JP4123454B2 - Film transport unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a film transport comprising a film insertion section for inserting a film, a transport mechanism for transporting the inserted film along a transport path, and a film winding mechanism provided at a terminal end of the transport path. Regarding the unit.
[0002]
[Prior art]
FIG. 7 is a schematic view showing a cross section of a film transport unit (negative carrier) according to the prior art. This unit includes a film insertion portion 100 for inserting the film 1, a film transport mechanism 101 for transporting the film 1 along the transport path, and an opening 102 a for positioning an image frame on the film 1. A negative mask 102 and a film winding mechanism 103 provided at the end of the transport path are provided. The film transport mechanism 101 includes transport roller pairs 101a, 101b, and 101c along the transport path.
[0003]
The film winding mechanism 103 is provided on the downstream side in the transport direction of the pressure roller 105 by winding the film 1, the pressure drum 105 for pressure bonding to the wind drum 104, and the film drum 1 for winding the film 1. A fixed guide 106 that guides the wire to be wound around the roller, and another pressure roller 107 provided further downstream of the fixed guide 106 in the transport direction. The pressure roller 105 is supported by the lever 105b so as to be swingable around the shaft center 105a, and the pressure roller 107 is supported by the lever 107b so as to be swingable around the shaft center 107a. The pressure rollers 105 and 107 are urged so as to be pressure-bonded to the take-up drum by a spring (not shown).
[0004]
The operation of the film transport unit will be briefly described. First, the film 1 is inserted from the film insertion unit 100. The inserted film 1 is transported in the direction of arrow A by the film transport mechanism 101, the developed image frames are sequentially positioned in the opening 102a of the negative mask 102, and the image frames are read by a scanner (not shown). When the image frame is read by the scanner, it is displayed on the monitor as a simulated image frame, and the operator inputs correction information such as color and exposure time as necessary so that an appropriate image can be printed on the photographic paper. Yes.
[0005]
The film 1 that has passed through the negative mask 102 is taken up by the take-up drum 104 of the film take-up mechanism 103. When all the image frames have been read, this time, the film 1 wound on the take-up drum 104 is transported in the direction of arrow B by the film transport mechanism 101 and transported in the direction in which the film 1 is discharged from the film insertion portion 100. To do. Next, the film 1 is again conveyed in the arrow A direction. Then, the image frames of the film 1 are positioned in the opening 102a, and the image frames are sequentially printed on the photographic paper. In this printing process, an appropriate print is created in consideration of the correction information input earlier. The film 1 that has passed through the negative mask 102 is again wound around the winding drum 104. When printing exposure of all image frames is completed, the film 1 wound on the winding drum 104 is conveyed in the direction of arrow B, and the film 1 is discharged from the film insertion portion 100.
[0006]
[Problems to be solved by the invention]
According to the configuration of the conventional technology described above, the transport path is reciprocated twice until the processing of the film 1 inserted into the film transport unit is completed. If the film 1 is passed through the transport path many times, it is not preferable because it causes damage to the film 1. Further, when the film 1 is discharged from the film insertion portion 100, it is necessary to back up and discharge the film 1 after printing exposure, and the operation time for the back is wasted and the processing efficiency is lowered. .
[0007]
Further, a configuration in which a film discharge mechanism is added between the conveyance roller pair 101c and the film winding mechanism 103 is also conceivable, but this is not preferable because the structure of the film conveyance unit becomes complicated and the cost is increased.
[0008]
The present invention has been made in view of the above circumstances, and its purpose is to eliminate the waste of backing and discharging the film after printing exposure, reducing the chance of scratches on the film and improving the processing efficiency. It is to provide a film transport unit.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a film transport unit according to the present invention comprises:
A film insertion section for inserting a film, a transport mechanism for transporting the inserted film along a transport path, and a film winding mechanism provided at a terminal portion of the transport path,
The film winding mechanism includes: a winding drum that winds the film; a first pressure roller that presses the film to the winding drum and guides the film in a direction to be wound on the winding drum; crimp the winding drum, and a second press roller provided on the conveying path upstream of the first press roller and a movable member which Ru is released pressure contact between said winding drum of the first press roller comprising, in a state where the crimping state is released and the winding drum of the first press roller by the movable member, the second pressure rollers are crimped state drum the winding, these crimping state The film can be discharged out of the transport path by the cooperation of the second pressure roller and the take-up drum.
