JP2000098570A - Driving device and carrying device for photographic material, and photographic developing machine using the aforesaid devices - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device and a carrying device which are prevented from wearing away, whose speed fluctuation is suppressed, and capable of carefully dealing with photographic material to be carried, and to provide a photographic developing machine using the aforesaid devices. SOLUTION: This is a material driving device for carrying the photographic material along a carrying path, especially, for carrying the photographic material passing through the photographic developing machine, and the device is provided with a diving rotor 100, and by bringing the rotating surface 110 of the rotor into contact with the photographic material, the driving force is transmitted to the photographic material so as to carry the material. The circumferential speed of the rotating surface is made higher than the photographic material carrying speed at the contact point. The photographic material carrying device includes a conveyer device for feeding/removing the photographic material carried by the driving device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a photographic material driving device for feeding photographic material along a conveying path, a photographic material conveying device provided with the above driving device according to the present invention, and a photographic material conveying device according to the present invention. The present invention relates to a photographic developing device having the same.

[0002]

BACKGROUND OF THE INVENTION Conventional photographic material drives generally engage a perforation for transport of the photographic material or, based on the principle of contact friction, contact between a roller and the photographic material. The photographic material is conveyed while maintaining the image quality. The means of slowing or accelerating the photographic material with respect to the drive when the feed material changes, exerts a strong force on the photographic material, which may be damaged or even torn.

[0003] In particular, large load changes occur during the transport of photographic material through a photographic processor, especially in the wet area, and are also caused by the relatively large transport distance of the photographic material. In the case of the present invention, the photographic material is usually photographic paper, but generally, in the present invention, not only photographic paper but also other photographic materials such as films (positive and negative films), Film development,
Or, it relates to the conveyance of a film presentation or the like. The transported photographic material, especially in web form,
Here, it is referred to as a photographic material web.

In a photographic processor, photographic material is guided on a series of rolls along a path that guides it and passes through a wet area and a dryer.

When one driving device is provided at the exit of the photographic developing machine, a conveying device such as a drawer or a winding device for drawing the photographic material through the photographic developing machine exerts a large force for conveyance. I need. At this time, the photographic material will be broken. For this reason, the rollers for guiding photographic material in a photographic developing machine are not only configured as passive driven rollers, but also as active drive rollers.

However, in the prior art, a reduction in the feed speed of the photographic material relative to the drive rollers occurs between the individual drive rollers, which results in breakage or damage of the photographic material.

[0007] For the above reasons, so-called "demand" drives or drive rollers are also conventionally provided and operate when the photographic material is fed too late and at a reduced speed when fed too fast. Counter medium speed fluctuations. A "demand" drive is generally realized by a spring-biased roller body, which comprises inner and outer roller bodies between spring elements. When one rotor body rotates relative to the other during deceleration or advancement before the photographic material comes into frictional contact with the outer roller body, a spring element brings the inner and outer roller bodies into contact to form a two roller body. An elastic force is applied between them.

The spring-loaded double rotor body is
It is driven by a permanently drivingly connected shaft, together with a so-called leader band. This leader band is used to feed a photographic material web into a photographic processor. Due to the drive connection between the spring-biased double roller body and the leader band and the frictional contact between the outer roller body and the photographic material web, the photographic material web is transported at a preselected transport speed independent of speed fluctuations. You.

As the photographic material web decelerates relative to the outer roller body, the spring element moves from a rest position (spring extended or compressed) and the photographic material web returns to the preselected transport speed. Until this occurs, a stronger driving force acts on the photographic material web. When the photographic material web exceeds the transport speed, the outer roller body slows down the photographic material web by the action of a spring element.

The load changes described above occur continuously, so that the thrust forces act on the constantly spring-loaded double roller body or demand drive. This increases the wear rate and requires the replacement of the double roller body with considerable frequency. In addition, this replacement causes the replaced roller body to have a variation correction effect on the thrust force different from that of the new roller body, and as a result, a new adjustment of the entire photographic material conveying process, for example, further demand-driven operation It has the disadvantage of requiring actuation and increase or decrease. And, as undesirable resonances are formed between the individual demand drives, the required adjustment of the photographic developer is very time consuming until the optimal running operation of the photographic developer is guaranteed, and A lot of experience is required.

