JP2006215406A - Photographic film feeding device and image reader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain feeding accuracy without depending on the length of a photographic film and the kind of a feeding device. <P>SOLUTION: By grasping the present position and the target position of a photographic film and a holding state by a feeding mechanism in the case of feeding the photographic film, a correction state depending on the difference of frictional force or the like is prescribed (steps 100 to 106). A correction value is prestored corresponding to the correction state, and the number of driving pulses to be fed for actual driving is obtained from the correction value corresponding to the correction state concerning the number of driving pulses for feeding (steps 108 and 110). The obtained number of driving pulses is set as the number of driving pulses after the correction (step 112). The photographic film is fed to a target position according to the number of the driving pulses after the correction (steps 114 to 122). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a photographic film conveyance device and an image reading device, and more particularly to a photographic film conveyance device and an image reading device for conveying a photographic film to read an image recorded on a photographic film.

  When an image is read from an image frame of a photographic film by an image reading device, it is necessary to convey and position the photographic film to a reading position. For this reason, the image reading apparatus includes a film carrier, and the film carrier includes a photographic film transport device.

  Some photographic film transport devices are transported by a transport roller such as a feed roller, and the photographic film is caused by factors such as variations in the transport force of the drive transmission system that imparts the transport force of the transport roller and errors in the diameter of the transport roller. It is known that the amount of transport varies.

For this reason, in the film carrier that transports the film only by the transport roller, the correction information is stored in each carrier so that the variation of the individual transport rollers can be eliminated as a whole, and read out, thereby reading the film feed amount. Is adjusted by software (see Patent Document 1). In this technology, a photographic film is transported by a feed roller on a transport path formed on a film carrier, and the image is read by reading the correction information of the transport speed stored in the EEPROM of the film carrier, thereby transporting the photographic film. Compensates for speed errors.
JP 2002-290673 A

  However, a broni sized photographic film (hereinafter referred to as a broni film) has a large image frame size (length in the film width direction) relative to the width of the broni film, and an extremely small area outside the image frame. Therefore, in contrast to 135-size photographic film having perforation (hereinafter referred to as 135 film), the conveyance is controlled by the number of perforations from the top of the 135 film and the number of pulses sent to the pulse motor for conveyance. In film, it is necessary to carry the film using an extremely small area outside the image frame.

  However, in order to reduce the influence of film curl in the Broni film, it is conceivable that the Broni film is transported by being pressed against the transport path by the transport belt in the image reading unit. In such a case, the image reading unit performs conveyance using a conveyance belt, and other than the image reading unit, conveyance using a conveyance roller such as a roller pair is performed. Therefore, in the film carrier, the Broni film is conveyed jointly by the conveying roller and the conveying belt, or is conveyed only by the conveying roller or only the conveying belt. The length of the broni film may be a strip composed of a plurality of image frames or a single frame. In order to control the transportation of the broni film in consideration of these matters, complicated control is required.

  The present invention has been made in consideration of the above facts, and provides a photographic film transport apparatus and an image reading apparatus that can sufficiently maintain the transport accuracy without depending on the length of the photographic film and the type of the transport apparatus. The purpose is to provide.

  In order to achieve the above object, the present invention is input in a photographic film transporting apparatus that transports a photographic film along a transport path in order to read an image by irradiating the image frames recorded on the photographic film with light. A first conveying means for conveying the photographic film in accordance with a conveying instruction amount while holding at least one edge in the width direction of the photographic film intersecting with a conveying direction of the conveying path with a first frictional force; and the conveying path In the transport direction, the photographic film is provided on the downstream side and spaced apart from the first transport means, and at least one edge in the photographic film width direction is provided in accordance with the input transport instruction amount. For each of the second transport means that transports while being held with a second friction force different from the one friction force, and each of the first transport means and the second transport means, the relationship of the transport amount transported according to the transport instruction amount. Storing means as correction information, detecting means for detecting a holding state indicating that a photographic film is held or released for each of the first conveying means and the second conveying means, and the detection Based on the detection result of the means, when the photographic film is held at least one of the first conveying means and the second conveying means, the first conveying means or the second conveying means having a large frictional force against the photographic film is corrected. A setting means for setting a correction state indicating that, and when the photographic film is conveyed in a predetermined conveyance amount of the photographic film, a conveyance instruction amount corresponding to the conveyance amount is obtained, and the correction state set by the setting unit is set. The correction information of the corresponding first conveying means or the second conveying means is read, and the conveyance instruction amount obtained by correcting the conveyance instruction amount by the correction information is the first conveyance. And instructing means for outputting to each of the stages and the second conveying means, characterized by comprising a.

  According to the present invention, when the photographic film is transported along the transport path, the instruction means obtains the transport instruction amount corresponding to the transport amount for transporting the photographic film by the transport amount, and the first transport means and the second transport means are obtained. Output to the transport means. Each of the first conveying means and the second conveying means conveys while holding with different frictional forces. Therefore, the relationship of the transport amount transported by the transport instruction amount is stored as correction information in the storage unit for each of the first transport unit and the second transport unit. Further, when the photographic film is conveyed, the setting means sets the correction state according to the holding state of the photographic film detected by the detecting means. The holding state is a state representing holding or releasing of photographic film by either the first conveying unit or the second conveying unit. The correction state is a state representing that correction is performed on the first conveying unit or the second conveying unit having a large frictional force on the photographic film. The instructing means reads the correction information of the first conveying means or the second conveying means corresponding to the correction state set by the setting means, and sets the conveying instruction amount obtained by correcting the conveying instruction amount by the correction information to the first conveying means and the first conveying means. Output to each of the two conveying means. Therefore, it can correct | amend so that it may become the conveyance amount corresponding to a conveyance instruction | indication amount with respect to the conveyance means which has a large frictional force with respect to a photographic film, and is dominant about the dispersion | variation in conveyance amount.

