JPH06324464A - Structure of sliding part of photosensitive material processing device - Google Patents

Abstract

PURPOSE:To prevent the unequal transportation of a photosensitive material by suppressing the wear of sliding parts. CONSTITUTION:A bearing 90 is inserted with a sleeve 110 molded to an approximately cylindrical shape and is integrally molded with a bearing member 100, a flange part 102 and a boss part 104 by molding nylon 12. A spur gear 94 is formed by inserting and welding a sleeve 114 molded to a simple structure of an approximately cylindrical shape onto the axial central part of a gear part 112. The sleeves 110, 114 which are the sliding parts between the bearing and the revolving shaft 44A of a roller 44 and between the spur gear and a shaft 118 are molded by using ultra-high-mol.wt. polyethylene having wear resistance and, therefore, the sliding surfaces hardly wear and roughening of the sliding surfaces and increasing of clattering do not arise even if the sliding surfaces deposited with the precipitate in washing water slides in this state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a sliding portion of a photosensitive material processing apparatus for processing a photosensitive material by sequentially dipping it in a processing solution such as a developing solution, a fixing solution and a washing water while conveying the photosensitive material.

[0002]

2. Description of the Related Art A photosensitive material on which an image has been exposed is successively dipped in a processing solution such as a developing solution, a fixing solution, and washing water by a photosensitive material processing apparatus to be processed, and then dried.
In such a photosensitive material processing apparatus, a large number of rollers are arranged to form a photosensitive material conveying path, and a driving force is transmitted from the same drive source to each roller via a gear train or the like. There is.

The photosensitive material inserted into the photosensitive material processing apparatus is immersed in a processing solution such as a developing solution, a fixing solution, or washing water while being conveyed by the rollers thus driven, and then dried. To be processed. Bearings and gears used in such a photosensitive material processing apparatus are
Precision processing and complicated processing can be done easily,
Generally, resin molded products are used in consideration of water resistance, chemical resistance and the like.

By the way, in a photosensitive material processing apparatus, a bearing that rotatably supports a roller and a gear that is rotatably supported by a shaft for transmitting a driving force to the roller are driven by a driving force while being immersed in a processing liquid. Is transmitted and rotates. At this time, in a photosensitive material such as photographic paper or film having a photosensitive layer formed of a silver halide emulsion, silver halide eluted from the photosensitive material is precipitated in a developing solution and a gear and a shaft rotatably supporting the gear are provided. Between the roller and the shaft of the roller and the bearing. Further, in the washing water after the fixing process is completed, the components in the fixing solution brought in by the photosensitive material react with water to form a precipitate such as aluminum hydroxide.

When the roller or gear rotates with such a deposit in the treatment liquid, the deposit acts as an abrasive to abrade the sliding parts of the bearing or gear, resulting in shaft or rotation. The gap between the shaft and the shaft is enlarged to rattle gears and rollers, and the frictional force to the shaft and rotating shaft is increased. Such an increase or rattling of the frictional force causes a change or increase in the load torque, appears as uneven rotation on the roller for conveying the photosensitive material, and causes unevenness based on the conveying speed in the photosensitive material. ing.

In order to eliminate such problems, it is possible to make bearings, gears, etc. from a wear-resistant material. Resin is relatively expensive and is not suitable for molding that requires a complicated shape or precision. In addition, the accuracy and strength could not be maintained even if they were simply combined with other resins.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above facts, and wear of the sliding portion due to adhesion of precipitates such as components in the treatment liquid and components produced by the treatment. It is an object of the present invention to provide a sliding portion structure of a photosensitive material processing device that suppresses the unevenness of the photosensitive material and prevents uneven conveyance of the photosensitive material.

[0008]

According to a first aspect of the present invention, there is provided a sliding portion structure of a photosensitive material processing apparatus, which is slidable relative to a shaft of a driving device for conveying the photosensitive material and relatively rotated. The sliding portion of the member to be formed is formed of an abrasion resistant resin member supported by a resin molding product resistant to a photographic processing liquid.

