PROBLEM TO BE SOLVED: To provide a load receiving platform lifting device of which an operation speed can be reduced at the end of a contraction operation of a tilt cylinder.SOLUTION: A hydraulically driven tilt cylinder 3 for adjusting an angle of a load receiving platform comprises: a cylindrical cylinder tube 31; a piston 32 which is reciprocated in the cylinder tube 31; a piston rod 33 which is connected to the piston 32; a valve part 35 which is so provided as to be movable in an axial direction of the piston rod 33 on a tip side with respect to the piston 32; and an energization part 36 which energizes the valve part 35 in a tip direction of the tilt cylinder 3. The cylinder tube 31 comprises a downstream side oil passage 311 on a tip side with respect to a movable range of the piston 32, the valve part 35 has a cross-sectional area larger than a cross-sectional area of an actual oil passage portion of the downstream side oil path 311, and covers the downstream side oil passage 311 in the state that passage of hydraulic oil is permitted with a reduced oil quantity, before the piston 32 reaches a tip of the movable range.SELECTED DRAWING: Figure 4

    【課題】チルトシリンダの収縮動作収縮動作の終期において動作速度を低下させることのできる荷受台昇降装置を提供する。【解決手段】荷受台の角度を調整する油圧駆動のチルトシリンダ3が、筒状のシリンダチューブ31と、前記シリンダチューブ31内を往復動するピストン32と、前記ピストン32に連結されるピストンロッド33と、前記ピストン32よりも先端側に前記ピストンロッド33の軸方向に移動可能に設けられたバルブ部35と、前記バルブ部35を前記チルトシリンダ3の先端方向に付勢する付勢部36とを備え、前記シリンダチューブ31は、前記ピストン32の可動範囲よりも先端側に下流側油路311を備え、前記バルブ部35は、前記下流側油路311のうちで実際の通油部分の断面積よりも大きい断面積を有し、前記ピストン32が可動範囲の先端に至るより前に、前記下流側油路311を作動油の通過を減少した油量で許容した状態で覆う。【選択図】図4


    Access

    Download


    Export, share and cite



    Title :

    LOAD RECEIVING PLATFORM LIFTING DEVICE


    Additional title:

    荷受台昇降装置


    Contributors:

    Publication date :

    2018-06-21


    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 / B65G TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS , Transport- oder Lagervorrichtungen, z.B. Förderer zum Laden oder Abladen / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



    LOAD RECEIVING PLATFORM LIFTING DEVICE

    ISHII KAZUNARI | European Patent Office | 2023

    Free access

    LOAD RECEIVING PLATFORM LIFTING DEVICE

    MATSUZAKI YOSHIHIKO | European Patent Office | 2016

    Free access

    LOAD RECEIVING PLATFORM STRUCTURE AND LOAD RECEIVING PLATFORM LIFTING DEVICE

    NOMURA TATSUYA / YAMADA KO / ABE SHINJI | European Patent Office | 2017

    Free access

    LOAD-RECEIVING PLATFORM LIFTING DEVICE

    MATSUZAKI YOSHIHIKO | European Patent Office | 2023

    Free access

    LOAD-RECEIVING PLATFORM LIFTING DEVICE

    IKEDA SHIGERU | European Patent Office | 2023

    Free access