JP2006242985A - Image recorder and photosensitive material carrying method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a wasteful standby time, regarding an image recorder equipped with a loop forming means. <P>SOLUTION: An exposure carrying part 9 comprises a pair of 1st carrying rollers 40 and a pair of second carrying rollers 41, etc. A post-exposure carrying part 10 comprises a pair of third carrying rollers 53, a pair of fourth carrying rollers 54, a pair of fifth carrying rollers 55, a first carrying guide 56, and a second carrying guider 57, etc. As shown by (D) and (E) in Fig., just after finishing a scanning exposure operation, the first carrying guide 56 is closed, and the driven roller 53B of the pair of the third carrying rollers 53 comes in press contact with a cut printing paper 16, and the driven roller 41B of the pair of second carrying rollers 41 shifts to a retreat position. Even when the driven roller 41B shifts to the retreat position, the cut recording paper 16 with a loop formed never flow backward. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image recording apparatus that records an image by scanning exposure in an exposure unit while conveying a photosensitive material, and a photosensitive material conveying method for conveying the photosensitive material.

  2. Description of the Related Art There is known an image recording apparatus that photoelectrically reads an image photographed on a photographic film by an image reading device and scans and exposes a photosensitive recording paper (hereinafter referred to as recording paper) based on the read image data. Yes. In such an image recording apparatus, since scanning exposure is performed while transporting the recording paper, it is required to stably transport the recording paper with high accuracy. However, when the leading edge of the recording paper during scanning exposure hits the pair of conveyance rollers on the downstream side in the conveyance direction or is caught by a part of the conveyance guide, the vibration at this time is transmitted to the recording paper and recorded. Scanning unevenness may occur in the paper.

  In order to prevent scanning unevenness, a technique is known in which a loop is formed on a recording sheet on the downstream side in the transport direction of an exposure transport unit (see, for example, Patent Document 1). By absorbing the vibration with the formed loop, it is possible to prevent the vibration from being transmitted to the scanning exposure region of the recording paper. Moreover, since the conveyance path can be shortened by forming the loop, the apparatus can be miniaturized.

In the apparatus described in Patent Document 1, the recording paper is adjusted in accordance with the scanning exposure by the first exposure transport roller disposed on the upstream side in the transport direction from the scanning exposure position and the second exposure transport roller disposed on the downstream side in the transport direction. And a loop is formed downstream of the second exposure transport roller in the transport direction. The second exposure conveyance roller can be switched between a pressure contact state in which the recording paper is pressed and a pressure release state in which the pressure contact is released, and is switched to a pressure release state after the formed loop disappears. The operation of switching the second transport roller to the pressure release state is an exposure preparation operation necessary for receiving the next (second sheet) recording sheet and performing scanning exposure.
JP 2001-83609 A

  In the apparatus described in Patent Document 1, the second exposure transport roller cannot be switched to the press-release state until the loop disappears even after the scanning exposure of the first recording sheet is completed. If the second exposure transport roller is switched to the pressure release state immediately after the scanning exposure of the first recording sheet is completed, the trailing edge of the first recording sheet advances in the direction opposite to the transport direction, and the first sheet The trailing edge of the recording paper and the leading edge of the second recording paper overlap or approach each other even if they do not overlap, adversely affecting subsequent processing. For this reason, when scanning exposure is continuously performed on a plurality of recording papers, there is a problem in that a wasteful waiting time occurs and processing takes time.

  An object of the present invention is to provide an image recording apparatus that does not cause useless waiting time even when loop forming means is provided.

  The present invention relates to an image recording apparatus that records an image by scanning exposure at an exposure unit while transporting a photosensitive material, and is disposed downstream of the scanning exposure position in the transport direction and is in a pressure contact state and a pressure contact release state with respect to the photosensitive material. A first roller pair that conveys the photosensitive material in accordance with scanning exposure, a loop forming unit that forms a loop in the photosensitive material downstream of the first roller pair in the conveying direction, and the loop forming unit And a second roller pair that is brought into a pressure contact state and a pressure contact release state with respect to the photosensitive material on the upstream side in the transport direction and is switched to the pressure contact state after the scanning exposure is completed. Here, when scanning exposure is completed means that the rear end of the recording area of the photosensitive material has passed the scanning exposure position. In addition, the pressure-release state includes not only when the pressure-contact is completely released but also when the photosensitive material is pressed with a pressure-contact force that does not cause a load (that is, pressed with a weak pressure-contact force).

