JPS598472A - Reader for recorder - Google Patents

Abstract

PURPOSE:To use the reading of a sheet original and a book original in common by constituting an illuminating light source comprises a reciprocating light source and a sheet original automatic feeder is formed movably between a glass surface for book original placing and a position apart from the glass surface. CONSTITUTION:A casing 1 is provided with a glass surface 2 as an original placing platen and an automatic feeder frame 3 is supported slidably with a support shaft. An exposed optical device 4 is arranged under the glass surface 2 and the device 4 is provided with a light source 5 possible for reciprocating between a stop position A to a position B of a maximum scanning distance. A photodetector is arranged on a photodetecting plane 6 formed for its image with a reflecting light from the original and the light is received with a lens 7. An original table 11 is fixed to the frame 3, a sheet original is fed with a feeding roll 12 and held tightly adhered on the surface 2 with a pressing plate 16 at the stationary reading. In case of a book original, the frame 3 is turned around the shaft and the original is placed on the surface 2 so that the end comes to the vicinity of the reading position of the sheet original. Thus, the device is used for both originals with a common light source.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reading device in a recording device such as a copying machine FAC/MM.

In the reading device of a conventional recording device, there is a part that automatically feeds a large number of sheet-shaped originals to the reading device and reads them, and a part that reads book originals such as thick books. The disadvantage was that the system was divided into separate parts, requiring a large amount of space and a large number of mechanical parts, making the equipment expensive. In the case of manually feeding the originals one by one to the reading position (C is 1, a method of reading the /-1-shaped original and the book original with a common reading device is also considered, but it is not possible to automatically feed the /- In the case of a 7-1/face-down original, it is necessary to store the original (from the i position and the storage position to the reading position -\original? supply path), so it can be easily moved to It has not been possible to configure a common reading device 1 to read both the book document and the book document using a common reading device l.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to provide a reading device that serves both as an automatic feeding and reading device for sheet-like originals and as a reading device for book originals.

The present invention achieves the above object by providing a glass surface as a document placement surface;
An automatic feeding device is movable between an operating position covering the glass surface and a standby position away from the glass surface, and depending on the type of document, continuous exposure at a fixed position and scanning exposure by reciprocating are switched. This was achieved by creating a reading device having a possible exposure optical device and reading means for reading the image produced by the exposure optical device directly or indirectly through a Marugame transducer.

Further, in the present invention, the exposure position of the sheet-like original is the same as the scanning exposure start position of the book original, and the placing surface of the tray-like original reading section and the placing surface of the book original at the time of reading are common. This was achieved by creating a reading device placed on the glass surface.

The details of the present invention will be explained in more detail with reference to the embodiments shown in the drawings.

In FIG. i
f, a glass surface 2 as a surface is provided. K/Nog 1
The automatic feeder frame 3 is swung by the support shaft (6).
・In the operating position, Q is supported on top of the casing 1 as shown by the solid line, and on standby (in the I7 position, the casing is placed on top of the casing 1 as shown by the chain line J). is maintained.

The automatic feeder frame 3 is not limited to the swinging row in the figure,
At the standby position, which is the position above the glass surface 2 and away from the glass surface 20L (limited to the position shown in the figure), you can use the appropriate movement. An optical device 4 is arranged.

The exposure optical device 4 has a light source 5, for example, a light source, which is installed in the stud reciprocating IT machine from the normal stop position A to the maximum scanning distance position B. A photoreceptor, a power receiving element CCI), etc. are arranged in a light receiving section 6 that forms an image using one light beam, and the light is received by a lens 7If-. The lens 7 and the receiving surface 6 are fixedly arranged, and the first mirror 8, the second mirror 9, and the third mirror 10I are located 7 inches from the light source 5.
The optical path force X is set from L. When moving the light source 5, V is the first
The mirror 8 moves together with the light source, and the second mirror 9 and the third mirror 0 force; The optical path length is set to be constant.

As shown in FIG. 2, a document table 11 is fixed to the automatic feeder frame 3, on which a large number of sheet documents are placed one on top of the other. A document is placed on the document table 11 so that its reading surface faces the document table 11, and in the illustrated example, faces downward.

A feed roller 2 is disposed below the document table 11, and the feed roller 2 contacts the document on the document table Jl and feeds the document by friction. Further, a pair of separation rollers 13 are arranged near the leading edge of the original on the original table 11. The separation roller 13 includes a lower roller 13a which is disposed on the lower side and rotates in a direction to feed the sheet, and an upper roller 13b which rotates in a direction to apply a returning force to the paper above the lower roller 13α. When the upper roller 13b is in direct contact with the lower roller 136, the upper roller 13b can be rotated according to the rotational force given by the lower roller 13a due to frictional force, but the lower roller 13a and the upper roller 1. 3b, if there is only one sheet, the upper roller 13111 will
is rotated by the lower roller 13a, but when there are two or more sheets, the friction between the sheets is smaller, so the upper roller 1
3b is not restrained by the lower roller 13 (IL) and uses the frictional force of the roller to force the upper sheet to return to its original position. When the upper notebook is returned, it comes in contact with only one /-1 sheet and further lowers the sheet. 11 contact with roller J3α, so lower roller J3 again.
b rotates in accordance with the rotation of the lower roller 13a, and is designed to prevent much slippage between the lower roller 33 (7) and the upper roller 13b.This serves to prevent more than one sheet from being sent out. -t together with the lower roller 13a.
and upper roller] 3b to prevent wear due to direct contact with hornworms.

[Original 1 high table] The eye draft on 1 is a star toy word (accordingly, the meeting by the feed roller 12 and the separation roller 13
By the operation of , the bottom document is sent out from the bottom document to the second page.

The fed document is fed to the reading position by the first feed roller 14.

A lower 91tl tc guide plate 15 is pressed against the first feed roller 14, and the guide plate 15 functions to guide the sheet.

The guide plate 15 is formed of a spring material, for example, as a plate spring, and by providing a separate spring, it is formed so that it can always elastically apply a pressing force to the first fin 7 and the draw moon 4.

The first feed roller j4 is driven by, for example, a steno knob motor and is intermittently rotated by a predetermined amount of rotation, so that the sheet being pressed by the first feed roller 14VC by the guide plate 15 is intermittently fed a predetermined distance.

In the reading device, the notebook moves while being guided between the glass surface 2, that is, the surface of the target glass, and the pressure plate 6, and is held in close contact with the glass surface 2 by the pressure plate 16 during stationary reading.

/-1-When reading a document, the light source 5 illuminates in a stopped state.

Initially, the sheet document is fed only by the first feed roller 14, but the sheet is fed by the guide plate 15.
Since it is pressed against the feed roller 14, it can be fed reliably in the same way as in the case a when feeding is provided by a pair of normal nig rollers. Moreover, guide plate 1
5 can be made thin, so the first feed roller 14 requires almost no space under 4, so the first feed F roller 14 can be brought close to the reading position and as close as possible to the glass surface 2, and the first feed roller 14 of the sheet can be made thin. Since the approach angle θ from the feeding position to the reading position by 14 can be made very small, it is possible to feed the sheet smoothly and accurately. In particular, by using only one feed roller, it is possible to feed the second feed roller with high precision even in the unstable section at the tip of the sheet or before it curls.

The second feed roller 17 includes a lower roller 17a and an upper roller 1.
The two rollers 7b pressed against each other are driven to rotate by a predetermined amount of rotation in synchronization with the reading operation by an intermittent drive device such as a Naris Degg motor.

Although it is possible to bring the first feed roller 14 into direct contact with the glass surface 2 through the guide plate 15, there is a risk of scratches on the glass surface (-) and buildup of glue, which may hinder the reading of book originals. Since there is a problem that the image surface may become dirty in some cases, it is desirable to avoid contact with anything other than the original on the glass surface.

Sheet originals can be automatically fed one by one and read at a predetermined reading position. On the other hand, in the case of a book document, the automatic feeding device is rotated together with the frame 3, for example around a support shaft, and moved from above the glass surface 2 to another position. At this time, the glass surface 2 is released on the casing 1 of the recording device.

For example, the end of the book document should be aligned with a reference line provided at a predetermined position between the sheet document reading position and the position of the lower roller 17α of the second foot roller 17 so that the edge is near the sheet document reading position. Place it on the glass surface 2 so that it fits.

In response to the start signal, the light source reciprocates by a distance corresponding to the size of the document or by a fixed distance, illuminates the surface of the document, and forms an image on the image forming surface 6. That is, the light source and the mirrors 8 to 10 perform the exposure scanning movement.

This makes it possible to use a common light source for both sheet originals and book originals, and because the sheet original reading position and the book original reading starting position are the same, it is possible to minimize the space required for the illumination exposure device. Further, the structure of the automatic sheet document feeding device can be made thin and compact, and excellent effects such as high feeding accuracy have been obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of the reading device according to the present invention, and FIG. 2 is a partial explanatory diagram of the main parts. 2. Glass surface 3. Automatic feeder frame 5.
...Light source 1]...Document table (notebook document placement surface) 14...1st feed roller]5...Guide plate

Claims (2)

[Claims] (1) /- In a reading device of a recording device having a device for automatically supplying sheet originals one sheet at a time, a glass surface for placing book originals, and an illumination exposure device, /-1. Sheet original placement surface at the original reading position. The glass surface for placing the book original and the glass surface for placing the book original are made of the same glass surface, and the illumination light source is configured such that the sheet original reading position is set at the book original exposure scanning start position, and the stationary illumination and the moving illumination can be switched and controlled. The sheet original C height automatic feeding device is comprised of a reciprocating light source and is formed to be movable between the book document placement glass surface and a position away from the glass surface. Recording device reading device. (2) The note document automatic feeding device includes one feed roller that sends the supplied note to the reading position on the glass surface, and a guide for guiding the note from the sheet document placement surface 7Jl to the reading position on the glass surface. 2. The recording device according to claim 1, further comprising a guide plate which is elastically pressed against the foot lawn.