| 摘要 |
<p>Apparatus and method to allow the wheels of a camera dolly (10,30) to be quickly and easily changed by a single person. A dolly jack (50) may have a leg (60) attached to a foot (52) and pivotable relative to the foot about a first axis. A jack rod (75) is attached to the leg (60) spaced apart from the first axis. An arm (64) may be pivotally attached to the leg (60) as desired, to provide greater mechanical advantage in lifting the camera dolly. Dolly wheels may be changed by inserting the jack rod (75) into a receptacle (24) on one side of the camera dolly, with the foot (52) of the jack on the ground and with the jack leg (60) substantially in a non-vertical position. The jack leg rotated into a second position wherein the jack leg (60) is substantially vertical, with the dolly rolling slightly in the direction of the rotation. This lifts the side of the dolly sufficiently so that the front and back wheels, or wheel pairs, on the one side of the dolly are lifted off of the ground, allowing the wheels to be changed.</p> |
