JPH11311841A - Photographic printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photographic printing device, specially a line exposure type photographic printing device where a compact photographic paper sorting mechanism is mounted. SOLUTION: A sorting mechanism 70 is provided with a press-contacting carrying part consisting of a feed roller 72 and a press-contact roller 75c capable of being shifted in an actuating posture where it is brought into press-contact with the feed roller 72, a main carrying guide 75a capable of being shifted in the actuating posture where a first photographic paper carrying line and a second photographic paper carrying line are connected and a branching carrying guide 76 capable of being shifted in the actuating posture where the first photographic paper carrying line and a branching photographic paper carrying line are connected. Also, the press-contact roller 75c and the main carrying guide 75a are simultaneously set to be in the actuating posture by being integrally shifted, and the branching carrying guide 76 is shifted in connection with the movement of the main carrying guide 75a, so that the branching carrying guide 76 is set to be in the actuating posture at the time of attaching and detaching the main carrying guide 75a from the actuating posture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a first photographic paper transport line provided with an exposure section for printing an image on photographic paper, and a second photographic paper connected to the first photographic paper transport line via a sorting mechanism. The present invention relates to a photographic printing apparatus including a paper transport line and a photographic paper branch line branched from the sorting mechanism.

[0002]

2. Description of the Related Art A photographic printing apparatus includes a photographic paper drawn out of a photographic paper storage unit (in this specification, photographic paper is handled as a photosensitive material, and photographic paper including other photosensitive materials is representative of the photosensitive material. Used as a name,
In the following description, photographic paper is simply called paper)
A photographic paper transport line is provided for printing an image on the photographic paper and sending the photographic paper to the development processing unit. However, a branch line branched from the photographic paper transport line for various purposes such as emergency removal is additionally provided. May be used. In particular, in a photographic printing apparatus that employs line exposure by an optical printer such as a liquid crystal shutter system or a CRT system,
Line exposure is performed sequentially while transporting a long photographic paper as it is, but in order to print an image under the condition that the leading end margin of the photographic paper is as small as possible, once the photographic paper is once downstream from the irradiation point of the exposure unit Since exposure is performed in the process of pulling back after feeding, a retreat branch line for temporarily retreating the photographic paper sent downstream from the irradiation point is necessary to perform long-size exposure.
In such a branch area from the photographic paper transport line to the branch line, a photographic paper sorting mechanism equipped with a transport guide for a normal transport line or a branch transport line, or a crimping device for transporting the photographic paper while compressing it. A transport mechanism is arranged.

[0003]

However, it is not easy to dispose the photographic paper sorting mechanism and the pressure transport mechanism in the branch area where the space is limited, and in particular, each transport guide and the pressure roller for pressure transport. When such a device is made movable, its structure and control become complicated, which causes an increase in the size and cost of the device. SUMMARY OF THE INVENTION An object of the present invention is to provide a photographic printing apparatus equipped with a compact photographic paper sorting mechanism, particularly a line exposure type photographic printing apparatus.

[0004]

In order to achieve the above object, according to the present invention, there is provided a first photographic paper transport line provided with an exposure unit for printing an image on photographic paper, and a distributing mechanism for the first photographic paper transport line. In a photographic printing apparatus provided with a second photographic paper transport line connected via a photographic paper and a photographic paper branch line diverging from the distribution mechanism, the distribution mechanism is in contact with a feed roller and the feed roller. A pressure transfer section comprising a pressure roller which can be displaced to a position; a main transfer guide which can be displaced to an operation position connecting the first photographic paper transfer line and the second photographic paper transfer line;
A photographic paper transport line and a branch transport guide that can be displaced to an operating posture that connects the branch photographic paper transport line,
The pressing roller and the main transport guide are integrally displaced so that they are simultaneously in the operating position, and the branch transport guide is displaced in conjunction with the movement of the main transport guide, thereby displacing the main transport guide. It is characterized in that it is configured to be in the acting posture when departing from the acting posture.

[0005] In this configuration, the pressure roller and the main transport guide are displaced integrally and the branch transport guide is displaced in conjunction with the movement of the main transport guide (pressure roller) so that the respective working postures are changed. Since the setting is made, the control system and the operation system become simpler and the whole structure becomes compact as compared with the configuration in which each is individually displaced.

In one preferred embodiment of the present invention, the pressure roller and the main transport guide are fixed to a control arm that swings around a first swing fulcrum, and the branch transport guide is connected to the control arm. The pressure transfer roller and the main transport guide are in the non-operative position and the branch transport guide is in the active position at the first swing position of the control arm, and the control arm is in the second swing position. At the swing position, the main transport guide is in the operating position, the pressure roller and the branch transport guide are in the non-operating position, and at the third swing position of the control arm, the pressure roller and the main transport guide are in the operating position. It is proposed that the branch conveyance guide be in a non-operative position. In this case, by simply changing the swing angle of the single swing control arm, each of the pressure roller, the main transport guide, and the branch transport guide can be set to the working posture or the non-working posture. Not only the operation structure is simplified, but also the drive system for the operation can be simplified.

Further, in another preferred embodiment of the present invention, at the fourth swing position of the control arm, the main transport guide is in the working posture, and the pressure roller and the branch transport guide are in the non-working posture. In some cases, the pressure roller is more distant from the feed roller than the second swing position of the control arm. When the main conveyance guide is in the working posture and the pressure roller and the branch conveyance guide are in the non-working position,
The photographic paper transport line and the second photographic paper transport line are connected freely, but when the distance between them is small, when the leading edge of the photographic paper enters the second photographic paper transport line from the first photographic paper transport line, a pressure roller The feed roller can also serve as an entry guide. Conversely, when the photographic paper is pulled out from the second photographic paper transport line to the first photographic paper transport line, the interval between them may be wide. The proposal described above creates two states in which the first photographic paper transport line and the second photographic paper transport line are free, and in each case, the distance between the pressure roller and the feed roller is set to an optimal value for pulling out and entering the photographic paper. Is set.

In still another preferred embodiment of the present invention, the branch conveyance guide swings around a second swing fulcrum, and the linkage mechanism engages the support shaft of the pressure roller with the support shaft. As described above, if the branch conveyance guide is constituted by the long hole formed in the branch conveyance guide, the movement of the branch conveyance guide with respect to the movement of the pressure roller and the main conveyance guide can be made desired by the position and shape of the long hole. it can.

