| 摘要 |
PURPOSE:To secure a high sealing function, by forming the mutual joint faces of both grooved faces of the end of frame member and the grooved joint member to be a widened taper section or the like and pressing and jointing both members through a packing material. CONSTITUTION:The mutual joint faces of both grooved walls of a grate 1 and a grooved joint member 2 are formed to be a widened taper section or that section having a semi-arc form with the groove and confronted with each other. A sheet packing 3 is interposed therebetween and the mutual members are forcibly jointed by the fitting recession 13 and the fitting protrusion 23. The suspended groove 15 of the grate 1 is connected to the lower end of the suspended bar hanging from the ceiling slab. And a liquid suitable for a liquid- tight groove is contained. And the protruded piece from a filter frame is inserted into the liquid to cut off ventilation between the system ceiling frame and the filter frame attached thereto. The grooved joint member 2 may be unified together with the packing material 3. |
