JPH11237695A - Photograph printing device and cleaning tool used for the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily clean the tube surface of a CRT in a photograph printing device by forming a main body which supports an exposure part and an aperture part on the main body so that a cleaning tool for cleaning the tube surface of the CRT may be inserted. SOLUTION: The aperture part for cleaning 3h is formed along the tube surface of a CRT engine 2 on this side of the box main body 52a of a 1st posture control cam mechanism. Therefore, by inserting a cleaning bar 160 prepared specially from the aperture part 3h and moving it back and forth several times, paper powder produced from roll paper and adhering to the vicinity of the tube surface is removed without disassembling the assembly of the 1st posture control cam mechanism. The bar 160 is made a long thin plate to which velvet, velveteen or gigged cloth (b) functioning as a cleaning body 160a is stuck to a base plate made of synthetic resin. Since a storage means for the cleaning body 160a is provided on the inner surface of a light shielding door 3d, cleaning is performed just by detaching the bar 160 of the door 3d and inserting it from the aperture part 3h.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for cleaning a tube surface of a CRT for performing line exposure processing on photographic paper in a photographic printing apparatus.

[0002]

2. Description of the Related Art In order to form a digital image on photographic paper, a technique of performing line exposure using a CRT is well known. In the case of the line exposure processing, the photographic paper is conveyed while the emulsion surface of the photographic paper is almost in contact with the tube surface of the CRT, and the line is sequentially exposed while the photographic paper is being conveyed. Here, if dirt or dust adheres to the tube surface, the dirt or dust is only exposed as a white dot in the case of surface exposure using a CRT, but is white in the case of line exposure. It is exposed as a line, and the quality as a print deteriorates. Such dust originally adheres particularly to the end face of the photographic paper, and cut powder adheres when the photographic paper is cut into a roll. Therefore, when performing line exposure, it is necessary to constantly remove dust and dirt attached to the tube surface. Conventionally C
To clean the RT screen, open the CRT cover, pull out the CRT unit and hold down the screen.
(Provided to press photographic paper against the tube surface.)
To expose the tube surface so that it can be easily cleaned, and then clean the tube surface with a cloth or the like.

[0003]

However, in the above-mentioned conventional method, there is a problem that the work of exposing the tube surface for cleaning is complicated. After performing the operation of pulling out the CRT unit and lowering the device for holding down the tube surface, it must be returned to the original state again, and the burden on the operator has become enormous. Therefore, there is room for improvement so that cleaning can be performed more easily. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a technique for easily cleaning a tube surface of a CRT in a photographic printing apparatus.

[0004]

In order to achieve the above object, a photographic printing apparatus according to the present invention comprises: an exposure section having a CRT for performing line exposure processing on photographic paper; a main body for supporting the exposure section; An opening is formed in the main body for inserting a cleaning tool for cleaning the tube surface of the CRT. According to this, an opening is formed in the cover body that supports the exposure unit, and the tube surface can be cleaned by inserting a cleaning tool from the opening. By forming the opening, cleaning can be performed without bothersome exposure of the tube surface.

[0005] As a preferred embodiment of the present invention, a dark box capable of holding the photographic paper exposure transfer path provided in the exposure section in a dark room state, and holding the dark box in the exposure transfer path in a dark room state. And a side plate that can be opened and closed for switching between a closed state and an open state where the dark room state is released, and the cleaning tool is detachably attached to the side plate. According to this, first, the side plate is opened, the cleaning tool is removed, and the tube surface can be cleaned by inserting the cleaning tool through the opening. Since the side plate is opened when cleaning is performed, it is possible to prevent the cleaning tool from being inadvertently lost by being detachably attached to the side plate.

In a preferred form of the cleaning device, the cleaning device comprises a substrate made of synthetic resin and a cleaning body attached to the surface of the substrate. By providing the substrate, the strength of the entire cleaning tool is guaranteed, and the tube surface can be cleaned by a cleaning body (such as a cloth or a brush) attached to the surface of the substrate. Further, the substrate is subjected to a line exposure process.
If the cleaning tool is formed in a bar shape corresponding to the shape of the tube surface of the RT, the size of the cleaning tool as a whole can be reduced to a minimum necessary size, and handling becomes simple.