The control arm is set at a swing position by a cam mechanism. The cam mechanism is configured to rotate around a third swing fulcrum and a cam follower provided at a free end of the control arm. Are also proposed. In this case, since the respective movements of the pressure roller, the main conveyance guide, and the branch conveyance guide can be controlled only by rotating the rotary cam body, the operation control system can be simple and inexpensive motor control. Other features and advantages according to the present invention will become apparent from the following description of embodiments with reference to the drawings.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A photographic processing apparatus incorporating an example of a photographic printing apparatus according to the present invention will be described. (Overall Configuration of Photo Processing Apparatus) The photo processing apparatus shown in FIGS. 1 and 2 is a digital printing unit 1 as a digital printer for exposing an image based on digital data to roll paper RP, and cutting exposed photographic paper. A cut paper transport unit 105 that cuts and transports the paper SP, and a development processing unit 30 that receives the exposed cut paper SP into a plurality of tanks and develops with a developer.
0, and a finishing processing section 400 for drying the cut paper SP after the development processing and aligning the cut paper SP on a tray as a finished print. In this specification, photographic paper is used as a general term for photographic light-sensitive materials, and long photographic paper is called roll paper, and photographic paper cut for printing is called cut paper.

On the left side of the developing section 300 when viewed from the front of the photosensitive material processing apparatus, mainly a digital exposure section 1 is provided.
The control unit 200 for controlling the operation of, the transmitted light printing unit 150 for exposing an image obtained as transmitted light from a negative film or the like to the roll paper RP is disposed, and on the cut paper transport unit 105 A paper magazine PM1 for the digital printing unit 1 is detachably provided below the digital printing unit 1, and a paper magazine PM2 for the transmitted light printing unit 150 is provided below the digital printing unit 1.

The digital printing unit 1 includes digital image data obtained by reading an image of a film provided to the transmitted light printing unit 150 with an image sensor such as a CCD, or
A fiber optical type CRT engine 2, which is a type of optical printer that performs line exposure of the roll paper RP, based on digital image data directly provided by a customer through a data storage medium such as a floppy disk, MO or personal computer communication, is installed. ing. The principles of this type of CRT printer are well known and are described, for example, in U.S. Pat. No. 4,309,720.

(Schematic Configuration of Entire Digital Print Unit) As shown in FIG. 3, the digital print unit 1 draws out roll paper RP from a paper magazine PM1 and sends it to the digital print unit 1; An exposure operation unit 40 located near the center of the unit 1 and a paper sorting unit 70 are included. The paper loading section 20 near the upper end has, in addition to the first feed roller 22, a first path switching guide 24 for forming a photographic paper loop in a first loop box RB1 formed above the CRT engine 2. .

A paper sorting unit 70 provided downstream of the exposure operation unit 40 has a paper sorting mechanism 70.
Is a second loop box RB2 arranged at the same level as the cutter unit 80, in addition to the second feed roller 72 capable of supplying the roll paper RP to the cutter unit 80 side.
And a second path switching guide 74 for forming a retreat loop as needed. Second loop box RB
Numeral 2 is provided as a retreat line for temporarily storing roll paper RP advanced for exposure.

In the exposure operation section 40, a tube surface 42 formed at the tip of the CRT engine 2 projects into the photographic paper transport line, and a light beam excited by an electron beam emitted from an electron gun in the CRT engine 2 Is the tube surface 42
Then, the emulsion surface of the roll paper RP which is pushed out and conveyed while being pressed against the tube surface 42 is irradiated, and an image is printed. The tube surface 42 functions as an exposure unit for photographic paper.

Further, the exposure operation section 40 further includes an exposure operation roller 44 and a pressure roller 46 which can press and hold the roll paper RP against the exposure operation roller 44. The roll paper RP once conveyed to the cutter unit 80 side or the second loop box RB2 side is synchronized with the movement of the exposure operation roller 44 while the front surface of the tube surface 42 is pulled up at an accurate speed by the exposure operation roller 44. The exposure is performed by the driven CRT engine 2. In addition, immediately before and after the exposure operation unit 40, the CRT
A paper centering mechanism 100 for centering the roll paper RP in the width direction with respect to the pipe surface 42 of the engine 2 is provided.

The digital print section 1 is housed in a light-shielding box 3 for holding the roll paper RP drawn out of the paper magazine PM1 for exposure processing in a dark room state. It has a drawer mechanism for easily pulling out the print unit 1 from the light-shielding box 3 and performing inspection and maintenance in a light room. Further, the cut paper transport unit 105 disposed adjacent to the downstream of the digital print unit 1 is provided with a cut paper S cut as a print.
P is transported in a state of being sandwiched between two transport belts arranged opposite to each other.

(Structure of Paper Loading Unit) As shown in FIG. 4, the paper loading unit 20 mainly includes
It comprises a first feed roller 22 and a first path switching guide 24. The first feed roller 22 is a paper magazine PM1.
The rotation is driven by a motor (not shown) around an axis parallel to the axis of the roll paper RP. The first path switching guide 24 has an axis X parallel to the first feed roller 22.
A swing arm 25 that can swing up and down around one turn is provided with a first guide roller 26 near the upper end thereof.
However, a loop roller 28a and an auxiliary loop roller 28b are both rotatably supported near the lower end.

The swing arm 25 has a linearly extending loading guide surface 25a and, at the same time, a loading posture in which the loading guide surface 25a assumes a substantially vertical posture by an actuator such as a rotary solenoid. While the swinging operation of the swing arm 25 is performed while the swinging arm 25a swings between the loop postures which are flipped up, the swinging arm 25 has an elastic restoring force lower than the operating force of the actuator. , And the other end is fixed to the swing arm 25).

When the swing arm 25 is in the loading position, the loading guide surface 25a forms a vertically extending paper loading path with the fixed guide surface 30, and at the same time, the first guide roller 26 Is the first
The roller is pressed in the direction of the peripheral surface of the feed roller 22, and the tangent between the two rollers is substantially perpendicular (along the loading guide surface 25a).
Therefore, when the first feed roller 22 is rotated forward in this state, the roll paper RP is pulled out of the paper magazine PM1 by being sandwiched between the first feed roller 22 and the first guide roller 26. It is guided along the paper loading path formed by the loading guide surface 25a, and is loaded on the exposure operation unit 40 side.

On the other hand, when the swing arm 25 is in the loop position, the loading guide surface 25a and the first feed roller 22 are flipped up to open the wide opening of the first loop box RB1. In addition, since the first guide roller 26 is also separated from the first feed roller 22,
The roll paper RP is kept pressed against the first feed roller 22 by the remaining pressing rollers 2.
The loop rollers 28a (which have been retracted to the paper magazine PM1 side in the loading posture so as not to interfere with the roll paper RP) enter the paper loading path by being directed to the first loop box RB1 side by 7, 27. As described above, the vehicle enters the first loop box RB1.