  The first conveying means is a plurality of conveying rollers that sandwich the photographic film, and the second conveying means includes a conveying belt that continuously urges at least one surface of the photographic film. And

  The photographic film can be transported by being sandwiched between transport rollers or transported by being pressed by a transport belt. As described above, the conveyance roller and the conveyance belt have different frictional forces with respect to the photographic film, and thus the variation in the conveyance amount is also different. Therefore, even when the first transport unit is a plurality of transport rollers and the second transport unit includes a transport belt, the transport is performed with respect to the transport unit that has a large frictional force on the photographic film and is dominant with respect to variations in transport amount. Correction can be made so that the conveyance amount corresponds to the instruction amount.

  The storage means stores a plurality of correction information for each of the first conveying means and the second conveying means corresponding to the conveying direction.

  When the transport direction is reversed, the transport means generates so-called backlash. Thereby, the variation in the transport amount has a plurality of forms, a form depending on the frictional force and a form depending on the backlash. By storing correction information for each of these, it is possible to correct variations in the transport amount without depending on the form.

  The photographic film is a Broni film.

  As a photographic film, a broni film has a large image frame relative to the film width and extremely few areas outside the image frame. For this reason, since the film is transported using an extremely small area outside the image frame, the Broni film is sandwiched or pressed and transported. As a result, the variation in the transport amount may appear remarkably. Therefore, by using the present invention as a photographic film for a broni film, even when the film edge is sandwiched or pressed to be conveyed, the conveyance amount corresponding to the conveyance instruction amount is corrected. Can do.

  The photographic film transport apparatus is suitable for use in an image reading apparatus. Specifically, the image reading apparatus includes the photographic film conveying device described above and a reading unit that reads an image stored in the image frame when the image frame of the photographic film is conveyed to a predetermined reading position. Thus, it is possible to correct the conveyance means corresponding to the conveyance instruction amount with respect to the conveyance means that is dominant with respect to the variation in the conveyance amount with respect to the photographic film, so that the image frame is accurately conveyed to the reading position. be able to.

  As described above, according to the present invention, when a photographic film is conveyed, the photographic film is conveyed according to the correction information of the corresponding first conveying means or the second conveying means depending on the correction state set corresponding to the holding state of the photographic film. Since the conveyance instruction amount obtained by correcting the instruction amount is corrected, there is an effect that the photographic film can be conveyed with high accuracy.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. In this embodiment, the present invention is applied to a scanner device that reads an image from an image frame recorded on a photographic film.

  As shown in FIG. 5, the scanner device 80 includes an image pickup system including a lens unit 72 having a focus lens 72A and an image pickup element 74, a light source unit 70, and a film carrier 10 on which a photographic film F to be read is placed. I have. In the scanner device 80, the light from the light source unit 70 is irradiated on the photographic film F placed on the film carrier 10, and the light transmitted through the photographic film F is received by the imaging unit 74 such as a CCD area sensor by the lens unit 72. The image is formed on the surface. As a result, the film-transmitted light is converted into an electrical image signal by the image sensor 74 to read the image. The lens unit 72 includes a focus lens 72A for adjusting the focus imaged on the image sensor 74, and the focus adjustment on the photographic film F can be performed by moving the focus lens 72A. .

  A film carrier 10 applied to the scanner device according to the present embodiment shown in FIGS. 1 to 3 is a film carrier for a brownie film and is detachable from the scanner device 80. As shown in FIGS. 1 and 2, the film carrier 10 is provided with a base table 12 for mounting on the scanner device 80. An image reading unit 14 is provided at a substantially central portion of the base 12 as a region for reading an image from a photographic film (Browney film) F.

  In the image reading unit 14, the light emitted from the light source unit 70 of the scanner device 80 is irradiated onto the image frame P recorded on the photographic film F. With the irradiation light, light that has passed through the photographic film F (film transmission light) is imaged on a light receiving surface of an image sensor 74 such as a CCD area sensor by the lens unit 72 of the scanner device 80. Thereby, the film transmitted light is converted into an electrical image signal by the image sensor, and the image frame P is read as an image. Further, a film transport path R for transporting the photographic film F to the image reading section 14 is formed on the upper surface of the base 12 so as to extend along the width direction of the apparatus (the direction of the arrow W). The film transport path is schematically indicated by an arrow R in the figure.

  As shown in FIG. 2, the image reading unit 14 is formed with a rectangular window 16 having the longitudinal direction in the apparatus width direction, and the photographic film F conveyed to the image reading unit 14 is formed in the window 16. A base plate 18 for setting the photographic film F is fitted at a reference position along the light irradiation direction (see the optical axis L in FIG. 4B).

  The base plate 18 is formed of a transparent glass plate. As shown in FIG. 3, on the upper surface of the base plate 18, there is a film transport direction (in the direction of arrow A) at a portion corresponding to the image frame P of the photographic film F. ), And a pair of convex portions 22A and 22B that form the concave portion 20 are extended at both side edge portions in a direction (film width direction) orthogonal to the film conveying direction. The reference position along the light irradiation direction is constituted by the upper surfaces of the pair of convex portions 22A and 22B (image reading reference surface S). Further, the groove width dimension L1 in the direction orthogonal to the film conveyance direction of the recess 20 is set to be slightly larger than the width dimension L2 of the image frame P.

  A pair of masks 24 </ b> A and 24 </ b> B extending along a direction orthogonal to the film conveyance direction is provided on the upstream side and the downstream side of the image reading unit 14 in the film conveyance path R. The pair of masks 24A and 24B has a length dimension in a direction orthogonal to the film conveying direction slightly smaller than the groove width dimension L1 of the recess 20 of the base plate 18 (see FIG. 3). It can be moved up and down by a support mechanism (not shown) and can be moved along the film conveyance direction (in the direction of arrow W) and is attached to and held by mask holding members 26A and 26B supported so as to approach and separate from each other.

  Thereby, the masks 24A and 24B approach and separate from the base plate 18 as the mask holding members 26A and 26B move up and down (in the direction of arrow Z in FIG. 3). The masks 24A and 24B are arranged at a predetermined distance from the base plate 18 when the mask holding members 26A and 26B are raised, and when the mask holding members 26A and 26B are lowered to a predetermined position, the image reading reference plane It is configured to stop at a predetermined position substantially coincident with S.

