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    • 98. 发明授权
    • Zigzag sewing machine with fabric-edge tracing function
    • Zigzag缝纫机具有织物边缘跟踪功能
    • US4664048A
    • 1987-05-12
    • US859810
    • 1986-05-05
    • Nobuyuki NaganumaYasuhiro Shimizu
    • Nobuyuki NaganumaYasuhiro Shimizu
    • D05B3/02D05B21/00D05B69/00D05B73/12
    • D05B3/02D05B73/12
    • A zig zag sewing machine having a feed device for feeding a workpiece in a feed direction on a work bed, an endwise reciprocable needle bar for carrying a needle, and a support member joggable laterally with respect to the feed direction and supporting the needle bar, including a detector having a light emitting portion and a light receiving portion and disposed on the support member for detecting the edge of the workpiece extending in the feed direction. The detector is movable laterally with respect to the feed direction in a predetermined positional relation with the support member at least when the support member is laterally moved. The lateral positions of the support member and the detector are changed by a driving device which is controlled so that an amount of light received by the light receiving portion coincides with a predetermined amount, whereby successive stitches to be formed by the needle are placed on a line which is away from the workpiece edge by a predetermined constant distance.
    • 一种锯齿缝纫机,具有用于在工作台上沿进给方向馈送工件的进给装置,用于承载针的端部往复运动的针杆和相对于进给方向横向移动并支撑针杆的支撑构件, 包括具有发光部分和光接收部分的检测器,并且设置在支撑构件上,用于检测在进给方向上延伸的工件的边缘。 至少当支撑构件横向移动时,检测器可相对于进给方向以预定的位置关系相对于支撑构件移动。 支撑构件和检测器的横向位置被驱动装置改变,驱动装置受到控制,使得由光接收部分接收的光量与预定量重合,由此由针形成的连续针迹放置在 线远离工件边缘预定的恒定距离。