| 主权项 |
1. A nut feeding system for feeding a nut to a predetermined feeding position comprising:
a posture alignment device configured to align the loaded nut to a posture in which an axis line of the nut is vertically directed; a supply placing unit provided at the feeding position and configured to place thereon the nut in a posture in which the axis line of the nut is vertically directed; and a transfer device configured to transfer the nut aligned to the posture by the posture alignment device towards the supply placing unit, wherein the posture alignment device comprises;
a sliding container unit having an inner circumferential face gradually decreasing a diameter from an upper end opening towards a lower end opening, in which the nut loaded from the upper end opening slidingly drops to the lower end opening,a rod shaped advance-retreat member extending vertically and provided so as to freely advance and retreat from the lower end opening towards the upper end opening of the sliding container unit,an advance-retreat driving mechanism configured to drive the advance and retreat of the advance-retreat member,a nut mounting face formed at an upper end of the advance-retreat member and configured to be able to mount one end in the axial line direction of the nut,an insert pin arranged to stand on the nut mounting face and configured to insert in a screw hole of the nut on the nut mounting face and to maintain the mounting state of the nut in the posture in which the axis line of the nut is vertically directed on the nut mounting face,a nut detection sensor configured to detect the nut mounted on the nut mounting face with the insert pin inserted in the screw hole, andan alignment control unit configured to repeat the advance and retreat motion of the advance-retreat member by the advance-retreat driving mechanism until the nut detection sensor detects the nut, and to raise the nut on the nut mounting face higher than the upper end opening of the sliding container unit via the advance-retreat member by the advance-retreat driving mechanism when the nut detection sensor detects the nut, and wherein the transfer device comprises;
a nut retention mechanism configured to releasably retain the nut, anda transfer control unit configured to retain the nut on the nut mounting face by the nut retention mechanism, and to release the nut from the insert pin to transfer, when the nut is raised higher than the upper end opening of the sliding container unit by the advance-retreat member of the posture alignment device. |