  A pair of pressing pins 80 projecting downward are provided on the lower surface portions of the mask holding members 26A and 26B in the vicinity of both side end portions in the film width direction. As shown in FIG. 1, a rack 30 extending along the film transport direction is connected to one end of the mask holding members 26A and 26B, and a stepping motor is connected to the rack gear 32 of the rack 30. The drive gear 36 of the mask moving motor 34 is engaged. As a result, when the mask moving motor 34 rotates the drive gear 36, the rack 30 moves along the film conveyance direction, and the mask holding members 26A and 26B move along the film conveyance direction as the rack 30 moves. While approaching and separating from each other, the mask position by the masks 24A and 24B is changed. The displacement of the masks 24A and 24B can cope with the change of the image frame size in the transport direction of the photographic film F.

  A pair of pressure bonding units 40A and 40B are provided on both sides of the image reading unit 14 in a direction orthogonal to the film transport direction. The pair of pressure bonding units 40A and 40B includes a pressure bonding base 42 extending along the film conveying direction. The pressure bonding base 42 is supported on the base table 12 by a support mechanism (not shown) so as to be movable up and down, and holds a mask. As the members 26A and 26B move up and down, they approach and separate from the base plate 18 (in the direction of arrow Z in FIG. 3).

  As shown in FIG. 2, a driving pulley 44, four idler pulleys 46, and a driven pulley 48 arranged along the film conveying direction are rotatably provided on the inner side surface of the crimping base 42. . An endless belt 50 is wound around the drive pulley 44, idler pulley 46, and driven pulley 48, and each belt 50 extends along the film conveyance direction. These drive pulley 44, idler pulley 46, driven pulley 48 and belt 50 form a transport belt mechanism 51. Further, as shown in FIG. 3, each belt 50 is disposed to face the convex portions 22A and 22B provided on the upper surface of the base plate 18, and the lower surface of the belt is spaced from the convex portions 22A and 22B by a predetermined distance. (Gap) is adjusted.

  As shown in FIG. 4, an inclined surface portion 78 that is located above the belt 50 and extends substantially parallel to the belt 50 is provided on the upper portion of the crimping base 42. As shown in FIG. 3, the mask holding members 26 </ b> A and 26 </ b> B are disposed below the pair of pressing pins 80 provided on the lower surface portions.

  Further, the transport units 40A and 40B are configured so that the inclined surface portions 78 are pressed against the tip portions of the pair of pressing pins 80 when the mask holding members 26A and 26B are lowered, so that the distance between the belts 50 is increased. When the belt 50 is moved, the mask holding members 26A and 26B are lifted from the state, and the pressing of the inclined surface portions 78 by the pair of pressing pins 80 is released, the belts 50 are returned to their original intervals. 50 is configured to move inward. Further, the moving operation for widening the belt interval is performed after the masks 24A and 24B are lowered as the mask holding members 26A and 26B are lowered and stopped at the predetermined positions described above.

  As shown in FIG. 2, rotary drive shafts 52A and 52B are connected to the drive pulleys 44 of the crimping units 40A and 40B. The belts 50 of the crimping units 40A and 40B are rotated by the drive pulleys 44 and rotated in a predetermined direction by the rotation drive shafts 52A and 52B being rotated in synchronization by a belt drive motor (not shown). Moving.

  As shown in FIG. 1, a pair of eccentric cams 54 </ b> A and 54 </ b> B are arranged on the outer sides of the crimping units 40 </ b> A and 40 </ b> B in a direction orthogonal to the film transport direction. Both ends of the pair of eccentric cams 54A and 54B are rotatably supported by the pair of bearing portions 56A and 56B. As shown in FIG. 3, the cam portions 58A and 58B are connected to the mask holding member 26A, It abuts against pressing surface portions 60 formed on both sides of the upper surface of 26B.

  Timing pulleys 62A and 62B are attached to the tip ends of the eccentric cams 54A and 54B. A single endless timing belt 64 is wound between the timing pulleys 62A and 62B and a driving pulley 67 of a crimping motor 66 formed of a stepping motor. As a result, when the crimping motor 66 is actuated to rotationally drive the drive pulley 67, the rotational driving force is transmitted to the timing pulleys 62A and 62B via the timing belt 64, and the eccentric cams 54A and 54B rotate in synchronization. Then, the cam surfaces of the cam portions 58A and 58B are moved up and down. The mask holding members 26A and 26B are lowered when the pressing surface portion 60 is pressed by the cam portions 58A and 58B of the eccentric cams 54A and 54B, and approach the base plate 18, and also by the cam portions 58A and 58B. When the pressure is released, the pressure is raised by a spring force of a spring member (not shown) provided in the support mechanism and separated from the base plate 18.

  Next, the operation outline of the scanner device 80 will be mainly described with respect to the operation outline of the film carrier 10 of the present embodiment configured as described above.

  In the film carrier 10 of the present embodiment, the masks 24A and 24B are separated from the base plate 18 and release the pressing of the photographic film F. By the relative movement of the mask holding members 26A and 26B driven by the mask moving motor 34, According to the size of the image frame P, they are moved toward and away from each other along the film conveyance direction, and are arranged at predetermined mask positions. The displacement of the masks 24A and 24B can cope with the change of the image frame size in the transport direction without damaging the photographic film F.

  In addition, the belts 50 of the transport units 40A and 40B arranged at predetermined intervals with respect to the convex portions 22A and 22B of the base plate 18 are in pressure contact with both edges FB in the width direction on the surface of the photographic film F. By rotating and moving, the photographic film F is transported along the film transport path R provided on the upper surface portion of the base table 12, and when stopped by the image reading section 14 as shown in FIG. The pressure holding motor 66 is driven and the mask holding members 26A and 26B are lowered.

  As the mask holding members 26A and 26B are lowered, both edges FA in the transport direction on the film surface are pressed by the pair of masks 24A and 24B moved in a direction approaching the base plate 18 (see FIG. 1). In addition, the belts 50 of the transport units 40A and 40B are spread in the width direction as the mask holding members 26A and 26B are lowered while being pressed against both edge portions FB in the width direction on the film surface. ), The photographic film F is set in the image reading unit 14 with both edge portions FB sandwiched between the belts 50 and the convex portions 22A and 22B of the base plate 18.

