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Recently, at major Japanese harbors, larger and automated loading and unloading facilities have been installed in order to achieve more efficient cargo handling. On the other hand, at small to medium sized local harbors, the introduction of multipurpose loading and unloading facilities with high mobility is desired in order to meet various needs under difficult economic circumstances. The mobile harbor crane developed by Sumitomo Heavy Industries Engineering & Services Co.,Ltd.(SES) is the first domestic model of a multipurpose and multifunctional wheeled crane. The mobility of the model has been dramatically improved by providing it with electric driving mechanism, which is a key factor for reducing the environmental pollutions. SESfs mobile harbor crane has a minimum turning radius that has not been achieved by any other crane manufacturers. This paper reports the mechanical simulation analysis to optimize the driving devices, and the comparison with the field test results.
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