JP2007025461A - Photoprocessor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively suppress the degradation of image quality caused by the vibration of a photosensitive material. <P>SOLUTION: A photosensitive material P is exposure-processed while being transported by a pair of exposure transport rollers 25 and 26 at a constant speed. At this stage, normally, a pair of receiving rollers 21 are in an open state. When the photosensitive material P is cut off by a cutter 12, during exposure processing in an exposure section, the pair of receiving rollers 21 are switched to a nipping state, just before the photosensitive material P is cut off. Further, the pair of receiving rollers 21 are switched to the nipping state just before the tailing edge of the photosensitive material P passes through a pair of sending rollers 13. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a photographic processing apparatus that cuts a long photosensitive material into a print size and performs an exposure process on the photosensitive material.

  When exposure processing is performed on a roll-shaped photosensitive material in a photographic processing apparatus, the exposure processing is often performed after the photosensitive material is cut into a print size. Here, when the distance between the cutting portion for cutting the photosensitive material and the exposure portion for performing the exposure process is short, the photosensitive material must be cut at the cutting portion in parallel with the exposure processing for the photosensitive material in the exposure portion. It may not be. In such a case, the vibration that occurs when the photosensitive material is cut is transmitted to the photosensitive material that is subjected to the exposure process in the exposure unit, and the quality of the image formed on the photosensitive material is deteriorated. .

Thus, a photographic processing apparatus is known that can form a slack (loop) of a photosensitive material between a cutting portion and an exposure portion (see, for example, Patent Document 1). In this photographic processing apparatus, a slack of the photosensitive material is formed between the feeding roller and the receiving roller arranged on the upstream side from the exposure position. In this state, when the leading end portion of the photosensitive material is supplied to the conveyance roller near the exposure position and the leading end portion of the photosensitive material is sandwiched between the conveyance rollers, the pressure bonding of the receiving roller is released. Thereafter, an exposure process is performed on the photosensitive material conveyed by the conveying roller in a state where the slack of the photosensitive material is formed between the feeding roller and the conveying roller. Therefore, even when the photosensitive material is cut by a cutter disposed on the upstream side of the feed roller, vibration at the time of cutting is not easily transmitted to the photosensitive material at the exposure position, and deterioration of image quality is suppressed.
Japanese Patent Laying-Open No. 2005-103806 (FIG. 2)

  However, even when the slack of the photosensitive material is formed between the cutting portion and the exposure portion, when the photosensitive material is cut during the exposure processing, the exposure processing is performed in the exposure portion due to vibration during cutting. There is a possibility that the quality of an image formed on the photosensitive material is deteriorated by being transmitted to the photosensitive material. Further, when the rear end portion of the photosensitive material is conveyed through the loop forming portion after passing through the feed roller, the rear end portion of the photosensitive material is conveyed between a pair of guides facing each other with a slight gap. Therefore, the rear end portion of the photosensitive material can be moved greatly. Therefore, when the rear end portion of the photosensitive material is conveyed through the loop forming portion, the rear end portion of the photosensitive material may flutter and generate vibration. This vibration of the photosensitive material also causes the quality of the image formed on the photosensitive material to deteriorate.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a photographic processing apparatus capable of suppressing a decrease in image quality caused by vibration of a photosensitive material.

Means for Solving the Problems and Effects of the Invention

  The photographic processing apparatus of the present invention is capable of transporting an exposure unit that performs an exposure process on a photosensitive material, and the photosensitive material that sandwiches and transports the photosensitive material, and controls the transport speed of the photosensitive material at the exposure position by the exposure unit. A pair of rollers, a cutting unit that cuts the photosensitive material upstream of the exposure unit in the transport direction, a pair of feed rollers that can sandwich and transport the photosensitive material downstream of the cutting unit in the transport direction, and the feed roller A pair of receiving rollers which are arranged between a pair and the exposure transport unit and can take either a sandwiched state in which the photosensitive material is sandwiched or an open state in which the photosensitive material is not sandwiched; the delivery roller pair and the receiving unit In a state where a slack portion is formed in at least a part of the photosensitive material conveyed between the pair of rollers, the receiving roller pair is in an open state and the exposure conveying roller pair In the case where the photosensitive material is cut by the cutting unit when the exposure process is performed on the photosensitive material conveyed further, the receiving roller pair is immediately before the photosensitive material is cut. And a control means for switching to a clamping state.

