JPH03294838A - Photographic paper carrying device for photograph printing machine - Google Patents

Abstract

PURPOSE:To finish the rewinding of a paper under a state that it is nipped by a nip roller by providing a sensor which detects the leading edge of the paper with the aid of closely making into contact with the nip roller and controlling the rewinding of the paper with the aid of the paper detection signal of the sensor. CONSTITUTION:The sensors D1 - D3 which are arranged on a printer part side by closely bringing them into contact with the nip roller 20 and which detect the leading edge of a photographic paper 10 and a controller which transmits the driving force of a motor to the roller 20 side when the paper 10 is fed and which stops the rewinding of the paper 10 under the state that the neighborhood of the leading edge of the paper 10 is nipped by the nip roller 20 by transmitting the driving force of the motor to a take-up shaft 12 side and stopping the rotation of the motor based on the leading edge detection signals of the sensors D1 - D3 during the rewinding when the paper 10 is rewound are provided. Thus, the paper is efficiently taken up in a magazine.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a photographic paper conveying device for a photographic printing machine, and particularly to a photographic paper conveying device for a photographic printing machine that conveys photographic paper wound and stored in a magazine to a printer section. This invention relates to a paper conveyance device.

[Prior Art] A photoprinting machine uses a magazine in which photographic paper (hereinafter referred to as paper) is wound up into a roll and stored therein, and the paper is conveyed to a printing position. There are two types of magazines: simple types, such as cardboard magazines, in which paper is simply wound up and stored in a roll, and types in which the winding shaft is rotatable so that it can be rewound. . If you want to change the width of the paper, the glossy or silky area, or finish printing,
In the above-mentioned simple type, the paper is cut near the paper entrance/exit of the magazine. In addition, in the case of the rewind type, the paper is cut immediately after the printed frame, and the subsequent webs are rewound into the magazine by reversing the winding shaft. This reversal of the winding shaft is performed manually or automatically by a motor.

[Problem to be solved by the invention]

However, in the case where the paper is rewound by manually rotating the winding shaft, the paper must be rewound, resulting in a problem of reduced efficiency. Furthermore, if the paper is simply rewinded by reversing the winding shaft using a motor, two motors are required, one for feeding the paper and one for rewinding, which raises the problem of increased manufacturing costs. Furthermore, if the winding shaft is simply reversed by the motor, the leading end of the paper may be wound up into the magazine due to inertia during unwinding of the paper roll. In this case, there is a problem in that it is necessary to take out the leading edge of the paper from the magazine, and it takes time and effort to reset the magazine.

The present invention is intended to solve the above-mentioned problems, and it is possible to efficiently wind up paper into a magazine without using two motors, and also to prevent the tip of the paper from being wound up into the magazine. It is an object of the present invention to provide a photographic paper conveying device for a photographic printing machine.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a motor, a transmission mechanism that selectively transmits the driving force of the motor to the nip roller and the take-up shaft, and a transmission mechanism that is disposed close to the nip roller and on the printer section side. , a sensor that detects the leading edge of the photographic paper, transmits the driving force of the motor to the nip roller side when feeding the photographic paper, and transmits the driving force of the motor to the winding shaft side when rewinding the photographic paper. A controller is provided which stops the rotation of the motor in response to a leading edge detection signal from the sensor during rewinding, and stops rewinding the photographic paper in a state where the vicinity of the leading end of the photographic paper is nipped by the nip roller.

[Effect]

At the time of paper feeding, the driving force of the autoload motor is transmitted to the nip roller side via the transmission mechanism, and the paper is sent to the printer section side by the nip roller. The paper sent to the printing position is subjected to printing exposure and then fed frame by frame by a paper feeding section, the exposed frames are ejected from the printing position, and a new unexposed paper is set at the printing position. When the unexposed portion of the paper is rewound into the magazine to replace the paper or to finish the print job, the cutter cuts the printed paper immediately after the exposed frame. Thereafter, the transmission means is switched from the nip roller side to the take-up shaft side, and the driving force of the motor is transmitted to the take-up shaft. This rotates the winding shaft in the unwinding direction, and the paper is wound onto the winding shaft. Then, when the leading edge of the paper comes close to the nip roller, a sensor detects this and stops the motor, stopping the rewinding of the paper with the vicinity of the leading edge of the paper being nipped by the nip roller.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIG. 1 showing the main parts of a printer processor embodying the present invention and FIG. 2 showing the overall general configuration, paper 10 is wound up into a roll on a winding shaft 12 and stored in a magazine 13. There is. A drive gear 1 is attached to the winding shaft 12.
4 is fixed, and a rotating gear 16 is linked to the drive gear 14 via an intermediate gear 15. Each of these gears 14
, 15° 16 are recesses 1 formed on the sides of the magazine 13.
It is rotatably attached within 3A.

