JP2001022047A - Device for conveying negative sheet and photographic processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with the frequent cleaning of the surfaces of a driving roller and a follower roller by a worker and to prevent the meandering of a body to be conveyed by subjecting the surface of at least the driving roller to high friction treatment. SOLUTION: The peripheral part of a driving roller 3b contains SiC particles as hard particles 3d having 20-100 μm diameter in a matrix 3c comprising chloroprene rubber. When a negative sheet is conveyed while holding between the driving roller 3b and a follower roller 3a as a pair of conveying rollers 3, the SiC particles 3d bite moderately into the surface of the negative sheet to attain a high coefficient of friction and the negative sheet is reliably conveyed without causing slip. High friction treatment is preferably carried out at a relatively low cost by the coating of the surface of a metallic roller with a high friction layer or the roughening of the surface of a metallic roller besides the embedding of hard particles into a rubber roller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a negative sheet transport apparatus and a photographic processing apparatus, and more particularly, to a negative sheet transport apparatus for efficiently transporting a negative sheet into which a photosensitive material such as a photographic film can be inserted, and a photographic processing apparatus having the same. Related to the device.

[0002]

2. Description of the Related Art In a photographic processing apparatus that automatically and consistently processes a film image from film development to printing and drying of the film image on photographic paper, a film that has been developed is disposed in an exposure device and a film image is printed on the photographic paper. The film, which has been baked and further baked, is inserted into a negative sheet, and the film inserted in the negative sheet is delivered to a customer together with the photographic paper on which printing has been completed.

[0003] Then, the negative film (or positive film), which has been printed, is cut into a predetermined length and automatically stored in a transported negative sheet. In this case, the negative sheet is wound in a roll shape, and is transported to the insertion position of the cut negative film in a timely manner while rewinding the negative sheet. However, the surface is particularly slippery. When the negative sheet is conveyed and slips in the middle of the conveyance, the timing of a series of steps for inserting the negative piece cut into a predetermined length into the negative sheet is shifted, which hinders the flow of the processing operation. Cause trouble. For this reason, one of the rubber rollers (for example, NBR rollers) which has relatively large frictional resistance and is easy to handle is used as a driving roller while the other is used as a pressure roller (driven roller), and a negative sheet is sandwiched between the pair of rollers and conveyed. I have.

[0004]

However, at the beginning of use of the rubber roller, a relatively large frictional resistance is maintained, so that no slip phenomenon of the transferred object occurs. However, the rubber roller is installed in a minilab or the like which performs a large amount of processing. In such a photographic processing apparatus, as the frequency of use increases, dirt adheres to the surface of the rubber roller, so that the frictional resistance gradually decreases, and slip occurs during conveyance. for that reason,
It is indispensable for the worker to frequently clean the surface of the rubber roller, and it is necessary to stop the operation of the apparatus for each work, which is troublesome.

[0005] In order to eliminate such an operation, a method of increasing the pressing force of the rubber roller has been considered. However, if the pressing force is increased, the negative sheet will meander while being conveyed and cannot be adopted at all. Further, even when the rubber roller itself is worn, the frictional resistance of the surface is reduced. Therefore, there is a high demand for a roller having high wear resistance.

Accordingly, an object of the present invention is to eliminate the need for the operator to frequently clean the roll surface in view of the above-mentioned problems of the prior art, and to prevent the transferred object from meandering. An object of the present invention is to provide a transport device having high abrasion and a photographic processing device using the transport device.

[0007]

The above object is achieved by the invention described in each claim. That is, the characteristic configuration of the negative sheet conveying device according to the present invention is a negative sheet conveying device having a combination of a driving roller and a driven roller, wherein at least the surface of the driving roller among the driving roller and the driven roller has high friction processing. Is what is being done.

According to this structure, the transport force of the negative sheet is improved, and the negative sheet can be transported reliably by the normal roller pressing force, so that the operator does not need to frequently clean the roll surface. A negative sheet conveying device having high abrasion resistance and no meandering can be provided. Of course, the surface of the driven roller may be subjected to a high friction treatment.

It is preferable that the high friction treatment is one of embedding hard particles in a rubber roller, coating a high friction layer on a metal roller surface, and processing the metal roller surface into an uneven shape.

According to this configuration, the surface of the roller can be subjected to a high friction treatment at a relatively low cost, which is convenient. In particular, when hard particles are embedded in a rubber roller, an extremely high abrasion-resistant surface can be formed by mixing hard particles with a soft rubber. Even if the hard particles on the outermost surface are peeled off as the process proceeds, the inner hard particles will appear on the outermost surface, so that the high wear coefficient can be maintained for a long time, which is convenient.

The hard particles embedded in the rubber roller are 2
It is preferable that the particles have a diameter of 0 to 100 μm.

According to this configuration, the roll surface having a high friction coefficient can be more reliably maintained for many months, which is convenient. If the particle size is less than 20 μm, the effect of increasing the coefficient of friction is not remarkable, and if it exceeds 100 μm, the surface of the negative sheet may be damaged, which is not preferable.

