JP3381568B2 - Image reading apparatus and document alignment method thereof - Google Patents

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 capable of accurately aligning a transparent original with an original table.

[0002]

2. Description of the Related Art Conventionally, when an original is read in an image reading apparatus such as a scanner, the original is placed on a platen glass, the original is positioned, and then a reading scanning system ((hereinafter, scanning system At this time, the operator can visually check the corners or positioning marks of the rectangular platen glass, and finely adjust the position of the document using this mark as a guide to set the position. Finish the matching.

Generally, an image reading apparatus is divided into a document placing system for setting the position of a document and a scanning system for optically scanning a document placed on a platen glass. Due to the dimensional accuracy of the components that make up the scanning system, errors during assembly, and the like, output image positional deviation occurs. After the completion of the assembling of the scanning system, in order to eliminate the positional deviation that occurs between the document position reference of the document placement system and the actual document matched with the document position reference, the operator finally makes a rough adjustment, and Make fine adjustments and position the document.

[0004]

In order to align the position of the document with high accuracy, there is a deviation between the document position reference provided on the side of the platen glass of the document placing system and the document position reference set by the scanning system. It is desired that fewer image reading devices be manufactured.

However, it is difficult to completely eliminate the deviation between the document position reference of the scanning system and the document position reference of the document placing system due to dimensional accuracy of parts, assembly error and the like. In order to output such an image of the document at a proper position, the operator must finally manually adjust the position of the document.

Further, when a large number of transparent originals such as photographic films are placed on the platen glass for scanning, it is very complicated to position the multiple transparent originals individually on the platen glass. If the transparent original is placed directly on the glass, the transparent original easily becomes dirty. Further, when the position of one transparent original is displaced, and the adjacent transparent original comes into contact with or interferes with the displaced original, the position of the adjacent original may be displaced.

An object of the present invention is to provide an image reading apparatus capable of performing highly accurate positioning and reading an image without stains on the transparent original.

Another object of the present invention is to provide an image reading apparatus capable of simultaneously positioning a plurality of transparent originals with high accuracy and reading an image.

Another object of the present invention is to provide an image reading apparatus capable of accurately setting a transparent original, and aligning the output of the image reading apparatus with the position of the original placed by the operator with high accuracy. It is in.

Another object of the present invention is to provide an original position reference for a scanning system and an original placement system that are misaligned during manufacturing.
An object of the present invention is to provide an image reading device capable of highly accurately aligning a transparent document by an operator's operation.

[0011]

According to the image reading apparatus of the first aspect of the present invention, by using the guide pin, the adjusting pin, the document guide, etc. for aligning the document, the guide operation is performed by rotating the adjusting pin. Since the inclination angle of the document guide can be changed around the pin, even if there is a deviation in the position, angle, size, etc. of the document table of the document placement system, the position where the document is placed can be set as desired by the scanning system. The position can be aligned with high precision. Therefore, the output of the image reading apparatus provided with the document position aligning means becomes image data of the image positioned with high accuracy. Further, since the transparent original is held in the holder, a clearance can be formed between the transparent original and the original table, so that the stain on the original table does not directly adhere to the transparent original.

According to the image reading apparatus of the second aspect of the present invention, the document guide and the holder can be accurately positioned by the alignment surface and the holder positioning projection.

According to the image reading apparatus of the third aspect of the present invention, the document can be temporarily fixed to the holder by a simple method.

According to the image reading apparatus of the fourth aspect of the present invention, the guide pin hole and the adjustment pin hole are formed on the side opposite to the position of the operator with respect to the document table, so that the operator's original setting operation is hindered. Since there is no document, the position of the document can be easily set.

According to the image reading apparatus of the fifth aspect of the present invention, the guide pin hole and the adjustment pin hole are formed on the same plane as the document table. Documents can be set without any interference.

According to the image reading apparatus of the sixth aspect of the present invention, since the guide pin hole is set at a position closer to the corner resist on the document table than the adjustment pin hole, the position of the transparent document can be easily set. .

According to the document alignment method of the image reading apparatus of the seventh aspect of the present invention, the transparent document is set in the holder, the holder is aligned with the document guide, and the scanning system is operated. When the image data obtained by the operation of the scanning system is deviated, the position of the document guide can be easily corrected by rotating the adjusting pin based on the image data.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments showing an embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 2, 3, and 4, various components of the reading scanning system 3 are built in the case 2 of the image reading apparatus 1. A document placing system 4 for placing a document is formed on the upper surface of the case 2. 2,
In FIG. 3, the platen cover is removed.

When reading a transparent original, the transparent light source unit 7 (FIG. 4) is set in place of the platen cover. The transmissive light source unit includes a light source that scans in the sub-scanning direction. The light source irradiates the transparent original on the original table with light. The scanning of the light source is synchronized with the scanning of the reading scanning system such as the mirror under the document table.

