JPH06152878A - Original set tool for picture reader - Google Patents

Abstract

PURPOSE:To improve the work efficiency by providing a magnet column to a set tool placed on an original platen so as to position an original such as a film simply in a correct attitude. CONSTITUTION:Magnet arrays 63-67 are arranged between transparent originals 7A-7D made of 35mm film. The originals 7A-7D are put between the magnet arrays 63-67 respectively, an original end pressure bar 69 is placed on each magnet array and the bar is magnetically attracted by the magnet column. Thus, the originals 7A-7D are held between a light diffusion plate 62 and the bar 69 while they are positioned in a correct attitude by the magnet arrays 63-67 and the originals 7A-7D are always read in a correct attitude.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an original setting tool for setting an original in a correct posture when reading an original such as a film with an image reading device.

[0002]

2. Description of the Related Art FIG. 7 is a sectional view showing a main part of an image reading apparatus (scanner).

In the figure, 1 is a casing, 2 is a top plate frame of the casing 1, 3 is a transparent document table (glass table) fitted in the top plate frame 2, 4 is a cover, and 5 is a top plate frame 2. The formed slits 10 are light source units for reading transparent originals, and have leg portions (not shown) extending downward from both sides, and the leg portions not shown extend from the slit 6 to the casing 1 and Is connected to a member driven by a drive mechanism (not shown).

FIG. 8 shows an essential part of the case-seating 1. Reference numeral 11 denotes a fluorescent lamp in which a light source unit 10 for reading a transparent original is stored. A reading unit 20 has a frame 21, and a plate-shaped sensor holder 23 having a line CCD sensor 22 mounted on the lower surface of the frame 21 is attached by a screw 24.
A control board 27 is supported by screws 24 and 26 underneath 3 via spacers 25. The frame 21 has a raised portion 21A and a tubular portion 21B which is opened in the raised portion 21A and extends vertically upward, and a converging rod lens array 28 is attached to the tubular portion 21B. The line CCD sensor 22 is arranged immediately below the converging rod lens array 28.

Reference numeral 30 is a light source unit for reflection, which has a fluorescent lamp 31, is located behind the cylindrical portion 21B, and is held by the carriage 40 together with the reading unit 20.
A guide roll 32 is engaged with the lower surface of the transparent document table (glass table) 4 and rolls.

The carriage 40 can be reciprocally driven in the left-right direction in the figure by the drive mechanism (not shown) using the slide shaft 50 as a guide shaft. Reference numeral 7 is a transparent original, and 8 is a light diffusion plate.

When reading a transparent original, the transparent original 7
On the transparent original table (glass table) 4, cover the transparent original 7 with the light diffusing plate 8 and press a reading start button (not shown) to power the fluorescent lamp 11 of the light source unit 10 for reading the transparent original to illuminate. And the driving mechanism (not shown) is driven. As a result, the reading unit 20 moves in the arrow direction from a home position (not shown). At this time, the light source unit 10 for reading the transparent original moves together with the reading unit 20.

[0008]

By the way, the transparent original 7
For this, a 35 mm film or a 4 × 5 ′ film is often used, but when reading a transparent original of this type, conventionally, as shown in FIG. The vertical and horizontal lines are aligned with the X and Y reference lines of the glass table 4. This is because, if the glass table 4 is slanted with respect to the X and Y reference lines, the read image is also slanted, and correction by a computer that performs image processing is a difficult task.

Further, in order to improve the efficiency, it is only necessary to read a plurality of sheets simultaneously instead of reading one by one, but when a plurality of transparent originals 7 of this kind are arranged on the glass table 4, the glass table 4 is used. Even if they are arranged in the correct posture, when the diffusion plate 8 is placed on the top, static electricity or wind pressure often causes one of the postures to collapse. Therefore, when it is desired to read a plurality of sheets at the same time, conventionally, the transparent original 7 is attached to the glass table 4 with a cellophane tape or the like. However, there is a problem that the glass table 4 gets dirty and the like.

The present invention has been made in order to solve this problem, and provides a transparent original setting tool which makes it easier to set an original such as a film on an original table as compared with the conventional method. The purpose is to

[0011]

In order to achieve the above object, the present invention provides, in claim 1, a document pressing cover for covering a document on a document table of an image reading device, and a document pressing cover on the document table side. It consists of a row of permanent magnets arranged in a predetermined pattern on one side and one or more bars for holding the document edge made of a magnetic material of a predetermined length. The edge is held.

