JP2000302305A - Photographic printing paper conveying device of photographic processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the photographic printing paper from being folded at its central part by providing a pressure roller with a small diameter part at its roller axial direction end side with respect to a pressure contact part capable of pressing the photographic printing paper held by a driving roller. SOLUTION: In the operating condition for conveying the photographic printing paper, the photographic printing paper is held between a pressure contact part 14A and a driving surface part 13A to be pressed and contacted therewith. On this occasion, an axial side end part 2a of the photographic printing paper is folded toward a small diameter part 14B. The small diameter part 14B is provided with a diameter smaller than the pressure contact part 14A so that the side end part 2a is not contacted with the small diameter part 14B even by the folding. By providing the difference in diameters, the wrinkling caused by the pressure contact of the end part 2a with the small diameter part 14B can be prevented even when the width side end part 2a of the photographic printing paper is folded. Thus, a central part in the width direction of the photographic printing paper can be prevented from being folded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic paper transport device for a photographic processing machine, which sandwiches photographic paper between a driving roller and a pressure roller and transports the photographic paper.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, the structure of a pressure roller is such that a surface for sandwiching photographic printing paper is formed on a large-diameter surface portion facing a driving surface of a driving roller, and the large-diameter surface portion is formed on a roller shaft center. It was formed while maintaining a constant diameter up to the end in the direction.

[0003]

Since the pressure roller has the configuration described above, both ends in the width direction of the conveyed photographic paper are in contact with the large-diameter surface. Then, as shown by the dotted lines in FIG.
The large-diameter surface portion acts as a resistor that bends toward the large-diameter surface portion, but the large-diameter surface portion becomes resistant to the bending. The photographic paper may be bent at the center of the printing paper as shown in FIG. SUMMARY OF THE INVENTION An object of the present invention is to provide a structure of a pressure roller capable of avoiding bending at the center of photographic paper.

[0004]

According to a first aspect of the present invention, a driving roller disposed inside the conversion path and a driving roller disposed outside the conversion path are provided at a portion of the photographic paper conveyance path where the traveling direction is changed. The pressing roller is configured so as to pinch and transport the printing paper, and the end portion of the pressing roller in the roller shaft center direction side is formed as a small-diameter small-diameter portion with respect to a pressing portion that presses the driving roller with the printing paper therebetween. The operation and effect are as follows. [Effects] In other words, the widthwise end of the photographic paper conveyed between the drive roller and the pressure roller extends to the small diameter portion of the pressure roller, but the widthwise end of the photographic paper is bent. Occurs, the small-diameter portion is smaller in diameter than the press-contact portion, so that the widthwise end of the photographic paper does not contact the small-diameter portion, or even if it does, the reaction force received from the small-diameter portion is reduced. Therefore, the wrinkles generated on the photographic paper are reduced accordingly, and the bending at the center of the photographic paper can be suppressed.