The document placing system 4 also includes a platen glass 5 as a document table provided on the upper surface of the case 2, a corner resist 6 serving as a reference position of a document placed on the platen glass 5, and a platen cover of the platen glass 5. The transmission light source unit 7 also serves as a transmission light source unit, and hinges 8 and 9 for rotatably attaching the transmission light source unit 7 to the case 2.

A guide pin hole 11 for setting a document guide 42 shown in FIG. 7 and an adjusting pin hole 12 are provided on the side opposite to the operator side of the platen glass 5 of the document placing system 4.

As shown in FIG. 1, the transparent original guide 42 is set on the platen glass 5 of the image reading apparatus 1 on the side opposite to the operator.

As shown in FIG. 7, the transparent original guide 42 has a positioning surface 46 for aligning a positioning surface of a holder 51, which will be described later, and a holder positioning convex portion 44 for determining the position in the sub-scanning direction. This holder positioning protrusion 4
When the holder 51 is brought into contact with the four corners, the positions of the transparent original guide 42 and the holder 51 are determined.

Before setting the holder 51 on the transparent original guide 42, a plurality of slide films 52 as a plurality of transparent originals are set on the holder 51 at predetermined positions as shown in FIG. When the slide film 52 is set in the holder 51, the relative position between the holder 51 and the slide film 52 is specified. As shown in FIG. 1, one end surface of the holder 51 is brought into contact with the alignment surface 46 of the transparent original guide 42, the holder 51 is slid in the anti-sub-scanning direction with respect to the transparent original guide 42, and the holder positioning convex portion 44 is attached to the holder. 51
The positions of the holder 51 and the transparent original guide 42 are determined when the other end surface of the transparent contact guide 42 abuts.

An embodiment of the guide pin for adjusting the transparent document guide 42 on the platen glass 5 is shown in FIG. 5A.
An example of an adjustment pin shown in FIG. 6B for adjusting the inclination angle of the transparent original guide 42 is shown in FIGS. 6A and 6B.

The guide pin 17 is provided with legs 23 and 24 on the lower surface of a disk-shaped flange 25. Legs 23,2
4 has a cylindrical outer periphery and can be elastically fitted into the guide pin hole 11. The knob portion 22 is formed in a convex shape on the upper surface of the flange 25. The knob portion 22 has a cylindrical shape and can guide the circular hole 47 of the transparent original guide 42.

The adjusting pin 18 is provided with two leg portions 27, 28 eccentrically on the lower surface of a disc-shaped flange 29. The two legs 27 and 28 have a cylindrical outer shape and can be fitted into the adjustment pin hole 12 with an elastic force.
The knob portion 26 formed on the upper surface of the flange 29 can rotate this adjusting pin by a flat-blade screwdriver or the like. When the knob 26 is turned with a screwdriver while the legs 27 and 28 are fitted in the adjustment pin hole 12, the transparent original guide 42 can be displaced around the circular hole 47 in a direction toward and away from the platen glass 5. Is.

As shown in FIG. 4, the guide pin 17 is fitted into the guide pin hole 11, the adjusting pin 18 is fitted into the adjusting pin hole 12, and the circular hole 47 of the transparent original guide 42 is fitted into the knob portion 22 of the guiding pin 17. Then, the oblong hole 48 of the transparent original guide 42 is fitted into the knob portion 26 of the adjusting pin 18.
When the adjusting pin 18 is rotated in the fitted state, the transparent document guide 42 rotates around the circular hole 47 with respect to the platen glass 5, as shown in FIG.

As shown in FIG. 8, the inclination (scanning angle) of the transparent original guide 42 is adjusted by the adjustment pin 1 which guides the oval hole 48.
By turning 8, depending on the rotation angle, for example, -0.1
If 0, the position of the oval hole 48 of the transparent document guide 42 moves in the minus direction of 0.4 mm, and if +0.25, moves in the plus direction of 1.0 mm. The operator can convert the turning angle and the moving distance in advance, and turn the adjusting pin 18 by an appropriate angle so that the desired straight position can be obtained and correct the positional deviation of the transparent original guide 42.

Next, the procedure for aligning the document in this embodiment will be described.

As shown in FIG. 4, the guide pin 1 is inserted into the guide pin hole 11 and the adjustment pin hole 12 on the inner side of the platen glass 5.
7 and the adjusting pin 18 are fitted together. Next, the circular hole 47 of the transparent original guide 42 is set in the knob portion 22 of the guide pin 17.
, And the oval hole 48 is fitted into the knob portion 26 of the adjustment pin 38.

Then, the transmission light source unit 7 is closed and the scanning system is operated. Then, the transparent original is irradiated with light from the light source above the transparent original, and the light source is scanned in the sub-scanning direction. Then, the image of the transparent original output from the scanning system 3 under the platen glass 5 is displayed on a display device such as a computer (not shown) connected to the image reading device 1.

