Storage and retrieval machine with pre-tensioned shuttle guides

Details Storage and retrieval machine with pre-tensioned shuttle guides Storage and retrieval machine with pre-tensioned shuttle guides

B - Operations, Transporting

66

F

B66F 9/07 (2006.01) B65G 1/04 (2006.01) B66F 9/14 (2006.01)

Patent

CA 2200827

A storage and retrieval machine has a telescopically extendible shuttle assembly which includes a plurality of linearly movable plates and a plurality of shuttle guide roller assemblies which accommodate non-linearities in the guide surface and other variations in clearance between the shuttle guide rollers and the corresponding guide surfaces of the shuttle assembly. Each shuttle guide roller assembly includes a spring, preferably a die spring, which biases the guide roller towards the guide surface but which permits limited deflection of the roller when it encounters bows, bumps, or other variations in linearity in the guide surface. The pre-tensioned guide rollers provide wear compensation, center the shuttle plates on their tracks, and assure adequate guidance of the shuttle plates during shuttle telescoping while preventing premature wear of the shuttle guide roller bearings and/or the guide surfaces.

Machine d'entreposage et d'extraction comportant une navette télescopique extensible comportant plusieurs plaques mobiles linéairement et plusieurs galets de guidage de la navette qui compensent le manque de linéarité de la glissière et d'autres variations dans l'espace libre entre les galets de guidage de la navette et les glissières correspondantes de la navette. Chaque galet de guidage de la navette comprend un ressort, de préférence un ressort matricé, qui polarise le galet de guidage vers la glissière, mais qui permet une certaine déviation restreinte du galet lorsqu'il y a des courbes, des bosses ou d'autres variations à la linéarité de la glissière. Les galets de guidage précontraints offrent une compensation à l'usure, centrent les plaques de la navette sur leurs rails et veillent à un guidage adéquat des plaques de la navette pendant le télescopage de la navette, tout en prévenant l'usure prématurée des roulements des galets de guidage de la navette et/ou des glissières.

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