JP2003195463A - Rubber roller and automatic developing machine equipped with the rubber roller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain very stable and accurate carrying property for a long time by improving the mechanical durability of the rubber roller of a pair of nip rollers provided in the respective processing tanks and a stabilizing treatment chamber of an automatic developing machine, and to stably obtain a high-quality print by attaching the rubber roller to the respective processing parts of the automatic developing machine. <P>SOLUTION: This rubber roller is used as one roller constituting a pair of nip rollers for carrying thin film material, and has length five times or more as long as the outside diameter of the roller, and its center part in an axial direction is constituted of a flat roller whose outside diameter is made substantially uniform and both ends continuous to the center part have length 1/2 to 3 times as long as the outside diameter of the roller so as to constitute an outside diameter part thinner than the outside diameter of the center part. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber roller used as a nip roller pair for conveying a thin film material such as a silver halide photographic light-sensitive material, and more particularly to a color paper such as photographic paper as the silver halide photographic light-sensitive material. The present invention relates to a rubber roller of a nip roller pair used as a conveying unit of an automatic developing machine for processing.

[0002]

2. Description of the Related Art Normally, a rubber roller used as a nip roller pair for conveying a thin film material such as a silver halide photographic light-sensitive material is a flat roller whose outer diameter is uniform over its entire length. In particular, in the anhydrous washing process that follows the bleach-fixing process of an automatic processor that processes silver halide color paper (hereinafter also simply referred to as color paper) as a silver halide photographic light-sensitive material, it is used for transporting color paper. In addition, a configuration is proposed in which a flat rubber roller having a uniform outer diameter over the entire length is set as a nip roller pair, with a part of the roller being immersed in the treatment liquid and the other part being exposed to the air. ing.

[0003]

A rubber roller used as a nip roller pair for conveying a thin film material such as a silver halide photographic light-sensitive material is a flat roller whose outer diameter is uniform over the entire area. . Normally, a rubber roller is manufactured by blending raw rubber and additives → kneading (mastication, kneading, aging) → molding → vulcanization, and a polishing process for adjusting outer diameter formation and core runout through a cooling process. Produced. Here, the rubber roller manufactured is ground into a flat roller whose outer diameter is uniform over the entire area, and a substantially uniform flat roller is manufactured. Because of the openness, the elasticity of the rubber often causes escape from the polishing member during polishing, resulting in a deviation of the outer diameter of the roller. In particular, when both ends are opened, the rubber escapes toward the end during polishing, and the roller end diameter tends to increase.

When a thin-film material such as a silver halide photographic light-sensitive material is conveyed, if the diameter of the roller end portion becomes large, a gap is generated between the pair of conveying nip rollers to reduce conveyance stability, and skew, lateral deviation, jam, etc. It is easy to become a factor. Further, in the case where a rubber roller is brought into contact with a processing liquid composed of various chemical substances such as a thin film material such as color paper of a silver halide photographic light-sensitive material, it is generally a processing liquid containing an active material. However, the conveyance stability is reduced due to skewing of the color paper, and when the roller end diameter becomes large, the roller end wears more specifically than the central part.
A phenomenon may occur in which the reaction with the chemical agent progresses and the deformation progresses.

The present invention improves the conveyance stability when conveying a thin film material such as a silver halide photographic light-sensitive material, prevents conveyance defects such as jams, and prevents specific wear and deformation of the roller end. It is an object of the present invention to provide a rubber roller of a nip roller pair for improving roller durability and an automatic developing machine for silver halide photographic light-sensitive materials equipped with the rubber roller.

[0006]

This object is achieved by any of the following technical means (1) to (11).

(1) A rubber roller which is used as one roller forming a nip roller pair for transporting a thin film material and has a roller length of 5 times or more the outer diameter of the roller, the central portion in the axial direction having the outer diameter. Is a substantially uniform flat roller, and both end portions following the central portion each have a length that is 1/2 to 3 times the outer diameter of the roller and have an outer diameter smaller than the outer diameter of the central portion. A rubber roller having a diameter portion.

(2) The rubber roller according to item (1), wherein the shape of the portion having the small outer diameter forms a conical surface that is inclined.

(3) The roller forming a nip roller pair with the rubber roller is a hard roller whose outer diameter is substantially uniform over its entire length. (1) or (2) Rubber roller described.

(4) In an automatic processor for processing a silver halide photographic light-sensitive material, a nip roller pair is provided as a means for conveying the silver halide photographic light-sensitive material, and one roller of the nip roller pair is located at the central portion in the axial direction. A flat roller portion having an outer diameter that is substantially uniform is formed, and both end portions that follow the central portion have a roller outer diameter of 1 /
An automatic developing machine, which is a rubber roller having an outer diameter portion having a length two to three times smaller than the outer diameter of the central portion, and which is mounted at a position in contact with a processing liquid.

