JP5141178B2 - Image reading apparatus and image inspection method - Google Patents

Description

  The present invention relates to an image inspection apparatus and an image inspection method.

Among various printing technologies, a large number of cylindrical convex lenses (hereinafter referred to as convex lenses).
Are printed on the recording layer of a lens sheet having lenticular lenses arranged in parallel.
Some of them print (including inspection images). In such a printing technique, a large number of stripe-shaped subdivided images corresponding to the pitch of the convex lenses are recorded side by side on the recording layer of the lens sheet. And according to the kind of subdivision image, it becomes possible to make it the photograph (animation) which the image visually recognized is viewed stereoscopically or changes the viewing angle.

By the way, there is a technical content disclosed in Patent Document 1 for reading a lens sheet with a scanner. Although Patent Document 2 does not read a lens sheet, a test image is printed on a print sheet, the test image is read by a scanner, and an end line of the read image data and an end line of the print sheet Based on the above, the accuracy of the conveyance angle is calculated.

JP 2007-127521 A Utility Model Registration No. 3080053

By the way, in the technical content disclosed in Patent Document 1, when the lens sheet is read by a scanner, the longitudinal direction of the lenticular lens and the scanning direction of the carriage (head) of the scanner are not parallel to each other, and are predetermined with respect to the scanning direction. May be inclined by an angle of. When such an inclination occurs, in Patent Document 1, an inclination angle is calculated and a rotation process is performed. However, the calculation of the tilt angle and the rotation process are heavy in processing load.

Further, according to Patent Document 2, the inclination angle is calculated and rotated with reference to the edge of the print medium. However, as in Patent Document 1, there is a problem that the processing load is large. Therefore, there is a demand for a method (configuration) that does not require tilt angle calculation or rotation processing in the image reading apparatus.

The present invention has been made on the basis of the above circumstances, and an object of the present invention is to provide an image reading apparatus that does not require calculation of a tilt angle of a lens and rotation processing.

In order to solve the above-mentioned problems, the present invention provides an image reading apparatus for reading a lens sheet by placing a lens sheet having a plurality of lenses having one longitudinal direction on the document table. In order to prevent the positional deviation of the lens sheet, a sheet guide including an engaging portion that engages with the lens is provided.

In such a configuration, the lens can be reliably prevented from being inclined by engaging the lens with the engaging portion. Further, it is possible to prevent the lens sheet from moving, and it is possible to improve the readability of the lens sheet. Further, since the lens sheet does not shift due to the engagement between the engagement portion and the lens, the angular arrangement of the engagement portion in the read image can be adjusted in advance or can be known. Therefore, calculation of the tilt angle with respect to the read image of the lens sheet and rotation processing become unnecessary, and the processing load can be greatly reduced.

According to another invention, in addition to the above-described invention, the engaging portion is provided on the side of the glass plate of the document table that is separated from the rotation base portion of the document cover.

In such a configuration, since the engaging portion exists on the side away from the base of the document cover, the lens sheet can be attached even if the lens and the engaging portion engage with each other to cause a raised portion or the like on the lens sheet. The document cover can be covered without any trouble.

Furthermore, in another invention, in addition to each of the above-described inventions, the engaging portion has a long and convex protrusion, and the protrusion is provided with a lens. It is arranged at the same pitch as the existing pitch.

When constituted in this way, it becomes possible to use the same member as a lens of a lens sheet, for example as a convex strip. Further, if the projections are engaged in a state where the longitudinal direction of the ridges coincides with the longitudinal direction of the lens, it is possible to reliably prevent the lens sheet from inclining and improve the readability of the lens sheet. It becomes possible. Further, the angular arrangement of the ridges in the read image can be adjusted in advance or can be known. Therefore, calculation of the tilt angle with respect to the read image of the lens sheet and rotation processing become unnecessary, and the processing load can be greatly reduced.

In another invention, in addition to the above-described inventions, the engaging portion further includes a long and concave groove, and the lens is disposed on the groove. It is arranged at the same pitch as the existing pitch.