  In this state, the image frame P recorded on the photographic film F is irradiated with light (arrow LT in FIG. 4B) emitted from the light source unit of the scanner device through the base plate 18, and this image frame is irradiated. Light that has passed through P (transmitted light) is imaged on the light receiving surface of the image sensor by the lens unit of the scanner device. Thereby, the film transmitted light is converted into an electrical image signal by the image pickup device and read as an image.

  The ridge-shaped curl having a curvature in the film width direction generated in the photographic film F is reduced by pressing both edges FA in the film transport direction with the masks 24A and 24B, and further, both edges in the film width direction. The belts 50 of the transport units 40A and 40B that are in pressure contact with the part FB are expanded in the width direction and are further reduced by being pulled in the width direction. Therefore, even a large curl can be reliably suppressed, and the flatness of the photographic film F can be improved.

  Further, the saddle-shaped curl generated in the photographic film F has both edges FA in the film transport direction before the both edges FB in the film width direction are pulled in the width direction by the belts 50 of the transport units 40A and 40B. Is greatly reduced by being pressed by the masks 24A and 24B. Thus, curling can be more reliably suppressed by greatly reducing the hook-shaped curl and then spreading the belts 50 of the transport units 40A and 40B in the width direction and pulling the photographic film F in the width direction. The planarity of the photographic film F can be further improved.

  Further, since the photographic film F conveyed to the image reading unit 14 along the film conveyance path R is conveyed by the belts 50 provided to the conveyance units 40A and 40B so as to be rotationally movable along the conveyance direction, 1 Even a short photographic film cut into frames or a plurality of frames can be automatically conveyed. Further, in the case of such a belt 50, since the outer peripheral surface of the belt is in contact with the edge portion FB when the belt 50 is crimped to the edge portion FB, the force that spreads in the width direction acts on the edge portion FB almost evenly. Thus, the flatness of the photographic film F can be kept good without curling partially remaining.

  In addition, when targeting a brownie film (2B) like the film carrier 10 of this embodiment, since the non-image part provided in the film end of the brownie film is about 2 mm, the width | variety of the belt 50 is 2 mm or less. It is desirable to make it. Further, in the case of such a belt conveyance system, in order to stably convey the photographic film, the friction force generated between the base plate 18 and the photographic film F is larger than the friction force generated between the belt 50 and the photographic film F. It is necessary to increase the generated frictional force. Therefore, if the material of the base plate 18 is glass or the like, the material of the belt 50 is preferably urethane rubber or the like.

  Further, it is desirable to provide a gap (for example, 0.05 to 0.1 mm) equal to or less than the film thickness between the belt 50 and the base plate 18 (the convex portions 22A and 22B). This prevents the belt 50 from being rubbed against the base plate 18 when the photographic film is not being transported, thereby preventing a decrease in film transport stability and a decrease in durability of the belt 50 caused by a decrease in the frictional force of the belt 50. it can.

  Further, when a pair of conveyance rollers including, for example, the first conveyance roller 76A to the third conveyance roller 76C (see FIG. 7) is provided in a portion other than the belt in the film conveyance path R, the material of each roller is urethane rubber or the like. , At least one of the two rollers is configured to be pressed against the other with a spring or the like.

  Next, the schematic configuration around the image reading unit 14 in the film transport path R through which the photographic film F that is each of various types of Broni film is transported will be further described with reference to FIGS. 6 and 7.

  As shown in FIG. 6, in order to transport the photographic film F on the transport path R, a first transport roller 76A, a second transport roller 76B, a transport belt mechanism 51, and a third transport roller 76C are provided. Yes. The photographic film F is transported by each transport force in the order of the first transport roller 76A, the second transport roller 76B, the transport belt mechanism 51, and the third transport roller 76C.

  Note that any one of the first conveyance roller 76A, the second conveyance roller 76B, and the third conveyance roller 76C of the present embodiment corresponds to the first conveyance unit of the present invention, and the conveyance belt mechanism 51 corresponds to the second conveyance unit. To do. In particular, it is most preferable that the second conveyance roller 76B corresponds to the first conveyance unit of the present invention.

  A loading detection sensor 92A for detecting the start of conveyance of the photographic film to the film carrier 10 is provided upstream of the first conveyance roller 76A in the photographic film F conveyance direction, and the third conveyance roller 76C is downstream in the photographic film F conveyance direction. Is provided with a discharge detection sensor 92C for detecting discharge of the photographic film F.

  A plurality of (six in this embodiment) screen detection sensors 98 are arranged along the width direction of the photographic film F between the first transport roller 76A and the second transport roller 76B. A check tape detection sensor 92B for detecting a check tape (such as a check tape on which the same number as the receiving bag of the photographic film F is written) is arranged upstream of the detection sensor 98 in the conveyance direction of the photographic film F.

  The screen detection sensor 98 is a sensor that detects the position of the image frame of the photographic film F, detects the amount of light transmitted through the photographic film F by the light emitted from the light source unit 70, and determines the image from the density on the photographic film F corresponding to the amount of transmitted light. Detect frame position. The screen detection sensor 98 is provided at a position 82 mm away from the reading center position CL of the image reading unit 14 on the upstream side in the photographic film F conveyance direction. This is because there are a plurality of types (6 × 4.5, 6 × 6, 6 × 7, 6 × 8, 6 × 9) with different image sizes of Broni film, and an image frame at any image size is an image reading unit. The screen detection sensor 98 is arranged at a position that does not come between frames when the reading center position CL stops at 14.

  That is, in the present embodiment, the photographic film F can be transported by either the second transport roller 76B or the third transport roller 76C, and all types including 6 × 4.5 size broni film image frames P are included. In order to make it possible to detect the image frame P, a position 82 mm upstream from the reading center position CL in the conveyance direction of the photographic film F (in the case of a 6 × 4.5 size Broni film, the second frame image from the reading center P) A screen detection sensor 98 is provided at the position of the region. Thereby, at the time of acceleration / deceleration of conveyance of the photographic film F, the screen detection sensor 98 is in a position where no frame size (image edge) is detected in any image size, and the influence due to acceleration / deceleration of conveyance of the photographic film F is eliminated. Detection by the screen detection sensor 98 is possible.

