JPH0980631A - Rewinding method of photosensitive material in photographic processor - Google Patents

Abstract

(57) An object of the present invention is to provide a rewinding method capable of surely stopping the leading end of an unexposed photosensitive material at the front position of a magazine. A method of rewinding a photosensitive material in a photographic processing apparatus for feeding and processing the photosensitive material from a magazine containing a rolled photosensitive material, the method comprising: When the feeding mechanism A and the sensors S4 and S5 which are the first and second detectors for detecting the tip of the photosensitive material P are sequentially provided, and when the photosensitive material P fed from the magazine 1a is rewound into the magazine 1a, Until the tip of the photosensitive material is detected by the sensor S5, it is rewound at a high speed by the feeding mechanism, the tip passes the sensor S5, and then the speed is switched to low, and then the brake is applied when the tip passes the sensor S4. And the leading end is stopped at the position of the feeding mechanism A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of rewinding a light-sensitive material in a photographic processing apparatus (hereinafter, simply referred to as a rewinding method). More specifically, the present invention relates to a rewinding method for rewinding the unexposed portion of the photosensitive material from the print section of the photographic processing apparatus to the magazine.

[0002]

2. Description of the Related Art As a photographic processing apparatus, a paper, which is a photosensitive material, is fed in a roll form from a magazine, the paper is sent out, the image recorded on a developed film is printed, and then the image is printed. Some papers are developed, dried, and then cut into predetermined dimensions for each frame. Then, when selecting the width and material of the paper, the magazine is replaced. At the time of this magazine replacement, the unexposed portion of the paper sent from the magazine is rewound into the magazine until the tip of the paper is slightly projected from the light-shielding opening of the magazine due to the rotation of the core (actually, fairness). 7-12990).

[0003]

There is no problem in rewinding the paper by the core when the paper winding diameter is small.

However, if the paper length is increased in order to reduce the frequency of paper replacement, the paper winding diameter may increase. In such a case, when the paper is rewound, a large inertial force acts on the paper, so that it is difficult to stop the front end of the paper at a position in front of the light shielding port, and the front end may enter the magazine. . If the paper gets inside the magazine, there is a problem that the magazine has to be removed from the photo processing device, and the leading end of the paper needs to be pulled out from the light shielding opening of the magazine and set again in the protruding state.

In view of the above circumstances, it is an object of the present invention to provide a rewinding method capable of reliably stopping the leading end of unexposed photosensitive material at the front position of a magazine.

[0006]

SUMMARY OF THE INVENTION A delivery method according to the present invention is a method for rewinding a photosensitive material in a photographic processing apparatus for delivering and processing the photosensitive material from a magazine containing the rolled photosensitive material. When the photosensitive material sent out from the magazine is rewound into the magazine, a plurality of rewinding speeds of the photosensitive material are set.

Further, the feeding method of the present invention is a method of rewinding a photosensitive material in a photographic processing apparatus for feeding and processing the photosensitive material from a magazine containing the rolled photosensitive material, and the method is to feed the photosensitive material from within the magazine. When the photosensitive material is rewound into the magazine, it is rewound at a high speed, then switched to a low speed, and then stopped at a position near the light shielding opening of the magazine.

Further, the feeding method of the present invention is a method of rewinding a photosensitive material in a photographic processing apparatus for feeding and processing the photosensitive material from a magazine containing the rolled photosensitive material, which is a light-shielding opening of the magazine. From the front to the first and second detectors for detecting the leading end of the photosensitive material are sequentially provided, and when the photosensitive material fed from the magazine is rewound into the magazine, the second detector is provided. When the leading edge of the photosensitive material is rewound at a high speed by the feeding mechanism until the leading edge of the photosensitive material is detected by the feeding mechanism, the leading edge passes through the second detector and then switches to low speed, and then when the leading edge passes through the first detector. In addition, the brake is applied to stop the tip at the position of the feeding mechanism.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The rewinding method of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an explanatory view showing an embodiment of a photographic processing apparatus relating to the rewinding method of the present invention, and FIG. 2 is an explanatory view showing the operation of the rewinding method of the present invention.