[0007] Other features and advantages of the present invention will become apparent from the following description of embodiments with reference to the drawings.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. (Overall Configuration of Photosensitive Material Processing Apparatus) The photosensitive material processing apparatus shown in FIGS. 1 and 2 is a digital printing section 1 for exposing an image based on digital data to a roll paper RP (photographic paper), and an exposed paper. Transport section 105 for transporting the sheet after cutting the sheet into a sheet of paper SP, a developing section 300 for receiving the exposed sheet of paper SP in a plurality of tanks and developing with a developer, and a sheet after development. It has a finishing unit 400 for drying the paper SP and aligning it on a tray. A control unit 20 for mainly controlling the operation of the digital exposure unit 1 is provided on the left side of the developing unit 300 when viewed from the front of the photosensitive material processing apparatus.
0, transmitted light printing unit 1 for exposing an image obtained as transmitted light from a negative film or the like to roll paper RP
50, a paper magazine PM1 for the digital print unit 1 is provided above the sheet transport unit 105, and a paper magazine PM2 for the transmitted light print unit 150 is provided below the digital print unit 1. Is detachably provided. The digital printing unit 1 stores the image of the film provided to the transmitted light printing unit 150 in the CC.
Digital image data obtained by reading with an image sensor such as D,
Alternatively, a CRT engine 2 for exposing the roll paper RP on the basis of digital image data directly provided by a customer through a data storage medium such as a floppy disk, MO, or personal computer communication is mounted.

(Schematic Configuration of Entire Digital Printing Unit) As shown in FIG. 3, a digital printing unit 1 is a paper loading unit capable of extracting a roll paper RP from a paper magazine PM1 and sending the roll paper RP to the digital printing unit 1. 20 (an example of a supply mechanism), an exposure operation unit 40 located near the center of the digital printing unit 1, and a paper conveyance direction switching unit 70. The paper loading section 20 near the upper end includes a first feeding roller 22 and a first loading roller 22 formed above the CRT engine 2.
There is a first path switching guide 24 for forming a paper loop (basic loop) in the loop box RB1. The paper transport direction switching unit 70 provided downstream of the exposure operation unit 40 is disposed 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. A second path switching guide 74 for forming a paper loop (optional loop) as needed in the second loop box RB2. A tube surface 42 provided at the tip of the CRT engine 2 belongs to the exposure operation unit 40. Since the tube surface 42 is illuminated by an electron beam emitted from an electron gun in the CRT engine 2, the roll paper RP is The roll paper RP can be exposed by pressing it against the tube surface 42. The exposure operation unit 40 further includes an exposure operation roller 44 and a pressure roller 46 that 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 step speed by the exposure operation roller 44. Exposure processing is performed by the CRT engine 2 driven by the motor. Further, immediately before and immediately after the exposure operation unit 40, a paper centering mechanism 100 for centering the roll paper RP in the width direction with respect to the tube surface 42 of the CRT engine 2 is provided.

The digital printing 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, a sheet transport unit 105 disposed adjacent to the downstream of the digital print unit 1
Transports the sheet SP cut in a sheet shape while sandwiching the paper SP between two transport belts arranged to face each other.

