1304022 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種事務機器，特別是指一種配合一 掃描單元可進行雙面掃描且可回復原稿順序的雙面送紙裝 置。 ^ 【先前技術】 • 如圖1所示，現有一種自動送紙裝置（美國專利第 5,784,680號案）’是裝設在一影像形成裝置1上，並包含一 ® 機殼單元2、一設置在該機殼單元2内部的第一通道3〇1、 一與該第一通道301對接的第二通道302、一設於該第二通 道302上方的翻面通道303、一彙集於該第二通道3〇2與該 翻面通道303外側的分流通道304、一對應該第一通道3〇1 的進紙滾輪組4、一設於該第一通道301中的第一搬運滾輪 組501、一設於該第二通道3〇2中的第二搬運滾輪組502、 一設置在該第二通道302與該翻面通道303之間的排紙滾 輪組6、一設置在該排紙滾輪組6外側的返送滾輪組7、一 ® 設置在該排紙滾輪組6與返送滾輪組7之間的切換爪8及 一設在該排紙滾輪組6内侧的迴轉單元9。該機殼單元2具 有呈上下間隔設置的一進紙托盤201、一上導引托盤202及 一下出紙托盤203。該切換爪8是可由一趨近於該分流通道 304的第一位置，切換成一遠離於該分流通道304的第二位 置。該迴轉單元9具有一圍設在該排紙滾輪組6内側且呈 彎弧形的迴轉曲道901，及一位在該迴轉曲道901，與該翻面 通道303銜接處的擋爪902’，該擋爪902’可由一使該翻面 1304022 通道303及分流通道304呈暢通的開放位置，切換成一阻 擋在該翻面通道303與分流通道304之間的阻擋位置。 當文件要進行雙面掃描，且由上而下依序地排放在該 進紙托盤201上時，一開始該切換爪8是保持在朝下（如 假想線所示）的位置，原本朝上的第一表面I受到一第一 感應器901的感應即可控制該進紙滾輪組4帶動，而被移 入該第一通道301中，並利用該第一搬運滚輪組5〇1之驅 動而經過一第二感應器902及該影像形成裝置i的一掃描 器窗口 101，利用該第二感應器9〇2連線控制啟動掃描的動 作。當文件的一第一表面I通過該掃描器窗口 1〇1後會再 受到該第一搬運滾輪組502及排紙滾輪組$的運送，就可 由第一通道302轉入分流通道304，並由該返送滾輪組7帶 動而朝該上導引托盤202產生局部移出（此時，該文件的 第一表面I已朝下，且一第二表面Ε則朝上）。 接著，當一第三感應器903感應到文件的一後端時， 或是當一第四感應器904延時感應文件的一後端已通過預 定長度時，隨即控制該返送滾輪組7反轉，並控制該切換 爪8向上擺動（如實線所示），且將通往該第二通道3〇2的 閘口予以封閉、促使該翻面通道3〇3保持暢通，此時，該 擔爪902位在開放位置（如實線所示），文件即可經由該排 紙滾輪組6且順著該翻面通道3〇3輸送，且繼續朝該第一 通道301輸送。 、*文件再經過第二感應器9G2感應時，可再連線控制 進行掃描的動作、控制該切換爪8向下擺動（如假想線所 1304022 不），且當文件之第二表面！！經過掃描器窗口 1〇1後，又再 利用該第二搬運滾輪組502、排紙滾輪組6之帶動，可再送 至該分流通道304 (此時，文件的第二表面n已朝下，且第 表面I則朝上）。 S该第二感應器903感應到文件的後端時，控制該返 送滾輪組7反轉，並控制該切換爪8向上擺動（如實線所 不）’且將通往該第二通道302的閘口予以封閉，又控制該 迴轉單元9的擋爪9〇2,向上擺動並阻擋在該翻面通道3〇3 的一開口（如假想線所示），則文件就會由該分流通道3〇4 ，並繞過迴轉曲道901，而輸送至該下出紙托盤2〇3中，此 時，文件的第一表面I已朝下，第二表面n則朝上，並可 由下朝上依序排放，且可保持掃描後的順序與原稿一致。 雖然，這種送紙裝置可完成雙面掃描，且掃描後的文 件順序與原稿一致，但仍具有下列缺失： 、這種送紙裝置為了達成掃描後的文件順序與原稿 一致，就必須設置擋爪902,、切換爪8以及用來控制擋爪 902’、切換爪8動作的驅動元件，使得整體之構件繁多、結 構複雜。 一、文件的第二表面Π經掃描後，會進入該返送滾輪 組7 ’再由該返送滾輪組7反轉經由該迴轉曲道9〇1，出紙， 此時’該翻面通道303及第一通道301的延伸長度必須大 於文件長度’否則文件的前、後端會在該返送滚輪組7產 生重疊’無法完成送紙。為了要避免上述情形，該翻面通 道303及第一通道301的延伸長度必須大於文件長度，則 1304022 整體的長度及體積也會較大。 【發明内容】 因此，本發明之目的，即在提供一種可完成雙面掃描 且掃描後文件的排序會與原稿一致之可回復原稿順序的雙 面送紙裝置。 於是，本發明可回復原稿順序的雙面送紙裝置，包含 一機殼單元及一切換單元。該機殼單元具有一運紙通道、 一为歧地與該運紙通道銜接的翻面通道、一連通該運紙通 道與翻面通道的分流通道及一位在該分流通道外側的迴轉 通道’該運紙通道具有一進紙端口、一與該進紙端口呈上 下没置的排紙端口及一介於該進紙端口與排紙端口間的掃 描區段，該翻面通道具有一對應該排紙端口的外侧端口及 一與該運紙通道銜接的内側端口，該分流通道趨近於該排 紙端口及外側端口，該迴轉通道呈彎弧狀，並具有一與該 排紙端口接通的第一端口及一與該分流通道匯集且接通在 該外側端口内側的第二端口。該切換單元具有一樞設在該 運紙通道與分流通道銜接處的切換爪、一安裝在該第一端 口與該運紙通道銜接處的第一切換片及一安裝在該第二端 口與該翻面通道銜接處的第二切換片，該切換爪在一第一 位置時，該掃描區段朝該分流通道呈暢通狀，該切換爪在 一第一位置時，可阻斷該掃描區段朝該分流通道暢通的路 徑且使該掃描區段朝該排紙端口呈暢通狀，該第一、二切 換片是以可撓性材質製成片狀，且該第一切換片是可由該 掃描區段朝該排紙端口被單向掣動地阻斷在該掃描區段與 1304022 該迴轉通道銜接處，且使該排紙端口朝第一 通狀，該第二切換片是可由該分流通道及該迴轉通道朝該 翻面通道被單向掣動地封阻在該第二端口上，且使該外側 端口朝内側端口常保持暢通狀。 藉此，利用該切換爪可在該第一、二位置之間切換， 以及該第一、二切換片呈可被單向掣動之作用，不僅可使 文件完成雙面掃描，且掃描後的文件排列順序與原稿可保 持一致，且結構簡化、不會增加整體體積。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 如圖2所示，是一組合示意圖，本發明可回復原稿順 序的雙面送紙裝置較佳實施例，是適用於裝設在一影像形 成裝置200 (例如影印機或掃描器）上，且可供具有一第一 面310及第一表面320的文件300達到自動輸送及雙 面掃描目的，該影像形成裝置2〇〇具有一掃描單元21〇。該 雙面送紙裝置包含一機殼單元1〇及安裝在該機殼單元1〇 内部的一進紙滚輪組2〇、一搬運滾輪組3〇、一排紙滚輪組 位在該排紙滾輪組4〇内側的切換單元5〇、一感應單 疋60、一中繼滾輪組％。 配合參閱圖3’為一局部放大示意圖，該機殼單元10 具有一概呈c形的運紙通道u、一分歧地銜接在該運紙通 道U —中段的翻面通道12、一連通該運紙通道u與該翻 l3〇4〇22 L C 12的分流通道丨3、一位在該分流通道13外側的迴 轉通道14、一位在該迴轉通道14外側的下出紙托盤15、 位在"亥下出紙托盤15上方的上出紙托盤16及一位在該 ^ 、氏托盤16上方且對應該運紙通道11的進紙托盤17。 該運紙通道11具有-進紙端口⑴、-與該進紙端口 m f上下設置的排紙端口 U2及一介於該進紙端口 lu與排紙 間的掃為區段113，該翻面通道12具有一對應該 、·氏鳊112的外側端口 121及一與該運紙通道丨丨銜接的 内側端口 122,該分流通道13趨近於該排紙端〇 ιΐ2及該 外側端口 121，並具有_與該運紙通道u銜接的引入端口 131及-與該翻面通道12銜接的引出端口 132。該迴轉通 道14緊鄰在該分流通道13 一侧且呈彎弧狀，並具有一與 該排紙端口 112接通的第一端口 141及一與該引出端口 132 匯集且接通在該外侧· 121内側的第二端口 142，該第一 端口 141具有一對應於該分流通道13的内侧面⑷，及一與 該内側面141相對且對應於該排紙端口 ιΐ2的外側面⑷” 省第一142具有_對應於該内侧端〇 122的第一側 部142,及一與該第一側部142，相對且對應於該外側端口 i2i 的第二侧部142”，且該運紙通道U更具有一相對於該第一 端141的抵止114。該掃描單元21〇位在該内側端口 122與該排紙端口 112之間的掃描區段113 Λ，且位在該機 殼單元10的一底部。 該進紙滾輪組20是輛設在該進紙端口 111上。 