When configured in this manner, if the longitudinal direction of the concave line and the longitudinal direction of the lens are engaged with each other, the lens sheet can be reliably prevented from inclining, and the readability of the lens sheet is improved. It becomes possible. Further, the angular arrangement of the grooves in the read image can be adjusted in advance or can be known. Furthermore, when a lens such as a convex lens enters the concave stripe, it is possible to reduce the height of the portion of the lens sheet that engages with the engaging portion compared to the case where the convex stripe is used. It becomes. Therefore, in the engaging portion, it is possible to greatly reduce the dimension of the lens sheet that rises.

Further, according to another invention, in addition to the above-described inventions, the engaging portion is provided on the periphery of the document table, which is a portion where the lens sheet L is not read.

In such a configuration, the engaging portion exists on the periphery of the document table and does not exist on the glass plate. Therefore, the reading area of the lens sheet on the glass plate is not reduced, and a sufficient area can be secured.

According to another invention, in addition to the above-described inventions, the sheet guide further includes a transparent portion that is continuous with the engaging portion and capable of transmitting light, and the lens sheet is read through the transparent portion. Is what is done.

In the case of such a configuration, it is not necessary to provide a sheet guard in advance at a site such as a glass plate or the periphery of the document table. That is, the sheet guide can be used as an attachment to an existing document reading apparatus. Even when the resolution of the lens sheet is changed, it is only necessary to use a sheet guide corresponding to the resolution of the lens sheet. For this reason, design changes or the like do not occur in the existing composite apparatus or scanner apparatus, and the effects of the present invention can be realized at low cost. In addition, the resolution of various lens sheets can be supported.

Furthermore, in addition to the above-mentioned invention, the other invention further provides a sheet guide for the glass plate,
It is fixed via an adhesive layer. When configured in this way, it is possible to reliably prevent the positional deviation of the sheet guide including the transparent portion.

According to another invention, in addition to the above-described inventions, a pressing member is arranged on the upper portion of the portion where the lens is engaged with the engaging portion. In the case of such a configuration, even when the lens sheet is bent at a portion facing the engaging portion, the occurrence of the bending can be prevented. Thereby, the engagement between the lens and the engaging portion becomes good. In addition, it is possible to more reliably prevent the lens sheet from being displaced.

<First Embodiment>
The image reading apparatus according to the first embodiment of the present invention will be described below with reference to FIGS.

<About lens sheet>
First, the lens sheet L to be read will be described. As shown in FIG. 1, the lens sheet L includes a lenticular lens L1 located on the front surface, an ink absorbing layer L2 in contact with the back surface of the lenticular lens L1, and an ink transmission layer L3 located on the back surface of the lens sheet L. It has. Among these, the lenticular lens L1 has a configuration in which a plurality of cylindrical convex lenses (convex lenses L11) whose longitudinal direction is one direction are arranged in parallel at a constant pitch. In the lenticular lens L1, each convex lens L1
The curvature of the convex lens L11 is preferably formed such that the focal point of the light traveling 1 is located on the back surface of the lenticular lens L1.

The ink transmission layer L3 is a portion to which ink droplets ejected from a nozzle (not shown) first adhere, and is a portion through which the attached ink passes. This ink transmission layer L3 is made of fine particles such as titanium oxide, silica gel, PMMA (methacrylic resin), barium sulfate,
Glass fiber, plastic fiber or the like is used as a material. The ink absorption layer L2 is a part that absorbs and / or fixes the ink that has passed through the ink transmission layer L3. The ink absorption layer L2 is formed using, for example, a hydrophilic polymer resin such as PVA (polyvinyl alcohol), a cationic compound, fine particles such as silica, or the like. The lenticular lens L1 is made of PET, PETG, APET, PP, PS, PVC, acrylic, UV resin, or the like.

The ink absorption layer L2 is transparent, and the ink transmission layer L3 is white. However, the ink absorption layer L2 may be white, the ink transmission layer L3 may be transparent, and both the ink transmission layer L3 and the ink absorption layer L2 may be transparent. In the present embodiment, the presence of the ink transmission layer L3 allows the lens sheet L to be touched immediately even after printing. However, the lens sheet L is
You may employ | adopt the structure which does not comprise the ink permeable layer L3.

