JP4385530B2 - Guide conveying mechanism and photo processing apparatus provided with the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a guide conveyance mechanism for conveying an image holding medium supplied from or supplied to an image processing mechanism for forming or reading an image along a guide member.
[0002]
[Prior art]
In a photographic processing apparatus, after an exposure process is performed on photographic paper, it is transported and subjected to processes such as development. Further, as the photographic paper, a long photographic paper wound in a roll shape may be used. In this case, the long photographic paper is cut into a predetermined length, subjected to an exposure process, and then transported by a transport mechanism. Further, the transport mechanism includes a guide transport mechanism provided with a guide member for regulating the direction of the paper.
[0003]
Here, an example of the guide conveyance mechanism of the photographic processing apparatus is shown in FIG. FIG. 6A is a diagram illustrating a state where the driving rollers 120a, 120b, and 120c of the guide conveyance mechanism and the pressure-bonding rollers 121a, 121b, and 121c are separated from each other. This guide transport mechanism is disposed downstream of the exposure unit for performing exposure processing, and can transport the photographic paper 102 by bending the transport direction by 90 °. The guide transport mechanism 118 includes three driving rollers 120a, 120b, and 120c that are arranged so that a part thereof protrudes from an opening (not shown) provided in the paper upper guide 119a and the paper lower guide 119b and the paper lower guide 119b. And three pressure rollers 121a, 121b, and 121c disposed to face the drive rollers 120a, 120b, and 120c, respectively. The pressure-bonding rollers 121a, 121b, and 121c can selectively take positions for pressure-bonding to the driving rollers 120a, 120b, and 120c and positions away from the driving rollers 120a, 120b, and 120c. , 120b, 120c, a portion projects from an opening (not shown) provided in the paper upper guide 119a. The driving rollers 120a, 120b, and 120c and the pressure-bonding rollers 121a, 121b, and 121c are generally made of rubber in order to ensure a sufficient conveying force.
[0004]
[Problems to be solved by the invention]
However, in the guide transport mechanism 118 as described above, as shown in FIG. 6B, which is an enlarged view of the entrance portion (the portion surrounded by a round frame in FIG. 6A), the photographic paper 102 In some cases, the front end may get caught in the driving roller 120a protruding from the opening of the paper lower guide 119b. In particular, when the photographic paper 102 that has been wound in a roll shape is used, the leading edge of the photographic paper 102 is often curled, and this frequently causes the drive roller 120a to be caught. . As described above, when the leading edge of the photographic paper 102 enters between the driving roller 120a and the pressure roller 121a and is caught by the rubber driving roller 120a, the exposure unit on the upstream side of the guide conveying mechanism is used. There is a problem that banding such as occurrence of unevenness of shading on the photographic paper 102 due to a double exposure due to a change in the conveyance speed of the photographic paper 102 or a gap in the exposed portion occurs. In addition, after the leading edge of the photographic paper 102 passes between the driving roller 120a and the pressure roller 121a, a portion other than the leading edge of the photographic paper 102 comes into contact with the surface of the driving roller 120a, and the photographic paper 102 is contacted with the driving roller 120a. Even when the frictional force is applied, banding may occur due to this.
[0006]
Further, the above-described problem occurs not only when an image is formed including exposure of photographic paper or printing by a printer, but also when an image is read by a scanner or the like.
[0007]
  Accordingly, an object of the present invention is to suppress the occurrence of banding in an image processing mechanism that forms or reads an image.guideIt is to provide a transport mechanism.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, the guide conveying mechanism according to claim 1 is an image processing mechanism for forming or reading an image.Arranged downstream from the image processing mechanism and supplied from the image processing mechanism.A first state in which an image holding medium can be sandwiched and a first state where the image holding medium can be transported; and a first state and a second transport roller that can selectively take a second state that is separated from the first state; First and second guide members arranged to face each other in order to regulate the direction of conveyance;Until the leading edge of the image holding medium supplied from the image processing mechanism reaches between the first and second transport rollers, both the first transport roller and the second transport roller are the first and second transport rollers. The second and second guide rollers are in a second state where they do not protrude toward the guide member facing each other, and the leading edge of the image holding medium supplied from the image processing mechanism is the first and second transport rollers. At least a portion of the first transport roller and at least a portion of the second transport roller protrude toward the guide member facing each of the first and second guide members. To be in the first state at the position toPosition control means for controlling the position of at least one of the first transport roller and the first guide member and the position of at least one of the second transport roller and the second guide member; It is characterized by having.
