Method for clocking cumulative operating time for a cargo-handling vehicle, and the cargo-handling vehicle by use of the method
First Claim
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1. A method for clocking cumulative operating time for a cargo-handling vehicle provided with a plurality of functional units, the functional units comprising at least a first functional unit and a second functional unit,the first functional unit comprising the first clocking device for clocking the cumulative operating time of the vehicle, the first memory device for storing the cumulative operating time clocked by the first clocking device and, the communication port for communicating with the outside of the first functional unit,the second functional unit comprising the second clocking device for clocking the cumulative operating time of the vehicle, the second memory device for storing the cumulative operating time clocked by the second clocking device, and the communication port for communicating with the outside of the second functional unit;
- whereby,the first clocking device and the second clocking device clock the cumulative operating time of the vehicle independently of each other so as to configure a duplex system for clocking the cumulative operating time of the vehicle;
each of the first and second memory devices storing the cumulative operating time clocked by corresponding clocking device;
the cumulative operating time stored in the first memory device is transmitted toward the second memory device through a communication port in the first functional unit and a communication port in the second functional unit at the time points of predetermined time intervals periodically, whereas the cumulative operating time stored in the second memory device is transmitted toward the first memory device through the communication port in the first functional unit and a communication port in the second functional unit at the time points of predetermined time intervals;
the difference between the cumulative time stored in the first functional unit and the cumulative time stored in the second functional unit is computed in each of the first and second functional units, so that it is grasped whether or not the cumulative operating time stored in one side functional unit is greater than or equal to the cumulative operating time stored in the other side functional unit;
the cumulative operating time stored in the memory device in one side functional unit is renewed with the cumulative operating time stored in the memory device in the other side functional unit in a case where the cumulative operating time stored in the memory device in the one side functional unit is smaller than the cumulative operating time stored in the memory device in the other side functional unit, whereas the cumulative operating time stored in the memory device in one side functional unit is conserved on an as-is basis in a case where the cumulative operating time stored in the memory device in the one side functional unit is greater than or equal to the cumulative operating time stored in the memory device in the other side functional unit.
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Abstract
The use time till a display unit including an hour meter (a time measuring device) is replaced can be continued even if the time measuring device fails, and false alteration after shipping can be prevented while infallibly resetting the hour meter to zero when the vehicle equipped with the hour meter is shipped from the factory. The cargo handling vehicle includes a first storage device for accumulatively storing the vehicle use time measured by a first time measuring device provided in a display unit of the vehicle and a second storage device for accumulatively storing the vehicle use time measured by a second time measuring device provided in a control device. The control device allows the first and second storage devices to communicate the accumulated use times stored therein when the electric power of the vehicle is turned on. The control device compares the accumulated use times and writes the longer accumulated use time in the storage device storing the shorter one.
1 Citation
19 Claims
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1. A method for clocking cumulative operating time for a cargo-handling vehicle provided with a plurality of functional units, the functional units comprising at least a first functional unit and a second functional unit,
the first functional unit comprising the first clocking device for clocking the cumulative operating time of the vehicle, the first memory device for storing the cumulative operating time clocked by the first clocking device and, the communication port for communicating with the outside of the first functional unit, the second functional unit comprising the second clocking device for clocking the cumulative operating time of the vehicle, the second memory device for storing the cumulative operating time clocked by the second clocking device, and the communication port for communicating with the outside of the second functional unit; - whereby,
the first clocking device and the second clocking device clock the cumulative operating time of the vehicle independently of each other so as to configure a duplex system for clocking the cumulative operating time of the vehicle;
each of the first and second memory devices storing the cumulative operating time clocked by corresponding clocking device;the cumulative operating time stored in the first memory device is transmitted toward the second memory device through a communication port in the first functional unit and a communication port in the second functional unit at the time points of predetermined time intervals periodically, whereas the cumulative operating time stored in the second memory device is transmitted toward the first memory device through the communication port in the first functional unit and a communication port in the second functional unit at the time points of predetermined time intervals; the difference between the cumulative time stored in the first functional unit and the cumulative time stored in the second functional unit is computed in each of the first and second functional units, so that it is grasped whether or not the cumulative operating time stored in one side functional unit is greater than or equal to the cumulative operating time stored in the other side functional unit; the cumulative operating time stored in the memory device in one side functional unit is renewed with the cumulative operating time stored in the memory device in the other side functional unit in a case where the cumulative operating time stored in the memory device in the one side functional unit is smaller than the cumulative operating time stored in the memory device in the other side functional unit, whereas the cumulative operating time stored in the memory device in one side functional unit is conserved on an as-is basis in a case where the cumulative operating time stored in the memory device in the one side functional unit is greater than or equal to the cumulative operating time stored in the memory device in the other side functional unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- whereby,
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9. A cargo-handling vehicle provided with a plurality of functional units including a first functional unit and a second functional unit, the vehicle having at leas one clocking device and at least one memory device for storing the cumulative operation time of the vehicle clocked by the clocking device,
the first functional unit comprising the first clocking device for clocking the cumulative operating time of the vehicle, the first memory device for storing the cumulative operating time clocked by the first clocking device, and the communication port for communicating with the outside of the first functional unit, the second functional unit comprising the second clocking device for clocking the cumulative operating time of the vehicle, the second memory device for storing the cumulative operating time clocked by the second clocking device, and the communication port for communicating with the outside of the second functional unit; - whereby, the functional units are controlled so that
the first clocking device and the second clocking device clock the cumulative operating time of the vehicle independently of each other so as to configure a duplex system for clocking the cumulative operating time of the vehicle;
each of the first and second memory devices storing the cumulative operating time clocked by corresponding clocking device;the cumulative operating time stored in the first memory device is transmitted toward the second memory device through a communication port in the first functional unit and a communication port in the second functional unit at the time points of predetermined time intervals, whereas the cumulative operating time stored in the second memory device is transmitted toward the first memory device through the communication port in the first functional unit and a communication port in the second functional unit at the time points of predetermined time intervals; the cumulative time stored in the first functional unit and the cumulative time stored in the second functional unit are compared with each other in each of the first and second functional units, so that it is grasped whether or not the cumulative operating time stored in one side functional unit is greater than or equal to the cumulative operating time stored in the other side functional unit; the cumulative operating time stored in the memory device in one side functional unit is renewed with the cumulative operating time stored in the memory device in the other side functional unit in a case where the cumulative operating time stored in the memory device in the one side functional unit is smaller than the cumulative operating time stored in the memory device in the other side functional unit, whereas the cumulative operating time stored in the memory device in one side functional unit is conserved on an as-is basis in a case where the cumulative operating time stored in the memory device in the one side functional unit is greater than or equal to the cumulative operating time stored in the memory device in the other side functional unit. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- whereby, the functional units are controlled so that
Specification
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Current AssigneeMitsubishi Nichiyu Forklift Co., Ltd. (Mitsubishi Heavy Industries, Ltd.)
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Original AssigneeMitsubishi Heavy Industries, Ltd.
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InventorsIshikawa, Naoki, Kurihara, Tsutomu
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Primary Examiner(s)Raymond, Edward
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Application NumberUS12/746,057Publication NumberTime in Patent Office1,323 DaysField of Search702/79, 702182-185US Class Current702/79CPC Class CodesB66F 9/24 Electrical devices or systemsG07C 5/085 using electronic data carriers
