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    • 31. 发明授权
    • Document detecting device for an image forming apparatus
    • 用于图像形成装置的文件检测装置
    • US5016049A
    • 1991-05-14
    • US360480
    • 1989-06-02
    • Takashi OnishiHiroyuki HanamotoHirohisa MiyamotoKeiji Yoshida
    • Takashi OnishiHiroyuki HanamotoHirohisa MiyamotoKeiji Yoshida
    • G03B27/62G03G15/00
    • G03G15/5025G03B27/625G03G15/607G03G2215/00185
    • A document detecting device for an image forming apparatus operates when a sensor supporting arm equipped with sensors is pivoted to a predetermined position below a document, the document size or the density of the image is detected by the combination of the detection results of the sensors. One of the combinations which is not used for the document size or density detection is used to detect that the sensor supporting arm is at its original position. This construction avoids such an error that the sensor supporting arm is misinterpreted as being at its original position when an irregular sized document is set.When a new document is set, the data indicating the previous document size is accurately updated by the combined use of two switches. The first switch detects whether a document holding cover is opened less than a predetermined angle. The second switch detects whether the cover is completely closed. Thus, any potential errors which may occur when a new document is set by opening the cover less than the predetermined angle can be avoided.
    • 当装有传感器的传感器支撑臂枢转到文件下方的预定位置时,用于图像形成装置的原稿检测装置操作,通过传感器的检测结果的组合来检测图像的文档尺寸或密度。 使用不用于文件尺寸或密度检测的组合之一来检测传感器支撑臂处于其原始位置。 这种结构避免了当设置不规则尺寸的文件时传感器支撑臂被错误地解释为处于其原始位置的这种错误。 当设置新文档时,通过组合使用两个开关来准确地更新指示先前文档大小的数据。 第一开关检测文档保持盖是否打开小于预定角度。 第二个开关检测盖子是否完全关闭。 因此,可以避免当通过打开盖小于预定角度来设置新文档时可能发生的任何潜在错误。
    • 34. 发明授权
    • Original illumination device with an automatic illumination control
    • 具有自动照明控制的原始照明装置
    • US4711569A
    • 1987-12-08
    • US881460
    • 1986-07-02
    • Kadotaro NishimoriKeiji YoshidaTadashi Ohira
    • Kadotaro NishimoriKeiji YoshidaTadashi Ohira
    • G03B27/72G03G15/00G03G15/04G03G15/043G03G21/00
    • G03G15/5025G03B27/72G03G15/043G03G15/55
    • In an original illumination device with an automatic illumination control according to the present invention, light from an exposure lamp (6) illuminates an original (1) and a reference density plate provided on the lower surface of a table (2), reflected light from the original (1) is directed to a photosensitive drum (13), and reflected light from the original (1) and the reference density plate (3) is detected by a photo detector (14), whereby an MPU (17) controls power supply to the exposure lamp (6) by an exposure lamp regulator (19) based on the detection output of the photo detector (14). In addition, in case where a prescribed triggering signal is inputted to the exposure lamp regulator (19) and the photo detector (14) does not detect light, the MPU (17) determines that the exposure lamp (6) is broken, while in case where the prescribed triggering signal is not inputted to the exposure lamp regulator (19) and the photo detector (14) detects light, the MPU (17) determines that it is an abnormal lighting condition. Accordingly, the abnormal condition of the light source can be easily determined by a simple structure.
    • 在根据本发明的具有自动照明控制的原始照明装置中,来自曝光灯(6)的光照亮设置在桌子(2)的下表面上的原稿(1)和参考密度板,反射光 原件(1)被引导到感光鼓(13),并且由光电检测器(14)检测来自原稿(1)和参考密度板(3)的反射光,由此MPU(17)控制功率 基于光检测器(14)的检测输出,通过曝光灯调节器(19)向曝光灯(6)供给。 此外,在将规定的触发信号输入到曝光灯调节器(19)并且光检测器(14)未检测到光的情况下,MPU(17)确定曝光灯(6)被破坏,同时 MPU(17)判定为异常的照明状态的情况下,未将规定的触发信号输入到曝光灯调节器(19),光检测器(14)检测到光。 因此,可以通过简单的结构容易地确定光源的异常状态。