| 摘要 |
<p>TITLE CONTROLS FOR AERIAL LIFT PLATFORM APPARATUS INVENTOR John L. GROVE, Ernest J. MERZ, AND Charles W. WALTERS The present invention provides a control arrangement for the control members to control an aerial lift platform apparatus. A control console is provided which has a first surface which is slightly inclined to the horizontal and a second surface which is slightly inclined to the vertical. The control members which control vehicle movement, that is, drive and steering control members, are mounted on the near-horizontal surface, and extend generally vertically upwardly therefrom, although at a slight angle, for convenience. Movement of the upper end of the drive control lever in the forward direction causes the chassis to drive forward, and movement in the rearward direction causes movement of the chassis in the rearward direction. The steer control lever may be swung to the left to cause left steering of the chassis and swung to the right to cause right steering of the chassis, thereby providing a correspondence between lever movement and vehicle movement. All of the upper works control members are located in close physical proximity. The swing control lever swings about a near-vertical axis and thereby simulates and corresponds to the swinging movement of the upper works, left and right. A boom luffing control lever is provided which is mounted for vertical swinging movement, just as is the boom, with the lever extending from the near-vertical surface, in a generally horizontal manner, so as to generally simulate the position of the boom, with resulting movement of the boom luffing control lever resulting in movement of the boom in the same direction as the lever is moved. A boom extension control member is provided which is pulled toward the operator in order to cause extension of the boom, and is pushed away from the operator in order to cause retraction of the boom, these movements corresponding to the direction of movement of the workman's platform when the boom is extended and retracted. There may be provided, also, a platform rotate control lever for controlling platform rotation mounted for movement so that its free end moves in an arc, in the direction of movement of the platform, left or right. There is provided, also, a platform level override lever for controlling rotation of the platform about a horizontal axis adjacent the end of the boom, this lever being mounted on the near-vertical surface, and having up and down movement in a vertical plane in correspondence with the up and down rotation of the platform in a vertical plane.</p> |
