JPH0511356A - Carrying mechanism in printer part for photosensitive material - Google Patents

Abstract

PURPOSE:To obtain a carrying mechanism in a printer part for a photosensitive material capable of printing from the front end part of the long the photosensitive material in a photographic printer applying a roll type processing. CONSTITUTION:The main drive roller which winds out a photographic sheet 12 out of a supply reel 14 and also carries the photographic sheet 12 to the downstream or upstream side of the printer part 10, is arranged. The photographic sheet 12 is carried to an exposure stage 37 at a low speed by the main driving roller 20. A sucking chamber 44 is arranged in the exposure stage 37. The front end part of the photographic sheet 12 is carried along the sucking chamber 44 part at a low speed by the main driving roller 20, therefore jamming does not occur. When the front end part of the photographic sheet 12 reaches the prescribed position of the exposure stage 37, the photographic sheet 12 sucked by the sucking chamber 44 is pulled back to the upstream side, so that the slack is removed and the smoothness is maintained. Thus, printing from the front end part of the photographic sheet 12 is achieved, and the loss of the photographic sheet 12 is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyance mechanism for a photosensitive material in a printer section.

[0002]

2. Description of the Related Art In a photographic printing apparatus, a printing paper on which an image on a negative film is printed in a printer section is a developing tank,
The fixing tank and the rinsing tank are sequentially developed and then dried in the drying section.

This photographic printing apparatus has a type (hereinafter referred to as "sheet type processing") in which a photosensitive material is cut into individual frames for printing, and a long photosensitive material is printed.
There is a type in which each frame is cut after the baking process (hereinafter referred to as "roll type process").

This roll type processing is superior to the sheet type processing in that the printing speed is higher, but the drawback is that the leading end portion of the photosensitive material is wasted each time the rolled photosensitive material is loaded. Had.

That is, in a normal photographic printing apparatus, in order to prevent printing with out-of-focus blurring, the photosensitive material conveyed from the paper supply reel to the main drive roller which is arranged on the downstream side of the exposure section and conveys the photosensitive material. It was necessary to hold the material once, remove the slack of the light-sensitive material, and hold the light-sensitive material on a flat surface in the exposed portion. Therefore, it is impossible to perform the printing process while the front end portion of the photosensitive material is located between the exposure section and the main drive roller.

[0006] Further, generally, in order to hold the photosensitive material flat in the exposure part, an adsorption chamber for adsorbing the back surface of the photosensitive material is provided, but the adsorption chamber of the conventional photoprinting apparatus alone is of a roll type. The photosensitive material could not be processed properly.

[0007]

SUMMARY OF THE INVENTION In consideration of the facts described above, in the present invention, in a photographic printing apparatus to which a roll type is applied, conveyance of a photosensitive material in a printer section capable of printing a leading end portion of a long photosensitive material. The purpose is to provide a mechanism.

[0008]

According to the present invention, there is provided a mechanism for transporting a photosensitive material in a printer section, in which a long photosensitive material wound around a supply reel is transported to the downstream side of the printer section or pulled back to the upstream side. A main drive roller that rotates to, a suction chamber that is disposed on the exposure stage of the printer unit and that holds the back surface of the photosensitive material to hold the photosensitive material on a flat surface, and a main drive roller that is disposed downstream of the suction chamber. When the photosensitive material does not reach the sub-driving roller, the conveying speed of the main-driving roller is slowed down and driven by a predetermined amount, and then the photosensitive material is moved to the upstream side. After the photosensitive material reaches the sub-driving roller by rotating it in the pull-back direction, the photosensitive material is sent to the downstream side with the conveyance speed of the main driving roller set to a predetermined speed. It is characterized by having a control means for rotating the direction.

[0009]

In the transporting mechanism of the photosensitive material in the printer section having the above construction, the photosensitive material is unwound from the supply reel by the transporting roller and is transported to the exposure stage of the printer section by the main driving roller. An adsorption chamber is arranged on the exposure section stage, and when the photosensitive material does not reach the sub driving roller, the main driving roller conveys the photosensitive material at a slow speed. As a result, the photosensitive material is conveyed without breaking the so-called waist and is not jammed.

When the tip portion of the photosensitive material is sent to a position slightly downstream of the exposure position of the exposure stage, all the adsorption holes of the adsorption chamber are closed with the photosensitive material, and the photosensitive material is adsorbed by the adsorption chamber. After that, the main drive roller rotates in the direction opposite to the direction in which the photosensitive material is conveyed, removes the slack of the photosensitive material and holds it on a flat surface, and also pulls back the photosensitive material slightly and stops it accurately at the exposure position.

As a result, it is possible to print from the tip portion of the photosensitive material, and the loss of the photosensitive material is reduced.

After the leading end portion of the photosensitive material is nipped by the sub-driving roller, the conveying speed of the main-driving roller is set to a predetermined speed and the photosensitive material is sent to the downstream side. The photosensitive material is sandwiched between the two and tension is applied to hold the flat surface for exposure.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a supply reel 14 loaded with a photographic printing paper 12 as a roll-shaped photosensitive material is arranged in a printer section 10 having a carrying mechanism according to this embodiment. .. The supply reel 14 is housed in a magazine 16 so that it can be easily mounted.

A transport roller 18 is arranged on the downstream side of the supply reel 14, and a photographic printing paper 12 drawn from the supply reel 14 is arranged on the downstream side of a main drive roller 20.
It is designed to be transported to. The printing paper detection sensor 1 is provided between the transport roller 18 and the main drive roller 20.
9 is provided. By this, the main drive roller 2
A predetermined loop is formed by stopping 0 and driving the transport roller 18 until the photographic paper detection sensor 19 detects the photographic paper 12.

The drive shaft of the main drive roller 20 has a gear 2
1 is fixed. A belt 27 is wound around the gear 21 and the gear 25 fixed to the shaft of the motor 23, and the driving force of the motor 23 is transmitted to the drive shaft. The main drive roller 20 as the pacemaker is set to have a larger carrying force than the sub drive roller 22 arranged on the downstream side, which will be described later. In this embodiment, the transport force is such that the torque of the sub drive roller 22 is 10% to 50% of the torque of the main drive roller 20.

Further, the motor 23 is connected to the control device 50 so as to rotate the main drive roller 20 in the conveying direction of the printing paper 12 or in the opposite direction.

Immediately below the main drive roller 20 on the downstream side,
A transmission sensor 24 is arranged to detect passage of the front end of the photographic printing paper 12. When the leading edge of the photographic paper 12 is detected, the shutter 26 is opened and the photographic paper 12 is conveyed to the exposure section 28.

An exposure lamp 30, a lens 34, a mirror 36 and a printing mask 38 are arranged in the exposure section 28 so that an image of the negative film 40 is printed on the photographic printing paper 12.

An adsorption chamber 44 is disposed on the right side of the exposure stage 37, which is constituted by a baking mask 38 disposed in the exposure unit 28, in the figure. This adsorption chamber 44
2 is a rectangular box in which a plurality of suction holes 47 are formed on a sliding surface 45 with the back surface of the photographic printing paper 12, and the fan 49 is rotated at a position facing the sliding surface 45. A suction pipe 51 for introducing the generated suction force is provided. A drive device (not shown) for rotating the fan 49 is connected to the control device 50. The control device 50 controls the output of the drive device and adjusts the rotation speed of the fan 49. The sliding surface 45 of the suction chamber 44, the outer peripheral tangential surface of the main drive roller 20 and the outer peripheral tangential surface of the auxiliary drive roller, which will be described later, are on the same plane, and the photographic printing paper 12 is held on a flat surface between them. It has become so.

A sub-driving roller 22 is arranged on the downstream side of the exposure section 28 and is driven by a motor 29. The motor 29 is connected to the control device 50 to stop the sub-driving roller 22 or the photographic paper 12
It is designed to rotate in the transport direction. As a result, the photographic printing paper 1 is made up of the auxiliary drive roller 22 and the main drive roller.
The two photographic papers 12 are sandwiched and held on a flat surface, and the photographic paper 12 is conveyed to the carry-out roller 42 arranged on the downstream side. Further, the photographic paper 1 is provided on the downstream side of the sub-driving roller 22.
A transmissive sensor 31 for detecting the front end portion and the rear end portion of No. 2 is arranged.

The photographic printing paper 12 conveyed from the sub-driving roller 22 is conveyed to a processor section (not shown) forming a predetermined loop by the unloading roller 42 arranged on the downstream side of the sub-driving roller 22. The paper 12 is sequentially developed.

Next, the operation of the transfer mechanism according to the present invention will be described with reference to FIG.
It will be described according to the flowchart shown in FIG.

In step 100, the magazine 16 is set. Next, at step 102, the transport roller 18 and the main drive roller 20 are rotated (normally rotated) in the transport direction of the printing paper 12. As a result, the leading end of the roll-shaped printing paper 12 wound on the supply reel 14 is nipped by the carrying roller 18 and carried to the downstream side. The leading end of the photographic paper 12 is conveyed to the main drive roller 20 arranged at the bent portion of the conveyance path of the photographic paper 12, and is nipped and conveyed to the exposure section 28 by the main drive roller 20. In this way, by disposing the main drive roller 20 at the bent portion of the conveyance path from the supply roll 14 to the sub drive roller 22, the traveling load of the photographic paper 12 is reduced and the photographic paper 12 is conveyed in a stable state. It becomes possible.

Next, in step 104, the transmission sensor 24
Determines whether the front end of the printing paper 12 has been detected. When the leading edge of the photographic paper 12 is detected, the main drive roller 20 and the transport roller 18 are stopped and the shutter 26 is opened in step 106. When the shutter 26 opens,
In step 108, the main drive roller 20 is rotated at a constant low speed in the normal direction, and the transport roller 18 is rotated in the transport direction (normal rotation).
Then, the printing paper 12 is conveyed to the exposure stage 37. As a result, the photographic printing paper 12 can slide on the sliding surface 45 of the suction chamber 44.
While being moved, it is conveyed to the exposure stage 37 surrounded by the printing mask 38. At this time, the main drive roller 20
Since the sheet is transported at a low speed, the photosensitive material is transported without breaking the so-called waist and is not jammed. In addition,
The carry amount of the printing paper 12 is a carry amount corresponding to the distance from the transmission sensor 24 stored in advance to a predetermined position of the exposure stage 37. The predetermined position is such that the front end of the photographic printing paper 12 is located on the downstream side by about several millimeters from the lower end of the printing mask 38. At this time, all the suction holes 47 of the suction chamber 44 are blocked with the photosensitive material, and the photographic paper 12 is sucked by the suction chamber 44. Printing paper 12 in step 110
Has been conveyed by a predetermined amount, and if it has been conveyed by a predetermined amount, in step 112, the main drive roller 20 is rotated (reversely) in the direction opposite to the direction in which the printing paper 12 is conveyed, and the image adsorbed in the adsorption chamber 44 is printed. The paper 12 is pulled back to the upstream side (about several millimeters), the slack is removed, and the printing paper 12 is held flat. As a result, printing can be performed from the front end portion of the printing paper 12, and the loss of the printing paper 12 is reduced. Next, in step 114, exposure is performed.

Next, when the printing of the leading end portion of the printing paper 12 is completed, in step 116, the main drive roller 20 is rotated (normally rotated) in the transport direction to move the printing paper 12 to the auxiliary drive roller 22.
Send towards. Transmission sensor 3 in step 118
1 detects the leading edge of the photographic printing paper 12 and determines whether or not it has detected. When the transmission sensor 31 does not detect the leading edge of the printing paper 12,
In step 120, it is determined whether or not the printing paper 12 has been fed by a fixed amount, and if it has not been fed by a fixed amount, a fixed amount is fed in step 116. If a fixed amount has been fed, the processing from step 112 onward is executed.

When the transmission sensor 31 detects the leading edge of the photographic printing paper 12 in step 118, the main driving roller 20 is set to a predetermined conveying speed in step 122, and the sub driving roller 22 rotates in the normal direction at high speed. In this way, the photographic printing paper 12 is held between the main driving roller 20 and the sub-driving roller 22 by applying a constant tension, and the photographic printing paper 12 corresponding to the next frame is held flat. Next, in step 124, it is determined whether or not the photographic printing paper 12 has been fed by a fixed amount, and if it has not been fed by a fixed amount, a fixed amount is fed in step 122. If a fixed amount has been fed, exposure is performed in step 126. Next, after exposure in step 126, it is determined in step 128 whether or not the transmission sensor 31 has detected the rear end of the printing paper 12, and if the rear end is detected, the flow chart ends.

The photographic printing paper 12 which has been printed is cut by the cutter unit 53 at the final frame, and the unloading roller 42 is used.
Are carried to a processor unit (not shown), where they are sequentially developed.

