| 摘要 |
PROBLEM TO BE SOLVED: To return and close a door without leaning forward in the outside of a door frame by hanging down the other end of a string-like body fixing one end on the free end of the door in a vertical frame to fix a weight, and falling down the weight in closing the door. SOLUTION: One end of a string-like body 3 is fixed on the upper corner of the free end side of a door 2 hinged on a door frame 1, and the other end is hung down in the vertical frame 11 of the door frame 1 through a through hole 14 and a fixed pulley 15. Next, a weight 31 having a recess part 32 is fixed on the other end of the string-like body 3. In opening the door 2, the weight 31 is supported on a disk 16 supported in the vertical frame 11, and in closing the door 2, the door 2 is drawn through the string-like body 3 by falling the weight 31 from the disk 16 to be circumscribed on the door frame 1. Thereby the door fixed by opening in this side can be returned and closed without leaning forward in the outside of the door frame 1.
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