Weighing scales – Computer – Electrical
Patent
1996-04-16
1998-06-16
Gellner, Michael L.
Weighing scales
Computer
Electrical
177103, 177108, 177114, 222 56, 222 58, G01G 1300, B67D 508
Patent
active
057674531
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a combined metering apparatus for metering a plurality of target metering objects supplied from a work table or the like and having varied weights, combining the target metering objects in unit target weights, and discharging the combined target metering objects and, more particularly, to a combined metering apparatus for separately measuring the weights of a plurality of target metering objects separately introduced into a plurality of metering containers by using a plurality of metering means, in particular load cells, combining the plurality of target metering objects supplied from the plurality of metering containers to have a predetermined weight after the measurement, and discharging the combined target metering objects.
BACKGROUND ART
A combined metering apparatus is conventionally used to efficiently discharge food and the like having varied weights in the form of a batch having a target weight.
Generally, in the combined metering apparatus of this type, target metering objects, e.g., food, are supplied from a plurality of pool hoppers to a plurality of metering hoppers arranged below the pool hoppers, and are metered. The combination of the target metering objects having a weight close or equal to the target weight is selected based on the metering results of the respective metering hoppers. The target metering objects selected to constitute this combination are discharged from the respective metering hoppers and are collected together.
As a method of measuring the weight of a target metering object, one is available which converts the deformation of an elastic body into a change in electric resistance. A load detector based on this principle is generally called a load cell, and is sometimes called a strain gauge type load cell.
Particularly, a load cell 200 shown in FIG. 36 is called a load beam or dual beam type load cell. This load cell 200 is suitable for measuring a small weight and has good dynamic characteristics with a simple, compact structure.
In this load cell 200, four strain gauges 202c are mounted to an elastic body (magnetostrictive body) 202d to which a load is applied. The strain gauges 202c constitute a Wheatstone bridge circuit. A mount side 202a of the elastic body 202d is fixed to the base body and a load is applied to a load side 202b. An output resulted from a change in resistance proportional to the load is detected.
As a metering apparatus utilizing a load cell, one as shown in FIG. 37 is available which is disclosed in Jpn. Pat. Appln. KOKAI Publication No. 3-123233 to the same applicant as that of this application. In this metering apparatus, the mount side of a load cell 231 is fixed to a base body 232, and one base plate 233 is mounted on the load side of the load cell 231.
A metering hopper 234 for storing and metering a target metering object, and a drive portion 236 for opening/closing a discharge door 235, through which the target metering object is stored in and discharged from the metering hopper 234, are attached to the base plate 233.
When metering a target metering object, the discharge door 235 of the metering hopper 234 is closed, and the target metering object is introduced into the metering hopper 234. When metering is ended, the discharge door 235 is opened, and the target metering object is discharged from the metering hopper 234.
Similarly, as a metering apparatus utilizing a load cell, one shown in FIG. 38 is available which is disclosed in Jpn. Pat. Appln. KOKAI Publication No. 4-363630 to the same applicant as that of this application.
In this metering apparatus, the mount side of a load cell 237 is fixed to a base body 238, and a cylindrical member 239 is mounted on the load side of the load cell 237 in place of a metering hopper having a discharge door as described above.
An opening/closing member 240 for storing and discharging the target metering object is provided under the cylindrical member 239. The opening/closing member 240 is moved in the horizontal direction by a moving mechanism 243 con
REFERENCES:
patent: 4393950 (1983-07-01), Klopfenstein et al.
patent: 4614243 (1986-09-01), Ikeda
patent: 5340949 (1994-08-01), Fujimura et al.
Kobayashi Sadao
Tsukasa Fumihiro
Wakou Kazuyoshi
Anritsu Corporation
Gellner Michael L.
Gibson Randy W.
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