A study on the relationship between clamping angle of a locker and initial clamping force in the wedge type rail clamp for a container crane

摘要

The rail clamp is the device to prevent that a container crane slips along rails due to the wind blast as well as to locate the crane in the set position through loading and unloading containers on a vessel in the quay. In order to design the rail clamp, we need to determine the proper wedge angle to minimize the sliding distance of a roller and the proper clamping angle of a locker to generate the initial clamping force of a jaw pad. The researches for the proper wedge angle have conducted. So in this study we look into the relationship between the clamping angle of a locker and the initial clamping force in the rail clamp with wedge angle of 10°. The initial clamping force of the jaw pad was determined by the clamping angle of the locker. Therefore after we measured the locking force of a locker and the tensile stress of extension bar with respect to the clamping angle of a locker, such as 2.18, 3.05, 3.92, 4.80°, we compared the results with the FEA results.