Further, as shown in FIG. 1, the lens sheet L in the present embodiment has a rectangular appearance, and the edge of the lens sheet L constituting the rectangular appearance has a convex lens L1.
1 is parallel to the longitudinal direction.

<Overall Configuration of Image Reading Apparatus>
FIG. 2 is a perspective view showing the external appearance of the computer PC and the composite apparatus 10 constituting the image reading apparatus. The composite apparatus 10 includes a printer function unit 10B in addition to the scanner function unit 10A.
Further, the scanner function unit 10A and the printer function unit 10B are combined to form a so-called multi-function machine having a copy function. A personal computer PC is connected to the composite apparatus 10, and various processes such as processing of an image read from the composite apparatus 10 can be performed in the computer PC.

The composite apparatus 10 includes a casing 20, a scanner function unit 10A including a document table 30 and a sheet guide 40A on which a document is placed, and a document that covers a reading target (lens sheet L or the like) placed on the document table 30. And a cover 60. The scanner function unit 10A is provided with various internal mechanisms, such as a carriage 70, described later.

The composite apparatus 10 includes a printer function unit 10B. The printer function unit 10B is supplied with a print medium from a paper feeding device 21 that supplies a print medium (plain paper, lens sheet L, etc.), and the print medium printed by the printer function unit 10B is discharged from a discharge port 22. It has come to be. As described above, the multifunction apparatus 10 includes the printer function unit 10B, and can form an image on a print medium in addition to a function of reading an image. The composite apparatus 10 includes a plurality of operation buttons 23, and the operation buttons 23
As a result, it is possible to select functions of the composite apparatus 10 and to command various operations.

As shown in FIG. 2, a document table 30 is provided on the top surface 20 a of the housing 20. The document table 30 is configured by fitting a transparent glass plate 31 into an opening 32 having a rectangular opening on the top surface 20a. In addition, a sheet guide 40A described later is provided on the front side of the glass plate 31 (side away from the pivot base portion of the document cover 60). The reading object is placed on the document table 30 (glass plate 31) with its reading surface facing the document table 30 (glass plate 31). Accordingly, the illumination light emitted from the LED array 72 is transmitted through the glass plate 31 to illuminate the document surface, and this reflected light is transmitted through the glass plate 31 again and is incident on the image sensor 71.

FIG. 3 is a diagram showing an outline of the mechanism of the scanner function unit 10A in the composite apparatus 10 of the present embodiment. As shown in FIG. 3, the composite apparatus 10 includes a carriage 70 including an image sensor 71 and an LED array 72 as an image reading unit, a carriage moving mechanism 80 for moving the carriage 70, a control unit 120, and the like. The image sensor 71 is a one-dimensional image sensor in which a plurality of light receiving elements are arranged in a line, and the LED array 72
A plurality of LED elements are arranged along the arrangement direction of the light receiving elements of the image sensor 71. The control unit 120 controls the printer function unit 10B and the scanner function unit 10A, and is also configured as a control unit that executes a printer function and a copy function in addition to the scanner function.

The carriage moving mechanism 80 has a direct current motor (hereinafter referred to as a DC motor) 8 as a drive source.
1, the worm gear 82 joined to the output shaft 81 a of the DC motor 81, and the worm gear 8.
2 and a spur gear 83 that rotates at a predetermined reduction ratio, and a pulley 84 joined to the spur gear 83.
a, a pulley 84b disposed with the document table 30 sandwiched between the pulley 84a, and a pulley 84
a timing belt 85 stretched between a and the pulley 84b, and the timing belt 8
5 is provided with a guide rail 86 and the like arranged along the extending direction of 5.

When the DC motor 81 is driven, the timing belt 85 rotates through the worm gear 82, the spur gear 83, and the pulley 84a. A part of the timing belt 85 is fixed to the carriage 70. The carriage 70 is slidably connected to the guide rail 86. Therefore, when the timing belt 85 rotates, the carriage 7
0 moves along the guide rail 86.

