1289740 8032-1A-TWP.doc-6/24 後，施行定像，所以能使作爲彩色畫像的畫像成形速度快速。 第5圖及第6圖係在串列方式中’分別表示依次由各色相顯 像劑依序堆疊畫像的方式，及於中間體由各色相顯像劑的堆疊 畫像後，以總括轉寫在媒體表面的方式。如第5圖所示，爲了 5以電子照相方式形成彩色畫像的畫像形成裝置1、2、3、4，例 如以CMYK的順序，沿著媒體的紙5搬運路徑5a的路徑配置。各 畫像形成裝置1、2、3、4對應於搬運路徑5a的部份，分別設置 轉寫裝置6、7、8、9，以將各色相顯像劑的畫像轉寫於紙5的 表面。由四色相顯像劑形成彩色畫像附在紙5的表面上’再搬 10運至定像裝置10，由加熱及加壓至少融化顯像劑之一部份’以 具有耐久性狀態形成彩色畫像附著在紙5的表面上。如第6圖所 示，由顯像劑所形成的彩色畫像，係以聚酉光亞胺等材質形成的 中間轉寫帶11表面，自四個畫像形成裝置1、2、3、4依次轉寫 顯像劑而形成，此間有彩色畫像顯像的顯像劑之形成’乃總括 15轉寫在面臨中間轉寫帶11的旋轉路徑，面臨於搬運路徑5b的 紙5表面而搬運到定向裝置時，在紙5表面定向。 對作爲大型的紙5者能夠形成圖像的裝置’搬運路徑5a ' 5b係大槪的成水平方向。在使用中間轉寫帶11的串列方式’係 作成中間轉寫帶11之循環路徑大槪爲向垂直方向變長形狀’酉己 20置畫像形成裝置1、2、3、4於上下方向，亦可以求節省設置空 間（例如，參照專利文獻一··日本國特開2001-331008號公報） 如第5圖及第6圖所示之依串列方式之彩畫像形成’係 續四工程由顯像劑執行畫像而形成，故有如下的問題： (1)在僅需要黑色的畫像時，CMY畫像形成裝置1、2 ' 3 ’ 1289740 8032-1A-TWP.doc-7/24 在第5圖中係使其從紙5之搬運路徑5a中離開，在第6圖中係需 要其從中間轉寫帶11中離開。爲了以電子照相方式形成畫像， 畫像形成裝置1、2、3、4需包含感光體，因而在黑色畫像形成 時，雖未使用CMY畫像形成裝置1、2、3之感光體，但其乃接觸 5於紙5或中間轉寫帶11，故由於此等磨損將會導致裝置之使用 壽命縮短者。 (2)爲了以直列執行四工程，其從最初的畫像形成之第一 個印字爲止皆要花費一些時間。啓動後，連續的畫像形成所謂 的管路線（Pipe Line)方式效應，以一個畫像形成裝置1、2、 10 3、4，將畫像形成所要花費的時間，係以比較高的速度來施 行。可是，緊接著啓動後初次的畫像形成，則需要以4個畫像 形成裝置1、2、3、4依次形成畫像的時間，變成需要連續的畫 像形成時之4倍時間。 在彩色畫像及黑白畫像形成之需求下，一般認爲黑白畫像 I5形成之需求方面較多，亦即預料黑白爲90%、彩色爲10%者。如 此黑白畫像形成之需求多時，特別是要將彩色畫像形成用畫像 形成裝置1、2、3之感光體，作成爲不磨損的情況變成比較重 要，但欲使3個畫像形成裝置1、2、3離開的機構會使之變成大 費周章者。又黑白畫像形成之需求多時，高速印字所需要的時 20間，或連續的畫像形成所需要的時間，亦即在黑白畫像形成時 間縮短的必要性遠高於彩色畫像形成時間的縮短。 【發明內容】 本發明之目的即在於提供一種畫像形成裝置，其能夠形成 1289740 8032-1A-TWP.doc- 18/24 【圖號說明】1289740 8032-1A-TWP.doc-6/24 After fixing, the image forming speed as a color image can be made fast. Fig. 5 and Fig. 6 are diagrams showing, in a tandem manner, a method of sequentially stacking images sequentially by respective color developing agents, and a stacking image of intermediates of respective color developing agents, and then collectively transferring them in The way the media is surfaced. As shown in Fig. 5, the image forming apparatuses 1, 2, 3, and 4 for forming a color image by electrophotography are arranged along the path of the paper 5 transport path 5a of the medium, for example, in the order of CMYK. Each of the image forming apparatuses 1, 2, 3, and 4 corresponds to a portion of the conveyance path 5a, and the transfer devices 6, 7, 8, and 9 are respectively provided to transfer the image of each color developer to the surface of the paper 5. A color image formed by the four-color phase developing agent is attached to the surface of the paper 5, and then transported to the fixing device 10, and at least one part of the developing agent is melted by heating and pressurization to form a color portrait in a durable state. Attached to the surface of the paper 5. As shown in Fig. 6, the color image formed by the developer is a surface of the intermediate transfer belt 11 formed of a material such as polytheneimine, and is sequentially rotated from the four image forming apparatuses 1, 2, 3, and 4. It is formed by writing a developer, and the formation of a developer having a color image development therebetween is a total of 15 transliteration on the rotation path facing the intermediate transfer belt 11, and is carried to the orientation device facing the surface of the paper 5 of the conveyance path 5b. When oriented on the surface of the paper 5. The apparatus "transport path 5a' 5b which can form an image as a large paper 5 is a horizontal direction of a large cymbal. In the tandem mode