(5) In an automatic processor for processing a silver halide photographic light-sensitive material, a nip roller pair is provided as a means for conveying the silver halide photographic light-sensitive material, and one roller of the nip roller pair is located at the central portion in the axial direction. A flat roller portion having an outer diameter that is substantially uniform is formed, and both end portions that follow the central portion have a roller outer diameter of 1 /
A processing roller, which is a rubber roller having a length of 2 to 3 times and forming a conical surface with an inclination from the outer peripheral surface of the central portion to form an outer diameter smaller than the outer diameter of the central portion. An automatic processor characterized by being installed in a place where it comes into contact with.

(6) In an automatic processor for processing a silver halide photographic light-sensitive material, a nip roller pair is provided as a means for transporting the silver halide photographic light-sensitive material, and one roller of the nip roller pair is located at the central portion in the axial direction. A flat roller portion having an outer diameter that is substantially uniform is formed, and both end portions that follow the central portion have a roller outer diameter of 1 /
A rubber roller having an outer diameter portion having a length two to three times smaller than the outer diameter of the central portion, and the other roller is a hard roller whose outer diameter is substantially uniform over the entire length. The automatic developing machine is characterized in that the pair of nip rollers are mounted at a position where they come into contact with the processing liquid.

(7) In an automatic processor for processing a silver halide photographic light-sensitive material, a nip roller pair is provided as a means for conveying the silver halide photographic light-sensitive material, and one roller of the nip roller pair is located at the central portion in the axial direction. A flat roller portion having an outer diameter that is substantially uniform is formed, and both end portions that follow the central portion have a roller outer diameter of 1 /
A rubber roller having a length of 2 to 3 times and forming a conical surface by inclining from the outer peripheral surface of the central portion to form an outer diameter smaller than the outer diameter of the central portion. The automatic developing machine is characterized in that the roller is a hard roller whose outer diameter is substantially uniform over its entire length, and the nip roller pair is mounted at a position where it comes into contact with the processing liquid.

(8) Any one of the items (4) to (7), characterized in that a part of the rubber roller is immersed in the treatment liquid, and the rubber roller is mounted in a place where the remaining part is exposed to the air. The automatic processor according to item 1.

(9) The treatment liquid is a stabilizing treatment liquid (an anhydrous washing treatment liquid) following the bleach-fixing step, and the treatment liquid is any one of (4) to (8). Automatic developing machine.

(10) The rubber material of the rubber roller is
The automatic developing machine according to any one of (4) to (9), which is a silicone rubber.

(11) The material of the hard roller used as the pair of the rubber rollers of the nip roller pair is polypropylene, polyethylene, high molecular weight polyethylene, ultra high molecular weight polyethylene, fluororesin, phenol resin, polyphenylene ether, polyphenylene oxide, polyphenylene sulfide. An automatic processor according to item (6) or (7), which is a material selected from

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an example of a specific example relating to the present invention will be shown as an embodiment, but the present invention is not limited thereto. Further, in this embodiment, there are assertive expressions for terms and the like, but they show preferred examples of the present invention, and do not limit the meaning or technical scope of the terms of the present invention.

The automatic developing machine 8 for developing the image-exposed exposed cut paper P1 by cutting a color paper P such as photographic paper as a silver halide photographic light-sensitive material into a predetermined length and continuously developing it It is an automatic processor for processing a large number of cut papers P1 as a large number of silver halide photographic light-sensitive materials.

In the following, regarding the automatic processor 8 of the present embodiment, FIG. 1 is a schematic configuration diagram of the printer processor 5 in which the automatic processor 8 is combined with the automatic printing device 7, and the automatic processor of the present embodiment. Description will be given based on FIG. 2 which is a schematic configuration diagram of the developing machine 8, FIG. 3 which is a schematic configuration diagram of the stabilization processing chamber thereof, FIG. 4 which is a top view of the liquid reservoir portion thereof, and FIG. 5 which is a front view thereof. .

The automatic developing machine 8 of the present embodiment is an automatic printing device 7, which is a silver halide photographic light-sensitive material for printing such as color paper (color photographic paper) or color print film which is printed by image exposure ( Hereinafter, these will be collectively referred to simply as color paper P) and cut paper P
1 is a developing process to obtain a print, and the finished print is sent to the sorter 9.

The automatic printing device 7 pulls out the color paper P from the color paper magazine M in which the color paper P is stored in a roll shape by a length corresponding to the print size, and a pull-out roller pair 75. The exposure stage 7 includes a cutter 76 that cuts the color paper P into a length corresponding to the print size, and a cut paper P1 that is the leading color paper cut by the cutter 76.
4 and the cut paper P1
To a predetermined printing position for image exposure, and then an exposure stage 74 that conveys the image-cut cut paper P1 to the downstream side in the conveyance direction, and the cut paper P1 conveyed from the exposure stage 74 to the accumulation conveyance section 79. The delivery roller pair 78 that is rapidly sent and the cut paper P1 that is delivered by the delivery roller pair 78 are rapidly received, and the cut paper P1 is quickly received.
An accumulation transporting unit 79 is provided for transporting 1 to the automatic developing machine 8 at the transporting speed of the automatic developing machine 8.