4搬運滚輪組3G疋轴設在該内側端口 122與該掃描單 10 1304022 元210之間。 該排紙滾輪組40具有一主動輪41及二分設在該主動 輪41下上兩側且分別對應於該排紙端口 112及該外側端 口 121的第一、二從動輪42、43,該第一、二從動輪 43可受該主動輪41之掣動而相對於該主動輪41產生相對 轉動。 配合參閱圖2及圖3 ’該切換單元5()具有—樞設在該 運、我通道11與分流通道丨3銜接處的切換爪$ 1、—安裝在 該第-端口 141與該運紙通道u銜接處的第—切換片“及 -安裝在該第二端σ 142與該翻面通道12銜接處的第二切 、片 肖切換爪51具有-轴設在該引入端口 131與該第 一端口 141之間的拖接端部511及—與該樞接端部511呈相 反設置且可在該運紙通道11及該引人端口 131之間擺動的 擺動端部512。該第—切換片52是以具有可撓性的塑穋片 製成’是可由該掃描區段113朝該排紙端口 ιΐ2被單向擎動 地阻斷在該掃描區段113與該迴轉通道Μ銜接處，且使該 :紙端口 112朝該第一端口 141常保持暢通狀，並具有一固 定在該内側面⑷’的第—固定端部521及—與該第一固定 端部切減設置且制本身之材料性可抵止在該抵止 部113㈣-掀開端部522。第二切換片53也是以且有可 撓性的塑膠片製成，且可由該分流通道13及該迴轉通道Μ 朝該翻面通道12被單向掣動地封阻在該第二端口 142上， 且使該外側端…朝該内側端口 122常保持暢通狀，並 具有-固定在該第—側冑142，的第二固定端冑531及一與 11 1304022 孩墩應單元60具有 βι _^的弟一感 :、-设置在該搬運滾輪組30與該掃描單元21〇間的 間二應:：:一位在該第二端"142與該外側端口⑵ 1應件63及-位該第—端卩141與排紙端口 ιΐ2 間的第四感應件64。 μ 、、遐艰輸組70具有一掣動輪71及二分設在該掣 輪η兩側且分別位在該運紙通道u及該翻面通道12中 輔助輪72。 以下說明本發明上述較佳實施例的操作情形·· 如圖3、圖4所示，當文件細要進行雙面掃描，是由 上而下依序地排放在該進紙托盤17上，促使第一表面3ι〇 朝h第二表面320朝下’該進紙滾輪組2G受—動力源（ 圖未示）驅動即可將文件_帶人該運紙通道u中，當該 第二感應件62感應到文件扇的一前端且延遲—段時間， 可連線控制該掃描單元21G啟動及控制該切換爪Η擺動至 第位置（如圖3實線所示），該切換爪51的擺動端部 512伸設在該運紙通道u巾，且使該掃描區段ιΐ3朝該分 流通道13呈暢通狀，同時控制該主動輪41往順時針方向 轉動’文件3GG掃描（如圖4假想線所示）後就可由該運 紙通道11導人該分流通道13，並利用文件则前端頂開該 第一切換片53之第一掀開端部532，且朝該外侧端口 Hi 移送’最後朝該第二從動輪43及該主動輪41之間產生局 12 1304022 部移出（如圖4假想線所示，此時，文件扇㈣一表面 3H)已朝下，第二表面32〇則朝上）。且當文件則的後端 已完全自該第二切換片53下方移出時，原本被頂開的第二 切換片53會利用本身材質之特性，而使得該第二掀開端部 532回復抵止在該第二侧部142，，上。 接著，再如圖5所示，當第三感應件63感應到該文件 300的後端時，隨即控制該主動輪41反轉（即逆時針方向 轉動），且配合該中繼滾輪組70的驅動，可將文件3〇〇再 # *該翻面通道12朝該運紙通道U移送，當文件300前端再 文到該第二感應件62感應，在延遲一段時間後，可控制該 搬運滾輪組30將文件300朝該掃描單元21〇運送，且可連 線控制該掃描單元210啟動及控制該切換爪51擺動至一第 二位置（配合參閱圖3之假想線所示），該切換爪51的擺 動端部512伸設在該引入端口 131中且可阻斷該掃描區段 113朝該分流通道13暢通的路徑，且使該掃描區段ιΐ3朝 該排紙端口 112呈暢通狀。且當文件3〇〇的第二表面32〇掃 • 彳田後，就可朝該排紙端口 112移送，且利用文件3〇〇前端頂 開該第一切換片52的第一掀開端部521 (如圖3假想線所 示），最後朝該第一從動輪42及該主動輪41之間產生局部 移出（如圖5假想線所示，此時，文件3〇〇的第二表面32〇 朝下，第一表面310則朝上）。且當文件300的後端已完全 自該第一切換片52下方移出時，原本被頂開的第一切換片 52會利用本身材質之特性，而使得該第一掀開端部兄2回 復抵止在該抵止部114上。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transaction machine, and more particularly to a double-sided paper feeding device that can perform double-sided scanning in conjunction with a scanning unit and can restore the original order. ^ [Prior Art] As shown in Fig. 1, an automatic paper feeding device ("US Patent No. 5,784,680") is mounted on an image forming apparatus 1 and includes a ® housing unit 2, one disposed in a first channel 3〇1 inside the casing unit 2, a second channel 302 connected to the first channel 301, a turning channel 303 disposed above the second channel 302, and a second channel 3〇2 and a shunting channel 304 outside the turning channel 303, a pair of paper feed roller sets 4 corresponding to the first channel 3〇1, a first carrying roller set 501 disposed in the first channel 301, and a set a second carrying roller set 502 in the second passage 3〇2, a paper discharge roller set 6 disposed between the second passage 302 and the turning passage 303, and a set outside the paper discharge roller set 6 The return roller set 7, a ® is disposed between the paper discharge roller set 6 and the return roller set 7 and a rotary unit 9 disposed inside the paper discharge roller set 6. The casing unit 2 has a paper feed tray 201 which is disposed at an upper and lower intervals, an upper guide tray 202, and a lower paper discharge tray 203. The switching pawl 8 is switchable to a second position away from the shunting passage 304 by a first position proximate to the shunting passage 304. The slewing unit 9 has a curved curved track 901 enclosing a curved arc inside the paper discharge roller set 6, and a pawl 902' at the turning track 901 and engaging with the turning channel 303. The pawl 902' can be switched to a blocking