GB672191A - Improvements in or relating to conveyors - Google Patents

Abstract

672,191. Endless scraper conveyers. EICKHOFF MASCHINENFABRIK UND EISENGIESSEREI, GEB. Sept. 15, 1950. [Sept. 15, 1949 ; Feb. 23, 1950] No. 22687/50. Class 78 (i). An endless-chain conveyer consists of a plurality of link-pin type chains disposed immediately adjacent to each other in a conveyer trough to form a chain assembly which extends along the central portion of the trough, the assembly being provided with scrapers which project laterally from each side of the assembly. In one form, Fig. 4, two endless chains 1, 2 have common link-pins 7 some of which are elongated to take the scrapers which are secured in place by nuts 8. The assembly travels in a two-part casing 15, the outer ends of the scrapers being provided with antifriction collars 13. In another form, Fig. 8, two chains are provided each with its own linkpins except at the scrapers where common elongated pins are used as in Fig. 4 ; the scrapers are in one piece with a cut-out to accommodate the chains. The scrapers travel on the upper run in a trough 23 at each side of which is an inverted U-shaped channel 22, and on the lower run in a trough 25 detachable from the upper casing. The casing is made in sections, Figs. 9 and 10, and the couplings between sections are housed within the channels 22 so that the sides of the casing are smooth. The couplings each consist of two plates 27, one secured within one section of the channel 22 and one within the adjoining section of the channel, and two plates 28, one secured to each section of the trough 25, the four plates being coupled by a bolt 31 provided at each end with a lug 30 which is passed through a keyhole 29 in each plate, the bolt being afterwards turned to prevent return. The couplings thus connect the upper trough to the lower trough in addition to coupling together adjacent sections. In a further form of endless structure, Figs. 13 and 14, two short lengths of chain 33, 34 are provided between adjacent scrapers, the two parts 45 of each scraper being secured by elongated pins 37 to one end of each chain length, while the other ends of the chain lengths, which terminate in inner links 36 are fixed to an inverted U- shaped bracket 43. This latter is provided with a lug 39 which is connected by a vertical pivot 40 to a pair of embracing lugs carried by a similar bracket 38 secured, together with the scraper parts, to the first-mentioned ends of the chain lengths. The assembly is driven by a pair of sprockets, not shown, one engaging each chain length. On the sprockets engaging the ends of the lengths, they pass freely on to the next two lengths without it being necessary to remove any of the sprocket teeth.