| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively provide an auxiliary roller capable of rapidly adjust the height of the auxiliary roller. SOLUTION: A base 1 and a roller holder 4 are connected by two sets of X-shaped link material 6 made freely revolvable by a central fulcrum pin 5 and, at this time, at least one of the fulcrums almost provided to both end parts of the base 1 includes a slide piece 7 movable in a longitudinal direction. A female screw part 8, of which the almost lower half part is eliminated, is provided to the slide piece 7, and a shaft 10 with an operation handle having the male screw part 9 fitted to the female screw part 8 is provided in the form almost piercing the gap between the fulcrums of both end parts of the base 1. At the same time, an arm 14 is provided in a state freely opened and closed so as to use the arm pin 34, which is fixed to an arm holder 33 on the base 1, as a revolving fulcrum and, in a state that the arm 14 is closed, the motion of the slide piece 7 is restricted only restricted in an almost horizontal direction. Further, at this time, a hook 20 is provided on the arm 14 in a freely revolvable manner and locked with the shaft 10 to suppress the opening of the arm 14. COPYRIGHT: (C)2007,JPO&INPIT
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