According to a second aspect of the present invention, there is provided a sliding portion structure of the photosensitive material processing apparatus according to the first aspect of the present invention, wherein the sliding portion structure is the abrasion resistant resin member. It is characterized by using a material to which molybdenum is added.

According to a third aspect of the present invention, there is provided a sliding part structure of the photosensitive material processing apparatus according to the first or second aspect of the present invention, wherein the relative rotating member has the endurance resistance. It is characterized in that an abradable resin member is joined to the resin molded product.

According to a fourth aspect of the present invention, there is provided a sliding portion structure of the photosensitive material processing apparatus according to the first or second aspect, wherein the relative rotating member is the resin. The wear resistant resin member is insert-molded into a molded product.

[0012]

In the structure of the sliding portion of the photosensitive material processing apparatus according to the first aspect of the present invention, the sliding portion having the surface which is brought into contact with and slides on the shaft of the member which rotates relative to the shaft has abrasion resistance. A resin member is arranged. The abrasion-resistant resin member includes polyethylene and the like, and among the polyethylene, an ultrahigh molecular weight polyethylene having a molecular weight of 1,000,000 or more is preferable.

The members that rotate relative to the shaft include gears that are rotatably arranged and bearings that support the rotating shaft of the roller. By using a wear-resistant resin on the sliding surface of the bearing or gear shaft, for example, silver halide that has precipitated in the developer, sodium hydroxide that has been precipitated in the washing water, etc. have adhered. Even if the shaft rotates relative to the shaft in this state, it is possible to prevent the sliding surface from being roughened by the precipitates, which increases the frictional force, and it is possible to prevent wear and increase of the gap between the shaft and the shaft, resulting in uneven transport. It does not occur.

Since the abrasion-resistant resin member is supported by the molded product of the photo-resistant liquid resin that constitutes the member that rotates relative to the shaft, the material of the rotating member can be selected, and the strength of the entire rotating member and the strength of the rotating member can be selected. The accuracy can be increased and the manufacturing cost can be reduced.

In the sliding portion structure of the photosensitive material processing apparatus according to the second aspect of the present invention, a wear resistant resin member to which molybdenum disulfide is added is used. For example, by adding molybdenum disulfide to a wear-resistant resin member such as ultra-high molecular weight polyethylene, the hardness can be increased and the surface can be smoothed when molded. This makes it more preferable for application to a member that rotates relative to the shaft.

In the sliding part structure of the photosensitive material processing apparatus according to the third aspect of the present invention, the abrasion-resistant resin member arranged in the sliding part of the member that rotates relative to the shaft has a substantially cylindrical shape. It is molded into a simple shape and is placed on a member that rotates relative to the shaft. For example, even if ultra-high molecular weight polyethylene, which is difficult to be precisely molded, is used for the sliding portion, it is possible to easily mold a gear or a bearing having a complicated structure if precise molding is required.

When the sleeve-shaped wear-resistant resin is joined to the bearing or the gear, an adhesive can be used, and a joining means such as ultrasonic welding can be used together therewith.

In the structure of the sliding portion of the photosensitive material processing apparatus according to the fourth aspect of the present invention, the so-called double molding is performed, in which the sliding portion formed of the abrasion resistant resin is insert-molded in the member which rotates relative to each other. For example, gears and bearings are molded. It is possible to strengthen the bond between the abrasion-resistant resin and the relative rotating member made of the photo-processable resin.

As described above, if the abrasion-resistant resin member has a simple shape, for example, a substantially cylindrical shape, it can be easily molded, and even if it is a component that requires precision or complicated processing, it is easy. It can be manufactured at low cost.

[0020]

[Embodiment 1] FIG. 1 shows an automatic developing apparatus 10 which is a photosensitive material processing apparatus to which the present invention is applied. The automatic developing apparatus 10 is a device in which a film 12, which is an example of a light-sensitive material, is dipped in a developing solution, a fixing solution and washing water to be processed, and then dried.