position between the turning channel 303 and the branching channel 304 by an open position in which the turning surface 1304022 channel 303 and the branching channel 304 are unobstructed. When the document is to be scanned on both sides and is sequentially discharged from the top to the bottom of the paper feed tray 201, the switching claw 8 is initially held downward (as indicated by an imaginary line), originally facing upward. The first surface I is controlled by a first sensor 901 to control the paper feed roller set 4 to be driven, and is moved into the first passage 301 and driven by the first transport roller set 5〇1. A second sensor 902 and a scanner window 101 of the image forming apparatus i are connected to the second sensor 9〇2 to control the operation of starting the scanning. When a first surface I of the document passes through the scanner window 〇1 and is again transported by the first transport roller set 502 and the paper discharge roller set $, the first channel 302 can be transferred to the split channel 304, and The return roller set 7 is driven to partially move out toward the upper guide tray 202 (at this time, the first surface I of the document has been facing downward and a second surface is facing upward). Then, when a third sensor 903 senses a rear end of the file, or when a fourth sensor 904 delays that a rear end of the sensing file has passed a predetermined length, the return roller group 7 is controlled to be reversed. And controlling the switching claw 8 to swing upward (as indicated by the solid line), and closing the gate to the second passage 3〇2, so that the turning passage 3〇3 is kept open, and at this time, the claw 902 is located. In the open position (as indicated by the solid line), the document can be conveyed through the sheet discharge roller set 6 and along the turn-over passage 3〇3 and continue to be conveyed toward the first passage 301. When the * file is sensed by the second sensor 9G2, the connection can be controlled to perform the scanning operation, and the switching claw 8 can be controlled to swing downward (eg, the imaginary line 1304022 does not), and the second surface of the file! ! After passing through the scanner window 〇1, the second transport roller group 502 and the paper discharge roller group 6 are further driven to be sent to the shunting channel 304 (at this time, the second surface n of the document is facing downward, and The first surface I is facing up). When the second sensor 903 senses the rear end of the document, the reverse rotation of the return roller set 7 is controlled, and the switching claw 8 is controlled to swing upward (as shown by the solid line) and the gate to the second passage 302 is to be opened. Closed, and controlled by the pawl 9〇2 of the swivel unit 9, swinging upward and blocking an opening in the flipping channel 3〇3 (as indicated by an imaginary line), the document will be from the shunting channel 3〇4 And bypassing the revolving track 901, and transporting to the lower paper output tray 2〇3, at this time, the first surface I of the document has been facing downward, the second surface n is facing upward, and can be sequentially from bottom to top Emitted and kept in the same order as the original after scanning. Although the paper feeding device can perform double-sided scanning, and the scanned document sequence is consistent with the original document, the following defects are still present: The paper feeding device must set the gear in order to achieve the consistency of the scanned document sequence with the original document. The claw 902, the switching claw 8, and the driving member for controlling the movement of the pawl 902' and the switching claw 8 make the overall member numerous and complicated in structure. 