| 摘要 |
PURPOSE:To surely prevent the infiltration of rainwater by movably inserting an arm projected from a body of revolution into a slot section formed on an opening section case while an elastic sealing member installed to the edge section of the whole circumference of the slot section is brought into contact elastically with the outside surface of the body of revolution extending over the whole circumference. CONSTITUTION:A casing 9 is mounted internally into a cylindrical gate post 1, and a motor 2 with a speed reducer is set up to the casing 9. A body of revolution 3 is fitted rotatably to the casing 9 through a bearing 10. A threaded hole section 12 is shaped to the body of revolution 3, and the male thread section 13 of an arm 4 is screwed into the threaded hole section 12. The arm 4 is inserted movably into an opening section 5 for shifting the arm formed extending over both sidewalls in one corner section of the gate post 1, and the end section of the door 6 of a gate is installed at a nose section projected outside of the gate post 1 of the arm 4 by bolts, etc. An elastic sealing member 16 having elasticity such as a neoprene rubber is mounted at the edge section of the whole circumference of the slot section 15 of an opening section case 14, and the sealing member 16 set up at the edge section of the whole circumference of the slot section 15 is brought into contact elastically with the arcuate outside surface of the body of revolution 3 extending over the whole circumference. |
