JPH01149050A - Photographic development processing device - Google Patents

Abstract

PURPOSE:To carry photographic paper in an adequate state so that photographs can be satisfactorily formed by providing a photographic paper loop forming mechanism which loops the photographic paper between carrying rollers. CONSTITUTION:A movable guide plate 50 is provided on the outside surface side of the photographic paper P between the 1st intermediate carrying roller 34A and 2nd intermediate carrying roller 34B in succession to the inlet carrying roller 32 by pivotally supporting said plate in such a manner that the plate rotates around the axis X between a close position for guiding the photographic paper P and the open position for permitting looping L of the photographic paper P in a space 37 for looping the photographic paper by opening outward along the perpendicular passage from the 1st intermediate carrying roller 34A to the 2nd intermediate carrying roller 34b. The length of the loop is thereby varied when the carrying speed of the photographic paper changes. The fluctuation in the speed is absorbed by such varying and the carried photographic paper is prevented from being pulled or slacked. Flawing of the emulsion surface and the generation of a jam are thus prevented.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a photographic processing apparatus.

[Background of the invention]

Generally, when forming a photograph, it is necessary to print the image onto photographic paper using a negative film that has been photographed and developed, and then to develop the photographic paper. used.

FIG. 3 is an explanatory diagram showing the outline of an automatic photo processing system, in which 1 is a printer, 2 is a developing processing section, 3 is a drying section, and 4
1 shows a part of the cutter, and the developing section 2, the drying section 3, and the cutter section 4 constitute a photographic developing bag. In the printer 1, a light source lamp 11;
A reflecting mirror 12 is provided, and the optical image formed by these mirrors on the negative film N is exposed to the photographic paper P pulled out from the photographic paper roll storage section 13 to perform printing.

This printed photographic paper P is then conveyed to pass through a development processing tank 21, a bleach-fixing processing tank 22, and a stabilization processing tank 23 consisting of three types, which constitute the development processing section 2 of the photographic processing apparatus, in this order. Development processing is performed. The photographic paper P that has been developed in this way is then transferred to a drying section 3.
After being dried, for example by hot air, it is cut with a cutter part 4 to form a photograph.

[Problem that the invention seeks to solve]

In the photographic processing apparatus of the automatic photographic processing system as described above, the developed photographic paper may swell or shrink depending on the processing conditions or drying conditions such as temperature changes in the drying section. In addition, the thickness of the photographic paper changes due to changes in the moisture content of the photographic paper, and as a result, the photographic paper discharged from the drying section may not be sufficiently dried, or the photographic paper may become loose, resulting in a paper jam called a jam. Otherwise, an excessive tensile force is applied, and as a result, the emulsion surface and the roller rub against each other, resulting in scratches on the image surface.

[Purpose of the invention]

The present invention solves the above-mentioned problems and can reliably absorb fluctuations in the transport speed of photographic paper in the drying section, thereby transporting the photographic paper in a suitable state. It is an object of the present invention to provide a photographic processing apparatus which can achieve good photographic formation.

[Means for Solving the Problems] The photographic processing apparatus of the present invention includes a processing tank for developing printed photographic paper, a drying section for drying the photographic paper from the processing tank, and a drying section for drying the photographic paper from the processing tank. A feeding roller that feeds the photographic paper from the tank into the drying section, a plurality of conveyance rollers located within the drying section that conveys the photographic paper, and a photographic paper loop forming mechanism that forms a loop in the photographic paper between the conveyance rollers. It is characterized by having the following.

〔effect〕

According to such a configuration, a loop is formed in the photographic paper in the drying section, so that when a change occurs in the transport speed of the photographic paper, the speed change is absorbed by changing the length of the loop. As a result, the photographic paper is not stretched or loosened as it is transported, preventing scratches on the emulsion surface and paper jams, thus ensuring stable photographs. can be formed into

〔Example〕

Examples of the present invention will be described below.

FIG. 1 is an explanatory diagram of a drying section 3 in a photographic processing apparatus according to an embodiment of the present invention, in which photographic paper P subjected to development processing in the development processing section 2 is transferred to the drying section 3 by a feeding roller 31. sent. This photographic paper P is then distributed along the front and rear surfaces of the hot air blowing unit 40 as a whole.
It is conveyed along the letter-shaped drying section path by an entrance conveyance roller 32 and an outlet conveyance roller 33, as well as three intermediate conveyance rollers 34A, 34B and 34C in the illustrated example provided in the middle. 35 is a guide roller.

Between the first intermediate conveyance roller 34A and the second intermediate conveyance roller 34B following the artificial conveyance roller 32, on the outer surface side of the photographic paper P, a movable guide plate 50 is provided as shown by a solid line. There is a closed position where the photographic paper P is guided along the vertical path from the intermediate conveyance roller 34A to the second intermediate conveyance roller 34B, and a space where the photographic paper P is opened outward as shown by the broken line to form a photographic paper loop. 37, and an open position allowing the formation of the loop L at 37.

Specifically, as shown in FIG. 2, a gear 62 is fixed to a rotating shaft 60 of one of the second intermediate conveying rollers 34B via a friction clutch 61. A drive gear 63 connected to a drive motor (not shown) via a chain or the like is meshed with the drive gear 63 . In this example, the axis X coincides with the central axis of the rotating shaft 60, and one end of each of the side plates 51, 51 of the movable guide plate 50 is pivoted to rotate freely around the rotating shaft 60. .

