foot. —= placed on the support element opposite the means. A cylindrical spring is assembled between the roller and the compression coil spring and covers the compression cartridge. 5 201044098 Further, the spring guide of the present invention is a cylindrical body assembled to the upper end portion of the compression coil spring and covering the outer peripheral edge and the upper end portion of the compression coil spring. Further, the spring guide of the present invention is a tubular body having a flange portion which is disposed at an upper end portion of the compression coil spring and covers an inner side and an upper end portion of the compression screw magazine. Further, the roller of the support member of the present invention which is coupled to the spring guide is assembled. Furthermore, the portion of the support member to which the support member of the present invention is coupled is provided with the roller. Further, in the present invention, the roller is fitted in the roller housing portion ' provided in the plate portions on both side portions of the support member, and the movement in the axial direction is restricted. Furthermore, the rotation control means of the present invention is a torsion coil spring housed in the receiving hole and elastically disposed between the address member and the branch member. Furthermore, the rotation control means of the present invention is a tension coil spring housed in the accommodating hole and stretched between the assembly member and the support member. According to each of the inventions of the first to fifth aspects, the tubular member is assembled via the following configuration, and the assembled leg portion is provided with the center portion in the axial direction. P open receiving hole. The support member is assembled to the side plate portions provided on the upper side of the assembly member and is rotatable via the spindle pin. The rotation control means is disposed between the support member and the assembly member, and has: the elastic means is formed by a compression screw magazine 201044098 which is integrated in the accommodation hole of the assembly leg. The roller is disposed on the support member opposite the resilient means. A cylindrical spring guide rod is assembled between the roller and the compression coil spring and covers the compression coil spring. It is possible to provide an original plywood opening device which reduces the number of components, makes the construction simple, and can reduce the manufacturing cost. With regard to each of the inventions of claims 6 to 7, the number of components can be further reduced, the structure can be simplified, and the manufacturing cost can be further reduced. [Embodiment] Hereinafter, an embodiment of the present invention will be described with a document pressing plate opening device of a photocopier, but when the original plate opening device of the present invention is applied to a printer or a scanner other than a photocopier, In the case of an OA machine such as a printing machine, a number of design changes may be added in consideration of the weight, function, and structure of the original pressure plate, or may be directly implemented as in the embodiment. Further, the present embodiment can be directly applied to, for example, an opening device of an opening body (e.g., a lid of an ink cartridge housing portion) other than the original pressing plate. In this case, the original n ply opening device is referred to as an opening or a cover opening device. Further, as long as it is a photocopier, a printer, a scanner or a printer having the opening device of the present invention, it can be the apparatus body of the present embodiment. In Figs. 1 and 2, reference numeral 1 denotes a photocopier, which may be referred to as an image forming apparatus. The photocopier 1 is formed by the apparatus body 2 and the original plywood 3, and the present invention is an original plywood opening device 5 for pressing an original (not shown) on the contact glass 4 of the apparatus body 2, As shown in FIGS. 1 and 2, the original plywood opening device 5 is connected to the rear upper end of the apparatus main body 2 at the rear of the original plywood 3, and the original plywood 3 201044098 can be opened. (A of Fig. 1) Further, the original pressing plate 3 can be divided into two types, and the original automatic conveying device of the conventional structure not shown in the drawing is connected or unconnected. The original plywood opening device of the present invention can be applied to any type of original plywood, but is preferably applied to a lighter and unconnected original automatic conveying device, and the original plywood can be formed by itself. The method corresponds to processing thick originals. The original plywood opening device 5 is composed of an assembly member 7, a support member 10, a roller 12, an elastic means 14, and a spring guide 15 as shown in FIGS. 3 to 7. . The assembly member 7 has a cylindrical assembly leg 6 rotatably coupled to the side plate portions 8, 8 provided at the upper portion of the assembly member 7 via a pivot pin 9, and the roller 12 is rotatably coupled to the support The rocking portion 11 of the component 10 is accommodated in the receiving hole 13 disposed along the axial direction of the central portion of the assembling leg portion 6 of the assembling member 7, and is elastically disposed between the bottom portion 13a of the receiving hole 13 and the roller 12, and the elastic means 14 is constituted, for example, by a compression coil spring, and the spring guide 15 is covered and fitted to the outer side of the upper end portion of the elastic means 14. The