JPH0449624Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention exposes the original information obtained from the original placed on the original table glass onto a photosensitive material such as photographic film or photographic paper, and then extracts the exposed photosensitive material. The present invention relates to an image forming apparatus in which images are sequentially passed through processing liquid tanks installed according to a development process for development processing.

[Background of the idea]

Generally, in this type of image forming apparatus, a development processing section having a processing liquid tank for developing the image-exposed photosensitive material and a transport section for transporting the photosensitive material to the development processing section are adjacent to each other. An aperture is provided for the photosensitive material to pass through. Therefore, the evaporated gas generated from each processing liquid tank in the development processing section enters the conveyance section through these holes and condenses on the conveyance rollers and guide plates, corroding them or reducing conveyance performance. There was a problem. Particularly, when the machine is not operating, when the exhaust fan for forcibly discharging the evaporated gas outside the machine is stopped, more evaporated gas enters the machine, and countermeasures are needed.

[Purpose of invention]

In view of the above points, this idea was developed by blocking the openings provided in the walls adjacent to the conveying section and the developing section, except when the photosensitive material is being conveyed from the conveying section to the developing section, thereby preventing the evaporation generated from the processing liquid tank. It is an object of the present invention to provide an image forming apparatus that prevents gas from entering the conveyance section side and prevents corrosion and deterioration of conveyance performance due to wetting of rollers and guide plates.

[Structure of the idea]

In order to achieve the above object, this invention includes a paper feeding section that has a cutting device that cuts the photosensitive material wound and housed in a magazine into a predetermined length, and an exposure device that image-wise exposes the cut photosensitive material in the paper feeding section. An image forming apparatus comprising: a transport section provided with a window; and a development processing section adjacent to the transport section and having a processing liquid tank for developing an image-exposed photosensitive material; A shutter is provided in an opening provided in an adjacent wall of the shutter, which is normally biased by a spring in the closing direction and is opened by a solenoid each time the photosensitive material passes.

〔Example〕

Next, this invention will be explained based on embodiments shown in the accompanying drawings. Note that this invention is not limited to the embodiments described here.

FIG. 1 is a schematic sectional view of an image forming apparatus according to this invention. In this figure, 10 is an image exposure section;
Reference numeral 20 designates a paper feeding section for the photosensitive material, 30 a conveying section, 40 a developing processing section, and 50 a drying section.

The image exposure section 10 includes a document table glass 11, a light source 12, a first mirror 13, a second mirror 14, a third mirror 15, a lens 16, and a shutter 17. A first scanning unit consisting of the light source 12 and the first mirror 13 moves parallel to the document table glass 11 to expose and scan the document, and a second scanning unit consisting of the second mirror 14 and the third mirror 15 moves parallel to the document table glass 11. It is mounted on a table and is adapted to move in the same direction as the first scanning unit and at half the speed of movement of the first scanning unit. This image exposure section 10 is almost similar to that used in known electrophotographic copying machines, but uses an odd number of mirrors to invert the image and expose a latent image corresponding to the original image. It is designed to be formed directly on the photosensitive surface of the material. The shutter 17 opens the exposure window 3 in synchronization with the exposure scan.
7 is open, and the rest are closed to prevent light from leaking into the transport section 30.

The photosensitive material used in this invention is preferably a silver halide photographic material for obtaining a high-quality copy image (color or black and white) in which a positive image is formed by a development process after exposure. It is also applicable to light-sensitive materials other than silver oxide photographic light-sensitive materials. Such silver halide photographic materials may be, for example, internal latent image type or other direct reversal type silver halide photographic materials, or reversal type (reversal development type) materials. The support (base) may be opaque paper or the like or a transparent film.

The paper feed section 20 has a magazine 21 in which the photosensitive material is wound in a roll and stored in a light-tight manner removably installed therein, and also has a drawer roller 23 and a drawer for pinching and pulling out the photosensitive material from the magazine 21. A cutting device 24 is provided to cut the end when it reaches a predetermined length.

The conveying section 30 includes a path 34 having conveying rollers 31, 32, and 33 for photosensitive material cut into a predetermined length, and a first accumulator 35 provided above the path 34 for once winding up and storing the photosensitive material.
and a second accumulator 36 provided below the path 34. The conveyance roller 31~
Reference numeral 33 is a device that can be rotated forward and backward, and transfers the photosensitive material fed from the paper feed section 20 to the first accumulator 35.
After being transported to the second accumulator 36, it is reversed and
lower towards. This second accumulator 3
6, the photosensitive material passes through the exposure window 37 of the image exposure section 10, during which the original image is exposed. Therefore, the speed of the photosensitive material during this downward movement is synchronized with the light source scanning speed. The exposed photosensitive material accommodated in the second accumulator 36 is again accommodated in the first accumulator 35 by the conveyance rollers 31 to 33, and the switching claw 38 provided in the middle of the path 34 is switched. This leads to the passage 34' communicating with the development processing section 40.

The photosensitive material that has entered the passage 34' is held between the conveyance rollers 39 and transferred to the conveyance section 30 and the development processing section 40.
The photosensitive material is sent to the development processing section 40 through an opening 302 provided in a wall 301 adjacent to the photosensitive material.

