Invention Grant
- Patent Title: Forklift and fork control method
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Application No.: US16465182Application Date: 2016-12-19
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Publication No.: US10752480B2Publication Date: 2020-08-25
- Inventor: Harukazu Kimura
- Applicant: Mitsubishi Logisnext Co., Ltd.
- Applicant Address: JP Kyoto
- Assignee: MITSUBISHI LOGISNEXT CO., LTD.
- Current Assignee: MITSUBISHI LOGISNEXT CO., LTD.
- Current Assignee Address: JP Kyoto
- Agency: Kirschstein, Israel, Schiffmiller & Pieroni, P.C.
- International Application: PCT/JP2016/087727 WO 20161219
- International Announcement: WO2018/116336 WO 20180628
- Main IPC: B66F9/07
- IPC: B66F9/07 ; B66F9/22 ; B66F9/075 ; F15B11/048 ; F15B13/04

Abstract:
A forklift includes forks, cylinders for causing the forks to perform an ascending/descending operation in accordance with the flow rate of hydraulic oil, a first valve for controlling the flow rate of the hydraulic oil in accordance with an energizing current, a second valve 6 for regulating the flow rate of the hydraulic oil in accordance with cylinder pressure, and a control portion that calculates the flow rate to be regulated by the second valve, on the basis of cylinder pressure detected by a pressure sensor, calculates a current command value for the energizing current, with the flow rate to be controlled by the first valve being set equal to the regulated flow rate, and changes the energizing current in two stages, with the current command value as the upper limit of the energizing current, thereby decelerating the forks in two stages when stopping the ascending/descending operation.
Public/Granted literature
- US20200002144A1 Forklift and Fork Control Method Public/Granted day:2020-01-02
Information query
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