Abstract: An image forming apparatus includes a conveyance guide, a measurement unit, an opposing member, and a holding member. The conveyance guide has an opening and forms a conveyance path through which a sheet with an image formed on the sheet is conveyed. The measurement unit measures, through the opening, a color of the image on the sheet being conveyed through the conveyance path. The opposing member opposes the measurement unit at a measurement position of the measurement unit. The holding member holds the opposing member so that the opposing member is movable between a first position where the opposing member presses the sheet against the opening and a second position where the opposing member is separated from the opening as compared with the first position. The holding member includes an abutment portion that abuts against the conveyance guide in a state where the opposing member is at the first position.

Abstract: An image reading apparatus includes an image reading sensor, a transparent plate, a guiding member, a first roller pair, and a second roller pair provided upstream of the first roller pair with respect to a sheet feeding direction. The first roller pair and the second roller pair are disposed so as to nip a sheet in each of nips of the first roller pair and the second roller pair when a leading end of the sheet enters between the guiding member and the transparent plate.

Abstract: The sheet conveying apparatus according to the present invention includes: a conveyance roller which conveys a sheet; a roller support portion on which the conveyance roller is mounted; a roller engaging portion which is mounted on the conveyance roller; a support engaging portion which is mounted on the roller support portion and is engaged with the roller engaging portion; and a guide portion which is mounted on at least one of the roller engaging portion and the support engaging portion, the guide portion being configured to guide the roller engaging portion to a mounting position by rotating the roller engaging portion relative to the support engaging portion in an interlocking manner with a mounting operation in which the conveyance roller is mounted on the roller support portion.

Abstract: An image forming apparatus includes a conveyance guide, a measurement unit, an opposing member, and a holding member. The conveyance guide has an opening and forms a conveyance path through which a sheet with an image formed on the sheet is conveyed. The measurement unit measures, through the opening, a color of the image on the sheet being conveyed through the conveyance path. The opposing member opposes the measurement unit at a measurement position of the measurement unit. The holding member holds the opposing member so that the opposing member is movable between a first position where the opposing member presses the sheet against the opening and a second position where the opposing member is separated from the opening as compared with the first position. The holding member includes an abutment portion that abuts against the conveyance guide in a state where the opposing member is at the first position.

Abstract: An image reading apparatus includes an image reading sensor, a transparent plate, a guiding member, a first roller pair, and a second roller pair provided upstream of the first roller pair with respect to a sheet feeding direction. The first roller pair and the second roller pair are disposed so as to nip a sheet in each of nips of the first roller pair and the second roller pair when a leading end of the sheet enters between the guiding member and the transparent plate.

Abstract: A sheet feeding apparatus includes a sheet feeding roller including a core portion to rotatably support the feeding roller on a feeding roller shaft and a roller portion provided on an outer periphery of the core portion, with the core portion including an engaging mechanism to engage with the feeding roller shaft to restrict movement of the feeding roller in an axial direction of the feeding roller shaft. The core portion also includes a protrusion extending in the axial direction and located on an opposite side of the feeding roller shaft from the engaging mechanism. An end portion of the protrusion is positioned at downstream side of a tip portion of the feeding roller shaft in a removing direction of the feeding roller from the feeding roller shaft.

Abstract: A measuring device includes a first roller pair, a colorimetric unit, a second roller pair, a third roller pair, a motor, and a torque limiter. The third roller pair is driven at a first speed before a trailing end of the sheet with respect to a sheet feeding direction passes through the first roller pair and is driven at a second speed higher than the first speed after the trailing end of the sheet passes through the first roller pair. The first speed is set so as to be equal to the peripheral speed of the first roller pair. The second speed is set so as to be equal to a peripheral speed of the second roller pair in a state in which a slip of the torque limiter is not caused.

Abstract: An image reading apparatus connectable to an image forming apparatus includes a feeding roller pair configured to nip and feed a sheet discharged from the image forming apparatus, a contact image sensor configured to read an image on a first surface of the sheet fed by the feeding roller pair, a light-transmissive plate provided opposed to the contact image sensor and having a light-transmission property, a first roller opposing the light-transmissive plate with a gap therebetween on a side opposite from the contact image sensor with respect to the light-transmissive plat, and a second roller positioned upstream of the first roller with respect to a sheet feeding direction and opposing the light-transmissive plate with a gap therebetween on the same side as the first roller.

Abstract: An image reading apparatus includes a first roller pair forming a first nip portion, a second roller pair forming second nip portions, an image information reading unit, and a sheet detecting unit. The second roller pair includes a recessed portion formed between the second nip portions of the second roller pair with respect to a rotational axis direction. The sheet detecting unit is provided so that at least a part thereof enters the recessed portion. The first roller pair forms the first nip portion so as to nip a sheet in a region overlapping with the recessed portion with respect to the rotational axis direction and to deliver the sheet, nipped in the first nip portion, to the second nip portions.

Abstract: A sheet feeding apparatus includes a sheet stacking portion on which a sheet is stacked, and a conveyance portion to convey the sheet stacked on the sheet stacking portion. The conveyance portion includes a roller to convey the sheet and a shaft supporting the roller. The roller includes an end surface formed on a downstream end side in a detaching direction which is a direction of detaching the roller, an extension portion extending downstream in the detaching direction beyond the end surface, an engage portion formed on the extension portion and engageable with the shaft, and a grip portion extending downstream in the detaching direction beyond the end surface and disposed outside, in a radial direction orthogonal to the axial direction, from the extension portion. The grip portion includes a hole portion penetrating through in the radial direction.