The automatic developing device 10 includes a developing section 18 having a developing tank 16 in a machine frame 14 and a fixing section 2 having a fixing tank 20.
2. A rinsing unit 26 including the rinsing tank 24, a rinsing unit 30 including a rinsing tank 28, and a drying unit 68 are provided.

Transport racks 38, 40, 42 having a plurality of roller pairs 32, 34, 36 (in the case of the washing tank 28, roller pairs 32, 36) in the developing tank 16, the fixing tank 20, and the washing tank 28, respectively. Are soaked in a developing solution, a fixing solution, and washing water.

The roller pair 32, 34 has a horizontal line connecting the axial centers of the rollers facing each other.
The line connecting the axes of the rollers facing each other is vertical, and a substantially U-shaped transport path for sandwiching and transporting the film 12 is formed by these roller pairs 32, 34, and 36.

The transport rack 38 of the developing tank 16 is provided with a pair of rollers 50 facing the insertion port 48, and holds and conveys the film 12 inserted from the insertion port 48. The film 12 sandwiched by the roller pair 50 is guided by a guide plate (not shown) (integrally formed with the transport rack 38) and sandwiched by the roller pair 32. Further, on the outlet side of the transport rack 38, a roller pair 52 in which a part of the lower roller is immersed in the processing liquid (developing liquid) is arranged. The line connecting the axes of the roller pair 52 is inclined, and has a role of transferring the film 12 to the fixing tank 20. On the contrary,
On the inlet side of the transport rack 40 of the fixing tank 20, a roller pair 54 in which a part of the lower roller is immersed in the processing liquid (fixing liquid).
Is arranged so as to receive the film 12 coming from the developing tank 16. The film 12 received is sandwiched by the roller pair 54, is directed downward, and is conveyed in a substantially U shape by the roller pair 32, 34, 36. On the outlet side of the transport rack 40, a roller pair 56 in which a part of the lower roller is immersed in the processing liquid (fixing liquid) is arranged. The line connecting the axes of the roller pair 56 is inclined, and has a role of transferring the film 12 to the rinse section 26.

The rinsing section 26 includes a fixing tank 20 and a washing tank 28.
A rinse tank 24 having a shallow bottom is provided between the rollers, and a roller pair 58 provided on the transport rack 40 of the fixing tank 20 is disposed in the rinse tank 24. The roller pair 58 is attached to a portion of the transport rack 40 on the right side in FIG. A rinse liquid is stored in the rinse tank 24, and the rinse liquid is pumped up by the lower roller of the roller pair 58 to wash the film surface and squeeze the fixing liquid.

The film 12 that has passed through the rinse section 26 is
It is sandwiched by a pair of rollers 64 provided on the inlet side of the transport rack 42 of the washing tank 28, the transport direction is changed downward, and thereafter, it is transported in a substantially U-shape by the roller pairs 32 and 36, and the roller pair on the outlet side. It is designed to be horizontally changed by 66. Here, the transport rack 42 of the washing tank 28 is extended on the right side in FIG. 1 toward the drying section 68, and a roller pair 70 is arranged. This roller pair 70
The film 12 is squeezed by being sandwiched between the two and is sent out to the drying section 68 in a horizontal state.

As described above, the film 12 has the insertion opening 48.
Inserted from the transport racks 38, 40, 42 of the respective processing tanks
And is conveyed while being sequentially immersed in a developing solution, a fixing solution, and washing water, and is subjected to development, fixing, and washing treatments. Further, the film surface is washed with the rinse liquid while being transferred from the fixing bath 20 to the washing bath 28.

FIG. 2 shows a sectional view of the main parts of the transport rack 42 arranged in the water washing tank 30 as an example of the rack. The roller pair 36 provided in the transport rack 42 will be mainly described below, and the description of the transport racks 38 and 40 and the roller pairs 32 and 34 having substantially the same schematic configuration will be omitted.

With respect to the pair of rack side plates 80 of the transport rack 42, a gear train 82 is provided on the side opposite to the transport path of the film 12.
Is provided, and each gear is rotatably supported via a shaft (not shown) attached to the rack side plate 80.