[0011]

SUMMARY OF THE INVENTION In view of such circumstances, the present invention eliminates wear and suppresses the occurrence of speed fluctuations.
It is an object of the present invention to provide a novel driving device that carefully handles conveyed photographic materials. It is a further object of the present invention to provide a corresponding photographic material transport device and a photographic developer equipped with such a drive.

[0012]

To this end, the present invention comprises preferred embodiments as set forth in claims 1, 8, 11 and the accompanying claims.

The drive according to the invention serves to transport photographic material, in particular photographic material or film, along a transport path formed in a photographic developing machine. The transport path includes, for example, several drive rollers, driven rollers, and guides for photographic material. The transport path is guided to, for example, a wet area and a dry area of a photographic developing machine. For the drive of photographic material, the drive comprises a rotationally symmetric body rotating about its axis, which is called a drive rotor. The rotating surface of the drive rotor (the so-called drive surface, or contact surface) comes into contact with the photographic material, so that the contact exerts a driving force on the photographic material and keeps the transport speed of the photographic material constant or constant. I do.

According to the present invention, contact occurs when the relative speed between the photographic material and the surface of the drive rotor is non-zero. Contact between the photographic material and the drive rotor can be made, for example, magnetically, electrostatically, or by mechanical properties. When the drive is used in a photographic developer, the contact preferably utilizes mechanical properties.

If the contact is due to mechanical properties, a sliding frictional force is generated between the drive rotor and the photographic material, transmitting the drive force from the drive rotor to the photographic material. Therefore, the peripheral speed of the surface of the drive rotor becomes faster than the conveying speed of the photographic material, and the contact friction force does not act.

Preferably, the peripheral speed of the rotating surface of the drive rotor is constantly maintained, at least almost always, at or above the transport speed of the photographic material, so that sticky contact between the photographic material and the rotating surface is avoided. it can.

The inventor has determined that during testing, a slightly higher speed of the rotating surface is sufficient (eg, faster than 1%), while the drive is activated when the speed is very high. . Preferably, the peripheral speed of the drive rotor is selected to be equal to or higher than the actually used transport speed, so that a change in the transport speed within an actually used range that does not match the peripheral speed of the drive rotor is required. If the peripheral speed of the drive rotor or drive rotors is equal to the transport speed, the photographic material will adhere and be damaged on the rollers, since a frictional contact force will be created.

Contrary to the prior art (spring-biased double roller bodies), the individual drive rotors are each driven by a separate driver, if desired, such that the individual peripheral speeds exceed the transport speed. can do. When several drive rotors are provided, they need to rotate faster than the transport speed, but not all drive rotors need to have the same speed.

This eliminates the need for costly mechanisms to connect all drive motors together to ensure equal drive speed. Conversely, all dual rotor bodies in the prior art were connected by a leader band to maintain equal rotational speeds. This is the case with the device according to the invention, but is not necessary, unlike the prior art.

In practical use, it has been practiced to operate the photographic material more quietly along the transport path and to operate at a lower speed than the speed fluctuations encountered in the prior art. Therefore, in the new and complete driving principle, the double roller body with spring element
It is not absolutely necessary for the present invention. Thus, even if the transport speed of the photographic material web fluctuates, according to the present invention, the peripheral speed of the rotating surface is preferably kept at least constant. As with the double roller body, no compensating action due to variations in peripheral speed is required according to the present invention. According to the invention, the construction of the drive rotor can be simplified, the rotor can be made rigid and made of solid material, and a longer service life can be guaranteed than in the case of conventional double roller bodies.

In the prior art, the drive roller has a ball shape or a rotationally symmetrical torso shape with a bulged middle portion to achieve centering of the material. According to the present invention, a ball shape is not required. The drive surface in contact with the photographic material may have different shapes. For example,
It may be ball-shaped or conically thick or thin on the outside, but preferably cylindrical.

