JPH0722677Y2 - Paper ejection mechanism of image forming apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a paper discharge mechanism of an image forming apparatus having a paper discharge tray on which recording paper is placed.

<Prior Art> Conventionally, in an image forming apparatus such as a copying machine or a facsimile, recording paper stored in a cassette, a paper deck, or the like is fed from inside or outside the apparatus body and placed on a document table. After the formed original image is formed on the recording paper, the paper is ejected from the apparatus main body to the paper ejection tray by the paper ejection roller.

In addition, if a paper jam occurs during the image forming process, the front door (not shown) and the paper ejection door that is detachably attached to the paper ejection tray can be opened and closed to remove the recording paper. There is. One end of the paper discharge door is screwed to the main body of the apparatus, and is configured to be rotatable downward together with the paper discharge tray.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional technique, since the paper discharge tray is attached to the paper discharge door, when a paper jam or the like occurs during the image forming process, the recording is performed. When the paper discharge door is rotated to remove the paper, the paper discharge tray also rotates.

Therefore, when the recording paper after recording is stacked on the paper discharge tray, the paper discharge tray may be tilted and the recording paper may drop.

Further, as described above, in order to correct the paper jam or the like without dropping the recording paper on the paper ejection tray, the recording paper on the paper ejection tray is removed in advance, and then the paper ejection door is rotated to treat the paper jam. After that, the paper discharge door must be closed again and the previously discharged recording paper must be returned to the paper discharge tray without changing the order, and then the work must be restarted, resulting in problems such as poor workability.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and provides a paper discharge mechanism of an image forming apparatus capable of keeping the inclination of the paper discharge tray with respect to the apparatus main body even when the paper discharge door is opened and closed.

<Means for Solving the Problems> Means for solving the above-mentioned problems of the conventional technology and applied to the embodiments described below are a paper discharging means for discharging the recording paper after recording, and a discharging means by the discharging means. A discharge door having a discharge tray on which the recorded recording paper is placed, a receiving member that detachably attaches the discharge tray to the discharge door, and the discharge door when the discharge door is opened and closed. And a moving member for keeping the inclination of the paper tray with respect to the apparatus main body constant.

<Operation> According to the above means, the receiving member that detachably attaches the paper discharge tray to the paper discharge door, and the moving member that keeps the inclination of the paper discharge tray relative to the apparatus main body when the paper discharge door is opened and closed. Since the and are provided, it is possible to open and close the paper discharge door without dropping the recording paper placed on the paper discharge tray.

Therefore, workability can be significantly improved.

<Embodiment> An embodiment of a paper discharge mechanism of an image forming apparatus to which the present invention is applied will be described below with reference to the drawings.

FIG. 1 is a perspective explanatory view of a paper discharge mechanism, FIGS. 2 and 3 are explanatory views showing an opening / closing operation of a paper discharge door, and FIG. 4 is an explanatory view showing a schematic configuration of an image forming apparatus to which the present invention is applied. Is.

First, a schematic structure of an image forming apparatus to which the present invention is applied will be described with reference to FIG. Reference numeral 1 denotes an automatic document feeder that conveys and places a document on a platen glass.

Reference numeral 2 denotes an optical system having a lamp for irradiating the original with light, a reflecting mirror, an array of small-diameter image-forming elements, etc., and irradiates the image carrier, which will be described later, with the reflected light.

Reference numeral 3 denotes an image forming unit having a primary charging device, an image carrier, a developing device, a transfer charging device, a cleaning device, and the like, 4 a cassette accommodating recording paper 5 to be fed, and 6 stacking and recording the recording paper 5. It is a paper deck in which the loading platform moves up and down as the paper is fed.

Reference numeral 7 is a conveying device for conveying the recording paper 5 after transfer recording from the image carrier, 8 is a fixing device for permanently fixing the image transferred onto the recording paper 5, and 9 is the recording paper 5 after image fixing. A paper discharge roller for discharging the paper, and a paper discharge tray 10 for stacking the discharged recording papers 5.

