초록 ▼

Method and apparatus for removing construction piles in which a clamp mounted in a hollow head grips opposite sides of a pile, and the head is vibrated vertically by means of a vibrating hammer which is clamped to the head so that the head moves up and down as a unit with the hammer to loosen the pi

Method and apparatus for removing construction piles in which a clamp mounted in a hollow head grips opposite sides of a pile, and the head is vibrated vertically by means of a vibrating hammer which is clamped to the head so that the head moves up and down as a unit with the hammer to loosen the pile. The vibrating hammer is suspended from a crane cable which, after loosening the pile, is raised to easily remove the pile. In commercial situations where many piles are to be removed from one area, it is preferred that the present invention be used to loosen the piles, leaving complete withdrawal of the piles to a conventional choker operated by a second crane which follows the first crane carrying the vibrating hammer and clamping head of the present invention. In one embodiment, the clamp head includes a generally hollow steel casing movable over the top of the pile to a point limited by a horizontal plate fixed across a top portion of the casing. A pair of clamping shoes are provided in the casing below the top plate to grip opposite sides of the pile. One of the shoes is movable across the casing towards and away from a fixed shoe, preferably by a hydraulic jack or fluid motor that may be powered from any suitable source. To guide the movable shoe, a pair of anchor bars are fixed across the casing to slidably receive the movable shoe and maintain it accurately aligned with the fixed shoe as well as to transmit forces from the pile to the steel casing of the clamp head.

대표청구항 ▼

A clamp head for gripping solid wood or concrete construction piles comprising in combination; a casing having a hollow lower portion for receiving piles with the casing surrounding the pile, a pair of opposed gripping shoes in the casing for receiving a pile therebetween and gripping opposite sides

A clamp head for gripping solid wood or concrete construction piles comprising in combination; a casing having a hollow lower portion for receiving piles with the casing surrounding the pile, a pair of opposed gripping shoes in the casing for receiving a pile therebetween and gripping opposite sides thereof, the pile contacting surfaces of the gripping shoes being shaped to coRrespond to the contour of the pile to be gripped, means including a motor mounted to the casing for moving at least one of said gripping shoes towards and away from the other gripping shoe for gripping and releasing a pile therebetween, mounting means in the casing receiving said one gripping shoe for maintaining and guiding said one gripping shoe for movement in a horizontal plane across the casing towards and away from the other gripping shoe, coupling means on the casing for releasably securing to the casing a device for imparting movement to the pile through the clamp head when a pile is gripped by said shoes, and a stop member fixed in the casing above the shoes for limiting the uppermost position of a pile in the casing.