| 摘要 |
PROBLEM TO BE SOLVED: To easily spray fire-retardant foaming agent. ! SOLUTION: A fire spread prevention method includes a formation step of causing a fire spread prevention device 20 to discharge foaming agent to be foamed and solidified and discharging the discharged foaming agent to a fire-retardant material so as to form fire-retardant foaming agent 30 on a fire spread prevention object 10. The fire spread prevention device 20 includes a first nozzle 23 for discharging the foaming agent, and a second nozzle 25 for discharging the fire-retardant agent. The first nozzle 23 discharges the foaming agent, and the second nozzle 25 discharges the fire-retardant material to the discharged foaming agent, so as to form the frame-retardant foaming agent 30 on the fire spread prevention object 10. At that time, the frame-retardant material may be discharged to the foaming agent that is formed on the fire spread prevention object and currently foamed and solidified. Alternatively, the frame-retardant material may b |
