Separation device, trigger device, apparatus fixture separator, and spacecraft separation device

A separation device used for a spacecraft to release a mechanical joint by an electrical signal, comprising:

• an upper separation member;
• a lower separation member disposed on the upper separation member;
• a first wire wound around the upper separation member and the lower separation member to band the upper separation member and the lower separation member and fused by applying electric current;
• and
• a second wire wound around the upper separation member and the lower separation member at a position away from the first wire to band the upper separation member and the lower separation member and fused by applying electric current, wherein
• the first wire and the second wire are disposed in positions so that, in a state where the upper separation member or the lower separation member receives force in a direction away from each other, the upper separation member and the lower separation member are positionally displaced relatively by fusion of one of the first wire and the second wire, and banding by another one of the first wire and the second wire is released.