To provide a device measuring the working efficiency at a construction site.
This progress state grasping device is provided with a timing means, an IC card 40 provided so as to transmit information specifying a material, a detector 15 attached to a material carrier means 200, detecting the information transmitted by the IC card 40, and transmitting the information again, and a computer system 50 receiving the information transmitted by the detector 15 and processing and storing it. This progress state grasping device is provided with such functions that the IC card 40 is constituted exchangeable at every time when the material carrier means 200 transmits the materials 300 and the computer system 50 stores a time starting the receiving of prescribed information from the detector 15 as a carrier start related time of the material related to the information transmitted by the IC card 40 and stores a time stopping the receiving of the prescribed information from the detector 15 as the carrier completion related time of the materials related to the information transmitted by the IC card 40.
| WO/2007/134459 | JOIST FORMING CONSTRUCTION MACHINE AND METHODS |
| JP2003064873 | CONSTRUCTION AUTOMATIC ANALYSIS SYSTEM |
| WO/1998/028506 | COMPOSITE FILLED HOLLOW STRUCTURE |
HANE TADASHI
TAKADA HIROO
INOKOSHI TOMONORI
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