TRAVEL DEVICE AND OPENING POSITION VARIABLE PLATFORM FENCE

摘要

PROBLEM TO BE SOLVED: To prevent abrasion of a rolling surface biased to a certain wheel even when there is a place which is not parallel to right and left rails.;SOLUTION: A travel device 100 has a plurality of first load rollers 111 (wheels) that roll on a first rail on the first rail side of a body 101 which crosses first and second rails 11 and 12. A swing part 120 supported so as to alternately swing vertically at both ends in a traveling direction via a swing shaft 122 is provided to the second rail side of the body 101, and second load rollers 130 (wheels) that roll on the second rail are provided to both ends of the swing part. A state where all the second load rollers 130 roll in contact with the second rail is maintained through swinging of the swing part 120 even when there is a place where the first and second rails 11 and 12 are not parallel to each other.;SELECTED DRAWING: Figure 10;COPYRIGHT: (C)2019,JPO&INPIT