Further, a photographic film (negative) which is conveyed to a predetermined image exposure position and printed on the cut paper P1.
Film frame 72 for moving the frame image of the photographic film, an illuminating unit 71 for illuminating the frame image of the photographic film at the position of the film carrier 72, and image information of the frame image of the photographic film illuminated by the illuminating unit 71. A projection lens 73 is provided for performing image exposure on the cut paper P1 on the exposure stage 74.

As shown in FIG. 2, the automatic developing machine 8 processes the cut paper P1 conveyed from the automatic printing device 7 while conveying it at a constant speed to obtain a finished cut paper P1. And cut paper P1
As a processing liquid container for storing the processing liquid to be brought into contact with the cut paper P1 for processing, a plurality of liquid tanks are provided side by side as shown below. That is, a color developing solution which is brought into contact with the cut paper P1 for color developing processing of the cut paper P1 baked by the automatic printing device 7 is stored, and the cut paper P1 is dipped in the color developing solution to perform the color developing processing. In order to bleach-fix the color development processing bath 110 and the color-developed cut paper P1, the bleach-fixing solution is stored, and the cut paper P1 is dipped in the stored bleach-fixing solution to perform the bleach-fixing processing. In order to stabilize the processing tank 120 and the cut paper P1 that has been bleach-fixed, a stabilizing treatment liquid is present on the surface of the cut paper P1 of the color paper P, and the cut paper P1 is conveyed in a gas. Stabilization chamber 130 having a stabilization treatment rack 131 to be transported along, and a drying chamber 1 for drying the stabilized cut paper P1.
0 is provided so that the cut paper P1 dried in the drying chamber 160 is sent to the sorter 9 as a print.

In the stabilization processing chamber 130, the stabilization processing rack 131 is mainly used to convey the cut paper P1 in the gas while the stabilization processing liquid is present on the surface of the cut paper P1 as the color paper P. The cut paper P1 is processed by being transported along the path.

In the color development processing tank 110, a specified amount is put into the color development processing tank 110 with respect to the processing area of the photosensitive material to be processed tablets J1. For example, by integrating the color paper processing area, turning on the processing number tablets prescribed amount for each 0.2m ² ~1.5m ^2. At this time, a predetermined amount of replenishing water for dilution and dissolution is supplied from the water supply tank 20 to the color development processing tank 110 by the bellows pump 21. The color development processing bath 110 is provided with an overflow drain, and the overflow is drained to the waste tank 60.

In the bleach-fixing processing tank 120, a prescribed amount is put into the bleach-fixing processing tank 120 for the processed area of the photosensitive material to be processed with the processed tablet J2. For example, by integrating the color paper processing area, turning on the processing number tablets prescribed amount for each 0.2m ² ~1.5m ^2. At this time, replenishing water for dilution and dissolution is supplied from the overflow tank 50 from the stabilization processing chamber 130 to the bleach-fixing processing tank 120 by the bellows pump 51 in a specified amount. The bleach-fix processing tank 120 is provided with an overflow drain, and the overflow is discharged to the waste tank 60.

The water is supplied to the water supply tank 20 by an operator. From the water supply tank 20 to the color development processing tank 11
0 and the stabilizing treatment liquid stock tank 40 are supplied with a predetermined amount of supplementary water for diluting and dissolving the treated tablet J3 by the bellows pump 22.

The stabilizing processing liquid stock tank 40 is a tank for storing the stabilizing processing liquid, and the processing tablet J3 is put into the processing tank in a specified amount with respect to the processing area of the photosensitive material to be processed. . For example, by integrating the color paper processing area, turning on the processing number tablets prescribed amount for each 0.2m ² ~1.5m ^2. At this time, a prescribed amount of supplementary water for dilution and dissolution is supplied from the water supply tank by the bellows pump 22.

Further, in the stabilizing treatment liquid stock tank 40, a treating liquid circulating system by the magnet pump 23 is formed to dissolve the treated tablets J3 to be homogenized to make the concentration of the treating liquid in the stabilizing treatment liquid stock tank uniform.

From the stabilizing treatment liquid stock tank 40 to the nip roller pair 305 of the liquid reservoir 300 at the uppermost stage of the stabilizing treatment chamber 130 and the liquid reservoir 301, a pipe 43 is used by using a pump 43 such as a bellows pump or a magnet pump. Through the supply port 212, the processing liquid is supplied. The pump 43 such as a bellows pump or a magnet pump is used by intermittently operating, and the supply amount is about 40 ml / min to 300 ml / min. The uppermost liquid reservoir 300 of the stabilization processing chamber 130
The stabilization treatment liquid supplied to the above flows from the upper stage to the lower stage through the slit 312 (shown in FIG. 5) through which the paper of each liquid storage tray 301 passes, and the circulation of the upper stabilization treatment liquid near the central stage of the stabilization treatment chamber 130. The structure is such that the liquid is discharged from the liquid storage tray 301 which also serves as the recovery tray 301A and returns to the stabilizing treatment liquid stock tank 40 by a natural drop (drop).