(Configuration of Paper Loading Unit) As shown in FIG. 4, the paper loading unit 20 mainly includes
First feed roller 22 and first path switching guide 24
Consists of The first feed roller 22 is rotationally driven by a motor (not shown) around an axis parallel to the axis of the roll paper RP in the paper magazine PM1. First
The path switching guide 24 includes a swing arm 25 that can swing up and down around an axis X1 parallel to the first feed roller 22.
The swing arm 25 supports a first roller 26 near its upper end and a loop roller 28a and an auxiliary loop roller 28b near its lower end so as to be freely rotatable.
The swing arm 25 has a linearly extending loading guide surface 25a and, at the same time, an actuator such as a rotary solenoid or the like.
The loading posture in which 5a is in a substantially vertical posture (FIG. 4-
a) and the loading guide surface 25a is swung between a loop posture in which the loading guide surface 25a is flipped up (see FIG. 4-b), while the swing arm 25 is lower than the operating force of the actuator. Coil spring 25b with elastic restoring force
(One end is fixed to the main body of the photosensitive material processing apparatus, 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 rollers 26 The rollers are pressed in the direction of the peripheral surface of the roller 22, and the tangent between these two rollers is substantially perpendicular (along the loading guide surface 25a).
Is facing. Therefore, when the first feed roller 22 is rotated forward in this state, the roll paper RP
By being sandwiched between the feed roller 22 and the pressing roller 27, the sheet is pulled out of the paper magazine PM1 and guided along the paper loading path formed by the loading guide surface 25a to be loaded on the exposure operation unit 40 side (loading). Is done.

On the other hand, when the swing arm 25 is in the loop posture, as shown in FIG. 4B, the loading guide surface 25a and the first roller 26 are flipped up and the first The wide opening of the loop box RB1 is opened, and the first roller 26 is also
2, the roll paper RP is directed to the first loop box RB1 side by the remaining pressing rollers 27, 27 which are always kept pressed against the first feed roller 22, and further in the loading posture. Loop roller 28a retracted to paper magazine PM1 side so as not to interfere with roll paper RP
Interrupts the paper loading path and enters the first loop box RB1. Therefore, after a part of the roll paper RP loaded vertically to the exposure operation unit 40 side by the above-described process is gripped by the exposure operation roller 44 and the pressure roller 46, the first feed roller 22 is moved in the loop posture. When the roll paper RP is rotated forward again, the roll paper RP newly supplied from the paper magazine PM1 is guided into the first loop box RB1 by the loop roller 28a, the first feed roller 22, and the pressing roller 27, and is looped inside the box. Stored in the form. Here, the first loop box R
The operation of storing the roll paper RP in a loop in B1 is referred to as "forming a basic loop". Further, once the basic loop is formed in this way, the swing arm 2
5 is maintained in the loop position, and the first feed roller 22 is
Is stopped, and even when the exposure operation roller 44 is rotated in the reverse direction, the roll paper RP is moved to the first position by the loop roller 28a and the auxiliary loop roller 28b of the swing arm 25.
The loop in the loop box RB1 is increased by being guided in the loop box RB1 (for details, see the exposure operation described later). One of the purposes of forming the basic loop in this way is to continue the “preparation of the roll paper RP for the length necessary for the exposure,
This is for accurately performing the “operation of feeding in advance before” in a state of being released from the rewind resistance received from the paper magazine PM1. Also, the first loop box R
Another purpose of preparing B1 and forming a basic loop here is to provide a space for receiving the roll paper RP returned to the upstream side from the exposure operation unit 40 while performing the exposure operation, so that the exposure operation unit 40 The purpose is to make the paper pulling operation proceed smoothly without giving unnecessary resistance, and to protect the paper that has been exposed at this time from being damaged. Note that the loop roller 28a and the auxiliary loop roller 28b are rotatably supported by an arm member 29 that is supported to be able to swing back and forth around the axis X1 with respect to the swing arm 25 itself. A coil spring 29 for urging the arm member 29 toward the first loop box RB1 is provided between the moving arm 25 and the arm member 29.
a is attached. Therefore, the loop roller 2
Even when the swing arm 25 is in the above-described loop position, the loop roller 28a is moved from the first loop box RB1 side (from the jammed paper or the like) even when the swing arm 25 is in the loop posture in order to make the 8a enter the first loop box RB1. When a large stress is applied, the loop roller 28a together with the arm member 29 can be retracted to the paper magazine PM1 side from 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 29a. A projection 25c for stopping the swing of the member 29 at a predetermined angle is formed. The shaft of the first roller 26 provided on the arm member 29 may be used as a substitute for the protrusion. Further, the swing arm 25 is
If the roll paper is jammed in the loading path in the state where the first path switching guide 24 is in the loading state, the swing arm 25 is moved by the coil spring 25b. It can be swung toward the loop posture side against the urging force of the coil spring 25b.