The eccentric position of the adjusting pin 18 is adjusted by rotating the knob portion 26 so that the inclination of the document to be placed on the platen glass 5 becomes zero from the inclination angle of the displayed image. In this way, with the position of the document 35 set to the proper scanning angle, the image data is read by the image reading apparatus 1.
Output to a computer or the like.

According to this embodiment, when there is a positional deviation between the scanning system and the document placing system, the transparent document guide 42 can be corrected to an appropriate angle by adjusting the turning angle of the adjusting pin 18.

Further, according to this embodiment, a large number of small transparent originals 52 can be aligned and temporarily fixed at desired positions of the holder 51, and when the transparent light source unit 7 is closed, the originals are scattered by the wind. To be prevented.

Further, according to the present embodiment, since a plurality of transparent originals 52 can be specified in a single holder 51 with a uniform positional relationship, it is difficult to move the specified positions, so it is appropriate to place them on a horizontal plane. The scanning system 3 can capture the image of the document at various positions.

As a holder according to another embodiment of the present invention, there is a holder 54 as shown in FIG. 11, for example. The holder 54 is a holder for a film such as a 35 mm film after development which is cut into a plurality of frames. Further, in the embodiment of the present invention, the holder 51 and the transparent original 52 are
Although the elastic body 53 is used for the temporary fixing, the transparent original can be temporarily fixed to the holder by a fixing method using a magnet, for example, in the invention.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a holder is set on a transparent original guide according to an embodiment of the present invention.

FIG. 2 is a plan view of the image reading apparatus according to the embodiment of the present invention with the platen cover removed.

FIG. 3 is a view taken in the direction of arrow II shown in FIG.

FIG. 4 is a perspective view of an image reading apparatus according to an embodiment of the present invention.

FIG. 5A is a side view of a guide pin according to an embodiment of the present invention, and B is a perspective view thereof.

FIG. 6A is a side view of an adjustment pin according to an embodiment of the present invention, and B is a perspective view thereof.

FIG. 7 is a plan view showing a transparent original guide according to an embodiment of the present invention.

FIG. 8 is a diagram showing a relationship between an adjustment pin and a fine adjustment angle for adjusting the position of the transparent original guide with respect to the platen glass.

FIG. 9 is a perspective view of a holder according to an exemplary embodiment of the present invention.

FIG. 10 is an explanatory diagram for setting a transparent original on the holder shown in FIG.

FIG. 11 is a perspective view of a holder according to another embodiment of the present invention.

[Explanation of symbols]

1 Image reading device 2 cases 3 scanning system 4 Original placement system 5 Platen glass 6 corner resist 7 Platen cover 8, 9 hinges 11 Guide pin hole 12 Adjustment pin hole 17 guide pins 18 Adjustment pin 42 Transparent original guide 44 Holder positioning protrusion 46 Alignment surface 47 round hole 48 oval holes 51 holder 52 Slide film (transparent document)

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04N 1/00-1/00 108 H04N 1/04-1/207 G03B 27/32 G03B 27/42-27 / 48 G03B 27/58-27/64

Claims (7)

(57) [Claims] 1. A holder capable of temporarily fixing a document, a document table on which the holder can be placed, a guide pin hole provided outside the document table, and a guide pin hole formed at a predetermined distance from the guide pin hole. An upper surface of the case having an adjustment pin hole, a guide pin that can be fitted into the guide pin hole, an adjustment pin that can be rotated and fitted into the adjustment pin hole in an eccentric positional relationship, and a guide pin that can be fitted into the guide pin The document guide includes a circular hole, an elongated hole that can be fitted to the adjustment pin, and a document guide having a positioning portion that positions the holder. The document guide changes the scanning angle of the document guide by rotating the adjustment pin. An image reading device characterized by being capable. 2. The positioning portion has a positioning surface capable of contacting a part or all of one end surface of the holder, and a holder positioning protrusion capable of contacting a part or all of the other end surface of the holder. The image reading apparatus according to claim 1, further comprising a section. 3. The image reading apparatus according to claim 1, wherein the holder is capable of temporarily fixing a document mechanically or magnetically. 4. The guide pin hole and the adjustment pin hole are formed on the upper surface of the case opposite to the position of the operator with respect to the document table. Image reading device. 5. The image reading apparatus according to claim 1, wherein the guide pin hole and the adjustment pin hole are formed on the same plane as the document table. 6. The image reading apparatus according to claim 1, wherein the guide pin hole is located closer to a corner resist on the document table than the adjustment pin hole. 7. A step of fitting the guide pin and the adjusting pin in the guide pin hole and the adjusting pin hole on the upper surface of the case, and a step of fitting the circular hole and the elongated hole of the document guide in the guide pin and the adjusting pin, Based on the image data obtained by setting the transparent original in a holder and aligning the holder with the original guide, operating the reading scanning system, and the image data obtained by the operation of the reading scanning system, And a step of correcting the position by rotating the adjustment pin.