According to a second aspect of the present invention, the permanent magnet row is a row of magnets arranged in parallel at a predetermined interval, and the row direction is a direction orthogonal to the scanning direction of the sensor constituting the image reading device. And

According to a third aspect of the present invention, when the sensor is a line CCD sensor and the line CCD sensor is composed of a plurality of chips, the line CCD sensor has a pair of magnet rows that are orthogonal to the pixel row direction of each chip. It has a structure.

In the fourth aspect, the document pressing cover is a light diffusing plate.

According to a fifth aspect of the present invention, the heads of the respective magnets of the permanent magnet array project from the one surface of the document pressing cover on the document table side so that the document can be positioned.

According to a sixth aspect of the present invention, the bar for pressing the document edge is
A fitting protrusion for positioning the document is provided, and the fitting protrusion is configured to be engageable with the feed hole of the document.

According to a seventh aspect of the present invention, the head protruding from the one surface of the permanent magnet disposed on one surface of the original pressing cover on the original table side also serves as the fitting protrusion for positioning the original.

According to the eighth aspect of the present invention, the bar for holding the document edge is blackened. Claim 9 The permanent magnet is removable.

[0019]

According to the present invention, the original can be easily positioned in the correct posture by the magnet array, and the original edge holding bar can be held on the set tool in this correct posture only by placing it on the magnet array.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 and 2, reference numeral 61 denotes a main body of the transparent original setting tool, and in this embodiment, the light diffusion plate (thickness, for example, 3 to 5 mm) 8 shown in FIG. 2 is used.
Reference numeral 62 denotes one surface of the main body 1 of the transparent original setting tool (transparent original table glass table 4 side surface), and 63 to 67 are magnet arrays arranged on the one surface, and are parallel to each other in the sensor main scanning direction with an interval L therebetween. Each of the magnet rows is composed of a plurality of magnets M1 to Mn arranged in one row. As shown in FIG. 2, the magnets M1 to Mn are arranged so as to be embedded in the one surface 2, and the heads of the magnets project from the surface of the one surface 2 only slightly. Reference numeral 69 shown in FIG. 2 is a bar for pressing the edge of the document, which is black-treated to prevent light reflection and has a predetermined thickness (for example, 0.1 mm) made of a magnetic material.
It consists of a slender plate. The document edge pressing bar 69 has a width slightly larger than the width W of the magnet by Δ2w. 7A
7D are transparent originals.

The magnet arrays 63 to 67 are line CCDs as described above.
The chip chip forming the sensor 22 extends in a direction orthogonal to the pixel column direction.

FIG. 3 shows the body 61 of the transparent original setting tool.
FIG. 4 shows a state in which transparent originals 7A to 7D are held, and FIG. 4 is a partially enlarged view thereof. Transparent originals 7A to 7D
Is a 35 mm film, and the magnet arrays 63 to 67 are sequentially arranged in parallel with each other with a width of the transparent originals 7A to 7D. Figure 4
In the figure, 7a is a film feed hole.

In this structure, the transparent original 7A is placed between the magnet rows 63 and 64, the transparent original 7B is placed between the magnet rows 64 and 65, the transparent original 7C is placed between the magnet rows 65 and 66, and the transparent original 7D is placed. It is inserted between the magnet rows 66 and 67, and a document edge pressing bar 69 is placed on each magnet row along the magnet row, and the magnet rows are magnetically attracted. At this time, the left and right edges of the original edge pressing bar 69 in the longitudinal direction are placed on the magnet array so as to cover the edges of the transparent original.

In this way, the transparent originals 7A to 7D are held between the light diffusing plate one side 62 and the original edge pressing bar 69 while being positioned in the correct posture by the magnet arrays 63 to 67.

When reading the transparent originals 7A to 7D at one time, the transparent originals 7A to 7D are held by the light diffusing plate 8 in this manner, and the light diffusing plate 8 is placed on the transparent original plate 4 on one side 2 side. The transparent original table 4 is set to face the side surface.

FIG. 5 shows another embodiment of the present invention, in which two magnet arrays 71a for positioning the transparent original 7A,
71A and two magnet arrays 7 for positioning the transparent original 7B
2a, 72B, two magnet arrays 73a, 73B for positioning the transparent original 7C, and 2 for positioning the transparent original 7D
A pair of magnet rows 74a and 74B, and a pair of magnet rows 71a and 71B and a pair of magnet rows 72a and 72B.
B, paired magnet rows 73a, 73B, paired magnet rows 7
4a and 74B correspond to the chips 11 to 14 in a ratio of 1: 1.

