| 摘要 |
A switching device for a transporting track on which a pallet travels supported on a cushion of air which includes a rotatable track having air jets to support the pallet and which is supported on an air bearing, a first linear motor for turning the air bearing, a second linear motor for driving and braking the pallet and a positioning device for accurately positioning the rotatable track in alignment with a fixed regular track. The switching device allows a pallet, which is supported on a cushion of air and which is driven along a fixed track by a linear motor, to be driven in a different direction by stopping the pallet on the rotatable track with a second linear motor, stopping the supply of air to the rotatable track so that the pallet is supported directly on the rotatable track, turning the air bearing and rotatable track with the first linear motor in a desired direction, accurately positioning the rotatable track with the positioner, interrupting the supply of air to the air bearing to prevent further rotation thereof, supplying air to the rotatable track to support the pallet on an air cushion and driving the pallet onto another fixed track with the second linear motor.
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