Protective device

A protective device comprising:

• a plurality of protective bodies connected so as to separate an inside accommodating a movement path of a moving body moving in a predetermined direction from an outside and so as to be located sequentially and continuously in a moving direction of the moving body, the plurality of protective bodies including a first protective body and a second protective body, the first protective body located at a first end being connected to a predetermined end of an area to be protected, the second protective body located at a second end being connected to the moving body, the plurality of protective bodies being configured to be expanded and contracted as a whole by movement of the moving body, wherein:
• the protective device is provided with:
• a structural body having a groove that is located at the inside, has a top opening that opens upward in a vertical direction, and forms a flow path at the inside of the plurality of protective bodies, the structural body being arranged along the plurality of protective bodies below the protective bodies with a predetermined distance from lower end surfaces of the protective bodies or arranged along the plurality of protective bodies such that lower ends of the protective bodies are inserted in the groove through the top opening of the groove;
• a nozzle connected to the structural body and configured to eject a liquid into the groove of the structural body, that is located at the inside;
• and
• a liquid supply source configured to supply a pressurized liquid to the nozzle.