JP4569793B2 - Film scanner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, while a developed photographic film is conveyed in the longitudinal direction by a conveying means, a light beam from a light source is transmitted to a frame image of the photographic film, and image information contained in the transmitted light is captured by a digital signal. More particularly, the present invention relates to an improvement in a roller for conveying a photographic film.
[0002]
[Prior art]
As the film scanner configured as described above, there are those shown in Japanese Patent Laid-Open Nos. 9-120106 and 2000-66304. These conventional techniques include a roller that sandwiches a photographic film and applies a conveying force to the film. Further, this roller is arranged so as to sandwich an outer portion (hereinafter referred to as a side position) in the width direction of the film from the frame image formed on the photographic film.
[0003]
[Problems to be solved by the invention]
Here, considering the operation when scanning frame image information of 35 mm (135 size) film as a photographic film, the photographic film is transported in the sub-scanning direction at a set speed during scanning, and at a timing synchronized with this transport speed. When the image information is captured in a line along the main scanning direction, the side position of the photographic film is sandwiched between rollers and transported as in the prior art. Each time the roller reaches perforation, the roller falls into the perforation, causing the photographic film to vibrate slightly, causing unevenness in the film transport speed, or causing the photoelectric conversion means to vibrate, and as a result, There is room for improvement in terms of reducing image quality. This inconvenience occurs even when the number of perforations is small compared to a 35 mm film such as an APS film.
[0004]
An object of the present invention is to rationally constitute a film scanner capable of capturing good image information while sandwiching and feeding a photographic film with a roller.
[0005]
[Means for Solving the Problems]
The features, functions and effects of the film scanner according to claim 1 of the present invention are as follows.
〔Characteristic〕
Photoelectric conversion that transmits the light from the light source to the frame image of the photographic film while conveying the developed photographic film in the longitudinal direction by a conveying means, and takes the image information contained in the transmitted light and converts it into a digital signal In the film scanner having the above-mentioned means, the transporting means includes a driving roller and a pressure roller that sandwich the outer side of the film from the area where the frame image is formed, and transports the photographic film by the driving force of the driving roller. The conveyance mode is set so as to perform the above operation, and the pressure roller is provided with a pressure-bonding peripheral portion for pressure-bonding at a position avoiding perforation formed on the photographic film.
[0006]
[Action / Effect]
According to the above feature, when the image information of the developed photographic film is converted into a digital signal and taken in by the photoelectric conversion means, the photographic film is sandwiched between the driving roller and the pressure roller, and the pressure roller is used for the conveyance. Because the pressure-bonding roller is pressed to a position where perforation is avoided, the pressure-rolling roller does not drop into the perforation, and the transfer speed variation caused by slight vibration of the photographic film and vibration from the transfer system are transmitted to the photoelectric conversion means. It does not cause a phenomenon. As a result, a film scanner that can smoothly capture photographic film and capture images with good image quality has been rationally constructed.
[0007]
The characteristics, operation and effect of the film scanner according to claim 2 of the present invention are as follows.
〔Characteristic〕
2. The film scanner according to claim 1, wherein the pressure roller is composed of a rotating body that is loosely supported at both ends of a support shaft, and an elastically deformable resin pressure bonding member formed on an outer periphery of the rotating body. In addition, by reducing the diameter of the center position in the width direction of the crimping member, the crimping peripheral portion that crimps the perforation to a position straddling the width direction of the film is formed integrally with the crimping member.
[0008]
[Action / Effect]
According to the above feature, since the crimping peripheral part is pressed against the position across the perforation, the crimping peripheral part is always in contact with the smooth film surface, and it makes good use of the good aspect of conveying photographic film while suppressing vibration. At the same time, the conveying force is not reduced as compared with the one that presses against one side of the perforation. As a result, an image with good image quality can be taken in while smoothly transporting the photographic film without greatly reducing the transport force.
[0009]
The features, functions and effects of the third aspect of the present invention are as follows.