[0028]

As described above, the transport mechanism of the photosensitive material in the printer section according to the present invention enables the front end portion of the photosensitive material to be printed due to the interaction between the main drive roller and the suction chamber. Can be used to the maximum.

Further, the high-speed processing which is characteristic of the roll type can be maintained.

[Brief description of drawings]

FIG. 1 is a schematic view showing a photographic printing apparatus to which a conveyance mechanism of a photosensitive material printer unit according to the present invention is applied.

FIG. 2 is a perspective view showing an adsorption chamber of a transport mechanism in the printer section of the photosensitive material according to the present invention.

FIG. 3 is a flowchart showing the operation of a transport mechanism in the printer section of the photosensitive material according to the present invention.

[Explanation of symbols]

 20 main drive roller 44 adsorption chamber 50 control means (control device)

[Procedure amendment]

[Submission date] August 28, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

This photographic printing apparatus includes a type (hereinafter referred to as "sheet type processing") in which a photosensitive material is cut into individual frames and subjected to development processing , and a long photosensitive material is processed in printing.
There is a type in which each frame is cut after the development processing (hereinafter referred to as "roll type processing").

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

When the tip portion of the photosensitive material is sent to a position slightly downstream of the exposure position of the exposure stage, most of the adsorption holes of the adsorption chamber are closed with the photosensitive material, and the photosensitive material is adsorbed by the adsorption chamber. After that, the main drive roller rotates in the direction opposite to the direction in which the photosensitive material is conveyed, removes the slack of the photosensitive material and holds it on a flat surface, and also pulls back the photosensitive material slightly and stops it accurately at the exposure position.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction content]

Next, in step 104, the transmission sensor 24
Determines whether the front end of the printing paper 12 has been detected. When the leading edge of the photographic paper 12 is detected, the main drive roller 20 and the transport roller 18 are stopped and the shutter 26 is opened in step 106. When the shutter 26 opens,
In step 108, the main drive roller 20 is rotated at a constant low speed in the normal direction, and the transport roller 18 is rotated in the transport direction (normal rotation).
Then, the printing paper 12 is conveyed to the exposure stage 37. As a result, the photographic printing paper 12 can slide on the sliding surface 45 of the suction chamber 44.
While being moved, it is conveyed to the exposure stage 37 surrounded by the printing mask 38. At this time, the main drive roller 20
Since the sheet is transported at a low speed, the photosensitive material is transported without breaking the so-called waist and is not jammed. In addition,
The carry amount of the printing paper 12 is a carry amount corresponding to the distance from the transmission sensor 24 stored in advance to a predetermined position of the exposure stage 37. The predetermined position is such that the front end of the photographic printing paper 12 is located on the downstream side by about several millimeters from the lower end of the printing mask 38. At this time, most of the suction holes 47 of the suction chamber 44 are blocked by the photosensitive material, and the photographic paper 12 is sucked by the suction chamber 44. Printing paper 12 in step 110
Is conveyed by a predetermined amount, and if it is conveyed by a predetermined amount, in step 112, the main drive roller 20 is rotated (reversely) in the direction opposite to the direction in which the printing paper 12 is conveyed, and the image adsorbed in the adsorption chamber 44 is printed. The paper 12 is pulled back to the upstream side (about several millimeters), the slack is removed, and the printing paper 12 is held flat. As a result, printing can be performed from the front end portion of the printing paper 12, and the loss of the printing paper 12 is reduced. Next, in step 114, exposure is performed.

Claims (1)

Claim: What is claimed is: 1. A main drive roller that rotates in a direction in which a long photosensitive material wound around a supply reel is conveyed to a downstream side of a printer section or is returned to an upstream side, and a main drive roller of the printer section. An adsorption chamber arranged on the exposure stage for adsorbing the back surface of the photosensitive material to hold the photosensitive material on a flat surface, and a sub-driving roller arranged downstream of the adsorption chamber for nipping and conveying the photosensitive material conveyed from the main driving roller. When the photosensitive material does not reach the sub-driving roller, the conveying speed of the main driving roller is slowed down and driven by a predetermined amount, and then the photosensitive material is rotated in the direction of returning to the upstream side so that the photosensitive material is sub-driving roller. Control means for rotating the photosensitive material in the direction of sending the photosensitive material to the downstream side with the conveying speed of the main drive roller being set to a predetermined speed after reaching. Transport mechanism in the printer portion of the photosensitive material.