Conveyors: power-driven – Conveyor arrangement for selecting among plural sources or... – By passive material-diverting means placed across the flow path
Patent
1992-03-02
1993-03-02
Valenza, Joseph E.
Conveyors: power-driven
Conveyor arrangement for selecting among plural sources or...
By passive material-diverting means placed across the flow path
1984771, 198715, B65G 4746
Patent
active
051901358
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a tray of the type stated in the introductory portion of claim 1.
The Danish Patent Specification 155 207 discloses a sorting machine containing a plurality of trays, which are moved in an endless path and can be pivoted about a pivot axis by a selectively controllable activation means for emptying the contents of the tray on a desired unloading means.
EP-A1-022602 discloses a tray which together with a plurality of similar trays is suspended from a conveyor. These trays are used for transporting lumps of dough. To avoid sticking of the dough lumps to the substrate, which is a cloth passed around some smooth rods, one of these rods is provided with an anti-slip material on the surface and is rotated evenly during transport, such that the cloth, on which the dough rests, is constantly displaced and such that the dough rolls in a sagging part of the cloth.
The object of the invention is to provide an improved tray which may be used e.g. in the mentioned known sorting machine.
This object is achieved according to the invention in that the tray stated in the opening paragraph is characterized by the features defined in the characterizing portion of claim 1.
Loading of the tray with parcels takes place in that the parcels fall down on the tray. The parcels then hit the fabric-covered frame which mitigates the drop so that the parcels are protected against damage, and the sorting machine operates with less noice than with the previously used trays.
When at least one of the two-armed levers of the tray is activated by an activation means, known per se, in the sorting machine, the pivoted suspension of the fabric-covered frame causes the frame to pivot from the horizontal position of equilibrium to an inclined discharge position in the support, in which it is pivotally suspended in the two-armed levers.
The support consists of the U-shaped rods on which discharge means are secured, and which, in the inclined discharge position of the frame, engage and stretch the fabric on the frame so that the parcels are almost thrown off or slide easily down from the tray.
The invention will be explained more fully below with reference to the drawing, in which
FIG. 1 schematically shows one end of a sorting machine known from the Danish Patent 155 207, in which the tray known from said patent has been replaced by the tray of the invention,
FIG. 2 is a perspective view of the tray of the invention in a horizontal position of equilibrium,
FIG. 3 is a lateral view of the tray from FIG. 1 and shows in broken lines the same tray which has been pivoted from the horizontal position of equilibrium to an inclined discharge position, and
FIG. 4 shows the right side of the tray in FIG. 3 from the end.
The sorting machine shown in FIG. 1 contains a plurality of trays which are generally designated 1 and shown in more detail in FIG. 2. These trays are pivotally suspended at both sides in pivots 2, 3 in the center of their respective two-armed levers 4 and 5, respectively. The pivots 2, 3 are secured to their respective ones between two chains 7 and 8 driven in synchronism and by the same drive motor (not shown), said chains being shown in broken lines in FIG. 1. The chains 6 and 7 preferably consist of steel wires 8, 9, which are placed around a chain wheel at each end of the sorting machine.
Since only one end of the sorting machine is shown in the drawing, only one pair of chain wheels 10 and 11 is visible for each steel wire 8 and 9, respectively.
Below the trays in both the upper and the lower run of the path, a plurality of stationary chutes 12 is placed at even intervals in a machine frame (not shown), in which a corresponding number of levers 14 is secured, said levers being pivotable about a horizontal shaft 13.
The levers 14 can be caused to assume an activated state by means of their respective pneumatic cylinders 15, during which the associated lever 14 is caused to engage a projection in the form of a wheel 16 on the two-armed lever 4 or 5 of a tray 1. Consequently, the tray 1 in question is pivoted from t
REFERENCES:
patent: 2017046 (1935-10-01), Hanna et al.
patent: 4565277 (1986-01-01), Benier
patent: 4805780 (1989-02-01), Solund
ITS-Intern Transport Systems A/S
Valenza Joseph E.
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