A drive force from the drive source is transmitted to the gear train 82 by a gear 86 that meshes with a worm gear 84A provided on a drive shaft 84 that is rotated by the drive force of a drive source (not shown). The drive shaft 84 is provided in the machine frame 14 of the automatic developing device 10 in the developing unit 18
From the drying unit 68, which will be described later, to the developing unit 1
The driving force of the driving source is also transmitted to each of the transport rack 38 of No. 8, the transport rack 40 of the fixing unit 22, and the drying unit 68.

The rollers 44, 46 of the roller pair 36 provided on the transport rack 42 are respectively rotated by bearings 90 inserted into and attached to through holes 88 formed at predetermined positions of the rack side plate 80. The shafts 44A and 46A are inserted and stretched between a pair of rack side plates 80. A spur gear 92 is attached to a tip end portion of the rotary shaft 44A of the one roller 44 protruding from the rack side plate 80,
The spur gear 92 meshes with a spur gear 94, which is one of the gears forming the gear train 82. As a result, the driving force transmitted from the drive shaft 84 to the gear train 82 is transmitted to the roller 44 via the spur gears 94 and 92.

Further, spur gears 96 arranged at the respective shaft end portions are meshed with each other between the rollers 44 and 46, and the driving force transmitted to the rollers 44 is transmitted through the spur gears 96. The roller pair 36 is transmitted to the roller 46 so that the roller pair 36 is rotationally driven along the transport direction of the film 12.

As shown in FIGS. 3 and 5A, the bearing 9
Reference numeral 0 denotes a flange portion 102 and a flange portion 100 that extend in an arc shape along the radial direction at one end of the cylindrical bearing body 100 and that extend in a rectangular shape on the opposite side extending in an arc shape. A plurality of bosses 104 (two in this embodiment) are integrally formed at the opposite end. It should be noted that one of the plurality of boss portions 104 is provided so as to project in the same direction as the flange portion 102.

The bearing 90 is attached by inserting the bearing body 100 into the through hole 88 formed at a predetermined position of the rack side plate 80 from the end on the boss 104 side. After that, the bearing 90 is slightly rotated about the axis of the bearing body 100, so that the flange portions 1 of the bearing 90 corresponding to each other are rotated.
02 are facing each other. In this state, the flange portion 102 and the one boss portion 104 form the rack side plate 8
It is arranged so as to sandwich the peripheral portion of the through hole 88 of 0, thereby preventing the bearing 90 from coming off.

The bearing 90 is provided with a groove-shaped recess 102A extending from the arcuate peripheral surface of the flange portion 102 to the rectangular end portion. The roller pair 36 is provided in the recess 102A.
A coil spring 106 for applying a nip force for sandwiching the film 12 is arranged between the two. The coil spring 106 is a bearing 9 that is opposed to each other while being fitted in the recess 102A.
It is wound between 0 and applies a biasing force in a direction approaching each other between the bearings 90 to apply a nip force between the roller pair 36.

As shown in FIG. 5A, a cylindrical sleeve 110 is arranged at the axial center of the bearing 90. The rotating shafts 44A and 46A inserted into the bearing 90 are the bearing 90
It is adapted to be inserted into the sleeve 110 inside.

As the sleeve 110, ultra high molecular weight polyethylene which is a resin having high abrasion resistance is used. Further, a bearing 90 provided with this sleeve 110
Uses nylon 12 as an example, which is low in cost, easy to process, and stable to a developing solution, a fixing solution, water and the like. The bearing 90 is manufactured by forming a sleeve in which ultra-high molecular weight polyethylene is molded into a simple cylindrical shape, which is difficult to perform complicated molding, and is set in a molding die of different kinds of resin, so-called insert molding is performed. For example, when the bearing body 100, the flange portion 102, and the boss portion 104 are integrally formed by injection molding or the like with nylon 12 that can easily perform complicated molding, the sleeve is insert-molded.