Therefore, the roll paper R loaded vertically to the exposure operation unit 40 side by the above-described process.
When a part of P is held by the exposure operation roller 44 and the pressure roller 46 and the first feed roller 22 is rotated forward again in the loop position, the roll paper RP newly supplied from the paper magazine PM1 is rotated. Are guided in a first loop box RB1, and stored in the box as a basic loop in a loop.

After the basic loop is once formed, the swing arm 25 is maintained in the loop position, the first feed roller 22 is stopped, and the exposure operation roller 4 is stopped.
When roll 4 is reversed, roll paper R returned
P is guided into the first loop box RB1 by the auxiliary loop roller 28b of the swing arm 25 to form a loop in the box.

Due to the existence of such a basic loop, the roll paper RP of a length necessary for exposure, which is necessary as a preparation stage of the exposure operation, is preliminarily placed downstream of the exposure operation unit 40 in the transport direction (developing processing unit side). When the paper is fed in, it is drawn out of the loop without being drawn out of the paper magazine PM1. The return of the roll paper RP at the time of exposure is absorbed by this loop.

Note that the loop roller 28a and the auxiliary loop roller 28b are further provided with an axis X with respect to the swing arm 25 itself.
Arm member 2 supported so as to be able to swing back and forth in one direction
9, a coil spring 26a for urging the arm member 29 toward the first loop box RB1 is provided between the swing arm 25 and the arm member 29. Therefore, in order to make the loop roller 28a enter the first loop box RB1, the swing arm 2
Even when the loop 5 is in the loop position, the loop roller 28a is not moved (due to paper jamming or the like).
If a large stress is applied from the first loop box RB1 side, the loop roller 28a together with the arm member 26 can be retracted closer to the paper magazine PM1 than the fixed guide surface 30. However, when the swing arm 25 is in the loading posture, the swing arm 25 is provided with an arm so that the loop roller 28a maintains the posture retracted from the paper loading path regardless of the biasing force of the coil spring 26a. A stopper 25c for stopping the swing of the member 29 at a predetermined angle is formed.

Further, the swing arm 25 includes the coil spring 2
If the roll paper RP is jammed in the loading path while the first path switching guide 24 is in the loading state, the swing arm 2
5 can be swung toward the loop posture side against the urging force of the coil spring 25b. In the paper loading section 20, the first guide roller 26 and the first feed roller 22 are main components of the photographic paper transport mechanism.

(Structure of Exposure Operation Unit) As shown in FIGS. 5, 6, 7, and 8, the exposure operation unit 40 includes a CRT engine 2
In addition to the tube surface 42, an exposure operation roller 44 made of metal (aluminum or the like) driven by a step motor M1, a pressure roller 46 formed by covering the peripheral surface of a core metal with a synthetic rubber layer such as NBR, It includes a paper bypass mechanism 48 for keeping the roll paper RP apart from the tube surface 42 except during operation, and a pressing pad 50a for pressing the roll paper RP against the tube surface 42 during an exposure operation.

The pressure roller 46 is pressed against the exposure operation roller 44 to hold the roll paper RP, and the pressure roller 46 is separated from the exposure operation roller 44 and
P can be displaced between the release positions for releasing P, and the pressing pad 50a is similarly moved from the roll paper RP to the tube surface 42.
It can be switched between the crimping position and the releasing position. The postures of the pressure roller 46 and the pressing pad 50 a are collectively operated by a first posture control cam mechanism 52 provided in the exposure operation unit 40.

The first attitude control cam mechanism 52 has a box-shaped main body 52a that supports the exposure operation roller 44 at both ends, and a pair of rotatably supported two ends of the pressure roller 46 supported on the main body 52a. The first swinging small piece 60, a pair of swinging plates 54a swingable around the axis X2 located near the lower end of the main body 52a, and a crank-like extending position from the rotating shaft of the DC motor M2 so as to be rotatable. Bearings provided 5
5 The first swinging pieces 60 are swingably supported around an axis X3 provided on the main body 52a, and each swinging plate 54a and each first swinging piece 60 individually operate the link mechanism 53. It is interlocked and linked through. The pair of rocking plates 54a are fixed by a common horizontal rod 56 that is rotatable on the axis X2.
It is slidable in an elongated hole 54b formed on one side of the rocking plate 54a.

The elongated hole 54b is provided with the revolving bearing 5
An arc-shaped cam portion 54 having the same curvature as the outermost circle drawn by 5
c, extending upward from the arcuate cam portion 54c,
A first linear cam portion 54 having substantially the same width as its own outer diameter
d, a second linear cam portion 54e extending from the arcuate cam portion 54c in a direction opposite to the first linear cam portion 54d.
The link mechanism 53 includes, in addition to the first swinging small piece 60, a second swinging small piece 62 that can swing around the axis X4 located between the axis X2 and the axis X3, and a first swinging small piece. One end 60 of the small piece 60
a and a link arm 64 connecting one end 62a of the second swinging piece 62.

By the swinging of the pair of first swinging pieces 60, the pressing position and the releasing position of the pressing roller 46 are alternatively created.
The pressure roller 46 is always urged to the pressure position by the left and right coil springs 60c and 60d which are individually connected. Further, the pressing pad 50a is also supported by a swinging member 50b that can swing around the axis X2 separately from the first swinging piece 60 and the swinging plate 54a, and at the same time, the torsion spring is released from the tube surface 42. On the other hand,
Engagement pins 50c extending above the pressing pad 50a from both left and right ends of the swing member 50b are configured to be able to engage with engaged portions 54p provided on the pair of swing plates 54a.

Therefore, when the step motor M2 is rotated forward, the first attitude control cam mechanism 52 sequentially shows the following states according to the revolving motion of the bearing 55. FIG. 9 occurs when bearing 55 is at point A on its orbit.
In the first state shown in (a), the bearing 55 is located near the entrance of the second linear cam portion 54e in the elongated hole 54b, and as a result, the rocking plate 54a assumes a substantially vertical posture. I keep it. In this first state, no acting force acts on the link mechanism 53 and the first swinging small piece 53a from the swinging plate 54a.
It is pressed against the exposure operation roller 44 by 60d,
On the other hand, the pressing pad 50a is separated from the tube surface 42 by the urging force of the torsion spring since the engagement pin 50c is released from the engagement state with the rocking plate 54a.

