The crane job possible value display of the operational parameter in the portable type crane.

摘要

PURPOSE:To evaluate ability of a crane before the mobile crane is brought in a work spot by calculating an action parameter value displayed relating to the above exception required in the case of performing crane work under a known condition, when the other action parameter value is known except one of the action parameters in a functional relation to a hung up estimated load and a hang up permissible load of the mobile crane, in the case of a crane work possible value display device for the action parameter in the mobile crane. CONSTITUTION:A device is constituted of a hang up load input means 8 for inputting a hang up estimated load W, action parameter input means 9 for inputting the other action parameter value except one of action parameter outrigger overhang lengths Sa to Sd, boom elevation angle theta and a boom length L in a functional relation to a hang up permissible load of a mobile crane, arithmetic means 13 for calculating an action parameter value related to the above exception based on a signal from these input means and a display means 14 for displaying a calculation result of the arithmetic means.