Conveyors: power-driven – Conveying apparatus entirely supported by mobile ground... – Conveyor shiftably mounted on vehicle
Patent
1990-01-23
1991-09-03
Olszewski, Robert P.
Conveyors: power-driven
Conveying apparatus entirely supported by mobile ground...
Conveyor shiftably mounted on vehicle
198632, 1988612, 414523, 414528, B65G 1526
Patent
active
050444840
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an endless conveyor elevator with a foldable support frame and is particularly, though not exclusively, concerned with a troughed-belt conveyor elevator having such a support frame.
Troughed-belt conveyors are commonly used to transport and to elevate bulk materials such as coal, soil, gravel and mineral ores, and the plant used for processing such bulk materials commonly incorporates such troughed-belt conveyors. When a processing plant which contains one or more troughed-belt conveyors is intended to be capable of being readily moved from place to place, either upon one site or betwen different sites, it is frequently found that size of the conveyors renders the plant unwieldy and difficult or impossible to move, especially if the plant is to be moved along public roads where there are legal limitations to the maximum overall dimensions of vehicles. Accordingly, there is a need for types of troughed belt conveyor which are readily foldable.
Hitherto, manufacturers of portable processing plant have used various means for constructing foldable frameworks for troughed belt conveyors, each more or less suited to the particular item of plant into which it is intended to be incorporated, and typically employing a telescopic or a hinged portion or a means for folding the conveyor sideways. However, such conveyors are often awkward or dangerous to fold and deploy, and when deployed they are often limited to less than optimum lengths by shortcomings of the folding mechanisms.
The present invention therefore seeks to provide a foldable support frame in or for an endless conveyor elevator, which is particularly simple and safe to operate between a folded transport position and an unfolded working position.
Desirably, the support frame should be such that the ratio between the open and the folded size envelopes should be exceptionally large. Also, desirably, the framework does not require assistance from an operative or an external lifting means when folding or deploying.
According to one aspect of the invention there is provided an endless conveyor elevator having a foldable suport frame and which comprises:
a chassis:
a tail conveyor portion pivotally mounted at one end on the chassis and intended to form a lower input end of the elevator;
a head conveyor portion intended to form an upper discharge end of the elevator;
an intermediate conveyor portion pivotally connected to the tail portion and to the head portion;
at least one link member pivotally connected at one end to the chassis and at its other end to the conveyor in the region of the pivotal connection between the head conveyor portion and the intermediate conveyor portion; and
an actuator coupled with the conveyor elevator and operable to move the conveyor portions between an inoperative folded position and an unfolded working position;
in which the geometry of the conveyor portions and the link member, and the mounting of the tail conveyor portion and the link member on the chassis are such that;
when the conveyor elevator is in its folded inoperative position the tail conveyor portion is constrained to extend substantially horizontally over the chassis; the intermediate conveyor portion is constrained to extend upwardly of the tail portion; and the head conveyor portion is constrained to extend substantially horizontally of the upper end of the intermediate conveyor portion; and
when the conveyor elevator is in its unfolded working position the conveyor portions extend substantially rectilinearly as a rigid assembly and in an upwardly sloping direction from the mounting of the tail portion on the chassis.
Thus, by simple operation of the actuator, the conveyor portions can be readily caused to move between the folded position when the conveyor elevator is inoperative and is ready for transportation to another working position or site, and its unfolded working position in which it slopes upwardly as a rigid assembly which is able to elevate bulk material supplied to the tail portion to a discharge outlet at the upper end of the
REFERENCES:
patent: 326801 (1885-09-01), Sprague
patent: 2141482 (1938-12-01), McCraw
patent: 2632556 (1953-03-01), Alpers et al.
patent: 3051295 (1962-08-01), Moy
patent: 3841464 (1974-10-01), Tome
Extec Screens & Crushers Limited
Gastineau Cheryl L.
Olszewski Robert P.
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