Abstract: A binder (10) has a base (14) having passages (14A, 14A) through which binding legs (13,13) can be inserted. The base (14) has a plurality of base-forming members (17,17) that can move relative to each other along the longitudinal direction. Each of the base-forming members (17,17) has first and second operating portions (22,23) that move when the base-forming members (17,17) are moved relative to each other. The second operating portions (23,23) move away from each other and press the binding legs (13,13) onto their binding positions when the first operating portions (22,22) are moved toward each other. The binding legs (13,13) are released and the first operating portions (22,22) move away from each other when the second operating portions (23,23) are moved toward each other.

Abstract: A binder 10 has a base 14 having passages 14A, 14A through which binding legs 13, 13 can be inserted. The base 14 has a plurality of base-forming members 17, 17 that can move relative to each other along the longitudinal direction. Each of the base-forming members 17, 17 has first and second operating portions 22, 23 that move when the base-forming members 17, 17 are moved relative to each other. The second operating portions 23, 23 move away from each other and press the binding legs 13, 13 onto their binding positions when the first operating portions 22, 22 are moved toward each other. The binding legs 13, 13 are released and the first operating portions 22, 22 move away from each other when the second operating portions 23, 23 are moved toward each other.