JP3675573B2 - Printing paper turn mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a turn mechanism of a photographic paper disposed in a processing liquid tank in a development processing apparatus for developing a photographic paper exposed with an original image of a film.
[0002]
[Prior art]
In an apparatus for developing a photographic paper by exposing a film image, a plurality of processing tanks each containing a developing solution, a fixing solution, and a cleaning solution are provided in order to develop the photographic paper. And in each processing tank, the processing rack for conveying a photographic paper in the processing liquid in these processing tanks is arrange | positioned. In such an apparatus, the photographic paper carried from the upper part of the processing tank is once transported downward in the processing tank by the processing rack, and then the direction is reversed at the lower end of the processing tank and is directed upward. And then unloaded from the upper part of the treatment tank. Then, although it is carried into the next processing tank again, it is necessary to change the direction so that the photographic paper carried upward in the previous processing tank faces downward again. In this direction change, as shown in FIG. 8, the tip of the photographic paper P carried out from the front processing tank is brought into contact with a return roller 84 provided so as to be freely rotatable, and the photographic paper is moved along the return roller. Has been done.
[0003]
Conventionally, such a return roller is composed of a single roller which is continuous in the width direction as shown in FIG. When such a return roller 84 is used to change the direction of photographic paper arranged in two rows in a zigzag pattern as shown in FIG. 3, when the first photographic paper P1 hits the return roller 84, The return roller 84 rotates freely. However, when the second photographic paper P2 hits the return roller 84, the return roller 84 is still restrained by the first photographic paper P1, so Must not. For this reason, there has been a problem that the leading ends of the second and subsequent photographic papers are damaged by the collision with the return roller.
[0004]
Accordingly, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a return roller mechanism of a photographic paper transport mechanism that can reduce damage to the leading end of the photographic paper. is there.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve the object, the photographic paper turn mechanism according to the present invention is arranged in a processing liquid tank in a development processing apparatus for developing a photographic paper exposed to an original image of a film. a paper turn mechanism that provides a cross-over mechanism for feeding n-th printing paper conveyed by the staggered in two rows from the processing liquid tank to the n + 1 th processing liquid tank, the staggered A turn roller divided into two parts , a roller for feeding one row of photographic paper conveyed in two rows and a roller for feeding the other row, and the two divided turn rollers are supported so as to be freely rotatable. And a frame .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[0009]
FIG. 1 is a side sectional view showing a schematic configuration of a development processing apparatus according to an embodiment of the present invention.
[0010]
In FIG. 1, the development processing apparatus 10 is roughly composed of an exposure unit 12, a photographic paper alignment unit 14, a development processing unit 16, and a drying processing unit 18. The exposure unit 12 includes a light source unit 22 for irradiating the negative film F with light and a lens 24 for enlarging the negative image (in order to obtain a plurality of magnifications, a plurality of single lenses via a zoom lens or switching means). And an exposure table 26 for supporting the photographic paper P below the light source unit 22 and photographic paper cassettes 28 and 30 for supplying the photographic paper onto the exposure table 26. . In the photographic paper cassettes 28 and 30, photographic paper wound in a roll shape is stored. The photographic paper is unwound from the photographic paper cassette 28 or 30, and is photographed one by one by the cutter 32 or 33. It is cut into a size and supplied onto the exposure table 26. The photographic paper P, which has been cut into individual sheets and supplied onto the exposure table 26, is exposed to a predetermined time, and then sent to the photographic paper alignment unit 14.
[0011]
The photographic paper alignment unit 14 converts the exposed photographic paper P from a state in which the photographic papers P are arranged in a row as shown in FIG. 2 to a state in which the photographic paper P is arranged in a staggered manner as shown in FIG. The photographic paper P is conveyed along a path indicated by a two-dot chain line in the drawing, and is transferred to the development processing unit 16. In this way, the photographic paper P is arranged in two rows to speed up the development process. Further, the photographic paper alignment unit 14 is provided with a dot matrix printer (not shown), and prints a negative frame number or the like on the back surface of the photographic paper P.