Abstract: An image reading apparatus connectable to an image forming apparatus includes a feeding roller pair configured to nip and feed a sheet discharged from the image forming apparatus, a contact image sensor configured to read an image on a first surface of the sheet fed by the feeding roller pair, a light-transmissive plate provided opposed to the contact image sensor and having a light-transmission property, a first roller opposing the light-transmissive plate with a gap therebetween on a side opposite from the contact image sensor with respect to the light-transmissive plat, and a second roller positioned upstream of the first roller with respect to a sheet feeding direction and opposing the light-transmissive plate with a gap therebetween on the same side as the first roller.

Abstract: An image reading apparatus includes an image reading sensor, a transparent plate, a guiding member, a first roller pair, and a second roller pair provided upstream of the first roller pair with respect to a sheet feeding direction. The first roller pair and the second roller pair are disposed so as to nip a sheet in each of nips of the first roller pair and the second roller pair when a leading end of the sheet enters between the guiding member and the transparent plate.

Abstract: A measuring device includes a first roller pair, a colorimetric unit, a second roller pair, a third roller pair, a motor, and a torque limiter. The third roller pair is driven at a first speed before a trailing end of the sheet with respect to a sheet feeding direction passes through the first roller pair and is driven at a second speed higher than the first speed after the trailing end of the sheet passes through the first roller pair. The first speed is set so as to be equal to the peripheral speed of the first roller pair. The second speed is set so as to be equal to a peripheral speed of the second roller pair in a state in which a slip of the torque limiter is not caused.

Abstract: An image reading apparatus includes a first roller pair forming a first nip portion, a second roller pair forming second nip portions, an image information reading unit, and a sheet detecting unit. The second roller pair includes a recessed portion formed between the second nip portions of the second roller pair with respect to a rotational axis direction. The sheet detecting unit is provided so that at least a part thereof enters the recessed portion. The first roller pair forms the first nip portion so as to nip a sheet in a region overlapping with the recessed portion with respect to the rotational axis direction and to deliver the sheet, nipped in the first nip portion, to the second nip portions.

Abstract: A sheet feeding apparatus includes a drawer unit having a sheet supporting portion, a feeding roller to feed the sheet, a conveyance roller pair, and first and second conveyance guides. An abutment surface, formed integrally with the first conveyance guide, abuts against the sheet and guides the sheet toward the drawer unit. The abutment surface is inclined upstream from a downstream side in a sheet feeding direction toward a downstream side from an upstream side in a drawing direction and overlaps with the second conveyance guide when viewed in the drawing direction.

Abstract: A sheet feeding apparatus includes: a feeding roller configured to feed the sheet. The feeding roller includes a core portion which rotatably supports the feeding roller when the feeding roller is fitted to the shaft of the feeding roller, and a roller portion provided on an outer periphery of the core portion. The roller portion rotates integrally with the core portion and abuts on the sheet. The core portion includes an engaging portion that engages with the shaft to restrict a movement of the feeding roller in an axial direction when the feeding roller is fitted to the shaft. The shaft includes an engaging groove with which the engaging portion engages when the feeding roller is fitted to the shaft. The core portion includes a protrusion extending in the axial direction at an opposing position to the engaging portion when the feeding roller is fitted to the shaft.

Abstract: The sheet conveying apparatus according to the present invention includes: a conveyance roller which conveys a sheet; a roller support portion on which the conveyance roller is mounted; a roller engaging portion which is mounted on the conveyance roller; a support engaging portion which is mounted on the roller support portion and is engaged with the roller engaging portion; and a guide portion which is mounted on at least one of the roller engaging portion and the support engaging portion, the guide portion being configured to guide the roller engaging portion to a mounting position by rotating the roller engaging portion relative to the support engaging portion in an interlocking manner with a mounting operation in which the conveyance roller is mounted on the roller support portion.

Abstract: A sheet feeding apparatus, includes a sheet stacking portion on which a sheet is stacked, and a conveyance portion configured to convey the sheet stacked on the sheet stacking portion. The conveyance portion includes a roller configured to convey the sheet and a shaft supporting the roller. The roller includes an end surface formed on a downstream end side in a detaching direction which is a direction of detaching the roller, an extension portion extending downstream in the detaching direction beyond the end surface, an engage portion formed on the extension portion and engageable with the shaft, and a grip portion extending downstream in the detaching direction beyond the end surface and disposed outside, in a radial direction orthogonal to the axial direction, from the extension portion. The grip portion includes a hole portion penetrating through in the radial direction.

Abstract: A sheet feeding apparatus includes an apparatus body, a drawer portion including a sheet supporting portion, a feeding portion, a conveyance portion, a first conveyance guide and a second conveyance guide forming a conveyance path through which the sheet passes, and an abutment surface disposed downstream of a sheet conveyance area of the conveyance path in the drawing direction, overlaps with the conveyance path when viewed in the drawing direction, and configured to guide the sheet toward the drawer portion in a case where the drawer portion is drawn from the apparatus body in a state where the sheet is stuck across the drawer portion and the conveyance path, the abutment surface being inclined downward as the abutment surface extends downstream in the drawing direction, the abutment surface being inclined downward as the abutment surface extends upstream in the sheet feeding direction.

Abstract: A sheet conveying apparatus has a belt with a widthwise side portion extending in a traveling direction of the belt, the widthwise side portion including a portion defining a notch being recessed in a width direction orthogonal to the traveling direction, the notch being defined by less than an entire length, in the traveling direction, of the widthwise side portion, a contacting member arranged to be in contact with an end portion of a sheet to be conveyed, the contacting member being attached to the belt so that at least a part of the contacting member is arranged in the notch of the belt, a regulating portion configured to regulate a position of the belt in the width direction by contacting with the widthwise side portion of the belt, and a driving portion configured to drive the belt.