in which the intermediate transfer tape 11 is used, the loop path of the intermediate transfer tape 11 is made larger in the vertical direction, and the image forming devices 1, 2, 3, and 4 are placed in the vertical direction. It is also possible to save space for installation (for example, refer to Patent Document 1. Japanese Laid-Open Patent Publication No. 2001-331008). The color portraits in the series according to the fifth and sixth figures are formed. Since the developer is formed by performing an image, there are the following problems: (1) When only a black image is required, the CMY image forming apparatus 1, 2' 3 ' 1289740 8032-1A-TWP.doc-7/24 is in the fifth In the figure, it is removed from the transport path 5a of the paper 5, which is required to exit from the intermediate transfer belt 11 in Fig. 6. In order to form an image by electrophotography, the image forming apparatuses 1, 2, 3, and 4 need to include a photoreceptor. Therefore, when the black image is formed, the photoreceptors of the CMY image forming apparatuses 1, 2, and 3 are not used, but they are in contact with each other. 5 Transfer the tape 11 in the paper 5 or in the middle, so the wear life of the device will be shortened due to such wear. (2) In order to execute the four projects in series, it takes some time from the first print formed by the first portrait. After the start-up, the continuous image forms a so-called Pipe Line effect, and the time taken to form the image by one of the image forming apparatuses 1, 2, 10 3, and 4 is performed at a relatively high speed. However, immediately after the initial image formation, the four image forming apparatuses 1, 2, 3, and 4 need to sequentially form the image, which is four times as long as the continuous image formation is required. Under the demand for the formation of color portraits and black-and-white portraits, it is generally believed that the formation of black-and-white portraits I5 is more demanding, that is, 90% of black and white and 10% of color are expected. When there is a large demand for the formation of the black-and-white image, it is important to make the photoreceptors of the image forming apparatuses 1 and 2 for the color image formation unnecessary, and it is important to make the three image forming apparatuses 1 and 2 3, the institution that left will make it a big expense. When there are many demands for the formation of black and white portraits, the time required for high-speed printing, or the time required for continuous image formation, that is, the necessity of shortening the formation time of the black and white image is much higher than the shortening of the formation time of the color image. SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus capable of forming 1289740 8032-1A-TWP.doc- 18/24.
20彩色印刷機 22儲藏機構 24輸送機構 26彩色畫像形成單元 28黑白畫像形成單元 30中間轉寫帶 38載入輥輪 40控制器 50感光單元 52感光鼓 60 CPU 框體 供給機構 排出機構 光源單元 定像單元 畫像形成單元 作動器 操作面板 顯像單元 LED光源 18-20 color printer 22 storage mechanism 24 transport mechanism 26 color image forming unit 28 monochrome image forming unit 30 intermediate transfer belt 38 loading roller 40 controller 50 photosensitive unit 52 photosensitive drum 60 CPU frame supply mechanism discharge mechanism light source unit Image unit image forming unit actuator operation panel developing unit LED light source 18-