〔Characteristic〕
3. The film scanner according to claim 1, wherein the photoelectric conversion means includes a sensor that captures information of a frame image on a line in a direction orthogonal to the conveyance direction while conveying the photographic film at a set speed in the longitudinal direction. The drive roller is configured by covering a hard core material with an elastically deformable resin, and the drive speed of the drive roller is synchronized with the image capture timing of the sensor. There is a point.
[0010]
[Action / Effect]
According to the above characteristics, since the drive roller is made of a hard core material coated with resin, the radius of the drive roller changes greatly even when the force of pressing the photographic film between the drive roller and the pressure roller is strong. Even when the photoelectric conversion means captures frame image information in synchronization with the transport speed of the drive roller, the capture timing relative to the transport speed is not changed, and the image capture timing can be maintained in a highly accurate state. As a result, even when the pressing force between the driving roller and the pressure roller is strong, a high-quality image can be captured.
[0011]
The characteristics, operation and effect of the film scanner according to claim 4 of the present invention are as follows.
〔Characteristic〕
3. The film scanner according to claim 1, wherein the driving roller is configured by covering a hard core material with an elastically deformable resin and supplying the photographic film to the photoelectric conversion means. And the supply unit is configured to rotatably support a plurality of 135 size photographic films connected in the longitudinal direction and wound in a roll shape.
[0012]
[Action / Effect]
According to the above characteristics, since the drive roller is made of a hard core material coated with resin, the radius of the drive roller changes greatly even when the force of pressing the photographic film between the drive roller and the pressure roller is strong. Even if the photographic film has a structure in which a plurality of 135 size photographic films are connected in the longitudinal direction and rolled up in a roll shape, the photographic film is drawn out and scanned. The carry amount is not changed. As a result, it was possible to reliably convey photographic film with a strong force and capture high-quality images.
[0013]
The characteristics, operation and effect of the film scanner according to claim 5 of the present invention are as follows.
〔Characteristic〕
The film scanner according to claim 3 or 4, wherein the driving roller is formed by coating the core material with a resin material having a thickness of 0.5 to 1.0 mm, and the pressure roller is provided on a support shaft as a pair. The force acting on the support shaft in the pressure-bonding direction is set to 4.6 to 8.6 N.
[0014]
[Action / Effect]
According to the above feature, the force acting on the support shaft supporting the pair of pressure-bonding rollers is set to 4.6 to 8.6 N in a state where the thickness of the resin with respect to the core material is 0.5 to 1.0 mm. By doing so, it can be seen that the photographic film can be transported satisfactorily without causing uneven transport as shown in the table of FIG. As a result, a photographic film can be conveyed at a constant speed and a good image can be captured only by setting the thickness of the resin and setting the pressure-bonding force.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a film supply unit A that stores a developed 35 mm (135 size) photographic film 1 in a roll shape connected in a longitudinal direction with a splice tape (not shown); The film scanner B that obtains the digital image by converting the frame image information of the photographic film 1 sent from the film supply unit A and the photographic film 1 that has been scanned by the film scanner B are sent in a loop. A photographic processing apparatus is provided with a loop forming section C and an enveloper E that cuts the photographic film 1 sent through the loop forming section C into a set number of frames and inserts it into the film storage sheet 2. It is configured.
[0016]
The film supply section A is provided with a film reel 3 that rotatably supports a photographic film 1 that is elongated by being connected with a splice tape, and the photographic film 1 fed out from the film reel 3 is ordered. A first cutter 4 for cutting and a plurality of transport rollers 5 for sandwiching and transporting the photographic film 1 cut by the first cutter 4 are provided.