FIGS. 4 and 5B show a concrete example of attaching the sleeve by means other than insert molding. The spur gear 94 that constitutes the gear train 82 of the rack side plate 80 is shown. The spur gear 94 is configured by disposing a substantially cylindrical sleeve 114 at the shaft center portion of the gear portion 112 at the peripheral portion. The sleeve 114 has a simple shape in which a substantially rectangular flange 116 is provided at one end in the axial direction, and the same ultra-high molecular weight polyethylene as that of the sleeve 110 described above is molded. Further, as the material of the gear portion 112, the above-mentioned bearing 90 and nylon 12 which is easy to perform precision molding are used as an example. These are molded separately.

The spur gear 94 is assembled by inserting the sleeve 114 into the shaft center portion of the gear portion 112, and at this time, the rectangular flange 116 of the sleeve 114 is fitted in the center of the gear portion 116, so that the mutual mutual engagement. Restrict movement in the direction of rotation. The joint with the sleeve 114 inserted in the shaft center portion of the gear portion 112 is tightly joined by general resin joining such as ultrasonic welding. The shaft 118, the roller 44,
The rotating shafts 44A, 46A, etc. of 46 are made of stainless steel in consideration of the corrosion resistance of the processing liquid.

The spur gear 94 has a shaft 118 attached to a predetermined position of the rack side plate 80 and a sleeve 114.
And is attached by being secured by a not-shown E-ring or the like.

The roller pairs 32, 64, 66 arranged on the transport rack 42 are also rotatably supported by the rack side plate 80 by bearings 90 like the roller pair 36, and the other gears of the gear train 82 are also flat. The drive shaft 84 is rotatably supported by the rack side plate 80 via a sleeve 114 and has a structure similar to that of the gear 94 (all are not shown).
It is designed to rotate by being transmitted with driving force from.
Further, also in the transport racks 38 and 40, the gear train and the roller pair are attached in substantially the same manner, and the drive shaft 8
It is designed to be rotated by the driving force from 4.

As shown in FIG. 1, the drying section 68 includes:
A plurality of opposed roller pairs 72 are arranged at equal intervals. A guide plate 74 that guides the film 12 is provided between the pair of opposed rollers 72 that are adjacent to each other in the transport direction, and the film 12 is reliably guided to the next pair of opposed rollers 72. Here, the guide plate 74 is integrally formed with the chamber 76 to which the dry air generated by the drying fan and the heater of the dry air generating means (not shown) is supplied. A slit hole 76A is provided on the mounting surface of the guide plate 74 of the chamber 76 along the film width direction, and a dry air is blown toward the film 12 from between the pair of opposed rollers 72.

As a result, the film 12 is dried while being nipped and conveyed by the pair of opposed rollers 72, and reaches the discharge port 78. The rotating shafts of the rollers of the opposed roller pair 72 arranged in the drying unit 68 are also rotatably supported by being inserted into the bearings 90 (not shown), and the driving force of the drive shaft 84 is transmitted via a gear not shown. Are transmitted.

The operation of this embodiment will be described below. The film 20 on which an image is recorded by exposure is inserted into the automatic developing device 10 through the insertion port 48 of the automatic developing device 10 and processed. In the automatic developing device 10, the film 12 inserted from the insertion port 48 is transferred to the transport rack 38 of the developing section 18.
The developing tank 1 is pulled in by the roller pair 50 provided in the developing tank 1.
Send to 6.

In the developing tank 16, the roller pair 32, 34, 36 of the transport rack 38 is used to carry out a developing process by immersing it in a developing solution while transporting it in a substantially U shape. The film 12 that has been processed by the developing unit 18 is sent to the fixing tank 20.
In the fixing tank 20, the roller pairs 32, 3 of the transport rack 40
The film 12 is conveyed while being guided in a substantially U-shape by means of Nos. Fixing tank 2
The film 12 that has been processed at 0 passes through the rinse section 26. When passing through the rinse portion 26, the roller pair 58
By being sandwiched between the film 12 and the fixing solution, the fixing solution is washed off by the rinse solution drawn up by the lower roller on the surface of the film 12, and the film 12 reaches the washing section 30.