[0010]
According to this, the film inserted from the film insertion section is conveyed along the conveyance path, and is wound on the winding drum of the film winding mechanism while performing the first processing such as reading of the image frame by the scanner. To go. At this time, the first pressure roller is in a state of being pressure-bonded to the take-up drum, thereby feeding the film into the take-up drum. When all the first processing is completed, the film wound on the winding drum is back along the transport path and returned to the film insertion portion. When the film is returned, the second processing such as the image image printing process is sequentially performed.
[0011]
In performing the second process, the pressure-bonding state of the first pressure roller with the winding drum is released. As a result, the film is not wound on the winding drum. Instead, the film is discharged out of the conveyance path by the cooperation of the second pressure roller and the winding drum. That is, it is not necessary to back the film in order to discharge the film after the printing exposure, and the film after the printing process may be transported in the same direction as it is. Therefore, it is possible to eliminate the waste of backing and discharging the film after printing exposure, reducing the chance of scratches on the film, and improving the processing efficiency.
[0012]
Furthermore, since the take-up drum is used as the discharge mechanism, the structure of the discharge mechanism can be reduced without complicating the structure.
[0013]
As preferred embodiments of the present invention, the movable member, the provided on the downstream side of the transport path of the first press roller consists guide member for guiding the direction in which the film is wound on the drum the winding, The guide member is configured to be movable between a first position where the film can be guided and a second position where the film is not guided, and in conjunction with the movement of the guide member to the second position, The thing which cancels | releases crimping | compression-bonding with the said drum for winding of a 1st pressurizing roller is mention | raise | lifted.
[0014]
According to this, the guide member is provided to guide the film with respect to the take-up drum. Since the guide member is configured to release the pressure-bonded state of the first pressure roller, the mischief There is an advantage that it is not necessary to increase the number of parts.
[0015]
Specifically, a cam is integrally formed on the guide member, and the support member of the first pressure roller is lifted by the movement of the guide member to the second position. Can be given. According to this configuration, since the support shaft of the first pressure roller is used as a cam follower, there is an advantage that the configuration can be simplified.
[0016]
Other features and advantages of the present invention will become apparent from the following description of embodiments using the drawings.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
<Overall configuration of photo printing device>
FIG. 1 is a schematic diagram of the overall configuration of a photographic printing apparatus in which a negative carrier as a film transport unit is used. The photographic printing apparatus includes a printing exposure unit 10 that prints and exposes an image frame of a negative film 1 (hereinafter simply referred to as a film) onto a photographic paper 2, a development processing unit 11 that develops the exposed photographic paper 2, And a controller 12 for controlling the operation of each part of the apparatus. Connected to the controller 12 are a keyboard 13 for inputting various control instructions and a monitor 14 for displaying image frame information read by the scanner 15.
[0018]
When the film 1 to be printed is inserted into the negative carrier 16 set in the printing exposure unit 10, the image information of the film 1 is read by the scanner 15 sequentially for each frame, and the information is sent to the controller 12. The controller 12 calculates and determines the exposure condition for each image frame based on the read image information of the film 1. An image frame that will be obtained when the photographic paper 3 is exposed under the determined exposure conditions is displayed on the monitor 14 as a simulated image frame.
[0019]
If the operator of the photographic printing apparatus views the display on the monitor 14 and determines that an appropriate image cannot be obtained, the operator inputs an exposure condition correction instruction calculated from the keyboard 13. The controller 12 corrects the exposure condition based on the correction instruction and determines the final exposure condition. Based on the determined exposure conditions, the operation of each part of the printing exposure unit 10 is controlled, and the image frame of the film 1 is projected and exposed onto the photographic paper 2 drawn out from the photographic paper magazine 3.
[0020]
The photographic paper 2 on which printing exposure has been completed is conveyed to the development processing unit 11, developed, and discharged in a state of being cut one by one corresponding to each image frame on the film 1.
[0021]
<Configuration of each part of photographic printing apparatus>
Irradiation from the exposure light source 4 is caused by the negative carrier 16, the exposure light source 4, and the yellow, cyan, and magenta filters entering and exiting the exposure optical path. A dimming filter 5 that adjusts the color balance of light, a mirror tunnel 6 that uniformly mixes light whose color balance has been adjusted by the dimming filter 5, and an image frame of film 1 for printing on photographic paper 2 A lens 7, a reflection mirror 8 that guides an image frame of the film 1 in the direction of the scanner 15, a shutter 9, a conveyance roller 17 that conveys the photographic paper 2, and a motor 18 that drives the conveyance roller 17 are provided. Further, the printing lens 7 and the reflection mirror 8 constitute a single unit 19, and the entire unit 19 is configured to be movable in the direction of arrow C. When reading an image frame by the scanner 15, the unit 19 may be moved to the right side of FIG. 1 so that the reflection mirror 8 faces the optical path.