[0012]
In the apparatus of the present embodiment, the development processing unit 16 includes one developer tank 34, one fixer tank 36, and three water wash tanks 38, 40, and 42. The photographic paper P is reciprocated vertically in each tank along the path indicated by a two-dot chain line in the drawing by the processing racks 44, 46, 48, 50, 52 inserted in each tank, and developed. Fixing and rinsing are performed. Below the washing tanks 38, 40, 42, a developer replenishment tank 54 for supplying the developer to the developer tank 34 and a fixer replenishment tank 56 for supplying the fixer 36 to the fixer tank 36. And a washing liquid replenishing tank 58 for replenishing the washing tank 42 with the washing liquid. Below these tanks, drain cocks 60, 62, and 64 are provided for discharging the drained liquid from the developer tank 34, the fixing liquid tank 36, and the washing tanks 38, 40, and 42 to the outside. .
[0013]
The photographic paper P discharged from the water washing tank 42 after the water washing is carried into the drying processing unit 18 and is reciprocated in the vertical direction by a roller (not shown) disposed in the drying processing unit 18. The photographic paper P is dried by sending air heated by a heater (not shown) from the air duct 66 during the conveyance in the vertical direction. When this drying is completed, the completed photograph is discharged from the discharge port 68 to the outside of the developing processing apparatus 10 and sorted by a sorter (not shown).
[0014]
An openable / closable cover 70 is provided above the development processing unit 16, and the cover 70 is indicated by a two-dot chain line in the drawing when maintenance of the processing rack in each processing tank is required. Thus, maintenance can be performed by pulling up the processing rack from the processing tank.
[0015]
Next, characteristic portions of the present invention in the development processing apparatus configured as described above will be described.
[0016]
FIG. 5 shows the configuration of the processing rack 44 as a typical structure of the processing racks 44, 46, 48, 50, 52 inserted into the processing tanks 34, 36, 38, 40, 42 of the development processing unit 16. It is the side view shown. Other processing racks have the same structure as that shown in FIG.
[0017]
In general, the processing racks disposed in each processing tank are transported with two rollers sandwiching the photographic paper, and the rollers are disposed in a staggered manner and transported using the waist (rigidity) of the photographic paper. There is something. The processing rack of this embodiment employs a configuration in which rollers are arranged in a staggered manner.
[0018]
The processing rack 44 includes a processing rack main body 72 and three rows of conveying rollers 74, 76, and 78 arranged in a staggered manner on the processing rack main body 72. The three rows of transport rollers 74, 76, and 78 are rotationally driven at a constant speed via a gear train by a rotational drive source such as a motor (not shown). The photographic paper P enters the processing rack 44 from the upper left photographic paper entrance in the figure, and is conveyed downward between the conveyance roller 78 in the left row and the conveyance roller 76 in the center row in the drawing. Then, after the direction is changed upward in the lower portion of the processing rack main body 72, it is transported upward between the transport roller 74 in the right row in the drawing and the transport roller 76 in the center row, and the print in the upper right portion in the drawing. It is carried out from the paper exit. In addition, since the arrangement | positioning space | interval of each conveyance roller is about 30 mm and the length of the longitudinal direction is about 127 mm in the size of the photographic paper used for normal simultaneous printing, there are usually at least 4 photographic papers P. It is transported across the transport rollers. Further, when the photographic papers are arranged in two rows in a staggered manner, the deviation amount from the adjacent photographic paper (the dimension indicated by s in FIG. 3) is about 80 mm.
[0019]
In the case where rollers are arranged in a zigzag shape and the photographic paper is conveyed using the waist of the paper, the photographic paper P1, P2, P3,... Arranged as shown in FIG. There arises a problem that only the leading photographic paper P1 gradually shifts backward with respect to other photographic papers as indicated by broken lines in FIG.
[0020]
The reason will be described below.