FIG. 9 (b) occurs when the bearing 55 is slightly forward (counterclockwise) from point A and is at point B on the orbit.
In the second state shown in FIG.
4b, enters the arc-shaped cam portion 54c, and as a result,
The oscillating plate 54a maintains a posture that is greatly inclined toward the tube surface 42 side. In this second state, the rocking plate 54a is still
Since there is no acting force on the link mechanism 53 and the first swinging piece 60 from the above, the pressing roller 46 keeps the above-mentioned pressing position, while the engaging pin 50c of the pressing pad 50a It is pressed against the tube surface 42 by engaging with the engaged portion 54p. The exposure operation performed by pressing the roll paper RP against the tube surface 42 is performed in the second state.

In the third state shown in FIG. 10A which occurs when the bearing 55 further rotates forward from the point B and is at the point C on the orbit, the bearing 55 is in the first straight line within the elongated hole 54b. Penetrates into the cam portion 54d, and as a result, the swing plate 5
4a maintains a posture slightly inclined to the tube surface 42 side. In the third state, the situation is substantially the same as in the first state. That is, the pressing roller 46 is still in the pressing position, but for the pressing pad 50a, the engaging pin 50c is kept engaged with the engaged portion 54p and the tube surface 42 is still in contact.
The pressing pad 50a is restored to a state of being separated from the tube surface 42.

In the fourth state shown in FIG. 10B, which occurs when the bearing 55 is slightly rotated forward from the point C and is at the point D on the orbit, the bearing 55 is formed into an arcuate cam within the elongated hole 54b. Part 54c, and as a result, the swing plate 54a
Maintain a posture slightly inclined to the opposite side to the tube surface 42. In the fourth state, the pressing pad 50a maintains the state of being separated from the tube surface 42 as before, but the pressure roller 46 assumes the position separated from the exposure operation roller 44. That is, in the fourth state, the side surface of the swinging plate 54a acts on the action point 62b formed on the second swinging small piece 62 to tilt the second swinging small piece 62 downward around the axis X2. Since the one end 62a of the second swinging small piece 62 is displaced downward by the tilting of the second swinging small piece 62, the link arm 64 to which the lower end of the second swinging small piece 62 is connected with the lower end of the second swinging small piece 62 also slightly. Displaces downward while tilting. Due to the downward displacement of the link arm 64, the one end 60a of the first swinging small piece 60 is displaced downward around the axis X3.
Takes a posture separated from the exposure operation roller 44 against the urging force of the coil springs 52c and 52d. Note that the sensor PS3 can detect that the pressing roller 46 is in the pressing position with respect to the exposure operation roller 44, and that the releasing of the pressing roller 46 from the pressing position is detected by the sensor P3.
The detection is enabled by S1.

Preparation for Exposure Operation First, the operation of loading the roll paper RP into the exposure operation section 40 is performed in the fourth operation.
It is possible in a state. Further, since the arc-shaped cam portion 54c with which the bearing 55 contacts in the second state and the fourth state has the same curvature as the outermost circle drawn by the revolving bearing 55, as described above, DC Even if the motor M2 and the bearing 55 stop at a position slightly overrun from the predetermined position, this does not affect the attitude of the swing plate 54a.

As shown in FIGS. 11A and 11B, immediately below the pressure roller 46 and the exposure operation roller 44, a roll paper RP as a paper bypass mechanism is placed on the tube surface 4.
A pair of guide members 65 and 66 for guiding the front surface of the second member 2 are provided. One of them is a fixed guide 65 that does not move, while the other is a movable guide 66 that can swing around an axis 66a. The movable guide 66 has its lower end 66b retreated toward the CRT engine 2 body side from the tube surface 42, and
In cooperation with the fixed guide 65, the roll paper RP
Exposure posture for guiding a route that can contact with the lower end portion 66 and the lower end portion 66
b protrudes forward from the tube surface 42 and roll paper R
It is possible to swing between the detour postures in which P is detoured so that it cannot contact the pipe surface 42. That is, in the detour posture, the roll paper RP is moved from the gap between the pressure roller 46 and the exposure operation roller 44 to the paper distribution mechanism 70 downstream of the exposure operation unit 40, and further to the cutter unit 80 side further downstream. , (With no fear of damage due to contact with the tube surface 42).

The movable guide 66 is normally held in the detour position by a torsion spring 66c, and is switched to the exposure position when an exposure operation is required. That is, in the exposure operation, first, the first attitude control cam mechanism 52 is switched from the fourth state to the first state, so that the pressure roller 4
6 presses the roll paper RP against the exposure operation roller 44, and subsequently, when the first attitude control cam mechanism 52 switches to the second state, the swinging member 50b tilts toward the tube surface 42 side, and the pressing pad 50a The RP is pressed against the tube surface 42. When the swing member 50b is tilted,
Interlocking pin 51 provided near the upper end of swing member 50b
Moves the lower end 66b of the movable guide 66 to the CRT engine 2
Since the movable guide 66 is pushed into the main body, the torsion spring 66
The exposure posture is switched to the exposure posture against the urging force of c.

(Structure of Paper Distributing Mechanism) In the paper distributing mechanism 70, the photographic paper transporting line further downstream in the photographic paper transporting direction than the exposure operation unit 40 includes a first photographic paper transporting line to the paper distributing mechanism 70, It can be divided into a second photographic paper transport line from the paper sorting mechanism 70 to the cutter unit 80 and a branch photographic paper transport line from the paper sorting mechanism 70 to the second loop box RB2.
In the above, how the photographic paper transport lines are connected is determined by the second path switching guide 74.

As shown in FIGS. 12A and 12B, the second path switching guide 74 has a control arm 75 that can swing around the fixed axis X5 and a control arm 75 that can swing around the axis X6. And a loop guide 76 as a suitable branch guide. A cutter guide 75a as a main transport guide and a swing shaft 75b are fixed to the control arm 75, and a second guide roller 75c is rotatably attached to the swing shaft 75b. Through the swing of the control arm 75, the guide surface provided on the cutter guide 75a follows the transport line to the cutter unit 80, and the second
The guide roller 75c presses the roll paper RP against the second feed roller 72. The control arm 7
The loop guide 76 which can swing around the axis X6 independent of the shaft 5 has an elongated hole 76a extending linearly, and the swing shaft 75b passes through the elongated hole 76a. With this structure, the swing of the control arm 75, and consequently, the movement of the swing shaft 75b causes the loop guide 76 to swing around the axis X6. The loop guide 76 is also provided with a guide surface for the roll paper RP. The swing surface of the loop guide 76 allows the guide surface to follow the fixed guide 79 connected to the second loop box RB2.