  The loop forming means is disposed on the downstream side in the transport direction of the first roller pair, and between a first position that forms a loop space on the transport path and a second position that guides the photosensitive material along the transport path. A first conveyance guide swingable around an axis provided at the upstream end, and a first position and a conveyance position that are arranged downstream of the first conveyance guide in the conveyance direction and form a loop space on the conveyance path Between a second position for guiding the photosensitive material along the path, a second conveyance guide swingable around an axis provided at the downstream end, and arranged downstream in the conveyance direction of the second conveyance guide The third roller pair preferably conveys the photosensitive material at a lower conveyance speed than the first roller pair. In particular, it is preferable that the upstream end portion of the first conveyance guide is in the vicinity of the first roller pair. Thereby, a loop can be formed from the vicinity of the first roller pair, and the conveyance path can be shortened.

  It is preferable that the second roller pair includes a driving roller provided in the apparatus main body and a driven roller provided in the first conveyance guide, and the driven roller is displaced together with the first conveyance guide. Thereby, since the drive source which displaces a 1st conveyance guide and a driven roller can be made shared, a structure can be simplified. Further, the second roller pair can be provided at an arbitrary position on the first conveyance guide, and the degree of freedom in design is increased. It is also possible to dispose the second roller pair away from the first roller pair. Here, by setting the distance between the first roller pair and the second roller pair to be approximately the same as the length in the conveyance direction of the smallest size photosensitive material, the number of roller pairs to be arranged can be suppressed.

  The present invention relates to a photosensitive material transport method for transporting a photosensitive material to be scanned and exposed by an exposure unit. The photosensitive material transport method is disposed on the downstream side of the scanning exposure position in the transport direction and takes a pressure contact state and a pressure contact release state with respect to the photosensitive material. The pair of rollers is switched to a pressure contact state as the leading edge of the photosensitive material passes between the rollers to convey the photosensitive material, and the photosensitive material is further downstream in the conveying direction than the first roller pair during scanning exposure. A second roller pair which is in a pressure contact state and a pressure contact release state with respect to the photosensitive material upstream of the loop in the transport direction is switched to the pressure contact state in accordance with the completion of scanning exposure, and the second roller The first roller pair is switched to the pressure release state when the pair is switched to the pressure contact state.

  According to the image recording apparatus of the present invention, the first roller pair that is disposed downstream of the scanning exposure position in the transport direction and that is in a pressure contact state and a pressure release state with respect to the photosensitive material and transports the photosensitive material in accordance with the scanning exposure. A loop forming means for forming a loop in the photosensitive material downstream of the first roller pair in the transport direction, and a pressure contact state and a pressure release state with respect to the photosensitive material upstream of the loop formed by the loop forming means in the transport direction And the second roller pair that can be switched to the pressure contact state after the scanning exposure is completed, and immediately after the completion of the scanning exposure, the second roller pair is switched to the pressure contact state to prevent the reverse feeding of the photosensitive material and the first roller pair It is possible to switch to the pressure contact release state. Since the exposure preparation operation for accepting the second photosensitive material can be performed immediately after the completion of the first scanning exposure, there is no wasteful waiting time even when scanning exposure is performed continuously, and it is quick. Can be processed.

  According to the photosensitive material conveyance method of the present invention, the leading edge of the photosensitive material passes between the rollers through the first roller pair that is disposed downstream of the scanning exposure position in the conveyance direction and takes a pressure contact state and a pressure release state with respect to the photosensitive material. In response to this, the photosensitive material is transported by switching to the pressure contact state, and a loop is formed in the photosensitive material downstream of the first roller pair in the transport direction during the scanning exposure, and the photosensitive material is transported upstream of the loop in the transport direction. On the other hand, the second roller pair that takes the pressure contact state and the pressure release state is switched to the pressure contact state when the scanning exposure is completed, and the first roller pair is changed to the pressure release state when the second roller pair is switched to the pressure contact state. Since the switching is performed, the second roller pair is switched to the press contact state in accordance with the completion of the scanning exposure to prevent the photosensitive material from being fed backward, and at the same time, the first roller pair can be switched to the press release state. Since the exposure preparation operation for accepting the second photosensitive material can be performed immediately after the completion of the first scanning exposure, there is no wasteful waiting time even when scanning exposure is performed continuously, and it is quick. Can be processed.

  As shown in FIG. 1, the image recording apparatus 2 includes a printer unit 3 and a processor unit 4. The printer unit 3 includes a magazine 5, a cutter device 6, a back printing device 7, an exposure device 8, an exposure transport unit 9, a post-exposure transport unit 10, and the like.