[0009]
  Claim 1guideThe transport mechanism is downstream of the image processing mechanism.On the sideIn the case of being arranged, at least a part of the first transport roller and the second transport roller is in a first state where the first transport roller protrudes with respect to the corresponding guide member, and a second state where the first transport roller and the second transport roller do not protrude together. When the first transport roller and the second transport roller are in the second state, the state can be selectively switched.guideThe image holding medium supplied from the upstream side of the transport mechanism can be introduced into the guide transport mechanism. As a result, it is possible to suppress the occurrence of banding in the image processing mechanism due to the image holding medium on which an image is formed or read by the image processing mechanism being caught by the first transport roller or the second transport roller. In addition, after the image holding medium is introduced into the guide conveyance mechanism, the first conveyance roller and the second conveyance roller are set in the first state, so that the gap between the first conveyance roller and the second conveyance roller is set. The sandwiched image holding medium can be transported by the guide member while restricting the transport direction.
[0010]
Here, the image processing performed on the image holding medium in the image processing mechanism includes forming an image on the image holding medium or reading an image formed on the image holding medium. . Banding in the image processing mechanism means that an image is formed at the same position on the image holding medium due to a change in the conveyance speed of the image holding medium in the image processing mechanism, and an image at the same position on the image holding medium. When the image is formed on the image holding medium, a portion where the image is not formed is generated in the image, and when the formed image is read on the image holding medium, a portion where the image is not read is generated. This indicates a problem related to image processing in the image processing mechanism.
[0011]
3. The guide conveying mechanism according to claim 2, wherein the position control means has the image holding medium on which an image is formed or read by the image processing mechanism between the first and second conveying rollers. Sometimes the first and second transport rollers are not in the first state.
[0012]
According to the second aspect, when the image holding medium is sandwiched between the first and second transport rollers, the image forming mechanism has already finished forming or reading the image. Even if it is slightly displaced, banding does not occur in the image processing mechanism due to the displacement.
[0013]
The guide transport mechanism according to claim 3 is characterized in that a member whose position is controlled by the position control means is urged in a displacement direction by an elastic member. According to the third aspect, the mechanism for moving the transport roller or the guide member can be simplified.
[0014]
According to a fourth aspect of the present invention, the one of the first and second transport rollers that is the driving roller is fixed, and the first and second guide members are disposed on the driving roller side. The provided position is controlled by the position control means.
[0015]
According to the fourth aspect of the present invention, the structure of the rotational drive system of the drive roller can be simplified by fixing the drive roller.
[0016]
A fifth aspect of the present invention is a photographic processing apparatus provided with the above-described guide conveyance mechanism. According to the fifth aspect, since the photographic paper as the image holding medium can be stably conveyed without being caught by the first conveyance roller and the second conveyance roller, banding occurs in the exposure unit as the image processing mechanism. Can be suppressed. As a result, a high-quality print can be output.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a photographic processing apparatus provided with a guide transport mechanism according to an embodiment of the present invention.
[0018]
First, a schematic configuration of a photographic processing apparatus provided with a guide conveyance mechanism of the present embodiment will be described with reference to FIG. In the photographic processing apparatus 1 shown in FIG. 1, the long photographic paper 2 drawn out from the paper magazine 11 is cut by the cutter 12 along the width direction so as to have a predetermined length. A desired character is printed by the printing unit 13 on the surface (back surface) of the cut photographic paper 2 where the photosensitive emulsion layer is not formed.
[0019]
An exposure unit 14 is disposed on the downstream side of the printing unit 13. The exposure unit 14 performs exposure processing based on digital image data on the photographic paper 2 that is a photosensitive material, and is a PLZT print in which light from an exposure light source unit (not shown) is guided through an optical fiber. A head 15 is provided. In the PLZT print head 15, an optical shutter made of a PLZT crystal whose birefringence changes according to an applied voltage is used as a light emitting dot in a direction perpendicular to the width direction of the photographic paper 2, that is, the conveyance direction of the photographic paper 2 (the paper surface of FIG. It is arranged one-dimensionally in the vertical direction). Further, at a position facing the PLZT print head 15, two pairs of transport rollers 16a and 16b for transporting the photographic paper 2 are arranged symmetrically with the exposure position interposed therebetween. Therefore, by controlling the conveyance timing of the photographic paper 2 by the conveyance roller pair 16a, 16b and the optical shutter opening / closing timing of the PLZT print head 15 based on the digital image signal relating to the latent image to be formed on the photographic paper 2, The photosensitive emulsion surface of the photographic paper 2 can be line exposed to form a latent image of a desired image.