assembly member 7 is formed, for example, of a POM (polyacetal) synthetic resin material, and has a horn having a stepped shape as a whole, and is provided with a support member accommodating portion 7a having a plane angle at the upper portion, and is in communication with the support member accommodating portion 7a, and is assembled along the assembly. The accommodating hole 设置 section provided in the axial direction of the center portion of the leg portion 6 has a circular shape. The bottom portion 13a of the accommodating hole 13 has a shaft center portion 13b which is fitted to the bottom side of the elastic means 14 as shown in Fig. 5. The support member accommodating portion 7a of the assembly member 7 is provided with coupling holes 7b, 7b through which the rotary shaft pin 9 passes. Since the assembly leg portion 6 is an object having a step as described above, since the function of the lowering function is shorter than the conventional one, the upper end side has the assembly hole 6b and the group crotch piece 6a is provided. Further, in the assembly member 7, the respective end portions of the side plate portions 8, 8 are provided with a common stopper portion 8a. The rotation pin 9, as shown in Fig. 4, has a flange portion 9a. The rotating pin 9 is made of a carbon steel wire workpiece processed by a head, and the supporting member 1 can be connected to the assembled component 7 and then assembled to the assembled component 7 and supported via the end portion of the rotating pin 9 as described later. The elements 10 are tightly coupled and a friction torque is generated to connect the assembly element 7 with the branch assembly 10. The component 10 is formed, for example, of a POM (polyacetal) synthetic resin material, and a connecting hole l〇a of the rotating shaft pin 9 is disposed therebetween, and the supporting member 1 is provided with a supporting portion 10b on one side and a rocking portion on the other side. 11. The support member 1A has a peripheral edge of the side connecting hole 10a, and is provided with axial portions 10c and 10c having a circular cross section (only one side is shown). On the side of the rocking end of the rocking portion 11, a roller housing portion Ha having a semicircular cross section is provided. Roller engaging portions 11C and He are provided at both end portions ' of the roller housing portion 11a, and the roller engaging portions He and 11c are provided with semicircular engaging portions lib and lib having smaller diameters than the roller housing portion 11a. The supporting portion 10b is provided with engaging groove portions 1〇d, l〇e assembled to the rear end portion of the original pressing plate 3, screw holes i〇f for assembling screws, and the like. Further, a stopper portion 1 〇g is provided on the rear end side of the support portion 1b. The roller 12 is, for example, a round bar-shaped member made of free cutting steel. The both ends of the roller 12 have meshing portions 12b and 12b having a smaller diameter than the central portion 12a, and the central portion 12a is accommodated therein. In the roller accommodating portion 11a, the engaging portions 12b and 12b are fitted into the semicircle 9 201044098 engaging portions lib and lib of the roller engaging pieces 11c and lie, so that the roller 12 can freely rotate and restrict the movement in the left-right direction. Further, although it is desirable that the roller 12 is rotatable, it is also possible to apply a lubricating lubricity to the contact surface of the roller 12 and the spring guide 15 to promote the degree of lubrication so that the roller 12 does not rotate. can. The compression coil spring constituting the elastic means 14 can be, for example, an article made of a conventional SWP-B, corresponding to the weight of the original platen 3 and the elastic force of the center of gravity. The spring guide bar 15 is, for example, a cylindrical member made of a stainless steel material, and has a peripheral edge portion 15a and an upper surface portion 15b, and covers the upper end portion of the means 14 in a hat-like manner. Next, the rotation control means 17 is constituted by the elastic means !4, the roller I2, and the spring guide ls in this embodiment. The elastic means 构成 is constituted by a compression coil spring accommodating the inside of the accommodating hole 6 accommodating hole 14, and the roller 12 is disposed on the supporting member 1G opposite to the elastic means ,, and the spring guide = 15 is assembled in the rolling by 12 and elastic means 14 rooms and covered with elastic means μ. The hole-inducing means 14 is accommodated in the upper end portion of the accommodating section 14 provided at the assembly portion 6 to cover the spring guide rod 15. The roller shaft 12 and the central portion are accommodated in the support member 1 and shaken::: in a b, mourning Into the semi-circular ringing part 2: Hole Jb, moving part U minus inserting support element capacity (4) 7a, connecting 7b, 7b disk, connecting hole 1〇3 alignment 'inserting pin 9 into these connecting holes' 1〇a link After that, the fixed shaft pin 9 is used to open the 詈 沾 沾 沾 沾 壮 丄 丄 1 1 1 1 1 1 1 1 1 1 1 1 1 1 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The frictional moment may be generated arbitrarily between the inner walls of the inner 7 a, or the friction torque may be generated by other friction elements in 201044098. Further, the friction torque may not be generated. The assembly method of the present invention is as described above. The original plywood opening device 5, as shown in Fig. 1, generally has a pair, and the rear end portion of the support member 10 is assembled to the lower surface of the rear end portion of