[0017]
The film scanner B transmits the light emitted from the LED type light source L1 to the vicinity of the perforation 1P (see FIG. 2) of the photographic film 1 and optically reads the DX code formed in this portion. And a DX lamp sensor S1 for adjusting the color distribution of a light beam from a halogen lamp 7 disposed in a lamp house for supplying a sensing light beam and a halogen lamp 7 as a light source. It has an optical filter 8 and a mirror tunnel 9 for adjusting the intensity distribution of the light beam. Further, this film scanner B has a conveying means F for conveying the photographic film 1 in the longitudinal direction, and, as a sensing system, the image information contained in the light beam transmitted through the frame image of the photographic film 1 sent by the conveying means F. Taken out by the optical lens 10, reflected by the mirror 11, imaged on three CCD type line sensors 12 (an example of photoelectric conversion means) assigned to the three primary colors of R, G, and B, and photoelectric conversion by the line sensors 12 respectively. And a system for outputting a digital signal having a predetermined number of bits and outputting the digital signal, and a sandwich-type transport roller 13 for feeding the photographic film 1 that has been scanned.
[0018]
In the photographic processing device, the transport speed when scanning the photographic film 1 with the film scanner B can be adjusted in the range of 3 to 40 mm / second according to the resolution, and this scanning converts it into a digital signal. A hard disk, a semiconductor memory, etc. (not shown) for storing the image information of each of R, G, and B are provided. Also, image information stored in the hard disk, semiconductor memory, etc. is managed in units of orders. When printing this image information with a silver halide printer, image frames out of the image information managed in units of orders. R, G, and B image information corresponding to is read out and transferred to an exposure head of a printer (not shown) for exposure.
[0019]
The loop forming unit C includes transport rollers 15 and 15 disposed at a transport upper position and a transport lower position of the loop forming unit C so as to transport the photographic film 1 in a sandwiched state, and the transport rollers 15 and 15. The photographic film 1 to be conveyed is configured to include a pair of guide mechanisms 16 having idle-type rollers at the end position so as to send the photographic film 1 from the linear conveyance path to the loop forming side. The photographic film 1 sent to this part is sent out to the “U” -shaped path by contact with the roller of the guide mechanism 16.
[0020]
The enveloper E includes a supply mechanism 18 that supplies the film storage sheet 2 wound up in a roll shape, and an end portion of the photographic film 1 with respect to a pocket portion of the film storage sheet 2 supplied by the supply mechanism 18. The boundary position of the frame image of the photographic film 1, the inserter having a plurality of conveyance rollers 19 of the nipping and conveying type, the second cutter 20 that cuts the photographic film 1 by the set number of frames A boundary sensor S2 for determining the boundary position between adjacent frame images by transmitting the light beam emitted from the LED type light source L2 through the photographic film so as to be determined.
[0021]
Although not shown in the drawing, this photographic processing apparatus is provided with an electric motor for driving the respective conveying rollers 5, 13, 15 and an electric actuator for driving the first and second cutters 4, 20, and a conveying means F. And an electric motor (described later) for driving the motor, and a control device for controlling them. Therefore, when processing the photographic film 1, the photographic film 1 is lengthened by joining with a splice tape, set on the film reel 3, and the processing is started so that the photographic film 1 is sent to the scanner B. The DX code sensor S1 discriminates the front and back of the photographic film 1 from the DX code of the photographic film 1, scans if it is appropriate, outputs an error if the front and back are reversed, and stops processing. To do. At the time of scanning, the photographic film 1 is cut in order units by the first cutter 4 and scanned by the film scanner B while being fed in the sub-scanning direction at a constant speed by the conveying means F, and the frame image of the photographic film 1 is scanned. Is scanned in the main scanning direction and converted into a digital signal. Furthermore, even if the photographic film 1 after the image is taken in by scanning in this way is sent to the loop-shaped portion C in a route detoured in a loop shape, even if it is intermittently conveyed by the developer E, This avoids a phenomenon in which an excessive tension is applied to the photographic film 1 or an abnormal conveying posture of the photographic film 1. Further, the developer E discriminates the boundary position of the image frame by the boundary sensor S2. Thus, the number of frames of the image frame is counted, the boundary position of the image frame is determined, and the second cutter 20 cuts it to a predetermined number of frames, which can be completely inserted into the pocket portion of the film storage sheet 2 It has become.
[0022]
The above processing is basically the same as a conventional photographic processing apparatus, and the present invention is characterized by the conveying means F of the film scanner B.
[0023]
That is, as shown in FIG. 2 to FIG. 5, the conveying means F is configured such that the film outer side portions (perforation 1P is formed in the width direction of the film with reference to the image area PE where the frame image of the photographic film 1 is formed. A transport roller pair composed of a drive roller DR disposed in the vicinity of the region) and a pressure roller PR disposed in a position opposite to the drive roller DR, and a transport upper position and a lower position relative to the scanning position SE. And a stepping motor type transport motor M that drives the respective drive rollers DR in synchronization with each other.
[0024]
The drive roller DR is against the wheel-shaped core member 24 made of metal such as aluminum or iron fixed to both ends of the drive shaft 23 in a posture orthogonal to the conveyance direction of the photographic film 1 and parallel to the photographic film surface. A resin material made of elastically deformable urethane rubber, NBR, or the like is coated so that the diameter D is 10 to 12 mm as a whole. Specifically, the hardness of the resin material is set to 50 to 70 ° (JIS-K6301), and the thickness T of the resin material 25 to be coated is 0.5 mm (0.5 to 1.0 mm is a practical range). The width W of the drive roller DR in the direction along the drive shaft 23 is formed by using a mold so that the outer end portion of the photographic film 1 in the width direction from the vicinity of the image region P of the photographic film 1 is formed. It is comprised so that it may become a value over.
[0025]
A transmission system in which a driving force from the transport motor M is input to the input pulley 26 provided on one drive shaft 23 via the timing belt 27 is formed, and the drive shafts 23 and 23 are provided. By winding the timing belt 29 around the interlocking pulleys 28, 28, the driving rollers DR, DR can be driven in an interlocking state by the driving force from the transport motor M.
[0026]
The pressure roller PR is provided on the outer periphery of each of the rotating bodies 34, which are loosely supported in a ball bearing form via a plurality of balls 33 with respect to both ends of the support shaft 32 in a posture parallel to the drive shaft 23. With the formed crimp member 35 made of a resin material such as elastically deformable urethane rubber or NBR, the diameter d is configured to be 10 to 12 mm as a whole. Specifically, the hardness of the resin material is set to 50 to 70 ° (JIS-K6301), the thickness t of the resin material 35 is set to 2.0 mm, and the center of the crimping member 35 in the width direction is set. By reducing the diameter of the position in a groove shape over the entire circumference, a pair of crimping peripheral portions 35A, 35A that contact the perforation 1P across the width direction of the photographic film 1 as shown in FIG. It is integrally formed of the same material as the crimping member 35.
[0027]
A long hole 36 that guides both ends of the support shaft 32 in the vertical direction is formed in the frame 22, and a spring 37 that generates a crimping force to the support shaft 32 is further provided. The force acting on 32 is set to 4.6 to 8.6 N, preferably 6.0 N. This numerical value is a force that acts on one support shaft 32, and a pressure that is ½ of this numerical value acts on one pressure roller PR and the driving roller DR that faces the pressure roller PR. .
[0028]
The basis of the values set in this way is as shown in FIG. That is, in the figure, the value of the thickness T of the resin material 25 coated on the driving roller DR and the shape of the resin material 35 of the pressure roller PR are different from those of a flat shape (a shape that passes through the portion of the perforation 1P). In the state where the contact shape (the shape straddling the perforation 1P) is combined as shown in the figure, the experimental result when the pressure roller PR is pressure-bonded to the driving roller DR with the pressure force shown in the table is shown. The image information at the time of scanning is indicated as ◎, ○, Δ, × in order from the highest quality image information.
[0029]
Thus, in the present invention, the driving roller DR is configured to cover the core material 24 relatively thinly with the resin material 25, and the press roller PR is avoided from being pressed against the perforation 1P, and is pressed across the perforation 1P. By setting the shape so that the pressure of the pressure roller PR is set to an optimum value based on the result of the experiment, the photographic film 1 is pulled out from a long object in which a plurality of photographic films 1 are connected by a splice tape and scanned. Even when a relatively strong traction force is required as in the case of performing the above, it is possible to perform reliable conveyance without causing slip. Further, since the driving roller DR is formed by thinly covering the resin material 25, the amount of deformation of the driving roller DR is extremely small even when the pressure roller PD is strongly pressed, and the value of the diameter D can be maintained. The accuracy of scanning timing when the line sensor 12 captures image information in synchronization with the rotation of the driving roller DR is maintained high. In addition, the pressure roller PR is pressure-bonded to a position that avoids the perforation 1P, so that fine vibration during scanning can be avoided and high-quality image information can be acquired.
[0030]
[Another embodiment]
In the present invention, in addition to the above embodiment, for example, one pressure roller PR is suitable for scanning image information of a photographic film in which perforation is formed only at one end in the width direction such as an APS film. It is possible to carry out the process only by forming a crimping peripheral part only, and as shown in FIG. 7, the crimping peripheral part 35A is not shaped to straddle the perforation 1P, but is crimped to one side of the perforation 1P. It is also possible to carry out by forming the crimping peripheral portion 35A (the components having the same functions as those in the above embodiment are given the same numbers and symbols as in the embodiment).
[0031]
In particular, in the present invention, as shown in the above-mentioned table, the thickness T of the rubber coated on the driving roller can be set to 2.0 mm, and the pressing force of the pressing roller can be set to 4.6 N. It is.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a photographic processing apparatus. FIG. 2 is a perspective view showing a configuration of a conveying means. FIG. 3 is a plan view showing an arrangement of a pressure roller and a driving roller. 5] Side view of drive roller and pressure roller [Fig. 6] List of experimental results [Fig. 7] Cross-sectional view showing another embodiment [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Photo film 1P Perforation 7 Light source 12 Photoelectric conversion means 24 Core material 32 Support shaft 34 Rotor 35 Crimping member 35A Crimping peripheral part F Conveying means DR Drive roller PR Crimp roller

Claims (5)

Photoelectric conversion that transmits the light from the light source to the frame image of the photographic film while conveying the developed photographic film in the longitudinal direction by a conveying means, and takes the image information contained in the transmitted light and converts it into a digital signal A film scanner comprising means,
The conveying means includes a driving roller and a pressure roller that sandwich the outer side of the film from the area where the frame image is formed, and a conveying mode is set so as to convey the photographic film with the driving force of the driving roller,
A film scanner, wherein the pressure roller comprises a pressure-bonding peripheral portion for pressure-bonding at a position avoiding perforation formed on the photographic film. The pressure roller is composed of a rotating body that is loosely supported on both ends of the support shaft, and an elastically deformable resin pressure bonding member formed on the outer periphery of the rotating body, and the width of the pressure bonding member. 2. The film scanner according to claim 1, wherein the crimping peripheral portion for crimping the perforation to a position straddling the width direction of the film by integrally reducing the diameter of the center position in the direction is formed integrally with the crimping member. The photoelectric conversion means includes a sensor that captures information of a frame image on a line in a direction orthogonal to the conveyance direction while conveying the photographic film in a longitudinal direction at a set speed, and the driving roller The film scanner according to claim 1 or 2, wherein the hard core material is coated with a resin that can be elastically deformed, and the driving speed of the driving roller and the image capturing timing of the sensor are synchronized. . The drive roller is configured by covering a hard core material with an elastically deformable resin, and includes a supply unit that supplies the photographic film to the photoelectric conversion means. The film scanner according to claim 1 or 2, wherein a plurality of photographic films of a size are connected in the longitudinal direction and rotatably supported in a state of being wound up in a roll shape. The driving roller is formed by coating the core material with a resin material having a thickness of 0.5 to 1.0 mm, and the pressure roller is provided with a pair of support shafts and acts on the support shaft in the press bonding direction. The film scanner according to claim 3 or 4, wherein is set to 4.6 to 8.6N.

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