(Structure of Exposure Operation Unit) As shown in FIGS. 5 and 6, the exposure operation unit 40 is made of NBR made of NBR driven by a tube surface 42 of the CRT engine 2 and a step motor M1 (not shown). In addition to the exposure operation roller 44 and the pressure roller 46 made of metal (such as aluminum), a paper bypass mechanism 48 (shown in FIG. 8) for keeping the roll paper RP away from the tube surface 42 except during the exposure operation. At the time of the exposure operation, the roll paper RP is
And a pressing pad 50a for pressing the pressing pad 50a. The pressure roller 46 can be displaced between a pressure position in which the roll paper RP is pressed by being pressed against the exposure operation roller 44 and a release position in which the roll paper RP is separated from the exposure operation roller 44 to be released. Similarly, the roll paper RP can be switched between a crimping posture for pressing the roll paper RP against the tube surface 42 and a releasing posture. The postures of the pressure roller 46 and the pressing pad 50a are collectively operated by a first posture control cam mechanism 52 provided in the exposure operation unit 40 as described below.

<< First Attitude Control Cam Mechanism >> As shown in FIGS. 5 and 7, the first attitude control cam mechanism 52 includes:
Box-shaped body 5 supporting exposure operation roller 44 at both ends
2a, a pair of left and right first swinging pieces 60 supported on the main body 52a while rotatably supporting both ends of the pressure roller 46;
60, a pair of rocking plates 54a, 54a 'that can rock around the axis X2 located near the lower end of the main body 52a, and D
It has a bearing 55 rotatably provided at a position extending in a crank shape from the rotation shaft of the C motor M2. The first swinging pieces 60 are swingably supported around an axis X3 provided on the main body 52a, and each swinging plate 54a, 54a 'and each first swinging piece 60 are individually linked. They are linked and connected via a mechanism 53. Further, a pair of rocking plates 54a, 5
4a 'are fixed by a common horizontal rod 56 that is rotatable on the axis X2 so as to swing together.
The bearing 55 is slidable in a long hole 54b formed in one swing plate 54a. In addition, the long hole 54b
Are an arcuate cam portion 54c having the same curvature as the outermost circumference circle drawn by the revolving bearing 55, a first linear cam extending upward from the arcuate cam portion 54c and having substantially the same width as the outer diameter of the bearing 55 itself. Part 54d, the first from the arc-shaped cam part 54c.
It has a second linear cam portion 54e extending in the opposite direction to the linear cam portion 54d. Further, the link mechanism 53 is configured to
In addition to the swinging piece 60, a second swinging piece 62 that can swing around the axis X4 located between the axis X2 and the axis X3,
One end 60a of the swinging piece 60 and one end 6 of the second swinging piece 62
2a. Reference numeral 62 denotes an operation point at which the side surface of the swing plate 54a acts.

By the swing of the first swinging piece 60, the pressing position and the releasing position of the pressing roller 46 are alternatively created, but each of the first swinging pieces 60 is individually connected. The pressure roller 46 is always biased to the pressure position by the left and right coil springs 60c and 60d. Further, as shown in FIG. 8, the pressing pad 50a also
The tube surface 42 is supported by a swing member 50b that can swing around the axis X2 separately from the swing small piece 60 and the swing plate 54a.
A pair of rocking plates 54a, 54a 'is urged by a torsion spring 68 to a release position separated from the rocking member 50b. It is configured to be able to engage with one surface of the engaged portions 54p, 54p formed by bending a part.