  In the magazine 5 is stored a recording paper roll 14 in which a long photosensitive recording paper (hereinafter referred to as recording paper) is wound around a core. When the magazine 5 is set in the printer unit 3, the conveyance roller pair 15 in the magazine 5 rotates and the photosensitive recording paper is pulled out from the recording paper roll 14. The cutter device 6 cuts the pulled-out photosensitive recording paper into a predetermined size to obtain a cut recording paper 16. In the figure, a one-dot chain line indicates a conveyance path for the cut recording paper 16.

  On the downstream side of the cutter device 6 in the transport direction, a back printing device 7 is provided. The back printing device 7 prints information such as a frame number and correction data on the back surface of the cut recording paper 16. An exposure device 8 is provided on the downstream side in the transport direction of the back printing device 7. The exposure device 8 incorporates a well-known laser printer. Based on the internal image data or image data transferred from an image reading device (not shown), the cut recording paper 16 is scanned and exposed to record an image as a latent image. To do.

  The exposure transport unit 9 transports the cut recording paper 16 in accordance with the scanning exposure. The post-exposure transport unit 10 takes over the transport of the cut recording paper 16 from the exposure transport unit 9 and transports the cut recording paper 16 to the processor unit 4. Details of the exposure conveyance unit 9 and the post-exposure conveyance unit 10 will be described later.

  The processor unit 4 includes a developing device 20, a drying device 21, and a sheet discharge device 22. The developing device 20 is provided with a developing tank 23, a bleach-fixing tank 24, and a water washing tank 25 in order from the upstream side in the transport direction. The rinsing tank 25 includes a first rinsing tank 26, a second rinsing tank 27, a third rinsing tank 28, and a fourth rinsing tank 29. A developing solution is stored in the developing tank 23, a bleach-fixing solution is stored in the bleach-fixing tank 24, and a predetermined amount of cleaning solution is stored in the water-washing tank 25. The cut recording paper 16 is transported in the processing tanks by transport racks 30, 31, and 32 provided in the developing tank 23, the bleach-fixing tank 24, and the rinsing tank 25, respectively, and each process of development, fixing, and washing is performed. Done.

  The drying device 21 is disposed above each processing tank and includes a conveyance belt and a blower duct. The blower duct blows dry air heated by a heater toward the conveyance belt, and presses the cut recording paper 16 toward the conveyance belt. By passing over the air duct in this state, the cut recording paper 16 is dried. The cut recording paper 16 that has passed through the drying device 21 is sent toward the sheet discharge device 22. In the sheet discharge device 22, the cut recording paper 16 is sorted according to the print size or print job, and discharged to the tray 33 provided in the processor unit 4.

  Below, the exposure conveyance part 9 and the post-exposure conveyance part 10 are demonstrated in detail. As shown in FIG. 2, the exposure transport unit 9 includes a first transport roller pair 40, a second transport roller pair (first roller pair) 41, a first detection sensor 42, a second detection sensor 43, and the like.

  The first transport roller pair 40 is disposed upstream of the exposure position where scanning exposure is performed by the exposure device 8 in the transport direction, and includes a driving roller 40A and a driven roller 40B. The driving roller 40 </ b> A rotates when the power of the motor 44 is transmitted via the belt 45. The driven roller 40B is displaced by a displacement mechanism 46 between a pressure contact position where the driven roller 40B is in pressure contact with the peripheral surface of the drive roller 40A and a retracted position away from the peripheral surface. The displacement mechanism 46 can not only switch the position of the driven roller 40B but also adjust the strength of the pressure contact force when the driven roller 40B is in pressure contact with the drive roller 40A.

  The second transport roller pair 41 is disposed downstream of the exposure position in the transport direction, and includes a drive roller 41A and a driven roller 41B. Power is transmitted to the driving roller 41A via the belt 48 that is stretched over the driving roller 40A, and the driving roller 41A rotates in synchronization with the driving roller 40A. Similarly to the driven roller 40B, the driven roller 41B is displaced between the pressing position and the retracted position by the displacement mechanism 49, and the strength of the pressing force is adjusted at the pressing position.

  The first detection sensor 42 is disposed on the upstream side in the transport direction of the first transport roller pair 40. The second detection sensor 43 is disposed between the first transport roller pair 40 and the second transport roller pair 41. Each of the detection sensors 42 and 43 detects the presence or absence of the cut recording paper 16 and sends a detection signal to the system controller 47. The system controller 47 controls the motor 44 and the displacement mechanisms 46 and 49 based on the detection signal.

