Patent ID: 7255218
Filing Date: 2007-08-14
Classification: B65G

Abstract:
1. A circulation type line-up conveying apparatus, comprising: a cantilever type main conveying conveyor in which a plurality of conveying rollers rotated by a non-contact type power transmission system are obliquely arranged side-by-side along a side of a side plate arranged on one side of the rollers in an axial direction, and a width of the main conveyor at least in the vicinity of a downstream end portion of the main conveyor in a conveying direction is made narrower than a width of an upstream end portion of the main conveyor; a return conveying conveyor formed of a plurality of side-by-side cantilever type conveying rollers rotating in a direction opposite to the direction of the main conveyor, the return conveyor having an open upstream side portion arranged alongside an open downstream side portion of said main conveyor; and a delivery conveying conveyor configured for transferring to the upstream end of the main conveyor objects which have been conveyed by the return conveyor from the downstream end of the main conveyor, wherein the delivery conveyor is arranged between the upstream end portion of the main conveyor and a downstream end portion of the return conveyor; and wherein the delivery conveyor is comprised of: a plurality of conveying rollers each comprising a tubular member made of non-magnetic material, a ring of a permanent magnet fitted and fixed inside said tubular member, a bearing is fitted and fixed inside the tubular member on both sides in the axial direction, and over the bearings on both sides thereof, a supporting shaft is fittingly provided to make the tubular member freely rotatable; and a plurality of driving magnetic wheels each corresponding to the permanent magnet of a respective one of said conveying rollers, are arranged to intersect an outer peripheral surface of the conveying roller in a non-contact state therewith and freely rotatable in proximity thereto in such a manner that the conveying rollers are rotated by rotations of the driving magnetic wheels.