| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a loose-leaf binder which can easily and securely fix a half ring part in a closed position.SOLUTION: A loose-lead binder 1 includes a plurality of pairs of half ring parts 3a, 3b which can move between a closed position in which respective tip end parts of the pair of half ring parts 3a, 3b come close to each other and form a ring shape, and an open position in which the respective tip end parts separate from each other by rotating and displacing respective boards 2a, 2b around a shaft part 4. A gap G which allows relative displacement of the respective boards 2a, 2b along a longitudinal direction is formed between bearing cylinder parts 5a, 5b adjacent to the boards 2a, 2b in the longitudinal direction. A coil spring 6 which biases the two boards 2a, 2b mutually along the longitudinal direction is arranged on a rear surface B side of the boards 2a, 2b. At least a pair of hooking and engaging parts 7a, 7b which are hooked mutually based on biasing force of the coil spring 6 and maintain the half ring parts 3a, 3b in the closed position are arranged on the respective surfaces F of the boards 2a, 2b.</p> |
