| 摘要 |
A trolley for a tower crane is provided to allow a worker to accurately check an installation state of the trolley, an assembly state of parts, and aging of the parts on a platform. A trolley for a tower crane includes jib multi-contact devices(30), platforms(50), and a hook block coupling device(60). Each of the jib multi-contact devices has a fixing shaft(31) coupled at each corner of a frame(20), a housing(32) coupled at one end of the fixing shaft to move clockwise or counterclockwise, first and second side guide rollers(34,36) installed at both lower ends of the housing, first and second plane roller pins installed at both sides of the housing, and first and second plane guide rollers(38,40) coupled with the first and second plane roller pins. The jib multi-contact device guides the frame to horizontally move along a main jib. Each of the platforms has vertical brackets(51) extended long from a lower part thereof, horizontal brackets(52) to connect lower ends of the vertical brackets, and a foothold(53) received at the horizontal brackets. The platform is installed under the frame to couple parts with the frame or inspects the coupled parts. The hook block coupling device has a pair of reinforcing brackets(61) fixed to a middle part of the frame, coupling pieces(62) fixed to the pair of reinforcing brackets and having through holes(63), a hook block(65) coupled with a hook, and coupling pins(64) inserted into the coupling holes of the coupling pieces and the hook block to support the hook block to the frame. |