[0021]
First, in the process in which the photographic paper P is conveyed, the leading end of the photographic paper P is moved to the adjacent conveyance roller 76 (here, the photographic paper P is moved from the conveyance roller 74 toward the conveyance roller 76 as an example). The leading edge of the photographic paper P is not in contact with the outer peripheral surface of the transport roller in a tangential direction, but at an angle with respect to the outer peripheral surface of the transport roller as shown by A in FIG. Touch with. At this time, if the photographic paper P moves from the position indicated by A to the position B indicated by the two-dot chain line, the transport roller 76 rotates by L which is a distance larger than d with respect to the feeding distance d of the photographic paper P. As a result, the transport roller 76 is rotated at a higher speed than when the photographic paper P contacts in the tangential direction. Since the driving system of the conveying roller 76 drives the conveying roller at a speed based on the case where the photographic paper P contacts in the tangential direction of the conveying roller, the conveying roller 76 is driven by the driving force by the backlash of the driving system. Also rotates ahead. Then, after the transport roller 76 has been rotated by the amount corresponding to the backlash, the constant speed rotation of the drive system is not a transport force but a resistance for the photographic paper, and the photographic paper P is braked. This braking force tends to shift the photographic paper P backward.
[0022]
Here, within the distance s (about 80 mm) between the first photographic paper P1 and the second photographic paper P2 in FIG. 3, there are about three transport rollers as already described, and these three Since all of the transport rollers are ahead of the driving force by the amount of backlash, the braking force of the three transport rollers is applied to the photographic paper P1, and the photographic paper P1 is shifted backward. Become. On the other hand, when the leading edge of the second photographic paper P2 comes into contact with the conveyance roller, the conveyance roller is pressed by the first photographic paper P1, so that it does not rotate fast by being pushed by the photographic paper P2. Since the normal constant speed rotation is maintained, it does not freely rotate by the amount of backlash, but as long as it rotates at a constant speed, this transport roller exerts a braking force on the second photographic paper P2. Arise. However, since the other three transport rollers transporting the second photographic paper P2 have already been shifted back in the reverse direction and the driving force has been changed, the second print The paper P2 only receives the braking force of the leading one transport roller, and the force for shifting the photographic paper P2 backward is small. Therefore, the amount shifted backward is smaller than that of the first photographic paper P2. Further, since the second and subsequent photographic papers all have the same contact condition with the conveying roller, even if they are deviated, all the photographic papers are shifted in parallel by substantially the same amount. Therefore, only the leading photographic paper P1 to which a large braking force is applied is gradually shifted backward as the conveyance proceeds.
[0023]
In the processing rack of the present embodiment, in order to solve this problem, as shown in FIG. 5, pressing rollers 80 that can freely rotate are arranged on both sides of the transport roller 76a located at the approximate center in the vertical direction of the unit. . In this way, when the printing paper is sandwiched and transported by the pressing roller 80 and the transport roller 76a, no slip occurs between the printing paper P and the roller in this portion, and a large braking force is applied to the first printing paper P1. However, the photographic paper P1 can be accurately conveyed by a predetermined distance. As a result, it is possible to eliminate the fact that only the top photographic paper P1 is greatly displaced backward.
[0024]
FIG. 7 shows a modified example of the mechanism for preventing such photographic paper displacement. A belt 82 is applied to the conveying rollers 74 and 78 on both sides of the conveying roller 76 located at the approximate center in the vertical direction of the processing rack. The slip of the photographic paper P is prevented by sandwiching the photographic paper P by the belt 82 and the conveying roller 76. Even with this configuration, it is possible to prevent the first photographic paper P1 from being displaced.
[0025]
Next, FIG. 8 is a view showing a return roller disposed in the middle of each processing rack.
[0026]
For example, the processing racks 44 and 46 will be described as an example. The photographic paper P discharged from the processing rack 44 collides with the return roller 84 and is turned downward to be carried into the processing rack 46. At this time, it is preferable for the return roller 84 to freely rotate as the photographic paper P moves so as not to damage the photographic paper. Therefore, the return roller 84 is supported so as to be freely rotatable.
[0027]
Conventionally, such a return roller 84 is composed of a single roller continuous in the width direction as shown in FIG. When such a return roller 84 is used to change the direction of photographic papers arranged in two rows as shown in FIG. 3, when the first photographic paper P1 hits the return roller 84, the return roller 84. However, when the second photographic paper P2 collides with the return roller 84, the return roller 84 is still restrained by the first photographic paper P1, and thus is not in a completely free rotation state. For this reason, there has been a problem that the leading ends of the second and subsequent photographic papers are damaged by the collision with the return roller.
