1245015 九、發明說明： 【發明所屬之技術領域】 本發明係關於使用於印表機等列印裝 和她衷輪適當地移送紙張 機：，以移送滾輪 【先前技術】 〜哉構。 先前的用紙移送機構，配置在印 紙拖盤（圖中未示）内的記錄媒體移送给’可=容在送 列印部列印了圖像的記錄媒體送 ：、或者可將在 部。 _出到印表機的外 基於圖3對先前如此的用紙移送機構 有藉由馬達(圖中未示)旋轉而可進行旋轉的：：二其配置 =有按*該移送滾輪52並且跟隨移送滾輪：= 進行％轉的按壓滾輪53。 轉而可 上=按壓滾輪53被由小螺絲54安震在印表機侧的框體上 的板貫55支撐著，由於板簧55的 宁於^ 平注力而弹性趨向於移送 滾輪52。而且，在移送滾輪52的下 铋你妒βπ A ， k接者由收容於送 、输2内的列印紙等厚紙張構成的記錄媒體5 6。 另外’藉由移送滾輪52的順時針方向的旋轉，可以向箭 頭A的方向移送記錄媒體56。 而且’在用紙移送機構51的圖示左側，配置有具有列印 頭的列印部⑽中未示）’在該列印部與用紙移送機構以 間’配置有由於移送滾輪52的旋轉來將朝箭頭A方向移送的 記錄媒體56確實地爽緊、而向列印部移送的移送滚輪（圖中 未不）和壓接滾輪（圖中未示）。 93640.doc 1245015 另外，被送紙滾輪和壓接滾輪夾緊的記錄媒體56，由送 紙滾輪的往復旋轉，可往復地沿列印部進行移送。 如果對將如此的先前用紙移送機構51例如用於熱轉印印 表機進行彩色列印時的動作進行說明，則首先藉由移送滾 輪52的順時針方向旋轉，將收容於送紙拖盤内的記錄媒體 56按箭頭A的方向移送，而移送到圖示左側的列印部（圖中 未不）。 —此時的記錄媒體56,被配置在列印部附近的送紙滾輪和 按壓滾輪夾緊，並被移送到熱敏頭處於擡起狀態的列印部。 當將上述記錄媒體56的一定的量移送到列印部後，則檢 測出列印媒體5 6的後端部5 6 b並進行列印開始時的露頭。此 時的記錄媒體56離開移送滾輪52的麼接，成爲被送紙滾輪 和壓接滾輪夾緊的狀態。 另外，記錄媒體露頭後，將熱敏頭壓下，將色帶壓接在 記錄媒體56上並由送紙滾輪的旋轉將記錄媒體％朝箭頭a 相反的方向的箭頭B的方向牵引並進行回送。 此時，藉由熱敏頭的發熱元件有選擇地發熱，將色帶的 第一顏色的墨熱轉印到記錄媒體56上’從而將第一顏色的 圖像列印在記錄媒體56上。 由上述送紙滾輪向箭頭B方向牽引而被回送的記錄媒體 56，是其後端部56b被移送滾輪52和按壓滾輪53夾持而向箭 頭方向回送的。 然後，將記錄媒體56反復移送到列印部，在第一顏色的 圖像上重疊列印第二顏色，在第二顏色的圖像上重疊列印 93640.doc 1245015 第三顏色，因此可以在記錄媒體56上列印所希望的彩色書 像。 一 [專利文獻1]特開平7-19777號公報 特開平8-259030號公報 但是，先前的用紙移送機構，由板簧55支撐按壓滾輪53， 该板黃55有小螺絲54固定在框體側，因此零件的數量以及 組裝工序變多，產生增加成本的問題。 而且，當將列印中的記錄媒體56向箭頭B方向回送時，如 圖愤示，記錄媒體56㈣端部56b會碰到移送滾㈣和按 墨滾輪53，而記錄媒體56向上方按壓按壓滾輪^時，就可 能發生移送錯位。 記錄媒體56上如果發生如此的錯位，在重疊列印不同的 顏色而進行彩色列印時，就會發生列印錯位的列印不良的 問題 【發明内容】 本發明，係鑒於前述誤者s 月J戊尿4而為者，其目的在於提供一 可以減少零件數I日爿士 + i 體也不…”並且即使往復移送記錄媒 A a么生移达錯位的用紙移送機構。 爲了貫現上述目的繁__. 方案，本發明的用紙移送機構， 具％欲在於··具備由辦t 、，於芬 備由驅動馬達的驅動力所旋轉驅動的移送 輪，上述按厂” A 輪的上方亚可自由旋轉的按壓滾 之間被π 利用其自重按麼在與上述移送滾輪 之間破私迗的記錄媒體。 而且，爲了實現上述目的第— 扪弟一方案，其特徵在於：在上 93640.doc 1245015 述按壓滾輪與上述移送滚輪之間，形成較上述記錄媒體的 厚度尺寸窄的間隙。 而且，爲了實現上述目的第三方案，其特徵在於：上述 移送滾輪，其旋轉軸可旋轉地支撐在列印裝置側的框體 上，上述按壓滾輪，其旋轉軸可上下活動地支撐在形成於 上述框體上的上下方向的長孔狀支撐孔中，並且當上述記 錄媒體被移送到上述間隙時，上述按壓滾輪被壓向上方， 上述旋轉軸在上述長孔内上升，並且利用上述按壓滚輪的 自重使上述記錄媒體由上述移送滾輪所按壓。 而且，爲了實現上述目的的第四方案，其特徵在於：上 述間隙的尺寸係形成爲上述記錄媒體厚度的1/2。 【實施方式】 以下茶肊圖式1、·2對本發明的用紙移送機構進行說明。 首先，圖1係說明採用本發明的用紙移送機構的列印裝置的 概要圖。圖2係關於本發明的用紙移送機構的放大圖。 首先’本發明的用紙移送機構1被組裝在列印裝置ρ中， 可以在後述的送紙滾輪6與壓接滾輪7之間移送記錄媒體。 如圖1、圖2所示，藉由傳動機構（圖中未示）將外周部被 橡膠等高摩擦材料包覆的移送滾輪2連結到馬達（圖中未示） 上，而可叙轉地配置上述用紙移送機構工。 而且，在移送滾輪2的上方配置可自由旋轉的壓接滾輪 3。该壓接滾輪3由比重較大的金屬構成。 而且，由列印裝置ρ側的框體4的一部分分別支撐移送滾 輪2的旋轉軸2a和壓接滾輪3的旋轉軸3a。 93640.doc 1245015 而且，支撐按壓滚輪3的旋轉軸3&的支撐孔乜在上下方向 被形成長孔形狀。因此，按壓滾輪3可以沿著長孔形狀的支 撐孔4a使旋轉軸3a上下活動。 那麼，如圖2所示，在支撐孔4a的支撐下因自重而下降時 的知:壓滾輪3與移送滾輪之間，形成規定尺寸的間隙〇。上 述移送滾輪2與按壓滾輪3之間的間隙G，由構成記錄媒體5 的列印紙等的厚紙的厚度尺寸τ的大致1/2的尺寸而形成。 而且，在間隙G的移送滾輪2與按壓滾輪3之間，夾持在後 述的列印部8正在列印的或者已經列印完了的記錄媒體5， 而由按壓滾輪3的自重即可壓住移送滾輪2。 而且，在移送滾輪2的下部，壓接收容於送紙盤（圖中未 不）的記錄媒體5，藉由移送滾輪2向順時針方向旋轉，可使 之向箭頭C方向移送。 以熱轉印式印表機來說明採用如此的本發明的用紙移送 機構1的列印裝置Ρ，在箭頭c的記錄媒體5的移送方向的用 紙移送機構1的下游側，配置圓柱狀的送紙滾輪6、和配置 在該送紙滚輪6的圖示上部侧由螺旋彈簧（圖中未示）等按壓 在送紙滾輪6上的壓接滾輪7。 而且’藉由移送滾輪2的旋轉從送紙盤向箭頭以向移送 的。己錄媒體5被运紙滾輪6和壓接滾輪7之間壓接夹持而被 夾緊。 被上述送紙滾輪6和塵接滾輪7夾緊的記錄媒體5，可以藉 由向逆時針方向旋轉送紙滾輪6，而被移送到位於送紙滾^ 6的下游侧附近的列印部8。 93640.doc 1245015 在上述列印部8上，在移送來的記錄媒體5的上方側配置 有熱敏頭9，在該熱敏頭9的下部側配置有可自由旋轉的壓 、、、氏滾輪1 0。另外，熱敏頭9可以相對壓紙滾輪丨〇接觸離開（頭 擡起/頭下降）。 