A printing apparatus includes: a main body; a cover; a pair of supporters including a movable supporter; a first urging member configured to urge the movable supporter in an approach direction; an engaging member movable between a separated position and an engaged position; and a second urging member configured to urge the engaging member toward the engaged position. When the cover is in an open state, the engaging member is located at the engaged position by an urging force of the second urging member so as to inhibit movement of the movable supporter in the approach direction. When the cover is in a closed state, the engaging member is located at the separated position against the urging force of the second urging member by contact of the cover with the engaging member so as not to inhibit the movement of the movable supporter in the approach direction.

A sheet stacking apparatus includes a sheet stacking unit on which sheets are stacked, a sheet regulating unit, and a cover member. The sheet regulating unit includes a main body having a regulating surface regulating a position of the sheet on the sheet stacking unit, and an operating portion movably supported on the main body and having an operating surface. The operating portion is movable from a first to a second position by operating the operating surface. The sheet regulating unit is locked to the sheet stacking unit when the operating portion is in the first position, and unlocked when in the second position. The cover member includes a first surface covering the operating surface and a second surface covering an upper surface of the operating portion, and covers the operating portion with at least the first surface and the second surface so that the operating portion is not visible.

A document feed device including a document tray and a document guide. The document guide has a document guide side document loader and a document guide member. The document tray includes a groove. The document guide, at an end of the document guide side document loader in the width direction, includes: a scooper, and an upstream outline portion that is formed so as to gradually approach the document guide member toward an upstream side in the conveying direction with the scooper as an apex.

A sheet stacking apparatus includes a sheet stacking unit having a stacking surface on which a sheet is stacked, a sheet regulating unit, and an opposed member. The sheet regulating unit includes a main body having a regulating surface which regulates a position of the sheet and being movable with respect to the sheet stacking unit, and an operating portion movably supported on a top of the main body and having a pressure surface. The operating portion is movable from a first position to a second position by performing a pressing operation on the pressure surface. The main body is prevented from moving when the operating portion is in the first position, and is allowed to move when the operating portion is in the second position. The opposed member is removably supported on the main body and opposed to at least a part of the pressure surface and an upper surface of the operating portion.

A sheet feeding device includes a sheet stacking base having a base surface for a sheet, a feeding member, and a pair of cursors. The pair of cursors includes first and second cursors that separate from and come close to each other along the sheet width direction, and is movable between first position and second position. The first and second cursors are separated by the maximum distance at the first position and by the minimum distance at the second position. The first cursor includes a movable base part, and a movable sub-cursor. When a narrow sheet is placed on the base surface, the sub-cursor is moved from the reference position toward the second cursor to be brought into contact with a side face of the narrow sheet to thereby position the narrow sheet.

A sheet holder includes a regulator, a rotary body, a detection target, a rotational position detector, and a biasing body. The regulator moves in directions to approach and separate from an end portion of a sheet. The rotary body has a contact portion and rotates according to movement of the regulator. The detection target is attached to the rotary body, has a contact target portion, and rotates together with the rotary body by contacting of the contact portion of the rotary body with the contact target portion of the detection target in a rotational direction of the rotary body. The rotational position detector detects a rotational position of the detection target. The biasing body applies a biasing force between the rotary body and the detection target to maintain a contact state of the contact portion of the rotary body and the contact target portion of the detection target.

A printing device includes a first support portion, a second support portion movable in a moving direction of the second support portion toward and away from the first support portion, a movable probe movably supported by a detector, and a permission mechanism. The movable range consists of a first range and a second range. The permission mechanism is configured to permit the movable probe to move in accordance with the movement of the second support portion in the separating/approaching direction relative to the first support portion in a case where the movement of the second support portion is within the first range, and is also configured to prevent the movable probe from moving irrespective of further movement of the second support portion relative to the first support portion in a case where the movement of the second support portion is within the second range.

In an example, an apparatus may include a tray guide to support print media, a plurality of side guides to adjust a dimension of the tray guide when side fastening mechanisms corresponding to each of the plurality of side guides are actuated. Where adjusting the dimension of the tray guide alters a repository area disposed within the tray to support print media of a particular size, and a plurality of side tray guide locks to prevent corresponding side guides among the plurality of side guides from adjustment.

Disclosed is a sheet conveying apparatus, including: a first guide member for restricting a movement of an end portion of a sheet in a sheet width direction; a second guide member for restricting a movement of the other end portion of the sheet in the sheet width direction; and a moving portion, wherein when one guide member of the first guide member and the second guide member is moved in the sheet width direction, the moving portion moves the other guide member in a direction opposite to a direction in which the one guide member is moved while being interlocked with a movement of the one guide member in a first area of a moving area, and allows the one guide member to be moved without being interlocked with a movement of the other guide member in a second area of the moving area.

A sheet stacking unit of the disclosure includes a sheet stacking plate, a cursor, and a detection sensor. The cursor includes an alignment part for performing widthwise alignment of a document, and a rack extending along the widthwise direction. The detection sensor is placed opposite the rack, and has a light-emitting portion and a light-receiving portion. A plurality of detection-object parts placed in the rack along the widthwise direction have optical characteristics of different reflectivities or transmissivities from one another with respect to light emitted from the light-emitting portion. The controller detects a widthwise size of the document on a basis of output values from the detection sensor which detects light reflected or transmitted by the detection-object parts.