JPS62196643A - Slide type platen cover - Google Patents

Abstract

PURPOSE:To set up an original correctly on a reference position even if the original is a sheet-like original or a thick original by forming a slide plate on an original cover. CONSTITUTION:The slide plate 11 can be slided in the right and left direction on the short side 10a of an original cover body 10 and the length of the slide plate 11 in the right and left direction is set up equally to the length of the original cover body 10 in the right and left direction. Thereby, the platen cover 1 can obtain a normal square shape by making the right end part of the slide plate 11 coincide with that of the body 10. When the slide plate 11 is slided from said status in the right direction, an aperture part which is not covered with the platen cover is formed on the front left side of the cover 1, so that a thick original can be copied by setting up the thick original on the aperture part. Thus, the operator can complete the setting of the original only by matching the right end part of the thick original with the left end part of the slide plate 11.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a document cover used in an image forming apparatus such as an electrophotographic copying machine.

<Prior Art and Its Disadvantages> This type of document cover is generally supported at the rear end of the image forming apparatus, and can be opened and closed on the document table. However, with such a document cover, when placing a thick document such as a book on the document table, the document cover is supported at one point such as the rear end of the image forming device.
When the document cover is closed, the force applied to the document through the document cover is not uniform, which causes the document to be tilted. Therefore, in such cases, image formation is performed with the document cover open.
It is very difficult to align the original with the reference position compared to a sheet-like original. That is, the conventional document cover has a drawback that even when the document cover is open, if the document is thick, it is difficult to align the document with the correct reference position due to the thickness.

<Object of the Invention> The object of the present invention is to solve the above-mentioned drawbacks by providing a slide plate on the document cover, and to make it possible to correctly align a document, whether it is a sheet-like document or a thick document, to the reference position. Our goal is to provide a sliding type document cover that can be used.

<Configuration and Effects of the Invention> The present invention provides a document cover that is provided on a document table so as to be openable and closable, and includes a slide plate that is slidable relative to the document cover body and changes the size of the uncovered portion by sliding. It is characterized by having been established.

By configuring the invention as described above, when an image is to be formed on a thick original, by sliding the slide plate with the original cover body closed, the original can be formed using the edge of the slide plate as a reference. It can be placed on the manuscript table. In other words, depending on the thickness of the slide plate, the edge of the thick document can be held down by the edge of the slide plate, so the operator can always form an image at a constant position by simply aligning the document using the edge of the slide plate as a reference line. It can be done.

For example, if you change the pages of a document and perform image formation one after another, place the document on the document table by aligning the edge of the document with the edge of the slide plate each time you change the page. You can always form an image in a fixed position just by placing it in the same place. Furthermore, there is no possibility of failure in image formation due to tilting of the document, and the operability is also very good because it is only necessary to operate the slide plate with the document cover closed.

<Embodiment> FIG. 1 is a schematic external view of a copying machine using a sliding type document cover according to an embodiment of the present invention.

FIG. 2 is a right side view of the sliding document cover.

A third sliding document cover 1 in the figure is provided on a document table 20 at the top of the copying machine main body 2. The document cover 1 is rotatably supported by a rotating shaft 30 at the rear end of the document table 20, that is, the document cover 1 is provided so as to be openable and closable with respect to the document table 20.

The document cover 1 is composed of an L-shaped document cover main body 10, and a slide plate 1) that is slidable on a short side 10a of the L-shaped document cover main body 10. The slide plate 1) has a protrusion 13 at its front and rear ends, and a guide groove 12 for guiding the protrusion 13 is provided on the short side IOa of the document cover body 10. With the above configuration, the slide plate 1) can slide in the left-right direction with respect to the short side 10a of the document cover main body 10. Slide plate 1
) is set equal to the length of the document cover main body 10 in the left-right direction. Therefore, slide plate 1)
If the right end of the original cover 1 is aligned with the right end of the original cover main body 10, the original cover 1 will have a normal rectangular shape. If the slide plate 1) is slid rightward from this state, an opening not covered by the document cover is formed on the front left side of the document cover 1, as shown in FIG. Therefore, if a thick original is set in this position, the thick original can be copied. In this case, by setting the left edge of the slide plate 1) as the reference position, the operator can complete the placement of the document by simply aligning the right edge of the thick document with the left edge of the slide plate 1). . Therefore, if you set the left end of the slide plate 1) as the reference position in advance when sliding it to the right, the right end of the thick original can be set as the reference position when placing the thick original on the document table. Slide plate 1
) to complete the setting to the reference position. In this embodiment, the width (length in the front-rear direction) of the slide plate 1) is set to the length of the long side of 85-size paper. Therefore, as shown in FIG.
When using a large size book 3, when the two-page spread is placed on the document table with the left and right sides as shown in the figure, the top side of the book 3 is placed on the front end of the long side of the document cover main body 10, that is, on the slide plate. 1), the positional relationship is such that it just hits the sliding surface 10b on which it slides. Therefore, this sliding surface t
ab becomes the reference plane of the book 3 in the front-back direction. Therefore, by aligning its right end with the left end of the slide plate 1) and its upper end with the slide surface 10b, the book II3 can be automatically placed at the correct position in the front-back and left-right directions.

As described above, according to this embodiment, if the slide plate 1) is slid in advance so that its left end is at the reference position, a thick original can be placed on the original table without opening the original cover 1. At the same time, the thick original 3 can be set at the correct position on the document table simply by aligning the right end of the thick original with the left end of the slide plate 1).

Furthermore, in this embodiment, since the width of the slide plate 1) is matched to the length of the long side of the 85-size paper, when the book 3 is used as a thick document, the upper end of the book 3 is attached to the main body 10. By aligning it with the sliding surface of the fob, you can center it in the correct position in the front and rear directions. Therefore, it is extremely easy to set a thick original on the original table, and the original can be copied in the correct position without being misaligned. Furthermore, when the thick document is a book and the page is to be changed for copying, there is no need to adjust the document to the reference position each time the page is changed and set on the document table again. That is, simply by aligning the edge of the document with the edge of the slide plate, the document is automatically set at the reference position. Therefore, even when double-page spreads are continuously copied, the copies can always be made at a fixed position without copying failure.

In this embodiment, the slide plate 1) is made to be able to slide in the left and right directions, but it may be made to slide in the front and rear directions, or a plurality of slide plates may be provided to accommodate thick originals of various sizes. Good too.

[Brief explanation of drawings]

FIG. 1 is a schematic external view of a copying machine using a sliding document cover according to an embodiment of the present invention. Further, FIG. 2 shows a right side view of the sliding type document cover. 1-Sliding original cover, 10-Manuscript cover body, 1)-Sliding plate.

Claims (1)

[Claims] (1) A document cover that is provided on the document table so as to be openable and closable, and is characterized by being provided with a slide plate that is slidable relative to the document cover body and changes the size of the uncovered portion by sliding. Type manuscript cover.