Creeping device of movable frog

摘要

Creeping device of the movable toe of frogs consists of the carriage (4) connected via the tenon (5) with the movable toe (2) of the frog (12) and pushed by a spring (6) with the wheels (41) to the cam route (3) on the bottom side of the board (9) detachably connected from bottom to wing rails (1).