  As shown in FIG. 7, the first transport roller 76A is connected to a first transport drive motor 77A, the second transport roller 76B is connected to a second transport drive motor 77B, and the third transport roller 76C is a third transport drive motor. 77C. A belt conveyance drive motor 45 is connected to the drive pulley 44 of the conveyance belt mechanism 51. These motors (77A, 77B, 77C, 45) are connected to a controller 90 that controls the scanner device 80. Further, the screen detection sensor 98 is also connected to the controller 90. Although not shown here, other sensors are also connected to the controller 90.

The first conveying roller 76A, the second conveying roller 76B, and the third conveying roller 76C have substantially the same shape, but each roller sandwiches the photographic film F, and the rollers are rotated with respect to the photographic film F. It has a frictional force K. The first conveyance roller 76A has a frictional force Kr1, the second conveyance roller 76B has a frictional force Kr2, and the third conveyance roller 76C has a frictional force Kr3. Similarly, the conveyor belt mechanism 51 has a frictional force Kb. In addition, since the clamping force by the conveying roller is generally larger than the pressing force of the belt, in the following explanation,
Kr3 ≧ Kr1 = Kr2> Kb
The description will be made assuming that

  Next, a controller 90 that controls the scanner device 80 according to the present embodiment will be described with reference to FIG. The scanner device 80 is controlled by a controller 90 shown in FIG.

  The controller 90 includes a CPU 82A, a ROM 82B, a RAM 82C, an input / output port (I / O) 82D, and a computer 82 having a bus for exchanging data and commands between them. The I / O 82D is connected to a memory 82E that stores correction values, details of which will be described later. This memory 82E corresponds to the storage means of the present invention.

  A scanner driver 84, a film carrier driver 86, and a conveyance driver 88 are connected to the computer 82 (I / O 82D).

  The scanner driver 84 is a drive device that operates according to an instruction from the computer 82 and reads an image via the image sensor 74 or drives illumination light of the light source unit 70. For example, the scanner driver 84 converts an analog signal from the CCD control unit that controls the reading timing of the image sensor 74 according to a predetermined timing (image clock) and an analog signal from the image sensor 74 in order to drive the image sensor 74. An A / D converter is provided (not shown). Further, the scanner driver 84 has a light emission control unit that performs light emission control of the light source unit 70 in order to obtain illumination light necessary for reading an image via the image sensor 74. Therefore, the scanner driver 84 controls the reading timing of the image sensor 74 according to a predetermined timing (image clock), and controls the light emission so that the light source unit 70 emits light between the reading timings performed by the control.

  The film carrier driver 86 is a driving device for the film carrier 10 that operates in accordance with an instruction from the computer 82. For example, various motors and sensors (film carrier mechanism 11 in FIG. 8) other than the film transport are connected to the film carrier driver 86.

  The transport driver 88 is a driving device for transporting the photographic film F that operates according to instructions from the computer 82, and is connected to various motors and sensors related to film transport. The transport driver 88 includes a drive unit 87 for driving a motor. The drive unit 87 includes a first transport drive motor 77A, a second transport drive motor 77B, a third transport drive motor 77C, and a belt transport drive. The motor 45 is connected. The drive unit 87 includes a buffer memory 87A. This buffer memory 87A has the number of drive pulses supplied to the motor and the number of drive pulses corresponding to the position of the front end (or rear end) of the photographic film F with reference to the positions of the loading detection sensor 92A and the screen detection sensor 98. Is temporarily stored.

  Each of the first conveyance drive motor 77A, the second conveyance drive motor 77B, the third conveyance drive motor 77C, and the belt conveyance drive motor 45 is a motor in which a unit rotation angle is determined by one input drive pulse. For example, a pulse motor is suitable. As a result, each motor rotates by a rotation angle corresponding to the number of drive pulses, and the photographic film F is conveyed. In this embodiment, when the photographic film F is transported, the transport amount (distance) is replaced with the number of drive pulses. That is, the motor conveys the photographic film F by the unit amount by the rotation of the unit rotation angle by one drive pulse. Accordingly, the number of drive pulses can be converted from the carry amount, and the photographic film F can be carried by a desired carry amount by supplying the converted drive pulse number to the motor.

  Further, the transport driver 88 includes a key buffer 89. The key buffer 89 is connected to the input unit 13 such as a keyboard, and is a buffer memory that temporarily stores input keys by the input unit 13. That is, the input unit 13 is a key input device for instructing movement in the transport direction (arrow R direction in FIG. 1) or in the reverse direction when the operator finely adjusts the position of the photographic film F, and is not shown. When the instruction key is pressed, an instruction signal for film movement in the transport direction (in the direction of arrow R in FIG. 1) or the reverse direction of the transport corresponding to the pressed time is output to the computer 82 via the key buffer 89. At this time, the key buffer 89 temporarily stores the transport direction and the pressing time.

  In addition, a screen detection sensor 98 is connected to the I / O 82D, and other detection sensors (for example, a loading detection sensor 92A, a check tape detection sensor 92B, a discharge detection sensor 92C, etc.) 92 are connected. Detection results by the respective detection sensors are input to the computer 82, and conveyance control of the photographic film F by the computer 82 is performed based on the detection results of the respective sensors.

  Here, when the photographic film F is nipped or pressed and conveyed, the slip amount of the photographic film F changes depending on the magnitude of the frictional force K against the photographic film F. For this reason, the conveyance amount of the photographic film F actually conveyed changes with respect to the driving amount (conveyance instruction amount such as the rotation amount of the roller) when the photographic film F is nipped or pressed and conveyed.

  Therefore, in the present embodiment, when the photographic film F is transported by a predetermined transport amount, the drive pulse number converted from the unit rotation amount is corrected to the drive pulse number commensurate with the actual transport amount (details will be described later). The correction value for this correction is stored in the memory 82E in advance. The correction value is obtained from data measured by an experiment performed in advance.