The present inventor has stated that in the cylindrical configuration according to the present invention,
It has been found that a central force is created to hold the photographic material web in a preselected position. To assure this centering, the cylindrical drive surface is preferably wider than the photographic material web, so that if the photographic material web is angularly displaced or displaced relative to the drive rotor, e.g. In the event of confusion, the contact between the photographic material web and the drive rotor is maintained until the photographic material web eventually returns to its original position due to the contact and the resulting force.

To avoid the danger of sticky contact,
Alternatively, the drive contact surface is preferably made as small as possible in order to keep the part of the sticky contact against the sliding or frictional contact as small as possible. Making this as small as possible means that the engagement surface will be much smaller, and the web of photographic material will have less than 50% of the potential engagement surface with the drive rotor during transport, especially , Preferably 10% or less.

In order to reduce the drive contact surface, a contact area is provided on the drive roller via a protrusion or groove on the surface of the drive rotor, whereby a contact surface is formed only on the protrusion and the groove Thus, no driving contact occurs. The groove has, for example, a circular or rectangular hole shape, but in principle any shape is possible. In particular, the protrusions can be arranged at a preselected distance.

The contact area is preferably constituted by a rib or a ring, and is rotationally symmetric about and extends around the axis of the drive rotor. Annular or web-shaped contact areas can be provided at predetermined intervals. further,
The contact area can be arranged to contact the photographic material web only at predetermined locations, for example, only in the edge areas. For example, it may be formed such that only the edge region or the contact region does not engage a region of the photographic material, for example, an image region. For film transport, the contact area is
For example, it can be placed only outside the film image, i.e. in the area of perforations to protect the film image.

The contact area is preferably smooth to avoid sticking or sticky friction as much as possible. Tests with photographic materials have shown that a material that provides a coefficient of friction, such as a smoother material than rubber or polypropylene or PVC, is preferred.

[0027] In addition to the drive rotor described above, the drive device according to the present invention preferably includes a plurality of guide rollers that rotate with the photographic material being conveyed, and the guide rollers themselves do not have a drive. desirable. The guide roller has a contact surface that produces sticky or viscous friction with the photographic material. The width of the contact surface is preferably smaller than the photographic material web, and the range of the contact surface width is 30-80 mm for photographic materials of 87 mm width or more.
Is desirably within the range. In this way, the inventor has found that the guide of the photographic material is achieved by adjusting the photographic material web itself during transport to extend both sides beyond the contact surface. The guide roller is preferably cylindrical, but can be, for example, ball-shaped or conically tapered or tapered.

Of course, the drive may be provided with an electronic control to control, adjust, and / or monitor with a sensor the rotational speed of the drive rotor. The transport speed can be adjusted and / or monitored using sensors via the controller. The control device can also compare the transport speed with the peripheral speed of the contact surface of the drive rotor, so that each drive rotor can travel faster than the transport speed.

According to the invention, the drive preferably uses a transporter of photographic material. The transport device includes a transport device for setting a transport speed for the photographic material. Thus, the photographic material is supplied to the driving device at a predetermined transport speed and is discharged. In this photographic material conveying device,
The photographic material is specifically supplied from a photographic material source and is conveyed by a drive device, and finally the photographic material to be conveyed is received in a receiving portion of the photographic material.

The photographic material is supplied via a photographic material dispensing device or a photographic material feeding device, these devices comprising:
It functions as a transport device and supplies photographic material to a drive at a preselected transport speed. Further, the photographic material is further conveyed to the outlet of the conveying passage at the above-mentioned conveying speed and extracted. Then, the photographic material is conveyed to an photographic material receiving unit via an outlet conveyance device (for example, a spacer) which also functions as a conveyance device. The photographic material source can be configured, for example, as an output of a photographic material reel or a photographic material transport path. The receiving portion for the photographic material can also be configured as a reel for winding up the photographic material or, for example, as a subsequent photographic material transport path for further photographic material.