  According to this configuration, when the photosensitive material is cut at the cutting portion while the exposure processing is performed at the exposure portion, the slack portion of the photosensitive material is provided between the sending roller pair and the receiving roller pair. As a result, the vibration of the photosensitive material at the time of cutting at the cutting portion is attenuated by the slack portion, and immediately before the photosensitive material is cut, the receiving roller pair disposed between the exposure portion and the cutting portion is photosensitive. Since the material is sandwiched, the vibration of the photosensitive material at the time of cutting at the cutting portion is not easily transmitted to the photosensitive material on which the exposure processing is performed. Accordingly, a decrease in image quality due to vibration of the photosensitive material during cutting is suppressed.

  In the photographic processing apparatus of the present invention, when the receiving roller pair is in an open state, the control means holds the receiving roller pair immediately before the rear end portion of the photosensitive material is not pinched by the feeding roller pair. You may switch to.

  According to this configuration, since the receiving roller pair sandwiches the photosensitive material immediately before the rear end portion of the photosensitive material passes through the feeding roller, even if the rear end portion of the photosensitive material flutters, the photosensitive material The vibration of the rear end portion is not easily transmitted to the photosensitive material on which the exposure process is performed. Accordingly, a decrease in image quality due to vibration of the rear end portion of the photosensitive material is suppressed.

  In the photographic processing apparatus of the present invention, the control means switches the receiving roller pair to an open state after the photosensitive material is sandwiched between the exposure conveying roller pair when the receiving roller pair is sandwiched. Also good.

  According to this configuration, when the exposure processing is performed while the photosensitive material is held between the exposure conveyance roller pair, immediately before the photosensitive material is cut, immediately before the rear end portion of the photosensitive material passes through the delivery roller pair, and The receiving roller pair is in an open state except when the rear end portion of the photosensitive material is conveyed through the slack formation region. Therefore, normally, the photosensitive material that has been subjected to the exposure process is sandwiched only by the pair of exposure transport rollers, so that the exposure process is performed on the photosensitive material that is sandwiched by a large number of roller pairs, thereby degrading the image quality. Is suppressed.

  In the photographic processing apparatus of the present invention, a sag-forming region of a photosensitive material is provided at least at a part between the sending roller pair and the receiving roller pair, and the control means is configured so that the receiving roller pair is in an open state. In some cases, the receiving roller pair may be held in a sandwiched state while the rear end portion of the photosensitive material is conveyed through the slack formation region.

  According to this configuration, the receiving roller pair holds the photosensitive material while the rear end portion of the photosensitive material is transported through the slack formation region, so that the rear end portion of the photosensitive material flutters during this time. However, the deterioration of image quality due to the vibration of the rear end portion of the photosensitive material is surely suppressed.

  The photographic processing apparatus of the present invention is capable of transporting an exposure unit that performs an exposure process on a photosensitive material, and the photosensitive material that sandwiches and transports the photosensitive material, and controls the transport speed of the photosensitive material at the exposure position by the exposure unit. A pair of rollers, a cutting section that cuts the photosensitive material upstream of the exposure section in the transport direction, and a sandwiched state in which the photosensitive material is sandwiched between the cutting section and the exposure transport section, and the photosensitive material A pair of receiving rollers capable of taking any state of an open state that does not sandwich the sheet, a pair of delivery rollers disposed between the cutting portion and the pair of receiving rollers, and capable of sandwiching and conveying the photosensitive material, And a control means for switching the receiving roller pair to the clamping state immediately before the rear end portion of the photosensitive material is not clamped by the feeding roller pair when the receiving roller pair is in the open state. To have.