  As an example of the correction value, the ratio of the actual transport amount to the converted value can be employed. The conversion transport amount of the photographic film F to be transported by a predetermined number of drive pulses is calculated in advance with reference to the case where the photographic film F and the roller are transported without being slipped when rotated by an ideal motor. The number of drive pulses required to carry the converted carry amount is measured. The ratio of the actually measured drive pulse number to the predetermined drive pulse number is obtained for each motor (first transport drive motor 77A, second transport drive motor 77B, third transport drive motor 77C, belt transport drive motor 45), and Let the ratio be the pitch correction value.

  In addition, a rotational force is transmitted by meshing with a gear or the like before being transmitted from each motor to a roller or a belt. In this meshing of gears and the like, backlash occurs as is well known. Since this backlash causes an error when the rotation direction is reversed, a reference point is provided on the photographic film F, a specific drive pulse number is supplied to the motor, and then the rotation is reversed to supply the same drive pulse number. The difference between the reference points at that time is measured. The number of drive pulses for the actually measured difference value is obtained and used as a backlash correction value for each motor.

  These pitch correction value and backlash correction value are stored in the memory 82E as correction values for each motor. In the present embodiment, for ease of explanation, the pitch correction value for the first transport roller 76A and the second transport roller 76B is “0”, the backlash correction value is Br, and the pitch correction value for the third transport roller 76C is It is assumed that “−1%” stores the backlash correction value Br, and the conveyance belt mechanism 51 stores the pitch correction value “+ 1%” and the backlash correction value Bb. That is, when the driving pulse is “1000” by the second conveying roller 76B, the conveying amount is obtained only by the driving pulse “990” when the conveying belt mechanism 51 is driven by the driving pulse, and correction of 10 driving pulses is necessary. It is shown that. Therefore, in order to obtain the same transport amount, the transport belt mechanism 51 requires “1010” drive pulses. In addition, it is preferable that the memory 82E adopts a non-volatile memory provided in advance on the film carrier 10 and stores the correction value in the non-volatile memory.

  In the present embodiment, when the photographic film F is transported, the correction state of the photographic film F at that time is specified in order to correct the error due to the frictional force K and the backlash. This correction state will be described with reference to FIGS.

  As shown in FIG. 9, the correction state changes among the correction state AT1, the correction state AT2, and the correction state AT3. That is, the photographic film F is conveyed by at least one conveyance mechanism of the first conveyance roller 76A, the second conveyance roller 76B, the third conveyance roller 76C, and the conveyance belt mechanism 51. Here, when the photographic film F is transported by a plurality of transport mechanisms, the transport force by the transport mechanism having a small frictional force K out of the plurality of transport mechanisms is surpassed by the transport force of the transport mechanism having a large frictional force K. The conveying force of the conveying mechanism having a large force K becomes dominant. Accordingly, the correction state depends on any one of the conveyance mechanisms having the largest frictional force K involving the photographic film F.

  In the present embodiment, since the frictional force K has a relationship of Kr3 ≧ Kr1 = Kr2> Kb, the correction state AT1 for the second transport roller 76B, the correction state AT2 for the transport belt mechanism 51, and the third transport roller 76C is in the correction state AT3.

  As shown in FIG. 10, the photographic film F is conveyed by any one of the second conveyance roller 76B, the conveyance belt mechanism 51, and the third conveyance roller 76C. First, when the photographic film F is transported only by the second transport roller 76B as shown in FIG. 10A, it is in the corrected state AT1, and the transport belt mechanism 51 for the photographic film F as shown in FIG. Even if the transport by is added, the correction state AT1 is maintained because the second transport roller 76B is dominant. Further, as shown in FIG. 10C, even if the conveyance of the photographic film F by the third conveyance roller 76C is added, if Kr2 = Kr3, the second conveyance roller 76B is dominant and the correction state AT1 is Maintained.

  Then, as shown in FIG. 10D, when the holding of the photographic film F by the second conveyance roller 76B is released, the conveyance by the conveyance belt mechanism 51 and the third conveyance roller 76C is carried out, but the third conveyance roller 76C dominates. Therefore, the correction state is switched to AT3. Then, the correction state AT3 is maintained until the end of the photographic film F as shown in FIG.

  Accordingly, when the length of the photographic film F is equal to or longer than the distance d1 (see FIG. 7) between the second transport roller 76B and the third transport roller 76C, the correction state changes between the correction state AT1 and the correction state AT3. Will do.

  On the other hand, when the length of the photographic film F is less than the distance d1, it may be transported by any one of the second transport roller 76B, the third transport roller 76C, and the transport belt mechanism 51.

  From the case where the photographic film F less than the distance d1 is conveyed only by the second conveyance roller 76B as shown in FIG. 11A, the conveyance by the conveyance belt mechanism 51 is added and conveyed as shown in FIG. 11B. In this case, since the second transport roller 76B is dominant, the correction state is AT1.

  As shown in FIG. 11C, when the holding of the photographic film F is released from the second conveyance roller 76B, the conveyance is performed only by the conveyance belt mechanism 51, and the state is switched to the correction state AT2. This correction state AT2 is maintained until the holding of the photographic film F by the third conveyance roller 76C is started, as shown in FIG. When the holding of the photographic film F by the third transport roller 76C is started, the state is switched to the correction state AT3. Then, as shown in FIG. 11E, the correction state AT3 is maintained while the photographic film F is held by the third conveyance roller 76C.

  Accordingly, when the length of the photographic film F is less than the distance d1, the correction state changes between the correction states AT1, AT2, AT3.

  As described above, when the driving pulse is corrected corresponding to the correction state caused by holding the photographic film F, when the photographic film F is conveyed by a predetermined conveyance amount, the conveyance amount corresponding to the maintenance is conveyed. be able to.

  Next, when the photographic film F is transported, an operation for eliminating a transport error caused by a frictional force with respect to the photographic film F will be described. In FIG. 12, the flow of the conveyance process executed by the controller 90 is shown as a flowchart.

  In this embodiment, in order to read an image from the image frame P, the image frame P is conveyed to the reading center position CL. The image frame is conveyed by a predetermined distance corresponding to the size of the image frame by detecting an edge by the screen detection sensor 98. On the other hand, a certain distance (input distance, distance obtained by various calculations, etc.) may be conveyed from the stop position of the photographic film F. Therefore, when the photographic film F is transported, the first image frame P loaded is transported to the reading center position CL, or the next image frame P is read from the state where the image frame P exists at the reading center position CL. There are positioning conveyance control for positioning from the detection position of the sensor as in the case of conveyance, and constant distance conveyance control for simply conveying the photographic film F by a certain distance.

  In the present embodiment, during positioning and conveyance control, when the image frame P (edge) is detected by the screen detection sensor 98, the processing routine of FIG. 12 is executed. On the other hand, at the time of constant distance conveyance control, the processing routine of FIG. 12 is executed at the time of conveyance instruction by the input unit 13 or the like.

  First, in step 100, the current state grasping process is executed. This current state grasping process is a process for setting the current position of the photographic film F, the target position by conveyance, and the above-described correction state.

  The current position of the photographic film F is set to “0” when the stop position where the conveyance of the photographic film F is completed last time or the position where the image frame P is detected by the screen detection sensor 98 is used as a reference.

  In this embodiment, when the leading edge (or trailing edge) of the photographic film F is detected by the loading detection sensor 92A or the screen detection sensor 98, the driving pulse for driving the first conveying roller 76A is added or subtracted to “0”. Measure using a measuring instrument such as a counter. It is assumed that a process for storing the measured value in the buffer memory 87A is performed separately. Thus, by adding or subtracting the number of drive pulses supplied to the motor in accordance with the conveyance, the position of the front end (or rear end) of the photographic film F with reference to the positions of the loading detection sensor 92A and the screen detection sensor 98. Is stored in the buffer memory 87A.

  In addition, the current position may be after fine adjustment by the input unit 13, and in order to specify a correction state to be described later, the transport direction (arrow R direction in FIG. 1) or the reverse transport direction is set as the immediately preceding transport state. It is read from the key buffer 89 that it is the stop position after conveyance.

  The target position corresponds to reading a predetermined conveyance amount when an instruction to convey the photographic film F is given to convey the photographic film F. That is, the photographic film F reaches the target position by conveying the photographic film F by the read conveyance amount. This may be performed by reading a transfer amount (transfer distance) to be transferred from a predetermined memory during the positioning transfer control or the constant distance transfer control.

  As described above, the correction state is determined by the transport mechanism (at least one of the first transport roller 76A, the second transport roller 76B, the third transport roller 76C, and the transport belt mechanism 51) that currently holds the photographic film F. Whether or not the photographic film F is held by any of the transport mechanisms is determined in advance by measuring the distance relationship between the screen detection sensor 98 and each transport mechanism, and the screen detection sensor 98 or the leading end of the photographic film F or What is necessary is just to judge in which of the above-mentioned measured distance relationships the conveyance amount after detecting the rear end. FIG. 7 shows the distances from the screen detection sensor 98 to the second conveyance roller 76B (d2), the third conveyance roller 76C (d1 + d2), the introduction portion of the conveyance belt mechanism 51 (d2 + d3), and the separation portion (d2 + d3 + d4). showed that. Instead of the screen detection sensor 98, a loading detection sensor 92A, a check tape detection sensor 92B, and a discharge detection sensor 92C may be used.

  As described above, when the transport mechanism that holds the photographic film F is determined from the position of the front end (or the rear end) of the photographic film F, any of the correction states AT1 to AT3 is set. Corrections in this correction state include pitch correction and backlash correction. Correction for the carry amount is always performed, but backlash correction is performed only when the carrying direction is reversed. Therefore, it is possible to determine whether or not the backlash correction is necessary by determining whether or not the transport direction immediately before reading from the key buffer 89 is opposite to the transport direction in the future.

  In the next step 102, the number of drive pulses corresponding to the predetermined carry amount X is obtained. For example, X / 0.159 is obtained when the carry amount by one drive pulse is 0.159 mm. In the next step 104, it is determined whether correction is necessary. This determination is made as to whether or not any one of pitch correction and backlash correction is applicable. If the result in step 104 is negative, the process proceeds to step 114, and the conveyance is started by outputting the number of drive pulses to the drive unit 87 so as to start the conveyance control as it is.

  On the other hand, if the result in step 104 is affirmative, the process proceeds to step 106 to specify a changing correction state. This process specifies that it has changed to any of the correction state transitions shown in FIG. Even in the same correction state, if either pitch correction or backlash correction is changed and necessary, it is assumed that the correction state has changed.

  In the next step 108, the number of remaining drive pulses is calculated, and in the next step 110, the correction value in the correction state specified in step 106 is calculated.

  For example, when switching from the conveyance of the second conveyance roller 76B to the conveyance of only the conveyance belt mechanism 51 (from the conveyance shown in FIG. 11B to the conveyance shown in FIG. 11C), the number of remaining drive pulses is 1000 pulses. Consider a case. In this case, the correction state AT1 is switched to the correction state AT2. Since “+ 1%” is stored as the pitch correction value in the memory 82E, in order to obtain the same transport amount, the transport belt mechanism 51 needs “1010” drive pulses. By outputting this calculated value to the drive unit 87 in the next step 112, the conveyance instruction amount (drive pulse number) is corrected.

As another example, the number of drive pulses remaining when the conveyance of only the conveyance belt mechanism 51 is switched to the conveyance of the second conveyance roller 76B (from the conveyance illustrated in FIG. 11C to the conveyance illustrated in FIG. 11D). Is 1000 pulses. In this case, the correction state AT2 is switched to the correction state AT3. Here, since the drive pulse is transported only by the transport belt mechanism 51, when the transport amount is converted, correction of “+ 1%” is performed, and therefore, the travel amount of one drive pulse is 0.159 mm. Then 1000 (pulse) x 0.159 (mm) x (1-0.01) = 157 (mm)
When converted by the pitch correction value of the third transport roller 76C,
157 (mm) / {0.159 (mm) × (1 + 0.01)} = 977 (pulse)
It becomes. By outputting this calculated value to the drive unit 87 in the next step 112, the conveyance instruction amount (drive pulse number) is corrected.

  After such correction, the conveyance is started (step 114).