The transport device sets the transport speed with respect to the increasing peripheral speed of the drive rotor according to the present invention. The photographic material distribution device conveys the photographic material at a preselected transport speed in contact with a first drive rotor of the drive, and the photographic material is preselected along the transport path by the drive rotor or guide rollers. It is transported at the transport speed. In a feeder, photographic material is withdrawn at a preselected transport speed along an initial transport portion or the entire transport path. Here, the peripheral speed of the drive rotor is faster than the transport speed.

In the prior art, a so-called leader band path is used for feeding. The path is a band running along the transport path, and at the time of feeding, the front end of the photographic material web is clamped by the leader band,
As a result, the leader band holds and guides the web of photographic material passing through the transport path. This withdrawal operation is supported by a drive rotor according to the present invention to prevent damage to the photographic material web.

According to the invention, the leader band drive is separated from the drive of the drive rotor, in particular in order to guarantee the desired speed difference. Have been disconnected. According to the invention, in particular compared to the prior art, after feeding in, there can be no continuous circulation of the leader band path. This leader band circulation is stopped and switched off. According to the present invention, the leader band can be further shortened.

As a result, the leader band becomes one first band.
Sufficient contact with the drive rotor (also referred to herein as a drive roller) is maintained and circulates with the plurality of first drive rollers. The photographic material web is further conveyed by a drive rotor and guide rollers, in particular a further drive rotor. A completely different feeding device can be provided, for example, which guides the front end of the photographic material web and provides airflow,
A vacuum and / or pressure can be applied to bring the photographic material web into contact with the first drive rotor or plurality of first drive rotors (eg, by blowing and / or suction).

A so-called spacer is commonly used as an output transport device, which is arranged in front of a take-up reel and draws a web of photographic material along a transport path at a preselected transport speed. After feeding, the photographic material web is preferably further fed for output transport to an output transport device, for example, a spacer.

According to the present invention, the transfer speed of the transfer device is:
For example, it can be changed by changing the consumption speed or feeding speed of the photographic material, or the transport speed of the output transport device. This makes it possible to keep the peripheral speed of the drive rotor faster than the transport speed.

According to the invention, the photographic material transport device is preferably used in a photographic developing machine for developing photographic materials.
Preferably, the guide roller is in contact with the leading edge of the photographic material or the side of the image image. On the other hand, the drive rotor is brought into contact with the back side of the photographic material in order to protect as much of the image side of the photographic material as possible. As mentioned above, alternatively or additionally, the contact area of the drive rotor is selected to contact the front side of the photographic material instead of the image area of the photographic material.

The drive according to the invention has a longer lifetime and is less likely to fail against the prior art. This drive is preferably used in all photographic processors, not only in the wet area, contrary to the prior art. Thereby, the photographic material can be transported to all the photographic material developing machines at a low pressure.

Further advantages and features of the present invention are disclosed in the embodiments described below with reference to the accompanying drawings. Also, features of different embodiments may be combined with one another.

[0040]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a total of nine annular peripheral ribs 11.
1 shows a drive rotor 100 according to the invention with zeros, the annular peripheral ribs forming a contact surface for the web of photographic material to be conveyed. This annular rib is preferably manufactured from a hollow rod, with the grooves between the ribs being machined. The drive shaft 120 indicated by the dashed line is
The driving motor 100 is driven so that the peripheral speed of 0 is faster than the conveying speed of the photographic material to be conveyed.

The ribs 110 shown in FIG. 1 preferably have a width in the range of mm and project from the remaining surface 112 of the drive motor in the range of mm, preferably about 1 mm wide and about 1 mm wide. It protrudes by 1 mm. The width of the drive rotor is preferably, for example, 12 cm or 16 cm longer than the width of the photographic material web.

FIG. 2 shows a wet developing machine, which comprises a supply section 210, an elevator 220, and a wet section 23.
0, including an end scraper and wet corrector 240, a feed module 270 with a compressor, a radiator module 260, a dry module 270, and an outlet module 280.

