JPH0998239A - Original reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the operability for placing an original by providing an original retainer sheet supported in the main body able to be contained therein so as to use the original retainer by a required length. SOLUTION: An original 3 is arranged at an optional position on a contact glass 2 and fixed by supporting an edge of the original with a finger. Furthermore, the length of an original retainer sheet 6 is adjusted to retain the original so as to cover it. Even when the finger is detached from the original at this point of time, the original is fixed to the position at first placing. The original retainer sheet 6 is made of a conductive material to prevent charging of static electricity and the positioning of the original is facilitated and the operability is improved. Furthermore, an optical reflection function like a mirror surface is provided to a face opposite to the contact glass to allow the user to easily sense an original size without closing an original pressing plate 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading apparatus most suitable for an image forming apparatus such as a copying machine, a facsimile and a scanner.

[0002]

2. Description of the Related Art Conventionally, a document reading unit used in an image forming apparatus such as a copying machine, a facsimile, a scanner has a mechanism for holding a document with a flexible transparent plate, or two documents. There is known a structure in which a base glass is provided and a structure in which a document is partially pressed by a document pressing plate.

[0003]

However, since the conventional transparent plate made of plastic is used to hold an original document, static electricity is apt to be applied to the original plate. It adheres to the plate and is not preferable in terms of operability. Further, in the case of providing the two platen glasses, the mechanism for opening and closing the platen glass is not sufficient, and there is a problem in safety such as breakage of the platen glass.
Further, in the case of partially pressing the original, since a part of the original table is raised, the pressing by the platen becomes uneven, and there is a problem that the original is raised.
The present invention has been made in view of the above problems,
A transparent plate that does not generate static electricity is used to provide a document reading apparatus that is suitable for image forming apparatuses such as copiers, facsimiles, and scanners that can hold a document safely and uniformly.

[0004]

In order to achieve the above object, the first invention of the present invention is to provide a reading unit for reading document image information, which is provided inside a document reading apparatus main body, and to place the document. An original reading device comprising: a contact glass provided on the main body; an original pressing plate that is openably and closably connected to the main body; and an original pressing sheet that is supported in the main body so as to be stored therein. A second invention is according to the first invention, and the document reading device according to claim 1, wherein the document pressing sheet is formed of a conductive member.

[0005]

According to the first aspect of the invention, since the original pressing sheet for positioning the original can be stored inside the main body of the apparatus, it can be taken out and used by the length required for pressing the original, which is excellent in operability in positioning the original. It is possible to provide an original reading device. According to the second aspect of the invention, since the document is prevented from being attracted due to the electrostatic charge of the document pressing sheet in the first aspect of the invention, it is possible to provide the document reading apparatus which is excellent in operability in positioning the document.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below. FIG.
FIG. 1 is a schematic configuration diagram of a document reading device that is an embodiment of the present invention. In the case of the flat bed type, a reading unit 8 (FIG. 2) for reading the document image information such as a CCD sensor for receiving the reflected light from the light source document surface for irradiating the document surface is built in the reading device main body 1. There is. The original 3 is placed on the original table on which the contact glass 2 on the reading apparatus main body 1 is arranged, and the image information is read by the original reading unit 8. The original pressure plate 4 has a hinge part 5 that can be opened and closed.
It is connected to the reading apparatus main body 1 via. The document pressing sheet 6 is transparent and, as will be described later, the reading device body 1
It is supported so that it can be stored inside. The operation unit 8 is for operating the document reading apparatus and the image forming apparatus.

In the above structure, the original 3 is placed at an arbitrary position on the contact glass 2, and the end of the original 3 is pressed with a finger to be fixed. Further, the length of the document pressing sheet 6 is adjusted, and the document 3 is pressed so as to cover it. At this point, even if the finger is separated from the original, it is fixed at the position originally placed. Further, after the document pressing sheet 6 is completely placed on the contact glass, the document position is visually confirmed and corrected.
If there is any change, the same work is repeated again to position the document. After the position of the original is determined, the original pressure plate 4 is closed and the operation button on the operation unit 7 is pressed to perform copying or original reading operation.

In a preferred embodiment of the document pressing sheet 6, the member is made of a conductive material,
It is possible to provide a device that prevents electrostatic charging, facilitates document positioning, and has good operability.

As another preferred embodiment of the document pressing sheet 6, the surface of the member facing the contact glass is provided with a light reflecting function such as a mirror surface so that the document pressing plate 4 does not need to be closed. The document size can be easily detected.

As another preferred embodiment of the document pressing sheet 6, a transparent red light impermeable filter is used as the member to erase the portion marked with a red stamp or a red pen on the document. Image data can be obtained.

The document pressing sheet 6 is supported so as to be stored inside the reading apparatus main body 1. An embodiment of this storage mechanism is shown in FIGS. In FIG. 2, the reading device body 1
Since the document reading unit 8 is provided inside the housing 9 and the contact glass 2, the guide rail 10 capable of accommodating the document pressing sheet 6 is provided below the document reading unit 8.
Is provided. FIG. 3 shows an example in which the original pressing sheet 6 is stored in a retractable manner. The original pressing sheet 6 is automatically wound into the reading apparatus main body 1 by using a mechanism such as a mainspring, and is pulled out when the sheet is used. To press the document. It is also preferable in operation to fix the contact glass 2 so as to cover the contact glass 2 with a hook or the like provided at the end of the sheet if necessary.

[0012]

As described above, according to the first invention,
Since the document pressing sheet for positioning the document can be stored inside the apparatus main body, it can be taken out and used for the length required for pressing the document, so that it is possible to provide the document reading device having excellent operability in positioning the document. According to the second aspect of the invention, since the document is prevented from being attracted due to the electrostatic charge of the document pressing sheet in the first aspect of the invention, it is possible to provide the document reading apparatus which is excellent in operability in positioning the document.

[0013]

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a document reading apparatus of the present invention.

FIG. 2 is a diagram of a document pressing sheet storage portion of the document reading apparatus shown in FIG.

FIG. 3 is a diagram of another embodiment of the document pressing sheet storage portion of the document reading device.

[Explanation of symbols]

1. Document reader 2. Contact glass 4. Original press plate 6. Document holding sheet 8. Document reading unit 10. Guide rail

Claims (2)

[Claims] 1. A reading unit provided inside the main body for reading original image information, a contact glass provided on the main body for placing an original, an original pressing plate connected to the main body for opening and closing, and a main body. An original reading device having an original pressing sheet supported so as to be stored inside. 2. The document reading device according to claim 1, wherein the document pressing sheet is formed of a conductive member.