{Regarding the Paper Detour Mechanism} As shown in FIG. 8, the pressure roller 46 and the exposure operation roller 44
A pair of guide members 65 and 66 for guiding the roll paper RP to the front surface of the tube surface 42 are provided immediately below the tube surface 42.
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 cooperates with the fixed guide 65 to guide the roll paper RP to a path where the roll paper RP can come into contact with the tube surface 42. The posture (FIG. 8A) and the detour posture in which the lower end portion 66 b projects forward from the tube surface 42 in order to detour the roll paper RP so that the roll paper RP cannot contact the tube surface 42 (FIG. 8B). ). That is, in the detour posture, the roll paper RP is
From the gap between the pressure roller 46 and the exposure operation roller 44,
To the paper transport direction switching unit 70 downstream of the exposure operation unit 40, and to the cutter unit 80 further downstream
The side can be supplied at high speed (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 as needed. That is, in the exposure operation, first, the first attitude control cam mechanism 5
2, the pressure roller 46 presses the roll paper RP against the exposure operation roller 44,
Subsequently, the swing member 50b is tilted toward the tube surface 42, and the pressing pad 50a presses the roll paper RP against the tube surface 42. When the rocking member 50b is tilted, it is provided near the upper end of the rocking member 50b. Since the interlocking pin 51 pushes the lower end portion 66b of the movable guide 66 toward the main body of the CRT engine 2, the movable guide 66 is switched to the exposure position against the urging force of the torsion spring 66c.

{About the urging force adjusting mechanism} During the exposure operation, the pressure roller 46 is, as described above, a total of two (ie, left and right) coil springs 60c and 60d connected to each of the pair of swinging pieces 60. Roll paper RP is pressed against the peripheral surface of the exposure operation roller 44 based on the urging force of the left and right coil springs 60c and 60d.
When there is a difference in the urging force (that is, the elastic restoring force) between the members, an urging force adjustment mechanism is provided for correcting the difference and making the difference equal.

{Construction of CRT Engine} As shown in FIG. 2, the CRT engine 2 has an engine body 2a protruding horizontally from the tube surface 42 to the left of the box-shaped body 52a of the first attitude control cam mechanism 52. And the tube surface 42
Is F with fiber optic sheet
It is OW (fiber optic window). The FOW has a configuration in which a large number of optical fibers extending at right angles to the tube surface 42 are bundled, so that light emitted from the phosphor applied to the back surface of the tube surface 42 is exposed to the photosensitive material pressed against the tube surface 42. Directly on the material (with no distance between)
Can be transmitted. Here, the tube surface 42 has a shape extending horizontally in the front-rear direction of the photosensitive material processing apparatus, and the length in the horizontal direction can sufficiently cover the width of the roll paper RP. Based on the image data sent from the control unit 200, an electron beam corresponding to each of the RGB colors is transmitted from an electron gun (not shown) provided in the engine body 2a.
The phosphor is emitted substantially horizontally toward each of the phosphors corresponding to RGB formed on the tube surface 42 to cause the phosphors to emit light. Tube face 4
2 is provided with a correction filter corresponding to each of RGB to correct the color characteristics of light emitted from each phosphor. Further, the roll paper RP is in close contact with the tube surface 42 during the exposure operation so as to receive the light emitted from the phosphor without leaving a distance and to be exposed. In the exposure operation, the operation of horizontally sweeping the phosphor on the back surface of the tube surface 42 with the electron beam emitted from the electron gun is performed continuously. At this time, the roll paper RP is adjusted according to the beam sweep period. The rotation of the exposure operation roller 44 at the correct speed causes the tube surface 42 to rotate.
I'm being raised in front. By this continuous linear exposure operation, a horizontal line having a vertical width of 1 dot is drawn (exposed) on the paper at a speed of 1 line / 500 microseconds.

(Structure of Paper Transport Direction Switching Unit) The paper transport direction switching unit 70 includes a cutter unit 80 and a second loop box RB2 in which the leading end of the roll paper RP fed further downstream than the exposure operation unit 40 is moved.
Of the second route switching guide 74
In addition to being able to sort the paper by the second feed roller 72, the paper is cut by the cutter unit 8.
It has a function to assist the operation of feeding the paper to the zero side, a function to adjust the cut length of the paper, and the like.

(Position of Cutter Unit) As shown in FIG. 9, a cutter unit 80 capable of cutting the roll paper RP on its transport path is provided downstream of the paper transport direction switching unit 70. The cutter unit 80 is located at the most downstream of the digital printing section 1. An outlet transport unit 90 that can grip the roll paper RP is provided downstream of the cutter unit 80 on the transport path of the roll paper RP. As shown in FIG. 3, the exit transport unit 90 does not belong to the digital print unit 1, but is fixed to a frame of the photosensitive material processing apparatus. A pair of rollers 90a and 90b provided in the outlet transport unit 90 cooperate with a second roller 75c and a second feed roller 72, which can grip the roll paper RP in the paper transport direction switching unit 70, and form a paper tension. Make up the mechanism. That is, the position at which the roll paper RP is to be cut is determined by the stop position of the second feed roller 72, and the cutter unit 80 of the roll paper RP sandwiched between the second roller 75c and the second feed roller 72 is used.
In a state where the pulling force is applied by the rollers 90a and 90b of the downstream exit conveyance unit 90, in other words, the slackness of the paper is reduced so that the true length of the paper is constant irrespective of the paper habit of the roll paper RP. Cut it as it is taken.

(Conveying Unit) As shown in FIGS. 2, 3 and 9, downstream of the digital printing section 1, a sheet conveying section 105 including the above-described exit conveying unit 90 is provided.
Are arranged, and the paper SP cut into a sheet by the cutter unit 80 can be transported to the development processing unit 300.

(Drawing Mechanism of Digital Printing Unit) As shown in FIGS.
The digital printing unit 1 starting from 0 and reaching the cutter unit 80 is housed in the light-shielding box 3 in order to keep the roll paper RP pulled out from the paper magazine PM1 as a processing target in a dark room state. However, CR
The engine cover 2a and the first loop box RB1 surrounding the electron gun and the like of the T engine 2 are always exposed to the bright room while protruding from the light shielding box 3. As shown in FIGS. 10, 11 and 12, there is provided a drawer mechanism for pulling out substantially the entire digital print unit 1 from the light-shielding box 3 toward the front side of FIG. The draw-out mechanism comprises a ball slide rail mechanism 1 installed at a total of four locations on the inner surface of the light-shielding box 3.
The digital printing section 1 includes the entire CRT engine 2 and the first loop box RB1 and is supported via the ball / slide rail mechanism. Therefore, if necessary, after opening the light-shielding door 3d which closes the front opening provided in the front of the light-shielding box 3 and closing 3a, the light-shielding box 3 is usually opened.
Approximately the entire digital print unit 1 stored in the
1 can be pulled out from the light-shielding box 3 toward the near side of the paper of FIG. 1 with a small amount of labor, and inspection and maintenance of various places and replacement of the CRT engine 2 can be performed. Ball slide rail mechanism 13
0 is a fixed rail 130 fixed to the inner surface of the light-shielding box 3.
a, a movable rail 130c fixed to the digital print unit 1 above the first loop box RB1, and an intermediate rail 13 between the fixed rail 130a and the movable rail 130c, which can move relative to both of these rails.
0b, fixed rail 130a and intermediate rail 130b
And the intermediate rail 130b and the movable rail 130
A plurality of rollable steel balls are interposed between the rails c. The remaining three ball / slide rail mechanisms 131, 132, 133 have the same configuration. In order to allow a configuration in which the engine cover 2a and the first loop box RB1 are always exposed to the light room, the light-shielding box 3 is formed with a side opening 3b that exposes the engine cover 2a and the first loop box RB1. However, the side opening 3b communicates with the front opening 3a in order to allow the above-mentioned pull-out operation if necessary. Further, in order to allow the engine cover 2a and the first loop box RB1 to be pulled out from the side opening 3b, and to prevent light from leaking from the side opening 3b during the exposure operation, the first loop box RB1 is connected to the first loop box RB1. A light-shielding flange 135 protrudes from the vicinity of each base end of the engine cover 2a in the up-down and front-rear directions. On the other hand, the light-shielding flange 1 is provided on the inner surface of the light-shielding box 3 and the inner surface of the light-shielding door 3d.
A channel portion 136 for sandwiching the block 35 from inside and outside of the light-shielding box 3
a, 136b are formed. When the light-shielding door 3d is opened, the cleaning opening 3h provided on the front side of the box-shaped main body 52a of the first attitude control cam mechanism 52 can be seen. The cleaning opening 3 h is provided along the tube surface 42 of the CRT engine 2. Therefore, if the separately prepared cleaning bar 160 is inserted through the cleaning opening 3h and is moved back and forth several times, it is generated from the roll paper RP without disassembling the assembly of the first attitude control cam mechanism 52. Thus, paper dust attached to the vicinity of the tube surface 42 can be removed. The cleaning bar 160 is suitably in the form of a long thin plate in which velvet, bettin or a brushed cloth 160b functioning as a cleaning body is adhered to a synthetic resin substrate 160a. Storage means for the cleaning bar 160 is provided on the inner surface of the light-shielding door 3d, and specifically, the pin 3j formed inside the light-shielding door 3d is hooked with the engaging hole 160c of the cleaning bar 160 for storage. Therefore, if the light-shielding door 3d is opened and the cleaning bar 160 hung on the pin 3j is removed,
With a simple operation of simply inserting the cleaning bar 160 from the opening 3h, the tube surface 42 can be immediately cleaned. FIG. 13 shows the relationship between the tube surface 42 of the CRT engine 2 and the cleaning bar 160. On the tube surface 42, a spacer tape 42a is attached to an edge portion in the longitudinal direction to protect the tube surface 42. The cleaning bar 160 is formed in a similar bar shape corresponding to the longitudinal shape of the tube surface 42. When performing cleaning, the pressing pad 50a is kept away from the tube surface 42 as shown in FIG. If the cloth 160b is attached to both sides of the substrate 160a, not only the tube surface 42 but also the pressing pad 50a can be cleaned.

