Patent ID: 7258227
Filing Date: 2007-08-21
Classification: B65G

Abstract:
1. A drive for a conveyor belt, that travels along a travel frame and is provided with at least one transport chain, comprising: transport means for said belt; elongation recovery means for recovering any elongation of said belt; and a box shaped body for containing the drive, and wherein said elongation recovery means are constituted by a supporting element for said transport means, by at least one sliding guide, and by elastic tension-preventing means for the belt, said supporting element floating adjacent to said belt and being coupled to said box-like body by way of said at least one sliding guide and by way of said elastic tension-preventing means, said transport means comprising a flexible transmission element, a driving pulley rigidly coupled to the frame and engaged with said flexible transmision element, and at least one driven pulley pivoted to said floating supporting element adjacent to said belt, said flexible transmission element being arranged so as to surround said at least one driven pulley, and transport tabs which are reversibly engageable with links of said at least one transport chain, said transport tabs being providable on any of said flexible transport element and said at least one driven pulley, said floating supporting element being constituted by a bar that is substantially parallel to said belt in said at least one slider that is slidable in a direction substantially parallel to said belt in said at least one sliding guide, said at least one slider supporting said at least one driven pulley, a free end of said bar being coupled by way of said elastic tension-preventing means to a wall of said box-shaped body, and said elastic tension-preventing means being constituted by a traction spring, which is fixed, at one end thereof, to said free end of said bar and is arranged so as to surround coaxially a trailing end of the bar that protrudes from said wall out of said box-shaped body, and to be locked to said wall on a side thereof inside said box-shaped body.