| 摘要 |
<p>PURPOSE:To make the height of a bellows lower than that of a conventional bellows when the bellows is shrunk by increasing the shrinking range of the bellows by arranging the folded parts without mutual overlapping on the same straight line in parallel to the shrinking direction, even when the bellows is shrunk. CONSTITUTION:The folded parts of the bellows are prevented from mutual overlapping on the same straight line in parallel to the shrinking direction of the bellows when it is shrunk. The folded parts 11, 12, 13, 14, 15, 16, 17, 18, and 19 are provided so as not to occur mutual overlapping of those parts on the same straight line in parallel to the shrinking direction (direction of arrow head A) of the bellows 10 when the bellows 10 is shrunk, and the folded parts can be overlapped at every fourth folded part like the folded parts 11, 15, and 19. Thereby, it is possible to reduce influence by the thickness of the folded part to 1/2 that of the conventional bellows as for the height of the bellows 10 when it is shrunk, and to make the height of the bellows 10, when it is shrunk, at a low height. Also, the bed device is comprised of an elevator to elevate a bed part 6 on which a subject is placed, the bellows 10 provided so as to cover the periphery of the device, and a base part 7.</p> |