Further, a characteristic configuration of the photographic processing apparatus according to the present invention is that the photographic processing apparatus includes the negative sheet conveying apparatus according to any one of claims 1 to 3.

According to this structure, the operator does not need to frequently clean the roll surface, so that the maintenance work is easy and easy to use, yet the conveyed object does not meander, and wear resistance is reduced. Thus, a photographic processing apparatus using a highly transportable device could be provided.

[0015]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a side structure in a photographic processing apparatus of the present embodiment, particularly a side structure viewed from a photographic film (hereinafter simply referred to as “film”) cutting apparatus side, FIG. 2 shows a plane structure, and FIG. 3 shows a negative sheet. 2 shows a partial front structure near a transport roller. This portion of the film cutting device is usually disposed and used adjacent to a processor (not shown) for printing a developed film image on a photographic paper and producing a silver halide print. This film cutting device
A cutter section C for cutting a long film F into negative pieces P of usually 6 or 4 frames, and a cutter section C
And an enveloper section E for inserting the negative piece P cut in the negative sheet 1 having a large number of pockets.

The cutter section C includes a colorless and transparent viewer plate 5 arranged substantially horizontally to support a long film F, a cutter 6 for cutting the film F on the viewer plate 5, and the like. The cutter 6 is manually operated via a swingable negative cut lever 9 with respect to the lower blade 7 and the lower blade 7 disposed on the upstream side of the downstream end of the viewer plate 5 with the cutting line 8 interposed therebetween. Operated. In other words, the long film F is cut into the negative pieces P by swinging operation by manual operation of pushing the negative cut lever 9 downward from the home position. And the boundary line between the lower blade 7 and the upper blade 10,
The downstream end of the viewer plate 5 coincides with the cutting line 8.

A through-hole area is formed downstream of the viewer plate 5, and film feed rollers 11 and 12 for transporting the film P are attached thereto. The film feed rollers 11 and 12 have rubber outer peripheral portions, and the outer peripheral portions can be brought into close contact with the film P mounted on the upper surface 5a of the viewer plate 5 and fed. And one of the film feed rollers 11, 12 is
It is driven by a motor (not shown) (the other is driven).

In order to cut the film F into negative pieces P, an operator swings the negative cut lever 9 downward from the home position to cut the film F into negative pieces P, and then moves the negative cut lever 9 to the home position. When an operation of pushing upward from above is performed, a signal is emitted from a sensor (not shown) that detects that the lever is located above the negative cut lever 9. On the basis of this signal, a motor acting on one of the film feed rollers 11 and 12 is operated, and the rotation of the film feed rollers 11 and 12 causes the negative piece P sandwiched between the film feed rollers 11 and 12 to become an envelope. The sheet is fed and inserted into the negative pocket of the negative sheet 1 arranged at E. The driving of the motor by the signal detected by the sensor is instructed by a controller (not shown).

When the remaining length of the cut negative piece P becomes short, the negative piece P cannot be fed into the negative pocket of the negative sheet 1 only by the rotation operation of the film feed rollers 11 and 12, that is, when the negative line P is cut more than the cutting line 8. When the rear end of the film F remains on the upstream side, an inserter device 13 including a parallel link mechanism is provided to feed and insert the rear end into the negative pocket of the negative sheet 1. As shown in FIG. 3, the inserter device 13 includes two link members 13a and 13b, and is at a standby position below the upper surface 5a of the viewer plate 5 (FIG. 3A).
And a pushing piece 14 that can reciprocate between this position and an operation posture (FIG. 3B) located downstream of the film F in the supply direction. The pushing piece 14 is normally in a standby position by the action of its own weight or an urging spring (not shown), and is switched to the above-mentioned operating position by manually moving the handle 15 in the direction of arrow A. When the pushing piece 14 is switched from the standby posture to the working posture, the downstream end of the pushing piece 14 protrudes upward from a through hole formed in the upper surface 5a of the viewer plate 5, and the film F is placed in the negative pocket of the negative sheet 1. It is designed to be pushed into. The handle 15 is swingably supported around the axis X. When the handle 15 is moved in the direction A, the operation pin 16a of the disc-shaped member 16 fixed to the root of the handle 15 connects the link member 13b. 3, the pushing piece 14 is switched to the working posture.

A film F covers the upper surface 5a of the viewer plate 5.
The central portion may be sent to the cutting position in a swelled state (curled state). However, such a shape makes it difficult to insert the cut negative piece P into the negative pocket of the negative sheet 1. Therefore, as shown in FIG. 2, it is preferable that the pressing roller 17 made of stainless steel is disposed immediately above the film F. By arranging the pressing roller 17 in this way, the shape of the film F can be corrected to be flat, and the cut negative piece P also has a flat posture, and the negative piece P
Can be reliably inserted into the negative pocket of the negative sheet 1.

On the other hand, the negative sheet 1 is wound in a roll around a negative sheet stocker 2 inside the apparatus, and when used, is sandwiched between a pair of upper and lower negative sheet conveying rollers 3 constituting a negative sheet conveying apparatus. The viewer plate 5 is sequentially lifted upward and arranged at a position downstream of the upper surface 5a of the viewer plate 5. Negative pieces P cut to a predetermined length are sequentially inserted into a large number of negative pockets provided in the pulled-up negative sheet 1. In that case, as shown in FIGS. 2 and 3, a receiving member 18 is attached to widen the negative piece insertion opening in the negative pocket of the pulled-out negative sheet 1. When the negative pieces P for one order (one film unit: 12, 24, 36 frames, etc.) have been inserted,
The insertion of the negative piece P into the negative pocket is stopped, and the negative sheet 1 is advanced by one step of the negative pocket. Then, after the negative sheet 1 is cut by the rotary cutter 4 showing only the cover portion in FIG. It should be noted that FIG.
Reference numeral 0 denotes an operation lever for manually operating the rotary cutter 4.

Next, the transport roller 3 will be described. The transport roller 3 includes a driven roller 3a for pressing, which presses the negative sheet 1, which is an object to be held, by its own weight and a driving roller 3b positioned below.
b is connected to a motor (not shown). Each of the pair of conveying rollers 3a and 3b has a structure in which a metal shaft has an outer peripheral portion made of rubber. As shown in FIG. 4, the outer peripheral portion of the driving roller 3b is made of chloroprene rubber. The substrate 3c is made of SiC (silicon carbide) particles as hard particles 3d having a diameter of 20 to 100 μm. When the negative sheet 1 is transported while being sandwiched between the pair of transport rollers 3, the SiC particles 3 d appropriately bite into the surface of the negative sheet 1, which realizes a high coefficient of friction and reliably transports the negative sheet 1 without causing slippage. Will do. Since the SiC particles 3d are three-dimensionally dispersed inside the chloroprene rubber serving as the matrix 3c,
Even if the chloroprene rubber roller of the base 3c wears out and the SiC particles 3d dispersed on the surface of the base 3c come off as the use progresses, the SiC particles 3d dispersed inside may be lost. Appearing on the outermost surface, which means that the surface of the roller has been subjected to a high friction treatment, the surface of the roller can be maintained at a high wear coefficient.

As the base rubber constituting the outer peripheral portion of the transport roller 3, besides the above-mentioned chloroprene rubber, EPD
A wide variety of thermoplastic elastomers such as M, NBR, silicone rubber, urethane rubber and the like can be used. Further, as the driven roller 3a, a roller made of only a metal rod-shaped material such as stainless steel (SUS304 or the like) can be used instead of using a rubber roller for the outer peripheral portion.

Alternative Embodiment (1) In the above embodiment, an example was shown in which SiC was used as the ceramic particles embedded in the rubber roller as the outer peripheral portion, but the present invention is not limited to this. , Al
Various hard particles such as ₂ O ₃ , Si ₃ N ₄ and BN can be employed. Further, the tip of hard particles embedded in the rubber roller may be polished and used.

(2) The high-friction treatment applied to the surface of the drive roller is performed by embedding ceramic particles on the surface of the rubber roller, and in addition to Al ₂ O ₃ , S
iO ₂ , SiC, Al, Mg, Zn, etc. may be vacuum deposited. In this case, fine irregularities may be formed in advance on the surface of the metal serving as the base.

(3) As the high friction treatment to be performed on the surface of the drive roller, minute irregularities may be formed on the surface of the metal roller by machining, for example, into a flat-grained pattern. In this case, although it depends on the size of the pattern, it is desirable that the peaks of the uneven shape are processed so as not to be sharp.

[Brief description of the drawings]

FIG. 1 is a side view of a photographic processing apparatus according to the present invention.

FIG. 2 is a plan view of a photographic processing apparatus according to the present invention.

FIG. 3 is a cutaway front view of a main part of the photographic processing apparatus according to the present invention.

FIG. 4 is a partially enlarged perspective view of the negative sheet conveying device.

[Explanation of symbols]

 3a driven roller 3b drive roller 3c rubber roller 3d hard particles

Claims (4)

[Claims] 1. A negative sheet conveying device having a combination of a driving roller and a driven roller, wherein at least a surface of the driving roller among the driving roller and the driven roller is subjected to high friction processing. 2. The method according to claim 1, wherein the high-friction treatment is performed by embedding hard particles in a rubber roller, coating the surface of the metal roller with a high-friction layer, or processing the surface of the metal roller into an uneven shape. Negative sheet transport device. 3. The hard particles embedded in the rubber roller,
3. The negative sheet conveying device according to claim 2, wherein the particles are particles having a diameter of 20 to 100 [mu] m. 4. A photographic processing apparatus provided with the negative sheet conveying apparatus according to claim 1.