The rewinding method of the present invention is applied to a photographic processing apparatus as shown in FIG. 1, for example. Such a photographic processing device sends out paper P from a magazine in which the paper P is stored in a roll shape, and prints the image information recorded on the developed film to the print unit 2 and develops the baked paper P. The developing unit 3 includes a drying unit 4 that dries the developed paper P and a cutting unit 5 that cuts the dried paper P into predetermined dimensions for each frame. Two magazines 1a and 1b are set in the photo processing apparatus. This is because, when the paper P in one magazine 1a is used up, or when the paper is changed to a paper having a different width or type, the paper P in the other magazine 1b is automatically switched.
This is to reduce the work of exchanging magazines and improve work efficiency. However, in the present invention, the number of magazines is not limited to two.

The magazine 1a is housed in a light-shielded casing, and the paper P pulled out from the magazine 1a is supplied from a pair of conveying rollers 6a, 6b and a drive motor 7 for rotating the conveying roller 6a. Is fed by the feeding mechanism A and is supplied to the printing unit 2.

Next, the rewinding method of the present invention will be described.
In the present invention, the paper sent from the magazine is once looped and then supplied to the printing unit. This is because by forming a loop, it is possible to reduce the feeding speed of the drive motor 7 at the time of starting and stopping the feeding of the paper independently of the other conveying motors.

First, as shown in FIG. 1, the leading end of the paper P stored in the magazine 1a is pulled out to feed the paper A.
It is inserted between the pair of transport rollers 6a and 6b. Then, at a low speed (for example, 250 mm / sec), the paper P is passed through the loop mechanism B and the sensor S shields the light.
After feeding to the position m, feeding of the paper P is stopped. At this time, since the paper P is sent at a low speed,
Absorbing the slack in the magazine 1a to prevent abnormal noise and damage to the paper, and to reduce the inertia force of the paper roll (core) 8 in order to stop at a low speed, the paper P in the magazine 1a You can eliminate the slack. Next, the motor 9 of the loop mechanism B is driven to rotationally move the carrying roller 10 and the carrying guide 11 to the position of arrow C. By this rotational movement, the paper P forms a loop L0 by its own weight. Then, the crimping solenoid 12 operates to hold the paper P. After that, the drive motor 7 is driven to send out the paper P, and the loop L2 is further formed until the sensor S2 is shielded from light. The feeding speed of the paper P here can be set to a high speed (for example, 650 mm / sec) since there is no slack of the paper P in the magazine 1a after the paper P is stopped at a low speed. After the loop L2 is formed,
The feeding speed is returned to a low speed, and then the conveyance motor 13 moves the conveyance rollers 14 and 15 to a low speed (for example, 180 mm).
/ Sec) to feed the leading edge of the paper P to the position of the transport roller 16. Then, the fed paper P is
Image information of the film is printed on each frame in the printing unit 2. It should be noted that in the present invention, the feeding mechanism A is more than the conveying speed at the low speed by the conveying motor 13.
Since the delivery speed at a low speed due to is increased, the sensor S3 is always in the light shielding state at the start of the delivery. When the sensor S3 shields the light from the looped paper P, the feeding of the paper P is stopped from a low speed. Then, the paper is sequentially conveyed by the conveying rollers, and the drive motor 7 remains stopped even when the sensor S3 becomes transparent. When the sensor S2 becomes transparent, the feeding of the paper P is switched from the stop to the low speed. There is. And paper P
In order to prevent the slack and swelling of the paper in the printing unit 2 and to accurately position the paper at the exposure position until the leading edge of the paper bites into the carry roller 18 via the carry roller 17, Since punch holes are often formed, it is necessary to improve the feed accuracy. Therefore, the conveyance speed of the paper P by the conveyance motor 13 is slower than the feeding speed (250 mm / sec) of the paper P, for example, 180 mm / sec. Next, after the leading edge of the paper P is caught in the carrying roller 18, the carrying speed of the carrying motor 13 is switched to a high speed, for example, 630 mm / sec in order to improve the paper processing work. In this case, if the paper P is in the loop L1 state and the sensor S1 is transparent, the paper P delivery speed is increased and the sensor S2 is cut off when the sensor S2 is cut off, and then the drive motor 7 is cut off when the sensor S3 is cut off. To stop. Therefore, once the speed is switched to the low speed, the sensor S1
Does not switch at high speed unless becomes transparent. The above operation is repeated to continue the printing work.

Next, when the printing operation is finished or the paper type is changed, the unexposed paper is rewound into the magazine.