The development processing section 40 includes a first developer tank 41A and a second developer tank 4 in a housing 400 that can be pulled out from the main body of the apparatus.
1B, a bleach-fix tank 41C, a first stabilization tank 41D, and a second stabilization tank 41E. This is to facilitate inspection and repair of the inside of each tank, inspection and repair of the drive system and replenishment circulation system, and removal of jamming of photosensitive material generated in the transport system within the tank. A guide roller 422 for drawing in the photosensitive material fed through the opening 302 is provided at the entrance portion 42 of the first developer tank 41A.

The photosensitive material guided to the first developer tank 41A passes through a plurality of groups of submerged conveyance rollers 44 provided in a passage 43 filled with processing liquid, and reaches the second developer tank 41B, whereupon the photosensitive material discharged from the second developer tank 41B The material is then sent to the bleach-fixing tank 41C via a transfer roller 45 provided outside the solution, and similarly from the bleach-fixing tank 41C to the first stabilizing tank 41D and from the first stabilizing tank 41D to the second stabilizing tank 4.
1E, the photosensitive material that has undergone all the development processes through the final tank 41E is sent to the drying section 50 via a conveying roller 46 provided at its exit. In this drying section 50, the photosensitive material is sandwiched between a conveyance roller 51 and a conveyance wire 52, and its upper and lower surfaces are dried with hot air by a hot air dryer 53, and then discharged from the apparatus through a discharge roller 54.

In addition, in the first developing tank 41A, there is an exposure tube 4 having an exposure window 47a facing the photosensitive material passage 43.
7b and a lamp house 47 provided above it.
The light from C can be applied to the photosensitive material as reverse exposure.

As described above, a shutter 303 is provided in the opening 302 provided in the wall 301 adjacent to the conveyance section 30 and the development processing section 40. This shutter 303 closes the opening 302 except when the photosensitive material passes through the opening 302, and prevents evaporative gas generated from each processing liquid tank in the developing processing section 40 from entering the conveying section 30. belongs to.

Although the movable means for the shutter 303 is not particularly limited, an example thereof is shown in FIGS. 2 and 3.
In this example, the shutter 303 is swingably suspended from the wall surface above the aperture 302 via links 304a and 304b, and the aperture 302 can be opened and closed by the action of the link when the shutter 303 swings. This shutter 303 is biased in the closing direction by a tension spring 305, and the closed position is held by a stopper 306 against which the shutter 303 hits. Further, the opening operation uses a rotary solenoid 307 connected to the one link 304a as a driving source.

The rotary solenoid 307 is energized, for example, by a detection signal from a paper feed detector, and the shutter 30
3 is opened, and when a detector (not shown) in the development processing section 40 detects that the rear end of the photosensitive material has entered the development processing section 40, it becomes a non-energized state (free).
, the spring 305 acts and the shutter 30
Return 3 to the closed state. In other words, the shutter 303 is configured to be opened and closed each time a sheet of photosensitive material passes through the aperture 302. Of course, the shutter 303 can be configured to remain open while the power switch is turned on and turned off, and other controls are also possible. Further, it may be movable by a movable means other than a link type.

[Effect of idea]

As explained above, this invention includes a paper feeding section that has a cutting device that cuts the photosensitive material wound and housed in a magazine into a predetermined length, and an exposure window that exposes the cut photosensitive material imagewise in the paper feeding section. A transport section equipped with
In an image forming apparatus provided with a development processing section adjacent to the transport section and having a processing liquid tank for developing the image-exposed photosensitive material, an opening provided in a wall adjacent to the transport section and the development processing section. The present invention is characterized in that a shutter is provided which is biased by a spring in the closing direction during normal times and is opened by a solenoid each time the photosensitive material passes, so that the shutter provided on the wall adjacent to the conveyance section and the development processing section is It is possible to close the hole except when the photosensitive material passes through the hole,
It is possible to completely restrict the evaporated gas generated from each processing liquid tank in the development processing section from entering the conveyance section side, and it is possible to prevent corrosion of the conveyance rollers and guide plates and deterioration of conveyance performance due to the intruding gas. In particular, this system has an excellent effect in that it functions more effectively when the machine is at rest, when the exhaust fan for forcibly discharging evaporative gas to the outside of the machine is stopped.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of the image forming apparatus of this invention, FIG. 2 is a sectional view of the main parts, and FIG. 3 is a schematic perspective view of the image forming apparatus. 30... Conveyance section, 34... Route, 34'... Route communicating with the development processing section, 301... Adjacent wall, 3
02...Opening hole, 303...Shutter, 304a,
304b... link, 305... tension spring,
306...stopper, 307...rotary solenoid.

Claims (1)

[Scope of utility model registration request] a paper feeding section having a cutting device that cuts the photosensitive material wound and housed in the magazine into a predetermined length; a transporting section equipped with an exposure window for image-wise exposing the photosensitive material cut by the paper feeding section; and the transporting section. In an image forming apparatus, the image forming apparatus is provided with a development processing section adjacent to the processing section and having a processing liquid tank for developing the image-exposed photosensitive material.
The shutter is provided in an opening provided in a wall adjacent to the conveyance section and the development processing section, and is normally biased by a spring in the closing direction, and is opened by a solenoid each time the photosensitive material passes through. Image forming device.