The relative movement of the loop guide 76 with respect to the control arm 75 is limited by the engagement relationship between the swing shaft 75b and the elongated hole 76a.
When b moves in an arc around the axis X5, the loop guide 76 is forcibly rocked around the axis X6 based on this, and as a result, the approach path of the leading end of the roll paper RP is distributed. Become. Note that the paper sorting mechanism 70
In the embodiment, the second guide roller 75c and the second feed roller 72 form a photographic paper press-and-convey section.

As described above, the control positions of the cutter guide 75a, the loop guide 76, and the second guide roller 75c are set by the swing displacement of the control arm 75.
The swing of the control arm 75 is controlled by the second posture control cam mechanism 77.
It is realized by. The second attitude control cam mechanism 77 includes an operating portion 75e as a cam follower provided at a free end of the control arm 75, and a rotating cam body 78 that is rotated in a stepwise manner at a constant angle around the axis X7. It is composed of

The action portion 75e is formed by using a ball bearing so as to have a rotatable outer peripheral portion. The control arm 75 is configured such that the action portion 75e is always cam-operated by a torsion coil spring provided around the axis X5. It is urged so as to be close to the axis X7 of the body 78.

The rotating cam body 78 has substantially 90
A first cam surface 78a, a second cam surface 78b, a third cam surface 78c, and a fourth cam surface 78d are formed in the circumferential region of the shaft core X7 which is shifted in phase by ゜. The first cam surface 78a has a radius of r1, the second cam surface 78b has a radius of r3, and the fourth cam surface 78d has a radius of r2, which is an arc shape of the axis X7, where each radius is r1 >> r2. > R3. The third cam surface 78c is formed as a linear surface connecting the second cam surface 78b and the fourth cam surface 78d.
A curved first transition surface 78e is provided between the cam surface 78a and the second cam surface 78b, and a third cam surface 78c and a fourth cam surface 78c.
d, a straight second transition surface 78f continuing from the third cam surface 78c, and a curved third transition surface 78g between the fourth cam surface 78d and the first cam surface 78a. The action portion 75e as a follower is formed in such a form that it can easily move between the cam surfaces.

Each cam surface has a predetermined distance in the circumferential direction. In other words, as apparent from FIG. 14, the working angle range of the first cam surface 78a is α1, and the second cam surface 78
The operating angle range of b is α2, the operating angle range of the third cam surface 78b is α3, the operating angle range of the fourth cam surface 78d is α4, and as long as the rotary cam body 78 is located in each operating angle range, its cam surface And the swing angle of the control arm 75 created by the action section 75e, and consequently the attitude of the second guide roller 75c, the control arm 75, and the loop guide 76 are constant. For this reason, since the rotation control of the rotary cam body 78 does not require so high precision, a relatively inexpensive DC motor M3 and a known control driver therefor can be used.

When the rotating cam body 78 rotates (approximately 90 ° each) so as to correspond to the circumferential position of each cam surface, the action portion 75e rolls on each cam surface, and the control arm 7 rotates.
The swing position of 5 changes. The position of the rotating cam body 78 is detected by
The detection is performed by the detected object 78h attached to the rotating cam body 78 and four sensors (here, magnetic sensors) arranged at every 90 degrees around the rotating cam body 78. In addition,
The third cam surface 78c makes the second guide roller 75c adhere to the second feed roller 72.
12, the rotation in the counterclockwise direction in FIG. 12 is limited by the contact of the second guide roller 75c with the second feed roller 72. In this state, the action portion 75e is floating from the third cam surface 78c. Therefore, the third cam surface 78c can be defined as a non-operating cam surface.

By rotating the rotary cam 78 in order of 90 ° by the DC motor M3, the second path switching guide 74 is set to the following state; FIG.
In the first state shown in (a), the rotating cam body 78 faces upward, and the action portion 75e of the control arm 75 is
8a. In this first state, the second
At the same time that the guide roller 75c is sufficiently separated from the second feed roller 72, the loop guide 76 is raised upward, and the leading end portion 76b of the guide surface of the loop guide 76
Is located higher than the tip 73 a of the fixed guide 73 connected to the cutter unit 80 and is close to the peripheral surface of the second feed roller 72. The guide surface of the cutter guide 75a is also located at a position distant from the photographic paper transport line to the cutter unit 80. When the roll paper RP is sent from the exposure operation unit 40 in this state, the roll paper R
The tip of P slides down on the guide surface of the loop guide 76, proceeds from the fixed guide 79 to the second loop box RB2, and forms a retreat loop here.

In the second state shown in FIG. 12B, the rotating cam body 78 faces leftward in the drawing, and the action portion 75e of the control arm 75 is supported by the second cam surface 78b. In the second state, the second guide roller 75 c is still separated from the second feed roller 72, but the cutter guide 75
The guide surface a is in a posture along the photographic printing paper transport line to the cutter unit 80, and the loop guide 76 is slightly tilted, and the leading end portion 76 of the guide surface of the loop guide 76 is tilted.
b is retracted below the distal end 73a of the fixed guide 73. In this state, the roll paper RP is moved to the exposure operation unit 4.
When the roll paper RP is fed from the zero side, the leading end of the roll paper RP is guided to the fixed guide 73 by the guide surface of the cutter guide 75a.

As described above, in order to allow the loop guide 76 to temporarily intersect and relatively move with respect to the fixed guide 73, the leading end 76b of the guide surface of the loop guide 76 and the fixed guide 73 The tip 73a has a comb-like shape extending so as to supplement the gap. Such a structure extending so as to compensate for a gap for relative movement with temporary intersection is provided by the second guide roller 75.
c is also employed between the peripheral surface of the fixed guide 73 and the front end 73a of the fixed guide 73.

In the third state shown in FIG. 13A, the rotary cam body 78 faces downward in the drawing, and the action portion 75e of the control arm 75 has been lowered to the vicinity of the third cam surface 78c.
The main area of the third cam surface 78c is larger than the other cam surfaces by the axis X.
7, in this third state, the position of the control arm 75 is maintained by the contact of the second guide roller 75c with the second feed roller 72. However, cutter guide 7
The posture of the loop guide 5a and the loop guide 76 is essentially the same as the second state.

When the roll paper RP is switched from the second state where the roll paper RP is guided by the fixed guide 73 to the third state, the roll paper RP is kept between the second guide roller 75 c and the second feed roller 72. When the second feed roller 72 is driven forward (counterclockwise in the figure), the roll paper RP is sent toward the cutter unit 80, and the second feed roller 72 rotates in the reverse direction (clockwise in the figure). ) By being driven, the cutter unit 80 is pulled back toward the exposure operation unit “40”.

