GB1137343A - Accumulating carrier for power and free conveyor system - Google Patents

Abstract

1,137,343. Accumulating conveyer carriers. MECHANICAL HANDLING SYSTEMS Inc. 6 Dec., 1965 [21 Dec., 1964; 11 Oct., 1965], No. 51711/65. Heading B7L. An accumulating load carrier for a factory conveyer system comprises a channel load frame 12 suspended by rotatable trolleys 16,17 from an overhead pair of inwardly or outwardly facing channel track beams 22 and a pusher dog 29 on the trolley 16 engageable by a depending pusher 30 of an overhead power chain (not shown) and vertically movable downwards out of engagement with the pusher 30 by the engagement of a bumper tongue 43 or other member with another object not on the carrier so as to accumulate the carriers, the dog 29 being formed with a pin 35 universally pivoted at 52, 54 to the counterweighted bumper tongue 43 so as to be rotatable relative thereto about an axis coincident with or parallel to, the axis along which the dog 29 is moved. In an embodiment, the bumper tongue 43 is engageable with and rotatable by a rear bumper member 47 of a preceding load frame 12. The lower end of the pin 35 is threaded at 54 for adjustable reception in a clevis pin 52 rotatably received in the tongue 43, which is pivoted at 42 to a bracket 13 on the frame 12. The pusher dog 29 is integral with a hold-back dog 31 which is cammed downwards by an overtaking pusher 30 to engage the drive. The trolleys 16, 17 are pivoted to the frame 12 by vertical ball bearings 39, 39<SP>1</SP>. In another embodiment, the bumper tongue is engageable with a rear bumper bar of a preceding load frame to disengage the power chain from the carrier, or a roller on the tongue may be engaged with a track side control unit to this end. The pusher dog is formed separately from the hold-back dog, the pusher dog being vertically guided by a roller on the wheel axle of the trolley and by a hardened roller on one of a pair of riveted pins which serve to hold together the identical side halves forming the trolley. The hold-back dog is pivotally counterweighted so that it can be overtaken by a chain pusher. A lug may constitute a driven dog for the carrier by which it may be impelled by a transfer conveyer into or out of an exit or entrance switch.