JPH1035956A - Document reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim at the solution of such a problem that when a relatively paper stiffened and thickish document is fed to a document conveyor passage, it is guided to a conveyor passage with a curved passage turned up in a U-shaped form, and conveyed after being curved and a conveying speed in the document in a conveying route is made to be variable, therefore variations are produced in reading of the document of an image reading sensor, so that there is such a fear of causing the irregularity of an image and of giving some damage to the document. SOLUTION: In a document reader 101 which is provided with a first document inserting port 30 inserting a document, a document reading means 13 reading the document, and a document conveyor passage 16-2 with a curved passage, turned up in a U-shaped form, conveying the document ranging from the document inserting port to the document reading means, it is also equipped with a second document inserting port 31 inserting the document into the document reading means, the document conveyor passage which is no need passing through the curved passage, and a document mount table mounting the document on this second document inserting port, respectively.

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 employed in an image forming apparatus such as an electrophotographic copying machine, a facsimile machine, and a scanner.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventionally known document reading apparatus.

In FIG. 3, a document reading apparatus 1 has a first
A first document insertion port 30 is provided. The first document insertion port 30 has a first
And a pickup roller 2 for contacting the uppermost one of the originals placed on the original placing table 14 and feeding the original in the original transport direction.

On the downstream side of the pickup roller 2, there are provided a first pair of transport rollers 3, 4 including a feed roller 3 and a reverse roller 4 for separating the originals on the mounting table one by one and feeding them to a transport path. Are located. First transport roller pair 3,
The first pressure roller 5 and the first pressure roller 5
The second pair of transport rollers 5 and 6 are provided. A first guide plate 21 that forms a document conveyance path 16-1 is provided between the first conveyance roller pairs 3, 4 and the second conveyance roller pairs 5, 6.

On the downstream side of the second pair of conveying rollers 5 and 6 in the document conveying direction, there are provided third pair of conveying rollers 7 and 8 including a second pressure roller 8 and a second conveying roller 7. The pair of second conveying rollers 5 and 6 and the third pair of conveying rollers 7 and 8 are curved in a U-shape to form a conveyance path 16-2 for conveying the original by turning the original back in a U-shape. Guide plate 22 is provided. On the downstream side of the document transport path of the third transport roller pairs 7 and 8, a fourth transport roller pair 9 and 10 including a third transport roller 9 and a third pressure roller 10 is provided. . An image reading sensor 13 for reading a document image is provided between the third pair of conveying rollers 7 and 8 and the fourth pair of conveying rollers 9 and 10.
The image reading passage 16-3 is formed on the upper side. On the downstream side of the fourth conveying roller pair 9, 10 in the document conveying direction,
A paper discharge roller 11 and a paper discharge roller 1 for conveying a document in a paper discharge direction.
Two paper discharge roller pairs 11 and 12 are provided.
Fourth transport roller pair 9,10 and paper discharge roller pair 11,12
A second guide plate 22 that forms the paper discharge conveyance path 16-4 is provided between the first guide plate 22 and the second guide plate 22. Discharge roller pair 11, 12
A document discharge port 40 is provided on the downstream side, and the document discharge port 40 is provided with a discharge tray 15 on which the discharged document is placed.

The original reading device 1 has a first original insertion slot 3
0 to original transport path 16-1, return transport path 16
-2, image reading passage 16-3, paper discharge conveyance passage 16-4,
A document transport path 17 up to the document discharge port 40 is formed.

Documents are transferred from the first document table 14 to the document transport path 16-1, the return transport path 16-2, the image reading path 16-3, the paper discharge transport path 16-4, and the document discharge port 4.
0, and the image reading path 1
The image is read by the image reading sensor 13 of 6-3, and the image is discharged onto the paper output mounting table 15.

In the original reading apparatus 1, since the original transport path 17 is formed in a U-shape, the apparatus can be made small.

[0009]

A conventional document reading apparatus 1
Since the document transport path 17 is formed in a U-shape,
A relatively thick and thick original is placed in the original transport path 17.
Is fed to the return conveyance path 16-2, the document is conveyed while being curved, and the conveyance speed of the document in the conveyance path becomes variable. There is a problem that the document may be disturbed or the document may be damaged.

[0010]

According to a first aspect of the present invention, there is provided a first document insertion slot for inserting a document, document reading means for reading a document, and a document being conveyed from the document insertion port to the document reading means. A document feeder having a U-shaped folded document passage having a curved passage, wherein a second document insertion opening for inserting a document into the document reading means without passing through the curved passage; A document reading apparatus has a document placement table on which a document is placed in a second document insertion slot.

According to a second aspect of the present invention, in the original reading apparatus according to the first aspect, an original set is arranged such that the original can be inserted into the original mounting table while regulating the position of the original in accordance with a reading reference of the reading apparatus. A document reading device having a width guide for the document.

