| 摘要 |
PURPOSE:To reduce the depth of a draw-out device and the installation area for an enclosed switchboard, by making the inserting or drawing-out female screw of a draw-out device slidable, by coupling a link mechanism for driving a shutter to the inserting or drawing-out female screw, and by opening or closing the shutter without driving a switch. CONSTITUTION:When an inserting or drawing-out handle 4 is rotated in a direction of inserting a switch 1, force to make the switch 1 and an inserting or drawing-out female screw 60 approach each other is produced. But the switch 1 is prevented from moving backwards, and only the inserting or drawing-out female screw 60 moves, as a rear roller 16 touches a stopper 13a. This makes a shutter lever 130 rotate clockwise around the shutter lever pin 17. On this occasion, a coupling pin 15b inserted into a cut and removed part 13c and the coupled section 15 move downward, and a shutter 14 moved downwards too simultaneously. After the front end surface of the inserting or drawing-out female screw 60 touches the front inner surface of the case 8a for the inserting or drawing-out female screw 60, the switch 1 moves backwards and is inserted into the draw-out device. |
