QUAY CRANE AND CONTROL METHOD OF QUAY CRANE

To provide a quay crane capable of suppressing weight increase of the folding boom while accurately maintaining the horizontal position of the tip boom by the auxiliary stay at the erected state of the folding boom and provide a control method of this quay crane.SOLUTION: An auxiliary stay 15 consists of columnar members capable of supporting the compression force in its extending direction, a pedestal 16 is installed on a top face of an intermediate boom 4a, and the auxiliary stay 15 is supported from below by the pedestal 16 in the lodged state of a folding boom 4 where the intermediate boom 4a and a tip boom 4b are laid in the horizontal state.SELECTED DRAWING: Figure 2 【課題】中折れブームが起立状態のとき補助ステーにより先端ブームの水平姿勢を精度よく維持するとともに、中折れブームの重量増加を抑制できる岸壁クレーンおよびこの岸壁クレーンの制御方法を提供する。【解決手段】補助ステー１５を延在方向の圧縮力を支持可能な柱状部材で構成して、中間ブーム４ａの上面に台座１６を設置して、中間ブーム４ａと先端ブーム４ｂとが水平となる中折れブーム４の倒伏状態のときに台座１６が補助ステー１５を下方から支持する。【選択図】図２