The image sensor 71 and the LED array 72 provided in the carriage 70 are arranged on the carriage 7.
Move with 0. The light receiving elements of the image sensor 71 are arranged in a direction orthogonal to the scanning direction of the carriage 70. Accordingly, in conjunction with the movement of the carriage 70 in the scanning direction, the image sensor 71 reads the original table 30 side of the reading object in a line shape in a direction perpendicular to the scanning direction, so that the image sensor 71 Original platen 30
Scan the side image. Illumination light is irradiated from the LED array 72 to the document table 30 side of the object to be read, and reflected light from the document surface of the illumination light is incident on the image sensor 71.
Charges corresponding to the image of the reading object on the side of the document table 30 are accumulated in the image sensor 71. This electric charge is output to the computer PC as image data in the form of an electric signal.

As shown in FIG. 4, the printer function unit 10B includes a printer ASIC 105 described later.
In addition, a paper discharge roller 101, a paper feed motor 102, a carriage 110, a print head 111,
A carriage shaft 112, a carriage motor 113, a belt 114, a cartridge 115, and the like are provided, but description of each of those components is omitted.

<About the control unit>
Next, the control unit 120 will be described. The control unit 120 shown in FIG.
have. Main control unit 120C includes CPU 121, ROM 122, RAM 123, PR
OM124 etc., and these, printer ASIC105, scanner ASIC2
00 and the like are connected so that data can be transmitted and received alternately via a transmission line such as a bus.

Among the above-described configurations, the printer ASIC 105 is a dedicated IC for driving the print head 111 and various motors based on signals from various sensors (not shown). The scanner ASIC 200 controls the operation of the DC motor 81 / image sensor 71 and the like, and stores read data read by the image sensor 71 in a scanner area (reference number omitted) of the RAM 123.

<About the sheet guide>
Next, the configuration of the sheet guide 40A provided on the document table 30 will be described with reference to FIGS. 2, 5, and 6. FIG.

As shown in FIG. 2, the sheet guide 40 </ b> A is provided, for example, on the front side of the glass plate 31 of the document table 30. As shown in FIGS. 5 and 6, the sheet guide 40A is
A board 41 and a ridge 42 that is positioned above the board 41 and provided in a convex shape and a long shape are provided, and the engaging portion is formed by the whole (collection) of the plurality of ridges 42. 43A is configured.

The substrate 41 and the ridges 42 are portions corresponding to the lenticular lens L1 in the lens sheet L, and are provided integrally. However, you may employ | adopt the structure which provides the board | substrate 41 and the protruding item | line 42 separately. In the case of adopting a separate configuration, the same protrusion 42 as the lenticular lens L <b> 1 is attached to the upper surface side of the substrate 41.

The substrate 41 may have the thickness dimension of the lenticular lens L1 itself, but the substrate 41 is made thinner than that of the lenticular lens L1 (for example, thinned to a portion indicated by a two-dot chain line in FIG. 6). It may be configured as follows. When the substrate 41 is thinned, the portion of the lens sheet L placed on the engaging portion 43 </ b> A is less bulged upward than the portion placed on the glass plate 31. Therefore, the readability of the reading surface of the lens sheet L is improved.

In the present embodiment, the engaging portion 43A is formed in the same shape as the lenticular lens L1 of the lens sheet L. That is, each convex lens L forming the lenticular lens L1.
11 is provided at the same pitch as the arrangement pitch of the lenticular lenses L1. In the glass plate 31, in order to read the lens sheet L, the engaging portion 43A is provided so as to have a necessary minimum width dimension (dimension in the short direction). The longitudinal direction of the engaging portion 43 </ b> A is provided over the entire longitudinal direction of the glass plate 31. However, it is not necessary to employ a configuration in which the engaging portion 43 </ b> A is provided over the entire length of the glass plate 31.