[0028]
In this embodiment, in order to solve this problem, the return roller 84 can be divided into two rollers 84 a and 84 b as shown in FIG. 10, and each roller can freely rotate independently of the frame 85. I am doing so. In this way, the two rows of photographic paper P shown in FIG. 3 can rotate the return roller without being affected by the photographic paper in the next row, and therefore, damage to the leading edge of the photographic paper is eliminated. be able to.
[0029]
Next, FIG. 11 is a view showing a structure for use when performing maintenance on the processing racks 44, 46, 48, 50, 52, and FIG. 12 is a view of the processing rack as seen from the side. All the processing racks have a structure as shown in FIGS. 11 and 12. In FIGS. 11 and 12, the structure of the processing rack 44 is shown as a representative example.
[0030]
11 and 12, three hooking levers 86, 88, and 90 are attached to the side of the processing rack main body 72 so as to be rotatable in the paper surface by pins 92, 94, and 96 spaced apart in the vertical direction. ing. In the normal operation state of the development processing apparatus 10, the hook levers 86, 88, 90 are closed as indicated by an arrow C in FIG. 11, and the processing rack 44 is accommodated in the processing tank 34. In this state, the processing rack 44 is immersed in the liquid below the squeeze roller 98 portion.
[0031]
The processing rack 44 is pulled upward from the liquid tank 34 for maintenance such as cleaning of rollers provided on the processing rack 44. At this time, as shown in FIG. Pull it out to the position indicated by the dotted line and hook it on the upper end of the liquid tank 34. Thereby, the processing rack 44 is supported in a state of protruding above the liquid tank 34. Since the hook levers are provided at three positions in the vertical direction as described above, if the maintenance of only the squeeze roller 98 is performed, the uppermost hook lever 86 is hooked on the upper end of the liquid tank 34. The squeeze roller 98 is protruded above the liquid tank 34. Further, when maintenance is required in a portion below the squeeze roller 98, the hook lever 88 or 90 is pulled out as necessary to change the amount of protrusion of the processing rack 44. Thus, by providing the mechanism that can hold the processing rack in a state of protruding above the liquid tank, it is not necessary to hold the processing rack by hand, and the maintenance of the processing rack can be easily performed. Even when the processing rack is completely removed from the liquid tank and cleaned, the processing rack can be easily drained by leaving it for a while with the hook lever 90 fully pulled out from the liquid. Can be done. The hook levers 86, 88, and 90 are provided with stopper portions 86a, 88a, and 90a. When these portions come into contact with the processing rack body 72, they stop at the positions indicated by the two-dot chain lines in FIG. It is made like that.
[0032]
Next, FIG. 13 is a diagram showing an arrangement state of the squeeze rollers in the processing rack. Although FIG. 13 shows the processing racks 44 and 46, similar squeeze rollers are also arranged in the other processing racks.
[0033]
In FIG. 13, squeeze rollers 98a and 98b serve to squeeze the processing liquid adhering to the photographic paper P and prevent the processing liquid from being brought into the adjacent processing tank. Further, the processing rack 52 disposed in the final washing tank 42 serves to improve the drying efficiency in the next drying process by squeezing the cleaning liquid adhering to the photographic paper P.
[0034]
In such a squeeze roller, since the roller is always rotating, the processing liquid adhering to the squeeze roller from the photographic paper P adheres to the photographic paper P again when the roller makes one rotation. is there. For this reason, in this embodiment, the blades 100a and 100b having elasticity are arranged so that the tips come into contact with the squeeze rollers 98a and 98b, and the processing liquid transferred from the photographic paper P is removed into the processing tank. Yes. As a result, the processing liquid once transferred from the photographic paper P to the roller is prevented from returning to the photographic paper P again when the rollers 98a and 98b make one rotation, and the amount of processing liquid brought into the adjacent processing tank is reduced. Is reduced. The blades 100a and 100b are preferably made of a material having high chemical resistance and wear resistance and a low friction coefficient.
