LOWER MAST STRUCTURE OF TOWER CRANE AND COMBINING DEVICE THEREOF

• Main Author: CHO, YONG GEUN
• Format: Patent
• Language: English; Korean
• Published: 06.05.2000
• Edition: 7
• Subjects: CRANES; HAULING; HOISTING; LIFTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; PERFORMING OPERATIONS; TRANSPORTING

PURPOSE: A lower mast structure of a tower crane is provided to obtain a needed structure by changing an angle of reinforcing members according to various environmental conditions and load conditions by connecting or removing the reinforcing members between a upper and a lower horizontal members using the combining device. CONSTITUTION: A lower mast structure is welded 16 pieces of combining devices by in a upper and a lower horizontal members, each combining device installed by separating from both ends of the horizontal members a little, and a reinforcing member are combined with combining devices of the upper and the lower parts as media. The combining device comprises of: a rectangular hexahedral combining unit of horizontal member(31) welded in the horizontal member; a combining unit of reinforcing member(32) formed a screw mount in the inner circumference to screw with the reinforcing member with a bolt and a nut as a medium by protruding in the middle of the combining unit of horizontal member(31); and a combining unit of wire prop(33) formed a combining hole combined in the wire prop by protruding in the lower face of the combining unit of horizontal member(31). 본 발명은 타워크레인의 하부마스트 구조 및 이를 위한 연결장치에 관한 것으로, 본 발명에 따른 하부마스트구조는 상하의 수평부재 각각에 2개씩 총 16개의 연결장치를 용접취부하되, 각각의 연결장치는 수평부재의 양끝단으로부터 약간 이격되어 취부되고, 이 상하부의 연결장치들을 매개로 보강부재가 상하로 가로지르면서 연결되되, 상기 연결장치는 직육면체의 몸체를 이루면서 수평부재가 취부되는 수평부재연결부와, 보강부재의 한쪽 끝단이 볼트와 너트를 매개로 나사체결되는 보강부재연결부 및, 와이어지주가 연결되는 와이어지주연결부로 이루어지게 되어, 타워크레인의 하부마스트의 구조를 용이한 방법으로 다양하게 변경할 수 있도록 된 것이다.