According to a third aspect of the present invention, there is provided the original reading apparatus according to the second aspect, wherein the original placing table has an index for setting the original of the width guide.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG.

In FIG. 1, the same components as those of the conventional document reading apparatus shown in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted.

In the vicinity of the third pair of conveying rollers 7 and 8 of the original reading apparatus 101, a second original insertion slot 31 is provided. The second document insertion slot 31 is provided with a second document table 32 on which a document to be conveyed is placed. The nip portion of the third pair of conveyance rollers 7 and 8 is located downstream of the second document table 32 in the document conveyance direction. When the image reading sensor 13 is configured to read a document on the basis of a center, the document on the second document placing table 32 is placed on the second document placing table 32 in accordance with the center reference. A width guide mechanism 33 that regulates the position and carries the sheet is provided.
A pair of width regulating members 34 and 3 that slide in the width direction of the document
4. Further, the second document table 32 is provided with a document scale 35 for indicating the size position of each document on the width regulating members 34, 34.

When the original is placed on the second original placing table 32 in accordance with the regulation of the width regulating members 34 and 34 and inserted into the original reading apparatus 1 through the second original insertion slot 31, the original becomes the third original. The image reading passage 16-3 is held between the nip portions of the conveying roller pairs 7, 8 and rotated by the rotation of the third conveying roller pairs 7, 8.
The document information is read by the document reading sensor 13 at that position. Next, the fourth conveying roller pair 9,
10, and the rotation thereof causes the discharge conveyance path 16-
It is sent to 4. Further, a pair of paper discharge rollers 11 and 12
And is discharged onto the discharge tray 15 by the rotation of the discharge roller pairs 11 and 12.

A document is placed on a second document table 32,
The document reading sensor 1 is inserted directly into the image reading path 16-3.
3, the image information of the original is read, and
-4, the original can be conveyed to the flat conveying path of the image reading path 16-3 even if the original is strong such as thick paper, and the conveying speed of the original in the conveying path is variable. Since the document can be conveyed without any irregularities, the reading of the document by the image reading sensor does not vary, and the image is not disturbed and the document is not damaged.

Another embodiment of the present invention will be described with reference to FIG.

In FIG. 2, the same members as those of the above-described document reading apparatus are denoted by the same reference numerals, and description thereof will be described.

This embodiment relates to a document reading apparatus in which the image reading sensor 13 reads a document based on one side.

The second document insertion slot 3 of the document reading device 101
1 is provided with a second document table 132 on which a single-sided document is placed. One edge of the document table 132 serving as a reference has one edge of the width of the document guided and regulated. A fixed guide member 133 is provided. On the second document table 132, a fixed guide member 133 is provided with a slidable regulating member 134 parallel to the width direction. An index 135 for regulating the width of each document in the slide regulating member 134 is provided on the second document placing table 133.

Second, if the original is placed on the original placing table 32 and transported, the original can be inserted on the basis of one side, and the image reading sensor 13 can read the image information.

[0023]

According to the first aspect of the present invention, there is provided a second document insertion port for directly inserting a document into the image reading means in the document conveyance path of the document reading apparatus, and the second document insertion port. The original placement table on which the original is placed is provided, so that the original can be transported to a flat transport path. As a result, the reading of the image reading sensor does not vary, and the image is not disturbed or the document is not damaged. Also, it is easy to set a document.

According to the second aspect of the present invention, since the document width regulating set member is provided on the second document placing table, the document can be conveyed without skew, and the setting property of the document is improved. Can be.

According to the third aspect of the invention, since the set index of the document width regulating set member is provided on the second document table, the position of the width guide corresponding to each size of the document can be easily determined, and Setability is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a document reading apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a second document table in a document reading apparatus according to another embodiment of the present invention.

FIG. 3 is a perspective view of a conventional document reading apparatus.

[Explanation of symbols]

 13 Document Reading Means 16-2 Folded Document Conveying Path 30 First Document Insertion Port 31 Second Document Insertion Port 32, 132 Document Placement Base 34, 134 Width Guide 35, 135 for Width Guide 35, 135 Index 101 Document reading device

Claims (3)

[Claims] A first document insertion port for inserting a document, document reading means for reading the document, and a U-shaped bent passage for conveying the document from the document insertion port to the document reading means. A second document insertion port for inserting a document into the document reading means without passing through the curved path, and placing a document in the second document insertion port. A document reading device having a document mounting table. 2. A document setting device according to claim 1, wherein said document setting guide sets said document on said document placing table so that said document can be inserted by regulating the position of said document in accordance with a reading reference of said reading device. A document reading device, comprising: 3. The original reading apparatus according to claim 2, wherein said original placing table has an index for setting the original of said width guide.