In the fourth state shown in FIG. 13B, the rotating cam body 78 faces rightward in the drawing, and the action portion 75e of the control arm 75 is supported by the fourth cam surface 78d. The fourth state is substantially the same as the second state, except that the second guide roller 75c is farther from the second feed roller 72 than in the second state, and the cutter guide 75a
Is further separated from the photographic paper transport line to the cutter unit 80. The distal end portion 76b of the guide surface of the loop guide 76 is retracted below the distal end 73a of the fixed guide 73. In this state, the roll paper RP once sent to the cutter unit 80 side can be pulled back toward the exposure operation unit 40 by the exposure operation roller 44 of the exposure operation unit 40. In the third state, the guide surface of the cutter guide 75a approaches the photographic paper transport line less than in the second state because the roll paper RP is pulled out from the fixed guide 73 in this state. The fourth cam surface 78d that creates this state
Is formed farther from the axis X7 than the second cam surface 78b.
There is also a secondary effect that makes the transition of 8a smooth.

(Cutter Unit) As shown in FIG. 3, a cutter unit 80 capable of cutting the roll paper RP on its transport path is provided downstream of the paper sorting unit 70. The cutter unit 80 is located at the most downstream of the digital printing section 1. In the photographic paper transport line, downstream of the cutter unit 80, an exit transport unit 9 for transporting the cut paper SP.
0 is provided. The outlet transport unit 90 is fixed to a frame of the photosensitive material processing apparatus.

As shown in FIG. 2, downstream of the exit transport unit 90 in the photographic paper transport direction,
0 and the horizontal transport unit 105 arranged adjacent thereto
a, a cut paper transport unit 10 composed of a vertical transport unit 105c that transports the paper SP from the outlet to the entrance of the development processing unit 300 positioned vertically downward.
5, the cut paper SP cut by the cutter unit 80 can be transported to the development processing unit 300.

(Configuration of Paper Centering Mechanism) As shown in FIG. 3 and FIG.
A pair of movable first rollers provided upstream of the tube surface in the photographic paper transport direction and further upstream of the exposure operation roller.
Paper centering mechanism 1 including width regulating guides 101, 101 and a pair of similarly movable second width regulating guides 102, 102 provided downstream of tube surface 42 in the photographic paper transport direction.
00 is provided.

As shown in FIG. 15, the first width regulating guides 101, 101 and the second width regulating guides 102, 101
One end of 02 is screw-fitted onto guide rods 103 and 104 formed as feed screws, and the other end is a groove capable of guiding the printing paper in the width direction by inserting the side end of the printing paper. 101a and 102a are provided. First width regulating guides 101, 101 and second width regulating guides 102, 10
2 is prevented from rotating by a slide guide (not shown), and is configured to linearly move by rotation of the guide rods 103 and 104. Note that the feed screw portion formed on the guide rods 103 and 104 is
Are formed in opposite directions with respect to the center in the horizontal direction (the center of line exposure), and the grooves facing each other approach or move away from each other by the rotation of each guide rod.
Since the two guide rods 103 and 104 are connected by a timing belt, when one of the guide rods 104 is rotated by a stepping motor or the like, the first and second width regulating guides (101, 101 and 1) are rotated.
02, 102), the same amount of space is changed at the same time, and the center of the left and right width regulating guides of the two always coincides with the center of the tube surface 42. First and second width regulation guides (101, 101 and 102, 10
The interval created by 2), that is, the guide width, will be described in detail later in the centering operation.
The width is set to a pass width having a value wider than the reference width defined by the S standard by an allowable error or a centering width equal to or smaller than the reference width of photographic paper.

Hereinafter, the operation of the line exposure type digital printer having the above-described configuration will be described with reference to the schematic diagram of FIG. 16 and the flowchart of FIG. 17. In the schematic diagram of FIG. The state is represented by symbols, solid lines and dotted lines. For example, the paper loading unit 20
With respect to the first guide roller 26, the first feed roller 2
2 is ST-1, the state in which the first guide roller 26 is separated from the first feed roller 22 is ST-2,
Then, the state in which the loop roller 28 enters the first loop box RB1 area over the photographic paper transport line is indicated by ST-.
1. The state where the loop roller 28 is separated from the first loop box RB1 area is defined as ST-2. Exposure operation unit 40
As for ST, the state in which the pressure roller 46 constituting the transport mechanism in this area is in close contact with the exposure operation roller 44 is referred to as ST-.
1. ST-2 is a state in which the pressure roller 46 is separated from the exposure operation roller 44, and ST-1 is a state in which the pressing pad 50a presses the roll paper RP against the tube surface.
The state where the pressing pad 50a is separated from the roll paper RP is defined as ST-2. Regarding the paper sorting section 70, a state in which the second guide roller 75c is in close contact with the second feed roller 72 is ST-1, a state in which the second guide roller 75c is separated from the second feed roller 72 is ST-2, and a loop guide is provided. ST-1 is the state in which the roll paper RP guides the roll paper RP to the second loop box RB2, and ST is the state in which the loop guide 76 is away from the photographic paper transport line.
-It is 2. Further, as the stop position of the leading end of the roll paper RP, the stop point about 10 mm before the cutter unit 80 is set to 1-P, and the stop point on the cutting line of the cutter unit is set to 2-P. further,
Exposure length of standard size from irradiation point of exposure section: L1
The stop point which is located only downstream in the photographic paper transport direction is 3-
Let P be a predetermined number of exposure lengths when exposing a plurality of images: Lx
Only at the downstream side in the photographic paper transport direction, the stop point at the retraction line is 5-P. 4-P is a non-standard exposure process.
This is the stop point when returning to the upstream side from 0 and entering the evacuation line.

