JPS6130998Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a document tray that receives documents discharged from an automatic document feeder for a copying machine. This is related to the document tray.

Feed the original onto the original glass of the copying machine,
An automatic document feeder that ejects the original from above the original glass after copying, and an automatic original ejector that ejects the original manually placed on the original glass after copying it from the original glass. Pressure plates equipped with are known. A document discharged from the above-mentioned apparatus is received by a document tray attached to the copying device, and is stored on the document tray.

FIG. 1 is a sectional view showing a conventionally known and most common document holder. A document receiver 1 is provided at an angle with respect to an upper cover 2 of the copying apparatus. The original is fed by the original transport belt 3 by sliding on the original placing glass 5 to the original position determined by the original stopper 4. After copying, the original stopper 4 moves to the release position, and then the original is fed to the original transport belt 3. Therefore, the paper is ejected toward the paper ejection path 6, and further ejected onto the document receiver 1 by the paper ejection roller pair 7.

In order to store the ejected originals as described above in an orderly stack on the original document receiver 1 by utilizing the inclination, it is also necessary to reliably receive the originals ejected at a relatively high speed. If so, the inclination of the document holder 1 must be set relatively large. However, if the inclination of the document receiver 1 is large, in the case of a weak document such as a thin document, the document will not be able to be received in an orderly manner because the document will break while traveling on the document receiver 1. In addition, it is difficult to cope with originals of various sizes and thicknesses, and the ejection speed of originals, with a simply inclined original document holder.

FIG. 2 is a sectional view showing another conventional document holder. This document receiver includes a fixed document receiver 8 formed in a part of the upper cover 2 of the copying device and having a relatively gentle slope, and a fixed document receiver 8 that is supported by the upper cover 2 and is extendable and retractable in the document ejection direction. Movable document tray 1 with stopper 9
Contains 0. This document receiver can receive documents of various sizes in an orderly manner if the extension length of the movable document receiver 10 is adjusted to match the size of the document. The extension length of the movable document holder must be adjusted accordingly, which complicates operations for the operator. Furthermore, due to its structure, this document holder is relatively expensive. Furthermore, in order to provide a document tray large enough to receive the largest document size that can be copied, the document tray itself must be made larger. However, there are generally few opportunities to copy the largest original size, and usually
Since documents of B5 to B4 size are most often used, installing a document tray of a size corresponding to the largest size document has the problem of unnecessarily increasing the occupied area.

The present invention can handle documents of various sizes and thicknesses and the ejection speed of documents, and can handle documents of various sizes and thicknesses.
The purpose of the present invention is to provide a simple document tray that can receive thick documents in an orderly manner.

According to the present invention, this purpose is to fix the optical system and expose it when copying a large-sized original.
When copying another document of a smaller size than the large size, in a copying machine that fixes the document and exposes it to light, the device tilts upward toward the front toward the document ejection direction to catch the document ejected from the automatic document feeder. The document tray is provided at the leading edge of the document tray. When a large-sized document is ejected, there is a non-operating position that does not interfere with the ejection of this document, and when a document of another size is ejected, there is a non-operating position for this document. A first regulating wall that is rotatable between an actuating position that regulates movement in the ejection direction and a first regulating wall that is provided in the middle part and allows the document to move freely in the ejection direction, but A second regulating wall restricts movement in the opposite direction to the ejecting direction, and the document of the other size is ejected between the first regulating wall and the second regulating wall.
This is achieved by a document holder having a pair of discharge rollers for discharging the document with an inertial force such that its rear end passes through the second regulating wall.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

3 to 5 are cross-sectional views showing the document tray according to the present invention.

Although not shown in the figure, the copying machine including the document holder shown in the figure fixes the document on the document placement glass and performs exposure scanning for documents of A4 size or smaller than B4 size. Copying is performed at a relatively high speed, and the original is ejected at a relatively high speed. On the other hand, in the case of A3-size originals, which are large-sized originals that are generally used infrequently, the optical system is fixed and the original is moved by a document feeder for scanning exposure. The speed at which documents are ejected has become relatively slow. or
Documents up to B4 size are fed horizontally, and A3 size documents are fed vertically.

The document receiver 20 according to the present invention is inclined relatively gently upward toward the front toward the document ejection direction. This angle of inclination may be on the order of 10-15°. As shown in FIGS. 3 and 4, the tip of the document holder 20 has an upright operating position and a fifth
As shown in the figure, it has a movable stopper member 21 as a first regulating wall that can be rotated between a tilted and non-operating position, and a second stopper member in the middle of the document holder 20. A step wall 22 is provided as a regulating wall. This step wall 22 freely allows the document to move in the ejection direction, but prevents the document from moving in the opposite direction. In this case, there is a gap between the step wall 22 and the movable stopper member 21. to
It is designed to accommodate A4-sized manuscripts.

For A4 and B4 size originals, which are smaller than A3 size, the movable stopper member 21 is erected as shown in Figs. 3 and 4. In the case of an A4 size document, the document is discharged onto the document tray 20 at a relatively high speed by the pair of paper discharge rollers 7, and due to inertia, the document flies over the document tray 20 and collides with the movable stopper member 21. and falls onto the document tray 20. At this time, the original is prevented from bouncing back by the stepped wall 22, and as a result, the original is neatly placed on the original document receiver 20 between the stepped wall 22 and the movable stopper member 21, as shown in FIG. They are stored in a stacked state. In the case of a B4 size document, the document is also ejected at a relatively high speed, but this document is prevented from flying out of the document receiver 20 by hitting the stopper member 21, as shown in FIG. , are stored on the document tray 20 in an orderly stacked manner. When handling A3 size originals, as shown in Figure 5, the movable stopper member 21 is
Defeat it. In the case of A3 size originals, the ejection speed of the originals is relatively slow, so even if the movable stopper member 21 is tilted down, the ejected originals will not fly out of the original tray, and the originals will be stacked neatly on the original tray 20. It is stored in a specified manner.

FIG. 6 shows yet another embodiment of the document holder according to the present invention. In the case of this embodiment, two step walls 22a, 22 are provided in the middle part of the document holder 20.
b is provided.

In this case, documents of various sizes can be received in an orderly manner.

It goes without saying that the document tray according to the present invention can also be used as a document tray of a copying machine having a pressure plate equipped with an automatic document ejection device.

[Brief explanation of drawings]

1 and 2 are cross-sectional views showing a conventional document receiver, 3 to 5 are cross-sectional views for explaining different operating states of the document receiver according to the present invention, and 6 is a cross-sectional view showing another embodiment of the present invention.
... Movable stopper member, 22... Step wall.

Claims (1)

[Claim for Utility Model Registration] In a copying machine that fixes the optical system and exposes it when copying a large size original, and fixes the original and exposes it when copying another size smaller than the large size original. , A document tray that receives documents ejected from the automatic document feeder and is tilted upward toward the front in the direction of document ejection. a first regulating wall that is rotatable between a non-operating position that does not prevent the document from being ejected and an operating position that regulates the movement of the document in the ejecting direction when a document of another size is ejected; A second restriction wall is provided in the middle part, which allows the original to move freely in the ejection direction, but restricts movement in the opposite direction to the original ejection direction. A pair of paper ejecting rollers are provided for ejecting the document of the other size between the wall and the second regulating wall with an inertial force such that the rear end thereof passes through the second regulating wall. Manuscript reception characterized by the following.