JPH0524634U - Paper feeding device of image forming apparatus - Google Patents

Abstract

(57) [Summary] [Purpose] There is no fear that the transfer paper stored in the large-capacity tray will be folded, and the operation of storing the transfer paper in the large-capacity tray can be performed smoothly. A paper device is provided. [Structure] A roller 20 as a transfer paper support member is rotatably attached to a column 3a of the side fence 3. The roller 20 is in a state where the large-capacity tray 1 is lowered most,
It is attached to a position slightly protruding above the opening 1a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sheet feeding device of an image forming apparatus such as a copying machine, a printer, and a facsimile.

[0002]

[Prior Art]

 FIG. 5 shows a paper feed tray portion of a paper feed device equipped in the copying machine. This paper feeder is equipped with a so-called large capacity tray. Large capacity trays contain more transfer paper than commonly used trays. Reference numeral 1 denotes a large-capacity tray. The large-capacity tray 1 is supported by a frame 10 so as to be vertically movable, and can be vertically moved by a device (not shown). The large capacity tray 1 is formed with six openings 1a.

Reference numeral 3 indicates a pair of side fences, and three columns 3 a of the side fence 3 are inserted into the opening 1 a with a gap. The side fences 3 operate in a direction toward each other and a direction away from each other in the opening 1a according to the size of the transfer paper. A holding member 4 for holding the curl of the transfer paper is provided at the tip of the upper member 3b of the side fence 3. A front fence 7 is provided at the tip of the large capacity tray 1.

As shown in FIG. 6, in this paper feeding device, the large-capacity tray 1 is moved down to the lowermost position, and in this state, the bundle of transfer sheets S is positioned on the large-capacity tray 1 at a position indicated by a chain line. Then, the bundle of transfer sheets S is slid in the direction indicated by the arrow so that the front end of the bundle of transfer sheets S is brought into contact with the front fence 7, and the bundle of transfer sheets S is set at a predetermined position. Then, when the large-capacity tray 1 is raised, the uppermost transfer sheet S is stopped at a proper position.

[0005]

[Problems to be solved by the device]

 However, in the above-described conventional paper feeding device, since the large-capacity tray 1 has the opening 1a formed therein, when a stack of transfer sheets S is slid on the large-capacity tray 1, the transfer is performed as shown in FIG. The transfer paper S located at the bottom of the stack of paper S may enter the opening 1a, which may cause so-called folding of the transfer paper. Further, if the transfer paper S is difficult to slide on the large capacity tray 1 or if the transfer paper S enters the opening 1a, it is difficult to store the transfer paper S in the large capacity tray 1. is there.

The present invention has been made in view of the above conventional problems, and there is no fear that the transfer paper stored in the large-capacity tray will be folded, and the transfer paper is stored in the large-capacity tray. An object of the present invention is to provide a sheet feeding device of an image forming apparatus that can perform work smoothly.

[0007]

[Means for Solving the Problems]

 According to a first aspect of the present invention, a large-capacity tray, which has an opening and on which a transfer paper is installed on an installation surface on which the opening is formed, and an opening of the large-capacity tray are inserted with a gap therebetween. A sheet feeding device having a fence, wherein the transfer sheet is slid on an installation surface having an opening, and the transfer sheet is set at a predetermined position. A paper feeding device of an image forming apparatus, comprising a transfer paper support member for preventing the leading end of the transfer paper from entering the opening when the transfer paper slides on the surface.

[0008]

[Action]

 Since the present invention is configured as described above, when the transfer paper is set at a predetermined position by sliding the transfer paper on the installation surface where the opening is formed, the tip of the transfer paper is set on the transfer paper support member. It is supported and prevents the leading edge of the transfer paper from entering the opening.

[0009]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. The sheet feeding device according to the embodiment of the present invention is installed in a copying machine like the sheet feeding device according to the conventional example, and has the same structure as that of the conventional device. The same reference numerals as those in the conventional example are attached to those and description thereof is omitted.

The first embodiment will be described. As shown in FIGS. 1 and 2, a roller 20 as a transfer paper support member is rotatably attached to the column 3a of the side fence 3. The roller 20 is attached to a position slightly protruding above the opening 1a when the large capacity tray 1 is in the lowest position. That is, the end portion of the inclined member 30 on the front fence 7 side slightly protrudes from the installation surface of the transfer paper S of the large capacity tray 1.

