Thermal insulating structure

A thermal insulating structure comprising:

• at least one retainer that protrudes from a to-be-insulated surface exposed to a vacuum space;
• at least two first multilayer vacuum insulating sheets that are adjacent to each other in a first direction with the retainer positioned therebetween, the at least two first multilayer vacuum insulating sheets covering the to-be-insulated surface;
• at least two second multilayer vacuum insulating sheets that are adjacent to each other in a second direction orthogonal to the first direction with the retainer positioned therebetween, the at least two second multilayer vacuum insulating sheets extending along a boundary between the first multilayer vacuum insulating sheets in a manner to cover the boundary;
• at least two third multilayer vacuum insulating sheets that are adjacent to each other in the first direction with the retainer positioned therebetween, the at least two third multilayer vacuum insulating sheets covering the first multilayer vacuum insulating sheets and the second multilayer vacuum insulating sheets;
• and
• a keep plate that is fixed to the retainer and holds the first multilayer vacuum insulating sheets, the second multilayer vacuum insulating sheets, and the third multilayer vacuum insulating sheets, wherein
• the first multilayer vacuum insulating sheets adjacent to each other are joined to the to-be-insulated surface at least in a vicinity of each retainer by a pair of first hook/loop fasteners,
• the second multilayer vacuum insulating sheets are joined to the first multilayer vacuum insulating sheets adjacent to each other by pairs of second hook/loop fasteners, and
• the third multilayer vacuum insulating sheets adjacent to each other are joined to the second multilayer vacuum insulating sheet by pairs of third hook/loop fasteners.