Abstract: Punch machine 30 has a plurality of punches 52, 53 and dies 54, 61 for punching a hole out of a sheet, a driving means 35 for reciprocating in a direction intersecting with respect to the punch by the driving force of driving source 33, and cam mechanisms 44, 84, 94, 62, 69 for changing the motion of the driving means into the movement direction of the punch so as to transmit to the punch between the punch and the driving means. A plurality of punches are divided into first group and second group. The cam mechanism provided between each punch of the first group and the driving means moves each punch 52 by the motion operation of the driving means in a first direction, and the cam mechanism provided between each punch of the second group and the driving means moves each punch 53 by the motion operation of the driving means in a second direction. Different pattern of punching is respectively possible by the first and second groups of punches.

Abstract: The self-propelled stairs moving unit A1 moves on stairs, putting a manual wheelchair K on the pallet 7, by driving the front crawler traveling units 1a, 1b and the rear crawler traveling units 2a, 2b wherein right and left are unitedly connected with each other. When the stairs moving unit A1 is started to go up to the stairs from the flat face of lower hand, the front crawler traveling unit 1a relatively gently goes up. Then, the angle between the pallet 7 to be held to be level with the connecting shaft 6 which is rotation center of the traveling unit 1a as its center of oscillation and the line connecting both connecting portions of the support frames 5a connecting the front and rear crawler traveling units 1a, 2a (that is, the self-propelled portion) is slowly changed.

Abstract: A power transmission chain includes a plurality of link plate units each composed of a pair of outer link plates and a plurality of inner link plates disposed inwardly of the outer link plates, a plurality of joint plates connecting the outer link plates and the inner link plates and coupling the link plate units in an endless loop pattern, and a plurality of power transmission blocks extending transversely across the link plates and supported by the inner link plates.