| 摘要 |
PURPOSE:To make it possible to transport concrete in correct compositional type by a method wherein a confirmation signal to specify the compositional type is sent from a dump truck to a conveying apparatus in the lowest course and the delivery of the concrete is done only when the specified compositional type coincides with the compositional type, which is displayed on the conveying apparatus in the lowest course and the compositional type is displayed. CONSTITUTION:The operator of a dump truck 3 positions the dump truck 3 just below the hopper of a hopper station 2 and, after that, confirms a compositional type display 21 on the hopper station and finally depresses the push button of the corresponding compositional type on a wireless operating set 31. A confirmation signal representing the compositional type, which corresponds to the depressed push button, is transmitted from a wireless operating set 32 to a wireless receiver 16 in a control device 1. Only when the composional type coincides with the information memorized in a hopper station memory 14, a push button box is rolled down. Next, through the operation of said push button box by the operator, a hopper is opened and concrete is delivered from the hopper station 2 to the dump truck 3 and a display lamp 35 is lit in order to display the delivered compositional type. |
