Device located on scrap shears or similar for reducing the frictional forces that occur as a result of the action of the material to be crushed on the closing motion

摘要

The invention relates to scrap shears ( 1 ) comprising several jaw arms ( 2 a, 2 b, 3 ), which can execute a pivoting motion in relation to one another in a closing or opening direction of the scrap shears. At least one jaw arm is equipped with a counter-bearing element ( 12 ) on the end section lying opposite the mounting ( 4 ), said element being displaced, (at least temporarily), in relation to the jaw arm carrying said element between a working position and a reduced friction position. The counter-bearing ( 12 ) is configured in such a way that the distance between its external surface ( 12 b), which faces away from the carrying jaw arm and the mating surface ( 3 b) of the neighbouring jaw arm ( 3 ), which faces towards said external surface, increases with the relative displacement of the counter-bearing element towards the reduced friction position.