the original plywood 3, as shown in Fig. 2, the assembly member 7 is assembled. The leg portion 6 is assembled, and the assembly holes 2a, 2a provided at the upper end of the rear portion of the apparatus body 2 are inserted (only one side is shown in the figure) The sheet 6a is assembled and screw-locked by assembling the screws 16 so that the original platen 3 can be assembled to be opened to the mounting body 2. Next, the mode of operation of the original plywood opening device 5 of the present invention will be described. When the original pressing plate 3 as described above is assembled to the apparatus body 2, and the original pressing plate 3 is closed, the roller 12 of the rotation control means 17, as shown in FIG. 5, is located on one side of the spring guide 15, Therefore, the elastic force of the elastic means 14 drives the support member 10 to rotate in the closing direction of the original pressing plate 3, and the original pressing plate 3 is pressed against the contact glass 4 by its own weight and the elastic force of the elastic means 14 Q. Further, Here, the effective length of the elastic means 14 can also be set such that the elastic force of the elastic means 14 does not act on the roller 12. In this case, the original pressing plate 3 is kept in a closed state only by its own weight. In the closed state of the original pressing plate 3, in order to place the original on the contact glass 4, the original pressing plate 3 must be opened. By the support member 10 pivoted with the rotating shaft pin 9 as a fulcrum, the rotation of the oscillating portion 11 is made. control The roller 12 of the manufacturing mechanism 17 slightly pushes the elastic means 14 through the spring guide rod 15, and the roller 12 slides on the upper surface of the spring guide rod 15, as shown in Fig. 6 11 201044098, although the original handle splicing plate 3 is opposite to When the contact glass 4, that is, the apparatus body, is at an opening angle of 8, the t-action line of the elastic means is on the same line as the center line of the two-axis lock 9 and the roller 12, and the support member (7) does not in any direction. The state of rotation is not driven. Further, when the original plywood 3 is opened, the driving direction is reversed via the elastic means 14: driving = the draft plate 3 is moved in the opening direction, as shown in Fig. 7, opening to the support portion The contact limit portion H)g is docked to the broadcast portion % of the assembly element 7. Also, the opening angle is not limited. Then, since the opened original pressing plate 3 is in a state of being driven to the opening direction, the original pressing plate 3 can be kept in an open state which does not naturally fall in the direction. In the present embodiment, this opening angle is about 50. , and the opening angle of 50 并非 is not limited. Further, ',, then, when the original document plate 3 that has been opened is closed, it is slightly equal to 8. Before the opening angle, the elastic means 14 reaches the resistance of 8 by the resistance generated by the reduction of the roller 12. At the same time, the shaft lock 9, the center line of the roller 12, and the action of the elastic means 14 are the core lines. After that, the elastic means 14 acts on the pressing force of the elastic direction 14 to the upper direction by the roller 12 to the upper original plate % original platen 3 It is automatically closed by its own weight and the driving force of the elastic means 14. As described above, the document pressing plate opening device L of the first embodiment is controlled by the rotation of the supporting member 1G via the rotation control means 17, and the j-press plate 3 is in the _ state, and the original pressing plate 3 can be held. The closed state ' does not cause a floating phenomenon, and the support member can support the original pressing plate 3 at the full opening angle when the original opening angle 3 is driven to move in the opening direction. And when the original 12 201044098 drafting plate 3 is closed, the original pressing plate 3 can be controlled not to be severely closed. Moreover, by the setting of the roller 12, when the original pressure plate 3 having a particularly light weight is operated, the slip between the rocking portion u and the spring guide 15 can be increased to produce a smoother opening operation. . ® 8 and Figure 9 show other embodiments of the original plywood opening device of the present invention. Regarding the original plate opening device 2 of the second embodiment, only the spring guide 23 is different from the first embodiment, and the other is the same as the embodiment i, wherein the projectile 23 is covered by the compression coil spring. The elastic means 22 and the elastic means 22 constitute the rotation control means 21. The spring guide 23 of the second embodiment has a cylindrical body portion 23a made of SUS, and the upper end portion of the main body portion 23a has a flange portion 23b. The outer diameter of the main body portion 23a is fitted to the inner diameter of the elastic means 22 such that the main body portion 23a is fitted inside the elastic hand 22, and the flange portion 23b is covered by the upper end portion of the elastic means 22. Fig. 10 and Fig. 11 show other embodiments of the original plywood opening device of the present invention. In the document puncture plate opening device 25 of the third embodiment, the rotation control means 31 is constituted by an elastic means 29 composed of a torsion coil spring, and the elastic means 29 is housed in the accommodating hole 26a, and is provided in the assembly member 26 and the support. Between elements 27. Further, the one end portion 29a of the elastic means 29 is picked up and attached to the connecting portion 26b provided in the assembling member 26, and the other end portion 29b is hooked to the hooking hole 27a provided in the supporting member 27. In the document pressing plate opening device 25 of the third embodiment, the torque of the elastic means 29 constituted by the torsion coil spring is constituted by the rotation control means 3, and the closed state of the original platen 30 can be kept stable by being appropriately selected. 