  According to this configuration, the receiving roller pair disposed between the exposure unit and the cutting unit sandwiches the photosensitive material immediately before the rear end of the photosensitive material passes through the feeding roller. Even when the end portion flutters, the vibration of the rear end portion of the photosensitive material is hardly transmitted to the photosensitive material on which the exposure processing is performed. Accordingly, a decrease in image quality due to vibration of the rear end portion of the photosensitive material is suppressed.

  In the photographic processing apparatus of the present invention, a sag-forming region of a photosensitive material is provided at least at a part between the sending roller pair and the receiving roller pair, and the control means is configured so that the receiving roller pair is in an open state. In some cases, the receiving roller pair may be held in a sandwiched state while the rear end portion of the photosensitive material is conveyed through the slack formation region.

  According to this configuration, the receiving roller pair holds the photosensitive material while the rear end portion of the photosensitive material is transported through the slack formation region, so that the rear end portion of the photosensitive material flutters during this time. However, the deterioration of image quality due to the vibration of the rear end portion of the photosensitive material is surely suppressed.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a photographic processing apparatus according to an embodiment of the present invention.

  A photographic processing apparatus 1 shown in FIG. 1 cuts a long photosensitive material P into a predetermined length, and exposes the cut photosensitive material P to an exposure process. The photosensitive material P having a latent image formed on the surface is immersed in a developing solution, developed and dried, and the photosensitive material P exposed by the printer unit A is arranged in parallel and conveyed to the processor B. And a connecting portion C. The printer unit A, the processor unit B, and the connecting unit C are formed by the same casing.

  On the upper part outside the housing of the printer unit A, a monitor 5 for displaying the processing status of the photographic processing device 1 and a reading device 6 for reading image data stored in a compact disc, a memory card or the like brought by the customer. And are provided. Further, inside the printer unit A, the image data read by the reading device 6 is temporarily stored, and the control unit 7 for controlling each part of the photographic processing apparatus 1 and a roll so that the emulsion surface is on the outside. The long photosensitive material P wound in the shape of a magazine 8 is rotatably supported around the shaft, and the photosensitive material P drawn out from the magazine 8 is cut into a predetermined length. On the emulsion surface of the photosensitive material P conveyed by the exposure conveying unit 20, the paper conveying unit 10 conveying the photosensitive material P received in the horizontal direction, the exposure conveying unit 20 conveying the photosensitive material P received from the paper supplying unit 10 in the sub-scanning direction. And a laser scanning type exposure unit 28 for performing exposure processing (so-called scanning exposure).

  The processor unit B includes a development processing unit 30 that performs development processing by immersing the photosensitive material P that has been subjected to exposure processing in a developing solution, and a drying unit 40 that dries the photosensitive material P developed by the development processing unit 30. Have. In the development processing unit 30, a plurality of pairs of rollers 32 arranged in parallel and appropriately arranged so as to be able to immerse and lift the photosensitive material P into the development processing bath 31. And are provided. Developers are put in a plurality of tanks of the development processing tank 31, and in the processor unit B, the photosensitive materials P in the parallel state subjected to the exposure process are maintained in the parallel state by the plurality of roller pairs 32. The immersion in the developer in the tank and the pulling up from the developer are repeated. Thereafter, the film is transported to a drying device 40 where a drying process is performed, and the wetting of the photosensitive material due to the immersion of the developer is dried.

  Next, the structure of the paper supply part 10 and the exposure conveyance part 20 is demonstrated with reference to FIG. FIG. 2 is a diagram illustrating the configuration of the paper supply unit and the exposure transport unit of the photographic processing apparatus of FIG.