The leader band 300 indicated by a continuous line is:
It runs endlessly on rollers drawn in circles. The photographic material 400 is rewound from the rewind reel 410, travels in parallel with the leader band 300, and leaves the common path at the exit 14 and is taken up by the take-up reel 420. Between the take-up reel 420 and the outlet 14, there is a so-called spacer (not shown) for extracting the photographic material from the developing machine at a predetermined transport speed.

The driving device according to the present invention includes the input area 205
And a plurality of drive rotors and guide rollers, each indicated by a circle between the output region and the output region. The drive rotor is located below the photographic material web, and the guide rollers are located above the photographic material web. In this way, the drive rotor or roller contacts the back side of the photographic material and the guide roller contacts the front side of the photographic material.

The drive rotor is, for example, designated by reference numerals 1, 2,
The guide rollers are designated by reference numerals 5, 7, 11, and 13, for example, 3, 4, 6, 8, 12, and 14. This guide roller is described in detail in FIGS. 5 to 7, where the reference numbers are:
It is 600. The photographic material is drawn as a continuous thick line in front of the input area 205 or behind the output area 14. Areas where the photographic material runs parallel to the leader band are not shown for clarity.

In the drive roller in the input area 205, the leader band is connected to the front end of the photographic material via a clamp for feeding the photographic material web. In the exit area 14 behind the drive rollers and in front of the reel 420, the photographic material is unclamped as soon as the web of photographic material is gripped by the spacers not shown.

FIG. 3 shows a drive according to the prior art, which is arranged in the wet area of a photographic developer. A conventional spring-biased double roller body is shown at 1000 and is coupled to a drive shaft 1120 that drives a band roller 1200, which further drives a leader band 300. .
The inner roller of the double roller body 1000 is fixed to the drive shaft 1120. Therefore, double roller main body 1000 rotates at the same peripheral speed as leader band roller 1200. Reference numeral 1150 indicates the drive shaft 112.
2 shows the drive motor for the zero.

The container wall of the liquid tank in the wet area is:
This is indicated by reference numeral 1500. Also, the liquid level is indicated by reference numeral 1520. At the lower end in the container there is further provided a roller 1600, which can be fixed to the shaft 1620 and formed as a driven roller. The front end of the photographic material 400
It is connected to the leader band 300 by a clamp 420, which runs on the right roller 1600. All drive rollers are driven synchronously via a leader band. The photographic material web is guided on rollers 1600, 1000 on the left and right of the leader band path.

FIG. 4 shows one drive shaft 120 having a plurality of drive rollers 100 and a leader band roller 1200 arranged side by side. These drive rollers 100 are driven by the shaft 120, and one of the leader band rollers is not driven by the shaft 120. The leader band roller 1200 is connected to the drive shaft 120 via a slide bearing, and is configured so that the leader band roller 1200 rotates independently of the drive shaft. The drive shaft 120 drives the drive roller 100 at a predetermined speed, so that the peripheral speed of the drive roller 100 is higher than the peripheral speed of the leader band roller 1200, especially during feeding of the material. Since the leader band is not required for driving the drive roller, unlike the prior art, the circulation of the leader band can be stopped after the feeding in, contrary to the prior art. The bearing for the drive shaft is shown at 122 and the drive shaft is meshed at.

One drive roller 100 is disposed on each of the right and left sides of the leader band rotor 1200, so that the photographic material web can be fed by one leader band.

FIG. 5 shows a sectional structure of the guide roller 600. The contact surface 610 protrudes from the remaining surface 612 by a distance d, preferably in the range of a few mm, for example 1 mm. Contact surface 610 with fine hatching
Have rough surfaces that create viscous frictional contact with the photographic material. The contact surface is preferably considerably smaller than the width of the photographic material web,
To 80 mm. The guide roller 600
It cannot be driven by itself and can rotate freely about the axis 620 relative to the photographic material.

FIG. 6 shows another embodiment of the guide roller, in which the contact surface 610 is smaller than in the embodiment of FIG. FIG. 7 shows the guide roller 600 positioned on the axis 620. further,
Leader band roller 1200. It is arranged on axis 620 so as to rotate with the leader band. Guide rollers 600 are disposed on the right and left sides of the leader band roller, respectively.
Around with the photographic material web.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of a processing apparatus according to the present invention having a reel turntable having a three-reel configuration.

