JP2001092034A - Photographic paper carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photographic paper carrying device which avoids deformation of a pressing roll for exposure which is caused when waiting for photographic paper to be exposed. SOLUTION: A first carrying roll unit 80A for exposure and a second carrying roll unit 80B for exposure are provided, and the first carrying roll unit 80A for exposure includes a first driving roll 81 for exposure, which is arranged above an exposure head 5a in order to pressing and carrying photographic paper 2 when exposing the photographic paper by the exposure head 5a, and a first pressing roll 82 for exposure which can be displaced from a pressing position where it is brought into contact with the first driving roll to a press release position where it is separated from the first driving roll, and the second carrying roll unit 80B for exposure includes a second driving roll 83 for exposure arranged below the exposure head 5a and a second pressing roll 84 for exposure which can be displaced from a pressing position, where it is brought into contact with the second driving roll, to a press release position, and first and second pressing rolls for exposure are forcibly displaced to press release positions when waiting for the photographic paper to be exposed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a first exposure device arranged upstream of the exposure head in the transport direction of the exposure head for pressing and transporting the photographic paper during exposure of the photographic paper by an exposure head for exposing an image on the photographic paper. A first exposure transport roller unit including a drive roller and a first exposure pressure roller, a second exposure drive roller arranged downstream of the exposure head for pressure transport of the photographic paper during exposure of the photographic paper, and a second exposure transport roller. The present invention relates to a photographic paper transport device including a second exposure transport roller unit including an exposure pressure bonding roller.

[0002]

2. Description of the Related Art In recent years, photographic paper exposure using an optical print head has been adopted as an exposure head such as a digital minilab (photo printing apparatus). At this time, an optical print head whose exposure range extends in the main scanning direction is used. The light is fixed by a first exposure / transport roller unit and a second exposure / transport roller unit including an exposure drive roller and an exposure pressure roller disposed on both sides of the optical print head (upstream and lower sides in the photographic paper transport direction). The photographic paper is transported in the sub-scanning direction orthogonal to the main scanning direction of the print head, and line exposure is sequentially performed.
Surface exposure of the entire image has been completed. In such a photographic paper transport device, the photographic paper being exposed is carried over from the first exposure transport roller unit to the second exposure transport roller unit. For example, in a conventional photographic paper transporting device as disclosed in Japanese Patent Application Laid-Open No. 9-15768, before the photographic paper reaches the first exposure transporting roller unit, the first exposure pressure roller is ready for receiving the photographic paper. To maintain the state of being pressed against the first exposure driving roller by a spring force, and when the photographic paper enters, the first exposure pressure roller is pressed against the spring force by the penetration pressure of the photographic paper. After being displaced, the photographic paper is nipped and pressure-conveyed toward the second exposure / conveyance roller unit. Similarly, the second exposure pressure roller is
Before the photographic paper reaches the second exposure / conveyance roller unit, the photographic paper is kept in contact with the second exposure drive roller by a spring force as a preparation for receiving the photographic paper. When the photographic paper is delivered, the second exposure pressure bonding roller is displaced against the spring force by the photographic paper, and the photographic paper is nipped and pressure-conveyed as it is.

[0003]

However, in the photographic paper transport apparatus as described above, the exposure pressure roller during standby, which is ready to receive photographic paper, always presses the exposure drive roller. It has become. For this reason, the surface of the exposure pressure roller tends to be deformed, and if the photographic paper is transported on the deformed surface, the photographic paper cannot be transported with high accuracy, and the exposure quality is degraded. In order to avoid this, even if a hard material that does not easily deform is used for the roller surface, the familiarity between the exposure pressure roller and the photographic paper will worsen, and high-precision photographic paper transport cannot be expected. The quality will be reduced. In view of the above situation, an object of the present invention is to provide a photographic paper transport device that avoids deformation of an exposure pressure roller that occurs during standby for waiting for photographic paper to be exposed.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a photographic paper transport apparatus according to the present invention includes a photographic paper transporting apparatus for compressing and transporting photographic paper during exposure of photographic paper by an exposure head for exposing an image to photographic paper. A first exposure drive roller disposed upstream of the exposure head in the transport direction, and a first exposure drive roller that can be displaced between a pressure contact position in contact with the first exposure drive roller and a pressure release position separated from the first exposure drive roller. A first exposure transport roller unit including a first exposure pressure roller, a second exposure drive roller arranged downstream of the exposure head for pressure transport of the photographic paper during exposure of the photographic paper, and a second exposure drive roller And a second exposure / conveyance roller unit including a second exposure / compression roller displaceable between a pressure / contact position contacting with the second exposure driving roller and a pressure / release release position separated from the second exposure driving roller. To the to standby awaiting the printing paper first exposure pressing rollers and the second exposure pressing rollers is displaced forcibly the pinch release position.

In this configuration, the first exposure pressure roller and the second exposure pressure roller are forcibly displaced to the pressure release position during standby for waiting for photographic paper to be exposed. Since the pressing of the roller does not occur, the surface of the exposure pressure bonding roller is not deformed, and stable photographic paper conveyance and, as a result, stable exposure quality are realized.

In order to forcibly displace the first exposure pressure roller and the second exposure pressure roller to the pressure release position, in a preferred embodiment of the present invention, a first rotary cam for determining the first displacement position is provided. A cam mechanism including a body and a second rotating cam body for determining the displacement of the second exposure / compression roller, and cam control means for controlling rotation angles of the first and second rotating cam bodies. By controlling the rotation angles of the first and second rotary cam bodies, the first and second exposure pressure bonding rollers are quickly and accurately set from the pressure bonding position to any position of the pressure bonding release position including the pressure bonding release position. can do.

Further, if the first rotary cam body and the second rotary cam body are provided concentrically, the cam operating system can be made compact by using both a rotating shaft and a drive source. This is an important advantage considering that the cam operating system must be located around the exposure head. Also,
If the first rotating cam body and the second rotating cam body are configured to be able to be switched to rotate integrally or to rotate relative to each other, the first rotating cam body and the second rotating cam body may be switched. The combination of the displacements of the first exposure pressure roller and the second exposure pressure roller created by the rotation control is rich in variety, and this is because even if the cam shape of each rotary cam body is simple. Open the way to create many displacement patterns.

For example, as a preferred embodiment, a first rotating cam body and a second rotating cam body are formed by forming an arc-shaped recess formed on one of the rotating cam bodies and the other. By connecting with a connecting means consisting of a pin that moves in the recess formed in the rotating cam body,
The first rotary cam body and the second rotary cam body are connected so as to be integrally rotatable and relatively rotatable. That is, when one of the rotary cams continues to rotate in the predetermined direction, the two rotary cams rotate integrally as a result of the pins abutting against the ends of the concave portions, and the first rotary cam and the second rotary cam rotate. The body rotates together. However, in this state, even if one of the rotating cams rotates in the opposite direction within the range in which the pin moves through the recess, the pin only moves along the recess and the other rotating cam remains stopped. As a result, the relative position between the first rotating cam body and the second rotating cam body changes, and the rotational angle positions of the first rotating cam body and the second rotating cam body, which were not realized during the one-way rotation described above,
As a result, a displacement pattern of the first and second exposure pressure bonding rollers can be realized. Other features and advantages according to the present invention will become apparent from the following description of embodiments with reference to the drawings.

[0009]

FIG. 1 is a schematic block diagram of a printer processor known as a so-called digital minilab. The exposure unit of the digital minilab employs a digital exposure system. Here, a film for reading a photographed image from an image frame of a photographic film (hereinafter simply referred to as a film) 1 developed by a film developing machine (not shown) is used. A scanner 3, a controller 7 for processing digital image data read through the film scanner 3 to generate print data, and an exposure head 5 a for exposing an image corresponding to a frame image to the photographic paper 2 based on the print data. And a development processing unit 6 for developing the exposed photographic paper 2. The photographic paper 2 developed by the development processing section 6 is discharged as a finished print through a drying process.

