Conveyors: power-driven – Conveyor section – Endless conveyor
Patent
1982-08-27
1985-01-29
Valenza, Joseph E.
Conveyors: power-driven
Conveyor section
Endless conveyor
B65G 1508
Patent
active
044960433
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The present invention relates to improvements in conveyor systems and especially to improvements in the manner of mounting idler roller assemblies in such systems.
Despite all efforts to prevent ingress of water, dirt and dust into the bearings on which idler rollers are mounted for rotation such substances, nevertheless, gain entry and frequently cause bearing failure. Such failure may result in overheating of the bearing affected to the extent that a fire is caused, an especially serious hazard when the conveyor is being used underground, for example in a coal mine.
Bearing failure generally requires that the conveyor line be halted until the affected idler roller assembly has been replaced.
We have now developed a means of mounting at least one of the two outer idler rollers in an idler roller assembly in such a manner that in the event of bearing failure, or iminent failure, the affected roller can be quickly and easily removed to a position out of contact with the conveyor belt, thereby preventing further wear on the bearing and making the rollers easily available for replacement without the need to halt the conveyor line.
Accordingly, therefore, the present invention provides an idler roller assembly in a conveyor system consisting of at least two rollers in a V or trough formation mounted in the conveyor frame, on shafts extending outwardly from the outer rollers thereof, for movement between an operative position in which the rollers support the conveyor belt and an inoperative position in which the said rollers no longer support the conveyor belt, wherein at least one of the said shafts is supported in the conveyor frame by support means including means for moving the said idler roller assembly between the operative and inoperative positions.
The said second means preferably includes a member mounted at one end of the said shaft for rotation about an eccentric axis, which member co-operates with the said frame and/or support means such that in a first position the assembly is maintained in the operative position and in a second position the assembly is in the inoperative position, the said member including a third means, such as a handle, for effecting movement between the said first and second positions.
The said member may be a disc pivotally mounted offcentre and in a plane substantially parallel to the axis of the said shaft, preferably having a flat portion at right angles to the diameter on which the mounting is located. The disc may, of course, have a plurality of flat portions, for example it may be hexagon shaped.
The supporting means for the shaft may include elements adjacent the said frame providing a channel in which the shaft is located to position the assembly relative to the conveyor line, and within the said shaft is free to move.
One embodiment of the invention will now be more fully described with reference to the accompanying diagrammatic drawings in which:
FIG. 1 is an illustration of the end of one shaft supporting an outer roller of an idler roller assembly when the said assembly is in the operative position,
FIG. 2 is a part section along line A--A of FIG. 1,
FIG. 3 is a representation of a part section through the conveyor with the idler assembly in the operative position,
FIG. 4 is an illustration of the end of one shaft supporting an outer roller with the idler roller assembly in the inoperative position,
FIG. 5 is a representation of a part section through a conveyor with the idler roller assembly in the inoperative position.
Referring to the drawings. An idler roller assembly shown in part section in FIGS. 3 and 5 includes two outer rollers 1 (one only shown) and a centre roller 2. One end of roller 2 is supported on a shaft 3 by a roller bearing (not shown) located within the roller. The inner end of the roller 1 is likewise supported on a shaft 4 by a roller bearing (not shown) located within the roller. Shafts 2 and 4 are coupled through a bolt arrangement 5 about which both shafts are free to pivot.
The opposite end of roller 2 is similarly supported a
REFERENCES:
patent: 1530499 (1925-03-01), Knode
patent: 4043447 (1977-08-01), Donnelly et al.
patent: 4134488 (1979-01-01), Bigney
Brockway Engineering Company Limited
Valenza Joseph E.
Williamson Dennis
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