[0035]
FIG. 14 is an enlarged view of the squeeze roller 98a and the blade 100a. As illustrated, the processing liquid adhering to the squeeze roller 98a is wiped off by the blade 100a.
[0036]
FIG. 15 is a view showing the squeeze roller disposed in the final water rinsing tank 42. Similarly to the above, the cleaning liquid adhering to the squeeze roller 102a is wiped off by the blade 104, thereby drying in the next drying step. Efficiency can be improved.
[0037]
FIG. 16 shows a specific arrangement configuration of the squeeze rollers in the processing rack.
[0038]
Next, FIG. 17 is a view showing the arrangement configuration of the squeeze rollers in the washing tanks 38, 40, 42.
[0039]
The washing tanks 38, 40, and 42 have different levels of the washing liquid, the washing tank 38 has the lowest water level, the washing tank 40 has a higher water level, and the washing tank 42 has the highest level. Then, when a new cleaning solution is replenished to the washing tanks 38, 40, 42, the cleaning solution is replenished to the final-stage washing tank 42, and the overflowed washing solution is supplied to the preceding washing tank 40 and further overflows there. The washed liquid is further supplied to the preceding water washing tank 38. The cleaning liquid that has overflowed in the first water rinsing tank 38 is discharged from the lower part of the water rinsing tank 38 to the drainage tank as drainage. By doing in this way, a new washing | cleaning liquid is supplied to the most beautiful washing tank 42, the washing | cleaning liquid in the washing tank 42 with few stain | pollution | contamination is further supplied to the previous washing tank 40, and also the washing | cleaning liquid in the washing tank 40 is further. It is supplied to the preceding water washing tank 38. Then, the processing liquid from the adjacent fixing liquid tank 38 is brought in, and the cleaning liquid in the water washing tank 38 that is most dirty can be discharged as waste liquid. Thereby, effective utilization of a new cleaning liquid can be aimed at.
[0040]
Here, in the case where the cleaning liquid is supplied to the final stage water washing tank and the adjacent water washing tank in this way, in the present embodiment, the supplied cleaning liquid is poured into the squeeze roller, and the squeeze roller is simultaneously cleaned. . Specifically, in FIG. 17, when a new cleaning liquid is supplied to the water rinsing tank 42, the cleaning liquid supplied to the supply unit 110 is dropped on the substantially central portion of the squeeze roller 112 a, and the length of the roller is increased by the adjacent spiral roller 114. The squeeze roller 112a is cleaned by being diffused in the direction. As shown in FIG. 18, the spiral roller 114 is a roller in which a spiral groove is formed symmetrically with respect to the central portion in the longitudinal direction of the roller body, and the cleaning liquid flows along the groove 114a in the central portion of the squeeze roller 112a. Is diffused toward both ends. The cleaning liquid that has cleaned the squeeze roller 112a is then transferred to the adjacent squeeze roller 112b to clean the squeeze roller 112b. Below the squeeze roller 112b, a diffusing member 116 having a curved surface 116a formed so as to have a slight gap with respect to the outer peripheral surface thereof is disposed. The cleaning liquid that has cleaned the squeeze roller 112b is diffused between the squeeze roller 112b and the curved surface 116a by the surface tension, and is supplied to the squeeze rollers 118a and 118b to clean the squeeze rollers 118a and 118b. Thus, by providing the diffusing member 116 at the lower part of the squeeze roller 112b, the cleaning liquid that has cleaned the squeeze roller 112b does not fall into the washing tank 42 as it is, and can be used for cleaning the squeeze rollers 118a and 118b. Therefore, the cleaning liquid can be effectively used.
[0041]
The washing tanks 38 and 40 are also provided with a washing liquid supply unit 110 as shown in FIG. 17. In the washing tank 40, the washing liquid overflowed in the adjacent washing tank 42 is supplied to the washing tank 40. The squeeze roller is cleaned in the same manner as in FIG. In the washing tank 38, the cleaning liquid overflowed in the adjacent washing tank 40 is supplied to the supply unit 110 of the washing tank 38, and the squeeze roller is cleaned in the same manner.