Further, the circulation collecting tray 30 for the upper stabilizing solution is provided.
The stabilizing treatment liquid is supplied from the stabilizing treatment liquid stock tank 40 by the bellows pump 44 to the liquid reservoir 300 immediately below 1A. The stabilizing treatment liquid is in one pass from the liquid collecting tray 301 immediately below the circulation collecting tray 301A of the upper stabilizing treatment liquid in the stabilizing treatment chamber 130 to the lower liquid collecting tray 301 in the stabilizing treatment chamber 130. The structure is such that it flows to the lower stage, and a concentration gradient is formed as the concentration of the bleach-fixing treatment liquid brought into the stabilization treatment chamber 130.
That is, the processing concentration of the bleach-fixing solution contaminated toward the upper stage of the stabilization processing chamber 130 decreases.

The stabilizing treatment liquid reservoir 300 is composed of a liquid reservoir 301 and a pair of nip rollers 305 as shown in the top view of FIG. 4 and the AA front sectional view of FIG. On the emulsion surface of the color paper P, a rubber roller 305B made of silicon rubber or the like having a thin outer end is used, and on the back surface (base surface) of the color paper P, a hard roller 305A made of phenol resin or the like is used. The stabilizing treatment chamber 130 is provided with a stabilizing treatment liquid discharge port 215 at the bottom thereof, and the treatment liquid dropped from the liquid storage section 300 at the bottom of the stabilizing treatment chamber 130 is discharged from the discharging port 215 to the stabilizing treatment liquid overflow tank. Sent to 50.

The stabilizing solution discharged from the lower stage of the stabilizing chamber 130 is the stabilizing solution overflow tank 50.
And is supplied to the bleach-fixing processing tank 120 by a bellows pump 51 as supplementary water for diluting and dissolving the bleach-fixing processing tank 120. In addition, the surplus not used in the replenishing water for diluting and dissolving the bleach-fix processing liquid is discharged to the waste liquid tank 60 from the overflow portion installed in the stabilization processing liquid overflow tank 50.

By the way, as shown in FIG. 2, the stabilizing solution used in the stabilizing chamber 130 is prepared and stored in the stabilizing solution stock tank 40. The stabilizing treatment liquid stock tank 40 includes a solid stabilizer supply unit 30 for supplying the treated tablet J3 as a solid stabilizer, and a bellows pump 22 for supplying a predetermined amount of dilution water from the dilution water supply tank 20. Is attached, and a detection member (not shown) for detecting the amount of the stabilizing treatment liquid stored in the stabilizing treatment liquid stock tank 40 is provided. When the detecting member detects that the amount of the stabilizing treatment liquid stored in the stabilizing treatment liquid stock tank 40 is equal to or less than a predetermined amount, the solid stabilizer supply unit 30.
Supplies a predetermined amount of the treated tablet J3 as a solid stabilizer, and the bellows pump 22 supplies the dilution water supply tank 2
A predetermined amount of dilution water is supplied from 0, and a stabilizing treatment liquid having a constant concentration is prepared and stored.

Then, the pump 4 is added to the liquid reservoir 300 provided on the stabilization processing rack 131 in the stabilization processing chamber 130.
3, 44 supply the stabilizing treatment liquid from the stabilizing treatment liquid stock tank 40. The stabilization treatment liquid supplied by the heater is heated to a predetermined stabilization treatment temperature.

Next, the stabilizing process will be described with reference to the side sectional view of FIG. 3, which is a schematic configuration diagram of the stabilizing rack 131 of the stabilizing chamber 130, the top view of FIG. 4 and the front sectional view of FIG. To do. Stabilization rack 1 in the stabilization chamber 130
Reference numeral 31 denotes a plurality of nip roller pairs 3 provided along a predetermined transport path for transporting the cut paper P1 from below to above.
05, and a plurality of nip roller pairs 305 convey the photographic paper from below to above along a predetermined conveying path. Further, the stabilization processing chamber 130 is provided with a liquid storage tray 301 for temporarily storing the stabilization processing liquid, corresponding to each nip roller pair 305. The pair of nip rollers 305 and the liquid reservoir 301 form a liquid reservoir 300.

Then, a liquid storage tray 30 for the first stabilization treatment liquid
1, the stabilizing treatment liquid is supplied from the supply port (nozzle) 212.

That is, the stabilizing solution is first temporarily stored in the stabilizing solution reservoir 301 at the uppermost position, and then successively drops into the lower solution reservoir 301, and the intermediate solution is dropped. Part of the stabilizing treatment liquid supplied to the upper half of the lower part is returned to the stabilizing treatment liquid stock tank 40, and is also supplied to the uppermost liquid reservoir 300 in the lower half of the middle stage. A part of the stabilizing treatment liquid in the lower half portion sequentially drops into the lower liquid storage tray 301, and finally through the discharge port 215 at the bottom of the stabilizing treatment chamber 130 to the stabilizing treatment liquid overflow tank 50. Collected.