[0020]
A guide transport mechanism 18 is disposed on the downstream side of the exposure unit 14. The guide transport mechanism 18 is used to transport the photographic paper 2 by bending the transport direction by 90 °. Details of the guide transport mechanism 18 will be described later.
[0021]
A paper sorting unit 30 is disposed on the downstream side of the guide transport mechanism 18. The paper sorting unit 30 is used to sort the photographic paper 2 that has been transported in one row so far into two or more rows and to allow the photographic paper 2 to be transported in parallel downstream.
[0022]
On the downstream side of the paper distribution unit 30, a delivery conveyance unit 31 for delivering the photographic paper 2 discharged therefrom to the processing liquid unit 32 is disposed. In the processing liquid section 32, the exposed photographic paper 2 is subjected to processing such as development, bleaching and stabilization. As a result, the latent image on the photographic paper 2 formed by exposure is made visible.
[0023]
Next, the detailed structure of the guide transport mechanism according to the present embodiment will be described with reference to FIGS. FIG. 2 is a diagram schematically showing a state (first state) where the pressure roller is in a position where it is pressure bonded to the drive roller in the guide conveyance mechanism shown in FIG. FIG. 3 is a top view of the guide transport mechanism shown in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5A is a diagram schematically illustrating a state (second state) in which the pressure roller is located away from the driving roller in the guide conveyance mechanism illustrated in FIG. 1. FIG. 5B is an enlarged view of the entrance portion (portion surrounded by a round frame in FIG. 5A) of the guide transport mechanism shown in FIG.
[0024]
As shown in FIGS. 2 and 5 (a), the guide transport mechanism 18 includes a plate-like paper upper guide 19a and a paper lower guide 19b which are bent 90 ° so as to be gently curved and are paired up and down. , Three drive rollers 20a, 20b, and 20c arranged on the lower right side of the paper lower guide 19b (here, used to include a shaft that supports the drive rollers. Similarly, in the following description, "drive roller" ”And the like, it may be used to include a shaft), and three pressure rollers arranged on the upper left side of the paper upper guide 19a and respectively facing the three driving rollers 20a, 20b, and 20c. 21 a, 21 b, 21 c (here, used to include a shaft that supports this. Similarly, in the following description, “pressure roller” If, and a is sometimes used to include the meaning shaft) such.
[0025]
The paper upper guide 19a is fixed to frames 28 provided on the left and right at both ends. The paper upper guide 19a is provided with openings (not shown) having a width smaller than the diameter of the pressure rollers 21a, 21b, and 21c at positions facing the three pressure rollers 21a, 21b, and 21c, respectively.
[0026]
The paper lower guide 19b serves as a guide support portion 19c by bending one end portion on the frame 28 side obliquely downward to the right in FIG. 2 and 4, a pin 25 protruding in the same direction as the shaft 23 is fixed near the lower end of the guide support portion 19c. Furthermore, two holes 26a and 27a are provided in the guide support portion 19c, and pins 26 and 27 fixed to the frame 28 are fitted into the holes 26a and 27a, respectively. One end of the coil spring 24 is locked to the pin 25, and the other end of the coil spring 24 is locked to the pin 26. The pin 25 is always urged by the coil spring 24 in the upper left direction in FIG. Has been. Thereby, the paper lower guide 19b can move in the direction of arrow A shown in FIG. 2 against the elastic force of the coil spring 24 by applying an external force in the direction of pushing and extending the coil spring 24 together with the guide support portion 19c. Further, by releasing the external force, the coil spring 24 can move in the arrow B direction shown in FIG.
[0027]
The paper lower guide 19b is provided with openings (not shown) having widths smaller than the diameters of the drive rollers 20a, 20b, and 20c at positions facing the three drive rollers 20a, 20b, and 20c, respectively. Accordingly, when the paper lower guide 19b is displaced in the direction of the arrow A, a part of the drive rollers 20a, 20b, 20c fixed to the frame 28 (portions facing the pressure rollers 21a, 21b, 21c) is applied to the paper lower guide 19b. It protrudes from the provided opening.
