在对门窗工程进行检验时,我们发现上悬式窗扇有反弹现象。当上悬式窗扇不受插销、风钩和其他外力约束时,仅受到其自重G 和支座(合页)反力 F 的作用,此二力等值反向,窗扇的重心大约位 In the inspection of the doors and windows, we found that the upper hanging sash had a rebound phenomenon. When the upper suspension sash is not constrained by bolts, wind hooks and other external forces, it is only affected by its own weight G and the reaction force F of the bearing (hinge), and the two forces are reversed and the center of gravity of the sash is approximately