| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sheet punching device with a simple structure having a punch drive mechanism of applying a lever crank mechanism, and having the switching function of two holes and four holes mainly used much, for example, in a European zone. <P>SOLUTION: The sheet punching device includes a drive source, two sets of punch mechanisms A, B, and a switching mechanism. The punch mechanisms A, B have a punch for punching a sheet material by meshing with a die hole and a lever crank mechanism for driving the punch for punching, respectively. The switching mechanism has a main drive part for rotating in both directions according to the drive direction of the drive source and a driven part connected to the main drive part and rotating in one direction. The driven part is connected to a lever crank mechanism for driving the punch mechanism A, while the main drive part is connected to a lever crank mechanism for driving the punch mechanism B. In the sheet punching device, by the switching of the drive direction of the drive source, either simultaneous driving of the punch mechanisms A, B or one side driving of the punch mechanism B is switched. <P>COPYRIGHT: (C)2012,JPO&INPIT |