The effective reading length of the chip chip constituting the line CCD sensor 22 is, for example, about 50 mm.
When configuring a sensor having an effective reading length of about 200 mm, four chips chip are arranged as shown in the figure. At this time, almost constant photoelectric characteristics are obtained in the chip chip, but the chip chip and the adjacent chip ch
When it moves to ip, the characteristics change, a step is generated at the joint between chips, and if A / D conversion is performed as it is and shaving correction is performed, a density difference occurs and the image quality deteriorates. In order to prevent the deterioration of the image quality, it is corrected by computer processing. This correction takes time.

If the transparent original setting tool is constructed as shown in FIG. 5 so that each chip is made to correspond to each film, the above correction becomes unnecessary, and highly accurate reading is possible. Becomes

In the embodiment shown in FIGS. 1 and 2, the transparent original is placed between the magnet rows to position the transparent original, but as shown in FIG.
The portion protruding from may be the protrusion 70 that engages with the feed hole 7a of the film of the films 7A to 7D. A similar protrusion may be provided on the document edge pressing bar 69.

Further, the number of magnets in each of the magnet arrays 63 to 67 and the magnet spacing are set as long as the original can be positioned and the original can be held.
There is no particular limitation.

Further, the magnets in each of the magnet rows 63 to 67 may be detachably arranged so that the row spacing L can be changed according to the document width. In this case, the light-diffusing plate is provided with a magnet arrangement hole array having different intervals L.

In the above embodiment, the transparent original is used as an example, but a reflective original may be used.

[0034]

As described above, according to the present invention, by providing the set of tools placed on the original table with the magnet array, the original can be easily positioned in the correct posture by the magnet array, and the edge of the document can be pressed. Since the set tool can be held in this correct posture just by placing the bar on the magnet array, the original can be always read in the correct posture, which is particularly suitable for reading a plurality of originals at the same time. Yes, if you prepare multiple set tools, you can greatly improve work efficiency.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the above embodiment.

FIG. 3 is a plan view showing a usage state of the above embodiment.

FIG. 4 is a partially enlarged view of FIG.

FIG. 5 is a plan view of another embodiment of the present invention.

FIG. 6 is a diagram showing another example of the magnet in the above embodiment.

FIG. 7 is a perspective view of an image reading device.

FIG. 8 is a diagram showing a main part of the image reading apparatus.

FIG. 9 is a diagram for explaining a problem of the image reading apparatus.

[Explanation of symbols]

 5 Document Plate 7A to 7B Document 8 Light Diffusing Plate as Cover for Document Press 22 Line CCD Sensor 61 Main Body 62 Surface 63 to 68 Magnet Array 69 Document Edge Edge Holding Bar 70 Protrusion 71a, 71A to 74a, 74A Magnet Array M1 Mn magnet

Claims (9)

[Claims] 1. An original pressing cover for covering an original on an original plate of an image reading device, a permanent magnet array arranged in a predetermined pattern on one side of the original pressing cover on the original plate side, and one or a plurality of permanent magnet rows. An original setting tool for an image reading apparatus, comprising an original document edge holding bar made of a magnetic material of a predetermined length, and holding the edge of the original by a magnet array and the original edge holding bar. 2. The permanent magnet array is a magnet array that is arranged in parallel at a predetermined interval, and the direction in which the magnets are arranged is a direction orthogonal to the main scanning direction of the sensor that constitutes the image reading device. The document setting tool of the image reading apparatus according to claim 1. 3. The sensor is a line CCD sensor,
When the line CCD sensor is composed of a plurality of chips, the line CCD sensor has a pair of magnet rows that are respectively orthogonal to the pixel row direction of each chip, and the original set of the image reading apparatus according to claim 2. tool. 4. The document setting tool for an image reading apparatus according to claim 1, wherein the document pressing cover is a light diffusion plate. 5. A document set for an image reading apparatus according to claim 1, wherein the heads of the respective magnets of the permanent magnet array are projected from one surface of the document pressing cover on the document table side so that the document can be positioned. tool. 6. The document edge pressing bar is provided with a fitting protrusion for positioning the document, and the fitting protrusion is engageable with a feed hole of the document. Document setting tool for the described image reading device. 7. The head of the permanent magnet provided on one side of the document pressing cover on the side of the document table, the head projecting from the one side also serving as a fitting protrusion for positioning the document. Original reading tool for image reading devices. 8. The manuscript setting tool for an image reading apparatus according to claim 1, wherein the manuscript edge holding bar is subjected to black processing. 9. The manuscript setting tool for an image reading apparatus according to claim 1, wherein the permanent magnet is removable.