DRILL SCREW, INSTALLATION METHOD OF SOLAR CELL MODULE USING THE SAME AND PHOTOVOLTAIC POWER GENERATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a drill screw capable of reducing the load on a part to be screwed in.SOLUTION: A drill part 202 is formed at the front side. A first pilot part 204 is provided at the base side of the drill part 202. A thread part 206 is formed at the base side of the first pilot part 204. The thread part 206 includes a shaft part 214 and a screw thread 216. A second pilot part 208 is provided at the base side of the thread part 206. A screw head 210 is formed at the base side of the second pilot part 208.SELECTED DRAWING: Figure 1