Weighing scales – With weigher loading or unloading means
Patent
1995-08-10
1998-08-18
Gellner, Michael L.
Weighing scales
With weigher loading or unloading means
177119, 177121, 177122, 177120, 1985022, 198812, 198594, G01G 1302, G01G 1900, B65G 4300, B65G 1526
Patent
active
057960526
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an apparatus as generically defined by the preamble to claim 1 and to a method for conveying and measuring articles.
In the industry, conveyors for articles are known that include a telescoping conveyor, a separating conveyor, a weighing device with a volume measuring frame, and a shunt, also known as a router table. The telescoping conveyor has a basic body supported at an adjustable height in a corresponding retainer device, and two extensible telescoping segments are displaceably supported in the basic body. The basic body and the telescoping segments are provided with deflection rollers, around which a conveyor belt is guided. The conveyor belt is also guided around a drive roller, which is located in the basic body and is driven by an electric motor. The conveyor belt is driven in such a way that its upper run extends from the outer end of one telescoping segment to the basic body. The extended telescoping segment thus forms a place where articles can be deposited.
To separate the articles of bulk goods traveling on the conveyor belt and to extend the conveying path, a separating conveyor is set up on the side of the basic body opposite the telescoping segments. The separating conveyor has a basic frame in which a plurality of axially parallel rollers are rotatably supported, at least one of them being driven via an electric motor. A conveyor belt whose upper run follows on the trailing end of the telescoping conveyor essentially without any offset is wrapped tightly about the rollers. The conveyor belt of the separating conveyor runs at a markedly higher speed than the conveyor belt of the telescoping conveyor; thus the articles are taken on separately, or in other words individually. A weighing device that also has a driven conveyor belt guided over rollers is set up following the separating conveyor. The rollers that guide the conveyor belt are supported, along with the associated drive mechanism, on an auxiliary frame that is seated, via a weighing cell, on a supporting frame. Further measuring devices are located in the weighing device, one of them being the aforementioned volume measuring frame. This frame, through which the articles must pass, has a number of photoelectric barriers, for both the vertical and the horizontal direction. They form an electronic curtain for determining the volume of the articles passed through the volume measuring frame. There is also a scanner, which reads the bar code on the articles and sends them to a control unit.
The shunt for the articles is set up immediately following the weighing device. It has an approximately trapezoidal roller table, mounted on a corresponding frame, whose conveying plane, defined by the rollers, is located at the same height as the upper run of the weighing device. On the output side, the shunt for the articles is connected for a plurality of further conveyors, which take on the articles from the shunt. To switch the conveying path from the weighing device to one of the conveyor devices leading away from the shunt, the shunt has two guide baffles that are pivotable about vertical axes spaced apart from and parallel to one another. For pivoting these guide baffles, a drive mechanism is provided, which is controlled by the aforementioned processing unit.
The conveyor described thus far requires considerable floor space to be set up on. The basic body of the telescoping conveyor alone has a length of about five meters. Added to this are the lengths of the separating conveyor and the weighing device, which together make up more than three meters, and the space needed for the shunt for the articles. The required space of over eight meters in length is generally unavailable, especially in the kinds of goods handling tasks where the system described is used.
With this as its point of departure, it is an object of the invention to create a conveyor for articles that occupies markedly less space, and in which the articles conveyed are automatically weighed and if need be also measured. It is also an object of the invent
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Caljan A/S
Gellner Michael L.
Mai Anh
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