Conveyors: power-driven – With means to facilitate working – treating – or inspecting... – Means to convey a palleted load back and forth between an...
Patent
1989-10-11
1991-02-26
Skaggs, H. Grant
Conveyors: power-driven
With means to facilitate working, treating, or inspecting...
Means to convey a palleted load back and forth between an...
1984651, B65G 3700
Patent
active
049955020
ABSTRACT:
A pallet changer includes a support, a table movable on the support along one direction, a plurality of pallets for holding a workpiece, a drive mechanism for moving the table, a transfer device for moving the pallet along the one direction relative to the table. The transfer device comprises a pinion shaft rotatably mounted on the table, the pinion shaft having sprockets at opposite ends thereof and a pinion at an intermediate portion thereof, a rack member movably mounted on the support, a rack displacing member mounted on the support for moving the rack member between a first position wherein the rack member can engage the pinion and a second position wherein the rack member can disengage the pinion, counter sprockets rotatably mounted on the table each cooperating with the sprocket of the pinion shaft, chains each placed between the sprocket and the counter sprocket, and an engaging mechanism for detachably engaging the chains and the pallet. The engaging mechanism includes chain hooks fixed to the chains and pallet hooks fixed to the pallet. When the rack is in the first position and the chain hook engages the pallet hook, the table is moved along the one direction by the drive mechanism so that the pinion is rotated and moved along the one direction relative to the rack, whereby the sprockets and the chains are rotated so that the pallet is moved along one direction relative to the table by drive force of the drive mechanism.
REFERENCES:
patent: 4279337 (1981-07-01), Kachnik
patent: 4498571 (1985-02-01), Nomura et al.
patent: 4715490 (1987-12-01), Date et al.
patent: 4797989 (1989-01-01), Cherko
patent: 4799582 (1989-01-01), Itoh
Gastineau Cheryl L.
Kananen Ronald P.
Kitamura Machinery Co. Ltd.
Skaggs H. Grant
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