Next, an operation of accommodating the transfer sheet S in the large capacity tray 1 of the sheet feeding device according to the first embodiment will be described. A bundle of transfer sheets S is set on the large-capacity tray 1, and the transfer sheets S are slid in the direction indicated by the arrow in FIG. At this time, the front end of the transfer paper S is supported on the roller 20, and the stack of the transfer paper S advances while rotating the roller 20. Therefore, the transfer sheet S does not enter the opening 1a, and so-called edge folding of the transfer sheet does not occur.

Further, the stack of the transfer paper S is supported by the rollers 20, does not enter the opening 1 a, and slides on the large capacity tray 1 while rotating the rollers 20, so that The frictional force with the tray 1 is reduced, and the stack of transfer sheets S can be smoothly advanced to a predetermined position.

The bundle of transfer sheets S is slid in the direction shown by the arrow so that the front end of the bundle of transfer sheets S is brought into contact with the front fence 7, and the bundle of transfer sheets S is set at a predetermined position. Then, when the large-capacity tray 1 is raised, the large-capacity tray 1 is stopped with the uppermost transfer sheet S in an appropriate position. Since the rollers 20 are attached to the columns 3a, when the large-capacity tray 1 is lifted, the transfer paper S and the rollers 20 are no longer in contact with each other, and the stack of the transfer paper S is placed flat on the large-capacity tray 1. It Therefore, there is no problem in accommodating the transfer paper S in the large capacity tray 1.

A second embodiment is shown in FIGS. 3 and 4. In the figure, reference numeral 30 indicates an inclined member as a transfer paper supporting member, and this inclined member 30 is fixed to the support column 3a by screwing. The tilting member 30 is tilted upward as it goes toward the front fence 7, and the end of the tilting member 30 on the front fence 7 side slightly projects from the opening 1a. That is, the end portion of the inclined member 30 on the front fence 7 side is in a state of slightly protruding from the installation surface of the transfer paper S of the large capacity tray 1.

In the sheet feeding device according to the second embodiment, as in the sheet feeding device according to the above-described embodiment, a stack of transfer sheets S is set on the large capacity tray 1, and the transfer sheet S is moved in the direction shown by the arrow in FIG. Slide. At this time, since the front end of the transfer sheet S is supported on the roller 20, so-called folding of the transfer sheet does not occur. In addition, the transfer paper S does not enter the opening 1a, so that the work of storing the transfer paper S in the large capacity tray 1 can be performed smoothly. Although a copying machine is shown as the image forming apparatus in the above embodiment, the present invention is not limited to this and can be applied to a printer and a facsimile.

[0016]

[Effect of the device]

 As described above, according to the present invention, there is no fear that the transfer paper stored in the large-capacity tray will be folded, and the work for storing the transfer paper in the large-capacity tray can be performed smoothly. .

[Brief description of drawings]

FIG. 1 is a perspective view of a paper feeding device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining a transfer sheet accommodating operation of the sheet feeding device according to the first embodiment of the present invention.

FIG. 3 is a perspective view of an essential part of a paper feeding device according to a second embodiment of the present invention.

FIG. 4 is a diagram for explaining a transfer sheet accommodating operation of the sheet feeding device according to the second embodiment of the present invention.

FIG. 5 is a perspective view of a sheet feeding device according to a conventional example.

FIG. 6 is a diagram for explaining a problem of the sheet feeding device according to the conventional example.

FIG. 7 is a diagram for explaining a problem of the sheet feeding device according to the conventional example.

[Explanation of symbols]

 1 Large capacity tray 1a Opening 3 Side fence 7 Front fence 20 Roller 30 Tilt member

Claims (1)

[Scope of utility model registration request] 1. A large-capacity tray having an opening and a transfer sheet placed on an installation surface on which the opening is formed, and a fence inserted through the opening of the large-capacity tray with a gap. A sheet feeding device of an image forming apparatus in which a transfer sheet is slid on an installation surface on which an opening is formed to set the transfer sheet at a predetermined position. A sheet feeding device of an image forming apparatus, comprising a transfer sheet supporting member that prevents the front end of the transfer sheet from entering the opening when the transfer sheet is slid.