JPH0328039Y2 - - Google Patents

Description

[Detailed Description of the Invention] (A) Field of Industrial Application The present invention relates to a paper discharge tray, and more particularly to a paper discharge tray that can be used on both sides of the tray.

(B) Prior Art Conventionally, a copy paper output tray has usually been mounted at a fixed location. Particularly in the case of a high-speed copying machine, it is necessary to accommodate a large amount of copy paper, and in this case, the paper ejection tray is mounted at a low position below the ejection roller.

(C) Problems that the invention aims to solve
When using soft special paper such as paper, second original drawing paper, rough paper, etc. as copy paper, the leading edge of the copy paper may be rolled up and ejected, or the leading edge of the copy paper may not fit properly into the output tray. There was a drawback that the paper did not advance toward the tip of the paper and was ejected in a folded state, making it difficult to eject smoothly.

In order to eliminate this drawback, it is possible to install the paper ejection tray in two locations, one directly below the ejection roller and one lower than that, but this would complicate the shape of the paper ejection tray mounting position. The disadvantage is that it is expensive.

(D) Means for Solving the Problems Therefore, the paper ejection tray according to the present invention is a paper ejection tray that stores ejection paper ejected from the ejection section of an image forming apparatus via an ejection roller. It has an engaging part that allows the paper output tray to be attached on both sides, and when the engagement part is installed in a certain mounting position, the base of the output paper placement surface is positioned at a predetermined position below the nip point of the output roller. and a top and bottom surface formed with the ejected sheet loading surface inclined at a predetermined angle; The base of the ejected paper mounting surface is located above the predetermined position, and the ejected paper mounting surface has a back bottom surface formed with an angle smaller than the predetermined angle. That is.

(E) Function When you want to make copies using regular copy paper, the top and bottom surfaces of the paper output tray are used, so the base of the paper output tray is located at a relatively low position from the output roller, making it difficult to store large amounts of copy paper. In addition, since the inclination angle is large, it is possible to accommodate copy sheets without them slipping off the paper discharge tray.

On the other hand, when using special paper with weak stiffness, turn the output tray upside down and attach it to the installation position, in which case the base of the output paper loading surface on the bottom of the back is located at a position relatively close to the output roller. Also, since the inclination angle is small, the copy paper is not ejected in a rolled up or folded state.

(F) Examples Next, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a perspective view showing the paper discharge tray 1 installed in a normal state, that is, with the front and bottom surfaces facing upward, and FIG. 2 is a sectional view thereof.

In the figure, 2 is an image forming apparatus such as a copying machine, a facsimile, a printer, etc. A pair of ejection rollers 4 and 5 are provided in the ejection section 3 of the image forming apparatus 2, and the paper on which copies or prints have been printed is ejected. It will be done. Reference numeral 1 denotes a paper ejection tray according to the present invention, which is attached at a predetermined position below ejection rollers 4 and 5 in order to receive the ejected paper. Here, the predetermined position is a notch 6 formed in the outer frame 2' of the image forming apparatus 2. It is located relatively far away and at a low location. The paper ejection tray 1 is attached to the image forming apparatus 2 by engaging the projections 7 and 8 provided at the base end with the notch 6. At present, the projection 7 of the paper ejection tray 1 is engaged with the notch 6 in order to store normal copy paper therein. The top and bottom surfaces 9 of the paper discharge tray 1 are mounted facing upward as copy paper storage surfaces. The front and bottom surface 9 is the bottom surface 2
0 and a plurality of ribs 21 formed on the bottom surface 20.
When the paper ejection tray 1 is attached to the image forming apparatus 2, its base 9a is located at a low position relatively far from the ejection rollers 4 and 5, and its inclination angle θ1 is It is set to a relatively large value. Ejection rollers 4, 5 and paper ejection tray 1
The height difference between the front and bottom surface 9 and the base 9a is, for example, 30 per minute.
When a large number of sheets are to be stocked at a copying speed of about 60 sheets, it is desirable that the inclination angle .theta.1 be around 70 mm, and the most desirable inclination angle .theta.1 is, for example, .theta.1=30.degree. The value of the inclination angle θ1 is regulated by the convex portion 10 or 11 of the paper discharge tray 1 coming into contact with the tray support portion 2'a or 2'b of the outer frame 2' of the image forming apparatus 2. Ru.

FIG. 3 is a perspective view showing a state in which the paper ejection tray 1 is attached to the image forming apparatus 2 with the back bottom surface 12 facing upward, and FIG. 4 is a sectional view thereof.

In the figure, the projection 8 provided at the base end of the paper output tray 1 engages with the notch 6 of the image forming apparatus 2, and the paper output tray 1 is installed so that the back bottom surface 12 faces upward. . The back bottom surface 12 of the paper output tray 1 is
In the embodiment shown in the figure, it is composed of a plurality of ribs 13 provided perpendicularly to the bottom surface 15. Therefore, the discharge sheet placement surface in this case is determined by the constant height and inclination angle θ2 formed by the top surfaces of the plurality of ribs 13, and the height is near the bottom of the discharge rollers 4 and 5. The inclination angle θ2 is set to a value smaller than the above-mentioned θ1. The level difference between the discharge rollers 4 and 5 and the base 12a of the back bottom surface 12 of the paper discharge tray 1 is as follows.
For OHP paper, second original drawing paper, and rough paper, for example, 25 mm is desirable, and the value of the inclination angle θ2 is preferably around θ2=5°, for example. The value of the inclination angle θ2 is such that the convex portion 14 of the paper ejection tray 1 is
It is regulated by coming into contact with the tray support portion 2'c of the outer frame body 2'.

According to the paper ejection tray formed as described above, when copying or printing on plain paper, the front and bottom surfaces 9
Attach paper output tray 1 with the side facing up. In this case, since plain paper is relatively stiff, the paper output tray 1 is placed at a position below the output rollers 4 and 5 to some extent.
Even if the base 9a of the front and bottom surfaces 9 of the paper are positioned, the copy paper is accurately stocked. Especially in the case of high-speed machines, it is necessary to copy a large amount of copy paper at one time, so if the paper is as stiff as plain paper, it will not bend, and as long as the difference is within the range where it can be ejected straight. ,
It is preferable to set the base 9a of the top and bottom surfaces 9 of the paper discharge tray 1 to the lowest possible position. Since the inclination angle θ1 of the front and bottom surface 9 is formed to be relatively large, even if the base 9a of the front and bottom surface 9 is set low, the copy paper will not slide down from the paper discharge tray 1.

In addition, when using special paper with weak stiffness such as OHP paper, second original drawing paper, or rough paper, the output tray 1 should be installed with the back bottom surface 12 facing upward. In this case, since the base 12a of the back bottom surface 12 of the paper ejection tray 1 is located relatively close to the ejection rollers 4 and 5, and its inclination angle θ2 is set small, it is difficult to use soft special paper. Even if there is a problem, it becomes possible to stock up smoothly without causing the waist to buckle.

In the above embodiment, copy paper and paper output tray 1
In order to improve the slippage between the sheets and the conveyance performance, the ejected paper mounting surfaces of the front and bottom surfaces 9 and 12 are constructed with a plurality of ribs 21 and 13, respectively, but the present invention is not limited to this. , for example, the rib 2
The front and back bottom surfaces, each of which is configured as one surface in contact with the top surfaces of 1 and 13, may be provided on both sides of the paper discharge tray.

(G) Effects of the invention According to the invention, when you want to copy or print a large amount of plain paper using a high-speed machine, by installing the paper ejection tray with its top and bottom facing upward, the base of the paper can be moved away from the ejection roller. It is located at a relatively low and distant position and can store a large amount of paper, and since the inclination angle of the ejected paper mounting surface on the front and bottom surfaces is relatively large, the ejected paper does not slip off.

On the other hand, when copying or printing on weak special paper such as OHP paper, second original drawing paper, or rough paper, the base of the output tray can be Since it is located relatively close to the ejection roller and the inclination angle of the ejected sheet mounting surface is relatively small, it is possible to stock the paper smoothly without bending the back.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the paper ejection tray according to the present invention installed with the top and bottom surfaces facing upward, Fig. 2 is a sectional view thereof, and Fig. 3 shows the paper ejection tray according to the present invention with its back and bottom facing upward. FIG. 4 is a perspective view showing the state in which the device is mounted, and FIG. 4 is a sectional view thereof. 1... paper output tray, 2... image forming device, 4,
5... Discharge roller, 9... Front and bottom surface, 9a... Base, 12... Back bottom surface, 12a... Base, 13, 2
1...Rib.

Claims (1)

[Scope of Claim for Utility Model Registration] A paper ejection tray configured to store ejected paper ejected from an ejection unit of an image forming apparatus via an ejection roller, which has an engaging portion that allows the paper ejection tray to be attached on both sides. and when the engaging portion is installed at a certain mounting position, the base of the ejected paper placement surface is located at a predetermined position below the nip point of the ejection roller, and the ejection paper placement surface is tilted at a predetermined angle. When the engaging portion is installed in the mounting position with the normal mounting state reversed, the ejected sheet mounting surface is located above the predetermined position below the ejecting roller. What is claimed is: 1. A discharge tray having a back bottom surface on which a base portion is located, and a discharge sheet placement surface that is inclined by an angle smaller than the predetermined angle.