When the line exposure type digital printer is started, the leading end of the roll paper RP drawn from the paper magazine is fed out to reach the point 1-P, and the exposure length of one exposure is sufficiently transferred to the first loop box. A startup process is performed to form a loop of a predetermined length having a satisfactory length (# 2). Next, once the roll paper RP in the exposure area is in a free state,
In steps 1 and 102, a paper centering process for forcibly centering the roll paper RP is performed (# 4). It is determined whether the front end region of the roll paper RP is exposed, that is, whether or not fogging has occurred (# 6). If there is fogging, fogging processing for cutting the fog portion by the cutter unit 80 is performed (# 10). If there is no fog, pre-exposure processing is performed to convey the roll paper RP so that the irradiation point of the exposure unit and the leading end of the roll paper RP have almost the same exposure length (# 8). Next, the exposure process is started, and before that, it is checked whether it is a normal exposure or an exceptional exposure such as a specially large print (requiring a long exposure distance) or multiple prints. (# 12), the standard exposure processing of # 14 for normal exposure, the exceptional length exposure processing of # 16 for large prints of exceptional exposure, and the multiple exposures of # 18 for multiple prints Perform exposure processing. In any case, an image based on the image data is printed on the roll paper RP by performing line exposure at the irradiation point while returning the roll paper RP toward the first paper box.

In order to send the exposure area of the roll paper RP as cut paper to the developing unit 300, a paper cut process is performed by a cutter unit (# 2).
0). In this paper cutting process, the basic loop in the first loop box RB1 is supplemented by the amount used for printing. It is checked whether border cut is necessary for the cut paper SP (# 22). If border cut is necessary, border cut processing is performed (# 24). In any case, the cut paper is sent to the development processing unit 300. Sent (# 26).

As a result, a series of printing operations is completed, and it is checked whether further printing operations are necessary (# 28). When the printing operations are completed, end processing such as returning the roll paper RP to the paper magazine again is performed. (# 32). If the printing operation continues, a photographic paper loop of a basic amount is formed in the first loop box (# 30), and the process returns to # 12.

Next, the main processing routine shown in the flowchart of FIG. 17 will be described in detail with reference to the flowchart. In the startup routine shown in FIG. 18, the processing routine is drawn from the paper magazine PM1. The roll paper RP is conveyed by forward rotation of the first feed roller until the leading end reaches point 1-P (# 1).
21). First feed roller 2 from paper magazine PM1
The transfer of photographic paper up to 2 is performed by a transfer mechanism. Subsequently, the pressure roller 46 is switched to the state ST-1, and the roll paper RP is sandwiched between the exposure roller 44 and the exposure operation roller 44 (# 122).
In step # -2, the loop roller 28a is switched to the state ST-1 to prepare for the formation of a photographic paper loop in the first loop box RB1 (# 123). When the first feed roller 22 is driven to rotate forward while the roll paper RP is pressed and held by the pressure roller 46 and the exposure operation roller 44, the roll paper RP pulled out from the paper magazine PM1 is transferred to the first loop box RB1. Then, a loop is formed in the first loop box RB1 (# 124). This loop formation ends when the sensor detects the loop. The loop formed in this way is called a basic loop, and is maintained as much as possible during the printing operation. Subsequently, the first feed roller 22 is further driven forward (# 125), and in this embodiment, the roll paper RP is further moved by the predetermined length which is a value obtained by subtracting 50 mm from the length of the print to be created next. When sent to one loop box RB1 (# 126), the first
The feed roller is stopped (# 127).

In the paper centering processing routine shown in FIG. 19, the pressure roller 46 is switched to the state ST-2, a gap is formed between the pressure roller 46 and the exposure operation roller 44, and the roll paper RP around the exposure unit is set in the free state. (# 41). At this time, the first width regulating guide 101 and the second width regulating guide 102
The guide width created by each of the guide grooves 10
The guide width is set to a predetermined value (pass width) wider than the reference width defined by the JIS standard of the photographic paper guided by 1a and 102a by an allowable error. It is set to a predetermined value (centering width) which is equal to or less than the reference width of the photographic paper (# 42). As a result, the center axis of the roll paper RP is forcibly moved to the first width regulating guide 1.
01 coincides with the center of the guide width created by the second width regulating guide 102, and as a result, coincides with the perpendicular bisector of the line exposure locus. When the centering is completed, the press roller 46 is switched to the state ST-1, and the roll paper RP is pressed and held by sandwiching the roll paper RP with the exposure operation roller 44 (# 4).
3) After that, the motor 105 is operated again to set the guide width created by the first width regulating guide 101 and the second width regulating guide 102 to a predetermined value (passing width) wider than the reference width of the printing paper (# 44).

In the pre-exposure processing routine shown in FIG. 20, the second guide roller 75c of the paper sorting section 70 is switched to the state ST-1 (# 81), and the second feed roller 72 is switched.
After the roll paper RP is sandwiched in between, the pressure roller 75c of the exposure unit is switched to the state ST-2 (# 8).
2), the second feed roller 72 is driven to rotate forward (# 83), and the roll paper RP is transported toward the cutter unit 80;
(# 84), the second feed roller 72 is stopped (# 85). Next, the pressure roller 46 is set to the state S.
After switching to T-1 (# 86), the second guide roller 75c is switched to the state ST-2 (# 87), and the conveyance of the next roll paper RP is entrusted to the exposure operation roller 44.

In the standard exposure processing routine shown in FIG.
First, the exposure operation roller 44 is driven to rotate in the reverse direction (# 141).
The roll paper RP is fed back to the first loop box RB1, and the length from the leading end of the roll paper RP to the irradiation point of the exposure unit is a standard exposure length: L1 (a length for creating a standard print). , Ie, at the point 3-P (# 142), the exposure operation roller 44
Is stopped (# 143). Next, the pressing pad 50
a is switched to the state ST-1 (# 144), and the emulsion surface of the photographic paper is brought into close contact with the tube surface 42. At the same time as the exposure operation roller 44 is driven to rotate in reverse (# 145), the CRT engine 2 is driven in synchronization with the operation of the exposure operation roller 44, and the R, G, and B are input based on image data input in advance.
The desired image is printed on the roll paper RP by repeating the line exposure performed by sweeping each light beam (# 146). When the exposure is completed, the exposure operation roller 44 is stopped (# 147), the pressing pad 50a is switched to the state ST-2 (# 148), and the close contact of the roll paper RP with the tube surface 42 is released.

In the plural-sheet exposure processing routine shown in FIG. 22, the leading end side of the roll paper RP having a length sufficient to print a plurality of images set on a console (not shown) is moved from the irradiation point of the exposure unit. An evacuation line provided on the downstream side in the transport direction, that is, the second loop box RB
To be stored. For this purpose, the exposure operation roller 44 is driven in reverse rotation (# 171), the leading end of the roll paper RP is returned to the point 4-P on the upstream side of the paper sorting unit 70 (# 172), and the exposure operation roller 44 is stopped. (# 1
73). The loop guide 76 is switched to the state ST-1, and the photographic paper transport line is branched to the retraction line (# 1).
74). The exposure operation roller 44 is driven to rotate forward (# 17).
5) A length enough to print a plurality of images whose length from the leading end of the roll paper RP to the irradiation point of the exposure unit is set: Lx (varies depending on the number of sheets, but this is not shown) (Calculated by the controller), that is, at point 5-P (# 17
6) Stop the exposure operation roller (# 177). Here, since the roll paper RP has been pulled out longer than usual, the loop formed in the first loop box RB1 is replenished (# 178). This loop replenishment is performed simultaneously with the operations of # 175 to # 177.