[0028]
As shown in FIG. 3, the pressure rollers 21a, 21b, and 21c are supported by the pressure roller holder 29 at both ends thereof. In addition to the pressure rollers 21a, 21b, and 21c, the pressure roller holder 29 is provided with a position adjusting pin 22 and a shaft 23 extending in parallel therewith. The pressure roller holder 29 can be rotated around the shaft 23 by a drive source (not shown). Therefore, with the rotation of the pressure roller holder 29, the pressure rollers 21a, 21b, and 21c partially protrude from the opening provided in the paper upper guide 19a toward the paper lower guide 19b (see FIG. 2). And a position that does not protrude from the opening toward the paper lower guide 19b (see FIG. 5). The frame 28 has holes (not shown) for enabling displacement by rotation of the pressure-bonding rollers 21a, 21b, and 21c.
[0029]
Further, with the rotation of the pressure roller holder 29, the tip of the position adjusting pin 22 presses the paper lower guide 19b in the lower right direction in FIG. Since the pressing force of the paper lower guide 19b by the position adjustment pin 22 resists the elastic force of the coil spring 24, the paper lower guide 19b is displaced in the direction of arrow A, and as described above, one of the drive rollers 20a, 20b, 20c. The part protrudes from the opening provided in the paper lower guide 19b. The frame 28 has a hole for allowing displacement by rotation of the pressure roller holder 29.
[0030]
At this time, the pressing rollers 21a, 21b, and 21c projecting from the opening provided in the paper upper guide 19a toward the paper lower guide 19b are connected to the paper upper guide from the opening provided in the paper lower guide 19b as shown in FIG. The drive rollers 20a, 20b, and 20c protruding to the 19a side are respectively pressure-bonded. In a state (first state) in which the pressure-bonding rollers 21a, 21b, 21c and the driving rollers 20a, 20b, 20c are pressure-bonded, the photographic paper 2 can be sandwiched between the two and conveyed downstream. On the other hand, when the pressure-bonding rollers 21a, 21b, and 21c and the driving rollers 20a, 20b, and 20c are not pressure-bonded (second state), the photographic paper 2 is sandwiched between the two and conveyed. I can't. Thus, according to the guide conveyance mechanism 18 of the present embodiment, the pressure-bonding rollers 21a, 21b, 21c and the driving rollers 20a, 20b, 20c can selectively take the first state and the second state. When the photographic paper 2 is supplied to the guide transport mechanism 18, the second state is set in advance so that the photographic paper 2 can be taken into the guide transport mechanism 18 without giving a large impact. Banding (double exposure by scanning exposure and exposure line omission) is less likely to occur. The rotation timing of the pressure roller holder 29 is appropriately controlled by a control unit (not shown) in accordance with the length of the photographic paper 2 and the conveyance speed.
[0031]
Next, the operation of the guide transport mechanism 18 according to the present embodiment will be described.
[0032]
The photographic paper 2 subjected to the exposure processing in the exposure unit 14 is supplied to the entrance of the guide transport mechanism 18 by the transport roller pair 16 a of the exposure unit 14. At this time, as shown in FIG. 5A, the pressure rollers 21a, 21b, and 21c are in positions (second state) away from the drive rollers 20a, 20b, and 20c, and the pressure rollers 21a, 21b, and 21c are Similarly, the drive rollers 20a, 20b, and 20c do not protrude from the opening provided in the paper lower guide 19b. Therefore, as shown in FIG. 5B, the leading end of the photographic paper 2 supplied from the exposure unit 14 does not get caught in the driving rollers 20a, 20b, 20c or the pressure rollers 21a, 21b, 21c, and the inside of the guide conveying mechanism 18. To be introduced.
[0033]
Then, as the shaft 23 is rotated at a predetermined timing, the pressure rollers 21a, 21b, 21c move in the direction toward the drive rollers 20a, 20b, 20c, and as shown in FIG. 2, the pressure rollers 21a, 21b , 21c protrudes from an opening provided in the paper upper guide 19a. Further, as the shaft 23 rotates, the position adjusting pin 22 moves the paper lower guide 19b toward the drive rollers 20a, 20b, and 20c in the direction of arrow A, so that a part of the drive rollers 20a, 20b, and 20c is made of paper. It protrudes from the opening provided in the lower guide 19b toward the paper upper guide 19a. The prints sandwiched between the pressure-bonding rollers 21a, 21b, and 21c protruding from the opening provided in the paper upper guide 19a and the driving rollers 20a, 20b, and 20c protruding from the opening provided in the paper lower guide 19b. The paper 2 is conveyed to the paper distribution unit 30 along the paper upper guide 19a and the paper lower guide 19b as the driving rollers 20a, 20b, and 20c rotate.
