To provide a method of controlling a slab conveying crane capable of lowering a slab being gripped so as to prevent the generation of excessive impact and collision noise when the slab is lowered with both ends of the slab being hung down.SOLUTION: A slab gripping apparatus SL is equipped with a detection apparatus which is at a slab height position of a slab center, the detection apparatus detecting a state in which the slab center projects against hang-down generated at both ends of a slab SB when the slab SB is gripped and wound up using the slab gripping apparatus SL, and when the slab SB is lowered to release gripping, control is performed such that until a detected value of a detector at the slab height position returns to a value in a placement state, which was detected and stored in advance by a detector at the slab height position, prior to the projection of the slab center, while maintaining a state in which a part of load of the slab SB on the slab gripping apparatus SL is applied, the slab is wound down gradually, and the gripping is released after the projection in the vicinity of the slab center reduces or vanishes.SELECTED DRAWING: Figure 1
【課題】スラブの両端が垂れ下がった状態でスラブを降ろす際に、過大な衝撃と衝突音が発生しないように掴みスラブを降ろすことができるスラブ搬送用クレーンの制御方法を提供すること【解決手段】スラブ掴み装置SLでスラブSBを掴んで巻き上げた時に、スラブSBの両端に発生する垂れ下がりに反してスラブ中央が盛り上がる状態を検出する、スラブ中央のスラブ高さ位置の検出装置をスラブ掴み装置SLに装備し、スラブSBを降ろして掴みを解放する際に、スラブ高さ位置の検出器の検出値が、該スラブ高さ位置の検出器により予め検出、記憶しておいたスラブSBがスラブ中央が盛り上がる前の載置状態の値に戻るまで、スラブ掴み装置SLに掛かるスラブSBの荷重の一部が掛かった状態を保持しつつ、徐々に巻き下げるように制御し、スラブ中央付近の盛り上がりが小さく又は無くなってから掴みを解放するようにする。【選択図】図1
METHOD OF CONTROLLING SLAB CONVEYING CRANE
スラブ搬送用クレーンの制御方法
2022-06-15
Patent
Electronic Resource
Japanese
IPC: | B66C Krane , CRANES |
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