而且，在熱敏頭9與壓紙滾輪10之間來回通過色帶u，該 色帶11比如在一方的面的圖示下面側上依次形成不同顏色1245015 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to the use of a printing machine such as a printer and a paper wheel to properly transfer a paper machine: to transfer a roller [prior art] to a structure. In the previous paper transfer mechanism, a recording medium arranged in a paper tray (not shown) can be transferred to a recording medium that can hold images printed in a printing section, or can be delivered to the department. _Exit to the outside of the printer Based on Figure 3, the previous paper transfer mechanism can be rotated by the rotation of a motor (not shown): 2: its configuration = there is a press * the transfer roller 52 and follow the transfer Roller: = Press the roller 53 for% rotation. In turn, it can be turned up = the pressing roller 53 is supported by a plate 55 which is shaken by a small screw 54 on the frame of the printer side. The elasticity of the plate spring 55 tends to transfer the roller 52 due to the flat injection force of the plate spring 55. Further, under the transfer roller 52, you are jealous of βπA, and the k-receiver is a recording medium 56 composed of thick paper such as printing paper contained in the feed 2 and the feed 2. In addition, by rotating the transfer roller 52 clockwise, the recording medium 56 can be transferred in the direction of the arrow A. Further, "a printing section having a print head is disposed on the left side of the paper conveying mechanism 51 (not shown)" is disposed between the printing section and the paper conveying mechanism, and is rotated by the rotation of the transfer roller 52. The recording medium 56 transferred in the direction of the arrow A is surely tight, and a transfer roller (not shown in the figure) and a crimping roller (not shown in the figure) are transferred to the printing section. 93640.doc 1245015 In addition, the recording medium 56 clamped by the paper feed roller and the pressure contact roller can be reciprocatedly moved along the printing section by the reciprocating rotation of the paper feed roller. To describe the operation when such a conventional paper transfer mechanism 51 is used for color printing on a thermal transfer printer, for example, first, the transfer roller 52 is rotated in a clockwise direction to be stored in a paper feed tray. The recording medium 56 is transferred in the direction of the arrow A, and is transferred to the printing section on the left side of the figure (not shown in the figure). — The recording medium 56 at this time is clamped by a paper feed roller and a pressing roller arranged near the printing section, and is transferred to the printing section where the thermal head is in a raised state. When a certain amount of the above-mentioned recording medium 56 is transferred to the printing section, the trailing end portion 5 6 b of the printing medium 56 is detected and exposed at the start of printing. At this time, the