According to a second aspect of the present invention, in a traveling direction changing portion of the photographic paper transport path, printing is performed by a driving roller disposed inside the conversion path and a pressure roller disposed outside the conversion path. Both sides of the printing paper are protruded from both ends in the roller axis direction of the pressing roller in a state where the printing paper is sandwiched between the pressing roller and the driving roller, and the printing paper is sandwiched between the pressing roller and the driving roller. In the state, the length of the pressure roller in the axial direction of the roller is set, and a second guide member that guides both ends of the photographic paper is installed at a fixed portion at a position where both ends in the width direction of the photographic paper are located; The installation position of the second guide member is displaced from the contact surface between the pressure roller and the drive roller so as to be closer to the axis of the pressure roller, and the operation and effect are as follows. It is as. [Operation and effect] In this configuration, the guide of the printing paper is smoothly provided by providing a dedicated guide member without using a configuration in which the pressing roller receives the end portion in the width direction of the printing paper. It is not necessary to take a long length in the axial direction, and a compact configuration can be achieved. Since the position of the second guide member is displaced to a position closer to the axis of the pressure roller than the contact position between the drive roller and the pressure roller, which are fed with the photographic paper sandwiched therebetween, the widthwise end of the photographic paper is Even if the portion bends in the direction approaching its axis, the deflection is less restricted by the second guide member,
The bending phenomenon at the center in the width direction of the printing paper can be reduced.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a pair of the pressure rollers are provided, and a small diameter portion of each of the pair of the pressure rollers is provided. The first guide member for receiving the printing paper is provided between them, and the operation and effect are as follows. [Function and Effect] In other words, the widthwise end of the photographic paper which is not subjected to the pressing action of the drive roller can be received and guided by the first guide member, and the widthwise end of the photographic paper is bent toward the small diameter portion. However, it is possible to prevent the leading end of the printing paper from abutting on the small diameter portion when being sandwiched between the drive roller and the pressure roller, thereby preventing the printing paper from traveling.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the driving roller is formed of a material having a lower surface hardness than the pressure roller. A state in which both ends of the pressure contact portion in the roller axis direction protrude from both ends of the drive roller in the roller axis direction in a state where the pressure contact portion is in contact with the drive roller with the photographic paper sandwiched therebetween. The operation and effect are as follows. [Function and effect] In other words, the side end of the pressure roller on the side to be received with respect to the roller shaft center side end of the drive roller that presses the photographic printing paper is located further protruding outside, so that the roller shaft of the drive roller The pressure contact portion of the pressure roller exists at a position facing the end in the core direction, and the side end of the drive roller can be received by the pressure contact surface of the pressure roller. Therefore, for example, as shown in FIG. 6, when the roller shaft side end of the drive roller protrudes beyond the roller shaft side end of the press roller, the roller shaft side end of the press roller In some corners, a fold force acts on the photographic paper at the corners, causing scratches.However, there is a pressure contact portion of the pressure roller at a position facing the roller shaft side end of the drive roller. It is possible to prevent the folding force from acting on the paper.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the photographic processor includes an image generating section A for optically extracting a frame image of a negative film 1 as a photographic film at a front position of the apparatus.
And a roll of photographic paper 2 in the upper position of the apparatus.
And a photographic paper magazine 3 in which the frame image from the image generation unit A is stored in the apparatus.
And a transport device G for transporting the photographic paper 2 from the photographic paper magazine 3 beyond the exposure unit B is provided.
A developing section C for developing the photographic paper 2 is arranged at the rear of the apparatus main body.

The image generating unit A converts the light from the light source 4 into a film carrier D through a light control filter 5 including three kinds of filters of cyan, magenta, and yellow, and a mirror tunnel 6 for equalizing the light. The frame image of the negative film 1 is guided to the negative film 1, and the frame image of the negative film 1 is enlarged by a zoom lens 7, and the shutter 8 is opened to form an image at the exposure position of the exposure unit B.
The film carrier D includes a plurality of rollers 9 for feeding the negative film 1, an electric motor 10 for driving the plurality of rollers 9 in a synchronized state, and a negative mask 11 for extracting light rays only from the frame image area of the negative film 1. The CCD line sensor 12 has a posture in which the longitudinal direction is set in the width direction of the negative film 1 so as to measure the size of the frame image of the negative film 1.

[0010] As shown in FIGS.
Is provided with a delivery mechanism E composed of a number of rollers 23 and an electric motor 24 for driving these rollers to feed the printing paper 2 from one of the pair of printing paper magazines 3. A cutter 25 (an example of a cutting mechanism) having two cutting blades which are arranged at a shearing position so as to cut the photographic paper 2 and are driven by an electric actuator 25A, and a photographic paper 2 cut by the cutter 25 are negatively driven. An endless conveyance band 26 that conveys in a suction state by pressure, a plurality of loops 27 around which the endless conveyance band 26 is wound, and a number of rollers so as to send the photographic paper 2 from the endless conveyance band 26 to the developing unit C. Transport mechanism F having an endless transport belt 26
7 and an electric motor 29 for driving each of the rollers 28 of the transport mechanism F. The photographic paper 2 from the photographic paper magazine 3 is located at an intermediate position of the photographic paper feed path of the delivery mechanism E.
A contact type end sensor 30 for detecting the end of the contact is provided. In addition, the sending-out mechanism E, the cutter 25, and the endless transport band 26 constitute a photographic paper supply unit. The delivery mechanism E and the endless transport band 26 are referred to as a transport device G.