In the rinsing tank 28 of the rinsing section 30, the film 12 is conveyed while being immersed in rinsing water by the conveying rollers 32 and 36 of the conveying rack 42, and the film 12 is washed with water, and the fixing solution components are transferred from the surface of the film 12. To remove. The film 12 that has been washed with water is squeezed before reaching the drying section 68 from the washing section 30, and is brought into a horizontal state. The horizontal state is maintained and the film 12 is sent out.

In the drying section 68, first, the pair of opposed rollers 72
The film 12 is held horizontally and guided by the guide plate 74, so that the film 12 is conveyed horizontally. At this time, the front and back surfaces of the film 12 are dried by the drying air blown from the slit holes 76A provided in the chamber 76, discharged from the discharge port 78, and stocked in a receiving box (not shown).

Here, in the automatic developing device 10, the film 1
In accordance with the treatment of No. 2, the components in the treatment liquid or the film 12
A precipitate of the product is formed by the treatment of. This precipitate also adheres to sliding parts such as gears and rotating shafts in the treatment liquid.

In the transport rack 42 of the washing tank 28,
For example, between the spur gear 94 of the gear train 82 and the shaft 118,
The bearing 90 and the rotating shafts 44A and 46A of the rollers 44 and 46 slide while sandwiching this precipitate. At this time, since the shaft 118 and the rotating shafts 44A and 46A are made of stainless steel, they are not polished by the precipitate. Further, since the shaft 118, the sleeve 114 of the spur gear 94 that slides on the rotary shafts 44A and 46A, and the sleeve 110 of the bearing 90 are made of a resin having high wear resistance, the inner surfaces of the sleeves 110 and 114, respectively. Is prevented from being abraded by the precipitate.

Therefore, it is possible to prevent the gap between the sleeve 110 of the bearing 90 and the rotating shafts 44A and 46A of the rollers 44 and 46 from increasing and the rattling between the rollers 44 and 46 and the bearing 90 to occur. be able to. In addition, since the inner peripheral surface of the sleeve 110 is not roughened by the deposited deposit, the load torque does not change or the load torque does not increase. In addition, the sleeve 1 of the spur gear 94
Also in 14, the sleeve 1 sliding on the shaft 118
It is possible to prevent the inner circumferential surface of 14 from being roughened by the precipitate and being worn or worn to increase the gap.

In this way, the shaft 118 and the roller 4 are
Spur gear 94 that slides on rotating shafts 44A, 46A of 4, 46
Since it is possible to prevent the sliding surfaces of the sleeve 114 of the bearing 90 and the sleeve 110 of the bearing 90 from being roughened or abraded, it is possible to prevent the load torque of the transport rack 42 from changing or the load torque from increasing. The transport speed of 12 does not have speed unevenness. by this,
There is no unevenness in the transport of the film 12 transported in the washing tank 28 by the transport rack 42.

In the automatic developing device 10, since the developing tank 16 and the fixing tank 20 are also provided with the sleeves 110 and 114 made of abrasion resistant resin at the sliding portions of the gears and bearings,
Even in the developing tank 16, the fixing tank 20, and the rinsing tank 24, the uneven transport of the film 12 does not occur, and the film 12
It is possible to prevent unevenness in processing caused by unevenness in conveyance that occurs during development, fixing, and washing with water, and the film 12 can be processed so as to be finished with uniform quality.

Bearing 90 used in the automatic developing device 10
Has a complicated structure in which the flange portion 102 and the boss portion 104 are formed in advance so as to be easily attached to the rack side plate. Further, the spur gears 94 and the like which form the gear train 82 and the like need to be precisely manufactured so that each roller pair rotates at substantially the same peripheral speed. However, resins with high abrasion resistance such as ultra-high molecular weight polyethylene are generally difficult to process with complicated structures and precision.

