(57) An apparatus for switching over running directions of a running member (4,5) comprising
a plurality of pair of rails (1, 2, 3, 36, 37) each having a running surface (S) and
a groove (G) formed in the running surface, the running surfaces intersecting with
each other in the same plane, a plurality of running wheels (6, 7) each of which is
rotatably mounted on the running member, the running wheel having a tread surface
(10) which comes into contact with the running surface of the rail and a flange (11)
provided on the tread surface for engaging with the groove of the rail, turntables
(13) each provided for the associated running wheel on an intersection of the rails,
the turntable including a rotary disc (14, 44), a top surface of which is disposed
within the same plane and is provided with a plurality of diametrical grooves 116,17,
38 to 43) circumferentially and equiangularly spaced from each other, and wheel turning
mechanism (18, 27) provided on the running member for turning all of the running wheels
about the respective rotary axes with the flanges of the running wheels being engaged
with the radial grooves of the turntables.
|
|
