| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a trolley which can easily negotiate a level difference. <P>SOLUTION: An auxiliary wheel 10 with a smaller diameter than a rear wheel in parallel with the rear wheel 2a in the lower part of a rear leg rod 2 is prepared in a position which can be raised in a form that a rotary shaft is on the opposite side of a progress direction to the rotary shaft of the rear wheel 2a and in a form that a front wheel 1a or the front wheel 1a and the rear wheel 2a are not grounded in a condition that the auxiliary wheel 10 is grounded. Moreover, the rotation of the auxiliary wheel 10 is controlled as under one revolution and an elastomer for restoring to the original state after rotation is inserted. Furthermore, a bar member is prepared in the rear leg rod 2 in a way able to rock over the opposite side of the progress direction from the progress direction and in a form that the front wheel 1a and the rear wheel 2a can be raised in an ungrounded form in a condition that the lower edge of the bar member is grounded. <P>COPYRIGHT: (C)2007,JPO&INPIT |