  As shown in FIG. 2, the paper supply unit 10 includes a cutter 12 that cuts the photosensitive material P, an introduction roller pair 11 that conveys the photosensitive material P drawn from the magazine 8 to the cutting position of the cutter 12, It has a pair of delivery rollers 13 arranged on the downstream side and a chucker device 14 that conveys the photosensitive material P in the horizontal direction.

  The introduction roller pair 11 includes a driving roller 11a and two driven rollers 11b and 11c that sandwich the photosensitive material P between the driving roller 11a. The driving roller 11a is rotationally driven by a driving force from a motor (not shown) connected to the control unit 7.

  The cutter 12 has a fixed blade 12a and a movable blade 12b for cutting the photosensitive material P into a print size. The fixed blade 12a is fixed below the conveyance path of the photosensitive material P, and the movable blade 12b moves up and down toward the fixed blade 12a by a driving force from a motor (not shown) connected to the control unit 7. Is possible.

  The feed roller pair 13 includes a driving roller 13a and a driven roller 13b that sandwiches the photosensitive material P between the driving roller 13a. The driving roller 13a is rotationally driven by a driving force from a motor (not shown) connected to the control unit 7.

  The chucker device 14 is for supplying the leading end portion of the photosensitive material P to the exposure transport unit 20. The chucker device 14 is provided with a sandwiching portion 14a that sandwiches the leading end portion of the photosensitive material P, and the carrier 14b that holds the sandwiching portion 14a is movable in the horizontal direction along the moving shaft 14c. Accordingly, the carrier 14b moves toward the exposure conveyance unit 20 after the leading end of the photosensitive material P is clamped by the clamping unit 14a in a state where the carrier 14b is disposed in the vicinity of the delivery roller pair 13 (the state shown in FIG. 2). By moving, the leading end portion of the photosensitive material P can be fed into the exposure transport unit 20.

  Further, a loop forming region L disposed below the conveyance path of the photosensitive material P is provided on the downstream side of the pair of feed rollers 13 of the paper supply unit 10. That is, in the paper supply unit 10, the horizontal guide 15 is provided on the downstream side of the delivery roller pair 13, and the horizontal guide 17 is provided on the upstream side of the receiving roller 21 of the exposure transport unit 20. The horizontal guide 15 and the horizontal guide 17 are separated from each other, and an inclined guide 16 extending obliquely downward from the end of the horizontal guide 15 is provided. Therefore, a region between the horizontal guide 15 and the horizontal guide 17 and above the inclined guide 16 becomes a loop forming region L.

  Further, above the loop forming region L, two rotating rollers 18 that are rotatably supported by a supporting member (not shown) are disposed. The two rotating rollers 18 are disposed at positions symmetrical to the center position in the width direction of the transport path above the transport path of the photosensitive material P. That is, the two rotation rollers 18 are spaced apart in the direction perpendicular to the paper surface in FIG.

  The two rotating rollers 18 are for allowing the slack of the photosensitive material P to be formed in the loop forming region L. That is, when the rotational driving of the feed roller pair 13 is started in a state where the leading end portion of the photosensitive material P is clamped by the clamping portion 14a of the chucker device 14, the photosensitive material P is caused by the curling of the photosensitive material P. It begins to sag above the transport path. Then, when the slack of the photosensitive material P is slightly formed, the photosensitive material P comes into contact with the two rotating rollers 18, the waist of the photosensitive material P is folded, and the slack of the photosensitive material P is a loop below the transport path. It is formed in the formation region L. Here, even when the photosensitive material P comes into contact with the two rotating rollers 18, the rotating roller 18 is rotatably supported, so that damage to the photosensitive material P is suppressed.

  The exposure transport unit 20 includes a receiving roller pair 21 that receives the photosensitive material P supplied from the paper supply unit 10, and two exposure transport roller pairs 25 that control the transport speed of the photosensitive material P at the exposure position by the exposure unit 28. 26.

