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    • 10. 发明授权
    • Device for fastening screw onto workpiece and method of judging loosening of screw
    • 用于将螺丝固定在工件上的装置以及判断螺丝松动的方法
    • US09370848B2
    • 2016-06-21
    • US13609687
    • 2012-09-11
    • Toyoo Harada
    • Toyoo Harada
    • B23P19/06B25J9/16
    • B23P19/06B23P19/066B25J9/1679G05B2219/45091Y10T29/49764
    • In judging loosening of a crew, a measuring section measures a position of a bit as a relative position in relation to a placement surface of a screw supplying device when the screw is acquired from the screw supplying device. The measuring section also measures the position of the bit as a relative position in relation to a workpiece surface when fastening of the screw onto a workpiece has been completed. A judging section judges that screw loosening has not occurred when, based on the first and second bit positions, a difference between the first and second bit positions falls within an allowable range. The judging section judges that screw loosening has occurred when the difference does not fall within the allowable range.
    • 在判断机组的松动时,当从螺杆供给装置获取螺杆时,测量部分测量位的位置作为相对于螺钉供给装置的放置面的相对位置。 测量部分还在将螺钉紧固在工件上时,测量位的相对于工件表面的相对位置的位置。 当基于第一和第二比特位置,第一和第二比特位置之间的差值在允许范围内时,判断部分判断没有发生螺丝松动。 判断部判定当差不在容许范围内时发生螺丝松动。