| 摘要 |
A rotation-ring barker comprises a stator (7) and a rotor (8) which is mounted so as to be rotatable in relation to the stator and which has an opening (4) for a log to pass through. A number of pivotable processing tools (2) are connected to the rotor and are each arranged on a shaft (14) which is rotatably mounted in the rotor and acted upon by a spring means (23) striving to keep the tool (2) yieldably applied against a log passing through the rotor opening. Connected to the stator (7) are one or more hydraulic cylinders (15) serving to axially displace a ring (17) which accompanies the rotor and which, via a transmission link (28), is connected to a stop means mounted so as to be rotatable in relation to the tool shaft (14) and adapted to cooperate with a support member non-rotatably connected to the tool shaft, more precisely in such a manner that the stop means, on the one hand, by rotating in one direction about its axis, positively entrains the support member while pivoting the tool (2) out and away from the rotor centre against the action of the associated spring means to a desired, optional stop position and, on the other hand, by rotating in the opposite direction away from this stop position, can, when the tool is applied against a log, let go of the support member to allow the spring means to keep the tool applied against the log. |
