GB1434426A - Endless towing conveyor systems - Google Patents

Abstract

1434426 Power and free conveyer systems PFALZATAHLBAU GmbH 4 Dec 1973 [13 Dec 1972 3 Oct 1973] 56112/73 Addition to 1280450 Heading B7L In an endless chain towing conveyer system for conveying carts which are suspended from rollers 21 running on an overhead track 1 and moved by releasable coupling devices 2 depending from an endless chain 3 above the track 1, at least some of the rollers 21 being housed within caps 20 shaped to provide cam surfaces, e.g. 22 for releasing the coupling devices 2, each device 2 comprises a driving finger 12 pivotally mounted for movement to and from a normal cart-engaging position (shown in full lines) a latching lever 11 arranged to be displaced from a normal position (full lines) in which it locks the finger 12 in its cart-engaging position to a release position (dotted lines) in which the lever 11 permits the finger to pivot in one direction out of cap engagement (to dotted position) and an additional lever 25 for preventing cart over-run pivotally mounted to extend into the path of cap movement when in a normal position (full lines) abutting a stop member 27 but displaceable therefrom (to dotted position) by engagement with such a cap in the same direction as that in which the driving finger 12 is permitted to pivot on displacement of the latching lever 11 to its release position. As shown, the lever 25 carries a pin 29 which can engage end 13<SP>1</SP> of the lever 11 to displace the lever to its release position. The lever end 13<SP>1</SP>, which is counterweighted at 31, is thus displaced to free finger 12 when the lower end 28 of the lever 25 contacts a foregoing cart's cap 20 or a stop device at a station. Alternatively, Fig. 2 (not shown), the lever end 13<SP>1</SP> protrudes into the path of cap movement so that release is effected independently of the lever 25 which cannot contact the lever 11, the lever 25 being of the same shape as finger 12.