ELEVATION SUPPORTING BOARD GUIDE DEVICE FOR EXPANDABLE LEADER

摘要

PURPOSE: To increase the max. elavation displacement of an elevator supporting board by suppressing the spreading of an arm during the time when a roller which is axially supported on an arm which is pivotally laid on the elevator supporting board rolls on a leader rail, while by allowing the turn of the arm in transfer. ;CONSTITUTION: When a roller 16 having both end collars transfers on a leader rail 9 from a leader rail 8 through the rise of an elevator supporting board 15, a cam folliwer 25 is driven by a cam 35 before the roller 16 reaches the upper end inclined part 8a of the leader rail 8, and the second stopper 23 is pulled into a cylinder 24 Then, the roller 16 transfers onto the leader rail 9 through the transfer of the collar on the leader rail installation part M, and the cam follower 25 is released from the cam 35, and the second stopper 23 is engaged with a stopper engagement part. The elevator supporting board 15 lowers from the state where the roller 16 is rolling- contact-engaged with both leader rails 9, and after the second stopper 23 is released from the stopper engagement part, the roller 16 transfers onto the leader rail 8, and the cam follower 25 is released, and the second stopper 23 is contact-engaged with the stopper engagement part again.;COPYRIGHT: (C)1996,JPO