In some embodiments, an apparatus includes: a motor disposed at an end of a dummy moving path with a shaft being parallel to the ground; a bevel gear with a driving gear and a driven gear which mesh each other, motive power being input from the shaft to the driving gear; a synchronous belt comprising at least two belt wheels and an endless belt, one belt wheel including a shaft perpendicular to the ground and obtaining a motive power input from the driven gear, the other belt wheel being disposed at the other end of the dummy moving path, and belt teeth on an inner circumferential surface of the endless belt respectively meshing with teeth grooves on an outer circumferential surface of said at least two belt wheels; a movable platform connected to a tight side of the endless belt, a dummy being connected on a surface of the platform.