Here, the bearing 90, the spur gear 94, etc. applied to the automatic developing apparatus 10 are made of nylon 12 or the like, which is easily processed at a low cost, in a portion which requires complicated processing or requires precise processing. And the sleeves 110 and 114 made of a resin having high abrasion resistance are molded into a simple cylindrical shape.

Since the bearing 90 is formed by so-called double molding in which the sleeve 110 is inserted, a strong connection can be established between the sleeve 110 and the bearing 90. The gear 94 and the like are gear parts 1 formed by resin molding
A sleeve 114 may be inserted into 12 and welded or the like. Also in this case, it is necessary to devise a rotation stopper as illustrated in FIG. 4 between them. With these configurations, even a component having a complicated structure can be processed very easily, and the component cost can be suppressed. Also,
Since the abrasion of the sliding portion can be suppressed, it is not necessary to frequently perform maintenance such as component replacement, and the running cost of the device can be reduced.

[Second Embodiment] A second embodiment of the present invention will be described below. The second embodiment has the same basic configuration as that of the first embodiment, and detailed description thereof is omitted.

In the second embodiment, molybdenum disulfide is added to the ultrahigh molecular weight polyethylene used for the sleeve 114 such as the spur gear 94 attached to the rack side plate 80 and the sleeve 110 of the bearing 90 for molding. This molybdenum disulfide has excellent lubricity when used in sliding parts,
This smoothes the surfaces of the sleeves 110 and 114.

FIGS. 6A to 6C respectively show
Bearings 90 in the developing tank 16, the fixing tank 20, and the washing tank 28
The experimental results of measuring the amount of wear of the sleeve 110, which is the sliding portion of the film 12, with respect to the processing time of the film 12 are shown, and in each graph, the bearing 90 (sleeve 90 in Example 2 in which molybdenum disulfide was added to ultra-high molecular weight polyethylene) 1
The change in the amount of wear in 10) is shown by a solid line, and the bearing 90 (sleeve 11
The wear amount of 0) is shown by a broken line.

As shown in FIG. 6A, in the bearing 90 arranged in the developing solution in the developing tank 16, the processing time of the film 12 is about 5 when molybdenum disulfide is not added.
When it exceeds 00 hours, the amount of wear increases rapidly. On the other hand, by adding molybdenum disulfide,
Even after the lapse of 00 hours, the wear amount of the bearing 90 is extremely small.

In the developing solution, the silver halide forming the photosensitive layer of the film 12 is eluted into the developing solution and precipitates. When the precipitated silver halide or the like adheres to the surface of the sliding portion, the inner surface of the sleeve 110 of the bearing 90 and the rollers 44, 4 and 4.
6 acts as an abrasive between the rotating shafts 44A and 46A of the No. 6 and tries to wear the inner peripheral surface of the sleeve 110. At this time, since molybdenum disulfide is added to the sleeve 110, the hardness is increased and the surface is smoothed only for ultra-high molecular weight polyethylene, and the surface is resistant to wear due to precipitates.

As shown in FIG. 6B, in the fixing solution, the amount of wear is small regardless of the addition of molybdenum disulfide. This is because no precipitation of a substance acting as an abrasive is found in the fixer.

As shown in FIG. 6 (C), in the wash water, the bearing 90 to which molybdenum disulfide was added showed little change in the amount of wear, but when molybdenum disulfide was not added, a long time (Example (2, about 750 hours),
The amount of wear increases rapidly. This is because aluminum ions contained in the fixer react with washing water to produce aluminum hydroxide. This aluminum hydroxide gradually precipitates and the sleeve 110 of the bearing 90 and the rotating shaft 44
The reason is that the sleeve 110 of the bearing 90 is abraded by adhering between A and 46A and rotating the roller pair 36 and the like.

As described above, molybdenum disulfide is added even if the silver halide or the like in the developing solution or the precipitate such as aluminum hydroxide produced in the washing water adheres to the sleeve 110 of the bearing 90. As a result, wear of the sleeve 110 can be prevented, and rattling at the time of driving each roller of the transport rack 42 can be suppressed. As a result, the change in load torque for driving each roller pair is small,
Further, since the surface of the sleeve 110 can be made smooth, uneven transport of the film 12 does not occur. The molybdenum disulfide may be added not only to the sleeve 110 of the bearing 90 but also to the sleeve 114 of the gear 94 or the like.