As shown in FIGS. 1 and 2, the developing section C includes a developing tank 34 having a plurality of processing tanks formed by a plurality of partition walls 34A.
A plurality of rollers 35 for sequentially supplying the photographic paper 2 to the respective processing tanks, an electric motor 36 for driving these rollers 35, and a heater 37 for drying the photographic paper 2 after the development processing; The horizontal transport conveyor 40 for feeding the discharged photographic paper 2 and the photographic paper 2 from the horizontal transport conveyor 40
And a sorter 39 for collecting the

The photographic processor includes a controller 41 as a control means having a microprocessor (not shown). The controller 41 controls the power to the light source 4 and controls the amount of exposure of the light control filter 5. Control of the electric actuator 5A to be set, control of the electric motor 10 for driving the roller 9 of the film carrier D, control of the electric motor 24 of the delivery mechanism E, and control of the electric actuator 25A for driving the cutter 25 Further, an output system for controlling the electric motor 29 for driving the endless conveyance belt 26 and the conveyance mechanism F and controlling the electric motor 36 for the roller 35 of the developing section C is formed. An input system for supplying signals from the CCD line sensor 12 and the terminal sensor 30 is formed, and an operation console 42, a monitor 43, and an alarm 44 such as a buzzer used for inputting an artificial setting signal are provided. ing.

The feed amount of the photographic paper 2 is controlled by using stepping motors as the electric motors 24, 29, and 36 for feeding the photographic paper 2, and providing an open signal for providing an intermittent signal corresponding to the actually recognized moving distance. The transport amount of the printing paper 2 is controlled by loop control.

The exposure conditions and the like are controlled in advance by running the negative film 1, reading each frame image by a scanner (not shown), and determining the exposure conditions for each frame image based on the read image. Then, an image that would be obtained when the photographic paper 2 is projected and exposed according to the determined exposure conditions is simulated and displayed on the monitor 43.

A description will be given of a roller driving mechanism provided on the path of the photographic paper 2 during the conveyance. As shown in FIG. 3, the photographic paper 2 is sandwiched between the driving roller 13 disposed inside the conversion path and the pair of pressure rollers 14, 14 disposed outside the conversion path at the traveling direction conversion portion in the photographic paper transport path. , And is configured to be sent out by the rotation of the driving roller 13. The driving roller 13 is made of rubber to improve the feeding performance, and the pair of pressure rollers 14, 14 provided along the feeding direction are made of aluminum. The function to receive the pressing force is enhanced.

As shown in FIG. 4, the drive roller 13 has large-diameter drive surfaces 13A, 13A on both sides of the intermediate portion 13B in the axial direction.
A is formed. On the other hand, the pressure roller 14
Pressing portions 14A, 14A are formed on both sides of the intermediate portion 14C in the axial direction, and the pressing portions 14A, 14A are disposed so as to face the driving surface portions 13A, 13A of the driving roller 13, respectively. The photographic paper 2 to be conveyed between the press contact portion 14A and the drive surface portion 13A is sandwiched and sent out by the rotation drive of the drive roller 13.

A small-diameter portion 14B is formed on the end side of the pressure contact portion 14A in the roller axis direction to take the following countermeasures. In other words, when the photographic paper 2 is transported, when the pressing portion 14A and the driving surface portion 13A are set in an operation state of pressing the photographic paper 2 therebetween, the widthwise side end 2a of the photographic paper 2 has the small diameter portion 14B. Bending toward. The small-diameter portion 14B is set to have a smaller diameter than the press-contact portion 14A so that the side end portion 2a does not contact the small-diameter portion 14B even if this bending occurs. Thus, even if the width direction side end 2a of the photographic paper 2 is bent by causing the diameter difference,
The end 2a does not wrinkle due to being pressed against the small diameter portion 14B, and it is possible to suppress the occurrence of bending at the center in the width direction of the printing paper 2.

As shown in FIGS. 3 and 5, the small-diameter portion 14B is provided with a plurality of circumferential grooves 14b, and T is formed over the small-diameter portions 14B of the pair of pressure rollers 14B.
A first guide member 15 having a U-shape is provided, and both wings of each first guide member 15 are fitted into the corresponding circumferential groove 14b to receive both side ends 2a in the width direction of the printing paper 2 and to move the printing paper 2. I try to make it smooth. The wing portion of the guide member 15 is inserted into the circumferential groove 14b so that the leading end of the photographic paper 2 is not caught.