The film scanner 3 includes, as main components, an illumination optical system 30, an imaging optical system 40, a photoelectric conversion unit 50 using a line CCD sensor 51 as a photoelectric conversion element,
An automatic film mask 10 is provided for determining the irradiation range of the film 1 and for transporting the film 1 in the sub-scanning direction for scanning by a line CCD sensor.

The illumination optical system 30 includes a halogen lamp 31 as a white light source, a light control filter 32, and a mirror tunnel 3.
3 irradiates the film 1 with the color distribution and intensity distribution of the light beam from the light source adjusted. An imaging optical system 40 for processing a transmitted light beam from the film 2 includes a lens unit 41 and a mirror 42 for changing the direction of light.

The photoelectric conversion unit 50 for photoelectrically converting the light beam guided by the image pickup optical system 40 includes three CCD sensors 51a, 51b, and 51c assigned as line CCD sensors 51 for detecting each color of RGB. Each CCD sensor has a large number (for example, 5000) of C
CD elements are arranged in the main scanning direction, that is, in the width direction of the film 1. A color filter that allows only the red component of the light transmitted through the film 1 to pass through the imaging surface of the red CCD sensor 51a, and allows only the green component of the light that has passed through the film 1 to pass through the imaging surface of the green CCD sensor 51b. A color filter is provided on the imaging surface of the blue CCD sensor 51c so as to pass only the blue component of the light transmitted through the film 1, and performs photoelectric conversion of only the blue, red, and green components, respectively. .

When the frame image of the film 1 is positioned at the scan position set in the auto film mask 10, the reading process of the frame image is started, and the transmitted light of the frame image is transmitted by the film transport mechanism 9 to the film 1. By the feeding, three CCD sensors 51a, 51b, and 51c sequentially read, but since each CCD sensor is arranged at intervals of several pixels along the transport direction of the film 1, R, R There is a time difference between the detection timings of the G and G component colors. This is due to the signal processing at the subsequent stage of the photoelectric conversion unit 50.
The image signals are stored in a predetermined memory of the controller 7 in association with each other. Such control of the illumination optical system 30, the imaging optical system 40, and the photoelectric conversion unit 50 of the film scanner 3 is performed by the controller 7.

In this embodiment, the digital printing section 5 employs a PLZT shutter system. That is, a shutter array including a PLZT element is employed as the exposure head 5a. The shutter array composed of this PLZT element is made of a transparent ferroelectric ceramic material obtained by adding lanthanum to lead zirconate titanate, and utilizes the electro-optic effect of the material. Light of each color of R, G, and B is introduced from the light source 5b via many optical fibers. The shutter array extends in the width direction of the photographic paper 2, that is, in the transverse direction of the transport direction. When a predetermined level of voltage is applied to each shutter, it enters a light transmitting state,
When the application of the voltage is stopped, the light is cut off. Therefore, when a drive voltage is applied to the shutter corresponding to each pixel from the controller 7 based on the print data, the shutter is opened and light of the color introduced from the light source is irradiated on the printing paper 2. The light source 5b has R, G, B
A rotation filter composed of color optical filters is provided, and by controlling the rotation phase of this rotation filter,
One of R, G, and B selectively faces the light source, and light of the selected color is sent to the shutter through an optical fiber through a filter of that color. In addition to the PLZT shutter method, a liquid crystal shutter method, a fluorescent beam method, a FOCRT method, a DMD (digital micromirror device) method, and the like are known as the method of the digital print section. Can be.

