HEAT INSULATING STRUCTURE AND WOOD SCREW USED FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide heat insulating structure for fastening and fixing a plate material 3 to a lower wood material 1 by a wood screw 4 through a heat insulating material 2 formed from a material easy to be deformed, and for preventing compression deformation of the heat insulating material 2 when fastening, and to provide the wood screw for use therein. SOLUTION: The wooden screw 4 is formed with a tip part screw 5 on a tip side, formed with a neck part screw 7 in a root part of a head part 6, and provided with a screw-less part 8 between them. The tip part screw 5 and the neck part screw 7 are spirally formed in the same direction, and length of the neck part screw 7 is formed shorter than that of the tip part screw 5, and screw pitch P2of the neck part screw 7 is formed larger than screw pitch P1of the tip part screw 5. COPYRIGHT: (C)2006,JPO&NCIPI