[0034]
When the conveyance of the single photographic paper 2 to the paper distribution unit 30 is completed, the shaft 23 rotates in the reverse direction so that the pressure rollers 21a, 21b, and 21c do not protrude from the opening provided in the paper upper guide 19a. Return to. Further, since the position adjusting pin 22 is displaced in a direction away from the paper lower guide 19b, the paper lower guide 19b is displaced in the arrow B direction due to the elastic restoring force by the coil spring 24. Therefore, as shown in FIG. 5A again, the drive rollers 20a, 20b, and 20c do not protrude from the paper upper guide 19a.
[0035]
Further, in the guide conveyance mechanism 18 of the present embodiment, in principle, the drive rollers 20a, 20b, 20c and the pressure roller when the leading edge of the photographic paper 2 is conveyed to an intermediate position between the drive roller 20a and the pressure roller 21a. The shaft 23 is rotationally driven so that 21a, 21b, and 21c are pressure-bonded. However, when the photographic paper 2 on which the exposure processing is performed in the exposure unit 14 is between the driving rollers 20a, 20b, and 20c and the pressing rollers 21a, 21b, and 21c, the driving rollers 20a, 20b, and 20c and the pressing rollers 21a and 21b are arranged. , 21c is controlled so that the rotational drive timing of the shaft 23 does not become the first state shown in FIG. This control is performed based on the length of the photographic paper 2, the conveyance speed, and the like. For this reason, in the present embodiment, even if the photographic paper 2 is slightly displaced due to the pressure-bonding impact between the driving rollers 20a, 20b, and 20c and the pressure-bonding rollers 21a, 21b, and 21c, no banding occurs due to the displacement.
[0036]
As described above, according to the guide transport mechanism 18 of the present embodiment, the leading edge of the photographic paper 2 supplied from the exposure unit 14 is prevented from being caught by the drive rollers 20a, 20b, 20c or the pressure rollers 21a, 21b, 21c. Therefore, banding in the exposure unit 14 due to this can be suppressed. Thereby, a high-quality photographic print can be output.
[0037]
Further, since the driving rollers 20a, 20b, and 20c and the pressure rollers 21a, 21b, and 21c sandwich the photographic paper 2 that is being exposed in the exposure unit 14 and do not press the band, banding caused by an impact applied to the photographic paper 2 at the time of pressure bonding Can be suppressed.
[0038]
Further, in the guide transport mechanism 18 of the present embodiment, the paper lower guide 19b is urged in the displacement direction by the elastic force of the coil spring 24, so the mechanism for displacing the paper lower guide 19b is simplified. ing.
[0039]
Further, in the guide transport mechanism 18 of the present embodiment, the drive rollers 20a, 20b, and 20c are fixed and the lower paper guide 19b is displaced, so that the displacement of the drive rollers 20a, 20b, and 20c is changed. It is not necessary to move the rotational drive system in accordance with. Therefore, the structure of the rotational drive system of the drive rollers 20a, 20b, and 20c is simplified.
[0040]
  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. Is something.
[0041]
In the above-described embodiment, the paper lower guide 19b moves with respect to the drive rollers 20a, 20b, and 20c, and the pressure-bonding rollers 21a, 21b, and 21c move with respect to the paper upper guide 19a. Not limited to this, the drive rollers 20a, 20b, 20c move with respect to the paper lower guide 19b, and the paper rollers 19a, 21b, 21c move the paper upper guide 19a. The relative position between 20c and the paper lower guide 19b and the relative position between the pressure rollers 21a, 21b and 21c and the paper upper guide 19a are changed, so that the driving rollers 20a, 20b and 20c and the pressure rollers 21a, 21b and 21c are changed. Are respectively a paper lower guide 19b and a paper upper guide 19a. As long as it can take a position not located or projections projecting from the provided opening it may have any configuration.
[0042]
Further, in the above-described embodiment, the position adjusting pin 22, the shaft 23 and its driving source, the guide support portion 19c, the control unit (not shown), etc. constitute the position adjusting means, but the position adjusting means is different from these. It may be configured as follows.
[0043]
In the above-described embodiment, the paper lower guide 19b is urged away from the drive rollers 20a, 20b, and 20c by the elastic force of the coil spring 24. You may be urged | biased by the direction approaching drive roller 20a, 20b, 20c by elastic force.
[0044]
Further, in the above-described embodiment, the paper lower guide 19b is configured to move by the elastic force of the coil spring 24. However, the configuration is not limited thereto, and the paper upper guide 19a is configured to move by the elastic force of the coil spring. There may be. Further, an elastic member other than the coil spring may be used.
