To enable accurate identification of the center of gravity of a lift device without installing a measurement device for suspension pressure measurement of a hydraulic cylinder.SOLUTION: The lift device comprises: first and second lifts that convert rotational motions of motors into linear motions to lift a lifting plate; and a lift device drive unit that drives both the motors of the first and second lifts. The lift drive unit (150) includes: a power source (151); a motor driver (153) that is a first motor driver for driving the motor of the first lift by power from the power source; a motor driver (153) that is a second motor driver for driving the motor of the second lift by power from the power source; and a control unit (160). The control unit (160) includes a gravity center estimation unit (161) that estimates the gravity center position of a target workpiece on the lifting plate on the basis of a difference between a current value from the power source to the first motor driver and a current value from the power source to the second motor driver.SELECTED DRAWING: Figure 4

    【課題】油圧シリンダのサスペンション圧力計測用の計測装置を設けずに、リフト装置の重心の正確な特定を可能とする。【解決手段】モータの回転運動を直線運動に変換して昇降板を昇降させる第1リフト部及び第2リフト部と、第1リフト部及び第2リフト部のモータの双方を駆動するリフト装置駆動部と、を備えるリフト装置とする。リフト装置駆動部(150)は、電源部(151)と、電源部からの電力で第1リフト部のモータを駆動する第1モータドライバであるモータドライバ(153)と、電源部からの電力で第2リフト部のモータを駆動する第2モータドライバであるモータドライバ(153)と、制御部(160)と、を備える。制御部(160)は、電源部から第1モータドライバへの電流値と電源部から第2モータドライバへの電流値との差に基づいて、昇降板上の対象ワークの重心位置を推定する重心推定部(161)を含む。【選択図】図4


    Access

    Download


    Export, share and cite



    Title :

    LIFT DEVICE AND UNMANNED CARRIER


    Additional title:

    リフト装置及び無人搬送車


    Contributors:

    Publication date :

    2021-12-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60P Fahrzeuge zum Transport von Lasten oder zum Befördern, Tragen oder Aufnehmen besonderer Lasten oder Gegenstände , VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last



    LOW LIFT TYPE UNMANNED CARRIER

    YAMADA SADAO / MASUYAMA SHINYA | European Patent Office | 2019

    Free access

    LIFT DEVICE AND CARRIER DEVICE WITH LIFT DEVICE

    FUKUZOE KAZUNORI | European Patent Office | 2018

    Free access

    UNMANNED FORK LIFT

    YOSHIMOTO HIROAKI | European Patent Office | 2018

    Free access

    LIFT CARRIER

    KITAJIMA TOSHIKI / WATANABE NORINAO / NAKAMURA YUTAKA et al. | European Patent Office | 2023

    Free access

    LIFT CARRIER

    JO JAE JIN | European Patent Office | 2017

    Free access