Since the digital printing section 5 can simultaneously expose each of the cut photographic papers 2 arranged in two rows,
The photographic paper transport line 8 is divided into a photographic paper supply line 8A that transports the cut photographic paper 2 in a single row, an exposure transport line 8B that can transport the cut photographic paper 2 in two rows, and a development transport line 8C. Paper supply line 8A and exposure transport line 8
B, a sorting device 4 for sorting the photographic paper 2 sequentially sent from the photographic paper supply line 8A to each row of the exposure transport line 8B is provided.

The photographic paper supply line 8A is selectively provided from one of the two photographic paper magazines 2A and 2B which house the photographic paper 2 in a roll shape with the emulsion side facing out.
And a pre-distribution transport unit that transfers the photographic paper 2 to the distribution device 4.

A paper cutter 12 for cutting the photographic paper 2 drawn from the photographic paper magazine 2A or 2B in accordance with the print size is provided at the upstream end of the pre-sorting transport section. Is provided. The back print section 13 is provided on the back side (non-emulsion side) of the photographic paper 2.
It prints a film ID, a frame number, and correction information indicating image processing performed at the time of print data creation, and a dot-in-packed printer is usually used.

The exposure transport line 8B is arranged in the order of the transport direction.
An intermediate transport roller unit 80C that forms two rows of carry-in areas of the exposure transport line 8B, a first exposure transport roller unit 80A on the entrance side arranged to sandwich the exposure head 5a of the digital printing unit 5, and a second exposure roller unit 80A on the exit side. The first exposure / conveyance roller unit 80A, which has a significant effect on the exposure quality,
The second exposure transport roller unit 80B on the outlet side is manufactured with high precision as an integrated unit as the exposure photographic paper transport device 80.

As shown in FIG. 2, the first exposing / conveying roller unit 80A includes a first exposing driving roller 81 contacting the non-emulsion side of the cut photographic paper 2 and the first exposing driving roller 81.
A second exposure driving roller 83 which contacts the non-emulsion surface side of the cut photographic paper 2, and a second exposure driving roller 83 that can be displaced in distance
An exposure pressure roller 84 is provided. The first and second exposure drive rollers 81 and 83 are synchronously driven by a single drive pulley 89 connected to a motor via a belt transmission mechanism 89a. The first and second exposure pressure bonding rollers 82 and 84 are opposed by exposure driving rollers 81 and 83 by the cam mechanism 60.
Are displaced independently of each other with respect to
The photographic paper 2 is formed by only the exposure and conveyance roller unit 80A, only by the second exposure and conveyance roller unit 80B, and further by both the first and second exposure and conveyance roller units 80A and 80B.
Can be transported.

The sorting device 4 includes a paper cutter 12
The photographic paper 2 cut by the above-described method is configured to include a chucker-type XY moving mechanism that receives the photographic paper 2 and alternately transfers the photographic paper 2 to the left and right row positions of the intermediate conveyance roller unit 80C. Of course, when handling a wide large photographic paper 2, exposure is performed in one row. Therefore, the photographic paper 2 received from the photographic paper supply line 8A is simply used as it is in the intermediate transport roller unit 80C.
Just hand it over.

Next, the photographic paper transporting device 80, particularly the cam mechanism 60, will be described in detail with reference to FIGS. Both ends of the rotation shaft 85a of the first exposure pressure bonding roller 82 are supported by the housing 80a so as to be swingable around a swing axis 87a so that the first exposure pressure bonding roller 82 can be displaced toward and away from the first exposure driving roller 81. Of the swing arm 86a. Similarly, both ends of a rotating shaft 85b of the second exposure pressure bonding roller 84 are supported by a swing arm 86b supported by a housing 80a so as to be swingable around a swing shaft center 87b. Due to this swing, the first and second exposure pressure bonding rollers 82 and 84 become the first and second exposure driving rollers 81 and 8.
3 can be displaced from the pressure-bonding position where the photographic paper 2 passing through the photographic paper 2 is pressed to the full pressure-bond release position where the photographic paper 2 is completely separated from the photographic paper 2. The swing arms 86a and 86b
Are urged by springs 88 to displace the first and second exposure pressure rollers 82 and 84 in the pressure direction.

