Conveyors: power-driven – Conveyor section – Endless conveyor
Patent
1986-11-03
1988-03-22
Spar, Robert J.
Conveyors: power-driven
Conveyor section
Endless conveyor
198839, B65G 2110
Patent
active
047322675
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a transport installation, in particular a conveyor belt, with a conveying track substantially disposed in a horizontal extending plane and having a curvature, in which installation the conveying means, for example a conveyor belt designed to receive the transported material, extends continuously through the conveying track and is supported in a frame having at least one roller station equipped with at least one rotatable roller extending crosswise relative to the direction of conveyance and being mounted for pivoting around an axle extending in and parallel to the direction of conveyance.
In such a transport installation, which is known from German patent DE-PS No. 622 057, the individual roller stations, which have rollers arranged in the form of a trapeze are supported on an axle mounted beneath the conveying track and extending in the direction of conveyance. However, such a system has a drawback in that when the tensile load acting on the conveyor belt increases, a force acts on the rollers disposed on the inside of the curve of the conveying track, such force acting towards the center of the curvature of such track, which causes the rollers to tilt downwardly, so that the frames supporting the rollers have to be connected with the axle in such a way that they are secured against twisting, or secured against tilting in some other way, for example with the help of stop means limiting the swivel motion of the frame, in order to prevent the conveyor belt from slipping off. To accomplish this, however, the tilt of the individual frames so fixed has to be adapted to an average load and speed of the conveyor belting. This, however, has the drawback that if the load deviates from such average load, the crosswise tilt, which is also referred to as the "camber", will only very incompletely satisfy the actual conditions.
The object of the invention is to avoid such drawback and to propose a transport installation of the type specified above that permits within the zones of the curves of the track a crosswise tilt depending on the load acting on the conveying tracks.
According to the invention, this is accomplished by providing the installation with a plurality of roller stations, which are mounted immovable in the direction of conveyance, and by mounting the roller stations disposed within the zone of the curvature in such a way that the latter are capable of freely swinging around an axis extending in the direction of conveyance in accordance with the forces generated and arranged above the conveying track in a known manner, and the path of swivel of such roller stations ascends or rises towards the center point of the curvature of the conveying track crosswise relative to the direction of conveyance. In this way, the crosswise tilt of the conveying tracks is largely depending on the free play of the forces produced, resulting in a lift of the rollers disposed on the inside of such roller stations due to the fact that the path of swivel extending transversely relative to the direction of conveyance rises towards the center point of the curvature of the conveying track when the force acting on the conveyor belt increases, which safely prevents the conveyor belt from slipping off.
In such an installation, the roller stations may be arranged suspended on a physical axle mounted above the conveying track.
According to another feature of the invention, the roller stations or their frames may have a substantially circular shape and be supported on two roller stands, which are spaced apart in the crosswise direction relative to the conveying track, and whose axles supporting the rollers are aligned substantially parallel with the conveying track.
This permits a very simple arrangement of the transport installation with bearing points that are, relatively speaking, readily accessible, so that the required maintenance work can be carried out without great expenditure.
In this preferred embodiment of the invention, the frame may have an angle-shaped bottom girder, and the rollers of the roller st
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patent: 3212626 (1965-10-01), McLeish et al.
patent: 3612257 (1971-10-01), Goergen et al.
patent: 3856133 (1974-12-01), Dyachkov
patent: 4339031 (1982-07-01), Densmore
patent: 4526272 (1985-07-01), Peterson
Binder & Co. Aktiengesellschaft
Dayoan D. Glenn
Kelman Kurt
Spar Robert J.
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