RUNNING WHEEL DEVICE

PROBLEM TO BE SOLVED: To prevent the running wheel device from rattling when it is rotated by letting each omnic wheel be carried by second pivot members which are mounted onto both sides of the tip end part of each mounting member in such a way as to be hanged over in an overhanged shape, also forming each omnic wheel in a conical shape, and concurrently, making a gap small between the two adjacent wheels at a place close to their apex parts. SOLUTION: Each running device 11 is made up of a first pivot member (running shaft) 15 which is rotatably carried by each running motor 13 via gears, a plurality of stem shaped mounting members 16 mounted to the first pivot member, second pivot members 17 provided for both sides of the tip end of each mounting member 16 in such a way as to be over-hanged, and of each omnic wheel 21. Each omnic wheel 21 is carried by second pivot members 17 in a overhanged shape each, and each omnic wheel is formed into a conical shape (half egg shape). As a result, a gap between the two adjacent omnic wheels at a place close to their apex parts, can thereby be made small, and rattling of each running device 11 can be lessened to a minimum even when the devices are rotated.