PROBLEM TO BE SOLVED: To provide an upper turning body capable of securing a space for arranging a winch and a self-actuated detaching/attaching device, as well as a space for arranging multiple pieces of mast tip sheave, to reduce a size and a weight of a mast.SOLUTION: In an upper turning body, when a mast 30 is in a fallen state, fallen toward a rear side X2, a main pole 40 is arranged further toward a laterally inner side Y1 with respect to a self-actuated detaching/attaching device 23, as well as toward a laterally outer side Y2 with respect to a winch 15. A main pole inclined part 43 extends from a tip end side A2 end part of a main pole base end side part 41 to the tip end side A2, and is inclined with respect to the mast axis direction A so as to be positioned at closer to the lateral inner side Y1 as approaching to the tip end side A2. A main pole tip end side part 45 extends in the mast axis direction A from the tip end side A2 end part of the main pole inclined part 43 to the tip end side A2.SELECTED DRAWING: Figure 3
【課題】ウインチおよび自力脱着装置を配置するスペースを確保でき、マスト先端シーブを必要な枚数設けるスペースを確保でき、マストを小型化および軽量化できる。【解決手段】マスト30が後側X2に倒伏した倒伏状態のとき、主柱40は、自力脱着装置23よりも横方向内側Y1に配置され、かつ、ウインチ15よりも横方向外側Y2に配置される。主柱傾斜部分43は、主柱基端側部分41の先端側A2端部から先端側A2に延び、先端側A2ほど横方向内側Y1に配置されるようにマスト軸方向Aに対して傾斜する。主柱先端側部分45は、主柱傾斜部分43の先端側A2端部から先端側A2に、マスト軸方向Aに延びる。【選択図】図3
UPPER TURNING BODY
上部旋回体
2017-09-14
Patent
Electronic Resource
Japanese
IPC: | B66C Krane , CRANES |