A spring (not shown) is provided to restrain the movable guide plate 50 in the closed position, and an actuating protrusion 52 protruding outward from one side plate 51 of the movable guide plate 50 is biased. A first rotary solenoid 53 is connected thereto, which opens the movable guide plate 50 to the open position via the operating protrusion 52 against the spring. Further, a stopping model wheel 65 is fixed to the rotating shaft 60,
A second rotary solenoid 68 is provided with a hook 67 at its tip, which engages with the stopping wheel 65 to stop its rotation when energized. On the right, the other roller of the second intermediate conveyance roller 34B that is paired with the one roller described above is configured to be driven, for example, by being coupled with a gear, but it is also possible to configure it as a driven roller.

Further, a first photographic paper detection mechanism 41 is arranged downstream of the second intermediate transport roller 34B, a second photographic paper detection mechanism 42 is arranged upstream of the exit transport roller 33, and a photographic paper detection mechanism 41 is arranged downstream of the second intermediate transport roller 34B. A loop detection mechanism 43 is arranged in the loop formation space 37. 45 is the movable guide plate 5 in the closed position
This is an inner side guide plate that guides the photographic paper P together with 0.

In addition to such a configuration, the entrance conveyance roller 32, the exit conveyance roller 33, and the intermediate conveyance rollers 34A, 34B, and 3
4C is driven and the movable guide plate 50 is in the closed position, when the photographic paper P is fed in by the feed roller 31, the leading edge of the photographic paper P passes the second intermediate conveyance roller 34B. When the first photographic paper detector t'j141 detects that the photographic paper P has reached the second intermediate conveyance roller 34B, this signal causes the first rotary solenoid 53 and the second rotary solenoid 67 to be activated. Powered by this! At the same time, the first rotary solenoid 53 rotates the movable guide plate 50 via the operating protrusion 52 and opens it from the closed position to the open position, and at the same time, the second rotary solenoid 67 causes the hook 67 to move to the stopping model wheel 65. By engaging, the rotation of the rotating shaft 60 is stopped, and the second intermediate conveyance roller 34B is stopped. However, the gear 62 is still continuously rotated by the drive gear 63.

As a result, the leading edge of the photographic paper P is detected by the first photographic paper detection mechanism 41.
However, since the subsequent portion is continuously fed in by the feed roller 31 in this state, it eventually reaches the second intermediate conveyance roller 3 downstream of the first intermediate conveyance roller 34A.
At a position upstream of 4B, a loop L is formed in the photographic paper P in an outwardly bulging state. When the loop L formed in the photographic paper loop forming space 43 becomes large and its existence is confirmed by the loop detection mechanism 44, the second rotary solenoid 67 is deenergized and the stopped state of the rotating shaft 60 is released. As a result, conveyance by the second intermediate conveyance roller 34B is restarted.

Then, the photographic paper P is continuously conveyed along the path leading to the cutter portion 4, and in this state, the photographic paper P that has been developed is dried while being conveyed.

Note that when the rear end of the photographic paper P is discharged from the drying section 3, the movable guide plate 50 is moved to its closed position by detecting that the photographic paper P is not present by the second photographic paper detection mechanism 42. It is returned to its original state and prepared for feeding the next photographic paper.

According to the present invention, as described above, a loop L is formed in the photographic paper P between the first intermediate conveyance roller 34A and the second intermediate conveyance roller 34B, and in this state, the loop L is formed in the photographic paper P. Because conveyance is performed, even if the conveyance speed of the photographic paper P changes due to swelling or shrinkage or a change in thickness due to a change in water content in the drying section 3, the speed of conveyance of the photographic paper P will be is absorbed in the form of contraction or expansion of the loop L, and as a result, the photographic paper P being transported is prevented from becoming loose or being subjected to excessive tensile force, and paper jams and emulsion surfaces are prevented. No scratches will occur due to friction between the roller and the roller.

Although one embodiment of the present invention has been described above, various modifications can be made to the present invention.

For example, the area of the photographic paper in which the loop should be formed can be selected as appropriate. However, it is preferable to use the first half of the drying section 3. Further, the specific configuration of the photographic paper loop forming mechanism is not limited to the illustrated example, and various configurations may be adopted.

As described above, according to the present invention, a loop is formed in the photographic paper in the drying section, so that when the conveyance speed of the photographic paper changes, the length of the loop changes, thereby eliminating the speed fluctuation. As a result, the photographic paper being transported is not stretched or slackened, which prevents scratches on the emulsion surface and paper jams, thus ensuring a good print quality. Photographs can be formed stably.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of essential parts of a photographic processing apparatus according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing an example of the configuration of the second intermediate conveyance roller in the example of FIG. 1. , FIG. 3 is an explanatory diagram showing an outline of the automatic photo processing system. 1... Printer 2... Photographic processing device 3... Drying section 4... Cutter part 11.
...Light source lamp 12...Reflector 13...Photographic paper roll storage section P...Photographic paper N...Negative film 21
...Development processing tank 22...Bleach-fixing processing tank 2
3... Stabilization treatment tank 31... Feed roller 32
...Artificial conveyance roller 33...Exit conveyance roller 34A, 34B, 34C...Intermediate conveyance roller 35...Guide roller 37...Space for forming a photographic paper loop 40...Temperature Air blowing unit 41...First photographic paper detection mechanism 42...Second photographic paper detection mechanism 43...Loop detection mechanism 45...Inner side guide 50...Movable guide plate 51... Side plate L...
Loop 52... Operating protrusion 53... First rotary solenoid 60... Rotating shaft 61... Friction clutch

Claims (1)

[Claims] 1) a processing tank for developing the printed photographic paper, a drying section for drying the photographic paper from the processing tank, and a feeding roller for feeding the photographic paper from the processing tank to the drying section;
A photographic processing apparatus comprising: a plurality of conveyance rollers that convey photographic paper within a drying section; and a photographic paper loop forming mechanism that forms a loop in the photographic paper between the conveyance rollers.