The first and second exposure pressure bonding rollers 82 and 84
The cam mechanism 60 for oscillating displacement includes a first rotating cam body 61 for the first exposure pressure roller 82 and a second exposure pressure roller 8.
The second rotary cam body 62 for four and a support shaft 65 for supporting these rotary cam bodies in a freely rotatable manner. A bearing (not shown) includes a support shaft 65 and each of the rotary cam bodies 61 and 6.
It is interposed between the two. A first eccentric cam is formed by rolling a cam surface formed on the peripheral surface of the first rotary cam body 61.
First cam follower 63 that follows the movement of rotary cam body 61
Is attached to the end of the extension that extends to one side of the rotating shaft 85a. In order to perform a similar function, a second cam follower 64 that follows the movement of the second rotary cam body 62 is also attached to the end of the extension that extends to one side of the rotary shaft 85b of the second exposure pressure bonding roller 84. I have.

First rotating cam body 61 and second rotating cam body 62
Are arranged side by side in the axial direction and have a connecting means 68, here a pin 68a and a recess 68 for receiving the pin 68a.
b are connected to each other. That is, the pin 68a
Is provided on the side of the first cam body 61 facing the second cam body 62, and a recess 68 is formed in the side surface of the second cam body 62 so that the free end of the pin 68a can enter.
b is formed. The recess 68b is an arc-shaped groove centered on the axis of the support shaft 65 and has a length having a central angle of about 270 degrees.

The second rotating cam body 62 of the first rotating cam body 61
On the opposite side is a gear section 66 for a timing belt.
The rotational displacement of the cam operation pulse motor 67 controlled by the cam control means 70 constructed in the controller 7 is transmitted to the gear section 66 via the timing belt transmission mechanism 69. Since the concave portion 68b is an arc centered on the axis of the support shaft 65, the relative rotation between the first rotary cam body 61 and the second rotary cam body 62 is limited to the extent that the pin 68a moves inside the concave portion 68b. It is forgiving. When the first rotating cam body 61 moves in one direction,
As long as the pin 68a rotates in the counterclockwise direction (the direction of arrow A), the first rotating cam body 61 and the second rotating cam body 62 always rotate integrally with the pin 68a by abutting on the end of the recess 68. Therefore, the rotation angle positions of the first rotary cam body 61 and the second rotary cam body 62 do not deviate, but if necessary, the first rotary cam body 61 can be rotated from one direction to a length not more than the length of the recess 68b. When the rotation in the reverse direction is performed by a predetermined amount, the relative positions of the first rotary cam body 61 and the second rotary cam body 62 change, and the first rotary cam body 61 and the second rotary A combination pattern of the rotation angle positions of the cam body 62, and consequently, a combination pattern of the first and second exposure pressure bonding rollers 82 and 84 at the near and far positions with respect to the printing paper 2 can be realized. In order to prevent the second rotary cam body 62 from rotating along with the reverse rotation of the first rotary cam body 61,
A pressing spring unit 65a is provided for realizing a frictional connection with a small force between the support shaft 65 and the second rotary cam body 62.

Next, operation schematic diagrams of FIGS. 6 to 11 and FIG.
First and second rotating cam bodies 61, 6 according to the transport position of the photographic paper 2 to be exposed using the rotation angle chart of FIG.
2 and the first and second exposure pressure bonding rollers 82 and 84
Will be described. The rotation angle chart of FIG. 12 shows the first rotation cam body 61 and the second rotation cam body 62.
In the above, the position of the predetermined cam surface is defined as a reference position RP, and a position where the first and second cam followers 63 and 64 face the reference position RP is set to a rotation angle of 0 ° and changes with rotation. It shows changes in the diameters of the first and second rotary cam bodies 61 and 62 as eccentric cams, and the amount of displacement with respect to the corresponding exposure drive roller (range from the pressed state to the completely released state).