Next, the length l of the driving surface portion 13A of the driving roller 13 in the axial direction and the pressing portion 1 of the pressing roller 14
The difference between the length L and the length L in the axial direction of 4A will be described. As shown in FIG. 4, the press contact portion 14A has a length L in the axial direction longer than the length 1 of the drive surface portion 13A, and the pressing portion 14A conveys the both side portions 13A and 14A across the photographic paper 2. When assembled in the state, both end portions 14a in the axial direction of the press contact portion 14A protrude. Since the drive roller 13 is easily deformed as compared with the rubber-made pressure roller 14 made of rubber, for example, as shown in FIG. 6, the length of the drive surface portion 13A in the axial direction is larger than the length of the press contact portion 14A. As a result, as shown in FIG. 4, the state in which the end portion 14a of the pressure contact portion 14A in the roller axis direction bites into the surface of the driving surface portion 13A made of rubber and bites the photographic paper 2 so that the photographic paper 2 is easily sandwiched. In addition, since the length L of the press contact portion 14A is longer than the length 1 of the drive surface portion 13A, the drive surface portion 13A does not bite into the press contact portion 14A, so that scratches and the like are not easily formed.

[Other Embodiments] (1) In the above embodiment, the pressure roller 14 has a structure in which a press contact portion 14A and a small diameter portion 14B are formed, as shown in FIG. , Pressure contact part 14A
May be formed so as to have only a portion corresponding to. In this case, the second guide member 16 extends from the fixed portion instead of the small-diameter portion 14B for guiding the both side ends 2a of the printing paper 2 in the width direction. This second
The guide member 16 is capable of holding the second end even if the side end 2a is bent.
The positional relationship is set so as to maintain a gap t that does not make contact with the guide member 16. (2) As for the material of each of the rollers 13 and 14, as long as the surface hardness of the drive roller 13 is smaller than that of the pressure roller 14, a resin or the like can be used without being restricted to a metal such as rubber or aluminum. Further, the lengths of the rollers 13 and 14 in the axial direction are not limited to those described in the embodiment. Further, as the pressure roller 14, the peripheral groove 14b may not be particularly formed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a photographic processor.

FIG. 2 is a schematic diagram showing a control system of the photographic processor.

FIG. 3 is a longitudinal sectional side view showing an arrangement configuration of a driving roller and a pressure roller.

FIG. 4 is a longitudinal sectional front view showing an arrangement configuration of a driving roller and a pressure roller.

FIG. 5 is a perspective view showing an arrangement configuration of a driving roller and a pressure roller.

FIG. 6 is a longitudinal sectional front view showing a state where an end of a driving surface of a driving roller in a roller axis direction protrudes from an end of a pressure roller.

FIG. 7 is a longitudinal sectional front view showing a second guide member.

FIG. 8 is a front view showing a conventional configuration.

[Description of Signs] 2 Photographic paper 2a Side edge of photographic paper 13 Drive roller 14 Pressure roller 14A Press-contact portion 14B Small diameter portion 15 Guide member 16 Guide member

Claims (4)

[Claims] And a pressure roller disposed inside the conversion path and a pressure roller disposed outside the conversion path to convey the photographic paper at a portion where the traveling direction is changed in the photographic paper transport path. A photographic paper transporting device for a photographic processor, wherein a smaller diameter portion is formed on the roller shaft core end side with respect to a pressure contact portion that presses against the drive roller with the photographic paper sandwiched therebetween. 2. A configuration in which a photographic paper is sandwiched between a driving roller disposed inside the conversion path and a pressure roller disposed outside the conversion path at a portion where the traveling direction is changed in the photographic paper transport path, and is sent out by rotation of the driving roller. In a state where the printing paper is sandwiched between the pressing roller and the driving roller, both ends in the width direction of the printing paper protrude from both ends in the roller axis direction of the pressing roller. Is set at a position where both ends in the width direction of the photographic paper are located.
A photographic paper transporter of a photographic processing machine in which a guide member is installed on a fixed portion, and an installation position of the second guide member is displaced from a contact surface between the pressure roller and a driving roller so as to approach an axis of the pressure roller. apparatus. 3. A pair of pressure rollers are provided,
3. The photographic paper transport device according to claim 1, further comprising a first guide member for receiving the photographic paper between the small diameter portions of the pair of pressure rollers. 4. The press-contact roller, wherein the drive roller is formed of a material having a lower surface hardness than that of the press roller, and the press-contact portion of the press roller is brought into contact with the drive roller with a printing paper sandwiched therebetween. The printing of the photographic processing machine according to any one of claims 1 to 3, wherein both ends of the drive roller in the roller axis direction protrude from both ends of the drive roller in the roller axis direction. Paper transport device.