201044098 Prevents the original plywood 30 from floating. The pick-up problem caused by the preset opening angle can utilize a conventional structure such as a ratcheting means, a cam means, a friction means or a hobby means provided between the assembly member 26 and the support member 27. Wait to prevent it. Further, by the elastic force of the elastic means 29, when the original pressing plate 30 is opened, the opening of the original pressing plate 30 can be prevented from being opened, and the original pressing plate 30 can be prevented from naturally falling from the open state. The embodiment as described above achieves the object of the invention, and provides a lower-priced original press plate via a smaller number of components and a simplified configuration. Fig. 12 through Fig. 14 show other embodiments of the original plywood opening device of the present invention. In the document pressing plate opening device 35 of the fourth embodiment, the rotation control means 40 is constituted by an elastic means 39 composed of a tension coil spring, and the tension coil spring is coupled to the rotation shaft pin 36, and is coupled to the rotation shaft pin. 36 rotates each other. The tension coil spring is stretched between the assembly member 37 and the support member 38 and housed in the accommodating hole 37a. One end portion of the elastic hand 39 is fastened to the snap portion 37b provided in the assembly member 37, and the other end portion 39b is fastened to the buckle long hole 38a of the support member 38. The stability of maintaining the open position of the original pressing plate 41 can be achieved by moving the other end portion 3% of the elastic means 39 in the long hole 38a of the buckle, or by providing the long hole 38a of the buckle, and the assembly member 37 and the supporting member. Conventional structures between 38 are achieved, such as by means of a click, a means of cam, a means of friction, or a means of ringing. According to the embodiment as described above, it is possible to achieve the object of the invention, and to provide a lower-priced original press plate by a smaller number of components, such as 2010-14098, and a simplified configuration. According to the present invention, it is possible to provide an original plywood opening device which omits the number of components, and is used as a stencil for a lighter original plywood, and can also be applied to, for example, a photocopier, a printer, a scanner, An original press plate opening device such as a printing machine. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a photocopier using the original plywood opening device of the present invention; FIG. 2 is a photocopying machine showing the assembled state of the photocopier for the original ply opening device of the present invention; Figure 3 is a side elevational view of the original ply opening device of the present invention; Figure 4 is an exploded perspective view of the original ply opening device of the present invention; Figure 5 is an original plywood opening device of the present invention; FIG. 6 is a side cross-sectional view showing the operation mode of the original plywood opening device of the present invention; FIG. 7 is a side cross-sectional view showing the operation mode of the original plywood opening device of the present invention; FIG. 9 is a side cross-sectional view showing the operation of the original plywood opening device of FIG. 8; FIG. 10 is a view showing the operation of the original plywood opening device of the present invention; Other implementations of the opening device 15 Exploded oblique view of the example of 201044098; Figure η is a side cross-sectional view illustrating the figure ίο; the original pressing plate _ device operation mode opening device other action of the device Figure 12 is an exploded perspective view showing an example of the original platen of the present invention; Figure 13 is a side sectional view showing the opening of the original plate of Figure 12; Figure 14 is a view showing the operation of the original plate opening device of Figure 12; Side profile view. [Description of main component symbols] 1 : Photocopier 2: Apparatus main body 3, 41: Original plywood 4: Contact glass 5 '20, 25 ' 35 : Original plywood opening device 6. Assembly foot 6a: Assembly piece 6b: assembly hole 7' 26, 37: assembly member 7a. support member accommodation portion 7b, l〇a: connection hole 8: plate portion 8a: shoulder portion 9' 36: rotation shaft pin 16 201044098 9a: flange portion 10, 27 38: support member 10b: support portions 10c, 13b: axial portion 10d, 10e: engagement groove portion 10g: stopper portion 11: rocking portion 11a: roller housing portion O lib : semi-circular mesh portion 11c: roller engagement Portion 12: Roller 12a: Center portion 12b: Engagement portions 13, 26a, 37a: accommodation hole 13a: bottom ❹ 14, 22, 29, 39: elastic means 15, 23: spring guide 15a: peripheral portion 15b: upper surface Part 16: Assembly screws 17, 21, 3b 40: rotation control means 23a: main body part 23b: flange part 26b: connection part 17 201044098 27a: 拴 button hole 29a, 29b, 39b: end part 37b: 拴 button part 3 8 a : Pick up long hole