[0042]
Further, when the cleaning liquid in the water washing tanks 38, 40, 42 evaporates and the water level of the cleaning liquid falls below a predetermined value, the cleaning liquid is replenished in the same manner as described above, and the squeeze roller is cleaned.
[0043]
Further, the squeeze rollers for the washing tanks 38, 40 and 42 are also provided with a blade for removing the washing liquid. In the case of the washing tank, the washing liquid dropped from the squeeze roller 112b is supplied to the squeeze rollers 118a and 118b. Therefore, the blades 122 and 124 are provided only in the squeeze rollers 118b and 120b.
[0044]
Next, FIG.19 and FIG.20 is the figure which showed the drainage tank.
[0045]
As already explained, in the washing tanks 38, 40, 42, new washing liquid is supplied to the washing tank 42, and the dirty washing liquid is gradually discharged from the lower part of the washing tank 38 as drainage. The discharged drainage is stored in the drainage tank 130. In the developing solution tank 34 and the fixing solution tank 36, new processing liquid is supplied to the upper part of each tank, and the discharged liquid is discharged little by little from the lower part of each tank. Among these drainage liquids, the drainage liquid of the developer is stored in the drainage tank 134, and the drainage liquid of the fixing liquid is stored in the drainage tank 136.
This drainage tank is provided with a sensor for detecting the full state of the normal drainage. When this sensor detects the fullness of the liquid, it is notified to the outside, and the operator discharges from the drainage tank. Drain the liquid. However, when this sensor fails, the drainage liquid may overflow from the drainage tank, and it may take time to remove the overflowing liquid. In this embodiment, overflow of the drainage from the drainage tank is prevented.
[0046]
Specifically, as shown in FIGS. 19 and 20, overflow ports 136, 138, and 140 are provided in the upper portions of the drainage tanks 130, 132, and 134, and the drained liquid overflowed in the drainage tanks 130, 132, and 134 is discharged. Try to pull it out. The drained drained liquid is discharged to a tray 144 arranged at a position where it can be directly touched by an operator through a pipe 142. Since the pipe 142 is connected in common to the overflow ports 136, 138, 140 of the three drainage tanks, the drainage is discharged to the tray 144 when any of the three drainage tanks overflows. The However, also in this embodiment, a sensor for detecting the fullness of the drainage is provided, and the drainage is discharged to the tray 144 in a special case such as sensor failure. When the operator discovers that the drainage is overflowing in the tray 144, the drain cocks 60, 62, connected to the lower parts of the drainage tanks 130, 132, 134 through the pipes 150, 148, 146, Drain the effluent from 64. At the same time, the tray 144 is cleaned. The drain cocks 60, 62, and 64 are disposed immediately above the tray 144. When the drain 144 stores the drainage from the drain cocks 60, 62, and 64 into the drainage container, the drainage is stored in the floor. It is also designed to function as a saucer to prevent spills.
[0047]
Thus, by providing an overflow port at the top of the drainage tank, it is possible to prevent the drainage from overflowing onto the floor even when the sensor fails.
[0048]
Next, FIG. 21 is a side sectional view showing a schematic configuration of the stirring mechanism in the processing liquid replenishment tank.
[0049]
Usually, processing solutions such as developer, fixing solution, and cleaning solution are prepared by mixing two or three kinds of chemicals. Conventionally, after chemicals are manually mixed outside the development processing apparatus, The finished processing solution was transferred to the replenishing tank. In the present embodiment, in order to reduce this labor, chemicals to be mixed are put directly into the replenishing tank, and stirring and mixing are performed in the replenishing tank.
[0050]
In FIG. 21, a chemical inlet 150 is formed at an end of the replenishing tank 58 (54, 56), and an insertion for inserting a stirring rod 152 for stirring the chemical is provided at a substantially central portion. A mouth 154 is formed. A lid 156 for sealing the insertion port 154 is attached to the insertion port 154, and a stirring rod 152 is rotatably supported on the lid 156. A rotating arm 158 is fixed to the upper end of the stirring rod 152. A pulley 160 is disposed above the replenishment tank 58 (54, 56). The pulley 160 is rotatably supported by the replenishment tank 58 (54, 56) via a bracket (not shown). . A rotating plate 162 is fixed to the pulley 160, and a pin 164 fixed to the outer peripheral portion of the rotating plate 162 is in contact with the tip 158 a of the rotating arm 158. Therefore, the stirring rod 152 is rotated by the rotation of the pulley 160. On the right side of the pulley 160, a motor 166 is fixed to the same bracket as the bracket on which the pulley 160 is supported, and a belt 170 is stretched between the pulley 168 attached to the rotating shaft of the motor 166 and the pulley 160. Has been.