[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 plan 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 schematic diagram illustrating the operation of the paper bypass mechanism.

FIG. 9 is a schematic view showing the arrangement of cutter units.

FIG. 10 is a perspective view showing a drawer mechanism of the digital print unit (before drawer).

FIG. 11 is a perspective view showing a drawer mechanism of the digital print unit (after the drawer).

FIG. 12 is a front view illustrating a drawer mechanism of the digital print unit.

FIG. 13 is a view for explaining a relationship between a CRT tube surface and a cleaning bar.

[Explanation of symbols]

 RP Roll paper (photographic paper) SP Sheet paper 1 Digital print unit 2 CRT engine 3d Light shielding door 3h Cleaning opening 20 Paper loading unit 22 First feed roller 24 First path switching guide 26 First roller 28a Loop roller 40 Exposure operation Unit 44 exposure operation roller 46 pressure roller 50a pressing pad 52 first attitude control cam mechanism 70 paper transport direction switching unit 72 second feed roller 74 second path switching guide 75c second roller 76 loop guide 77 second attitude control cam mechanism 160 Cleaning bar 160a Synthetic resin substrate 160b Cloth 160c Engagement hole

Claims (4)

[Claims] 1. An exposure section having a CRT for performing line exposure processing on photographic paper, a main body supporting the exposure section, and the CRT.
An opening is formed in the main body for inserting a cleaning tool for cleaning a tube surface of the photographic printing apparatus. 2. A dark box provided in the exposure section and capable of holding a transfer path for exposure of the photographic paper in a dark room state; a closed state in which the transfer path for exposure is held in a dark room state; 2. The photographic printing apparatus according to claim 1, further comprising a side plate that can be opened and closed for switching to an open state where the state has been released, and wherein the cleaning tool is detachably attached to the side plate. 3. A cleaning tool used in the photographic printing apparatus according to claim 1, wherein the cleaning tool comprises a synthetic resin substrate and a cleaning member attached to a surface of the substrate. 4. The cleaning tool according to claim 3, wherein said substrate is formed in a bar shape corresponding to a shape of a tube surface of a CRT to be subjected to line exposure processing.