| 摘要 |
PROBLEM TO BE SOLVED: To provide a windmill type harmful bird/insect pest come-flying prevention device which avoids birds to prevent come-flying thereof by being able to rotate to diffuse light in all directions even if a wind blows from any direction, and can be easily and certainly assembled.SOLUTION: A windmill type harmful bird/insect pest come-flying prevention device includes a light reflective windmill 4 capable of rotating around a vertical axis through a rotary cylinder member 3 through which a support shaft member 2 is inserted. The rotary cylinder member 3 includes upper and lower cylinder members 60, 61 whose end portions 57, 59 are engaged and integrated with each other. An impeller 81 constituting the windmill 4 uses one impeller formation sheet, and is configured by forming a plurality of vane pieces 89 by appropriately making cuts in the impeller formation sheet, bending the respective vane pieces 89, and lapping end portions thereof. The vane piece 89 is formed with a vertical non-circular communication insertion hole, and a non-circular shaft part 84 between vertical pulling-out prevention flange parts 66, 75 of the rotary cylinder member 3 is nearly closely inserted through the communication insertion hole. |
