| 摘要 |
PURPOSE:To enable to closely contact a door to the circumference of the aperture part of a tank to be used for airtight sealing by moving the door even when there is a dimensional irregularity in each part by a method wherein the coupling structure located between the door and a conveying stand is composed of a through hole and the pin loosely inserted into the through hole. CONSTITUTION:As the pin 40 fixed to the coupling protruded piece 38 located on the side of a conveying stand 24 has the diameter smaller than the inside diameter of the through hole 36 formed on the supporting fitting 36 attached to a door 21, the door 21 can be tilted a little in the left and right directions as shown by the phi1 and phi2 in the diagram, thereby enabling the door 21 to come in contact gaplessly with the entire circumference of the aperture parts 9a and 10a of the tanks 9 and 10 be used for airtight sealing by merely moving it together with a stand 19. As the tilting of the door 21 can be stopped by the contact of the door 21 and the upper and the lower corner parts 38a and 38b of the coupling protruded piece 28, the angles of inclination of phi1 and phi2 can be brought to the suitable value by properly selecting the measurements D and E with which the coupling protruded piece 38 is divided into the upper and the lower parts at the contact point 40a located between a through hole 35 and the pin 40, the measurement F from the contact point 40a to the tip of the coupling protruded piece 38, and the size of the gap (t) located between the tip of the coupling protruded piece 38 and the surface of the door 21.
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