Patent ID: 8046871

Claim:
A caster comprising: first and second wheels disposed forward and back and an endless wrap-around member wrapped around the first and second wheels, wherein the wrap-around member includes: a plurality of pieces continuous in a circumferential direction, each piece being provided with an outer peripheral section and an inner peripheral section which are moveable independent of the adjacent pieces and permit the wrap-around member to bend along the first and second wheels, and the outer peripheral section is adapted to contact the outer peripheral sections of the adjacent pieces when the wrap-around member pushed inside the surface of rotation by an external force, thereby preventing the wrap-around member from being depressed inside the surface of rotation in excess of a predetermined amount, wherein each of the pieces is formed with a depression serving as a wheel guide groove, and further comprising: a plurality of joint pieces equaling in number to the plurality of pieces, and a plurality of connecting shafts equaling in number to the plurality of pieces, wherein each of the joint pieces is provided with a front pipe section on a front side thereof, and a rear pipe section on a rear side thereof, and the front pipe section is offset in an axial direction of the wheels relative to the rear pipe section, so that the front pipe section of one joint piece and the rear pipe section of the adjacent joint piece are fitted into the wheel guide groove of each of the pieces, and wherein the pieces of the wrap-around member are connected together by having only a single one of the connecting shafts penetrating though each of the pieces and through the front pipe section of the one joint piece and the rear pipe section of the adjacent joint piece which are fitted into the wheel guide groove thereof.