  The post-exposure transport unit 10 includes a third transport roller pair (second roller pair) 53, a fourth transport roller pair 54, a fifth transport roller pair (third roller pair) 55, a first transport guide 56, and a second transport guide. 57, the third detection sensor 66, and the like.

  The third transport roller pair 53 includes a driving roller 53A and a driven roller 53B. The driving roller 53 </ b> A is rotated by the power of the motor 58 transmitted through the belt 59. The speed of the peripheral surface of the drive roller 53A is the same as the speed of the peripheral surfaces of the drive rollers 40A and 41A. The driven roller 53 </ b> B is attached to the first conveyance guide 56 and is displaced together with the first conveyance guide 56.

  The distance between the third conveyance roller pair 53 and the second conveyance roller pair 41 is set to be slightly shorter than the conveyance direction length of the smallest type of cut recording paper. The distance between the third conveyance roller pair 53 and the fourth conveyance roller pair 54 is also the same length. Thereby, the number of conveyance roller pairs arrange | positioned in the conveyance part 10 after exposure can be suppressed to the minimum necessary.

  The 1st conveyance guide 56 is arrange | positioned in the conveyance direction downstream of the 2nd conveyance roller pair 41, and cross-sectional shape is circular arc shape. The upstream end portion of the first transport guide 56 is close to the second transport roller pair 41, and a rotating shaft 56a is provided at the upstream end portion. The first transport guide 56 is swingable about a rotation shaft 56a by a displacement mechanism 60 including a motor 60a and an arm 60b. The first conveyance guide 56 rotates counterclockwise in the figure to create a loop space on the conveyance path and to allow the formation of the loop of the cut recording paper 16, and to rotate clockwise in the figure. The first recording position (second position) for guiding the leading edge of the cut recording paper 16 with the driven roller 53B slightly separated from the driving roller 53A, and cut recording with the driven roller 53B pressed against the driving roller 53A. The paper 16 is displaced between three positions of the second guide position (second position) for guiding the leading end of the paper 16.

  The fourth conveying roller pair 54 includes a driving roller 54A and a driven roller 54B. The driving roller 54A is rotated in synchronization with the driving roller 53A when the power of the motor 58 is transmitted through the belt 59. The driven roller 54 </ b> B is attached to the second conveyance guide 57 and is displaced together with the second conveyance guide 57.

  The 2nd conveyance guide 57 is arrange | positioned in the conveyance direction downstream of the 1st conveyance guide 56, and cross-sectional shape is circular arc shape. A rotary shaft 57 a is provided at the downstream end of the second transport guide 57. The second transport guide 57 is swingable about the rotation shaft 57a by a displacement mechanism 61 including a motor 61a and an arm 61b. A rotatable roller 57 b for smoothly transporting the cut recording paper 16 is provided at the upstream end portion of the second transport guide 57. The second conveyance guide 57 rotates clockwise in the figure to create a loop space on the conveyance path and to allow loop formation on the cut recording paper 16 (first position), and to rotate counterclockwise in the figure. The first recording position (second position) for guiding the leading end of the cut recording paper 16 with the driven roller 54B pressed against the driving roller 54A, and the cut recording paper 16 with the driven roller 54B pressed against the driving roller 54A. Displacement is made between three positions of the second guide position (second position) for guiding the front end of the first position.

  The fifth conveyance roller pair 55 is disposed on the downstream side in the conveyance direction of the second conveyance guide 57, and includes a driving roller 55A and a driven roller 55B. The drive roller 55 </ b> A is rotated by the power transmitted via the roller 62 and the belts 63 and 64. The speed of the peripheral surface of the drive roller 55A is made slower than the peripheral speed of the drive rollers 40A, 41A, 53A, 54A. The driven roller 55B is displaced between the pressing position and the retracted position by the displacement mechanism 65, and the strength of the pressing force is adjusted at the pressing position.

  The third detection sensor 66 is disposed on the downstream side in the transport direction with respect to the second transport guide 57. Similar to the first and second detection sensors 42 and 43, the third detection sensor 66 detects the presence or absence of the cut recording paper 16 and sends a detection signal to the system controller 47. The system controller 47 controls the motor 58, the displacement mechanisms 60, 61, 65 and the like based on each detection signal. The system controller 47 acquires information related to the conveyance direction length of the cut recording paper 16 being conveyed, calculates the loop amount necessary for the cut recording paper 16, and determines the loop formation position of each of the conveyance guides 56 and 57. I also do it.

