| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve overall appearance and to reduce a minimum length as further as possible when folded by contracting a door body. <P>SOLUTION: An expansion gate door comprises a door body 5 including a pantograph mechanism 6 which is configured by combining tilting links 19, 20 crossing vertical frames 7 in three crossing portions 21-23 in a vertical direction. The door body 5 further includes a fixed pivot 26 and movable pivots 27, 28. The fixed pivot 26 pivots the crossing portion 22 which is intermediate in the vertical direction of the pantograph mechanism 6, to the vertical frame 7 so as not to be moved vertically. The movable pivots 27, 28 pivot both the upside and downside crossing portions 21 and 23 to the vertical frame 7 so as to be moved vertically. The door body 5 includes the pantograph mechanism 6 which is expanded/contracted independently for each of both left-side and right-side door body portions 8 and 9 of a sectional vertical frame 71. Fixed pivots 36, 37 are disposed up and down for separately pivoting upper links 32, 33 and lower links 34, 35 of both the door body portions 8, 9 to the sectional vertical frame 71. Movable pivots 39-42 of the upper and lower crossing portions 21 and 23 are provided for each of the door body portions 8, 9 so as to be freely movable up and down with respect to the sectional vertical frame 71. <P>COPYRIGHT: (C)2013,JPO&INPIT |
