| 摘要 |
PURPOSE:To permit a door to be held airtightly by superposing the door onto the flange on the front surface and tightening the outer peripheral sides of the flange and of the door onto a frame body having a U-shaped section. CONSTITUTION:The positions of the opened port part 13 of a frame body 12 having a U-shaped section and of a door 14 are coincided by operating a cylinder 19. Then, the door 4 is turned to be superposed with the flange 3 of a body 1, penetrating through the closed port part 13 of the frame body 12, and then the frame 12 is shifted downward by operating the cylinder 19. Therefore, the wedge part 18 on the back surface of the convex part 16 on the front-side plate 12b of the frame body 12 is engaged with the wedge part 17 on the front surface of the convex part 6 of the door 4 are engaged, and the door 4 is firmly superposed onto the flange 3 surface and held airtightly. |