1. After the second surface of the document is scanned, it will enter the return roller group 7' and then reverse the return roller group 7 through the revolving track 9〇1, and the paper is discharged. At this time, the turning channel 303 and The extension length of the first passage 301 must be greater than the document length 'otherwise, the front and rear ends of the document may overlap in the return roller group 7' and the paper feed cannot be completed. In order to avoid the above situation, the extended length of the turned-up channel 303 and the first channel 301 must be greater than the document length, and the overall length and volume of the 1304022 will also be large. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a double-sided paper feeding device which can perform double-sided scanning and which can sort the documents after scanning and which can match the original. Thus, the present invention can restore the original order of the double-sided paper feeding device, comprising a casing unit and a switching unit. The casing unit has a paper conveying passage, a turning passage which is connected to the paper conveying passage, a diverting passage connecting the paper conveying passage and the turning conveying passage, and a rotary passage outside the diverting passage. The paper path has a paper feed port, a paper discharge port that is not disposed above the paper feed port, and a scan section between the paper feed port and the paper discharge port, the turn channel has a pair of rows An outer port of the paper port and an inner port connected to the paper path, the shunt channel being adjacent to the paper discharge port and the outer port, the turn channel being curved and having a connection with the paper discharge port The first port and a second port that is integrated with the shunt channel and connected to the inside of the outer port. The switching unit has a switching claw pivoted at the junction of the paper path and the bypass channel, a first switching piece mounted at the junction of the first port and the paper path, and a second port mounted thereon a second switching piece at the junction of the turning channel, the scanning section is in a clear shape toward the dividing channel when the switching claw is in a first position, and the switching section can block the scanning section when in a first position a path that is unobstructed toward the shunting channel and makes the scanning section open to the paper discharge port, the first and second switching pieces are formed into a sheet shape of a flexible material, and the first switching piece is readable by the scanning The segment is unidirectionally slanted toward the paper discharge port to block the intersection of the scanning segment and the 1304022, and the paper discharge port is oriented toward the first pass, and the second switch piece is detachable by the split channel The slewing passage is unidirectionally slidably blocked on the second port toward the slewing passage, and the outer port is normally kept open toward the inner port. Thereby, the switching claw can be used to switch between the first and second positions, and the first and second switching sheets can be unidirectionally swayed, so that the file can be double-sided scanned and the scanned file can be completed. The arrangement order is consistent with the original, and the structure is simplified without increasing the overall volume. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. As shown in FIG. 2, it is a combination diagram, and the preferred embodiment of the double-sided paper feeding device capable of returning the original order of the present invention is suitable for being mounted on an image forming apparatus 200 (for example, a photocopying machine or a scanner), and The document 300 having a first surface 310 and a first surface 320 can be used for automatic transport and double-sided scanning. The image forming apparatus 2 has a scanning unit 21A. The double-sided paper feeding device comprises a casing unit 1 and a paper feed roller set 2〇 installed inside the casing unit 1〇, a conveying roller set 3〇, and a row of paper rollers arranged on the paper discharging roller The switching unit 5〇 on the inner side of the group 4, the induction unit 60, and the relay roller group %. 3A is a partially enlarged schematic view, the casing unit 10 has a c-shaped paper path u, a diverging passage 12 that is bifurcated in the middle of the paper path U, and a communication paper. The channel u and the shunt channel 丨3 of the turn 〇4〇22 LC 12, a swivel channel 14 outside the shunt channel 13, and a lower output tray 15 outside the revolving channel 14 are located at " The upper paper discharge tray 16 above the paper discharge tray 15 and one paper feed tray 17 above the tray 16 and corresponding to the paper feed path 11 are provided. The paper path 11 has a paper feed port (1), a paper discharge port U2 disposed above and below the paper feed port mf, and a sweep portion 113 between the paper feed port lu and the paper discharge, the turn channel 12 An outer port 121 having a pair of shovel 112 and an inner port 122 engaging with the paper path ,, the shunting channel 13 approaching the paper end 〇 ΐ 2 and the outer port 121, and having _ A lead-in port 131 that interfaces with the paper path u and an outlet port 132 that engages the turn-over channel 12. The revolving channel 14 is adjacent to the side of the diverting channel 13 and has a curved shape, and has a first port 141 connected to the paper discharge port 112 and a collector port 132 connected to the outlet port 132. a second port 142 on the inner side, the first port 141 has an inner side surface (4) corresponding to the flow dividing channel 13, and an outer side surface (4) opposite the inner side surface 141 and corresponding to the paper discharge port ι2" Having a first side portion 142 corresponding to the inner end turn 122, and a second side portion 142" opposite the first side portion 142 and corresponding to the outer port i2i, and the paper path U has Abutment 114 relative to the first end 141. The scanning unit 21 is clamped at the scanning section 113A between the inner port 122 and the paper discharge port 112, and is located at a bottom of the casing unit 10. The paper feed roller set 20 is provided on the paper feed port 111. 4 The transport roller set 3G 疋 axis is disposed between the inner port 122 and the scanning unit 10 1304022 210. The paper discharge roller set 40 has a driving wheel 41 and two first and second driven wheels 42 and 43 respectively disposed on two lower sides of the driving wheel 41 and corresponding to the paper discharging port 112 and the outer port 121, respectively. The first and second driven wheels 43 can be rotated relative to the driving wheel 41 by the sway of the driving wheel 41. Referring to FIG. 2 and FIG. 3 'the switching unit 5 () has a switching claw $1 pivoted at the junction of the transport channel, the channel 11 and the branching channel 丨3, and is mounted on the first port 141 and the paper a first switching piece at the junction