Weighing scales – Computer
Patent
1994-12-23
1998-02-03
Gellner, Michael L.
Weighing scales
Computer
177141, G01G 1922, G01G 1910
Patent
active
057147191
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a workload detecting system for an excavating and loading apparatus having a bucket, such as a power shovel, wheel loader and so forth.
BACKGROUND ART
Excavation and transportation work in a civil engineering site, is generally done by loading earth and sand into a dump truck by means of an excavating and loading apparatus and to transport the loaded earth and sand by the dump truck. While it depends on the transporting distance by the dump truck, such excavating and transporting operations are typically done by a combination of five to six dump trucks and one excavating and loading apparatus so that the excavating and loading apparatus may continuously perform excavating and loading operation without resting.
On the other hand, when excavating and transporting portions of earth and sand, it is important for the management of an operation to know the amount of earth and sand transported per day. Therefore, in the conventional earth and sand transporting amount calculating system, a loading amount measuring device is installed on each dump truck, to detect a load amount and a daily earth and sand transporting amount is calculated by summing the loading amount.
Therefore, in the conventional earth and sand transporting amount calculating system, a large number of loading amount measuring devices corresponding to the number of the dump trucks becomes necessary and causes high cost.
Therefore, it is an object of the present invention to provide a workload detecting system for an excavating and loading apparatus which can detect the workload of the excavating and loading apparatus. The workload detecting system permits calculation of a daily earth and sand transporting amount without providing load amount measuring devices for each dump truck and as such provides the earth and sand transporting amount calculating system at low cost.
DISCLOSURE OF THE INVENTION
In order to accomplish the above-mentioned and other objects, in accordance with the present invention, a workload detecting system for an excavating and loading apparatus is disclosed. The excavating and loading apparatus includes a bucket supporting assembly which is vertically pivoted relative to a vehicle body and a bucket is actuated to be tilted with respect to the bucket supporting assembly. The apparatus includes a cylinder which vertically pivots the bucket supporting assembly.
A bucket earth and sand amount calculating means for calculating an earth and sand weight within the bucket on the basis of the detected bottom pressure is also included.
Also provided is a bucket earth and sand amount calculating summing means for integrating the calculated bucket earth and sand weight.
With the construction set forth above, the bucket earth and sand weight per operation by the bucket of the excavating and loading apparatus and sum of bucket earth and sand weight in a day can be detected. Therefore, when excavation and transportation of earth and sand is performed by a combination of one excavating and loading apparatus and a plurality of dump trucks, the transported earth and sand weight in a day can be detected without providing expensive load amount measuring devices for respective dump trucks. Accordingly, the earth and sand transporting amount calculating system can be constructed at low cost.
It should be noted that, in the construction set forth above, it is preferred that the workload detecting system for an excavating and loading apparatus also includes a dump actuation detecting means.
The dump actuation detecting means detects actuation of a dump of the bucket. The bucket earth and sand amount calculating means calculates the bucket earth and sand weight from an average value of the bottom pressure detected at timings slightly before and after a predetermined period from a given timing which is set at a given period ahead of input timing of a dump actuation detection signal.
With the construction set forth above, since the bucket earth and sand weight is derived from the average val
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Imanishi Kunihiko
Kimoto Kenzo
Otsuka Kazuo
Shoda Minpei
Gellner Michael L.
Gibson Randy W.
Kabushiki Kaisha Komatsu Seisakusho
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