First, when the exposure step is started, the printing paper 2 to be exposed is conveyed by the intermediate conveyance roller unit 80C. 1 exposure drive roller 81
Is a complete press-release position with a distance of several millimeters from the reference position R. of the first rotary cam body 61.
This is realized by a rotation angle relationship where P contacts the first cam follower 63. In FIG. 12, this rotation angle is 0 °. Similarly, at this point, the reference position RP of the second rotary cam body 62 is in contact with the second cam follower 64, and the second exposure pressure roller 84 is the first exposure drive roller 83.
(See FIG. 6).

When the leading end of the photographic paper 2 enters the first exposure transport roller unit 80A, the first rotary cam 61 rotates counterclockwise, and when the rotation angle reaches 45 °, the first exposure pressure roller 82 is rotated. The printing paper 2 is displaced to the pressure bonding position and pressed against the first exposure drive roller 81 to pinch and convey the printing paper 2. Similarly, the second rotary cam body 62 also rotates, but since the diameter of the second rotary cam body 62 does not change in this rotation angle range, the second cam follower 64, and consequently the second
The exposure pressure roller 84 is not displaced and remains at the pressure position. However, the intermediate transport roller unit 80C finishes its role of transporting the photographic paper 2 and is brought into the pressure release state (see FIG. 7).

Further, the first and second rotary cam bodies 61, 62
Is rotated, and when the rotation angle reaches 90 °, the second exposure pressure roller 84 is displaced to the complete pressure release position, and the photographic paper is transported from the first exposure transport roller unit 80A to the second exposure transport roller unit. Prepare for delivery. Since the diameter of the first rotary cam body 61 does not change in this rotation angle range,
The first exposure pressure roller 82 is not displaced and remains at the pressure position, and the printing paper 2 is moved to the first exposure transport roller unit 80A.
Exposure is performed by the exposure head 5a while being transported (see FIG. 8).

When the leading end of the printing paper 2 enters the second exposure transport roller unit 80B, the first and second rotary cam bodies 61 and 62 are further rotated in order to displace the second exposure pressure roller 84 toward the pressure position. I do. As is apparent from FIG. 12, the second rotary cam body 62 has a rotation angle range of 90 ° to 25 °.
The diameter is reduced with a gentle inclination over the range of 0 °, and the second exposure pressure roller 84 gently presses the photographic paper 2, and the first exposure / conveyance roller unit 80 </ b> A causes the photographic paper 2 to be exposed and conveyed. Do not give a sudden load change. In the first rotating cam body 61, the rotation angle range 9
Since the diameter does not change over the range of 0 ° to 250 °, the first exposure pressure bonding roller 82 is not displaced and still remains at the pressure bonding position (see FIG. 9).

When the rotation angle of the first and second rotary cam bodies 61 and 62 reaches 250 °, the second exposure pressure roller 84 is brought to the pressure position, and then the first exposure pressure roller 82 is moved to the minute pressure release position. (See FIG. 10). The minute pressure release position is different from the complete pressure release position in that the distance from the first exposure drive roller 81 is set to several tenths of a millimeter, and the photographic paper 2 being exposed is completely released. This is for the purpose of avoiding the resulting uneven exposure. As shown in FIG. 11, the displacement to the minute pressure bonding release position is realized when the rotation angle is about 290 °. By continuing the photographic paper conveyance as it is, the exposure of the photographic paper 2 is completed, and when the rear end of the photographic paper 2 passes through the second exposure and conveyance roller unit 80B,
The rotation angle of the first and second rotary cam bodies 61 and 62 is 360 °
, That is, the reference position RP returns to the original state in which it comes into contact with the respective cam followers 63 and 64, and one cycle of the photographic paper exposure conveyance is completed. Subsequently, when the next photographic paper 2 to be exposed is conveyed from the intermediate conveyance roller unit 80C, the above-described procedure is repeated again to perform a new photographic paper exposure conveyance.