of the channel u and a second cutting and switching arm 51 mounted at the junction of the second end σ 142 and the turning channel 12 have a shaft disposed at the introduction port 131 and the first The towing end portion 511 between the one port 141 and the swinging end portion 512 opposite to the pivoting end portion 511 and swingable between the paper path 11 and the drawing port 131. The first switching The sheet 52 is made of a flexible plastic sheet, and is slidably blocked by the scanning section 113 toward the paper discharge port ι 2 at the scanning section 113 and the rotary passage ,, and The paper port 112 is normally kept open toward the first port 141, and has a first fixed end portion 521 fixed to the inner side surface (4)' and is cut away from the first fixed end portion and is manufactured by itself. The material property can be resisted at the abutting portion 113 (four) - the split end portion 522. The second switching piece 53 is also flexible and flexible a sheet is formed, and the shunt passage 13 and the swivel passage Μ are unidirectionally slidably blocked on the second port 142 toward the flip passage 12, and the outer end ... is always kept open toward the inner port 122 Shaped, and having a second fixed end 胄 531 fixed to the first side 胄 142, and a and 13 1304022 child care unit 60 having a feeling of βι _ ^: - set in the carrying roller set 30 and The scanning unit 21 has a second interval::: a fourth position between the second end "142 and the outer port (2) 1 and 63 of the first end 卩141 and the paper discharge port ιΐ2 The sensing member 64. The 、, 遐 输 70 70 has a swaying wheel 71 and two points on both sides of the yoke n and are respectively located in the paper path u and the auxiliary wheel 72 in the turning channel 12. In the operation of the above-described preferred embodiment, as shown in FIG. 3 and FIG. 4, when the document is subjected to double-sided scanning, it is sequentially discharged from the top to the bottom on the paper feed tray 17, and the first surface is urged. 3ι〇向h second surface 320 facing down' The paper feed roller set 2G is driven by a power source (not shown) to bring the file to the person In the paper path u, when the second sensing element 62 senses a front end of the document fan and delays for a period of time, the scanning unit 21G can be connected to control and control the switching claw to swing to the first position (as shown in FIG. 3). As shown by the line, the swinging end portion 512 of the switching claw 51 extends in the paper path u, and the scanning section ι3 is smoothly formed toward the branching channel 13, and the driving wheel 41 is controlled to be clockwise. After the 'document 3GG scan (shown as the phantom line in FIG. 4) is rotated, the shunt channel 13 can be guided by the paper path 11 and the first split end 532 of the first switch piece 53 can be opened by the front end using the document. And moving to the outer port Hi', finally the portion 12 1304022 is moved out between the second driven wheel 43 and the driving wheel 41 (as shown by the imaginary line in Fig. 4, at this time, the document fan (four) a surface 3H) Down, the second surface 32〇 is facing up). And when the rear end of the document has been completely removed from the second switch piece 53, the second switch piece 53 that is originally opened will utilize the characteristics of the material itself, so that the second split end portion 532 returns to the end. On the second side portion 142, on. Then, as shown in FIG. 5, when the third sensing member 63 senses the rear end of the document 300, the driving wheel 41 is controlled to be reversed (ie, rotated counterclockwise), and the relay roller group 70 is matched. Drive, the file can be moved to the paper path U. When the front end of the document 300 is detected by the second sensing member 62, the carrying roller can be controlled after a delay. The group 30 transports the document 300 toward the scanning unit 21, and can be connected to control the scanning unit 210 to activate and control the switching claw 51 to swing to a second position (shown with reference to the imaginary line of FIG. 3). A swinging end portion 512 of the 51 extends in the introduction port 131 and blocks a path in which the scanning section 113 is unobstructed toward the branching passage 13 and makes the scanning section ι 3 open to the paper discharge port 112. And after the second surface 32 of the file 3〇 is swept to the field, the paper can be transferred to the paper discharge port 112, and the first opening end of the first switch piece 52 is opened by the front end of the document 3〇〇. 521 (as shown by the phantom line in FIG. 3), finally a partial shift occurs between the first driven wheel 42 and the driving wheel 41 (as shown by the phantom line in FIG. 5, at this time, the second surface 32 of the document 3〇〇) The first surface 310 faces upwards. And when the rear end of the document 300 has been completely removed from the first switch piece 52, the first switch piece 52 that is originally opened will utilize the characteristics of its own material, so that the first open end brother 2 returns. The stop portion 114 is stopped.
13 1304022 如圖6所示，當該第四感應件64感應文件300的後端 時’又控制該主動輪41順時針轉動，文件3〇〇前端受到該 第-切換片52的導引’可由該第—端口 141導入該迴轉通 C 14中並在頂開該第二切換片53後朝該外侧端口 J21 方向移送，最後由該外側端口 121輸出並落至該上出紙托 盤16中此時，文件300的第一表面310已朝下，且第二 表面320貝㈠月上，並可由下朝上依序排放，且可保持掃描 後的順序與原稿一致。 因此，本發明之送紙裝置不僅可完成雙面掃描，且掃 描後的文件300順序與原稿一致，並具有下列優點： 、利用該切換爪51在第一、二位置之間產生切換， 以及利用該第一、二切換片52、53的可被單向掣動之作用 ，就可達到掃描後的文件300順序與原稿一致，且只需設 置一個切換爪51，整體結構簡單、組裝容易，可降低整體 製造成本。 二、如圖5、圖6所示，該文件300經過第二表面320 的掃描後，一直到該文件3〇〇後端受到該第四感應件64感 應’该主動輪41才會順時針轉動，且使文件3〇〇受到該第 二切換片53導引而導入該迴轉通道μ中，所以，該翻面 通道12及第一通道u的延伸長度並不需要大於文件3〇〇長 度’文件300的前、後端也不會有產生重疊的缺失，不僅 可以順利完成送紙，且整體的長度及體積也不需要增大。 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 14 1304022 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是現有一種自動送紙裝置的組合示意圖； 圖2是一組合示意圖，說明本發明可回復原稿順序的 雙面送紙裝置的一較佳實施例； 圖3是本發明上述較佳實施例之一局部放大示意圖； 圖4是本發明上述較佳實施例之一切換爪的動作示意 圖，說明該切換爪擺動至一第二位置； 圖5是本發明上述較佳實施例之一送紙示意圖；及 圖6是本發明上述較佳實施例之出紙動作示意圖。13 1304022 As shown in FIG. 6, when the fourth sensing member 64 senses the rear end of the document 300, 'the driving wheel 41 is controlled to rotate clockwise, and the leading end of the document 3〇〇 is guided by the first switching piece 52'. The first port 141 is introduced into the swinging pass C 14 and is moved toward the outer port J21 after the second switching piece 53 is opened. Finally, the outer port 121 is output and falls to the upper paper output tray 16 at this time. The first surface 310 of the document 300 has been facing downward, and the second surface 320 is on the (one) month and can be sequentially discharged from the bottom up, and the order after scanning can be kept consistent with the original. Therefore, the paper feeding device of the present invention can not only perform double-sided scanning, but also the scanned document 300 is sequentially aligned with the original document, and has the following advantages: using the switching claw 51 to switch between the first and second positions, and utilizing The first and second switching pieces 52, 53 can be unidirectionally swayed, so that the sequence of the scanned document 300 can be consistent with the original document, and only one switching claw 51 needs to be provided, and the overall structure is simple and easy to assemble, and can be reduced. Overall manufacturing costs. 2. As shown in FIG. 5 and FIG. 6, the document 300 is scanned by the second surface 320 until the rear end of the document 3 is sensed by the fourth sensing member 64. The driving wheel 41 will rotate clockwise. And the file 3〇〇 is guided by the second switching piece 53 to be introduced into the rotary channel μ, so the extended length of the turned-up channel 12 and the first channel u does not need to be larger than the file length ' file There is no overlap between the front and the back of the 300. Not only can the paper feed be completed smoothly, but the overall length and volume do not need to be increased. However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent change of the scope and the description of the invention according to the present invention is 14130402. Modifications are still within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the combination of a conventional automatic paper feeding device; FIG. 2 is a combined schematic view showing a preferred embodiment of the double-sided paper feeding device capable of returning the original order of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 4 is a schematic view showing the operation of a switching claw according to a preferred embodiment of the present invention, illustrating that the switching claw is swung to a second position; FIG. 5 is a preferred embodiment of the present invention. One example of paper feeding; and FIG. 6 is a schematic view of the paper discharging operation of the above preferred embodiment of the present invention.
15 130402215 1304022
【主要元件符號說明】 10*••… …機殼單元 30 ····· •…搬運滾輪組 11…… …運紙通道 40 •… •…排紙滚輪組 m ·… …進紙端口 41 …·· •…主動輪 112 ·… …排紙、口 42 ··.·· •…第 從動輪 113 …· …知*描£丰又 43 •…· •…第二從動輪 114 …· …抵止部 50 ••… •…切換單元 12 ·•.… …翻面通道 51 ····. •…切換爪 121… …外側端口 511… •…樞接端部 122 ·… …内側端口 512… •…擺動端部 13 •…· …分流通道 52 …·· •…第一切換片 131 ·… …引入端口 53 ••… •…第二切換片 132 …· …引出端口 60····· •…感應單元 14…… …迴轉通道 61 ••… •…第一感應件 141 …* …第一端口 62 • •… …·第二感應件 141，… …内側面 63 · ··· …·第三感應件 141”… …外側面 64 · . · .· …·第四感應件 142 …· …第二端口 70 ····· •…中繼滾輪組 142,… …第一側部 71 ••… •…掣動輪 142，，·" …第二側部 72 ····. •…輔助輪 15 *…" …下出紙托盤 200… •…影像形成裝置 16…… …上出紙托盤 210… •…掃描單元 17…… …進紙托盤 300… …·文件 20…… …進紙滾輪組 310… —第 表面 16 1304022 320 .......第二表面[Description of main component symbols] 10*••... Chassis unit 30 ·························································· ...·· •...Drive wheel 112 ·... Paper discharge, port 42 ············································································ Abutment portion 50 ••... •...Switching unit 12 ·•....Flip channel 51 ·····....Switching claw 121...Outside port 511...•...Pivot end 122......inside port 512 ... •...Swing end 13 •...· ...shunt channel 52 ...···...first switching piece 131 ·...introduction port 53 ••... •...second switching piece 132 ...· ...lead port 60···· • •... Sensing unit 14... ...swivel channel 61 ••... •...first sensing element 141 ...* ...first port 62 • •...·second sensing element 141,...inside side 63 · ··· ... · The third inductive member 141" ... the outer side 64 · · · · · · · 4th sensing member 142 ... ... ... second port 70·····•... Relay roller set 142, ... first side 71 ••... •... 轮 wheel 142,,···...second side 72 ·····.......auxiliary wheel 15 *..." ... lower paper output tray 200... • Image forming device 16 ... ... upper paper output tray 210 ... • scanning unit 17 ... ... paper feed tray 300 ... ... file 20 ... ... paper feed roller group 310... — first surface 16 1304022 320 ....... second surface