  In the next step 116, the state during conveyance of the photographic film F is grasped. This process is necessary to detect that the correction state is switched between the set transport amounts. That is, the current state grasping process is executed in the same manner as in step 100 described above, and the conveyance mechanism (first conveyance roller 76A, second conveyance roller 76B, third conveyance roller 76C, conveyance belt mechanism 51) holding the photographic film F is executed. ) And the next step 118 determines whether or not the state has been switched. When the result in Step 118 is negative, the conveyance control is continued until the target position is reached (Yes at Step 120). On the other hand, if the result in step 118 is affirmative, the process returns to step 106 and the above process is repeatedly executed.

  When the photographic film F reaches the target position, the routine proceeds to step 122, where a predetermined process at the end of conveyance is executed, and this routine is terminated.

  In the process of grasping the state in step 100, the transport mechanism (first transport roller 76A) is determined from the transport amount after the leading or trailing end of the photographic film F is detected by the loading detection sensor 92A, the screen detection sensor 98, or the like. , The second conveying roller 76B, the third conveying roller 76C, or the conveying belt mechanism 51) whether the photographic film F is present, the grasping process in step 116 and the determination in step 118 are detected by the present invention. Corresponds to the function of the means. Further, the point set to any of the correction states AT1 to AT3 in step 100 and step 106 correspond to the function of the setting means of the present invention. Further, the processing of steps 108, 110, and 112 corresponds to the function of the instruction means of the present invention.

  As described above, in the present embodiment, the transport mechanism that directly contributes to transport of the photographic film F is specified, and the number of drive pulses for transport is corrected by the correction value of the transport mechanism. Can be transported. As a result, when the photographic film F is transported and stopped by the film carrier 10, any one of the photographic film F for one frame and the photographic film F in which a plurality of image frames P are stored, for example, the image reading unit 14. Thus, it is possible to accurately position the image frame at the reading center position.

  As mentioned above, although this invention was demonstrated in detail by specific embodiment mentioned above, this invention is not limited to that embodiment, Various other forms can be implemented within the scope of the present invention.

It is a perspective view which shows the external appearance of the film carrier applied to the scanner apparatus concerning embodiment of this invention. It is a perspective view which shows the external appearance of the state which removed the mask, the mask holding member, and its drive mechanism in the film carrier of FIG. It is a perspective view which shows the external appearance which looked at the principal part of the film carrier applied to the scanner apparatus concerning embodiment of this invention from the upstream of the film conveyance path. It is a figure explaining the operation | movement which suppresses the curl of the photographic film by a film carrier, (A) shows the state immediately after the photographic film which has produced the bowl-shaped curl to the image reading part, (B) is a photograph The state where the curl of the film is suppressed is shown. It is a figure which shows schematic structure of the scanner apparatus concerning embodiment of this invention. It is a schematic block diagram (plan view) around the image reading unit in a film transport path R through which a photographic film is transported. It is a schematic block diagram (side view) around the image reading unit in the film transport path R through which a photographic film is transported. It is a block diagram which shows the structure of the controller which controls the scanner apparatus concerning embodiment of this invention. It is explanatory drawing of the correction state which changes with the conveyance mechanism holding a photographic film when conveying a photographic film. It is explanatory drawing of the relationship between the conveyance mechanism and photographic film which hold | maintain a photographic film when conveying a elongate photographic film. It is explanatory drawing of the relationship between the conveyance mechanism holding a photographic film when conveying the photographic film of 1 image frame, and a photographic film. 6 is a flowchart showing a flow of a conveyance process performed by a controller of the scanner device according to the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Film carrier 76A 1st conveyance roller 76B 2nd conveyance roller 76C 3rd conveyance roller 51 Conveyance belt mechanism 80 Scanner apparatus 82 Microcomputer 82A CPU
82B ROM
82C RAM
82D I / O
90 Controller 98 Screen detection sensor F Photo film

Claims (5)

In a photographic film transport device that transports a photographic film along a transport path in order to irradiate light onto an image frame recorded on the photographic film and read an image,
First conveying means for conveying the photographic film in accordance with the inputted conveyance instruction amount while holding at least one edge in the photographic film width direction intersecting the conveying direction of the conveying path with a first frictional force;
At least one edge in the width direction of the photographic film is provided on the downstream side with respect to the first conveying means in the conveying direction of the conveying path and spaced apart from the first conveying means, and the photographic film according to the inputted conveying instruction amount A second conveying means for conveying the portion while holding the portion with a second frictional force different from the first frictional force;
A storage unit that stores, as correction information, a relationship of a conveyance amount that is conveyed by a conveyance instruction amount for each of the first conveyance unit and the second conveyance unit;
Detecting means for detecting a holding state indicating that the photographic film is held or released for each of the first conveying means and the second conveying means;
Based on the detection result of the detection means, when the photographic film is held by at least one of the first conveyance means and the second conveyance means, the first conveyance means or the second conveyance means having a large frictional force against the photographic film is corrected. Setting means for setting a correction state representing implementation;
When the photographic film is conveyed by a predetermined photographic film conveyance amount, a conveyance instruction amount corresponding to the conveyance amount is obtained, and the first conveyance unit or the second conveyance unit corresponding to the correction state set by the setting unit is obtained. An instruction unit that reads the correction information and outputs a conveyance instruction amount obtained by correcting the conveyance instruction amount based on the correction information to each of the first conveyance unit and the second conveyance unit;
A photographic film transport apparatus comprising:   The first conveying means is a plurality of conveying rollers that sandwich the photographic film, and the second conveying means includes a conveying belt that continuously urges at least one surface of the photographic film. The photographic film transport apparatus according to claim 1.   3. The photographic film transport according to claim 1, wherein the storage unit stores a plurality of correction information corresponding to a transport direction for each of the first transport unit and the second transport unit. apparatus.   4. The photographic film transport apparatus according to claim 1, wherein the photographic film is a Broni film. A photographic film transport device according to any one of claims 1 to 4,
Reading means for reading an image stored in the image frame when the image frame of the photographic film is conveyed to a predetermined reading position;
An image reading apparatus comprising:

Images