| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a door opening and closing device simple in structure, lightweight, safe and gentle to wheelchair users and the weak and having high air-conditioning and heating efficiency without the wind blowing indoors. <P>SOLUTION: This door opening and closing device is provided with an outdoor side opening and an indoor side opening of almost the same widths at an entrance of a building. The outdoor side opening is provided with an outdoor side door, and the indoor side opening is provided with an indoor side door. Widths of the outdoor side door and the indoor side door are almost same as those of the respective openings in widths. A center partition wall is provided for partitioning a space between the outdoor side opening and the indoor side opening at a center along a passing direction. A door opening and closing driving means is provided for reciprocating the outdoor side door and indoor side door to the right and left while maintaining a point symmetrical position relation in the cross section around a center vertical axis of the center partition wall. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
