Lifting mechanism for an apparatus for lifting construction plates, lifting apparatus comprising this mechanism, and lifting method using this apparatus
AssigneeEtablissements Pierre Grehal Et Cie SA
InventorLionel MARCON
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Abstract
The present invention proposes a silent, safe, fast, multi-purpose and easy-to-service lifting mechanism. For this purpose, the mechanism comprises: a telescopic mast with a fixed segment (11) and a first telescopic segment (12) mounted so as to slide inside the fixed segment; a rack (13) having a set width and provided with teeth (131), which is attached to the first telescopic segment; a gear system comprising: a pinion (21) directly meshed with the rack, a driving shaft (22) which meshes with the pinion and is attached to a steering wheel, a reversible locking means for the driving shaft, designed to lock the driving shaft against rotation as long as no action is taken by a user.
Claims20
A lifting mechanism (100) comprising, with reference to the position of use:
- a telescopic mast (10) which comprises a fixed segment (11) and a first telescopic segment (12) which is mounted so as to slide in the interior of the fixed segment (11);
- a rack (13) which has a set width (Lc), is provided with teeth (131) and is fixed to the first telescopic segment;
- a gearing system (20) comprising:
- a pinion (21) which is in direct engagement with the rack (13);
- a control shaft (22, 22a-22b) which is in engagement with the pinion (21) and is fixed to a control wheel (23);
- a means (50) for reversibly locking the control shaft, provided for blocking the rotation of the control shaft in the absence of any action on the part of a user.
Dependencies are inferred from the claim text.