Canon Kabushiki Kaisha

Satoshi Tsuda

Shinichi Ueda

Takahito Ueno

Kazushi Nishikata

Masato Tanabe

Koji Kawamura

Motoyasu Muramatsu

Tomoyuki Iwakoshi

Shuji Nishitani

Yoji Oya

Takashi Yano

Masato Suzuki

Takashi Kuwata

Shoichi Koyama

Yasuhiko Fuse

Joji Goto

Tomomichi Kawashima

Yoshiteru Kaida

Kazushi Nishitaka

A sheet feeding device includes a roller unit having first and second engagement units, a first engaged unit, and a pressing arm having a second engaged unit. By being rotated about the first engagement unit from a first position where the first engagement unit and the first engaged unit are engaged with each other, and the second engagement unit and the second engaged unit are not engaged with each other, the roller unit is movable to a second position at which the first engagement unit and the first engaged unit are engaged with each other, and the second engagement unit and the second engaged unit are engaged with each other. By the second engagement unit pressing the second engaged unit to move the roller unit from the first position to the second position, the second engaged unit moves to a position retracted from a second engagement unit movement locus.

Sheet feeding device

A sheet feeding device includes a driving transmission member, a feeding unit, and a switching member. The feeding unit is detachable from the sheet feeding device and includes a driven transmission member that receives a driving force from the driving transmission member, a feeding member, and a holding member that holds the driven transmission member and the feeding member. The switching member abuts the holding member and moves the feeding member between a second position and a first position lowered from the second position. When the driving force is transmitted to the driven transmission member, the feeding unit is positioned to the sheet feeding device by receiving a positioning force in an attachment direction of the feeding unit. When the driving force is not transmitted to the driven transmission member, the feeding unit is regulated by the switching member in movement in a direction opposite to the attachment direction.

Sheet feeding device and image forming apparatus

A sheet conveying apparatus may comprise a first conveying roller configured to convey a sheet and a second conveying roller disposed on a downstream side of the first conveying roller in a conveyance direction of the sheet. In a case where the second conveying roller rotates at a first speed by a driving force being transmitted to the second conveying roller, the first conveying roller rotates by being driven with respect to the second conveying roller. In a case where the second conveying roller rotates at a second speed faster than the first speed by the driving force being transmitted to the second conveying roller, the first conveying roller rotates at the second speed.

Technique for switching rotational speed of plurality of rotating members

A sheet feeding device includes a stacking member, a feeding unit, and a detachable separation unit. The feeding unit feeds sheets stacked from the stacking member. The separation unit separates the fed sheets one by one. The separation unit includes a rotating member to abut and separate from the feeding unit and to rotate, a biasing member to bias the rotating member toward the feeding unit, and an engaged member to be engaged with an engagement member included in the sheet feeding device. The engagement member can move to a first position where the engagement member is engaged with the engaged member, and a second position away from the engaged member. Where the engagement member moves from the first to the second position when the separation unit is attached to the sheet feeding device, the separation unit moves in a detachment direction using the biasing member.

A conveyance rotating body is rotatably supported by a support member. A second rotational axis at a rotation center of a driven transmission member is disposed at a position different from a position of a first rotational axis. When a feeding unit is attached to a sheet feeding apparatus, a drive transmission member and the driven transmission member engage with each other. When a driving force is transmitted from the drive transmission member to the driven transmission member, the feeding unit receives a force in an attachment direction of the feeding unit and is positioned with respect to the sheet feeding apparatus.

Sheet feeding apparatus and image forming apparatus

An image forming apparatus includes a feeding unit, a detection unit provided downstream of the feeding unit, a measurement unit that measures a measured time from the start of conveyance of a recording material to the detection of the recording material, and a determination unit that performs renewal determination for determining whether the feeding unit has been replaced with a new feeding unit. Thus, replacement of the feeding unit with a new feeding unit can automatically be detected.

Image forming apparatus

A detecting apparatus includes: a light emitting element which emits light toward a detection material; a light receiving element which receives reflected light from the detection material; and an apparatus main body having an opening/closing member which opens and closes an opening through which light emitted from the light emitting element and reflected light from the detection material pass through, the apparatus main body being capable of moving between a first position where the apparatus main body comes into contact with the detection material and a second position where the apparatus main body separates from the detection material, and the opening/closing member being configured to open when the apparatus main body moves to the first position and to close when the apparatus main body moves to the second position.

Detecting apparatus and image forming apparatus

A feeding apparatus includes a feeding member, first and second conveying members, a separation member, and drive and control units. The feeding member feeds a recording material placed on a tray. The separation member and the first conveying member form a nip portion and separates recording materials at the nip portion. The second conveying member conveys a conveyed recording material. The drive unit drives at least the feeding member. The control unit controls to feed first and second recording materials such that a second recording material front edge passes the nip portion before a first recording material rear edge passes the nip portion, and controls to stop the second recording material after the second recording material front edge has passed the nip portion such that the first recording material rear edge reaches the second conveying member before the second recording material front edge reaches the second conveying member.

Image forming apparatus and feeding apparatus

An image forming apparatus includes a feeding apparatus feeding a recording material and a protruding member that protrudes downward from an apparatus main body; wherein when the feeding apparatus is installed below the apparatus main body, the protruding member is provided in a bottom portion of the apparatus main body so that inside the feeding apparatus the protruding member does not come into contact with a movable unit which is provided in the feeding apparatus so as to be movable with respect to the feeding apparatus, and the protruding member is positioned on an outer side of a feeding path of the recording material in the feeding apparatus, and moreover the protruding member penetrates more inward than an external surface of the feeding apparatus from above the feeding apparatus.

A sheet conveying device includes a third pivoting guide member located between a first pivoting guide member on a side of fixed guide members and a second pivoting guide member on a side of an opening/closing member. In a state in which an upstream conveying path and a re-conveying path are formed, the first pivoting guide member pivots toward the third pivoting guide member to expand the upstream conveying path when pushed by a sheet conveyed from the upstream conveying path, and the third pivoting guide member pivots toward the first pivoting guide member to expand the re-conveying path when pushed by a sheet conveyed from the re-conveying path.

Sheet conveying device and image forming apparatus

An image forming apparatus includes a main assembly; an door openable and closable relative to the main assembly; a flexible connecting member connecting the door with the main assembly, the connecting member being slidable at least relative to one of the main assembly and the door, wherein the connecting member slides with opening of the door relative to the main assembly; a sliding member swingably supported by the main assembly or the door and slidable relative to the connecting member which slides. When the door is opened, the connecting member contacts, while sliding, a part of the sliding member on one side with respect to a center of swing to press the sliding member, so that the other side with respect to the center of swing of the sliding member urges the connecting member to an urged portion to retard the sliding movement of the connecting member.

Growing community of inventors

Mishima, Japan

Satoshi Tsuda