To provide a wheel having not only a traveling function but also the function of riding over any obstacle by a device capable of lifting the wheel to an upper stair in a stairway by the turning motion of a motor around the wheel when the wheel hits the obstacle and the wheel is stopped.
A wheel is revolved around a rotating body hooked by a riser of a stairway. A brake which allows the wheel to be detached without being lifted high when the wheel rides over an upper stair hits a riser of the stair to allow a ratchet pawl going in/out of the wheel to go in/out of a blade of a ratchet 10 fitted to the wheel so as to be integrated and disintegrated with/from the wheel. Further, the rotating body is continuously fixed to the stairway while the wheel rides over by a mechanism in which a guide roller is placed on a guide having an arc-shaped outer circumference mounted to a motor to make one turn, and the rotating body is in a waiting state at a position where the rotating body can further in contact with the upper riser even after the wheel rides over the stair.
OKAMOTO NOBUKO
OKAMOTO KOTARO
OKAMOTO MARIKO
OKAMOTO NOBUKO
OKAMOTO KOTARO
OKAMOTO MARIKO
| JP2006306368A | 2006-11-09 | |||
| JP2002059844A | 2002-02-26 | |||
| JP2000043733A | 2000-02-15 | |||
| JPH1191575A | 1999-04-06 |