PROBLEM TO BE SOLVED: To provide a derrick which can smoothly and efficiently perform assembling/disassembling work for a steel tower by allowing a mast and a boom to easily protrude through an opening of the steel tower.SOLUTION: A derrick 1 is configured so that one end of a boom 3 is derrickably mounted on a mast 2 in a truss structure, which is fixed perpendicularly to an upper end part of a steel tower T being assembled or disassembled and moves up and down in the steel tower according to progress of assembling/disassembling work; a hook 5 at a tip of a hanging-up wire 4 is hung down from a tip of the boom; the other end of the boom is wound up with a winch 8, then protruded to hang up and down a hung cargo, wound up with a derricking winch 13 by locking a derricking wire 12 to the boom 3, and then protruded so as to derrick the boom 3. The boom 3 is structured in a nearly recess shape in a planar view in which a surface opposing to the mast 2 is opened, which receives an opposing part of the mast 3 therein in an erected state, where an occupied width in a direction in which the boom 3 and the mast 2 are lined is reduced.SELECTED DRAWING: Figure 1
【課題】マスト及びブームが鉄塔の開口から容易にせり出て、鉄塔の組立・解体作業を円滑に効率よく行うデリックを提供する。【解決手段】組立・解体途中の鉄塔Tの上端部に垂直に固定され、組立・解体作業の進捗に応じて鉄塔内を昇降移動するトラス構造のマスト2に、ブーム3の一端を起伏自在に取り付け、吊上げワイヤ4の先端のフック5をブーム先端から吊り下ろし、他端を吊上げウィンチ8により巻き取り,繰り出して吊り荷を上げ下ろし操作すると共に、ブーム3に起伏ワイヤ12を係止して起伏ウィンチ13により巻き取り,繰り出してブーム3を起伏操作するようにデリック1を構成する。ブーム3は、マスト2との対向面を開放させた平面視略凹状に構成し、起立状態でマスト3の対向部を内部に受け入れて、ブーム3とマスト2の並び方向の占有幅を縮小させた。【選択図】図1
DERRICK FOR ASSEMBLING/DISASSEMBLING STEEL TOWER
鉄塔組立・解体用デリック
2017-07-06
Patent
Electronic Resource
Japanese
IPC: | B66C Krane , CRANES |
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