Canon Kabushiki Kaisha

Shuntaro Tezuka

Takao Nada

Hiroshi Kawaguchi

Naoyuki Maeda

Atsushi Oguni

Masanori Yamagata

An image forming apparatus includes a casing including a discharge port, an upper unit arranged above the casing, a first supporting member supporting the upper unit, and a second supporting member supporting the upper unit. The casing includes a first side plate, a second side plate, and a frame member arranged downstream of the discharge port in the sheet discharge direction. In the sheet width direction, the first side plate and the first supporting member are arranged on a first side, and the second side plate and the second supporting member are arranged on a second side opposite to the first side. The frame member includes a first surface connected to the first side plate, a second surface connected to the second side plate, a third surface connected to the first supporting member, and a fourth surface connected to the second supporting member.

Image forming apparatus

An image forming apparatus includes an apparatus main body, an image bearing member unit, a transfer member, a supporting member, and a positioning member. The image bearing member unit and the transfer member are disposed attachable to and detachable from the apparatus main body. The supporting member includes a to-be-contacted portion configured to be in contact with a to-contact portion of the image bearing member unit. The to-be-contacted portion is movable from a first position to a second position by an attachment operation of the image bearing member unit to the apparatus main body, where the first position is a position to be in contact with the to-contact portion, the second position is a position different from the first position, and the second position is a position at which the supporting member is supported by the positioning member and the to-be-contacted portion is out of contact with the to-contact portion.

An image forming apparatus includes a photosensitive drum and an apparatus main body, the apparatus main body includes a transfer roller exerting a transfer pressing force on the photosensitive drum, a positioning portion positioning the photosensitive drum in first and second directions by being contacted by a bearing portion holding a rotation axis of the photosensitive drum, the first direction being in a virtual plane perpendicular to the rotation axis, and the second direction being a direction intersecting the first direction, and a pressing member exerting a holding-and-pressing force pressing the bearing portion toward the positioning portion, and, in a state in which the bearing portion is in contact with the positioning portion, the holding-and-pressing force has a component force in the first direction, and the transfer pressing force has a component force in the second direction that is oriented to press the bearing portion toward the positioning portion.

An image forming apparatus includes an image bearing member, an apparatus body including a transfer member movable between a first position and a second position, an opening/closing member. The apparatus body includes a movement mechanism configured to move the transfer member in accordance with a movement of the opening/closing member. The movement mechanism includes a first movable member and a second movable member. The first movable member is configured to move a first end portion of the transfer member from the first position to the second position. The second movable member is configured to move a second end portion of the transfer member from the first position to the second position.

An image forming apparatus includes an image bearing member, a developing portion, a transfer member, a conveyance portion, a guide member disposed on the same side as the image bearing member with respect to a conveyance path, the guide member being configured to guide the sheet conveyed by the conveyance portion toward the transfer portion, a rotary member disposed to oppose the guide member and configured to be movable between a first position and a second position, and an urging portion. An urging force of the urging portion is set such that the rotary member is positioned at the first position in a case where a first sheet having a first stiffness is conveyed, and such that the rotary member is positioned at the second position by being pushed by a second sheet having a second stiffness.

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Shizuoka, Japan

Shuntaro Tezuka