This magazine 13 is set in the magazine storage section of the printer processor 17 on the first day. In the magazine storage section 18,
A pair of nip rollers 20 are disposed close to the paper inlet/outlet port 19 of the magazine 13, and a planetary gear 21 is disposed close to the rotary gear 16.

The nip roller pair 20 is composed of a lower roller 2OA and an upper roller 20B biased downward by a coil spring 24 so as to come into elastic contact with the lower roller 2OA. Upper roller 2OB
is attached to the nip release lever 25. An eccentric cam 27 attached to a nip release motor 26 is in contact with the release lever 25, and the eccentric cam 27 pushes the release lever 25 as the motor 26 rotates. As a result, the upper roller 2OB is lifted upward and the nip is released. This nip release is performed when the magazine is set, so that the leading end of the paper protruding from the magazine 13 can be easily held between the upper and lower rollers 20A and 20B. Note that instead of using the motor 26 and the eccentric cam 27 to release the nip, a solenoid may be used. Furthermore, only a nip release lever may be provided and this may be manually operated when the magazine is set.

A drive gear 28 is fixed to the shaft end of the lower roller 20A, and the planetary gear 21 selectively engages with this by rotation of an arm 29. Planetary gear 21 is sun gear 3
The sun gear 30 is rotated by an autoload motor 32 via a timing belt 31.

Further, a rewind solenoid 33 and a coil spring 34 are attached to the arm 29.
When the nip roller pair 2 is turned off, the coil spring 34
The planetary gear 21 is set to a loading position where it meshes with the drive gear 28 of 0. Also, at 08:00 of the solenoid 33, the plunger protrudes and engages the rotating gear 1 of the magazine 13.
6 is set to the rewind position where the planetary gear 21 meshes with the gear 6. The rewind solenoid 33 is of a type in which the plunger protrudes at 08 o'clock, but a type in which the plunger is retracted at 08 o'clock may also be used. In this case, install the rewind solenoid on the opposite side from the protruding type installation.

A first loop forming portion 38 is provided on the paper exit side of the nip roller pair 20. This loop forming portion 38
A movable guide 39 is arranged to guide the leading end of the paper fed by the nip roller pair 20 to the paper conveyance path 40. After this guidance, the guide switching motor 41 rotates the movable guide 39 downward to the retracted position to form a space for the loop. The paper conveyance section 40 is composed of a guide roller 42 and paper guides 45 and 46, and the paper conveyance section 40 is configured to change the conveyance direction of the paper 10 from horizontal to vertical.
The paper 10 is guided to the print position 48 by changing the 0' direction.

As shown in FIG. 2, a variable mask 50 of the printer section 49 is arranged at the print position 48, and the paper 1
The mask opening is configured to be changed depending on the width of the mask. Then, on the paper 10 at the print position 48,
Negative film 53 set in film carrier 52
The image is formed by the printing lens 54 and the mirror 55. As is well known, the image on the negative film 53 is processed by the light quality adjustment section 56. It is illuminated by the baking light from the light source 5B that has passed through the diffusion box 57. Further, the image on the negative film 53 is subjected to three-color separation photometry at each point by a scanner 59, and the exposure amount is calculated from various characteristic values obtained from the photometric values. Then, based on this exposure amount, each filter position and exposure time of the light quality adjustment section 56 are determined, and the light quality adjustment section 56 and the shutter drive section 60 are controlled thereby.

As shown in FIG. 1, a well-known cut/sort marker 61 is arranged on the paper exit side of the variable mass printer 5o, and a cut/sort marker 61 consisting of a small hole is placed between the frames that have been printed and exposed. Records marks and sort marks.

A first paper feed section 62 is arranged on the paper exit side of the cut/sort marker 61. This paper feeding unit 62 is composed of a feeding roller 63, a main feed motor 64 that rotates the feeding roller 63, and a guide belt 65, and it reliably transports the unexposed paper lO fed by the nip roller pair 20 to the print position 5o. At the same time, the exposed paper 10 is conveyed from the printing position 50 to the second loop forming section 67. The guide belt 65 is connected to the feed roller 64 by three guide rollers 68.
The paper feed direction is changed from the vertical direction to the horizontal direction.