recording medium 56 leaves the transfer roller 52, and is clamped by the paper feed roller and the pressure contact roller. In addition, after the recording medium is exposed, the thermal head is pressed down, the ribbon is pressed against the recording medium 56, and the rotation of the paper feed roller pulls the recording medium% in the direction of the arrow B opposite to the arrow a and returns it. . At this time, the heating element of the thermal head selectively generates heat, and the ink of the first color of the ribbon is thermally transferred to the recording medium 56 'to print the image of the first color on the recording medium 56. The recording medium 56 that is pulled back by the paper feed roller in the direction of arrow B is returned by the rear end portion 56b of the recording medium 56 in the direction of the arrow while being clamped by the transfer roller 52 and the pressing roller 53. Then, the recording medium 56 is repeatedly transferred to the printing section, and the second color is superimposed on the image of the first color, and the third color is superimposed on the image of the second color. 93640.doc 1245015 A desired color book image is printed on the recording medium 56. [Patent Document 1] Japanese Patent Application Laid-Open No. 7-19777 Japanese Patent Application Laid-Open No. 8-259030. However, in the previous paper transfer mechanism, the pressing roller 53 was supported by a plate spring 55, and the plate yellow 55 was fixed on the frame side with small screws 54 Therefore, the number of parts and the number of assembling processes are increased, which causes a problem of increasing costs. Further, when the printing recording medium 56 is returned in the direction of arrow B, as shown in the figure, the recording medium 56 and the end portion 56b will encounter the transfer roller and the ink roller 53, and the recording medium 56 presses the pressing roller upward. ^, Shift misalignment may occur. If such a misalignment occurs on the recording medium 56, when different colors are overlapped and printed in color, the problem of poor printing may occur. [Abstract] The present invention is based on The purpose of this example is to provide a paper transfer mechanism that can reduce the number of parts in one day and the sampan + i body ... "and even reciprocally transfers the recording medium A to a misplaced paper. In order to achieve the above The purpose of the __. Solution, the paper transfer mechanism of the present invention is designed to have a transfer wheel rotatably driven by the driving force of the drive motor. The above is above the A wheel of the factory. The freely rotatable pressing roller is pressed by π using its own weight to break the private recording medium with the transfer roller. Moreover, in order to achieve the above-mentioned first solution of the second brother, it is characterized in that a gap narrower than the thickness and