| 摘要 |
Device for a rotary saw blade (1) for reducing the sound level during sawing and for reducing the risk of accidents due to an improved quick stop function. On both sides of a non-sawing portion of the saw blade (1) are arranged at least one against the side place of the saw blade (1) contactable member (4, 4'), arranged to facilitate a movement in direction from/towards the saw blade (1). Said members (4, 4') are arranged with channels which are open towards the side plane of the saw blade (1), and are pressed by a pressure acting means (6, 6') in direction towards the saw blade (1). Prior to start of the rotary movement for the saw blade (1), a pneumatic and/or hydraulic medium under pressure is supplied to said channels to form a pneumatic and/or hydraulic cushion between the saw blade (1) and thereagainst contactable members (4, 4'), thereby moving same from their contact position to a separated but adjacent position to the saw blade (1) with a sound and oscillating damping pneumatic and/or hydraulic pressure influence exerted on the saw blade (1). |