The conveyance path of the recording paper 5 in the image forming apparatus configured as described above will be described. The recording paper 5 fed from the cassette 4 or the paper deck 6 is the platen glass in the image forming unit 4. After the document image placed on the top is transferred and recorded, it is ejected from the apparatus main body to the paper ejection tray 10 by the paper ejection roller 9.

Next, the paper discharge mechanism applied to the above apparatus will be described with reference to FIG.

9 is the inside of the discharge door 11 and is attached to the apparatus main body,
A discharge roller for conveying the recording paper 5 after recording, which is driven by a driving unit (not shown).

Reference numeral 10 denotes a paper discharge tray on which the recording paper 5 after recording discharged by the paper discharge roller 9 is placed.

The paper discharge tray 10 is composed of a plastic plate or the like having an L-shaped cross section, one end of which is locked to a protrusion 11c provided on the paper discharge door 11, and a corner portion is supported by a receiving member 12 to discharge the paper discharge door. It is detachably attached to 11.

Reference numeral 11 denotes a paper discharge door attached to the discharge side of the recording paper 5 of the main body of the image forming apparatus, and is openably and closably mounted around a fulcrum 11a.

The paper discharge door 11 is provided with a handle 11b for gripping when opening and closing.

Reference numeral 12 is a receiving member which is located on both sides of the paper discharge port of the paper discharge door 11 and which supports the corner portion of the paper discharge tray 10 and is integrally connected to a moving member described later.

The receiving member 12 can move together with the moving member while supporting the paper discharge tray 10 when the paper discharge door 11 is rotated around the fulcrum 11a.

Reference numeral 13 denotes the paper discharge tray in conjunction with the opening / closing operation of the paper discharge door 11.
A moving member for maintaining a constant inclination angle of 10 with respect to the apparatus main body, and a triangular plate 13a and a rod-shaped plate 13b as fulcrums 13c.
It is configured to be rotatably connected via.

The triangular plate 13a constituting the moving member 13 is integrally connected and fixed to the receiving member 12 and is a fulcrum on the paper discharge door 11.
It is attached so that it can rotate around 13d.

Further, the rod-shaped plate 13b constituting the moving member 13 is attached to a device body (not shown) so as to be rotatable around a fulcrum 13e.

Next, the opening / closing operation of the paper discharge door 1 that constitutes the above-described paper discharge mechanism will be described with reference to FIGS. 2 and 3.

FIG. 2 is an explanatory diagram showing a state in which the paper discharge door 11 is closed to the apparatus main body.

At this time, one end of the paper discharge tray 10 is locked to the projecting portion 11c of the paper discharge door 11, and the corner portion is supported by the receiving member 12 and attached to the paper discharge door 11.

In addition, the moving member 13 is a fulcrum which is a rotation center of the discharge door 11.
11a, a fulcrum 13e that is the center of rotation of the bar plate 13b, and a triangular plate 13a
And a rod-shaped plate 13b are pivotally connected to each other, and a fulcrum 13d is pivotally connected to the triangular plate 13a and the paper discharge door 11 to form a rectangle.

Next, when the grip 11b of the paper discharge door 11 is gripped and the paper discharge door 11 is rotated in the direction of the arrow a in the figure, the distance between the fulcrums of the rectangle remains unchanged, as shown in FIG. Transforms into a parallelogram.

At this time, in the receiving member 12, the triangular plate 13a moves in the direction of the arrow b, so that the arrow c
Is pushed outward in the direction. Also, as described above, the output tray
The corner portion of 10 is supported by the receiving member 12 and one end of the paper discharge tray 10 is locked to the protruding portion 11c of the paper discharge door 11, so that one end of the paper discharge tray 10 is While being caught by the protruding portion 11c, it is united with the receiving member 12 and is pushed outward from the discharge port of the discharge door 11 in the direction of arrow c.

Therefore, the position of the paper discharge tray 10 moves, but the angle of inclination does not change, so that the paper discharge door 11 can be opened and closed without dropping the recording paper 5 discharged and stacked on the tray 10.

<Other Embodiments> Next, another embodiment of the moving member 13 in the above embodiment will be described with reference to FIGS. 5 and 6.

