To provide a technique of improving work efficiency for a vacuum lift device which does not require power.SOLUTION: In the vacuum lift device, a valve device and a valve switching unit are arranged outside a cylinder and a pressing member for operating the valve switching unit is provided on a piston rod that is formed integrally with a piston and has an upper part protruding to the outside from a top surface of the cylinder. The pressing member rotatably drives a rotating shaft, which is provided in the valve switching unit, in one direction every time the piston is hung down. A valve mechanism of the valve device is switched from an opened state to a closed state or alternatively switched between the opened state and the closed state. The pressing member includes a rotation plate that has a display surface on which a first portion showing the opened state and a second portion showing the closed state are arranged in a circumferential direction and rotates in synchronization with the rotating shaft and a state notification unit for notifying of a state of the valve mechanism by indicating one of the first portion and the second portion.SELECTED DRAWING: Figure 1
【課題】動力を必要としないタイプの真空リフト装置において、作業効率を向上させる技術を提供することにある。【解決手段】真空リフト装置は、バルブ装置及びバルブ切換ユニットをシリンダの外部に配置すると共に、ピストンと一体に形成され、上部がシリンダの上面より外部に突出されたピストン棒にバルブ切換ユニットを操作するための押圧部材を設け、押圧部材は、ピストンが吊り下ろし操作される毎に、バルブ切換ユニットに備えられた回転軸を一方向に回転駆動し、バルブ装置の弁機構を開状態から閉状態に、又は、閉状態から開状態に交互に切り換え、開状態を表す第1部分及び閉状態を表す第2部分が周方向に配列された表示面を有し、回転軸に連動して回転する回転板と、第1部分及び第2部分の一方を指し示すことによって、弁機構の状態を報知する状態報知部とを備える。【選択図】図1
VACUUM LIFT DEVICE
真空リフト装置
2020-03-05
Patent
Electronic Resource
Japanese
IPC: | B66C Krane , CRANES |