Conveyed article posture adjustment device

A conveyed article posture adjustment device for a conveyor to transport, in a predetermined transport direction, a conveyed article on a placement surface from upstream to downstream in the transport direction, the device comprising:

• a first adjustment device;
• a second adjustment device;
• and
• a controller, and
• wherein:
• the first adjustment device comprises:
• a first arm located above the placement surface and on a left to a transportation center line in a width direction perpendicular to the transport direction as viewed in a vertical direction, the left in the width direction is a left as viewed downstream in the transport direction, the transportation center line is an imaginary line passing through a center portion of the placement surface in the width direction and extending in the transport direction,
• a first swing unit configured to swing the first arm about a first swing axis extending in the vertical direction, and
• a first adjuster supported by the first arm to apply a force to the conveyed article in contact with the first arm,
• the second adjustment device comprises:
• a second arm located above the placement surface and on a right to the transportation center line in the width direction, the right in the width direction is a right as viewed downstream in the transport direction,
• a second swing unit configured to swing the second arm about a second swing axis extending in the vertical direction, and
• a second adjuster supported by the second arm to apply a force to the conveyed article in contact with the second arm,
• the controller is configured to perform first control to rotate the conveyed article clockwise in a plan view and perform second control to rotate the conveyed article counterclockwise in a plan view,
• in the first control, the controller being configured to control a swing angle of the first arm to cause the first arm to come in contact with the conveyed article, control a swing angle of the second arm to cause the second arm to come in contact with the conveyed article, control the first adjuster to apply an acceleration force to the conveyed article, and control the second adjuster to apply a deceleration force to the conveyed article,
• in the second control, the controller is configured to control the swing angle of the first arm to cause the first arm to come in contact with the conveyed article, control the swing angle of the second arm to cause the second arm to come in contact with the conveyed article, control the first adjuster to apply a deceleration force to the conveyed article, and control the second adjuster to apply an acceleration force to the conveyed article.