A first cutter 75 for cutting the paper 10 between each frame is disposed on the paper outlet side of the paper feeding section 62. This cutter 75 cuts the paper 10 immediately after the printed frame when finishing the printing work or when replacing the paper 10 with another size or area.

As shown in FIG. 2, on the exit side of the first cutter 75,
A loop forming section 77 is arranged to store the printed and exposed paper 10 in a loop shape.

The loop forming section 77 includes the printer section 49 and the processor section 78.
This is to absorb the difference in processing speed between the paper 10 and the paper 10 and smoothly feed the paper 10 to the processor section 78.
0. A movable guide 81 is provided for guiding the robot to the 0 position. After guiding the leading edge of the paper to the second paper feeding section 80, the movable guide 81 rotates downward to a retracted position to form a space for a loop.

The second paper feeding section 80 includes a feeding roller 82 and two guide rollers 83 that are in contact with the feeding roller 82. A second cutter 85 is arranged on the paper exit side of the second feeding section 80. This second cutter 85 is
Used to temporarily interrupt print work. A third loop forming portion 86 is arranged on the paper exit side of this cutter 85. This third loop forming portion 86
is provided with a movable guide 87 to increase the paper cutting time so that the paper 10 can be continuously fed into the processor section 78 even if the paper 10 is stopped during paper cutting. The movable guide 87 is
When the leading edge of the paper passes, it becomes vertical and guides the leading edge of the paper to the third paper feeding section 90. After this guidance, it becomes a horizontal retracted position, forming a space for a loop.

The third paper feeding section 90 consists of a feeding roller 91 and two guide rollers 92 that are in contact with the feeding roller 91. The feed roller 91 is driven by a paper conveyance system on the processor section 78 side, and is set to the same conveyance speed as this conveyance system.

The paper conveyance system described above includes a first casing for detecting paper in order to feed out and rewind the paper. Second.
Third paper sensors Di, D2°D3 are arranged. The first sensor D1 is arranged close to the nip roller pair 20 and on the downstream side thereof. Further, the second sensor D2 is disposed close to the paper conveyance path 40 and on the downstream side thereof.

Further, the third sensor D3 is disposed close to the first paper feeding section 62 and on the downstream side thereof.

Further, a loop sensor D4 for detecting that the loop has reached a predetermined length is arranged in the first loop forming part 38, and a guide open sensor D5 for detecting the position of the movable guide 39. and a guide close sensor D6 are arranged. Similarly, other second and third loop forming portions 77
．． A loop sensor and a guide position detecting sensor are similarly arranged at 86, but these are not particularly related to the paper rewinding of the present invention, so they are not shown.

Further, a nip release sensor D7 is arranged close to the nip release lever 25 to detect the nip release state.

The signals from each of these sensors D1 to D7 are sent to the controller 1.
00 is input. The controller 100 is constituted by a well-known microcomputer, and has a keyboard 10.
1 and a display 102. Then, the controller 100 controls each part of the drivers 103 to 108 . based on commands input from the keyboard 101 . Drive unit 10
9, it not only feeds and rewinds the paper but also controls the printer section 49 and processor section 78.

Next, the operations of paper feeding and paper rewinding will be explained.

First, the magazine 13 is set in the magazine storage section 18 of the printer processor 17. At this time, the upper roller 20B of the nip roller 20 is lifted upward, and the leading edge of the paper is set between these rollers 20A and 20B.

Next, as shown in FIG. 3, when the magazine 13 is set, an autoload command is output and the controller 100
First, perform initial settings. In this initial setting, the nip release motor 26 is turned on to switch the nip roller pair 20 to the nip state, and all the loop forming parts 3B, 7
Set the movable guides 39 and 81.87 of 7.86 to the guide position, turn off the rewind solenoid 33, and move the planetary gear 21 to the rotating gear 28 of the nip roller pair 20.
mesh.

Next, the controller 100 controls the autoload motor 32
is rotated in the normal direction, and the paper 10 is pulled out from the magazine 13 by the pair of nip rollers 20. As a result, the leading edge of the paper passes through the first sensor D1, so the first sensor D1 becomes O
Become N. Note that if the first sensor D1 does not turn on even after one second has passed since the motor 32 starts normal rotation, the controller 100 determines that paper feeding is not possible and displays an error message.