  Hereinafter, the effect | action by the said structure is demonstrated using FIGS. 1-3. The cut recording paper 16 is conveyed to the exposure conveyance unit 9 via the back printing device 7. As shown in FIG. 3A, the driven roller 40B of the first transport roller pair 40 is in the pressure contact position, the driven roller 41B of the second transport roller pair 41 is in the retracted position, and the first and second transport guides 56, 57. The driven rollers 55B of the fifth conveying roller pair 55 are positioned at the retracted position, and the driven rollers are positioned at a first guide position where the driven rollers are slightly separated from the driving rollers. In addition, each drive roller of the exposure conveyance unit 9 and the post-exposure conveyance unit 10 starts to rotate.

  When the cut recording paper 16 is conveyed while being pressed against the first conveying roller 40 and the leading end of the cut recording paper 16 passes through the second detection sensor 43, the exposure device 8 starts scanning exposure. When the leading end of the cut recording paper 16 passes between the rollers of the second conveying roller 41, the driven roller 41B moves to the pressure contact position. Here, the pressure contact force of the driven roller 41B against the cut recording paper 16 is gradually increased. Thereby, since the load applied to the cut recording paper 16 does not change abruptly, vibration is not transmitted to the scanning exposure region, and scanning unevenness does not occur. The cut recording paper 16 is pressed against the first and second conveying roller pairs 40 and 41 and conveyed in accordance with the scanning exposure.

  The cut recording paper 16 is conveyed while being guided by the first and second conveyance guides 56 and 57. Since the cut recording paper 16 is conveyed on the rotating drive rollers 53A and 54A, it is smoothly conveyed. As shown in FIG. 3B, when the leading end of the cut recording paper 16 passes through the third detection sensor 66, the driven roller 55B of the fifth transport roller pair 55 moves to the pressure contact position. Here, similarly to the driven roller 41B, the driven roller 55B gradually increases the pressure contact force against the cut recording paper 16, so that the scanning unevenness does not occur.

  Thereafter, as shown in FIG. 3C, the first and second transport guides 56 and 57 move to the loop forming position. Since the conveyance speed of the cut recording paper 16 is slower in the fifth conveyance roller pair 55 than in the second conveyance roller pair 41, the cut recording paper between the second conveyance roller pair 41 and the fifth conveyance roller pair 55 is used. Sag occurs in 16 and a loop is formed. This loop absorbs vibration transmitted from the leading end of the cut recording paper 16 or the like.

  When the rear end portion of the cut recording paper 16 passes through the first detection sensor 42, the driven roller 40B of the first transport roller pair 40 moves to the retracted position. Here, the driven roller 40 </ b> B moves to the retracted position while gradually weakening the pressing force against the cut recording paper 16. For this reason, it is possible to reduce the load fluctuation when the rear end portion of the cut recording paper 16 is separated from the first conveying roller pair 40, and to prevent scanning unevenness.

  As shown in FIG. 3D, when the trailing edge of the cut recording paper 16 passes through the second detection sensor 43, the scanning exposure is stopped, and the first conveyance guide 56 moves the driven roller 53B to the pressure contact position. 2 Move to the guide position. Note that the first transport guide may be moved to the second guide position when the scanning exposure is completed on the entire recording area of the cut recording paper. Thereby, for example, when there is a margin around the image like an index print, the first conveyance guide can be moved at an earlier timing.

  Thereafter, as shown in FIG. 3E, the driven roller 41B of the second transport roller pair 41 moves to the retracted position, and the driven roller 40B of the first transport roller pair 40 moves to the pressure contact position. Here, in this embodiment, since the third conveyance roller pair 53 is held in pressure contact with the cut recording paper 16, the driven roller 41B of the second conveyance roller pair 41 is moved to the retracted position in a state where a loop is formed. Even if it is made, the back flow of the cut recording paper 16 does not occur. For this reason, preparations for receiving the next cut recording sheet can be rapidly advanced. When scanning exposure is continuously performed on a plurality of cut recording sheets, the time is shortened.

  As the loop shrinks, the second conveyance guide 57 moves to the second guide position where the driven roller 54B comes into pressure contact with the drive roller 54A. After the loop disappears, the first and second transport guides 56 and 57 move to the first guide position where each driven roller is slightly separated from each drive roller. Further, the driven roller 55B of the fifth conveying roller pair 55 moves to the retracted position. In parallel with the reduction of the loop, scanning exposure of the next cut recording sheet is started, and thereafter the above operation is repeated.

