Conveyors: power-driven – Conveyor section – Endless conveyor
Patent
1986-10-14
1988-04-19
Paperner, L. J.
Conveyors: power-driven
Conveyor section
Endless conveyor
198840, 198842, 198836, 1988611, B65G 1510
Patent
active
047383534
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to means in belt conveyors, primarily intended to achieve synchronization of the belt.
The invention is preferably intended for use in light conveyors having two belts running in parallel. Such a conveyor has such low weight that it can be moved and erected in working position by one or at most two men.
BRIEF DESCRIPTION OF THE DRAWINGS
Such a patented conveyor will be described with reference to the accompanying drawings in which:
FIG. 1 shows a conveyor according to the invention seen from the side,
FIG. 2 shows the conveyor seen from above and
FIG. 3 shows an axial view of a connection according to FIG. 2.
FIG. 4 shows the arrangement of the belt,
FIG. 5 gives a more complete picture of the belt and support cables;
FIG. 6 shows the system with support rollers,
FIG. 7 shows a detail of a critically positioned support roller and
FIG. 8 shows a detail of a support roller located on top of the belt at the crossing.
FIG. 1 shows the conveyor from the side. For the sake of clarity the figure has been cut and contracted. The figure thus falls into three divisions: the ends 1 and 3 and the middle part 2. Various components have been denoted by A, B, C and so on. The conveyor is constructed around the central body I, consisting of the three parts which can be telescoped into each other to facilitate transport from one site to another. When extended, the three parts are locked in relation to each other with the aid of pins or bolts 2B.
As can also be seen from FIG. 2, two parallel belts 1E run over guide rollers 1F and 3L at the ends of the conveyor. To enable driving of the belts, the guide roller 1F, which is not driven, is arranged on a bracket 1G located on a pipe 1B protruding into the body I. With the aid of a screw 1D running in a nut 1C in the body, the bracket 1G can be moved in one direction or the other. Other brackets 2C with support rollers 2A for the upper sections of the belts are provided at suitable intervals along the body. A number of feeders 3H are also provided on the belts 1E to feed the load units along. These feeders may be in the form of very simple rubber studs or the like. The belts may consist of strong, relatively narrow strips or nylon, for instance, some five to ten cemtimeters in width.
The belts are driven by guide rollers 3L at the righthand end of FIG. 1. These guide rollers are in turn driven by a motor 3G with suitable ratio. The guide rollers are located on the driving shaft 3K from the motor but can rotate quite freely thanks to ball-bearings 3M. They are driven individually by one of the jaws 3B in a jaw clutch, the other part of which is in a cylindrical sleeve 3a on the guide roller 3L. The principle can be seen more clearly in FIG. 3 showing an axial view of the connection.
As is evident from FIGS. 2 and 3, the sleeve 3A is divided into a number of teeth between which the jaws 3B can engage. The jaws are located on a transverse arm secured to the driving shaft 3K. The jaws 3B are also located in relation to each other and to the pitch of the teeth in the sleeve 3A so that only one jaw can engaged between these teeth at a time. A spring 3J between the jaws presses these apart from each other and in between the teeth.
The jaw clutches are controlled by a double-acting electromagnet 3C whose armature on the ends is provided with circular discs 3D. When the armature is driven in one direction or the other, one of these discs will influence keepers on the jaws 3B which are thus forced out of engagement with the teeth on the sleeve 3A. The magnet 3C is controlled by indicators 3E on the belts 1E. These indicators may consist of small permanent magnets fitted equidistant from feeders 3H on the belts. It is thus possible to determine whether the feeders on the two belts remain immediately opposite each other.
Obviously this can never be the case since it is impossible to manufacture the guide rollers 3L so exactly alike that the two belts always move exactly synchronously. However, by momentarily releasing one or the other of the jaw clutches 3A,
REFERENCES:
patent: 2573486 (1951-10-01), Pollitz
patent: 2698079 (1954-12-01), Wearly
patent: 2705854 (1955-04-01), Laverdisse
patent: 3225902 (1965-12-01), Roinestad
patent: 3598226 (1971-08-01), Hayman
patent: 4013165 (1977-03-01), Bush
patent: 4274529 (1981-06-01), Mori et al.
patent: 4366900 (1983-01-01), Johansson
Dayoan D. Glenn
Paperner L. J.
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