| 主权项 |
1. A sheet tray device that is id="REI-00012" date="20160830" removablyid="REI-00012" introduced into a main body of an image forming apparatus through an opening of the main body, so as to hold a media sheet that is to be supplied to an image forming unit of the image forming apparatus by which an image forming operation is performed on the media sheet, said sheet tray device comprising:
(a) a first tray accommodating a first size sheet as the media sheet, and having a bottom wall and opposite side walls that project upwardly from said bottom wall, such that at least said bottom wall and said opposite side walls are provided by a single piece; and (b) a second tray movably disposed on an upper side of said first tray and accommodating a second size sheet as the media sheet, the second size sheet having a size smaller than a size of the first size sheet, wherein said second tray includes (b-1) a support member which bridges between said opposite side walls of said first tray and which is movable relative to said opposite side walls, and (b-2) a supported body pivotably supported by said support member so as to open and close an upper opening of said first tray, wherein eachat least one of said opposite side walls of said first tray includes first and second rail portions that extend in a rail extending direction in which said support member is movable relative to said opposite side walls, said second rail portion being located on an upper side of said first rail portion and being spaced apart from said first rail portion, wherein said support member of said second tray includes (i) a main slide portion that is slidably held in contact with an upper surface of said first rail portion, (ii) a removal-preventing slide portion that extends through a space between said first and second rail portions so as to prevent removal of said support member of said second tray from said first tray, and (iii) a rotation-preventing slide portion that is slidably held in contact with a side surface of said first rail portion so as to prevent rotation of said support member of said second tray relative to said first tray, wherein said first and second rail portions are offset from each other in a lateral direction in which said opposite side walls of said first tray are opposed to each other, such that said first and second rail portions do not overlap with each other as seen in a vertical direction that is perpendicular to said lateral direction and said rail extending direction, wherein said support member of said second tray further includes (iv) an extending wall portion which extends from said removal-preventing slide portion, such that said first rail portion is located between said extending wall portion and said rotation-preventing slide portion in said lateral direction, wherein said rotation-preventing slide portion extends downwardly from said main slide portion, and is slidably held in contact with, as said side surface, one of opposite side surfaces of said first rail portion that is located on an inner side of the other of said opposite side surfaces in said lateral direction, wherein said removal-preventing slide portion extends outwardly from said main slide portion in said lateral direction, and wherein said extending wall portion extends downwardly from said removal-preventing slide portion, such that said extending wall portion, said removal-preventing slide portion, said main slide portion and said rotation-preventing slide portion cooperate with one another to define a generally inverted U shape in a cross-section thereof that is perpendicular to said rail extending direction. |
