JPS61105168A - Original reader - Google Patents

Abstract

PURPOSE:To read pictures on the face and back of a face-back serial original under the same picture quality condition by using an original feeding mechanism to return the original to the same reading section after the original is inverted. CONSTITUTION:One original is fed at one time, and when the face is read first (state of original 14b) and reading completion is detected, an original stopper 22 turns counterclockwise and retreats from the original feeding surface. From that state, a sheet belt 7 turns again and the original is fed between the sheet belt 7 and an original guide 30 and fed into the gap between the belt 7 and a feeding belt 10 for inverting by an original branching gate 13 (original 14c). An original 14c is sent out to a hopper 6 by a pressure roller 11 (original 14d). The original housed in the hopper 6 is fed to the reading position by the pressure roller 11 and the belt 7 and the back of the original is read by a reading part 3. The above operation is repeated for each piece of paper.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a stationary manuscript scraping device having an automatic manuscript feeding mechanism, and in particular, to a stationary manuscript scraping device having an automatic manuscript feeding mechanism. The present invention relates to a document reading device suitable for continuously reading documents in which the front side and the back side of the document are sequentially read.

[Background of the invention]

A conventional document reading device is shown in FIG. In the figure, an original such as a book is placed on the flat surface of the glass 21, and the optical system and image reading section 6 of the scanner are placed below it, and the optical system moves from one edge of the original to the other. A stationary document reading device that reads a document from a stationary document feeder is equipped with an automatic document feeding mechanism 32 that automatically transports and feeds a plurality of documents 14 of the same size, such as single sheets, to the reading unit. be.

In FIG. 1, the originals taken out from the original stacking section and separated are temporarily stopped at the original reading section on the glass 21 surface, read by the movement of the scanner, and then discharged to the original storage section by the conveyor belt 7. be done. Therefore, in order to continuously read originals that have image information on the front and back screens and have the front and back in that order under the same image quality conditions, the operator must feed the originals one by one using the automatic feeding mechanism. There is a drawback that the operation is time-consuming because the document must be sent or the reading operation must be performed in the document reading section.

Examples of detailed descriptions of the automatic document feeder for reading manuscripts include Japanese Patent Publication No. 53-149321;
Japanese Patent Publication No. 49-47181 and Japanese Patent Publication No. 49-90138 have a lot of power, but they relate to single-sided reading and do not recognize the problem of reading both the front and back sides of a document.

:Object of the Invention] An object of the present invention is to read the front and back sides of the stacked originals in sequence in the order of the front and back sides, and to read the front and back sides with the same image reading unit, so that the images on the front and back sides are the same. An object of the present invention is to provide an image reading device that captures images under image quality conditions.

[Summary of the invention]

The present invention makes it possible to continuously read the front and back sides using the same reading unit in order to read originals stacked in order on the front and back sides under the same image quality conditions. In the present invention, a document transport mechanism is used to return the document to the same reading section after reversing the document in order to read both sides under the same conditions.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. This document reading device includes a hopper 1 that loads documents, a separation mechanism 2 that separates documents one by one and feeds them to a conveyance system, an image reading section 3,
It is composed of a second hopper 6 for reversing the original, a transport system 4 for transporting the original, reversing it, and transporting it to the reading section again, and a stacker 5 for storing the original after being read.

The documents 14 in the hopper 10 have image data on both the front and back sides and are stacked in order. The conveyance system 4 conveys the original fed from the separation mechanism 2 to the reading unit 3, conveys the read original to a second hotlet I (6) for inversion, and transports the read original to the stacker 5. A seat belt 7, a drive roller 8, a driven roller 9 for conveyance, a conveyance belt 10 for reversing, a pressure roller 11 for carrying in and out of the second hopper, and a paper discharge pressure roller 12 for discharging paper to the stacker 5. , and a document branching gate 15.

Although not shown in this figure, each drive roller is driven by a speed controllable tanabata.

The document reading operation will be described below with reference to FIGS. 2 to 4.

In FIG. 2, the document 14 loaded on the hopper 1 is separated into one sheet by the separation mechanism 2, conveyed by the paper feed row 220, and placed in the gap between the seat belt 7 of the conveyance system 4 and the glass flat surface 21 of the image reading section 3. The original is conveyed (state of original 14'a). From this state, the original 14a is held between the seat belt 7 and the glass surface 21 by the seat belt 7.
Utilizing the difference in the coefficient of friction between the originals 4a and 4a, the original 14a that is conveyed on the glass surface 21 collides with the original stopper 22 and stops (state of the original 14b). When the original collides with the stopper 22 and stops, the seat belt 7 also stops at the same time, and the optical system 25 of the image reading unit 3 moves the original 14b to the stationary original 14b.
While moving in the length direction of the original 14b, the reflected light from the original 14b goes up to the sensor 27 via the mirrors 24, 2\Ws 26 and reads the image information on the front side of the original 14b, and the optical system passes the length of the original 14b. It stops at the position and reading ends.

When the end of reading is detected, the original stopper 22 rotates to the left and retreats from the original transport surface. When the seat belt 7 rotates again from this state, the document is conveyed through the gap between the seat belt 7 wrapped around the driven row 29 and the document guide 30.

In FIG. 3, the conveyed original is at the original branch gate 1.
3, the seat belt 7 and the conveyor bell hI for reversing
It is fed into the gap Q (state of original 14c).

The original transported by the transport belt is sent to the second hopper 6 by the pressure roller 211 (state of original 14d).
. The state and state of the document at this time is monitored by a sensor 31.

The document 146 housed in the second hopper 6 is sent out again into the gap between the seat belts 7 by the loading/unloading pressure roller 211, and is conveyed by the seat belt 7 to the document reading position in the same manner as shown in FIG. condition). Due to the above conveyance process, the back side of the original 14f faces the image reading unit 3 compared to the original 14b, and the image information on the back side is transferred by the optical system of the image reading unit 3 by the length of the original as described above. read

When the end of reading is detected, the document stopper 22 rotates to the left, and when the seat belt 7 rotates again from this state, the document passes through the gap between the seat belt 7 wrapped around the driven roller 9 and the document guide 30. The document is then conveyed to the stacker 5 side by the document branching gate 13, and is discharged to the stacker 5 by the paper discharge pressure roller 12 (state of document 14t).

As described above, by repeating the operations shown in FIGS. 2 to 4 for each sheet, it is possible to continuously read a document having image data on both sides.

〔Effect of the invention〕

According to the present invention, it is possible to feed a single original separately and read the image using the same image reading unit and the same transport system before and after reversing the original, so it is possible to read the originals stacked in order from the front side to the back side. Continuous reading can be performed under the same image quality conditions without changing the sequence. Furthermore, since the same image reading unit is used for both the front and back sides, there is an effect that the quality of the read image can be made the same.

[Brief explanation of the drawing]

FIG. 1 is a side view of a document reading device capable of continuously reading both the front and back sides according to an embodiment of the present invention, FIGS. 2 to 4 are illustrations of the operation of the document reading device, and FIG. FIG. 3 is a side view of the reading device. 1...Hopper, 2...Separation mechanism, 3...
・Image reading unit, 5...Stacker, 6...Second
Hopper, 7... Seat belt, 8... Drive roller, 9... Followed roller, 10... Conveyance belt, 11... Pressure roller for loading/unloading, 12...
Paper discharge pressure roller, 13... Branch gate, 14... Document, 21... Glass, 22... Document stopper, 23... Optical system, 24
, 25...mirror, 26...lens, 27...
- Sensor, 32... Automatic document feeding mechanism.

Claims (1)

[Claims] 1. In a document reading device consisting of a hopper for stacking documents, a separation mechanism, a document transport section, a stacker for stacking and accommodating documents, and an image reading section, a document reversing mechanism is provided between the image reading section and the document storage section. A document reading device characterized by reading the front and back sides of a document.