| 摘要 |
A joint assembly for connecting at their ends a pair of ducts each consisting of side walls formed of sheet material and having a generally quadrilateral cross sectional configuration is provided by a plurality of joint sections each including a pair of perpendicularly extending flanges formed with double walls. The joint sections are mounted on the ends of each of the ducts with a duct wall extending into engagement between the double walls of one of the flanges of a joint section. Angle plates including a pair of arms and a corner region are engaged with the arms thereof extending into engagement between the double walls of the other of said flanges and by thus mounting a plurality of joint sections and angle plates at the end of each of said ducts, the ducts may be joined together by fastening means which extend through the corner regions of the angle plates. The corner regions and the arms of each of the angle plates are brought into facing relationship along lateral surfaces thereof when the ducts are joined together and the angle plates are configured with a curved configuration along such lateral surfaces so that the ends of the arms produce a pincer effect tending to enhance the tightness of the joint assembly.
|
