| 摘要 |
PROBLEM TO BE SOLVED: To provide a belt height adjustment device, simple in operation, and characterized in even a simple machine constitution and a small number parts.SOLUTION: A belt height adjustment device has a belt deflection type connection tool 3 relatively rotatably movable with a lever 2 pivotally connected to a support structure 1, and also has a fixing device, and can be fixed to the support structure 1 to a relative pivotal movement by the fixing device. The fixing device is formed of a latch 4 and a tooth-shaped part 5, and is constituted so as to check the pivotal movement of the lever 2 in a lower direction, and is constituted so as to automatically engage in a predetermined lever angle position in the movement in the upper direction of the lever 2. When the lever further moves upward, the lever is invalidated when getting over an upper side fixing position, and the lever 2 can also be brought to a predetermined structurally lower position without staying in a fixing position, and is operated again when moving upward in succession to the lever 2, and checks a downward movement of the lever 2. |