  In the above embodiment, the third conveying roller pair 53 presses the cut recording paper 16 immediately after the scanning exposure to hold the cut recording paper 16, but the third conveying roller pair 53 is shown in FIG. A pair of rollers 100 shown in the figure may be provided, and the cut recording paper 16 immediately after scanning exposure may be held by the pair of rollers 100. The roller pair 100 is disposed between the second transport roller pair 41 and the first transport guide 56, and includes a first roller 100A and a second roller 100B. The first roller 100A has a built-in one-way clutch that rotates only in the transport direction. The second roller 100B is moved by the displacement mechanism 101 between a pressure contact position where the second roller 100B is in pressure contact with the peripheral surface of the first roller 100A and a retreat position where the second roller 100B is retracted from the peripheral surface of the first roller 100A. Immediately after the scanning exposure, the roller pair 100 is brought into the pressure contact state, thereby preventing the back flow of the cut recording paper 16, and at the same time, the second transport roller pair 41 can be brought into the pressure release state.

  In the above-described embodiment, the driven rollers (for example, the driven rollers 40B, 41B, and 55B) of each pair of transport rollers are separated from the peripheral surface of the drive roller so that each pair of transport rollers is released from the pressure contact state. Each conveying roller pair may be brought into a pressure-release state by weakening the pressure-contacting force against Thus, the driven roller does not necessarily have to be separated from the driving roller. However, this is limited to cases where the influence on scanning exposure is small.

  In the above embodiment, two movable conveyance guides are provided, but the quantity may be arbitrary. Further, it is not always necessary to attach a driven roller to the transport guide.

1 is a schematic view of an image recording apparatus of the present invention. It is the schematic of an exposure conveyance part and a post-exposure conveyance part. It is explanatory drawing explaining the movement of a cut recording paper and each conveyance part. It is the schematic of the exposure conveyance part in another embodiment, and a post-exposure conveyance part.

Explanation of symbols

2 Image recording device 3 Printer unit 8 Exposure device 9 Exposure conveyance unit 10 Post-exposure conveyance unit 40 First conveyance roller pair 41 Second conveyance roller pair 53 Third conveyance roller pair 54 Fourth conveyance roller pair 55 Fifth conveyance roller pair 56 First transport guide 57 Second transport guide

Claims (4)

In an image recording apparatus for recording an image by scanning exposure at an exposure unit while conveying a photosensitive material,
A first roller pair that is disposed downstream of the scanning exposure position in the transport direction and takes the pressure contact state and the pressure release state with respect to the photosensitive material and transports the photosensitive material in accordance with the scanning exposure;
Loop forming means for forming a loop in the photosensitive material downstream of the first roller pair in the conveying direction;
A second roller pair that is in a pressure contact state and a pressure contact release state with respect to the photosensitive material upstream of the loop formed by the loop forming unit and is switched to the pressure contact state after scanning exposure is completed. A characteristic image recording apparatus. The loop forming means is disposed on the downstream side in the transport direction of the first roller pair, and between a first position that forms a loop space on the transport path and a second position that guides the photosensitive material along the transport path. A first conveyance guide swingable about an axis provided at the upstream end,
Between the first position that is arranged downstream of the first transport guide in the transport direction and forms a loop space on the transport path and the second position that guides the photosensitive material along the transport path, at the downstream end. A second transport guide swingable about a provided shaft;
2. The third roller pair disposed downstream of the second transport guide in the transport direction and configured to transport the photosensitive material at a transport speed slower than that of the first roller pair. Image recording device.   The second roller pair includes a driving roller provided in the apparatus main body and a driven roller provided in the first conveyance guide, and the driven roller is displaced together with the first conveyance guide. The image recording apparatus according to claim 2. In a photosensitive material transport method for transporting a photosensitive material scanned and exposed by an exposure unit,
The first roller pair, which is disposed downstream of the scanning exposure position in the conveying direction and takes the pressure contact state and the pressure release state with respect to the photosensitive material, is brought into the pressure contact state as the leading edge of the photosensitive material passes between the rollers. Switch to transport the photosensitive material,
Forming a loop in the photosensitive material downstream of the first roller pair in the conveying direction during the scanning exposure;
A second roller pair that takes a pressure contact state and a pressure release state with respect to the photosensitive material upstream of the loop in the transport direction, and switches to a pressure contact state in accordance with the completion of scanning exposure;
A method of conveying a photosensitive material, comprising: switching the first roller pair to a pressure released state in accordance with the switching of the second roller pair to the pressure contact state.

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