JPH0636094B2 - Photographic developing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic printing and developing apparatus in which an image is printed on a photosensitive material supplied from a photosensitive material supply section in a printing section and developed in a developing section.

2. Description of the Related Art There is a photographic printing developing apparatus in which a printing unit for printing an image of a film on a printing paper and a developing unit for developing a printing paper on which an image is printed are connected.

In this type of photographic printing developing apparatus, a printing paper reservoir portion is provided between the printing portion and the developing portion to absorb the difference in processing speed between the respective portions, that is, the difference in transport speed of the printing paper. The photographic paper reservoir portion is provided with guide rollers located on the printing portion side and the developing portion side, respectively, and the photographic paper intermediate portion is bent in a loop between the rollers. As a result, the difference in printing paper transport speed between the printing unit and the developing unit is absorbed, and the printing paper can be transported smoothly.

[Problems to be Solved by the Invention] Since the photographic printing paper has hygroscopicity, the photographic printing paper absorbs moisture or guides when the atmospheric conditions of the photographic printing paper reservoir are excessively high. There is a problem in that the photographic paper may be unnecessarily attached to the guide roller due to dew condensation on the roller, and may be wound or bent. On the other hand, if the atmospheric conditions of the photographic paper reservoir are excessively low, the photographic paper becomes too dry and static electricity is generated. There is also a problem that exposure or noise radio waves adversely affect other auxiliary equipment arranged inside the photographic printing and developing apparatus, particularly a microcomputer or its sensor, causing malfunction.

In consideration of the above facts, the present invention, when conveying the photographic paper after the printing process in the printing section to the developing section, the atmospheric conditions are optimized to the conveyance conditions of the photographic paper, and the photographic paper to be conveyed is An object of the present invention is to obtain a photographic printing and developing apparatus which can be stably conveyed without being unnecessarily wound, bent or statically generated.

[Means for Solving Problems] A photographic printing developing apparatus according to the present invention is a photographic printing developing apparatus in which an image of a photosensitive material supplied from a photosensitive material supply section is printed in the printing section and developed in the developing section. There is a blower which is arranged between the photosensitive material supply section and the developing section and which can introduce external air or discharge internal air by rotating in the forward and reverse directions, and the blower when a set condition is reached. Control means for switching the rotation direction of the.

[Operation] In the photographic printing and developing apparatus having the above-mentioned configuration, the outside air is introduced between the photosensitive material supply section and the developing section by the rotation of the blower, and the inside air is discharged by the rotation of the blower in the opposite direction. It If the internal air is exhausted,
The moist air in the developing section flows into between the photosensitive material supplying section and the developing section.

For this reason, when the photographic paper tends to get damp due to high atmospheric conditions between the photosensitive material supply section and the developing section, such as in the summer, the outside air is introduced and fed to the photographic paper to supply the photosensitive material supply section. The atmospheric condition between the developing section and the developing section can be a humidity suitable for carrying the printing paper.

On the other hand, when the photographic paper is likely to dry due to low humidity such as in winter, that is, when the atmospheric condition between the photosensitive material supplying section and the developing section falls below the set humidity, the rotation direction of the blower is controlled by the control means. It is switched and the internal air is discharged. Along with the discharge of the internal air, the moist air in the developing section flows into between the photosensitive material supplying section and the developing section, and the atmospheric condition during this time can be set to the humidity suitable for conveying the printing paper. Therefore, the photographic paper will not be too dry.

In this way, the atmospheric conditions between the photosensitive material supplying section and the developing section can be set to a humidity suitable for the transportation of the printing paper throughout the four seasons, and the printing paper can be stably maintained without adversely affecting the transportation of the printing paper. Be transported.

[Embodiment] FIG. 1 is a schematic sectional view of a photographic printing and developing apparatus 10 according to the present invention.

The photographic printing developing device 10 is composed of a printing section 12 and a developing section 14. A printing paper magazine 16 as a photosensitive material supply unit is arranged in the printing unit 12, and the printing paper 18
Are rolled up and stored. The photographic paper 18 drawn out from the photographic paper magazine 16 is sequentially guided and conveyed to the printing section 20. Print section 2
At 0, an optical system 22 and a light source 24 for printing an image of a negative film on the photographic printing paper 18 are arranged. In this case, the photographic printing paper 18 is conveyed while being alternately moved and stopped in accordance with the printing process performed for each image frame.

The printing paper 18 after the printing process is sent to the reservoir unit 26,
Further, after passing through the reservoir portion 26, it is sent to the developing portion 14.

Guide rollers 34 and 36 located on the printing section 12 side and the developing section 14 side are respectively arranged in the reservoir section 26, and the intermediate portion of the photographic printing paper 18 is bent between the rollers in a lube shape. As a result, the difference in printing paper transport speed between the printing unit 12 and the developing unit 14 is absorbed, and the printing paper can be transported smoothly.

The developing section 14 is provided with a developing tank 28, a bleach-fixing tank 30, and a water washing tank 32, each of which is a processing bath filled with a processing solution and is adapted to develop the photographic paper 18 after exposure. There is.

A drying chamber 38 is disposed on the side of the washing tank 32, and the photographic printing paper 18 after development is dried in the drying chamber 38 and then taken out through the cutter unit 40.

A blower 42 is arranged above the reservoir portion 26. The blower 42 is rotatable in the forward and reverse directions, and when it rotates forward, outside air can be introduced into the reservoir section 26 and the print section 20. On the other hand, when it is reversed, the air in the reservoir section 26 and the print section 20 is discharged to the outside, and the moist air in the developing section 14 communicating with the reservoir section 26 is allowed to flow into the reservoir section 26. Has become.