Next, the pressing pad is switched to the state ST-1 (# 179), and the emulsion surface of the printing paper is brought into close contact with the tube surface 42. The exposure operation roller is driven to rotate in the reverse direction (# 18)
0) At the same time, the CRT engine 2 is driven in synchronization with the operation of the exposure operation roller 44, and the line exposure performed by sweeping the R, G, and B light beams based on the previously input image data is repeated. Then, the desired image is printed on the roll paper RP (# 181). This exposure is repeated for the required image (# 182). When all the exposures are completed, the exposure operation roller is stopped (# 18).
3) Switch the pressing pad to state ST-2 (#
184) The close contact of the roll paper RP with the tube surface 42 is released. Further, the loop guide 76 is switched to the state ST-2 so that the roll paper RP on which the image has been printed is sent to the cutter unit (# 18).
5). In addition, the roll paper RP that has been exposed to a plurality of sheets
In the paper cutting process described above, the image is cut and printed for each image, that is, for each print, and is sent to the development processing unit 300 as cut paper SP for the number of printed images.

Also, in the exceptional length exposure processing routine, the length of the roll paper RP to wait on the downstream side in the transport direction (developing processing unit side) from the irradiation point of the exposure unit becomes long as in the multiple-sheet exposure processing routine. In the paper sorting section, the roll paper RP is not sent to the cutter unit, but is sent to the second loop box to form a loop, so that the roll paper RP of a required length is temporarily stored, and then the exposure is performed. Do. The only difference from the above-described multiple exposure processing routine is that there is no repetition of the exposure of # 182. Stop position at the shunting line: The method of determining the value of 5-P and the driving of the CRT engine 2 are determined according to the exceptional length, that is, the nonstandard print size.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a photographic processing apparatus employing the technology of the present invention.

FIG. 2 is a schematic cross-sectional view of the photographic processing apparatus according to FIG.

FIG. 3 is a schematic cross-sectional view of a digital print section.

FIG. 4 is a schematic diagram illustrating the movement of a paper loading unit.

FIG. 5 is a front view of an exposure operation unit.

FIG. 6 is a left side view of the exposure operation unit.

FIG. 7 is a right side view of the exposure operation unit.

FIG. 8 is a perspective view showing a part of an exposure operation unit.

FIG. 9 is a schematic diagram illustrating the movement of a first attitude control cam mechanism.

FIG. 10 is a schematic diagram illustrating the movement of a first attitude control cam mechanism.

FIG. 11 is a schematic diagram illustrating the operation of the paper bypass mechanism.

FIG. 12 is a schematic diagram illustrating the movement of a paper sorting unit.

FIG. 13 is a schematic diagram illustrating the movement of a paper sorting unit.

FIG. 14 is an enlarged view of a rotary cam body.

FIG. 15 is a perspective view of a paper centering mechanism.

FIG. 16 is a schematic diagram illustrating the movement of each mechanism in a photographic paper transport line.

FIG. 17 is a flowchart illustrating the operation of a digital print unit.

FIG. 18 is a flowchart showing a startup processing routine.

FIG. 19 is a flowchart showing a paper centering processing routine;

FIG. 20 is a flowchart showing a pre-exposure processing routine;

FIG. 21 is a flowchart showing a standard exposure processing routine;

FIG. 22 is a flowchart showing a multiple-sheet exposure processing routine;

[Explanation of symbols]

 RP Roll paper (print paper) RB2 Second loop box 20 Paper loading section 22 First feed roller 26 First guide roller 28a Loop roller 40 Exposure operation section 44 Exposure operation roller 46 Pressure roller 70 Paper sorting mechanism 72 Second feed roller 75 Control arm 75a Main transport guide (cutter guide) 75c Second guide roller 75e Cam follower (working part) 76 Branch transport guide (loop guide) 77 Cam mechanism 78 Rotating cam body

Claims (5)

[Claims] A first photographic paper transport line provided with an exposure unit for printing an image on photographic paper; a second photographic paper transport line connected to the first photographic paper transport line via a sorting mechanism; In a photographic printing apparatus provided with a photographic paper branch line branched from a distribution mechanism, the distribution mechanism includes a feed roller and a pressure transfer section including a pressure roller that can be displaced to an operation position in close contact with the feed roller; A main transport guide that can be displaced into an operating position connecting the first photographic paper transport line and the second photographic paper transport line; and a branch that can be displaced into an operating position that connects the first photographic paper transport line and the branch photographic paper transport line. A transport guide, and the pressing roller and the main transport guide are integrally displaced so as to be in an acting posture at the same time, and the branch transport guide is It is configured such that the working posture when detached from the working position of the main conveyance guide by displacing in conjunction to the movement of the main conveyor guide photographic printing apparatus according to claim. 2. The pressure roller and the main transport guide are provided in a first
It is fixed to a control arm that swings around the swing fulcrum,
The branch transfer guide is linked to the control arm via a link mechanism, and the pressure roller and the main transfer guide are in a non-operation position and the branch transfer guide is in an operation position at a first swing position of the control arm. The main transport guide is in the operating position at the second swinging position of the control arm, and the pressure roller and the branch transport guide are in the non-operating position at the third swing position of the control arm. The photographic printing apparatus according to claim 1, wherein the branch conveyance guide is in a non-operation position while the main conveyance guide is in an operation position. 3. The control arm has a fourth swinging position in which the main transport guide is in the operating position and the pressure roller and the branch transport guide are in the non-operating position.
The photographic printing apparatus according to claim 2, wherein the pressure roller is further apart from the feed roller as compared with the swing position. 4. The branch conveyance guide swings around a second swing fulcrum, and the linkage mechanism is formed on the branch conveyance guide such that the support shaft of the pressure roller is engaged with the support shaft. The photographic printing apparatus according to claim 2, wherein the photographic printing apparatus comprises a long hole. 5. The control arm has a swinging position set by a cam mechanism. The cam mechanism includes a rotating cam body rotating around a third swing fulcrum and a cam follower provided at a free end of the control arm. The photographic printing apparatus according to any one of claims 2 to 4, comprising: