JPH08102827A - Picture reader - Google Patents

Abstract

PURPOSE: To provide a picture reader which can easily read a picture by means of directly moving a rolled film with a large number of frames and to easily set the film in a prescribed position. CONSTITUTION: LED illuminating the film 100 and a CCD sensor 11 are fixed to prescribed positions. A scanner 4 reading the film picture while moving the film 100 is provided with an original stand 1 where an indication part showing a read position is formed, a pressing board 18 pressing the film 100 on the original stand 1, a film insertion port 5 into which the film 100 is inserted, a film moving/driving wheel 13 moving the film 100, a film pressing wheel 14, a film moving guide 2 and a film discharge port 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus which illuminates a document and reads an image of the document. In particular, the present invention relates to an image reading device that fixes an illumination system and photoelectric conversion means and moves an original by a roller to read an image of the original.

[0002]

2. Description of the Related Art As disclosed in JP-A-3-145883 and JP-A-5-244349, a conventional image reading device for reading a photographic film includes an illumination system and a storage type photoelectric conversion means (CCD). The sensor is fixed and the film original is moved. The image reading device disclosed in these publications uses either a method of moving a slide film mount for reading, or a method of putting the film in a film holder containing six strips of film and moving the film holder for reading. I was reading the image on the film.

[0003]

Therefore, the image reading device disclosed in the above publication cannot read the image of a roll-shaped film having a large number of frames. Therefore, it is necessary to prepare a film mount for each frame or cut the roll film into strip films for every six frames. Further, since the optical system and the photoelectric conversion means are fixed at fixed positions, even if a roll-shaped film is inserted into the image reading device and the reading is started in order,
Depending on how the film is inserted, the images extending over the first frame and the second frame are read and it is not possible to obtain an image for each frame.

Therefore, an object of the present invention is to provide an image reading apparatus capable of directly moving a roll-shaped film having a large number of frames and reading an image on the film.

[0005]

SUMMARY OF THE INVENTION An image reading apparatus of the present invention comprises a document table (1) on which a document is placed and an indicating portion for indicating the reading start position of the document is formed, and an opening for visually observing the document. Is formed, a pressing member (18) for pressing the original on the original table, an entrance opening (5) into which the original placed on the original table is inserted, and a pair of rollers (13) that sandwich the original and move the original. , 14), a first guide member (2) for feeding formed so as to support both sides of the document from the entrance opening to the vicinity of the roller, the exit opening (6) for discharging the document, and from the vicinity of the roller. It has a second guide member (2) for feeding formed so as to support both sides of the document up to the exit opening.

[0006]

In order to solve the above problems, according to the present invention,
Even when the original is curled (circular arc), it can be pressed by the pressing plate when placing the original on the platen and setting the original on the instruction section for determining the reading start position of the predetermined frame. Can be accurately set on the indicator.

Further, since the pressing member can be removed, it is possible to set the original on the original table after removing it when setting the original, and then attach the pressing member to set the original on the instruction section. can do. Further, since the pressing plate can be erected vertically from a state in which the pressing plate is tilted sideways, the pressing plate serves as a document feed stopper. Therefore, it is possible to prevent the original from being scratched by coming into contact with the image reading apparatus main body while being curled (arcuate).

[0008]

Embodiments of the scanner of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a scanner for reading image information from a roll of photographic film on a personal computer using the scanner of the present invention. Photographic film 1
The film entrance guide 1 on which 00 is placed is the scanner body 4
It is attached to the film insertion port 5 of. The film outlet guide 3 for storing the photographic film 100 is attached to the film outlet of the scanner body 4. The scanner body 4 is connected to the personal computer 7 via a connector cable 16. The scanner body 4 is driven by operating a keyboard or a mouse (not shown) connected to the personal computer 7.

The photographic film 100 placed on the film entrance guide 1 is discharged from the film discharge opening 6 through the film insertion opening 5, the film moving guide 2, and the film exit guide 3 by the rotation of a roller described later. Will be done. The film moving guide 2 is divided into two parts from the film insertion port 5 to the position where the driving roller 13 and the pressing roller 14 are located and from the position where the driving roller 13 and the pressing roller 14 are located to the film discharge port 6.

The stepping motor 12 is controlled by an electric control board 15. The film 100 is sandwiched between the driving roller 13 and the pressing roller 14 and moved by the rotation of the stepping motor 12. The driving roller 13 and the pressing roller 14 together press the perforation portion 103 (FIG. 2) on both sides of the film 100.
It is composed of one roller and a shaft connecting the two rollers (FIG. 4A). Further, the driving roller 13 and the pressing roller 14 are constituted by rubber rollers whose surfaces are processed with fluorine so that the film does not get caught in the rollers and become entangled.

When the film is moved from the personal computer 7 to the designated frame, the three-color LED 10, which is a light source for illumination, sequentially irradiates the film 100 with RGB light. Then, the transmitted light of the film 100 is photoelectrically converted by the CCD sensor 11 (for example, 2500 pixels) in which pixels are arranged in a one-dimensional direction (main scanning direction). The photoelectrically converted image signal is stored in a frame memory through a sample hold circuit, an amplifier circuit, an A / D circuit and the like (not shown). In the moving distance (sub scanning direction) of the film 100, one pulse of the stepping motor 12 corresponds to one pixel of the CCD 11. Therefore, when one pulse is applied to the motor 12, the moving drive roller 13 rotates and the photographic film 100 moves. Is moved by one line. Then, the LED 10 sequentially emits RGB light. For example, if 4000 pulses are applied to the motor 12, 4000 × 250
Two-dimensional color image information of 0 pixels can be obtained.
The two-dimensional color image signal stored in the frame memory is transferred to the personal computer 7 via the electric control board 15 and the connector cable 16 and stored in the personal computer 7.

FIG. 2 shows a situation in which the scanner 4 of the present invention and the entrance guide 1 are mounted and the film is fed in the direction of the arrow. The leading end of the roll-shaped film 100 is inserted from the entrance guide 1 to the roller position 23 through the insertion opening of the scanner 4. The roller position 23 is a position where the driving roller 13 and the pressing roller 14 are in contact with each other. When the roller upper / lower member 17 is rotated, the pressing roller 1
4 separates from the driving roller 13 against the biasing force. With the drive roller 13 and the pressing roller 14 separated from each other, the leading end of the film 100 is inserted to the roller position 23. In this state, the roller upper and lower member 17 is reversely rotated to bring the driving roller 13 and the pressing roller 14 into pressure contact with each other again. In this way, the roll film 1000 is fixed.

An engraved line 21 is formed on the entrance guide 1. In this embodiment, the film must be set so that the end of the second frame (second sheet) of the film comes to the score line 21. Since the operator cannot recognize the scan position inside the scanner, if the film is set at an arbitrary position, the starting end of the first frame (first sheet) will come to the right of the scan position 22, This is because the read first frame image is cut off.

A pressing plate 18 is provided on the entrance guide 1 to facilitate setting of the film 100. A shaft 20 is formed on the pressing plate 18, and the shaft 2
It is possible to stand vertically on the entrance guide 1 with 0 as a center and to remove it. The operator sets the roll film 100 as follows. First, the pressing plate 18
Standing vertically on the entrance guide 1, the entrance guide 1
The roll-shaped film 100 is placed on. Then, the roller upper and lower member 17 is rotated to separate the pressing roller 14 and the driving roller 13. Lift the holding plate 18 slightly and hold the holding plate 1
The leading end of the film 100 is passed under 8 to be inserted into the insertion slot 5 of the scanner. After that, the pressing plate 18 is tilted to the state shown in FIG. Roll-shaped film 100
Draws an arc (curls), so
The curled state of the film is removed by tilting the pressing plate 18. In this state, the end of the second frame (second sheet) of the film is aligned with the score line 21. Then, it is inserted into the gap between the pressing roller 14 and the driving roller 13. Then, the roller upper / lower member 17 is rotated in the reverse direction to press the pressing roller 1.
4 and the driving roller 13 are aligned. This is film 1
The setting of 00 is completed.

The engraved line 21 formed on the entrance guide 1
Depending on the position of, the starting end or the like of the third frame (third sheet) of the film may be on the score line 21. Film 1
00 is a frame 101 being imaged by a camera,
Piece space 10 between the first piece (first piece) and the second piece (second piece) 10
2 and the perforation unit 103. If friction occurs inside the piece width 104, scratches are likely to occur and there is a problem. Therefore, the entrance guide 1 receives the perforation portion 103 of the film 100, and thus the step portion 31 is formed. Further, the entrance guide 1 is formed with a protrusion 32 in accordance with the width of the film 100 in order to restrict the film 100 from moving in the width direction on the film entrance guide 1. At least the step portion 31 of the inlet guide 1 is preferably made of a resin having good slidability such as polyacetoal (POM).

3A and 3B are views showing the pressing plate 18 by the third angle method. FIG. 3A is a top view, FIG. 3B is a front view, and FIG. 3C is a side view. . A shaft 20 is driven into the pressing plate 18 and serves as a fulcrum for standing vertically or tilting sideways on the entrance guide 1. Axis 20
Since it is driven into the center of the pressing plate 18 in the thickness direction, the back surface of the pressing plate 18 can be used. Further, the pressing plate 18 is provided with an aperture section 24 for the operator to confirm the image of the film frame. In addition, the perforation portions 10 on both sides of the film 100
Stepped portions 25 and 26 are formed so as to press 3 (FIG. 2). The step portion 25 is formed so that the pressing plate 18 is laid sideways on the entrance guide 1 and the film inside 101 (FIG. 2) is not scratched when the film travels. The stepped portion 26 is provided on the entrance guide 1 with the pressing plate 1
It is formed in order to prevent scratches on the film inside 101 (FIG. 2) when the film 8 is laid down sideways and stands vertically.

FIG. 4 is a view for explaining the mechanism of the film moving roller 13 and the film pressing roller 14. 4A is a perspective view of the scanner seen from above, and FIG. 4B is a perspective view of the scanner seen from the side. The pressing roller 14 includes a driving roller 13 and a biasing spring 3
It is pressed by the biasing force of 8, and the shaft 36 of the roller up-and-down member 17 has a notch and serves as a cam. In FIG. 4B, the cutout portion of the shaft 36 is in contact with the pressing roller moving plate 37. When the roller upper / lower member 17 is rotated, the circumferential portion of the shaft 36 and the roller moving plate 37 come into contact with each other, so that the pressing mechanism 14 separates from the driving roller 13 against the biasing force by the cam mechanism. A gear train 19 is fitted on the shaft of the stepping motor 12. It is connected to a shaft equipped with a drive roller 13.

It is not always necessary to move the pressing roller 14 by a cam mechanism, but at least one of the pressing roller 14 and the driving roller 13 can be moved so that the film 100 can be easily inserted. FIG. 5 shows a cross section of the film moving guide 2 of the scanner body 4. At the scan position 22 (FIG. 2) passing through the optical axis window 39 (FIG. 4A), when the film movement guide 2 projects beyond the perforation 103 and protrudes inward from the frame width 104, a shadow is formed inside the frame 101. Harm occurs.
Therefore, the film moving guide 2 and the film 100 are in contact with each other outside the frame width 104 of the film 100. Further, the width of the film moving guide 2 is made slightly larger than the width of the film to restrict movement in the width direction of the film 100. Further, in order to prevent the film 100 from moving in the optical axis direction connecting the CCD sensor 11 and the LED 10 to cause a defocused state, the cross section is formed in a U-shape to prevent the film 100 from moving vertically. Optical axis and movement guide 2
The portion where and intersect may be narrowed particularly in the vertical direction (by the film thickness). Alternatively, a cam mechanism for supporting the film moving guide 2 may be provided and the handle outside the fuser can be rotated to move the film moving guide 2 in the optical axis direction so that focus adjustment can be performed.

The film moving guide 2 is made of a resin having good slidability such as polyacetoal (POM). FIG. 6 shows a cross section of the film exit guide 3. The film exit guide 3 and the film 100 are in contact with each other outside the frame width 104 of the film 100 (perforation portion 103). Also, film 1
The width of the film exit guide 3 through the film is only slightly larger than the width of the film so that 00 cannot move in the width direction in the film exit guide 3. The exit guide 3 is a polyacetoal (PO
It is made of a resin having good slidability such as M).

FIG. 7 shows a state in which the scanner 4 of the present invention and the film exit guide 3 are mounted. The film 100 is housed in a spiral shape to prevent the films themselves from rubbing against each other and being scratched, and also to prevent the films from becoming messy. Further, the outer shape of the film exit guide 3 is formed by cutting out a circular outer shape into three flat surfaces to prevent the film exit guide from rolling.

The film moving guide 2 includes a driving roller 13
Also, it extends from the position of the pressing roller 14 to the film discharge port 6. The film discharge port 6 is arranged so as to come to the entrance portion 35 of the exit guide 3. The entrance portion 35 is wide so that the leading end portion of the film 100 can easily enter. When the trailing edge of the roll film 100 is discharged by the drive roller 13 and the pressing roller 14, there is no film on the optical axis, and the output of the CCD sensor 11 becomes maximum. Therefore, if the maximum value of the output of the CCD sensor 11 is detected while the image on the film is being read, it is determined that the reading is completed and the drive roller 13 does not rotate. Then, the completion of reading is displayed on the monitor of the personal computer 7. The operator confirms this, removes the film exit guide 3 from the scanner 4, and removes the entrance portion 35.
The film 100 can be taken out with the above face up. Even in this case, since the outer shape of the exit guide 3 is notched so that the three surfaces are flat, the exit guide 4 can be easily rolled without rolling.
You can issue 00.

In the above embodiment, the drive roller 13
Although the pressing roller 14 and the pressing roller 14 are arranged only at the roller position 23 (FIG. 2), another driving roller and pressing roller may be arranged near the film insertion port 5 or near the film discharge port 6. Further, a driving roller and a pressing roller may be arranged near the film insertion port 5 and near the film ejection port 6. If you increase the number of rollers like this,
It is possible to more smoothly set the film 100 and the like. In particular, it is easy to insert a film and eject a film even if the strip film is a rather short strip film such as a film for 12 frames instead of a film for 36 frames.

Although the case where the one-dimensional CCD sensor 11 is used has been described, a two-dimensional CCD sensor may be used. In this case, the film is moved by one frame by applying a pulse for one frame instead of applying each pulse to the stepping motor. An image can be obtained by irradiating the film 100 with RGB light from the light source.

[0024]

According to the present invention, when a long roll-shaped document is set in alignment with the pointing portion indicating the reading start position, the curl (arc) state that is created on the document can be eliminated by the pressing plate. Therefore, the original can be accurately aligned with the instruction section. Further, since the pressing plate is provided with the opening, the image of the document can be visually confirmed.

[Brief description of drawings]

FIG. 1 is a schematic diagram when a film entrance guide and a film exit guide are attached to a scanner.

FIG. 2 is a brief description of the drawings for explaining a case where a film entrance guide is attached to a scanner and a film is set.

FIG. 3 is a diagram of a pressing plate represented by a trigonometric method.

FIG. 4 is a diagram illustrating a mechanism of a film moving roller and a pressing roller.

FIG. 5 is a cross-sectional view of a film movement guide.

FIG. 6 is a sectional view of a film outlet guide.

FIG. 7 is a diagram when a film exit guide is attached to the scanner.

[Explanation of symbols for main parts]

1, 41 ・ ・ ・ ・ Film entrance guide 2 ・ ・ ・ ・ Film moving guide 3 ・ ・ ・ ・ Film exit guide 4 ・ ・ ・ ・ Scanner body 10 ・ ・ ・ ・ Light source (RGB three-color LED) 11 ・ ・ ・・ Linear CCD sensor 12 ・ ・ ・ ・ ・ ・ Stepping motor 13 ・ ・ ・ ・ Drive roller 14 ・ ・ ・ ・ Pressing roller 17 ・ ・ ・ ・ Member for separating the pressing roller from the driving roller 18 ・ ・ ・ ・ ・ ・ Pressing plate 38 ・ ・..Spring 100 .... Film

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G03B 27/50 B

Claims (3)

[Claims] 1. An image reading device in which an illumination optical system for illuminating a document and photoelectric conversion means for photoelectrically converting reflected light or transmitted light of the document are fixed at predetermined positions, and the image of the document is read while moving the document. In the apparatus, a document table is formed on which the document is placed, an instruction section indicating a reading start position of the document is formed, and an opening for viewing the document is formed, and the document is pressed on the document table. A pressing member, an entrance opening into which the original placed on the original table is inserted, a pair of rollers that sandwich the original and move the original, and both sides of the original from the entrance opening to the vicinity of the roller. A first guide member for feeding formed so as to support the document, an exit opening for discharging the document, and both sides of the document from the vicinity of the roller to the exit opening. Image reading apparatus characterized by a second guide member for feeding formed so that. 2. The image reading apparatus according to claim 1, wherein the pressing member can be attached to and detached from the original table. 3. The pressing member has an axis which serves as a fulcrum of rotation on the document table of the document.
The image reading apparatus described in 1.