[0022]
The dimming filter 5 and the shutter 9 are controlled by the controller 12, and the position of each filter of the dimming filter 5 and the opening time of the shutter 9, that is, the exposure time are controlled based on the exposure condition finally determined by the controller 12. It has come to be. Further, the motor 18 conveys the photographic paper 2 in a frame feed state under the control of the controller 12.
[0023]
<Structure of negative carrier>
FIG. 2 is a cross-sectional view schematically showing the configuration of the negative carrier. The negative carrier 16 includes a cartridge loading unit 20, a film insertion unit 21, a film transport mechanism, a negative mask 22, and a film take-up mechanism 23 provided at the final end of the transport path. And. The cartridge loading unit 20 can be loaded with a cartridge 24 on which the film 1 is wound. Further, the naked film 1 can be directly inserted into the film insertion portion 21.
[0024]
The film transport mechanism includes drive rollers 30, 31, and 32 and pressure rollers 33, 34, and 35 for transporting the film 1. An optical sensor 36 and a magnetic head device 37 are provided on the transport path. The optical sensor 36 includes a light emitting element 36a and a light receiving element 36b, and detects optical data recorded on the film 1. The magnetic head device 37 detects magnetic data recorded on a magnetic track (not shown) of the film 1. The magnetic head device 37 is required when processing the film 1 having a magnetic track. The negative mask 22 has an opening 22 a that defines an area to be printed on the photographic paper 2 in the image frames of the film 1. The film winding mechanism 23 having a configuration unique to the present invention will be described later.
[0025]
<Detailed configuration of negative carrier>
Next, details of the negative carrier 16 will be described with reference to FIGS. The negative carrier 16 has a structure in which an upper unit 40 and a lower unit 41, which are a pair of frame bodies, are pivotally connected around an axis 42, and are biased to the open side by a torsion spring 43. FIG. 3 shows a state where the upper unit 40 and the lower unit 41 are open, and FIG. 4 shows a plan view of the lower unit 41.
[0026]
Drive rollers 30, 31, and 32 are provided on the conveyance path to convey the film 1, and a portion where the image forming surface of the film 1 passes is depressed to form a lower guide 44. Guide and support both ends in the width direction. The motor 46 drives the drive rollers 30, 31 and 32 via the belt 47.
[0027]
The lower cleaning belt 48 removes dust on the surface of the film 1 in cooperation with the upper cleaning belt 49 provided in the upper unit 40. The fan 50 blows away the removed garbage.
[0028]
The cartridge loading unit 20 includes a cartridge holder 52 that can rotate around the support shaft 51, a torsion spring 53 that urges the cartridge holder 52 in the opening direction, a claw member 54 that holds the cartridge holder 52 in a closed state, A spool support shaft 55 and a light shielding door drive shaft 56 are provided. The cartridge holder 52 is formed with a storage portion 24 a for storing the cartridge 24.
[0029]
Details of the upper unit 40 are shown in FIG. A portion where the image forming surface of the film 1 passes is depressed to form an upper guide 45, and the film 1 is guided and supported together with the lower guide 44. The pressure rollers 33, 34, and 35 are provided at positions facing the driving rollers 30, 31, and 32, respectively, in a state where the upper unit 40 and the lower unit 41 are closed. In addition, a light receiving element 36b is provided at a position facing the light emitting element 36a of the optical sensor 36.
[0030]
The upper unit 40 and the lower unit 41 are engaged by an engaging portion 57, and this engaging portion 57 is configured by a hook portion 57a provided in the lower unit 41 and a claw portion 57b provided in the upper unit 40. The
[0031]
<Configuration of film winding mechanism>
Next, the film winding mechanism 23 will be described in detail. The film take-up mechanism 23 is a first take-up drum 60 for taking up the film 1, and a first guide that guides the film 1 in a direction in which the film 1 is taken up by the take-up drum 60 by pressure bonding to the take-up drum 60. A pressure roller 61, a second pressure roller 62 provided immediately upstream of the conveyance path of the first pressure roller 61, a movable guide member 63 provided downstream of the first pressure roller 61, and a fixed guide member 64 And a third pressure roller 65 that is provided in the innermost part of the transport path and presses against the winding drum 60.