When it is necessary to wait until the photographic paper 2 is conveyed due to an order change, a break in a print order, or the like, the rotation angles of the first and second rotary cam bodies 61 and 62 remain at 0 °. Then, the second exposure pressing roller 84 remains pressed against the second exposure driving roller 83, and the surface of the second exposure pressing roller 84 may be deformed. The standby mode in which both of the two-exposure pressure roller 84 are brought to the pressure release position is activated.

The operation of the standby mode will be described with reference to FIGS. 12, 13 and 14. In the standby mode, the rotation angle of the first and second rotary cam bodies 61 and 62 may be any angle other than 0 ° at this time. Is set to 0 °, and the state shown in FIG. 6 is obtained (# 10, # 11). Then the first and second
Rotating the rotating cam bodies 61 and 62 counterclockwise by 90 °,
The state shown in FIG. In this state, the first exposure pressure bonding roller 82 is at the pressure bonding position, but the second exposure pressure bonding roller 84 is in a completely released pressure bonding state (# 2).
0). Subsequently, the first rotating cam body 61 is rotated clockwise by rotating the cam operation pulse motor 67 in the reverse direction. Here, when the first rotating cam body 61 is rotated in the clockwise direction, the second rotating cam body 62 remains stationary only by the pin 68a moving within the recess 68b.
The first rotary cam body 61 is rotated until the rotation angle becomes minus 90 °, and eventually returns to 0 ° (# 30). Thus, the first exposure pressure bonding roller 82 and the second exposure pressure bonding roller 84 remain in the state shown in FIG. 13B, and both the first exposure pressure bonding roller 82 and the second exposure pressure bonding roller 84 are at the pressure release position. (# 40). The photographic paper 2 to be exposed next reaches the intermediate transport roller unit 80C and waits in this state until an exposure command instructing the start of an exposure cycle is generated (# 40). When the exposure command is issued, the cam operation pulse motor 67 is rotated in the normal forward direction, and the first rotary cam 61 is rotated by 360 °. 68a comes into contact with the end of the concave portion 68b, and the second rotary cam body 62 also rotates.
The second rotary cam bodies 61 and 62 are at the position of the rotation angle of 0 °, and are in the posture for receiving the photographic paper 2 conveyed from the intermediate conveyance roller unit 80C shown in FIG. 6 (# 5)
0). As a result, the standby mode ends, and the above-described photographic paper exposure transport cycle starts.

In the above embodiment, by rotating the first and second rotary cam bodies 61 and 62 relative to each other, both the first exposure pressure roller 82 and the second exposure pressure roller 84 are brought into the pressure release position. Mode was created, but the first
A cam surface was formed such that both the first exposure pressure bonding roller 82 and the second exposure pressure bonding roller 84 could create a pressure release position at any rotational angle position where the second rotary cam bodies 61 and 62 were integrally rotated. In this case, the first and second rotary cam bodies 6
It is not necessary to relatively rotate the first and second rotating cam bodies 62, and it is also possible to integrally form the first rotating cam body 61 and the second rotating cam body 62.

In the above-described embodiment, the photographic paper transport device capable of performing two-row exposure has been described as an example. However, the photographic paper transport device according to the present invention is not limited to this embodiment.
It can be configured as a photographic paper transport device for row exposure or as a photographic paper transport device with three or more rows.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a printer processor equipped with a photographic paper transport device according to the present invention.

FIG. 2 is an explanatory diagram illustrating a photographic paper transport line.

FIG. 3 is a side view of the photographic paper transport device.

FIG. 4 is a partial cross-sectional front view of the photographic paper transport device.

FIG. 5 is a schematic perspective view of a photographic paper transport device.