The engaging portion 43A is formed of the same member as the lenticular lens L1, but when the substrate 41 is formed by resin molding, a mold surface corresponding to the engaging portion 43A is previously formed on the molding die. Thus, the engaging portion 43 </ b> A (projection strip 42) may be formed integrally with the substrate 41. Moreover, you may form the board | substrate 41 with a metal plate. In this case, the engaging portion 43A (projection 42) can be formed by cutting the metal plate.

With the above configuration, when reading the lens sheet L, the front side of the lens sheet L is engaged with the engaging portion 43A. At this time, the lens sheet L places the lenticular lens L1 side on the engaging portion 43A. As a result, the convex lens L11 and the convex strip 42 of the lens sheet L are engaged with each other, and the lens sheet L is positioned in the short side direction of the document table 30 (direction perpendicular to the scanning direction of the carriage 70) by the engaging portion 43A. Is called. Also, ridge 4
The longitudinal direction 2 is provided along the longitudinal direction of the document table 30.

<Effects produced by the configuration of the first embodiment>
According to the configuration as described above, the convex lens L11 of the lens sheet L is moved to the convex portion 42 by engaging the lenticular lens L1 with the engaging portion 43A (that is, the convex lens L11 and the convex strip 42 are engaged). It is possible to follow the longitudinal direction, and it is possible to reliably prevent the convex lens L11 from being inclined. In addition, the lens sheet L can be prevented from moving in a direction (short direction) perpendicular to the length of the convex lens L11, and the lens sheet L can be prevented from moving in the short direction when the lens sheet L is read. It becomes possible to prevent.

Further, since the length of the convex lens L11 does not deviate from the convex stripe 42, the angular arrangement of the convex lens L11 in the read image becomes fixed, and the angular arrangement of the convex stripe 42 can be adjusted in advance or can be known. It becomes. Therefore, calculation of the tilt angle with respect to the read image of the convex lens L11 and rotation processing are unnecessary, and the processing load can be greatly reduced.

<Second Embodiment>
Hereinafter, a second embodiment of the present invention will be described with reference to FIG. The same configuration as that used in the first embodiment will be described using the same reference numerals.

In the present embodiment, in addition to the first embodiment described above, a presser base M (corresponding to a presser member) for pressing the lens sheet L is further provided. That is, even if the lenticular lens L1 side of the lens sheet L is placed on the engaging portion 43A, the entire lenticular lens L1 does not contact the engaging portion 43A due to the height dimension of the sheet guide 40A, etc. The part may be in a raised state. Therefore, as shown in FIG. 7, after the lenticular lens L1 side is engaged with the engaging portion 43A, the presser base M is placed on the portion of the lens sheet L engaged with the engaging portion 43A. To do.

Here, since the document cover 60 is located above the presser base M, it is preferable that the presser base M does not have a large dimension in the height direction. Therefore, the presser base M shown in FIG.
It is provided in a flat shape (plate shape) having a predetermined thickness.

The weight of the presser base M may be any weight as long as the engagement between the lenticular lens L1 and the engaging portion 43A is improved. As an example of the weight of the press stand M, the press stand M may be 150 g or more.

<Effects produced by the configuration of the second embodiment>
According to the above configuration, by placing the presser base M above the lens sheet L,
Even if the lens sheet L is bent at a portion facing the engaging portion 43A, the occurrence of the bending can be prevented. Thereby, the lenticular lens L1 and the engaging portion 43
Engagement with A becomes good, and it becomes possible to make the ridge 42 follow the length of the convex lens L11 more reliably. In addition, it is possible to more reliably prevent the positional deviation of the lens sheet L (deviation in the rotational direction).

<Third Embodiment>
Hereinafter, a third embodiment of the present invention will be described with reference to FIG. The same configuration as that used in the first embodiment will be described using the same reference numerals.

In the present embodiment, a sheet guide 40C as shown in FIG. 8 is used instead of the sheet guide 40A in the first embodiment described above. The sheet guide 40A (in the first embodiment) shown in FIG. 5 has a configuration having the convex strips 42, whereas the sheet guide 40C (in the present embodiment) shown in FIG. A concave strip 44 is provided which is shaped and elongated. And the engaging part 43C is comprised by the whole (aggregation | set) of the some concave strip 44. FIG.