[0032]
Four first pressure rollers 61 are arranged along the conveyance width direction, and are rotatably supported by a support lever 67 so as to be swingable around a support shaft 66. The support lever 67 urges the support shaft 66 counterclockwise by a spring (not shown). As a result, the first pressure roller 61 is pressed against the take-up drum 60. Support shafts 62 a are provided at both ends of the second pressure roller 62 in the conveyance width direction and are rotatably supported by a shaft support 68. The shaft support 68 also supports the support shaft 66. Further, the second pressure roller 62 is always in pressure contact with the winding drum 60 by a spring (not shown). Further, a groove 67 a is formed in the support lever 67 so as not to interfere with the support shaft 62 a of the second pressure roller 62.
[0033]
The movable guide member 63 is supported by the fixed guide member 64 so as to be swingable around the support shaft 69, and a cam portion 63a and a guide surface 63b are formed. The cam portions 63a are formed at both ends in the transport width direction, and are configured to be engageable with support shafts 61a formed at both ends in the transport width direction of the first pressure roller 61. The movable guide member 63 is moved by the motor or solenoid 72 between the position shown in FIG. 2 and the position where the cam portion 63a lifts the support shaft 61a by rotating slightly clockwise from the position shown in FIG. It is configured to be possible. The guide surface 63 b is formed in a circular arc surface concentric with the outer peripheral surface of the winding drum 60.
[0034]
The fixed guide member 64 is formed with a guide surface 64a for guiding the film 1 and is formed in an arc surface continuous with the guide surface 63b. Four third pressure rollers 65 are provided in the conveyance width direction, and are supported by the support lever 71 so as to be rotatable around the support shaft 70. The support lever 71 urges the support shaft 70 counterclockwise by a spring (not shown). As a result, the third pressure roller 65 is in a state of being pressure-bonded to the winding drum 60. The support lever 71 is also provided with a guide surface 71a, which is formed on the same arc surface as the guide surfaces 63b and 64a already described.
[0035]
<Drum driving mechanism>
FIG. 5 is a view for explaining the drive mechanism of the winding drum 60. The drive mechanism includes a first bevel gear 81 provided at one end of a connecting shaft 80 of the driving roller 30, a second bevel gear 82 that meshes with the first bevel gear 81, and a second bevel gear 82 that is connected to the connecting shaft 84 by a connecting shaft 84. A third bevel gear 83, a fourth bevel gear 85 meshing with the third bevel gear 83, a first flat gear 86 integrally formed with the fourth bevel gear 85, a second flat gear 87 meshing with the first flat gear 86, and a second flat gear A friction clutch 89 that connects the gear 87 and the drum rotation shaft 88 and a one-way clutch 90 that connects the winding drum 60 and the drum rotation shaft 88 are provided. Both ends of the connecting shaft 80 are held by a pair of bearings 91 and 91. Since the driving roller 30 is driven by the motor 46 shown in FIG. 3, the winding drum 60 is also driven by the motor 46.
[0036]
In order to wind the film 1 around the take-up drum 60 without slack, the take-up length per unit time by the take-up drum 60 is larger than the feed length per unit time by the drive roller 30 (this is the take-up length). It is necessary to set so as to increase. A friction clutch 89 is provided to absorb the difference between the winding length and the feeding length. Further, when the film 1 wound around the winding drum 60 is unwound and returned, the winding drum 60 needs to be free. For this purpose, a one-way clutch 90 is provided.
[0037]
<Operation explanation of negative carrier>
First, the bare film 1 is inserted into the film insertion portion 21 in FIG. The inserted film 1 is sent to the conveyance path in the direction of arrow A. The conveyance is performed by driving rollers 30, 31, and 32. Data recorded on the film 1 is read by an optical sensor 36 and a magnetic head device 37 provided in the transport path. Next, each image frame on the film 1 is positioned at the opening 22 a of the negative mask 22, and information on the image frame is sequentially read by the scanner 15. At this time, the reflecting mirror 8 shown in FIG. 1 enters the optical path, thereby enabling reading of image information.
[0038]
Each time reading by the scanner 15 is performed, the film 1 is sequentially sent to the take-up mechanism 23 and taken up by the take-up drum 60. The first pressure roller 61 is in a state of being pressure-bonded to the take-up drum 60, and the film 1 is forcibly taken up by the take-up drum 60.
[0039]
When the reading of all the image frames on the film 1 is completed, the film 1 is now conveyed back in the reverse direction (arrow B direction). This conveyance is also performed by the drive rollers 30, 31, and 32. At this time, the winding drum 60 rotates freely by the action of the one-way clutch 90. Therefore, the conveyance is performed smoothly. The reversely fed film 1 is discharged from the film insertion portion 21.