Further, the stabilizing treatment liquid supplied to the liquid reservoir 301 of the stabilizing treatment liquid is brought into direct contact with the nip roller pair 305, whereby the stabilizing treatment liquid is transferred to the nip roller pair 3
Then, the stabilizing treatment liquid is supplied to the cut paper P1 by the nip roller pair 305.

On the other hand, the pair of nip rollers 305 conveys the cut paper P1 (printing paper) from the lower side to the upper side, so that the multi-stage countercurrent process can be performed. Therefore, the efficiency of the stabilization process is improved.

The stabilizing treatment liquid discharged from the lower half liquid reservoir 300 is stored in the stabilizing treatment liquid overflow tank 50 as shown in FIG. In order to supplement the water content of the bleach-fix processing solution used, a part of the stabilizing processing solution is appropriately sent to the bleach-fix processing tank 120 by the pump 51.

Next, each liquid reservoir 300 will be described.
As described above, FIG. 4 is a top view of each liquid reservoir 300, and FIG. 5 is a front sectional view taken along the line AA of FIG.

Side plates 302 are formed on both sides of the liquid tray 301 of each liquid reservoir 300, and roller position regulating members 304 are provided outside the side plates 302. The shaft 306 of the nip roller pair 305 is rotatably supported in the recess of the roller position regulating member 304 via a bearing 308, and both ends of the shaft 306 are prevented from coming off by E-rings 309. Both ends of the shaft 306 of the pair of nip rollers 305 are urged from above the bearing 308 by nip springs 310 in a direction toward each other with a predetermined spring force.

By the rotation of the nip roller pair 305, the cut paper P1 is conveyed between the nip roller pair 305. The nip spring 310 is located in a recess 303 formed between the side plate 302 and the roller position restricting member 304. Further, in order to prevent the liquid from accumulating in the concave portion 303, a discharge hole 311 for discharging the liquid from the concave portion 303 is formed, and the stabilization treatment liquid dropped into the concave portion 303 drops downward from the discharge hole 311. .

A slit 312 is formed in the liquid tray 301 of the stabilizing liquid, the cut paper P1 passes through the slit 312 from below and is sandwiched between a pair of nip rollers 305, and the nip roller pair 305 rotates. Is conveyed upward by. Guides 313 for guiding the carry-in of the cut paper P1 are formed on both sides of the slit 312 on the carry-in side. In this way, the upper stabilization processing liquid reservoir 30
The cut paper P1 passing through the slit 312 of the stabilizing treatment liquid reservoir tray 301 while allowing the treatment liquid to be present on the surface of the cut paper P1 while dropping the treatment liquid from the lower portion 1 to the stabilizing treatment liquid reservoir tray 301. Is conveyed in the gas from the lower side to the upper side by a pair of nip rollers 305, and is processed in a multi-stage countercurrent system.

In the stabilizing process, the nip roller pair 305 in which the hard roller 305A having a higher rigidity and the elastic rubber roller 305B are in pressure contact with each other is more accurate than the one in which the rubber rollers are in pressure contact with each other in terms of accuracy of conveyance. It is used a lot. However, if both rollers are flat rollers having substantially uniform outer diameters as shown in the side view of FIG. 6, the outer diameters of the end portions of the roller are actually increased when the rubber roller is manufactured (during the polishing step). Misalignment easily mixes in, and if used for a long period of time, the transportation stability of skew, lateral misalignment, jam, etc. is reduced when transporting thin film sheets such as photographic photosensitive materials. Sometimes there was a phenomenon coming. In order to solve this, in the present invention, as shown in the side view of FIG.
The outer diameter portion of both ends of 5B is made smaller than the outer diameter of the flat portion in the central portion. At this time, the outer diameter of the outermost portion is preferably smaller than that of the flat portion by 1% or more.

FIG. 7 shows a structure in which the outer diameter is reduced.
As shown in the side view of (b), the diameter is reduced from the uniformly flat outer diameter portion of the central portion to a conical shape, and the flat outer diameter is reduced again to reach the roller end surface. Alternatively, as shown in the side view of FIG. 7 (c), the outer diameter of the central flat portion may be reduced to a conical outer diameter to reach the roller end surface. It was also possible to obtain good results in durability.

Even when the rigid hard roller 305A forming the nip roller pair 305 is a rubber roller instead of a hard roller, the same dimensional relationship as described above is used, and the hard roller is substantially the same as the hard roller. I confirmed that it was effective.

The rubber material of the rubber roller is preferably silicone rubber, ethylene-propylene copolymer rubber, fluororubber, fluoroprene rubber or nitrile rubber, of which silicone rubber is more preferred.

Further, the hard roller 30 used as a pair of the rubber roller 305B of the nip roller pair 305.
The material of 5A is polypropylene, polyethylene, high molecular weight polyethylene, ultra high molecular weight polyethylene, fluororesin,
A material selected from phenol resin, polyphenylene ether, polyphenylene oxide, and polyphenylene sulfide is preferable.

Incidentally, in FIG. 4, a rubber roller 305B of the type shown in FIG. 7C is combined with a flat hard roller 305A having high rigidity, and is constructed as shown in FIG.