  The receiving roller pair 21 has a driving roller 21a and a driven roller 21b that can take either a holding position for holding the photosensitive material P between the driving roller 21a and an opening position for not holding the photosensitive material P. ing. The driving roller 21 a of the receiving roller pair 21 is rotationally driven by a driving force from a motor (not shown) connected to the control unit 7. On the other hand, the driven roller 21b is switched to either the clamping position or the release position based on a control signal from the control unit 7.

  The exposure conveyance roller pairs 25 and 26 are respectively arranged on the upstream side and the downstream side of the exposure position, and can convey the photosensitive material P at the exposure position at a constant speed. The pair of exposure transport rollers 25 and 26 can take either a clamping position where the photosensitive material P is sandwiched between the driving rollers 25a, 26a and the driving rollers 25a, 26a or an opening position where the photosensitive material P is not sandwiched. Each has driven rollers 25b and 26b. The driving rollers 25 a and 26 a of the exposure transport roller pair 25 and 26 are rotationally driven by a driving force from a motor (not shown) connected to the control unit 7. On the other hand, the driven rollers 25 b and 26 b are switched to either the clamping position or the opening position based on a control signal from the control unit 7.

  Next, operations when the photosensitive material P is transported through the paper transport unit 10 and the exposure transport unit 20 will be described with reference to FIG. FIG. 3 is a diagram illustrating an operation when the photosensitive material P is transported through the paper transport unit and the exposure transport unit.

  The photosensitive material P drawn out from the magazine 8 is conveyed by the introduction roller pair 11 and, as shown in FIG. 3A, the photosensitive material P is exposed at the timing when the leading end portion of the photosensitive material P is sent out from the delivery roller pair 13 by a set amount. The feeding of the material P is stopped, and the leading end of the photosensitive material P is clamped by the clamping unit 14a of the chucker device 14. FIG. 3 schematically illustrates how the photosensitive material P is sandwiched by the sandwiching portion 14 a of the chucker device 14.

  Then, the carrier 14b moves toward the exposure conveyance unit 20 with the leading end portion of the photosensitive material P being clamped by the clamping unit 14a, and at this moving speed, the photosensitive material P is formed by the introduction roller pair 11 and the delivery roller pair 13. P is sent out downstream. Then, as shown in FIG. 3B, the leading end portion of the photosensitive material P sandwiched by the sandwiching portion 14a is fed between the driving roller 21a of the receiving roller 21 and the driven roller 21b. At this time, the receiving roller 21 and the exposure conveyance roller pairs 25 and 26 are in an open state.

  As described above, when the leading end portion of the photosensitive material P is fed into the receiving roller 21 and the leading end portion of the photosensitive material P is sandwiched between the sandwiching portions 14a, the introduction roller pair 11 and the delivery roller pair 13 are rotationally driven. The photosensitive material P transported above the loop forming region L is loosened above the transport path by the curl, and comes into contact with the two rotating rollers 18 as shown in FIG. .

  Then, a downward force is applied to the portion where the photosensitive material P is in contact with the two rotating rollers 18, whereby the waist of the photosensitive material P is folded and the photosensitive material P becomes slacked below the conveyance path. Thereafter, when the introduction roller pair 11 and the delivery roller pair 13 are rotationally driven, a slack of the photosensitive material P is formed in the loop forming region L as shown in FIG.

  When a predetermined amount of slack is formed in the loop formation region L, as shown in FIG. 3 (e), the leading end portion of the photosensitive material P is clamped by the receiving roller pair 21, and the clamping portion 14a Is released, the driven roller 21b of the receiving roller pair 21 is moved to the clamping position, and the receiving roller pair 21 is switched to the clamping state. Thereafter, the leading end portion of the photosensitive material P is sandwiched by the receiving roller pair 21, and the conveyance of the photosensitive material P is started.

  When the leading end of the photosensitive material P is fed between the driving roller 25a and the driven roller 25b of the exposure conveying roller pair 25 as shown in FIG. 3 (f), exposure is performed as shown in FIG. 3 (g). The driven roller 25b of the conveying roller pair 25 is moved to the nipping position, the exposure conveying roller pair 25 is switched to the nipping state, and the driven roller 21b of the receiving roller pair 21 is moved to the open position, and is nipped by the receiving roller pair 21. Is released.

  Subsequently, the photosensitive material P is transported by sandwiching the leading end portion of the photosensitive material P by the exposure transport roller pair 25. At this time, the exposure process for the photosensitive material P conveyed by the exposure conveyance roller pair 25 is started. When the leading end portion of the photosensitive material P is fed between the driving roller 26a and the driven roller 26b of the exposure conveyance roller pair 26, the driven roller 26b of the exposure conveyance roller pair 26 as shown in FIG. Moves to the clamping position, and the exposure transport roller pair 26 is switched to the clamping state. The exposure process for the photosensitive material P is continuously performed on the photosensitive material P transported by the exposure transport roller pairs 25 and 26 even after the exposure transport roller pair 26 is switched to the sandwiched state.

  At this time, the receiving roller pair 21 is in an open state. The introduction roller pair 11 and the delivery roller pair 13 are synchronously driven at a speed synchronized with the conveyance by the exposure conveyance roller pairs 25 and 26, so that the slack of the photosensitive material P formed in the loop forming region L is a predetermined amount. Maintained.

  When the exposure process for the photosensitive material P is performed, when the cut position of the photosensitive material P reaches the cutting position of the cutter 12, the introduction roller pair 11 and the delivery roller pair 13 are temporarily stopped, and FIG. ), The photosensitive material P is cut by the cutter 12. Here, immediately before the photosensitive material P is cut, the driven roller 21b of the receiving roller pair 21 moves to the holding position, and the receiving roller pair 21 is switched to the holding state.

  When the cutting of the photosensitive material P is finished, as shown in FIG. 3J, the driven roller 21b of the receiving roller pair 21 is moved to the open position, and the receiving roller pair 21 is switched from the sandwiched state to the open state. Subsequently, the photosensitive material P conveyed by the exposure conveyance roller pair 25 and 26 is subjected to exposure processing, and the photosensitive material P is conveyed by the delivery roller pair 13. Thereafter, immediately before the rear end portion of the photosensitive material P passes through the feed roller pair 13, the driven roller 21b of the receiving roller pair 21 moves to the nipping position as shown in FIG. It is switched from the open state to the clamping state.

  While the rear end portion of the photosensitive material P is transported through the loop formation region L, the receiving roller pair 21 is maintained in a sandwiched state as shown in FIG. At this time, it is preferable that the receiving roller pair 21 transports the photosensitive material P at the same speed as the exposure transport roller pairs 25 and 26. Thereafter, when the rear end portion of the photosensitive material P passes through the loop forming region L as shown in FIG. 3 (m), the driven roller 21b of the receiving roller pair 21 moves to the open position, and the receiving roller pair 21 is nipped. Switch from state to open state.

  Subsequently, exposure processing is performed on the photosensitive material P conveyed by the exposure conveyance roller pairs 25 and 26, and immediately before the rear end portion of the photosensitive material P passes through the exposure conveyance roller pair 25 as shown in FIG. Then, the driven roller 25b of the exposure transport roller pair 25 moves to the open position, and the exposure transport roller pair 25 is switched from the pinched state to the open state. Thereafter, an exposure process is performed on the photosensitive material P transported by the exposure transport roller pair 26. When the exposure process on the vicinity of the rear end portion of the photosensitive material P is completed as shown in FIG. 26 driven rollers 26b are moved to the open position, and the exposure transport roller pair 26 is switched from the pinched state to the open state. Thereafter, the photosensitive material P that has been subjected to the exposure process is transported by the roller pair 32 of the connecting portion C on the downstream side of the exposure transport unit 20. At this time, the photosensitive material P for which the exposure processing has been completed is not sandwiched between the exposure conveyance sections 20, and can be conveyed at a relatively high speed by the roller pair 32 of the connection section C.