[0040]
When the discharging operation of the film 1 is completed, the film 1 is again conveyed in the direction of arrow A. At this time, the film winding mechanism 23 is in the state shown in FIG. That is, the movable guide member 63 is slightly rotated clockwise (arrow D) by the motor 72. Accordingly, the cam portion 63a acts to lift the support shaft 61a of the first pressure roller 61. As a result, the first pressure roller 61 rotates around the support shaft 66 in the clockwise direction (arrow E). Thereby, the first pressure roller 61 is released from the pressure contact state with the winding drum 60. The second pressure roller 62 is in a pressure-bonded state with the winding drum 60.
[0041]
Now, the film 1 sent out in the A direction again is positioned at the opening 22a of the negative mask 22, and the image frames are printed in sequence. At this time, the printing lens 7 has entered the optical path. Then, the film 1 conveyed to the film winding mechanism 23 is sandwiched between the second pressure roller 62 and the winding drum 60 and is discharged out of the negative carrier 16 as it is (FIG. 6). The discharge speed when the film 1 is discharged is determined by the feed speed of the drive roller 30. However, when the rear end of the film 1 is separated from the driving roller 30, it is determined by the feeding speed of the winding drum 60. Since the feeding speed by the winding drum 60 is set to be higher than that of the driving roller 30, in this case, the film 1 is discharged at a high speed.
[0042]
As described above, after the film 1 that has undergone printing exposure has been taken up on the take-up drum 60, it is not necessary to back up and discharge the film 1 by transporting the film 1 in the same direction as it is after printing exposure has been completed. The film 1 can be discharged. That is, since the film 1 is not taken up by the take-up drum 60 in order to discharge the film 1, the opportunity to bend and convey the film 1 can be reduced, and therefore, the chance of scratches can be reduced. Further, in FIG. 7 of the prior art, the film 1 reciprocates twice in the conveyance path, but in the present invention, it takes only one reciprocal half. Also in this respect, the chance of scratches on the film 1 can be reduced.
[0043]
<Modification>
In this embodiment, the case where the bare film 1 is processed has been described. However, when the film 1 containing a cartridge is processed, a mechanism for releasing the engagement between the rear end of the film 1 and the spool in the cartridge is provided. Thus, it can be discharged from the negative carrier 16 in the same manner as the bare film 1.
[0044]
In the embodiment shown in FIG. 3, the cartridge loading unit 20 is provided in the negative carrier 16. However, when the bare film 1 is processed exclusively, the cartridge loading unit 20 may not be provided.
[Brief description of the drawings]
FIG. 1 is a schematic view of the overall configuration of a photographic printing apparatus. FIG. 2 is a cross-sectional view schematically showing the configuration of a negative carrier. FIG. 3 is a perspective view showing a state where an upper unit and a lower unit of the negative carrier are open. FIG. 4 is a plan view of a lower unit of the negative carrier. FIG. 5 is a diagram showing a drive mechanism of a take-up drum. FIG. 6 is a diagram showing an operating state of the take-up mechanism. Sectional view schematically showing the structure of [Description of symbols]
DESCRIPTION OF SYMBOLS 1 Film 16 Negative carrier 20 Cartridge loading part 21 Film insertion part 22 Negative mask 23 Film winding mechanism 30,31,32 Driving roller 60 Winding drum 61 1st pressure roller 61a Support shaft 62 2nd pressure roller 63 Movable guide member 63a Cam part

Claims (3)

A film insertion section for inserting a film;
A transport mechanism for transporting the inserted film along a transport path;
In a film transport unit provided with a film winding mechanism provided at the end of the transport path,
The film winding mechanism is
A winding drum for winding the film;
A first pressure roller that pressure-bonds to the take-up drum and guides the film in a direction to be taken up by the take-up drum;
A second pressure roller that is pressure-bonded to the winding drum and provided on the upstream side of the conveying path of the first pressure roller ;
And a movable member which Ru is released pressure contact between said winding drum of the first press roller,
The second pressure roller is in a pressure-bonded state with the take-up drum in a state where the pressure-bonded state of the first pressure roller with the take-up drum is released by the movable member . A film transport unit characterized in that the film can be discharged out of the transport path by the cooperation of two pressure rollers and the winding drum. Said movable member, the provided on the downstream side of the transport path of the first press roller consists guide member for guiding the direction in which the film is wound on the drum the winding,
The guide member is configured to be movable between a first position where the film can be guided and a second position where the film is not guided, and in conjunction with the movement of the guide member to the second position, The film conveyance unit according to claim 1, wherein the pressure bonding of the first pressure roller with the winding drum is released.   A cam is integrally formed on the guide member, and the support shaft of the first pressure roller is lifted by the movement of the guide member to the second position. Item 3. The film transport unit according to Item 2.

Images