[0051]
In addition, a lid 174 that is supported so as to be openable and closable around a shaft 172 is disposed at the insertion port 150, and a magnet 176 is attached to the back surface of the lid 174. A magnetic sensor 178 is disposed at a position facing the magnet 176 when the lid 174 is opened as shown by a broken line, so that it can be detected that the lid 174 is opened. The magnetic sensor 178 and the motor 166 are both connected to the control device 179, and the control device 179 controls the rotation of the motor 166 based on the detection signal of the magnetic sensor 178.
[0052]
In the stirring mechanism 200 configured in this manner, when the lid 174 is opened, the magnetic sensor 178 detects this, and this detection signal is sent to the control device 179, and the control device 179 rotates the motor 166 to rotate the stirring rod 152. By rotating, the chemicals are automatically stirred.
[0053]
Next, FIG. 22 is a plan view of the stirring mechanism 200 as viewed from above, and shows a configuration in which the stirring rods 152 arranged in the three replenishing tanks 54, 56, 58 are simultaneously driven by one motor 166. ing. Pulleys 160 a, 160 b, 160 c are attached to the stirring rods 152 arranged in the respective replenishing tanks, and a belt 170 is spanned between the pulleys 160 a, 160 b, 160 c and the pulley 168 of the motor 166. Has been. A one-way clutch 180 is disposed on the pulley 160c of the developer replenishing tank 54, and the rotation of the pulley 160c is transmitted to the stirring rod only when the motor 166 rotates, for example, in the clockwise direction. ing.
[0054]
In the stirring mechanism 200 configured as described above, when any one of the three replenishing tank lids 174a, 174b, 174c is opened, any one of the magnetic sensors 178a, 178b, 178c reacts, and the control device 179 operates. The motor 168 is rotated. At this time, either or both of the magnetic sensors 178a and 178b of the cleaning liquid replenishment tank 58 and the fixing liquid replenishment tank 56 detect that the lids 174a and 174b are opened, and the magnetic sensor 178c detects that the lid 174c is opened. If not, the control device 179 rotates the motor 168 counterclockwise. Accordingly, only the stirring rods of the cleaning solution replenishment tank 58 and the fixing solution replenishment tank 56 rotate, and the stirring rod of the developer replenishment tank 54 does not rotate due to the action of the one-way clutch 180. Further, when the magnetic sensor 178c detects that the lid 174c of the developer replenishing tank 54 is opened, the control device 179 unconditionally turns the motor 166 regardless of the detection states of the other magnetic sensors 178a and 178b. Rotate clockwise. As a result, the agitation bar of the developer replenishment tank 54, the agitation bar of the fixing liquid replenishment tank 56, and the agitation bar of the cleaning liquid replenishment tank 58 rotate together.
[0055]
In this way, the rotational states of the stirring rods of the three replenishing tanks are made different for the following reason. That is, the developer is more likely to deteriorate due to oxidation than the fixing solution and the cleaning solution. For this reason, the fixing solution and the cleaning solution are not deteriorated by oxidation even if they are stirred at the same time when other processing solutions are stirred. Therefore, there is no problem even if the stirring rod rotates during replenishment of other processing solutions. On the other hand, if the developing solution is stirred at the same time when only other processing solutions are replenished, deterioration due to oxidation occurs. For this reason, in this embodiment, a one-way clutch is provided only on the stirring rod for the developing solution, and the developing solution is stirred only when the developing solution is replenished. In this way, deterioration due to oxidation of the developer is prevented.
[0056]
As described above, according to the above-described embodiment, the return rollers disposed between the processing racks are divided into two, so that the photographic papers arranged in two rows independently rotate the return rollers independently. Therefore, the leading edge of the photographic paper is prevented from being damaged.
