FIELD: machine building.
SUBSTANCE: device for machine internal mechanism band supply and return and tension comprises first and second rollers, wherein second roller is equipped with control mechanism to move it into first combined state with first roller and movement from first state with first roller into second combined state. At that, first roller is connected with first connecting gear, while second roller is connected to second connecting gear to drive them into rotation. Second gear moves synchronously with second roller. First and second gears are rotated by means of gear transmission mechanism. Second gear enters into combined state with first gear by means of movement and exits this state.
EFFECT: invention provides simplification and higher reliability.
10 cl, 13 dwg
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