JP2877223B2 - Method of feeding photosensitive material in photographic processing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art As a photographic processing apparatus, a photographic paper (paper), which is a photosensitive material, is sent out from a magazine in which the paper is stored in a roll form, an image recorded on a developed film is printed, and then the printed image is printed. Some papers are developed, then dried, and then cut into predetermined dimensions for each frame. In feeding the paper, a friction (load) is applied to the core of the magazine so that the roll of the paper does not rotate too much, and the roll of the paper is rotated while synchronizing with the feeding mechanism of the paper.

[0003]

However, when the paper is fed, the inertia force acting on the paper changes depending on the diameter of the paper. Therefore, it is difficult to set the friction of the magazine. If the friction is too heavy, the core is not rotated. There is a problem that an excessive load acts on the motor to be applied, thereby reducing the durability of the motor. Conversely, if the friction of the core is too light, the paper may sag in the magazine. If the paper in the slack state is sent out at a high speed with the paper slack, there is a problem that an unusual noise of panning occurs when the paper is fully stretched.

[0004] In view of the circumstances described above, an object of the present invention is to provide a feeding method capable of feeding a photosensitive material smoothly from a magazine.

[0005]

According to the present invention, there is provided a magazine for accommodating a roll of photosensitive material.
And, paying out mechanism be left to send the magazine or al sense of light material
And a loop for forming a loop in the fed photosensitive material
Mechanism and prints the photosensitive material via the loop mechanism
Developing the print section and developing the baked photosensitive material
A method feeding of the photosensitive material in photographic processing apparatus comprising a part, (1) by said feeding mechanism, said photosensitive material at a low speed
After detecting the photosensitive material via the loop mechanism,
After sending out to the loop forming amount by its own weight, photosensitive material
And (2) looping the photosensitive material by its own weight by the loop mechanism.
And (3) holding the photosensitive material at a position downstream of the loop mechanism.
After that, the above-mentioned feeding mechanism can speed up the photosensitive material at high speed.
Sending out and further forming a loop; (4) the feeding machine after a predetermined loop is formed
The photosensitive material is fed at a low speed by the
Transport roller located downstream of the
Sends photosensitive material to the printing section at a lower transport speed than
And a step of inserting the same sequentially .

(5) In the step (4), the photosensitive material
By detecting that the amount of material loop formed has increased,
Speed of feeding of the photosensitive material by the feeding mechanism.
And (6) detecting that the loop molding amount has decreased.
By this, the feeding of the photosensitive material by the feeding mechanism is performed.
Preferably , the method further comprises the step of switching the operation from stop to low speed .

(7) The tip of the photosensitive material is
Until it gets stuck in the transport rollers located downstream of the
Meanwhile, the feeding speed of the photosensitive material is controlled by the feeding mechanism.
That the step of feeding slower than the speed of the photosensitive material, (8) caught on the conveying roller tip of the photosensitive material
Afterwards, the process of switching the photosensitive material transport speed to high speed
If, it becomes less loop forming amount of (9) the photosensitive material, prior
High speed feeding of photosensitive material by the feeding mechanism
When the amount of loop forming of the photosensitive material is increased,
The feeding speed to a low speed, and then the loop forming amount of the photosensitive material.
When the number is further increased, the step of stopping the delivery speed
It is preferable to further include

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A delivery method according to 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 according to the feeding method of the present invention.

The delivery method of the present invention is applied to, for example, a photographic processing apparatus as shown in FIG. Such a photographic processing apparatus sends out the paper P from a magazine in which the paper P is stored in a roll form, prints the image information recorded on the developed film onto the paper P, and develops the printed paper P. The developing unit 3 includes a drying unit 4 for drying the developed paper P, and a cutting unit 5 for cutting the dried paper P into a predetermined size for each frame. In this photographic processing apparatus, two magazines 1a and 1b are set. This is because when one of the magazines 1a runs out of paper P or when the paper width or type is changed to a different paper, the paper P is automatically switched to the other magazine 1b,
This is for reducing the work of replacing the magazine and improving the 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 of the magazine 1a is supplied from a pair of transport rollers 6a, 6b and a drive motor 7 for rotating the transport rollers 6a. And is supplied to the printing unit 2.

Next, the delivery 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 sending speed of the drive motor 7 at the time of starting and stopping the feeding of the paper independently of the other transport motors.

