JPS5999867A - Reader of original picture - Google Patents

Abstract

PURPOSE:To attain high reliability of the reader by inverting a picture reader to simplify the shape of a carrying path of a sheet original, allowing to read surely the picture on both sides of the original. CONSTITUTION:The sheet original P' is pressed to an exposure plate 9 by a prescribed pressure, the picture reader 20 is moved in the arrow A and one side of the original P' is read. Further, the reader 20 inverts the reading section and is at standby to read the other side of the original. A sheet original holding and carrying device holding the original P' finished for the reading carries the sheet original held to a picture reading section (b) by a driver 31 to a position possible for transmission. The original received between a carrying belt 4' and the exposure plate 9' is carried to the position reading the other side while keeping pressing, detected similarly the same as the picture reading section (a) and stopped, the reader 20 is moved in the arrow A' and the rest side of the original is read.

Description

[Detailed Description of the Invention] Technical Field> The present invention relates to a device for reading double-sided images of a sheet original, and in particular to a sheet original used for reliably reversing the front and back sides of a sheet original in a copying machine, an electronic file, a facsimile machine, etc. double-sided image reading device (related to this).

<Prior Art> Conventionally, when reading images on both sides of a sheet original, it was often done manually, which was very disadvantageous in terms of time. Therefore, it is necessary to automatically flip the front and back of the sheet document (some devices are provided, and in all of those devices, the paperback is reversed).The conveyance path for reversing the document is complicated. There are disadvantages such as the possibility of damage to the paper, or the possibility of feeding errors caused by these.

<Object of the Invention> In view of the above-mentioned matters, the present invention makes the transport path of the sheet original very simple by reversing the image reading device, thereby ensuring that the sheet original is not soiled or damaged. To provide a small and highly reliable double-sided image reading device capable of reading double-sided images of a sheet original.

<Example> The structure of the present invention will be described in detail by referring to an embodiment.

FIG. 1 shows a double-sided image reading device according to an embodiment of the present invention.

In FIG. 1, / is a plywood board for stacking sheet originals P, ) is a pick-up-a-knob roller for feeding sheet originals stacked on the base plate one by one, 3 indicates a paper guide. Also, Ri.

IJJ, 5' is a conveyor belt for conveying sheet originals and crimping exposure plates 5', 5'''\.
It is passed on to each of them. This conveyor bell (・ri, l/'
and the exposure plate 2.2', there is an image reading device for reading the image of the sheet original, 20 is inverted and arrows A and A' are arranged.
It is provided so that it can reciprocate in the direction. Further, M receives the sheet original P' which has been read on one side by the first image reading unit a, and sends out the original to the first image reading unit 1] in order to read the remaining one side. A pair of pulleys indicated by /7 (a conveyor belt and a paper guide /♂
It consists of one drive/auxiliary device J'/l and is rotated in the direction of arrow E. Also, 10. // means the first image reading unit [) has finished reading 1~.
- Original storage tray, paper ejection L for ejecting 2.2i sheets
1-A is shown.

The operation of the sheet/original double-sided image reading device (6) constructed as described above will now be described in detail.

At first, when you give an instruction to start reading, the 2nd paper of Saw 1 and original P loaded on the base plate / y - 1t is placed at a constant pressure. rise to the point where they touch. Fukinipi.

By the rotation of the pull-up roller, the
Only the topmost sheet of paper is sent to the first image reading section a. At this time, the conveyor belt 14, which is passed to the pulley 3 (J), rotates to receive the sheet document that has been sent out.
It is guided between the conveyor belt gear and the exposure table plate 2 made of transparent glass or the like. Then, the guided sheet document is moved to a predetermined reading position by rotation of the conveyor belt p while being held and pressurized by the conveyor belt pegs and the exposure base plate. (2) The sheet original that has reached the predetermined reading position 1. is detected by a detection means (not shown) and immediately stops (P' in the figure indicates this state). In this state, the sheet original is It has a shape in which it is pressed against the exposure table plate 2 with a constant pressure by the perforations.

Here, the image reading device 20 is located at the position indicated by the solid line in the figure.
moves in the direction of arrow A and reads one side of the sheet original P'. The sheet document, one side of which has been read in this manner, is received by the belt/15 which rotates at the same peripheral speed as the conveyor belt of the sheet document holding and transferring section M or slightly faster due to the rotation of the conveyor bell 14. taken. The original sheet taken from this receiver is stopped by a detection means (not shown) at a position where the end of the original sheet does not protrude from the conveyor belt /z and guide /♂ on the 11= side. On the other hand, after completing one-sided reading of the sheet document, the image reading device -0 reverses the reading section as shown by the dashed line in the figure, and reads the sheet document 1-0.
Take the other side of the document and wait at 7. Next, the sheet document holding/transfer device is moved from the drive device 2F/1 to the position shown by the dashed line in the figure, which is the first image reading section l).
\Move to the position where the sorted document that is being held is fed out. Then, the pulley/7Q)])1” Shukichi is in the opposite direction.
The sheet document, which was held by the rotation of the belt, is sent to the first image capture section b' I
JJ' 1 and conveyor belt DA' and exposure table plate 7
' between ＼ and uke are taken. .

Then, the sheet original taken by the receiving IJ is conveyed under pressure between the conveyor plate holder' and the exposure table plate' to a predetermined position, that is, a position where the other side is read, and the above-mentioned first image is Similarly to the reading section 21, it is detected by a detection means (not shown) and stopped. As mentioned above, the image reading device 2 is waiting at the position indicated by the dashed line in the figure.
0 moves in the direction of arrow A' and reads the remaining side of the sheet original. In this way, the sheet document whose double-sided sides have been read is sent out between the paper ejection rollers 10 and/or via the paper guide 3 by the rotation of the conveyor belt y'. Due to the rotation of //, the sheet document is discharged to the sheet document storage tray, 2.21=. At this time, the sheet document holding and transferring device M and the image reading device !θ have already been moved or reversed to the position shown by the solid line ζ in the figure. At this point, the process moves on to the operation for reading the next sheet document fed into the first image reading section a.

In addition, if the sheet original has an image on only one side, by setting the mode for single-sided reading, it is possible to read only on either the first image reading section a or the second image reading section A. Action will be taken.

FIG. 2 shows a double-sided image reading system according to another embodiment of the present invention. In this embodiment, a sheet document holding/transfer section M' transfers a sheet document after single-sided reading to a water 17. The device is configured to be moved up and down by a drive device G/ while being held in place, and other operations are exactly the same as in the example shown in FIG. Note that one component that is the same as that of the previous embodiment is given the same number.

FIG. 3 shows still another double-sided image reading device of the present invention.

In Figure 3, 1.2'1. ．． 24" indicates the conveyor belt, or the drive boo 1), 2.3..2.3'
It is passed on to each of them. And this conveyor bell l-,
! Fl...? 1), 2.5. ．． 2.5' are in contact with a constant pressure. Also 1. ．． 20 indicates an image reading device (
7. It is provided so as to be reversible as shown by arrow 11 in the figure. 3 is a paper guide and 1.27. ．． 27' is a conveyance roller that is in contact with the conveyance belts: zy, 2ti' with a constant pressure.

According to this embodiment, the sheet original sent out by the pisocouple roller 7'-e is conveyed at a constant speed by the first reading unit a, and its image is read by the image reading device -0. The second
The image is sent to the reading section. Then, the remaining surface is read by the image reading device 20ζ, which has already been inverted in the same way as the first reading section, and is conveyed to the document storage tray 2.2.

As described above, the use of this embodiment is extremely compact and convenient. Note that the same part numbers as in the above embodiment are given the same numbers as 7.

<Effects> As described in -1- below, according to the present invention, by reversing the image reading device, the conveying path of the sheet original can be made into a very simple shape, so that it is possible to prevent the sheet original from getting dirty.
It is possible to obtain a compact and highly reliable double-sided image reading device that can reliably read double-sided images of a sheet original without damaging it.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a double-sided image reading device according to an embodiment of the present invention, FIG. 2 is a schematic side view of a double-sided image reading device according to another embodiment of the present invention, and FIG. 3 is a schematic side view of a double-sided image reading device according to another embodiment of the present invention. Further, it is a schematic side view of a double-sided image reading device according to another embodiment. /... base plate, -... pick 1r tube roller, 3
...Paper guide, 1.2g/2.2Z'...conveyor belt,
S,,5',/7. ．． 2.3. ．． 2J', 2.5. ．．
2.5'... Boo Ri, 9.7', 30. ．． 30'
...Exposure plate 1, . 20... Image reading device 1 ,,! 2... Sheet document storage tray, 3/, g/...
・Drive device, 81. Δi′, M″... Sheet document holding and transporting unit.

Claims (1)

[Scope of Claims] 1. A sheet document reading section having a reversible image reading section that reads an image of a sheet document, and an exposing means and a conveying means provided facing each other with the image reading section in -I- sandwiched therebetween. and -1 of one force, the sheet original reading unit receives the sheet original and transfers the sheet original while holding it to the sheet original reading unit of the other force. The sheet document reading section on one side reads an image of one side (front surface) of the sheet document using the image reading section, and the other side -J
−, the image on the other side (back side) of the sheet original is read by the image reading unit, which is reversed in the sheet original reading unit;
FI is characterized by reading images on both sides of a sheet original.