size of the recording medium is formed between the pressing roller described in 93640.doc 1245015 and the transfer roller. Furthermore, in order to achieve the third aspect of the above object, the rotary shaft of the transfer roller is rotatably supported on a frame on the side of the printing device, and the rotary shaft of the pressing roller is supported movably on the rotary shaft. In the long hole-shaped support hole in the up-down direction on the frame, and when the recording medium is moved to the gap, the pressing roller is pressed upward, the rotation shaft rises in the long hole, and the pressing roller is used. The dead weight causes the recording medium to be pressed by the transfer roller. Furthermore, in order to achieve the fourth aspect of the above object, the size of the gap is formed to be 1/2 of the thickness of the recording medium. [Embodiment] The following teapot patterns 1 and 2 describe the paper transfer mechanism of the present invention. First, Fig. 1 is a schematic diagram illustrating a printing apparatus using a paper transfer mechanism of the present invention. Fig. 2 is an enlarged view of a paper transfer mechanism according to the present invention. First, the paper transfer mechanism 1 of the present invention is incorporated in a printing device ρ, and a recording medium can be transferred between a paper feed roller 6 and a pressure contact roller 7 described later. As shown in Figs. 1 and 2, the transmission roller 2 whose outer periphery is covered with a high-friction material such as rubber is connected to a motor (not shown) by a transmission mechanism (not shown), so that Configure the above paper transfer mechanism. A crimping roller 3 is rotatably arranged above the transfer roller 2. The pressure contact roller 3 is made of a metal having a large specific gravity. The rotating shaft 2a of the transfer roller 2 and the rotating shaft 3a of the pressure contact roller 3 are supported by a part of the housing 4 on the printing device ρ side. 93640.doc 1245015 Furthermore, the support hole 支撑 supporting the rotary shaft 3 of the pressing roller 3 is formed in a long hole shape in the vertical direction. Therefore, the pressing roller 3 can move the rotary shaft 3a up and down along the long hole-shaped support hole 4a. Then, as shown in FIG. 2, when the weight is lowered by the support hole 4a due to its own weight, it is known that a gap of a predetermined size is formed between the pressure roller 3 and the transfer roller. The gap G between the transfer roller 2 and the pressing roller 3 described above is formed by a size approximately ½ of the thickness dimension τ of thick paper such as printing paper constituting the recording medium 5. In addition, the recording roller 5 that is being printed or has been printed is held between the transfer roller 2 and the pressing roller 3 of the gap G, and the pressing roller 3 can hold it by its own weight. Transfer