Next, the structure and processing method of the first embodiment of such a rubber roller 305B will be described with reference to the sectional view of FIG. 9, the side view of FIGS. 10A and 10B and the side view of FIG. .

In FIG. 9, a pipe material made of SUS316 (outer diameter 2
4 mm, inner diameter 22 mm) is provided as a base body 321A, and a shaft 306 is concentrically provided with a phenol resin 321B at both ends to form a boss portion 321C. Bonded with an adhesive. Then, a silicon rubber lining 3 having a rubber hardness of 40 degrees is provided on the peripheral surface of the base body 321A.
21D and its outer diameter is ground,
After a flat roller having a uniform outer diameter is formed as shown in FIG. 10A, both end portions 321 are formed as shown in FIG.
A rubber roller 305B is obtained in which the outer diameter of F is processed to be small and the boss portion 321C is formed. The material of the base 321A may be phenol resin or polyphenyl sulfide other than SUS316. However, when such a resin material pipe is used, it is desirable that the wall thickness be 1.5 to 4 mm in order to improve rigidity. An example of the finished rubber roller has an outer diameter of 30 m as shown in FIG.
m, roller surface length 300 mm, both ends boss outer diameter 26 m
m, the end length was 30 mm, the axial length of the 45 ° inclined portion of the step was 1 mm, and the diameter of the shafts at both ends was 8 mm.

Next, the rubber roller 305 of the second embodiment.
B will be described. This is processed in the same manner as in the first embodiment up to the state shown in FIG.
2, a portion 321 shown by a dotted line at both ends as shown in the side view of FIG.
G is a conical shape that is polished and finished.

Rubber roller 305 made in this way
B is as shown in the side view of FIG. 13, and the roller outer diameter is 2
5 mm, the roller surface length is 270 mm, and the conical surface portions on both ends have a conical surface with the outer diameter changed from 25 mm to 23 mm while the end portion length is 20 mm.

The outer diameter of the flat roller portion after processing of the rubber roller 305B of the first and second embodiments thus formed is measured and plotted in the graph of FIG. 14, which is substantially the same. It remains flat. On the other hand, the outer diameter of the rubber roller flattened over the entire length as in the prior art is measured after processing and plotted, as shown in the graph of FIG. This shows that the outer diameters at both ends are abnormally changed.

In the automatic developing machine equipped with the rubber roller 305B of the present invention, a good state can be maintained for a long time without causing a conveyance failure such as a skew or a jam.
In the conventional rubber roller having a flat overall length, an unstable conveyance state was found due to conveyance defects such as skew and jam.

As described above, according to the present invention, the obstacle that impairs the mechanical durability is eliminated, and stable and correct transportation can be continued for a long time.

Incidentally, a supplementary explanation will be given as follows for each technical means of each claim of the present invention.

In general, the rubber roller having a roller length of 5 times or more the outer diameter of the roller has a long roller length with respect to the outer diameter of the roller. Therefore, when the roller is manufactured as described in the problem to be solved by the invention. During the polishing process itself, the outer diameter of the roller end tends to increase, and phenomena such as deformation and wear due to long-term use of the roller are more likely to occur, and the transport stability of the thin film material by the roller deteriorates. .

On the other hand, in the present invention, it was possible to obtain good results by defining both end portions following the central portion so as to have a length of 1/2 to 3 times the outer diameter of the roller. Here, since the rubber roller has a roller length of 5 times or more the roller outer diameter, when the roller length is 5 times the roller outer diameter, both end portions following the center portion have a roller outer diameter of 3 times. Can not. Therefore, since the roller has a flat portion, in this case, the thin outer diameter portion is necessarily 2.5.
Means less than twice.

According to the second aspect, the conical surface inclined obliquely is formed, but since the outer diameter smaller than the flat portion can be surely formed by adding the polishing work once on each side, the processing cost is so high. Not only that, the cost is cheap.

The roller forming one of the pair of nip rollers is a hard roller whose outer diameter is substantially uniform over the entire length, and a hard roller using a resin material or a metal material is different from rubber roller polishing. Such an outer diameter can be easily formed, the outer diameter accuracy is higher than that of the rubber roller, and the outer diameter of the end portion does not increase specifically, which is preferable for conveying the thin film material. In a silver halide photographic light-sensitive material such as color paper, it is desirable to use it as a roller which comes into contact with the base surface (rear surface), and it is preferable to use the rubber roller of the present invention on the emulsion surface in order to strengthen and stabilize the carrying force.

A fourth aspect of the present invention is an automatic developing machine using the rubber roller according to the first aspect as one roller of a nip roller pair, which is durable and stable for a long period of time even when used in a stabilization processing chamber under poor conditions. It was possible to provide an automatic processor capable of ensuring good paper conveyance and obtaining good quality prints.

Claim 5 is an automatic developing machine in which the rubber roller according to claim 2 is used as one roller of a nip roller pair, and the color is durable and stable for a long period of time even when used in a stabilizing chamber under poor conditions. It was possible to provide an automatic processor capable of ensuring good paper conveyance and obtaining good quality prints.