First, the exposed paper in the printing unit 2 is fed to the cut position D and separated from the unexposed paper P. Then, the drive motor 7 of the delivery mechanism A rotates the conveying roller 6a at a high speed in the reverse direction to rewind the loop-shaped paper P into the magazine 1a. Then, when the loop L2 passes through the sensor S2, the drive motor 7 is stopped, and the carry motor 13 causes the carry rollers 14 and 15 to rotate in the reverse direction. If the sensor S3 shields the light, the transport roller 1
The driving of Nos. 4 and 15 is stopped, and the conveying roller 6a is rotated at high speed again instead. In this way, the sensor S2
Based on the detection of S3 and S3, the transport rollers 14 and 15 and the transport roller 6a are alternately rotated in the reverse direction, and the paper P is rewound into the magazine 1a. When the sensor S becomes transparent, the pressure bonding solenoid 12 is turned off, and the transport rollers 14 and 1
5 is stopped, the conveyance roller 6a is reversely rotated at a high speed, and the sensor S5, which is the second detector for detecting the standby position for paper conveyance, becomes transparent as shown in FIGS. 1 and 2A. Then, the drive motor 7 is switched to a low speed. Next, Figure 2
As shown in (b), when the front end of the paper P passes through the sensor S4 which is the first detector, the reverse rotation drive of the drive motor 7 is stopped and the paper P is braked by the conveyance rollers 6a and 6b. I'll do it. At this time, as shown in FIG. 2C, the leading end of the paper P passes between the conveying rollers 6a and 6b by the inertial force of the paper P in the magazine 1a and is rewound. The tip of the roller does not enter the light-shielding port 17 beyond the conveying rollers 6a and 6b, and stops at the position of the conveying rollers 6a and 6b. As a condition for stopping the leading end of the paper P between the sensor S4 and the transport rollers 6a and 6b, for example, when the distance between the transport rollers 6a and 6b and the sensor S4 is L, L> υt-1 / 2αt ² (υ: low rewind speed,
α: deceleration by braking, t: time).

The rewinding method of the present invention is not limited to rewinding paper, but can be similarly applied to rewinding a film into a magazine.

[0018]

As described above, according to the rewinding method of the present invention, when the paper is rewound into the magazine due to the end of the printing operation or the change of the paper, a plurality of speeds are set, for example, high speed rewinding. After returning, it switches to low speed, then brakes the paper to stop the tip of the paper at the position in front of the light shielding port. Therefore, speed up to the middle of the rewind that does not contribute to production,
Work time can be reduced. Further, since the high speed is switched to the low speed and the stop brake is applied, the inertial force of the paper can be reduced. As a result, the accuracy of the paper stop position can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a photographic processing apparatus relating to a rewinding method of the present invention.

FIG. 2 is an explanatory diagram showing the operation of the rewinding method of the present invention.

[Explanation of symbols]

 1a, 1b Magazine 2 Printing section 3 Developing section 4 Drying section 5 Cutting section 6a, 6b Conveying roller 7 Drive motor A Feeding mechanism B Loop mechanism L1, L2 Loop P Paper (photosensitive material) S, S1, S2, S3, S4, S5 sensor

Claims (3)

[Claims] 1. A method of rewinding a photosensitive material in a photographic processing apparatus for feeding and processing the photosensitive material from a magazine containing the rolled photosensitive material, the photosensitive material being fed from the magazine. A method of rewinding a photosensitive material in a photographic processing apparatus, wherein a plurality of rewinding speeds of the photosensitive material are set when rewinding the inside. 2. A method of rewinding a photosensitive material in a photographic processing apparatus for feeding and processing the photosensitive material from a magazine containing the rolled photosensitive material, wherein the photosensitive material fed from within the magazine is used. A method for rewinding a light-sensitive material in a photographic processing apparatus, which comprises rewinding at high speed, then switching to low speed, and then stopping at a position near a light-shielding opening of a magazine. 3. A method of rewinding a photosensitive material in a photographic processing apparatus for feeding and processing the photosensitive material from a magazine containing the rolled photosensitive material, the method comprising feeding the photosensitive material forward from a light shielding opening of the magazine. A mechanism and first and second detectors for detecting the tip of the photosensitive material are sequentially provided, and when the photosensitive material sent from the magazine is rewound into the magazine, the tip of the photosensitive material is detected by the second detector. Until it is detected, the feeding mechanism rewinds at high speed,
After the tip has passed the second detector, switch to low speed and then when the tip passes the first detector,
A method of rewinding a photosensitive material in a photographic processing apparatus, characterized by applying a brake and stopping the leading end at a position of a feeding mechanism.