roller 2. Further, the recording medium 5 contained in the paper feed tray (not shown in the figure) is pressed and received at the lower portion of the transfer roller 2, and the transfer roller 2 can be rotated in the direction of arrow C by rotating it clockwise. A thermal transfer printer is used to describe the printing device P using the paper transfer mechanism 1 of the present invention. A cylindrical feed is arranged on the downstream side of the paper transfer mechanism 1 in the direction of the recording medium 5 of the arrow c. The paper roller 6 and the pressure-contact roller 7 arranged on the upper side of the paper feeding roller 6 are pressed against the paper feeding roller 6 by a coil spring (not shown) or the like. Further, it is moved from the paper feed tray to the arrow by the rotation of the feed roller 2. The recorded medium 5 is clamped by being crimped between the paper transport roller 6 and the crimping roller 7 and clamped. The recording medium 5 clamped by the paper feed roller 6 and the dust receiving roller 7 can be transferred to the printing section 8 near the downstream side of the paper feed roller 6 by rotating the paper feed roller 6 counterclockwise. . 93640.doc 1245015 A thermal head 9 is arranged on the printing unit 8 above the transferred recording medium 5 and a freely rotatable pressure roller is arranged on the lower side of the thermal head 9 1 0. In addition, the thermal head 9 can be moved away from the platen roller (head up / down). In addition, a ribbon u is passed back and forth between the thermal head 9 and the platen roller 10, and the ribbon 11 is sequentially formed with different colors on the lower surface of one side of the illustration, for example.
的墨而構成彩色色帶，由熱敏頭9將彩色墨依次重復地列印 在3己錄媒體上從而可以列印彩色書像。 而且，色帶11分別一端卷在卷帶輪（圖中未示）上，而另一 方卷在供給輪（圖中未示）上，並使色帶可以向箭_的方向 捲曲滑動。而且在色帶u的移送路徑上，配置繃緊滾輪12。 "說明在如此的列印裝置p的記錄媒體5上列印所希望的的 彩色畫像的動作，首先將熱敏頭9擡起，與壓紙滾輪卿開 規定的距離，處於列印前的待機狀態。The color ink is used to form a color ribbon, and the color ink is sequentially and repeatedly printed on the 3 recorded media by the thermal head 9 so that a color book image can be printed. Further, one end of the ribbon 11 is wound on a take-up roller (not shown), and the other is wound on a supply roller (not shown), and the ribbon can be curled and slid in the direction of the arrow _. A tension roller 12 is arranged on the transfer path of the ribbon u. " Describe the operation of printing a desired color portrait on the recording medium 5 of such a printing device p. First, the thermal head 9 is raised, and a predetermined distance is set from the platen roller. standby mode.
在該待機狀態，將由紙張機W向箭頭C方向移送的⑴ 媒體5壓接夾持在送紙滾輪6與壓接滾輪7之間，並由送紙《 請旋轉將記錄媒體5進一步向箭頭c的方向移送到擡; 狀態的熱敏頭9與壓紙滾輪10之間。 然後’ “己錄媒體5向箭頭c方向移送規定的量 感測器（圖中未示）檢測出牟a + 」出圮錄媒體5的後端部5b後，進行$ 印：始前的:己錄媒體5的露頭，並停止記錄媒體5的移送。 ' / Z錄媒體5的露頭後，使熱敏頭9降下壓接4 於壓紙滾輪10上的記錄媒體5上的色帶13。 同丁根據歹J印貝訊有選擇地使熱敏頭9的多個發熱元叫 93640.doc •10- 1245015 9a發熱，並且使送紙滾輪6向 四焚轉，向箭頭 D方向拉動記錄媒體5進行回送。 、於是，如圖2所示，記錄媒體5的後端部外就會碰 滾輪2和按壓滚輪3。 ^ 此時’移送滚輪2與送紙是一樣的、也向順時針方向广 轉，而且按壓滾輪3由自重的作用在支撐槽粍内下降，= 送滾輪2之間形成間隙G。 + 移 然後，向箭頭D方向回送的記錄媒體5的後端部％ 將按壓滾輪3M向上方，由移送滚輪2的順時針方向旋^， 將向箭頭D方向回送的記錄媒體5牵引到移送滾輪2與 滾輪3之間並可以向箭頭D方向進一步回送。 上述按壓滾輪3由自重的作用下降，因此，向箭則方向 列印紙等的厚紙構成的記錄媒體5，可以容易 壓滾輪3頂向上方。 牧 如此’就將色帶13的青綠色熱轉印到向箭頭D方向回送的 口己錄媒體5的一方χ 像列印。方的面（圖不上面）上’並進行第一顏色的畫 當第—顏色的畫像列印完成後，使移送滾輪2與送 位H的旋主轉反轉並將記錄媒體5再次返回到記錄開始的 ㈣青綠色的墨的晝像列印-樣，在青綠色的第一 ;面重疊列印深紅色的墨，進行第二顏色的晝像列 的復進行同樣的動作，在深紅色的第二顏色晝像 且列印黃色墨’從而進行第三顏色畫像列印，並 93640.doc 1245015 可以在記錄媒體5上列印所希望的彩色晝像。 上述彩色列印中的記錄媒體5在被送紙滾輪6和壓接滾輪 7夾持的狀態往返移送，每個列印動作，都會使記錄媒體$ 的後端部5b碰到本發明的用紙移送機構丨的移送滾輪2和按 壓滾輪3，但是，記錄媒體5的後端部几可以順利地將因自 重而下降的按壓滾輪3頂起來。 因此，可以防止在移送中的記錄媒體5上發生錯位，即使 在重豐列印不同顏色的彩色列印時，也可以列印出沒有錯 位的高質量的畫像。 另外，凡成了所希望的彩色畫像的列印的記錄媒體5，解 除了由送紙滾輪6和壓接滾輪7的夾持，由移送滾輪2和壓接 滾輪3向箭頭D方向回送，並向列印裝置p的外面排出紙張。 而且，本發明的用紙移送機構1，以按壓滾輪3的自重將 記錄媒體5按壓在移送滾輪2上，不需要先前的板簣55以及 小螺絲54等，因此可以削減數量和組裝工作量。 另外，在本發明的實施例的說明中，是以彩色列印進行 的說明，但是也可以藉由在使用在色帶上塗上一種顏色的 油墨的色帶而進行單色的畫像列印。 而且，以熱轉印印表機說明記錄裝置p，也可以是採用由 熱感紙構成的記錄媒體的熱感式印表機。 上上述本發明的按壓滾輪，由於可以用自重對在移 送，輪之間移送的記錄媒體進行按壓，因此不需要先前的 板簧或小螺絲，削減了零件數量以及組裝工作量，並提供 可以減少成本的用紙移送裝置。 93640.doc -12- 1245015 =且，由於在按壓滾輪和移送滚輪之間形成比記錄媒體 :度尺寸小的間隙，因此將回送的記錄媒體順利地牵引到 起來。 袞輪之間，亚可以不費事地將按壓滾輪頂 因此’即使反復地往返移送記錄媒體，也不會發生移送 ，，曰位，可以列印高質量的彩色畫像等。 而^ ’當向間隙移送了記錄媒體後，將按壓滾輪頂向上 疑轉軸在長孔上上升的同時，由按壓滾輪的自重將記 錄媒體按壓在移送滾輪上， ， 口此，由回达的記錄媒體的後 ^各易地頂起按壓滾輪，可以反復地沒有錯位地往返移 运§己錄媒體。 而且，由於以記錄媒體的厚度尺寸的1/2的尺寸形成間 承=此’可以用很小的記錄媒體的回送力確實地頂起按 广袞輪’並且被頂起的按壓滾輪由自重的作用還確實地按 塵在記錄媒體上。 、 【圖式簡單說明】 圖1係說明採用本發明的用紙移送機構的列印裝置的概 Γ£ϊ 圖2係本發明的用紙移送機構的放大圖。 圖3係說明先前的用紙移送機構的概要圖。 圖4係說明先前的用紙移送機構的問題的概要圖。 【主要元件符號說明】 1 傳送機構 2 * 傳送滾輪 93640.doc 13- 1245015 2a 旋轉軸 3 壓接滾輪 3a 旋轉軸 4 框體 4a 支撐孔 5 記錄介質 5a 後端部 5b 後端部 6 送紙滾輪 7 壓接滾輪 8 印刷部 9 熱敏頭 9a 發熱元件 10 壓紙滾輪 11 色帶 12 繃緊滚輪 13 色帶 51 傳送機構 52 傳送滾輪 53 按壓滾輪 54 小螺絲 55 板簧 56 記錄介質 56 - 後端部 93640.doc 1245015 A 箭頭 B 箭頭 C 箭頭 D 箭頭 E 箭頭 G 間隙 P 印刷裝置In this standby state, the media 5 that is transferred from the paper machine W to the direction of the arrow C is crimped between the paper feed roller 6 and the pressure contact roller 7 and is fed by the paper "Please rotate the recording medium 5 further to the arrow c The direction is moved to the state between the thermal head 9 and the platen roller 10. Then "" The recorded media 5 moves a predetermined amount sensor (not shown) in the direction of the arrow c to detect Moa + "." After the back end portion 5b of the recorded media 5 is output, print $: Before: Before The recording medium 5 appears, and the transfer of the recording medium 5 is stopped. After the recording medium 5 is exposed, the thermal head 9 is lowered and the pressure ribbon 4 on the recording medium 5 on the platen roller 10 is lowered. Tong Ding selectively made multiple heating elements of the thermal head 9 called 93640.doc according to 歹 J Yinbeixun • 10-1245015 9a, and turned the paper feed roller 6 to four, and pulled the recording medium in the direction of arrow D. 5 Perform a loopback. Then, as shown in Fig. 2, the roller 2 and the pressing roller 3 are touched outside the rear end portion of