Material or article handling – Device for emptying portable receptacle – For emptying contents thereof into portable receiving means
Patent
1990-05-08
1991-11-12
Werner, Frank E.
Material or article handling
Device for emptying portable receptacle
For emptying contents thereof into portable receiving means
414 21, 414409, 414421, B65F 304
Patent
active
050643339
DESCRIPTION:
BRIEF SUMMARY
1. FIELD OF THE INVENTION
The invention relates to an apparatus for emptying containers, particularly refuse containers, with at least one lifting and tipping apparatus which is provided with a lifting and tipping frame to receive the container to be emptied, with a pressure medium power circuit to actuate the lifting and tipping frame, with an electrical control device to active the pressure medium power circuit, with an actuating device for activating the electrical control device, and with a switch device for affecting the lifting and tipping motion of the lifting and tipping frame, wherein the switch device can be actuated by the container received on the lifting and tipping frame and is operative on the further lifting and tipping motion in such a way that the lifting and tipping motion is contained only i a container on the lifting and tipping frame is in predeterminable alignment.
2. BRIEF DESCRIPTION OF THE PRIOR ART
An apparatus of this kind is known from DE-A 3 517 491. This apparatus has a switching ledge, which can be pressed down by a container seated on the lifting and tipping apparatus and can thereby actuate a limit switch. After a certain lifting time, or after overcoming a certain lifting height, the switch initiates an automatically proceeding lifting and tipping process for a refuse container to be emptied. The limit switch is, in this case, only activated if the switching ledge is pressed down by the container edge. The switching ledge is moveable about an axis which is aligned parallel to the container edge seated on the lifting and tipping apparatus. The ledge is, thus, always pressed down, and, thus, the limit switch actuated, whenever any part of this container edge rests on the ledge from above. This entails the risk that even with "incorrect" seating of the container, as, for example, in the case of a laterally offcenter seating or partially damaged bead edge, or with the presence of dirt particles in the bead edge, a "correct" seating is simulated.
Furthermore, an apparatus is known (WO 85/13689), which is provided with an electrical control circuit which contains a switch actuated by a container placed on the lifting and tipping apparatus to switch on the control process, and a time switch determining the timed valve control for the course of the motion. The lifting and tipping apparatus is, thus, automatically started by the container placed on the lifting and tipping apparatus. As long as the refuse container is not correctly present on the lifting and tipping apparatus by the switch starting the lifting and tripping apparatus, the apparatus cannot be set in motion. The electrical control circuit provided for timed valve control can be further developed in this known apparatus, such that upon release of the container set on the lifting and tipping apparatus by the switch starting the lifting and tipping apparatus, the lifting and tipping apparatus is reset to its initial position. It is thereby ensured that the lifting and tipping motion is not continued if the container has lost its contact seating on the switch. The switch also serves the purpose in this development of automatically setting the emptying process in motion. The emptying process is, of course, interrupted as soon as the refuse container no longer abuts the switch. The probability of a correctly placed container losing its seating during the emptying process is quite small and is, for example, only imaginable in the case where load-bearing constructional elements break. If something of the kind should happen, this known emergency circuit which interrupts the lifting and tipping process would, of course, be of little help. The container would fall back uncontrollably, independently of the return travel of the lifting and tipping frame, in such an accident.
In the known apparatus, the emptying process can only be started, in any case, when the container has assumed its prescribed seating on the lifting and tipping apparatus, since only in this position can it contact the switch present on the lifting and tipp
REFERENCES:
patent: 4057156 (1977-11-01), Thompson et al.
patent: 4722656 (1988-02-01), Naab
patent: 4722658 (1988-02-01), Wurtz et al.
patent: 4771837 (1988-09-01), Appleton et al.
Otto Lift-Systeme GmbH
Werner Frank E.
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