In the above embodiment, the moving member 13 is constituted by connecting the triangular plate 13a and the rod-shaped plate 13b, but in the present embodiment, the moving member 14 is supported by the two rod-shaped plates 14a and 14b. It is configured to be rotatably connected by 14c.

The rod-shaped plate 14a constituting the moving member 14 is attached to the paper discharge door 11 so as to be rotatable around a fulcrum 14d. A receiving member 12 is integrally attached near the fulcrum 14d of the rod-shaped plate 14a, and a projection 15 is provided on the central portion of the paper ejection port side. One end of the paper discharge tray 10 is locked to the projection 15 and is supported by the receiving member 12 at the corner portion and integrally attached to the rod-shaped plate 14a.

Further, the rod-shaped plate 14b connected to the rod-shaped plate 14a is attached to a device body (not shown) so as to be rotatable around a fulcrum 14e.

Next, the opening / closing operation of the sheet discharge door 11 will be described with reference to FIGS. 5 and 6.

First, when the paper discharge door 11 is closed to the main body of the apparatus, the rod-shaped plate 14a is positioned parallel to the side surface of the paper discharge door 11 as shown in FIG.

Next, when the grip 11b of the paper discharge door 11 is gripped and the paper discharge door 11 is rotated in the direction of the arrow a in the figure, the fulcrum 11a which is the rotation center of the paper discharge door 11, the rod-shaped plate 14a and the paper discharge door 11 are A fulcrum 14d for rotatably connecting the rods, a fulcrum 14c for rotatably connecting the rod-shaped plates 14a and 14b,
Since the distances between the fulcrums 14e that rotatably connect the rod-shaped plate 14b and the apparatus main body are constant, they are deformed as shown in FIG.

That is, the rod-shaped plate 14b constituting the moving member 14 slightly rotates in the direction of arrow a, and the rod-shaped plate 14a slightly rotates in the direction of arrow d.

Then, the paper discharge tray 10 integrally attached to the rod-shaped plate 14a is slightly tilted in the direction opposite to the rotation direction of the paper discharge door 11.

Therefore, since the inclination angle of the paper discharge tray 10 with respect to the apparatus main body is kept substantially constant, the paper discharge door 11 can be opened and closed without dropping the recording paper 5 discharged and stacked on the paper discharge tray 10.

Further, in this case, since the paper discharge tray 10 rotates in the direction opposite to the rotation direction of the paper discharge door 11 and the two come close to each other, there is an advantage that the space required for opening the paper discharge door 11 can be omitted.

<Effects of the Invention> As described above, the present invention has a receiving member for removably attaching the paper ejection tray to the paper ejection door, and a constant inclination of the paper ejection tray with respect to the apparatus main body when the paper ejection door is opened and closed. Is provided, the opening / closing operation of the paper discharge door can be performed without dropping the recording paper placed on the paper discharge tray.

Therefore, it is possible to remarkably improve the workability and shorten the processing time such as paper jam.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of a paper discharge mechanism, FIGS. 2 and 3 are explanatory views showing an opening / closing operation of a paper discharge door, and FIG. 4 is an explanatory view showing a schematic configuration of an image forming apparatus to which the present invention is applied. 5 and 6 are explanatory views of other examples. 1 is an automatic document feeder, 2 is an optical system, 3 is an image forming unit, 4 is a cassette, 5 is recording paper, 6 is a paper deck, 7 is a conveying device, 8 is a fixing device, 9 is a paper ejection roller, and 10
Is a paper ejection tray, 11 is a paper ejection door, 11a, 13c, 13d, 13e, 14c, 14d,
14e is a fulcrum, 11b is a handle, 11c is a protrusion, 12 is a receiving member, 1
3 and 14 are moving members.

Claims (1)

[Scope of utility model registration request] 1. A discharge means for discharging recording paper after recording, an openable and closable discharge door having a discharge tray on which the recording paper discharged by the discharge means is placed, and the discharge means. A receiving member for removably attaching a paper tray to the paper discharge door, and a moving member for keeping the inclination of the paper discharge tray with respect to the apparatus main body during opening / closing operation of the paper discharge door, Paper mechanism.