[0045]
In the above-described embodiment, the guide transport mechanism 18 provided in the photo processing apparatus is shown. However, the guide transport mechanism of the present invention is not limited to the photo processing apparatus, and an image is printed or read. The present invention can be applied to any device (for example, a scanner, an inkjet printer, etc.) in which the image holding medium is guided and conveyed.
[0046]
【The invention's effect】
  As explained above, in claim 1guideThe transport mechanism is downstream of the image processing mechanism.On the sideIn the case of the arrangement, it is possible to suppress the occurrence of banding in the image processing mechanism due to the image holding medium on which an image is formed or read by the image processing mechanism being caught by the first transport roller or the second transport roller. The In addition, after the image holding medium is introduced into the guide conveyance mechanism, the first conveyance roller and the second conveyance roller are set in the first state, so that the gap between the first conveyance roller and the second conveyance roller is set. The sandwiched image holding medium can be transported by the guide member while restricting the transport direction.
[0047]
According to the second aspect, when the image holding medium is sandwiched between the first and second transport rollers, the image forming mechanism has already finished forming or reading the image. Even if it is slightly displaced, banding does not occur in the image processing mechanism due to the displacement.
[0048]
According to the third aspect, the mechanism for moving the transport roller or the guide member can be simplified. According to the fourth aspect of the present invention, the structure of the rotational drive system of the drive roller can be simplified by fixing the drive roller. According to the fifth aspect, it is possible to suppress the occurrence of banding in the exposure unit as the image processing mechanism, so that it is possible to output a high-quality print.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of a photographic processing apparatus provided with a guide conveyance mechanism according to an embodiment of the present invention.
FIG. 2 is a diagram schematically illustrating a structure in a state in which the pressure roller is in a position for pressure bonding to a driving roller in the guide conveyance mechanism shown in FIG. 1;
FIG. 3 is a top view of the guide transport mechanism shown in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
5A is a diagram schematically illustrating the structure in a state where the pressure roller is located away from the drive roller in the guide transport mechanism shown in FIG. 1, and FIG. It is the figure which expanded the entrance part of the conveyance mechanism.
6A is a diagram schematically illustrating a structure in a state in which the pressure roller is located away from the driving roller, and FIG. 6B is a guide transport mechanism in a conventional guide transport mechanism. It is the figure which expanded the entrance part.
[Explanation of symbols]
1 Photo processing device
2 photographic paper
11 Paper magazine
12 Cutter
13 Printing unit
14 Exposure unit
15 PLZT print head
16a, 16b Conveying roller pair
18 Guide transport mechanism
19a Paper guide
19b Paper Lower Guide
20a, 20b, 20c Driving roller
21a, 21b, 21c pressure roller
22 Position adjustment pin
23 Support member
24 Coil spring
28 frames
29 Pressure roller holder
30 Paper sorting section
31 Delivery conveyor
32 Treatment liquid part

Claims (5)

A first state that is arranged downstream of an image processing mechanism that forms or reads an image and that can sandwich and convey an image holding medium supplied from the image processing mechanism , and is separated from the first state. First and second transport rollers that can selectively take the second state,
First and second guide members disposed opposite to each other to regulate a direction in which the image holding medium is conveyed;
Until the leading edge of the image holding medium supplied from the image processing mechanism reaches between the first and second transport rollers, both the first transport roller and the second transport roller are the first and second transport rollers. The second and second guide rollers are in a second state where they do not protrude toward the opposite guide member side, and the leading edge of the image holding medium supplied from the image processing mechanism is the first and second transport rollers. At least a portion of the first transport roller and at least a portion of the second transport roller project toward the guide member facing each of the first and second guide members. such that the first state in the position of the first conveying roller and the first guide member of at least one said the one of the position the second conveying roller and the second Guide transport mechanism, characterized in that it comprises a position control means for controlling at least one of the positions of the id member.   When the image holding medium on which an image is formed or read by the image processing mechanism is between the first and second transport rollers, the position control means is configured to move the first and second transport rollers. The guide transport mechanism according to claim 1, wherein the guide transport mechanism is not in the first state.   3. The guide transport mechanism according to claim 1, wherein the member whose position is controlled by the position control means is urged in the displacement direction by an elastic member.   Of the first and second transport rollers, the one serving as the driving roller is fixed, and the position of the first and second guide members provided on the driving roller side is the position control means. The guide transport mechanism according to any one of claims 1 to 3, wherein the guide transport mechanism is controlled by the control unit.   A photographic processing apparatus comprising the guide conveyance mechanism according to claim 1.

Images