The recess 44 is provided integrally with the substrate 41. Further, the concave stripe 44 is formed by pouring a predetermined resin (made of the same material as the lenticular lens L1) into a mold having the same shape as the lenticular lens L1, for example.

The engaging portion 43C in the present embodiment is configured such that a considerable portion of the arcuate curved surface of the lenticular lens L1 enters. However, the concave stripe 44 may be provided in a shallow groove shape so that only the protruding tip side (upper side in FIG. 8) of the arcuate curved surface of the lenticular lens L1 enters. In that case, adjacent concave 44
The boundary portion between them does not form a straight line as shown in FIG. 8, but forms an elongated flat surface or a predetermined curved surface shape.

Here, the substrate 41 positioned below the recess 44 is thinned, for example, about 0.1 mm.

<Effects produced by the configuration of the third embodiment>
According to the above configuration, it is possible to obtain the same effect as that of the engaging portion 43 including the ridge 42 as in the first embodiment described above. That is, by engaging the lenticular lens L1 with the engaging portion 43C (that is, the convex lens L11 and the concave stripe 44 are engaged), the convex lens L11 of the lens sheet L can be aligned along the longitudinal direction of the concave stripe 44. This makes it possible to reliably prevent the convex lens L11 from tilting. In addition, the lens sheet L can be prevented from moving in a direction (short direction) perpendicular to the length of the convex lens L11, and the lens sheet L can be prevented from moving in the short direction when the lens sheet L is read. It becomes possible to prevent.

Further, in the concave stripe 44, the convex lens L11 enters, so that it engages with the engaging portion 43C of the lens sheet L as compared with the case where the convex stripe 42 in the first embodiment is used. It becomes possible to reduce the height (swell) of the portion. That is, in the first embodiment or the like, the convex lens L11 enters the boundary portion between adjacent convex strips 42, but the protruding tip side of the convex lens L11 that is separated from the ink absorbing layer L2 is the projection of the convex strip 42. It is in a state located in the middle. However, in the present embodiment, the protruding tip side of the convex lens L11 that is separated from the ink absorbing layer L2 enters the deepest portion of the recess of the concave stripe 44. Therefore, it is possible to reduce the height of the portion of the lens sheet L engaged with the engaging portion 43C.

<Fourth embodiment>
Hereinafter, a fourth embodiment of the present invention will be described with reference to FIG. The same configuration as that used in the first embodiment will be described using the same reference numerals.

In the first embodiment and the like described above, the sheet guide 40A and the like are provided on the glass plate 31 side. However, in the present embodiment, without providing a sheet guide on the glass plate 31 side,
A sheet guide 40 </ b> D is provided on the top surface 20 a adjacent to the glass plate 31.

The sheet guide 40D is provided on the front side of the top surface 20a by a technique such as adhesion or molding. Further, when the seat guide 40D is compared with the seat guide 40A in the first embodiment, only the portion provided is different, and the configuration of the seat guide 40D is the seat guide in the first embodiment described above. The same as 40A. That is, it has the board | substrate 41 (illustration omitted in FIG. 9) and the protruding item | line 42, and engaging part 43D is comprised by the whole (collection) of the some protruding item | line 42. FIG.

<Effects produced by the configuration of the fourth embodiment>
According to the above configuration, the sheet guide 40D in the present embodiment can produce the same effect as the sheet guide 40A in the first embodiment described above. In addition, the sheet guide 40D exists on the top surface 20a (corresponding to the periphery of the document table 30),
It does not exist in the glass plate 31. Therefore, in the glass plate 31, it is not necessary to reduce the reading area of the lens sheet L and other reading objects, and a sufficient area for reading can be secured.

<Fifth embodiment>
Hereinafter, a fifth embodiment of the present invention will be described with reference to FIG. The same configuration as that used in the first embodiment will be described using the same reference numerals.

In the present embodiment, a sheet guide 40 </ b> E as shown in FIG. 10 is placed on the glass plate 31. The sheet guide 40E is provided so as to cover substantially the entire surface of the glass plate 31.

