| 摘要 |
PROBLEM TO BE SOLVED: To easily install a balancer into an upper frame without increasing the depth size of the upper frame. SOLUTION: In the double-hung window or the door with the double-hung window, vertically movable sliding screens 2, 3 are mounted into a frame body 1 comprising an upper frame 1a, a lower frame 1b and left-right stiles 1c, 1c, and a balancer 13 hanging the movable sliding screens 2, 3 in a manner that they can be stopped at arbitrary height positions through hanging materials is set up into the upper frame 1a. The upper frame 1a is composed of at least an outdoor surface 20a and a top face 20b, and a cover material 21 with an indoor surface 21a and an underside 21b covering the opened indoor side and the lower side is fitted removably to the upper frame 1a.
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