| 摘要 |
A sun wheel is centered on a sun axis between a magazine and a conveyor, a planet carrier is rotatable about the sun axis and defines a planet axis generally parallel to but offset from the sun axis, and a gripper shaft is journaled in the planet carrier at the planet axis and carries a gripper. A planet wheel carried on the gripper shaft is coupled by a toothed belt with the sun wheel. A first drive rotates the planet carrier about the sun axis and thereby rotates the gripper about the first planet axis to move the gripper through a hypocycloidal path past the magazine and the conveyor. An erecting shaft pivotal on the planet carrier carries an erecting element, and a second drive rotates the erecting shaft and its erecting element and unfolds a flattened box blank held by the gripper.
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