FIG. 6 is an operation schematic diagram illustrating a change in rotation angles of first and second rotary cam bodies and a change in displacement of first and second exposure pressure bonding rollers;

FIG. 7 is an operation schematic diagram illustrating a change in rotation angles of first and second rotary cam bodies and a change in displacement of first and second exposure pressure bonding rollers;

FIG. 8 is an operation schematic diagram illustrating a change in rotation angles of first and second rotary cam bodies and a change in displacement of first and second exposure pressure rollers.

FIG. 9 is a schematic operation diagram illustrating a change in the rotation angle of the first and second rotary cam bodies and a change in the displacement of the first and second exposure / compression rollers.

FIG. 10 shows the change in the rotation angle of the first and second rotating cam bodies and the first and second rotating cam bodies.
Operational schematic diagram for explaining displacement change of the second exposure pressure bonding roller

FIG. 11 shows the change in the rotation angles of the first and second rotary cam bodies and the first and second rotation cam bodies.
Operational schematic diagram for explaining displacement change of the second exposure pressure bonding roller

FIG. 12 is a rotation angle chart.

FIG. 13 is an operation schematic diagram showing the rotation angles of the first and second rotating cam bodies at which the first and second exposure pressure bonding rollers are at the release positions.

FIG. 14 is a flowchart of a standby mode.

[Explanation of symbols]

 2 photographic paper 5 digital printing section 5a exposure head 6 development processing section 7 controller 8 photographic paper transport device 8A photographic paper supply line 8B exposure transport line 8C developing transport line 60 cam mechanism 61 first rotating cam body 62 second rotating cam body 63 1st cam follower 64 2nd cam follower 65 support shaft 67 pulse motor for cam operation 68 connecting means 68a pin 69b recess 70 cam control means 71 cam control unit 72 LUT 80A first exposure transport roller unit 80B second exposure transport roller unit 80C intermediate transport Roller unit 81 First exposure drive roller 82 First exposure pressure roller 83 Second exposure drive roller 84 Second exposure pressure roller

Claims (5)

[Claims] A first exposure drive roller disposed upstream of the exposure head in the transport direction of the exposure head to press and transport the photographic paper during exposure of the photographic paper by an exposure head for exposing an image on the photographic paper; A first exposure transport roller unit including a pressure roller; a second exposure drive roller and a second exposure pressure roller disposed downstream of the exposure head for pressure transport of the photographic paper during exposure of the photographic paper. A photographic paper transport device comprising a second exposure transport roller unit, wherein the first exposure pressure roller is a pressure release position that is in contact with the first exposure drive roller and a pressure release position that is separated from the first exposure drive roller. And the second exposure pressure roller can be displaced between a pressure position in contact with the second exposure drive roller and a pressure release position separated from the second exposure drive roller. A photographic paper transporting apparatus wherein the first exposure pressure roller and the second exposure pressure roller are forcibly displaced to the pressure release position during standby for waiting for photographic paper to be exposed. 2. A cam mechanism including a first rotating cam body for determining a displacement position of the first exposure pressure bonding roller and a second rotating cam body for determining a displacement of the second exposure pressure bonding roller;
2. The photographic paper transport device according to claim 1, further comprising a cam control means for controlling a rotation angle of the second rotary cam body. 3. The photographic paper transport device according to claim 2, wherein said first rotary cam body and said second rotary cam body are provided concentrically. 4. The photographic paper according to claim 3, wherein said first rotary cam body and said second rotary cam body are switchable between a state of integrally rotating and a state of relative rotation. Transport device. 5. The first rotary cam body and the second rotary cam body are formed in an arc-shaped recess formed in one of the rotary cam bodies and the other rotary cam body. 5. The photographic paper transporting device according to claim 4, wherein the photographic paper transporting device is connected so as to be integrally rotatable and relatively rotatable by a connecting means including a pin moving in the recess.