Vibration insulating member fitting method, vibration insulating member fitting device, vibration insulating member, vibration insulating member recovering method, and vibration insulating member recovering device

A vibration insulating member fitting method for fitting a sheet-like vibration insulating member onto an inner wall surface of an electrophotographic photosensitive drum having a photosensitive layer on a surface of a hollow cylinder, comprising the steps of:

• positioning and wrapping said sheet-like vibration insulating member around a shaft having an air suction portion and an air exhaust portion;
• holding the sheet-like vibration insulating member onto the shaft by air suction;
• and
• inserting the shaft that sucks the sheet-like vibration insulating member by the air suction into the hollow cylinder of the photosensitive drum to exhaust air, causing the sheet-like vibration insulating member to be tightly fitted onto the inner wall surface of the photosensitive drum by a restoring force of the sheet-like vibration insulating member.

A vibration insulating member recovering method for recovering a sheet-like vibration insulating member fitted on an inner wall surface of an electrophotographic photosensitive drum having a photosensitive layer on a surface of a hollow cylinder, comprising the steps of:

• inserting a shaft having an air suction portion into the sheet-like vibration insulating member fitted on the inner wall surface of the hollow cylinder of the photosensitive drum;
• starting air suction to suck and hold the sheet-like vibration insulating member onto the shaft;
• detaching the sheet-like vibration insulating member from the inner wall surface of the hollow cylinder of the photosensitive drum;
• and
• taking the shaft out of the hollow cylinder of the photosensitive drum, with the sheet-like vibration insulating member remaining sucked and held on the shaft, to recover the sheet-like vibration insulating member.

A vibration insulating member recovering device for recovering a sheet-like vibration insulating member fitted on an inner wall surface of an electrophotographic photosensitive drum having a photosensitive layer on a surface of a hollow cylinder, comprising:

• holding means for holding the photosensitive drum;
• a shaft having an air suction portion that sucks and holds the sheet-like vibration insulating member;
• positioning means for performing positioning when the sheet-like vibration insulating member is recovered by the shaft;
• and
• air suction means for sucking air from the air suction portion provided on the shaft.

A vibration insulating member recovering device for recovering a sheet-like vibration insulating member fitted on an inner wall surface of an electrophotographic photosensitive drum having a photosensitive layer on a surface of a hollow cylinder, comprising:

• holding means for holding the photosensitive drum;
• a shaft having an air suction/exhaust portion that sucks and holds the sheet-like vibration insulating member;
• positioning means for performing positioning when the sheet-like vibration insulating member is recovered by the shaft;
• and
• air supply means for supplying air to the air suction/exhaust portion provided on the shaft,
• wherein the shaft that sucks and holds the sheet-like vibration insulating member is inserted into the hollow cylinder of the photosensitive drum, and then air is exhausted from the air suction/exhaust portion of the shaft, causing the sheet-like vibration insulating member to be tightly fitted onto the inner wall surface of the photosensitive drum by a restoring force of the sheet-like vibration insulating member.