PROBLEM TO BE SOLVED: To provide an expansion leg capable of preventing rattling reliably and a portal traveling crane using the expansion leg.SOLUTION: In an expansion leg, a plurality of hollow square column bodies are assembled telescopically, and rattling prevention means is provided. The rattling prevention means comprises an upper rattling prevention mechanism and a lower rattling prevention mechanism provided in the lower part of the upper rattling prevention mechanism. The upper rattling prevention mechanism and the lower rattling prevention mechanism comprise respectively: an opening formed in a first column body; a pressing member which comprises a projection part to be inserted into the opening, which is provided in the central part of the pressing member, and in which a bolt insertion port is formed in both end parts; a plate which is sandwiched between both end parts of the pressing member and the first column body and welded to the first column body, and in which a bolt hole is formed; and a bolt which is inserted into a bolt insertion port and screwed to the first column body through the plate. By fastening the bolt, the projection part presses a second column body inserted into the first column body, and thereby preventing the rattling of the second column body.
【課題】がたつきを確実に防止することができる伸縮脚およびこの伸縮脚を使用した門型走行クレーンを提供する。【解決手段】複数本の中空角状柱体が入れ子式に組み立てられた、がたつき防止手段を備えた伸縮脚において、前記がたつき防止手段は、上部がたつき防止機構と前記上部がたつき防止機構の下方部に設けられた下部がたつき防止機構とからなり、前記上部がたつき防止機構および前記下部がたつき防止機構は、それぞれ第1柱体に形成された開口と、中央部に前記開口内に挿入される突部を備え、両端部にボルト挿入口が形成された押圧部材と、前記押圧部材の前記両端部と前記第1柱体との間に挟み込まれ、前記第1柱体に溶接された、ボルト孔が形成されたプレートと、前記ボルト挿入口内に挿入され、前記プレートを介して前記第1柱体に螺合するボルトとからなり、前記ボルトを締めることによって、前記突部が前記第1柱体内に挿入された第2柱体を押圧し、かくして、前記第2柱体のがたつきを防止する。【選択図】 図1
EXPANSION LEG AND PORTAL TRAVELING CRANE
伸縮脚および門型走行クレーン
2015-08-06
Patent
Electronic Resource
Japanese
IPC: | B66C Krane , CRANES |