Self-lifting vertically rising mast
View Patent ↗A self-lifting vertically rising mast provides a possibility to be erected without use of high cranes. An improved self-lifting vertically rising mast includes at least three of a plurality of main frames and at least three of a plurality of main supports, wherein each main frame is rigidly connected to the appropriate main support and comprises the base, U-form directors, lifting shoe inserted into the U-slots of the U-form directors, the hydraulic jack installed on the base of the main frame, pusher including the rests, hollow upright leant on the sleeve of the bush, comprising the pivotable portion having the slots providing passage for the rests, the pair of the guiding shoes longitudinally movable along the auxiliary directors, the holder located between the auxiliary directors and fixing the appropriate upright in the vertical position, and the controllable supports, comprising the stand, the extendable screw, and the nut, which fixes the desirable position (extension) of the extendable screw.
1. A self-lifting vertically rising mast including
at least three of a plurality of main frames rigidly connected to each other by main supports, and wherein each of said main frame comprises
a base rigidly connected to a left side plate and a right side plate, each of which includes an U-form director comprising an U-slot, and wherein each of the U-form directors is rigidly connected to an appropriate auxiliary director;
a lifting shoe inserted into said U-slots of said U-form directors, and wherein an upper surface of said lifting shoe includes a hemispherical cavity;
a hydraulic jack 3 installed on said base of said main frame, and wherein an extendable rod of said hydraulic jack is coupled with a lower surface of said lifting shoe;
at least two of a plurality of controllable supports, each of which comprises a stand, an extendable screw and a nut fixing the extended position of said extendable screw;
a pusher installed in said hemispherical cavity and coupled with said lifting shoe by a bracket and with a sleeve, and wherein said pusher includes at least two of a plurality of rests rigidly connected to said pusher;
a hollow upright installed in said sleeve, and wherein inside of said hollow upright is inserted said pusher;
a bush comprising a pivotable portion including at least two of a plurality of slots, providing a passage for said rests, and at least two of a plurality of ledges, and wherein said bush is coupled with said pusher;
a holder installed between the auxiliary directors to provide a fixation of said upright in the vertical position, and wherein said holder is coupled with said upright by an auxiliary cramp.
2. The device of claim 1 , wherein the longitudinal distance between said rests is adequate to the length of the fully extended rod of said hydraulic jack.