To stably tighten a rail.

A moving machine is provided with a water treating machine moved onto each water treating tank, a driving means arranged in the water treating machine and for reciprocating a rod 113, a link mechanism for converting the reciprocating motion of the rod 113 into the oscillating motion, a clamp 139 for tightening a rail 13 by the oscillating motion, and a force accumulating device 137 arranged between the rod 313 and the link mechanism and provided with a compressing member and also for accumulating the tightening force of a clamp 139 by the compressing force of the compressing member. The force accumulating device 137 accumulates the tightening force of the clamp 139 by the compression force of the compression member.