Eventually, when the leading edge of the paper passes the second sensor D2,
The second sensor D2 is turned on. Note that if this sensor D2 is not turned on even after 2 seconds have passed after passing the first sensor D1, the controller 100 determines that the paper is jammed and displays an error message. When the second sensor D2 is turned on, the controller 100 rotates the main feed motor 64 of the first paper feed section 62 in the normal direction to send the leading end of the paper toward the cutter 75. Due to this feeding, when the leading edge of the paper passes the third sensor D3 and turns it on, the controller 100 stops the rotation of the autoload motor 32 and the main feed motor 64.

Note that if the third sensor D3 does not turn on even after 8 seconds have elapsed since the start of normal rotation of the main feed motor 64,
Similarly to the above, the controller 100 determines that there is a paper jam and displays an error message.

Also, by turning on the third sensor D3, the controller 10
0 rotates the guide switching motor 41 to switch the movable guide 3
9 from the guide position to the retracted position. When the movable guide 39 is set to the retracted position, the guide open sensor D5
is turned ON, and thereby the controller 100 rotates the autoload motor 32 in the normal direction. Therefore, a loop is formed in the first loop forming portion 38. When this loop reaches a predetermined length, the loop sensor D4 turns on and this O
The controller 100 stops the autoload motor 32 after, for example, 1000 pulses from the time of N detection. Note that if the loop sensor D4 is not turned on even after one second has elapsed, the controller 100 determines that there is a paper jam and displays an error message.

In this way, printing is started after a loop is formed in the first loop forming section 38, and the image of the negative film 53 is printed and exposed on the paper 10 at the printing position 48. At this time, as is well known, the three-color separation density of each point of the frame to be printed is measured by the scanner 59, and an appropriate exposure amount is calculated based on this. After the printing exposure, the paper 10 is advanced frame by frame, and the exposed frame is moved to print position 4.
8 and a new unexposed paper 1.
0 is set in print position 48. By this frame-by-frame feeding, the loop amount of the first loop forming section 38 decreases and the loop sensor D4 is turned off, and the controller 100 rotates the autoload motor 32 in the forward direction to feed the paper 10 until a predetermined loop amount is reached. . By repeating this,
Paper 10 is pulled out from magazine 13 and sent to print position 48.

On the printed paper 10, a cut mark is recorded between each frame by a cut/sort marker 61, and a sort mark is recorded at each order break. Then, the paper 10 is stored in the second loop forming section 77 until a predetermined loop amount is reached. When a predetermined loop amount is reached, the leading edge of the paper is sent to the processor section 78 by the second and third paper feeding sections 8090. At this time, a loop of a predetermined length is formed in the third loop forming portion 86.

If printing is temporarily interrupted in the middle, the amount of loops in the second loop forming section 77 decreases because the processor section 78 continuously performs development processing. This decrease is detected by the loop sensor, which causes the controller 100 to automatically operate the second cutter 85 to cut the paper 10 at the cut mark position. Therefore, even if printing is temporarily interrupted, the exposed paper is sent to the processor section 78, so the development process in the processor section is not interrupted.

Furthermore, when finishing a print job or replacing paper, a rewind command is input by operating the keyboard 101. Thereby, the controller 100 controls each part according to the flowchart shown in FIG. First, the controller 100 determines whether or not it has just been printed. If it has just been printed, the controller 100 feeds the paper a certain amount via the first feeding section 62 and cuts the paper 10 at the cut mark position. The printed paper 10 after cutting is subsequently sent to the processor section 78 via the second and third paper feed sections 80 and 90, and is subjected to development processing.

When a rewind command is input without printing after autoloading, or after printed paper is cut, the controller 100 first turns on the rewind solenoid 33, and as shown in FIG. The gear 21 is switched from the driving gear 28 on the nip roller pair 20 side to the rotating gear 16 on the magazine side. Next, the autoload motor 32 is reversed. This reversal causes the winding shaft 12 to rotate in the paper winding direction, so that the paper 10 is wound around the winding shaft 12 and the first loop forming portion 3
8 loop amount decreases. Then, when the loop sensor D4 turns OFF, the controller 100 reverses the main feed motor 64 of the first feeding section 62 two seconds later, and
The paper 10 after the feeding section 62 is rewound. Due to this rewinding, when the leading edge of the paper passes the third sensor D3 and turns off this sensor D3, the controller 100
is the main feed motor 64 after 2 seconds from this OFF time.
stop reversing.

Eventually, when the leading edge of the paper passes the second sensor D2 and then the first sensor D1, these sensors D2. Di
turns off sequentially. Then, the first sensor D1 is turned off.
After several pulses, controller 1
00 stops the rotation of the autoload motor 32 and turns off the rewind solenoid 33. Therefore, when the rewind soinoid 33 is turned off, the planetary gear 21 meshes with the drive gear 28 and the motor 32 stops rotating, so the nip roller pair 20 does not rotate. As a result, the leading edge of the paper is
Finish winding the paper with it being held in its mouth.

After that, the controller 100 sets the movable guide 3B to the guide position. When taking out the magazine 13 from the magazine storage section 18, the nip release motor 2
6 to ON to release the nip roller pair 20 from the nip rollers at the tip of the paper.

Note that if the third sensor D3 does not turn off even after 1 second has passed after the main feed motor 64 reverses, or if the second sensor D2 does not turn off even after 20 seconds have passed after the main feed motor 64 has stopped reverse rotation. If the second sensor D2 does not turn off, even if two seconds elapse after the second sensor D2 turns off, the first
If the sensor D1 does not turn off, the controller 100 determines that rewinding is not possible and displays an error message. FIG. 6 shows a timing chart of each part during rewinding as described above.

In the above embodiment, the present invention is implemented in a printer processor that sends paper to a print position where the paper is held in a vertical direction. You can also apply this to items you send.

Further, in addition to printer processors, the present invention can be implemented in a single printer or even in printing-related equipment that uses several types of roll paper.

Further, in the above embodiment, the switching of the planetary gear 21 is performed by the wind solenoid 33, but this may be performed by a motor. In addition to pulse motors, each motor is a DC motor.

An AC motor or the like may also be used. Further, although the motor is controlled by pulse control, it may also be controlled by time.

〔Effect of the invention〕

As explained above, according to the present invention, the driving force of one motor is selectively transmitted to the nip roller and the winding shaft of the magazine by means of the transmission means, so that the paper feed and the paper into the magazine are controlled. Rewinding is possible with one motor. In addition, a sensor is provided close to the nip roller to detect the leading edge of the paper, and the paper rewinding is controlled by the paper detection signal from this sensor, so that the paper rewinding can be completed while the paper is nipped by the nip roller. Can be done. Further, since paper feeding and rewinding can be automated, the operator can perform other tasks during the rewinding operation, improving efficiency, and also preventing malfunctions during the rewinding operation.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the main parts of a photographic paper conveying device of a photographic printing machine according to the present invention. FIG. 2 is a schematic diagram showing the overall configuration of the photoprinting machine. FIG. 3 is a flowchart showing the processing procedure of the controller when feeding paper. FIG. 4 is a flowchart showing the processing procedure of the controller when rewinding paper. FIG. 5 is a front view showing the paper rewinding state. FIG. 6 is a timing chart when rewinding the paper. 10... Paper 12... Winding shaft 13... Magazine 20... Nip roller pair 21... Planetary gear 32... Auto load motor 33... Rewind solenoid 3B, 77.86... Loop forming section 39.81.87...Movable guide 49...Printer section 62.80.90...Paper feeding section 75.85...
- Cutter 78...Processor section Di-D3...Sensor Di...Loop sensor. Figure 1

Claims (1)

[Claims] (1) Photographic paper wound around the winding shaft inside the magazine,
A photographic paper conveyance device of a photoprinting machine that pulls out a magazine from a magazine with a nip roller and conveys it to a printer section includes a motor, a transmission mechanism that selectively transmits the driving force of the motor to the nip roller and a take-up shaft, and a conveyance mechanism that is disposed adjacent to the nip roller. A sensor is placed on the printer unit side to detect the leading edge of the photographic paper, and a sensor that transmits the driving force of the motor to the nip roller side when feeding the photographic paper, and a sensor that takes up the driving force of the motor when rewinding the photographic paper. a controller that transmits the information to the shaft side and stops the rotation of the motor in response to the tip detection signal of the sensor during this rewinding, thereby stopping the rewinding of the photographic paper with the vicinity of the leading edge of the photographic paper being nipped by the nip roller; A photographic paper conveying device for a photographic printing machine, characterized in that: