Packaging device, wound body, core tube, method for manufacturing wound body, and wound material

A packaging device that packages an object to be packaged using a wound body, an elongated sheet-shaped packaging material being wound onto the wound body, the wound body including a recording medium that stores information, the information including a remaining amount information indicating a remaining amount of the packaging material in the wound body, wherein

• the packaging device comprises:
• a drive unit configured to generate driving force rotating the wound body;
• a conveyance unit configured to convey the packaging material unwound from the wound body along a conveyance path;
• a tension applying unit including a displacement member that is displaceable in a direction intersecting the conveyance path, a fixed position of the displacement member being set, the tension applying unit being configured to apply tension to the packaging material when the displacement member presses the packaging material;
• a fixed position sensor configured to detect that the displacement member is located at the fixed position;
• and
• a limit position sensor configured to detect that the displacement member is located at a limit position farther from the conveyance path than the fixed position,
• during a fixed position return operation of the displacement member after the wound body is mounted on the packaging device, the packaging device reads the remaining amount information stored in the recording medium of the wound body, sets a rotation speed of the wound body based on the read remaining amount information, and then drives the drive unit so as to rotate the wound body at the rotation speed set to move the displacement member to the fixed position,
• in the case the fixed position sensor does not detect the displacement member when the fixed position return operation is started, the packaging device unwinds the packaging material from the wound body until either the fixed position sensor or the limit position sensor detects the displacement member, and then, if the fixed position sensor detects the displacement member, the fixed position return operation of the displacement member is ended, and, if the limit position sensor detects the displacement member, the packaging device winds the packaging material onto the wound body until the fixed position sensor that detects the displacement member no longer detects the displacement member and then unwinds the packaging material from the wound body until the fixed position sensor detects the displacement member, and then the fixed position return operation of the displacement member is ended, and
• in the case the fixed position sensor detects the displacement member when the fixed position return operation is started, the packaging device winds the packaging material onto the wound body until the fixed position sensor no longer detects the displacement member and then unwinds the packaging material from the wound body until the fixed position sensor detects the displacement member, and then the fixed position return operation of the displacement member is ended.