According to a sixth aspect of the present invention, there is provided an automatic developing machine in which the rubber roller according to the first aspect is used as one roller of a nip roller pair, and a flat hard roller having a uniform outer diameter over the entire length is used as the other roller. Thus, an automatic processor capable of ensuring high-quality and stable printability of color paper for a long period of time even when used in a stabilizing chamber where conditions are poor and providing good quality prints can be provided.

Regarding claim 7, there is provided an automatic developing machine in which the rubber roller according to claim 2 is used as one roller of a nip roller pair and a flat hard roller having a uniform outer diameter over the entire length is used as the other roller. Thus, an automatic processor capable of ensuring high-quality and stable printability of color paper for a long period of time even when used in a stabilizing chamber where conditions are poor and providing good quality prints can be provided.

According to claim 8, in an automatic processor equipped with the rubber roller at a position where a part of the rubber roller is immersed in the processing liquid and the remaining part is exposed to the air, a thin film of a silver halide photographic light-sensitive material or the like is used. When the diameter of the roller end portion is increased when the material is conveyed, a gap is generated between the pair of the conveyance nip rollers, and the conveyance stability is reduced, which is likely to cause skew, lateral deviation, jam, and the like. When the rubber roller is brought into contact with a processing liquid composed of various chemical substances such as a thin film material such as a color paper of a silver halide photographic light-sensitive material, the processing liquid is eluted from the processing agent or the color paper P. Since it contains an activator, the stability of conveyance is reduced due to skewing of the color paper, and when the roller end diameter increases, the roller end wears more specifically than the central part, A phenomenon may occur in which the reaction with the chemical agent progresses and the deformation progresses.

In a place where a part of the rubber roller is soaked in the processing liquid and the remaining part is exposed to the air, it is more susceptible to the processing liquids made of various chemical substances. Is the liquid reservoir 30 of the stabilization processing chamber 130.
It was possible to bring about a stable transport effect by taking particular care with respect to the roller pair that constitutes 0.

According to the ninth aspect, in the stabilization processing chamber handling the stabilization processing solution (processing solution for anhydrous washing processing) subsequent to the bleach-fixing processing step, the processing solution and the like made of various chemical substances are in contact with the rubber roller. In particular, contact is made with the treatment liquid containing the active material. When the roller end diameter becomes large due to the activator component contained in the stabilizing treatment liquid (treatment liquid for anhydrous washing treatment) taken out from the bleach-fixing treatment process and the roller end diameter becoming large, the roller end portion becomes the central portion. It may facilitate abrasion more specifically or facilitate the phenomenon of deformation due to reaction with chemical agents.
In order to prevent this, the diameter of the roller end portion is reduced, so that the phenomenon described above is suppressed and the effect of maintaining the conveyance stability is increased.

According to the tenth aspect, silicon rubber has a large chemical resistance to a processing liquid of a processing agent of a silver halide photographic light-sensitive material as a material of a rubber roller,
It is also a preferable material because it can increase the carrying force of thin film materials such as color paper.

Claim 11 Each of the materials used here has a large chemical resistance to the processing solution of the processing agent of the silver halide photographic light-sensitive material and is unlikely to be corroded. In addition, as a workability, when manufacturing the outer diameter of the roller by polishing, the outer diameter can be processed uniformly, and in the case of materials that can be processed such as extrusion molding, the outer diameter of the formed roller It has good diameter uniformity and is favorable, and is preferable as a constituent material of the hard roller.

[0074]

According to the present invention regarding the shape of the rubber roller of the nip roller pair for conveying the cut paper, which is provided in each processing tank or stabilizing processing chamber of the automatic developing machine, peculiar wear or deformation of the rubber roller end portion is prevented. In view of the mechanical durability of the rubber roller, it is possible to maintain a sufficiently stable and accurate transport property without causing skewing and jamming for a long time. By attaching to each processing unit, high quality prints can be stably obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a printer processor in which an automatic developing device of the present invention is connected to an automatic printing apparatus.

FIG. 2 is a schematic configuration diagram of an automatic developing machine according to an embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of a stabilization processing chamber of an automatic processor.

FIG. 4 is a top view of a liquid reservoir of the stabilization processing chamber.

FIG. 5 is a front cross-sectional view of a liquid reservoir of the stabilization processing chamber.

FIG. 6 is a side view of a pair of nip rollers equipped with a conventional rubber roller.

FIG. 7 is a side view showing some shapes of the rubber roller of the present invention.

FIG. 8 is a side view of a nip roller pair equipped with the rubber roller of the present invention.

FIG. 9 is a sectional view of an example of an embodiment of a rubber roller of the present invention.

FIG. 10 is a side view showing the order of the polishing process of an example of the embodiment of the rubber roller of the present invention.

FIG. 11 is a side view showing finished dimensions of an example of an embodiment of a rubber roller of the present invention.

FIG. 12 is a side view showing a polishing position of another example of the embodiment of the rubber roller of the present invention.

FIG. 13 is a side view showing the finished dimensions of another example of the embodiment of the rubber roller of the present invention.

FIG. 14 is a graph of outer diameter measurement results after immersion in the treatment liquid in an example of the embodiment of the rubber roller of the present invention.

FIG. 15 is a graph showing an outer diameter measurement result of an example of a conventionally used rubber roller after immersion in a treatment liquid.

[Explanation of symbols]

5 Printer processor 7 Automatic printing device 8 Automatic processor 9 Sorter 110 Color development tank 120 Bleach-fixing tank 130 Stabilization chamber 131 Stabilization rack 160 drying room 300 liquid reservoir 301 Liquid Reservoir 305 nip roller pair 305A Hard roller with rigidity 305B rubber roller 306 axis 308 bearing 310 Nip spring 312 slit P color paper P1 cut paper

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Makoto Takahashi             7 Koni, 591 Kamihirose, Sayama City, Saitama Prefecture             Within Ka Corporation F-term (reference) 2H098 AA03 CA05 CA09 CA11 CA17                 3F049 AA01 AA10 CA04 CA11 CA16                       DA11 LA01 LB05

Claims (11)

[Claims] 1. A rubber roller which is used as one roller forming a nip roller pair for conveying a thin film material and has a roller length of 5 times or more of the roller outer diameter,
The central portion in the axial direction is composed of a flat roller having a substantially uniform outer diameter, and both end portions following the central portion each have a length which is 1/2 to 3 times the outer diameter of the roller. A rubber roller having a portion having an outer diameter smaller than the outer diameter of the rubber roller. 2. The shape of the portion having a small outer diameter forms a conical surface that is inclined obliquely.
The rubber roller described in 1. 3. The rubber roller according to claim 1, wherein the roller forming a nip roller pair with the rubber roller is a hard roller whose outer diameter is substantially uniform over its entire length. 4. An automatic processor for processing a silver halide photographic light-sensitive material, wherein a nip roller pair is provided as a means for transporting the silver halide photographic light-sensitive material, and one roller of the nip roller pair is located outside the central portion in the axial direction. A flat roller portion having a substantially uniform diameter is formed, and both end portions subsequent to the central portion have a length which is 1/2 to 3 times the outer diameter of the roller, and the outer diameter of the central portion. An automatic processor characterized in that it is a rubber roller that constitutes an outer diameter portion that is smaller than that of the above, and is mounted at a place where it comes into contact with the processing liquid. 5. An automatic processor for processing a silver halide photographic light-sensitive material, wherein a nip roller pair is provided as a means for conveying the silver halide photographic light-sensitive material, and one roller of the nip roller pair is located outside the central portion in the axial direction. A flat roller portion having a substantially uniform diameter is formed, and both end portions following the central portion have a length of 1/2 to 3 times the outer diameter of the roller, and the outer peripheral surface of the central portion. Is a rubber roller that forms a conical surface by inclining to form a portion having an outer diameter smaller than the outer diameter of the central portion, and is mounted in a place in contact with the processing liquid. . 6. An automatic processor for processing a silver halide photographic light-sensitive material, wherein a nip roller pair is provided as a means for conveying the silver halide photographic light-sensitive material, and one roller of the nip roller pair is located outside the central portion in the axial direction. A flat roller portion having a substantially uniform diameter is formed, and both end portions subsequent to the central portion have a length which is 1/2 to 3 times the outer diameter of the roller, and the outer diameter of the central portion. Is a rubber roller that constitutes a smaller outer diameter portion, the other roller is a hard roller whose outer diameter is substantially uniform over the entire length, and the nip roller pair is mounted at a position where it contacts the processing liquid. An automatic processor characterized in that 7. An automatic processor for processing a silver halide photographic light-sensitive material, wherein a nip roller pair is provided as a means for conveying the silver halide photographic light-sensitive material, and one roller of the nip roller pair is located outside the central portion in the axial direction. A flat roller portion having a substantially uniform diameter is formed, and both end portions following the central portion have a length of 1/2 to 3 times the outer diameter of the roller, and the outer peripheral surface of the central portion. Is a rubber roller that forms a conical surface by inclining to form an outer diameter smaller than the outer diameter of the central portion, and the other roller is a hard roller whose outer diameter is substantially uniform over the entire length. An automatic developing machine, characterized in that the nip roller pair is a roller and is mounted at a place where the nip roller comes into contact with the processing liquid. 8. The rubber roller is mounted at a location where a part of the rubber roller is immersed in the treatment liquid and the remaining part is exposed in the air.
An automatic processor according to item. 9. The automatic developing machine according to claim 4, wherein the processing solution is a stabilizing processing solution (an anhydrous washing processing solution) following the bleach-fixing step. 10. The rubber material of the rubber roller is silicone rubber.
An automatic processor according to item. 11. The material of the hard roller used as the pair of the rubber rollers of the nip roller pair is polypropylene, polyethylene, high molecular weight polyethylene, ultra high molecular weight polyethylene, fluororesin, phenol resin, polyphenylene ether, polyphenylene oxide, polyphenylene sulfide. The automatic developing machine according to claim 6 or 7, which is a material selected.