| 摘要 |
PURPOSE: A bicycle is provided to easily pass a road containing high obstacles. CONSTITUTION: Auxiliary wheels(22) having a smaller diameter than diameters of wheels(16,18) are installed. The auxiliary wheels(22) are located in front and rear portions of the wheels(16,18) by a first supporting frame(24) and a second supporting frame(26). The auxiliary wheels(22) are arranged in two rows to be contacted with a ground. The auxiliary wheels(22) are installed in a frame(12) to be removable. The supporting frames(24,26) are installed in the frame(12) to control angles of the auxiliary wheels(22). In contacting the front wheel(16) with the side of an obstacle, the auxiliary wheels(22) are contacted with the upper part of the obstacle by the supporting frames(24,26). In stepping a pedal(20), the front wheel(16) moves forward over the obstacle by rolling the front wheel(16) and the auxiliary wheels(22). |
