To provide a bottom pin supporting structure of a tower crane capable of preventing an excessive moment and a horizontal force from acting on a mast, a frame and a base, and capable of improving stability while reducing cost.SOLUTION: The bottom pin supporting structure of a tower crane comprises: a stay bolt 16 to connect a mast 2 with a base-isolated structure 15 (or an ordinary structure); a connecting part 17 that is installed on a lower part of the crane at a position below the stay bolt 16 and switchable between a state in which the lower part of the crane is divided into upper and lower sections, and a fixed state; a fastening mechanism 18 to maintain the connecting part 17 in the fixed state; and a self-aligning type bearing 19 that is interposed between the upper and lower sections of the divided lower part of the crane with the connecting part 17 released from the fixed state assumed by the fastening mechanism 18, and turnably supports the lower part of the crane at the connecting part 17 while supporting the horizontal and vertical loads acting on the lower part of the crane.SELECTED DRAWING: Figure 1
【課題】マスト、架台、基礎に過大なモーメントと水平力が作用することを防止し得、コストダウンを図りつつ安定性向上を図り得るタワークレーンの下部ピン支持構造を提供する。【解決手段】免震構造物15(或いは単なる構造物)に対しマスト2をつなぐステー16と、ステー16より下方位置におけるクレーン下部に設定され且つクレーン下部を上下に分断した状態或いは固定した状態に切換自在な連結部17と、連結部17を固定した状態に保持する締結機構18と、締結機構18による連結部17の固定状態を解除し上下に分断したクレーン下部間に介装され且つクレーン下部に作用する水平荷重及び垂直荷重を支持しつつクレーン下部を連結部17において回動自在に支持する自動調心形軸受19とを備える。【選択図】図1
BOTTOM PIN SUPPORTING STRUCTURE OF TOWER CRANE
タワークレーンの下部ピン支持構造
2020-06-25
Patent
Electronic Resource
Japanese
IPC: | B66C Krane , CRANES |