A humidity sensor 44 is arranged near the blower 42 so that the humidity of the outside air can be detected. The humidity sensor 44 is connected to a control circuit (not shown), and operates when the humidity becomes lower than a set humidity to output a detection signal thereof. Further, the control circuit switches the rotation direction of the blower 42 based on the detection signal from the humidity sensor 44.

Next, the operation of this embodiment will be described.

The printing paper 18 on which the image has been printed in the printing unit 20 of the printing unit 12 is sent from the leading end to the light source 24 through the reservoir unit 26.

Generally, it is desirable to introduce outside air into the photographic printing paper conveying system such as the reservoir section 26 in the photographic printing / developing apparatus even under high humidity environmental conditions. Unnecessarily difficult to attach.

Here, the blower 42 uses the reservoir unit 2 as in the summer, for example.
When the atmospheric condition in 6 is high humidity, the air rotates in the positive direction, and the outside air is introduced into the reservoir section 26 and the printing section 20 and fed to the printing paper. Therefore, the photographic paper 18 excessively absorbs water and unnecessarily adheres to the guide rollers 34 and 36,
It will not wrap around or bend.

On the other hand, when the outside air condition is low and the atmosphere condition inside the reservoir portion 26 is also low as in the winter season, the humidity sensor 44 detects this and the rotation direction of the blower 42 is switched based on the detection signal. When the blower 42 rotates in the opposite direction, the air in the reservoir section 26 and the print section 20 is discharged to the outside, and the moist air in the developing section 14 communicating with the reservoir section 26 flows into the reservoir section 26. However, the atmospheric condition of the reservoir portion 26 can be set to a humidity suitable for carrying the printing paper. Therefore, the photographic printing paper 18 does not become excessively dry, static electricity is generated during transportation, the photographic printing paper is unnecessarily exposed by sparks, and other auxiliary equipment disposed in the photoprinting / developing apparatus due to noise radio waves. In particular, it does not adversely affect the microcomputer or its sensor.

The photographic printing paper 18 that has passed through the reservoir section 26 is sent to the developing section 14, is subjected to development processing in the processing tanks of the developing tank 28, the bleach-fixing tank 30, and the washing tank 32, and is further dried in the drying chamber 38, and then the cutter section 40. It is cut and taken out.

In the present embodiment, the humidity sensor 44 detects the humidity of the outside air and outputs the switching signal of the rotation direction of the blower 42 when the humidity becomes lower than the predetermined humidity. However, the humidity sensor 44 is not limited to this. The configuration may be such that the fan is arranged inside the section 26, the humidity inside the reservoir section 26 is directly detected, and the rotation direction of the blower 42 is switched when the atmospheric condition inside the reservoir section 26 becomes equal to or lower than a predetermined humidity.

Further, generally, the atmospheric condition in the reservoir portion 26 becomes high humidity when the temperature is high such as in summer, and the atmospheric condition in the reservoir portion 26 becomes low humidity when the temperature is low in winter. Therefore, a temperature sensor capable of detecting the outside air temperature may be provided in place of the humidity sensor 44 in the above-described embodiment, and the rotation direction of the blower 42 may be switched when the outside air falls below a predetermined temperature. Alternatively, the amount of charge may be detected by an electrostatic sensor and similarly controlled when the amount of charge is equal to or larger than a predetermined amount.

Further, in the above-described embodiment, the rotation direction of the blower 42 is automatically switched according to the outside air condition or the atmosphere condition of the reservoir portion 26, but the present invention is not limited to this, and a manual switch capable of switching the rotation direction of the blower 42 is used. A configuration may be adopted in which the rotation direction of the blower 42 is switched by manual operation.

Further, in order to control the maximum humidity, the rotation number of the blower may be changed or intermittent operation may be performed.

[Effects of the Invention] As described above, the photographic printing and developing apparatus according to the present invention is a photographic printing and developing apparatus in which an image is printed in the photosensitive material supplied from the photosensitive material supplying section or in the developing section and developed in the developing section. And a blower which is arranged between the photosensitive material supply section and the developing section and which is capable of introducing outside air or discharging internal air by rotating in the forward and reverse directions, and the blower of the blower when a set condition is reached. Since the control means for switching the rotation direction is provided, a special device such as a humidifier or a dehumidifier is added to the photoprinting / developing device when the photographic printing paper which has been subjected to the printing process in the printing part is conveyed to the developing part. It is possible to easily and inexpensively make the atmosphere conditions between the photosensitive material supply section and the developing section optimal for the conveyance conditions of the photographic paper without the need to provide the photographic paper, and the photographic paper to be conveyed is unnecessarily wound or bent. Or static electricity It has an effect that it can be stably transported without being generated.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a photographic printing and developing apparatus according to the present invention. 10 ... Photographic developing device, 12 ... Printing part, 14 ... Developing part, 18 ... Printing paper, 26 ... Reservoir part, 42 ... Blower, 44 ... Humidity sensor.

Claims (3)

[Claims] 1. A photographic printing developing apparatus in which an image is printed on a photosensitive material supplied from a photosensitive material supplying section in a printing section and is developed in a developing section, wherein the photosensitive printing apparatus is provided between the photosensitive material supplying section and the developing section. A blower that is arranged and can rotate in forward and reverse directions to introduce outside air or discharge internal air, and a control means that switches the rotation direction of the blower when a set condition is reached. Photographic printing and developing device. 2. The control means includes a humidity sensor capable of detecting the humidity between the photosensitive material supply section and the developing section or the outside air, and the rotation of the blower when the humidity sensor detects a predetermined humidity. The photographic printing and developing apparatus according to claim 1, wherein the direction is switched. 3. The control device according to claim 1, further comprising a temperature sensor capable of detecting the temperature of the outside air, and switching the rotation direction of the blower when the temperature sensor detects a predetermined temperature. Photographic printing and developing device.