Position detecting device and image forming apparatus
    3.
    发明公开
    Position detecting device and image forming apparatus 有权
    位置检测装置和图像形成装置

    公开(公告)号:EP1882989A2

    公开(公告)日:2008-01-30

    申请号:EP07113164.3

    申请日:2007-07-26

    IPC分类号: G03G15/01

    摘要: A position detecting device includes a plurality of detecting units (6a, 6b) that detects marks on an object (10), a plurality of housing units (1011, 1012) that houses the detecting units (6a, 6b), and a holding member (1005) that fixedly holds the housing units (1011, 1012) . A total expansion amount of the housing units (1011, 1012) due to temperature change is substantially equal to an expansion amount of the holding member (1005) between the fixed positions due to temperature change. The total expansion amount represents a total amount of expansion of the housing units (1011, 1012) from a fixed-position plane including a fixed position to a detection-position plane including a detection position in a direction parallel to a moving direction of the object (10). The fixed-position plane and the detection-position plane are perpendicular to the moving direction of the object (10).

    摘要翻译: 一种位置检测装置包括:检测物体(10)上的标记的多个检测单元(6a,6b);容纳检测单元(6a,6b)的多个壳体单元(1011,1012);以及保持构件 (1005),其固定地保持壳体单元(1011,1012)。 由温度变化引起的壳体单元(1011,1012)的总膨胀量基本上等于由于温度变化而引起的固定位置之间的保持构件(1005)的膨胀量。 总膨胀量表示壳体单元(1011,1012)从包括固定位置的固定位置平面到包括与物体的移动方向平行的方向上的检测位置的检测位置平面的总扩张量 (10)。 固定位置平面和检测位置平面垂直于物体(10)的移动方向。