Conveyors: power-driven – Conveyor section – Endless conveyor
Patent
1988-05-19
1990-04-10
Valenza, Joseph E.
Conveyors: power-driven
Conveyor section
Endless conveyor
B65G 1510
Patent
active
049152130
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement in a belt conveyor having at least one endless belt and two tensile force (longitudinal)-absorbing members extending throughout the entire length of the belt conveyor and being each connected to a respective edge portion of the belt and projecting from the plane of said portion for cooperation with guide rollers determining the path of travel of the belt conveyor which is sealed over at least part of its length at a longitudinal edge thereof.
A belt conveyor of this type is previously known, e.g. from GB patent specification No. 970,253 describing a single-belt conveyor having two V-belt-shaped tensile force (longitudinal)-absorbing members which in the straightened state of the belt project from one and the same side of the belt at the longitudinal edges thereof. This prior-art belt conveyor confers substantial advantages, for instance in that the goods conveyed can be transported in a protected fashion on a central part of the belt depending in a bag-like manner between the tensile force (longitudinal)-absorbing members. This belt conveyor is however disadvantageous in so far as it allows no vertical conveyance of the goods and especially no easy transition from a horizontal direction of conveyance to a more or less vertical direction of conveyance, and vice versa. Furthermore, this known belt conveyor construction necessitates guide rollers for holding together or sealing a longitudinal edge.
The object of the present invention is to overcome the above-mentioned shortcomings inherent in the known belt conveyor construction. The inventive arrangement should thus allow easy transition from a horizontal direction of conveyance to a substantially vertical direction of conveyance, and vice versa. It should also provide for improved and less expensive sealing of one longitudinal edge of the belt conveyor.
According to the present invention, these and other objects are achieved in an arrangement of the type stated in the introduction to this specification, in that one edge portion of the belt, along the sealed part of the length of the belt conveyor, overlaps and extends outside the other edge portion of the belt, with its tensile force (longitudinal)-absorbing member projecting in the same direction as the tensile force (longitudinal)-absorbing member of the other edge portion of the belt.
The arrangement according to the invention can be used both in a single-belt conveyor and in a two- or multi-belt conveyor. In a single-belt conveyor, the inventive arrangement is achieved in that the two tensile force (longitudinal)-absorbing members of the belt are so designed as to project from opposite sides of the belt when in its straightened state. This particular belt is also usable in a two- or multi-belt conveyor. The two-belt conveyor may use two identical belts which are offset in relation to each other transversely of the direction of travel of the conveyor a distance which corresponds at least to the width of one tensile force (longitudinal)-absorbing member. A two-belt conveyor may however also use two belts, each having two tensile force (longitudinal)-absorbing members which project from the same side of the respective belt in the straightened state thereof. In accordance with the invention, the width of one belt must then exceed the width of the other belt by at least the total width of its two tensile force (longitudinal)-absorbing members.
A single-belt conveyor using the inventive arrangement is particularly advantageous in that the two tensile force (longitudinal)-absorbing members along a vertical part of the path of travel of the belt conveyor, can be twisted about each other between two of the guide rollers of the belt conveyor which determine the path of travel thereof. By twisting the tensile force (longitudinal)-absorbing members about each other, such reliable sealing is obtained as to allow vertical conveyance of goods. In a two-belt conveyor, vertical conveyance can be performed without the belts being twisted about each other, although this alte
REFERENCES:
patent: 3164238 (1965-01-01), McCullagh
Loodberg Jan A. T.
Siwersson Olle L.
Wall Arne E.
AB Scaniainventor
Valenza Joseph E.
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