FIG. 2 is a schematic view showing a wet developing machine.

FIG. 3 is a diagram showing a driving device according to the prior art, which is arranged in a wet portion of a photographic developing machine.

FIG. 4 shows a shaft with a plurality of drive rotors according to FIG. 1 in which the leader band rollers are arranged in the middle and arranged side by side.

FIG. 5 is a cross-sectional view showing one embodiment of a guide roller.

FIG. 6 is a cross-sectional view illustrating another embodiment of the drive roller.

FIG. 7 is a diagram showing a plurality of guide rollers on one shaft.

[Explanation of symbols]

 14 Exit area 100 Drive rotor (drive roller) 110 Rib 120, 1120 Drive shaft 205 Input area 230 Wet section 300 Leader band 400 Photographic material 410 Rewind reel 420 Take-up reel 600 Guide roller 1000 Double roller body 1200 Leader band roller

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Detlef Schulz Leckies Germany 40882 Ratingen male Tostrasse 36

Claims (13)

[Claims] 1. A photographic material driving device for conveying a photographic material along a conveying path, and more particularly, for conveying a photographic material through a photographic developing machine and transmitting a driving force to the photographic material to convey the photographic material. At least one drive rotor having a rotating surface for contacting the photographic material, wherein at a point of contact of the rotating surface, the peripheral speed of the rotating surface is faster than the conveying speed of the photographic material. Photographic material drive. 2. The drive device according to claim 1, wherein the peripheral speed of the at least one drive rotor is substantially constant during a change or change in the speed of transporting the photographic material. 3. The rotating surface of at least one drive rotor,
2. The driving device according to claim 1, wherein the width of the photographic material is larger than that of the photographic material to be conveyed. 4. The rotating surface of at least one drive rotor,
2. The driving device according to claim 1, wherein the driving device has at least one of a groove portion not in contact with the photographic material to be conveyed and / or a contact region spaced apart from the photographic material. 5. The drive device according to claim 4, wherein the contact area is constituted by spaced ribs or rings, and is rotationally symmetric about and extends around the axis of the drive rotor. 6. The rotating surface for driving the photographic material is smooth,
2. The drive according to claim 1, wherein the drive is made of polypropylene or PVC and has a lower coefficient of friction than rubber. 7. At least one guide roller is provided, which is configured as a driven roller for contacting the photographic material to be conveyed and has a contact surface smaller than the width of the photographic material, said contact surface being cylindrical. The driving device according to claim 1, wherein the driving device has a rough surface. 8. A photographic material transporting device for transporting photographic material, wherein the photographic material is transported using the photographic material driving device according to claim 1, and the photographic material is supplied to the driving device. A conveyor device for feeding or removing the photographic material conveyed from the driving device, wherein the supply or discharge of the photographic material is performed at a conveying speed lower than a peripheral speed of a driving rotor of at least one of the driving devices. A photographic material conveying device characterized by the above-mentioned. 9. The photographic material conveying device according to claim 8, wherein the conveyor device includes a material feeding device for feeding the photographic material into the conveying passage of the driving device at a predetermined conveying speed. 10. The material feed device is configured as a leader band passage, wherein at least one drive rotor is separately driven or uncoupled to said leader band passage. Item 10. A photographic material conveying device according to Item 9. 11. A photographic developing machine for developing a photographic material, wherein the photographic material is transported to the developing machine.
A photographic developing machine comprising the photographic material conveying device according to any one of claims 8 to 10. 12. The method according to claim 1, wherein most of the drive rotors contact the back surface of the photographic material instead of the front surface to convey the photographic material, and most of the guide rollers contact the front surface of the photographic material. The photographic developing machine according to claim 11, wherein: 13. The developing rotor according to claim 1, wherein the driving rotor is arranged outside the wet portion in the developing machine, and is particularly arranged from the input side to the output side of the developing machine.
13. The photographic developing machine according to 1 or 12.