As shown in FIG. 10, the sheet guide 40 </ b> E has an engaging portion 43 </ b> E and a transparent portion 45. The engaging portion 43E has the same configuration as the engaging portion 43A in the first embodiment described above, and includes a substrate 41 (not shown in FIG. 10) and a ridge 42. The transparent portion 45 is formed of a transparent film having a small thickness and a thickness. The transparent portion 45 is provided so that the light irradiated from the LED array 72 is transmitted and the light can be transmitted again after being reflected by the lens sheet L. Further, the reading portion of the lens sheet L is placed on the transparent portion 45. That is, the front side portion of the lens sheet L is engaged with the engaging portion 43 </ b> E, but the other portions of the lens sheet L are positioned above the transparent portion 45.

The engaging portion 43E is attached to the transparent portion 45 via an adhesive layer 46. The adhesive layer 46 is, for example, a double-sided tape or a predetermined adhesive (for example, a spray paste).
It is composed of Further, an adhesive layer 47 is provided on the back side of the transparent part 45 (the side where the engaging part 43E is not provided). The adhesive layer 47 is made of a material having a lower adhesiveness than the adhesive layer 46. That is, the adhesive layer 47 is made of a material that can be easily peeled off from the glass plate 31.

<Effects produced by the configuration of the fifth embodiment>
According to the above configuration, the sheet guide 40E is set so as to cover most of the glass plate 31, and at that time, the edge of the sheet guide 40E is aligned with the edge of the document table 30 (opening 32). I will let you. Thereby, the convex lens L11 of the lens sheet L can be along the longitudinal direction of the convex strip 42, and the convex lens L11 can be reliably prevented from being inclined. Further, the lens sheet L can be prevented from moving in a direction (short direction) orthogonal to the long side of the convex lens L11, and when reading the lens sheet L, the lens sheet L
Can be prevented from moving in the short direction.

Further, in the sheet guide 40E in the present embodiment, it is not necessary to provide a sheet guide in advance on the glass plate 31 and the top surface 20a. In other words, the sheet guide 40E according to the present embodiment can be used as an attachment to an existing composite apparatus, scanner apparatus, or the like. Even when the resolution of the lens sheet L is changed, it is only necessary to use the sheet guide 40E corresponding to the resolution of the lens sheet L.

In this way, there is no design change or the like in the existing composite device or scanner device, and it is possible to realize the same effect as the engaging portion 43A of the first embodiment described above at low cost. . In addition, the resolution of various lens sheets L can be supported.

In addition, the height dimension of the upper surface of the transparent part 45 is not restricted to what is shown in FIG. For example, in other words, the bending (change in the height dimension) does not occur between the portion of the lens sheet L engaged with the engaging portion 43E and the portion existing in the transparent portion 45. You may make it set the height dimension of the transparent part 45 so that the lens sheet L may become flush | level.

<About modification>
Although the embodiments of the present invention have been described above, the present invention can be variously modified. Less than,
Describe that.

In each of the above-described embodiments, two or more types of engaging portions 43A having different resolutions may be provided. When configured in this way, it becomes possible to cope with a change in resolution of the lenticular lens L1.

In the above-described embodiments, the longitudinal direction of the ridges 42 or the ridges 44 is arranged along the scanning direction of the carriage 70. However, when the lens sheet L uses a type in which the length of the convex lens L11 is inclined with respect to the edge of the lens sheet L (an oblique lens sheet), etc., the lens sheet L is in the scanning direction of the carriage 70 described above. , Ridge 42
Or you may arrange | position so that the longitudinal direction of the groove 44 may incline.

In each of the above-described embodiments, the case where the composite apparatus 10 including the scanner function unit 10A and the printer function unit 10B is used has been described. However, the present invention can be applied to a scanner apparatus including only the scanner function. Of course it is possible. Further, the image reading apparatus is a composite apparatus 1.
In the example described above, the image reading apparatus may be configured by only the composite apparatus 10.

