Patent ID: 9540218
Date: 2017-01-10
CPC Classifications: B66C,G06F

Claim:
1. A work plan verification device that includes a boom telescopically formed and horizontally turnably and derrickably provided on a vehicle body of a crane and that is used to move a suspension load suspended from a tip end of the boom through a rope, the work plan verification device, comprising: a boom-derricking cylinder provided between the vehicle body of the crane and the boom and that derricks the boom; a cylinder pressure sensor attached to the boom-derricking cylinder and that detects a pressure of the boom-derricking cylinder; a boom length-sensor attached to the boom and that detects a length of the boom; a derrick angle sensor attached to the boom and that detects a derrick angle of the boom; an image creator that creates an image when viewing a lower portion from the tip end of the boom; a monitor that displays the image; a movement position inputter in that an operator indicates a movement position of the suspension load on the image displayed on the monitor; and an arithmetic part that determines whether the movement position is indicated on the image and that acquires a three-dimensional coordinate position of the movement position, the three-dimensional coordinate position corresponding to the movement position indicated on the image, when it is determined that the movement position is indicated on the image, wherein the arithmetic part calculates a total rated load based on the acquired three-dimensional coordinate of the movement position and determines whether the suspension load is suspended from the boom based on a change amount in the pressure of the boom-derricking cylinder acquired from the cylinder pressure sensor or a change amount in the derrick angle of the boom acquired from the derrick angle sensor, when the suspension load is suspended from the boom, the arithmetic part calculates an actual load of the suspension load based on the pressure of the boom-derricking cylinder acquired from the cylinder pressure sensor, the length of the boom acquired from the boom-length sensor and the derrick angle of the boom acquired from the derrick angle sensor and calculates a load factor which is a ratio of the actual load to the total rated load, and displays the load factor on the image, when the suspension load is not suspended from the boom, the arithmetic part determines whether a virtual load is input into the movement position inputter and calculates a load factor which is a ratio of the virtual load to the total rated load when the virtual load is input, and displays the load factor on the image.