the recording medium 5. ^ At this time, the 'feeding roller 2 is the same as the paper feeding, and also rotates clockwise widely, and the pressing roller 3 is lowered in the support groove by the action of its own weight, = a gap G is formed between the feeding rollers 2. + Then, move the rear end of the recording medium 5 returned in the direction of arrow D. Press the roller 3M upwards, turn it clockwise by the transfer roller 2 ^, and pull the recording medium 5 returned in the direction of arrow D to the transfer roller. 2 and roller 3 can be further returned in the direction of arrow D. The pressing roller 3 is lowered by its own weight. Therefore, the recording medium 5 made of thick paper such as paper can be printed in the direction of the arrow, and the pressing roller 3 can be easily pushed upward and upward. In this way, the cyan-green color of the ribbon 13 is thermally transferred to one of the χ images of the oral recording medium 5 which is returned in the direction of the arrow D and printed. On the square surface (not shown above) and draw the first color. When the first-color image is printed, reverse the rotation of the rotation of the transfer roller 2 and the position H and return the recording medium 5 to The daytime image of the cyan-green ink at the beginning of recording is printed-like, the first in cyan; the crimson ink is printed on the surface, and the second image of the daytime image is repeated. The second color day image and yellow ink are printed to print a third color image, and 93640.doc 1245015 can print a desired color day image on the recording medium 5. The recording medium 5 in the above-mentioned color printing is transferred back and forth while being clamped by the paper feed roller 6 and the crimping roller 7, and each printing operation causes the rear end portion 5b of the recording medium $ to touch the paper transfer of the present invention. The transfer roller 2 and the pressing roller 3 of the mechanism 丨, however, the rear end portion of the recording medium 5 can smoothly push the pressing roller 3 lowered by its own weight. Therefore, it is possible to prevent misalignment on the recording medium 5 being transferred, and it is possible to print high-quality portraits without misalignment even when printing in different colors and colors. In addition, any recording medium 5 that has been printed as a desired color image is released from being clamped by the paper feed roller 6 and the pressure contact roller 7, and is returned by the transfer roller 2 and the pressure contact roller 3 in the direction of arrow D, and The paper is discharged to the outside of the printing device p. In addition, the paper transfer mechanism 1 of the present invention presses the recording medium 5 against the transfer roller 2 by the weight of the pressing roller 3, and does not need the previous plate 55 and small screws 54. Therefore, the number and assembly work can be reduced. In addition, in the description of the embodiment of the present invention, the description is made by using color printing. However, it is also possible to perform monochrome image printing by using a ribbon in which a color ink is applied to the ribbon. Furthermore, the recording device p will be described using a thermal transfer printer, and a thermal printer using a recording medium composed of thermal paper may be used. Since the pressing roller of the present invention described above can press the recording medium transferred between the wheels with its own weight, it does not need the previous leaf spring or small screws, reduces the number of parts and assembly workload, and provides a reduction in Cost of paper transfer device. 93640.doc -12- 1245015 = Also, because the gap between the pressing roller and the transfer roller is smaller than the recording medium size, the returned recording medium is smoothly pulled up. Between the wheels, Ya can effortlessly press the top of the roller. Therefore, even if the recording medium is repeatedly transferred back and forth, the transfer will not occur, and the position can be printed, and high-quality color portraits can be printed. ^ 'When the recording medium is transferred to the gap, while pressing the top of the pressing roller to raise the suspect shaft on the long hole, press the recording medium on the moving roller by the weight of the pressing roller. The media can easily lift and press the wheel, and can repeatedly transport the recorded media without dislocation. Moreover, since the gap is formed at a size 1/2 of the thickness dimension of the recording medium = this 'the pressing wheel can be reliably lifted with a small return force of the recording medium', and the pressed pressing roller is lifted by its own weight. The effect is also firmly on the recording medium. [Brief Description of the Drawings] FIG. 1 is a schematic diagram illustrating a printing device using the paper transfer mechanism of the present invention. FIG. 2 is an enlarged view of the paper transfer mechanism of the present invention. FIG. 3 is a schematic diagram illustrating a conventional paper transfer mechanism. FIG. 4 is a schematic diagram illustrating a problem with a conventional paper transfer mechanism. [Description of main component symbols] 1 Conveying mechanism 2 * Conveying roller 93640.doc 13- 1245015 2a Rotating shaft 3 Crimping roller 3a Rotating shaft 4 Frame 4a Support hole 5 Recording medium 5a Rear end 5b Rear end 6 Paper feed roller 7 Crimping roller 8 Printing section 9 Thermal head 9a Heating element 10 Platen roller 11 Ribbon 12 Tightening roller 13 Ribbon 51 Transmission mechanism 52 Transmission roller 53 Pressing roller 54 Small screw 55 Leaf spring 56 Recording medium 56-Rear Department 93640.doc 1245015 A arrow B arrow C arrow D arrow E arrow G gap P printing device
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