Moreover, in the engaging part 43 in each above-mentioned embodiment, the case where the protrusion 42 or the groove 44 is provided with two or more is demonstrated. However, the ridge 42 or the ridge 4
4 may adopt a configuration in which only one is provided. Further, the engaging portion 43 does not need to be provided over the entire scanning direction of the carriage 70. For example, the engaging portion 43 is provided only at both ends of the glass plate 31 in the scanning direction of the carriage 70 or intermittently at predetermined intervals. (The same applies to the top surface 20a and the sheet guide 40E in FIG. 10).

Further, the convex line 42 or the concave line 44 in the engaging portion 43 is a convex lens L1 of the lens sheet L.
1 is preferably arranged at the same pitch, but is not necessarily limited to the one arranged at the same pitch. For example, you may comprise so that it may arrange | position in the state which has an integral multiple with respect to the convex lens L11.

Further, the presser base M in the second embodiment described above is separate from the composite apparatus 10, but the document cover 60 itself may be configured to have the same function. good.
Moreover, you may make it combine the structure (holding base M) of the above-mentioned 2nd Embodiment with the 3rd-5th embodiment. Moreover, you may comprise so that the engaging part 43C of the above-mentioned 3rd Embodiment may be provided in the top | upper surface 20a like the case of the above-mentioned 4th Embodiment.

It is sectional drawing which shows the structure of the sheet guide and lens sheet of this invention. 1 is a perspective view illustrating an overall configuration of an image reading apparatus. It is a figure which shows the outline of the internal mechanism of a scanner function part. It is a block diagram which shows schematic structure of a composite apparatus. It is a perspective view which shows the structure of the seed guide of 1st Embodiment. It is a figure which shows the side shape of the sheet | seat guide of FIG. It is a perspective view which shows the press stand etc. which concern on 2nd Embodiment. It is a perspective view which shows the structure of the sheet guide which concerns on 3rd Embodiment. It is a perspective view which shows the structure of the sheet guide which concerns on 4th Embodiment. It is a perspective view which shows the structure of the sheet | seat guide which concerns on 5th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Composite apparatus, 10A ... Scanner function part, 10B ... Printer function part, 20 ... Case, 2
0a ... Top (corresponding to the periphery of the document table), 30 ... Document table, 31 ... Glass plate, 40A, 40C,
40D, 40E ... sheet guide, 41 ... substrate, 42 ... ridge, 43A, 43C, 43D, 4
3E ... engaging portion, 44 ... concave line, 45 ... transparent portion, 60 ... document cover, 70 ... carriage, 12
0 ... Control unit, PC ... Computer, L ... Lens sheet, L1 ... Lenticular lens, L
11: Convex lens, M: Presser base (corresponding to presser member)

Claims (8)

An image reading apparatus that reads a lens sheet by placing a lens sheet having a plurality of lenses with one direction as a longitudinal axis on a document table,
An image reading apparatus comprising: a sheet guide having an engaging portion that engages with the lens in order to prevent a positional deviation of the lens sheet on the document table. The image reading apparatus according to claim 1, wherein the engaging portion is provided on a side of the glass plate of the document table that is separated from a pivot base portion of the document cover. The engaging portion has a long and convex ridge, and the ridge is arranged at the same pitch as the lens is arranged. The image reading apparatus according to claim 1 or 2. The engaging portion has a long and concave groove, and the groove is arranged at the same pitch as the lens is arranged. The image reading apparatus according to claim 1 or 2. 5. The image reading apparatus according to claim 3, wherein the engaging portion is provided at a peripheral edge of the document table, which is a portion where the reading of the lens sheet is not performed. 2. The sheet guide includes a transparent portion that is continuous with the engaging portion and capable of transmitting light, and the lens sheet is read through the transparent portion.
5. The image reading device according to any one of items 1 to 4. The image reading apparatus according to claim 6, wherein the sheet guide is fixed to the glass plate via an adhesive layer. The image reading apparatus according to claim 1, wherein a pressing member is disposed on an upper portion of a portion where the lens is engaged with the engaging portion.

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