[0057]
It should be noted that the present invention can be applied to modifications or variations of the above-described embodiment without departing from the gist thereof.
[0058]
【The invention's effect】
As described above, according to the present invention, the return rollers provided between the photographic paper transport mechanisms are divided into two, so that the photographic papers arranged in two rows can freely move the two return rollers independently. Since it can be rotated, the tip of the photographic paper is prevented from being damaged.
[0059]
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a schematic configuration of a development processing apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a state in which photographic papers are arranged in a line.
FIG. 3 is a diagram showing a state in which photographic papers are arranged in two rows in a zigzag pattern.
FIG. 4 is a diagram showing a state in which the leading photographic paper is gradually delayed.
FIG. 5 is a side sectional view showing a typical structure of a processing rack.
FIG. 6 is a diagram illustrating a state in which a conveyance roller is rapidly rotated.
FIG. 7 is a view showing a modified example of the structure of the processing rack.
FIG. 8 is a view showing a return roller disposed in the middle of the processing rack.
FIG. 9 is a view showing a conventional return roller.
FIG. 10 is a view showing a return roller of the present embodiment.
FIG. 11 is a view showing a configuration for holding the processing rack in a state of protruding from the processing tank.
FIG. 12 is a diagram showing a configuration for holding the processing rack in a state of protruding from the processing tank.
FIG. 13 is a diagram showing an arrangement state of squeeze rollers in a processing rack.
FIG. 14 is an enlarged view of a squeeze roller and a blade in contact with the squeeze roller.
FIG. 15 is a view showing an arrangement state of squeeze rollers in the final-stage washing tank.
FIG. 16 is a diagram showing a specific arrangement configuration of squeeze rollers in a processing rack.
FIG. 17 is a view showing an arrangement configuration of squeeze rollers in a washing tank.
FIG. 18 is a diagram showing a configuration of a spiral roller.
FIG. 19 is a view showing a drainage tank.
FIG. 20 is a view showing a drainage path for drainage from the drainage tank.
FIG. 21 is a view showing a schematic configuration of a stirring mechanism in a replenishment tank for processing liquid.
FIG. 22 is a plan view of the stirring mechanism as viewed from above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Development processing apparatus 12 Exposure part 14 Printing paper alignment part 16 Development processing part 18 Drying processing part 20 Negative 22 Light source part 24 Zoom lens 26 Exposure stand 28,30 Printing paper cassette 32,33 Cutter 34 Developer tank 36 Fixing liquid tank 38 , 40, 42 Washing tank 44, 46, 48, 50, 52 Processing rack 54 Developer replenishment tank 56 Fixing liquid replenishment tank 58 Cleaning liquid replenishment tank 60, 62, 64 Drain cock 66 Air duct 68 Discharge port 70 Cover 72 Processing rack body 74 76, 78 Conveying roller 80 Pressing roller 82 Belt 84 Return roller 86, 88, 90 Hook lever 92, 94, 96 Pin 98, 102, 112, 118, 120 Squeeze roller 100, 104, 122, 124 Blade 114 Spiral roller 116 Diffusion member 130,132,134 Drain tank 136,138,140 Overflow port 142, 146, 148, 150 Piping 144 Tray 152 Stirring rod 154 Insertion port 156,174 Cover 158 Rotating arm 160, 168 Pulley 162 Rotating plate 164 Pin 166 Motor 170 Belt 172 Shaft 176 Magnet 178 Magnetic sensor 200 Stirring mechanism

Claims (1)

In a development processing apparatus for developing a photographic paper exposed to an original image of a film, a photographic paper turn mechanism disposed in a processing liquid tank,
A crossover mechanism for feeding n-th printing paper conveyed in two rows in a staggered manner from the processing liquid tank to the n + 1 th processing tank, the printing paper conveyed by the staggered in two rows A turn roller divided into two , a roller for feeding one row and a roller for feeding the other row ;
A frame that supports the two divided turn rollers independently and freely rotatable;
A turning mechanism for photographic paper, comprising:

Images