Further, in the first and second embodiments, the example in which the abrasion-resistant resin is used for the sliding portion of the transfer rack 42 of the washing tank 28 has been described. By using the gear and the bearing 90 that use the sleeves 110 and 114 molded of resin, it is possible to prevent unevenness in drying of the film 12 in the drying section 68 due to unevenness of conveyance.

The sleeve 110 of the bearing 90 and the sleeve 114 of the spur gear 94 applied to the present embodiment do not limit the shapes of the members that rotate relative to each other and the sliding portions thereof to which the present invention is applied. The present invention can be applied to a bearing or the like that supports the shaft 84, and the shape of the relative rotating member to which the present invention is applied may be another shape.

Further, although the present embodiment is applied to the automatic developing device 10 which is a photosensitive material processing device for processing the film 12 as a photosensitive material, it is applied to a photosensitive material processing device for processing other photosensitive materials such as printing paper. Is possible. In particular, by using a material having excellent processing liquid resistance and abrasion resistance, the photosensitive material can be processed smoothly for a long time.
In addition, since it is possible to perform simple molding using low-cost materials to manufacture parts with complicated structures,
The cost of parts can be reduced, and the assembly of the device is easy, so that the product cost can be reduced.

[0067]

As described above, in the sliding part structure of the photosensitive material processing apparatus of the present invention, since the abrasion resistant resin is used for the sliding parts of the bearings and gears, precipitation in the processing liquid is caused. Abrasion due to sliding with an object attached is suppressed, and uneven conveyance of the photosensitive material does not occur. In addition, since the abrasion-resistant resin has a simple sleeve-like shape, it has an excellent effect that molding can be performed very easily.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an automatic developing device applied to this embodiment.

FIG. 2 is a sectional view of a main part of a transfer rack.

FIG. 3 is a perspective view of a main part showing a bearing.

FIG. 4 is a perspective view of an essential part showing an idle gear.

5A is a sectional view of a main part taken along line 5A-5A of FIG. 3, and FIG. 5B is a sectional view of a main part taken along line 5B-5B of FIG.

6A to 6C are graphs showing changes in the amount of wear of the sliding portion of the bearing with respect to the driving time of the roller, and FIG. 6A is the amount of wear of the sliding portion of the bearing in the developer. Shows,
(B) shows the amount of wear of the sliding part of the bearing in the fixer,
(C) shows the amount of wear of the sliding portion of the bearing in the wash water after the fixing process.

[Explanation of symbols]

 10 Automatic Developing Device (Photosensitive Material Processing Device) 12 Film (Photosensitive Material) 16 Developing Tank 20 Fixing Tank 28 Washing Tank 38, 40, 42 Conveying Rack 36 Roller Pair 44, 46 Rollers 44A, 46A Rotating Shaft 82 Gear Train 90 bearing 94 spur gear 110, 114 sleeve 118 shaft

Claims (4)

[Claims] 1. A wear-resisting member in which a sliding portion of a member which slides and relatively rotates with respect to a shaft of a driving device for conveying a photosensitive material is supported by a photographic processing liquid-resistant resin molded product. A sliding part structure of a photosensitive material processing apparatus, which is formed of a wear-resistant resin member. 2. The sliding part structure of the photosensitive material processing apparatus according to claim 1, wherein the abrasion resistant resin member is one to which molybdenum disulfide is added. 3. The sliding portion of the photosensitive material processing apparatus according to claim 1, wherein the relative rotation member is formed by joining the abrasion resistant resin member to the resin molded product. Construction. 4. The sliding portion of the photosensitive material processing apparatus according to claim 1, wherein the relative rotation member is formed by insert molding the abrasion resistant resin member on the resin molded product. Construction.