PROBLEM TO BE SOLVED: To ensure the safety by softly landing a hand part with an operator's will in the case of emergency stop of an air source caused by power failure, disconnection of an air hose, or the like at a no-load time.SOLUTION: The non-load lowering safety circuit includes: an air discharge pipe for emergency stop and a moderately lowering valve. After an air source is brought to an emergency stop and a cylinder is positionally held at the no-load time, the cylinder internal pressure of the cylinder is increased by the movement for lowering a hand part by an operator. The increased cylinder internal pressure switches the moderately lowering valve through the air discharge pipe for emergency stop. Thereby the air inside the cylinder is discharged from the moderately lowering valve so as to lower the hand part.SELECTED DRAWING: Figure 6
【課題】無負荷時において、停電時やエアホース外れ時などのエア源緊急停止時に、作業者の意思でハンド部をソフトランディングさせ、安全を確保する。【解決手段】緊急停止時エア排出配管と緩下降バルブを備え、無負荷時にエア源が緊急停止しシリンダが位置保持した後に作業者がハンド部を下降させようとする動きで前記シリンダのシリンダ内圧を上昇させ、上昇した前記シリンダ内圧が前記緊急停止時エア排出配管を経由して前記緩下降バルブを切替え、前記緩下降バルブから前記シリンダ内のエアを排出し、前記ハンド部を下降させる。【選択図】図6
NON-LOAD LOWERING SAFETY CIRCUIT OF PNEUMATIC CARGO TRANSPORTING MACHINE
エア式荷役物運搬機の無負荷下降安全回路
2018-11-29
Patent
Electronic Resource
Japanese
IPC: | 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 / B25J Manipulatoren , MANIPULATORS |
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