First, as shown in FIG. 1, the leading end of the paper P stored in the magazine 1a is pulled out, and a feeding mechanism A
Between the pair of transport rollers 6a and 6b. Then, at a low speed (for example, 250 mm / sec), the sensor S is shielded from light by passing the paper P through the loop mechanism B.
After the paper P is fed to the position m, the feeding of the paper P is stopped. At this time, to send out the paper P at a low speed,
Absorbing the slack portion in the magazine 1a, preventing abnormal noise and damage of the paper, and also lowering the inertia of the paper roll (core) 8 to stop the paper P from a low speed. You can eliminate sagging. Next, the motor 9 of the loop mechanism B is driven to rotate the transport roller 10 and the transport guide 11 to the position indicated by the arrow C. Due to this rotational movement, the paper P forms a loop L0 by its own weight. Next, the press-fit solenoid 12 operates to hold the paper P. Thereafter, the drive motor 7 is driven to send out the paper P, and a loop L2 is further formed until the sensor S2 is shielded from light. Since the paper P is sent out after the paper P is stopped at a low speed, the paper P can be sent at a high speed (for example, 650 mm / sec) because there is no slack of the paper P in the magazine 1a. After the loop L2 is formed,
The feed speed is returned to the low feed speed, and the feed rollers 14 and 15 are moved by the feed motor 13 at a low speed (for example, 180 mm).
/ Sec) to feed the leading end of the paper P to the position of the transport roller 16. And the sent paper P is
In the print unit 2, the image information of the film is printed for each frame. In the present invention, the feeding mechanism A is set at a lower speed than the transport speed of the transport motor 13 at a low speed.
Therefore, the sensor S3 is always in a light-shielding state at the start of feeding because the feeding speed at the time of low speed is increased. Then, when the sensor S3 is shielded from light by the looped paper P, the feeding of the paper P is stopped from a low speed. Then, the paper is successively 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 delivery of the paper P is switched from the stop to the low speed. I have. And paper P
Until the leading end of the paper is engaged with the transport roller 18 via the transport roller 17, the printing unit 2 prevents the paper from loosening and swelling, and accurately positions the paper at the exposure position. In order to form punch holes well, it is necessary to increase feed accuracy. Therefore, the transport speed of the paper P by the transport motor 13 is lower than the feed speed of the paper P (250 mm / sec), for example, 180 mm / sec. Next, after the leading end of the paper P is engaged with the transport roller 18, the transport speed of the transport motor 13 is switched to a high speed, for example, 630 mm / sec, in order to improve the paper processing operation. In this case, when the paper P enters a loop L1 and the sensor S1 becomes transparent, the paper P sending speed is increased, and when the sensor S2 is shielded from light, the speed is reduced. To stop. Therefore, once switching to low speed, the sensor S1
Is not switched as fast as is not transmitted. The above operation is repeated to continue the printing operation.

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

[0015]

As described above, according to the feeding method of the present invention, the speed at which the paper is fed is reduced at the start of feeding, and from the low speed when the feeding is stopped. Therefore, the slack in the magazine is absorbed and no slack is generated in the magazine. Therefore, abnormal noise and paper damage generated from inside the magazine are eliminated. In addition, since the load during paper conveyance is constant, the accuracy of the paper conveyance amount is improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a photographic processing apparatus according to a sending-out method of the present invention.

[Explanation of symbols]

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

Claims (3)

(57) [Claims] 1. A a magazine for accommodating a photosensitive material wound in a roll, out feed to exit sends the magazine or al sense light material
Mechanism and form a loop in the fed photosensitive material
Baking a loop mechanism and the photosensitive material passing through the loop mechanism.
Print section and develop the baked photosensitive material
And a developing unit for feeding the photosensitive material in a photographic processing apparatus comprising:
After detecting the photosensitive material via the loop mechanism,
After sending out to the loop forming amount by its own weight, photosensitive material
And (2) looping the photosensitive material by its own weight by the loop mechanism.
And (3) holding the photosensitive material at a position downstream of the loop mechanism.
After that, the above-mentioned feeding mechanism can speed up the photosensitive material at high speed.
Sending out and further forming a loop; (4) the feeding machine after a predetermined loop is formed
The photosensitive material is fed at a low speed by the
Transport roller located downstream of the
Sends photosensitive material to the printing section at a lower transport speed than
And feeding the photosensitive material. (5) The light-sensitive material is obtained by the step (4).
By detecting that the loop forming amount of
Speed of feeding of the photosensitive material by the feeding mechanism.
And (6) detecting that the loop molding amount has decreased.
By this, the feeding of the photosensitive material by the feeding mechanism is performed.
Switching the operation from stop to low speed . 3. The printing method according to claim 1, wherein the tip of the photosensitive material is printed.
Until it gets stuck in the transport rollers located downstream of the
Idawa adjusts the transport speed of the photosensitive material by the delivery mechanism.
A step of slower than feeding speed of the photosensitive material, caught on the conveying roller tip (8) the light-sensitive material
Afterwards, the process of switching the photosensitive material transport speed to high speed
If, it becomes less loop forming amount of (9) the photosensitive material, prior
High speed feeding of photosensitive material by the feeding mechanism
And the loop forming amount of the photosensitive material is increased, before Symbol Feed
The feeding speed to a low speed, and then the loop forming amount of the photosensitive material.
When the number is further increased, the step of stopping the delivery speed
3. The delivery method according to claim 2 , further comprising :