| 摘要 |
The most dangerous task in mechanically driving a post into the ground is initially holding the post in an upright position while it is hammered to start it into the ground. When used with mobile equipment having an hydraulically driven post pounder the post picker not only eliminates the danger in starting a post into the ground, but additionally eliminates the necessity of using more than one man to do the job! A method is disclosed wherein a single hydraulic valve on a piece of mobile equipment may be used to control both the post picker and pounder. The post picker comprises: a support arm having a base end portion secured to the post pounder and an opposite hinge end portion; a frame hinged to the hinge end portion of the support arm rotatable between a generally horizontal post grasping position and a hanging upright position; a jaw slidably mounted on a central portion of the frame; a hydraulic piston carried by the frame having one end operatively connected to the sliding jaw; and a frame lift mechanism to swing the frame from the hanging upright position to the horizontal grasping position.
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