  In the present embodiment, when the exposure process is performed on the photosensitive material P in the exposure unit 28, the receiving roller 21 is normally open. The receiving roller is just before the photosensitive material P is cut, just before the rear end portion of the photosensitive material P passes through the feed roller pair 13 and while the rear end portion of the photosensitive material P is conveyed through the loop forming region L. 21 is switched to the clamping state. In this way, by shortening the time for holding the photosensitive material P by the receiving roller 21 as much as possible, the photosensitive material P on which the exposure processing is performed is not only held between the exposure transport roller pairs 25 and 26 but also received. Occurrence of conveyance unevenness by being sandwiched between the rollers 21 is suppressed. Further, the conveyance force of the receiving roller 21 may be smaller than the conveyance force of the exposure conveyance roller pair 25 and 26. In this case, the conveyance variation at the exposure position is reduced, and the image quality is improved.

  As described above, in the photographic processing apparatus 1 according to the present embodiment, when the photosensitive material P is cut by the cutter 12 while the exposure process is being performed by the exposure unit 28, the feeding roller By forming a slack portion of the photosensitive material P between the pair 13 and the receiving roller pair 21, the vibration of the photosensitive material P at the time of cutting is attenuated by the slack portion, and immediately before the photosensitive material P is cut, Since the receiving roller pair 21 sandwiches the photosensitive material P, the vibration of the photosensitive material P at the time of cutting by the cutter 12 is not easily transmitted to the photosensitive material P on which the exposure process is performed. Accordingly, a reduction in image quality due to vibration of the photosensitive material P at the time of cutting is suppressed.

  Further, since the receiving roller pair 21 sandwiches the photosensitive material P immediately before the rear end portion of the photosensitive material P passes the delivery roller pair 13, even when the rear end portion of the photosensitive material P flutters. Further, the vibration of the rear end portion of the photosensitive material P is hardly transmitted to the photosensitive material P on which the exposure process is performed. Accordingly, a decrease in image quality due to vibration of the rear end portion of the photosensitive material P is suppressed.

  Further, when the exposure process is performed while the photosensitive material P is sandwiched between the exposure conveyance roller pairs 25 and 26, immediately before the photosensitive material P is cut, the rear end portion of the photosensitive material P sets the delivery roller pair 13. The receiving roller pair 21 is in an open state except immediately before passing and while the rear end portion of the photosensitive material P is conveyed through the loop forming region L. Therefore, normally, the photosensitive material P that has been subjected to the exposure process is sandwiched only by the exposure transport roller pairs 25 and 26. Therefore, the exposure process is performed on the photosensitive material P that is sandwiched by many pairs of rollers. A reduction in image quality is suppressed.

  Further, while the rear end portion of the photosensitive material P is transported through the loop forming region, the receiving roller pair 21 holds the photosensitive material, and therefore the rear end portion of the photosensitive material P flutters during this time. However, the deterioration of the image quality due to the vibration of the rear end portion of the photosensitive material P is surely suppressed.

  The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various design changes can be made as long as they are described in the claims. . For example, in the above-described embodiment, immediately before the photosensitive material P is cut, immediately before the rear end portion of the photosensitive material P passes through the feed roller pair 13, and the rear end portion of the photosensitive material P is conveyed through the loop forming region L. The receiving roller 21 is switched to the sandwiched state only while the photosensitive material P is held, but the receiving roller 21 may be switched to the sandwiched state only immediately before the photosensitive material P is cut, or the rear end of the photosensitive material P. It may be just before the section passes the feed roller pair 13.

  In the above-described embodiment, the photosensitive material P is slackened between the delivery roller pair 13 and the receiving roller pair 21, and immediately before the rear end of the photosensitive material P passes through the delivery roller pair 13. While the rear end portion of the photosensitive material P is transported through the loop forming region L, the receiving roller 21 is switched to the nipping state, but the rear end of the photosensitive material P is not formed even if the slack of the photosensitive material P is formed. The deterioration of the image quality due to the vibration of the part is suppressed.

1 is a diagram showing a schematic configuration of a photographic processing apparatus according to an embodiment of the present invention. It is a figure which shows the structure of the paper supply part of the photographic processing apparatus of FIG. 1, and an exposure conveyance part. It is a figure which shows operation | movement in case the photosensitive material P is conveyed through a paper conveyance part and an exposure conveyance part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Photo processing apparatus 7 Control part 10 Paper supply part 11 Introduction roller pair 12 Cutter 13 Delivery roller pair 20 Exposure conveyance part 21 Reception roller pair 25 Exposure conveyance roller pair 26 Exposure conveyance roller pair 28 Exposure part

Claims (6)

An exposure unit that performs an exposure process on the photosensitive material;
A pair of exposure conveyance rollers that can be conveyed while sandwiching the photosensitive material, and govern the conveyance speed of the photosensitive material at the exposure position by the exposure unit,
A cutting section for cutting the photosensitive material on the upstream side in the transport direction from the exposure section;
On the downstream side of the cutting portion in the conveyance direction, a pair of delivery rollers capable of nipping and conveying the photosensitive material,
A receiving roller pair disposed between the feed roller pair and the exposure transport unit, and capable of taking either a sandwiched state in which the photosensitive material is sandwiched or an open state in which the photosensitive material is not sandwiched;
In a state where a slack portion is formed in at least a part of the photosensitive material conveyed between the sending roller pair and the receiving roller pair, the receiving roller pair is in an open state and is conveyed by the exposure conveying roller pair. When the photosensitive material is cut at the cutting portion when the exposure processing is performed on the photosensitive material, the receiving roller pair is held immediately before the photosensitive material is cut. And a control means for switching to a photographic processing apparatus.   The control means switches the receiving roller pair to the clamping state immediately before the rear end portion of the photosensitive material is not clamped by the feeding roller pair when the receiving roller pair is in an open state. Item 2. The photographic processing apparatus according to Item 1.   3. The control unit according to claim 2, wherein when the receiving roller pair is in a sandwiched state, the receiving roller pair is switched to an open state after a photosensitive material is sandwiched between the exposure transport roller pair. The photographic processing apparatus as described. A slack formation region of the photosensitive material is provided in at least a part between the sending roller pair and the receiving roller pair,
When the receiving roller pair is in an open state, the control means maintains the receiving roller pair in a sandwiched state while the rear end portion of the photosensitive material is conveyed through the slack formation region. The photographic processing apparatus according to claim 3. An exposure unit that performs an exposure process on the photosensitive material;
A pair of exposure conveyance rollers that can be conveyed while sandwiching the photosensitive material, and govern the conveyance speed of the photosensitive material at the exposure position by the exposure unit,
A cutting section for cutting the photosensitive material on the upstream side in the transport direction from the exposure section;
A receiving roller pair that is disposed between the cutting unit and the exposure transport unit and can take either a sandwiched state in which a photosensitive material is sandwiched or an open state in which a photosensitive material is not sandwiched;
A feed roller pair disposed between the cutting portion and the receiving roller pair, capable of sandwiching and transporting a photosensitive material;
Control means for switching the receiving roller pair to the clamping state immediately before the rear end portion of the photosensitive material is not clamped by the feeding roller pair when the receiving roller pair is in the open state. Photo processing device. A slack formation region of the photosensitive material is provided in at least a part between the sending roller pair and the receiving roller pair,
When the receiving roller pair is in an open state, the control means maintains the receiving roller pair in a sandwiched state while the rear end portion of the photosensitive material is conveyed through the slack formation region. The photographic processing apparatus according to claim 5.

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