JPH1159997A - Photosensitive material processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent tooth jump of a toothed belt by enabling relative rotation of a driving pulley and a belt supporting roller. SOLUTION: The center in the axial direction of the outer circumferential face of a guide roller 68 around which an endless belt is wound is constituted by a driving pulley 102 that a gear-state driving tooth 102A is formed on the outer circumferential face, and the driving pulley 102 is closely fitted to a supporting shaft 68A of the guide roller 68 and is not relatively rotated with the supporting shaft 68A. The portions of the guide roller 68 at the both sides of the driving pulley 102 are constituted by belt supporting rollers 104 whose outer circumferential face is smooth so as to support the endless belt. Sliding bearings 106 are fitted to both ends of the belt supporting rollers 104, and the inner circumferential face of these sliding bearings 106 slide with the supporting shaft 68A so that the belt supporting rollers 104 can be relatively rotated with the supporting shaft 68A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photosensitive material processing apparatus capable of preventing tooth jump of a toothed belt, and is suitable for, for example, a printer processor.

[0002]

2. Description of the Related Art Conventionally, a paper magazine containing photographic paper, which is a photosensitive material previously wound up in a roll shape, is loaded into a photosensitive material processing apparatus such as a minilab, and the paper magazine is loaded into the photosensitive material processing apparatus. Is supplied with photographic paper. In the printer section of the photosensitive material processing apparatus, the photographic paper is pulled out from the paper magazine and conveyed to the printing position, where the image on the negative film is printed, and the photographic paper is located following the printer section. The data is sent to the processor unit, developed, and finished as a print.

Further, in the above-mentioned printer section, the printing paper is conveyed by being attracted to a toothed belt having meshing teeth in order to improve the feeding accuracy. At this time, the toothed belt is supported and driven and rotated by a roller having a drive pulley and a belt supporting roller integrally formed by pinning or the like.

In other words, the reason why the drive pulley is located only on a part of the roller is to reduce the load on the toothed belt, and to suck the printing paper through the small hole formed in the toothed belt. This makes it possible to adsorb the photographic paper to the toothed belt.

[0005]

However, even if an attempt is made to make the diameter of the driving pulley and the diameter of the belt supporting roller the same, these diameters are usually slightly different. If the toothed belt is not rotated while causing slippage between the belt and the contact surface, the teeth of the toothed belt may jump, and the photographic paper may not be accurately conveyed without feeding variation.

It is possible to cause a slip between the outer peripheral surface of the belt support roller and the contact surface of the toothed belt by reducing the tension applied to the toothed belt, but the tension is reduced. As a result, the feeding variation occurs in the photographic paper.

The present invention has been made in view of the above circumstances, and has as its object to provide a photosensitive material processing apparatus capable of preventing the jumping of a toothed belt by making a driving pulley and a belt supporting roller relatively rotatable.

[0008]

According to a first aspect of the present invention, there is provided a photosensitive material processing apparatus comprising: a toothed belt having meshing teeth; and a toothed belt connected to a driving source and wound around the meshing teeth to rotate while meshing with the meshing teeth. And a belt support roller that is rotatable relative to the drive pulley and is coaxial with the drive pulley and supports the toothed belt.

According to a second aspect of the present invention, there is provided a photosensitive material processing apparatus, comprising: a toothed belt having meshing teeth; a driving pulley connected to a driving source and having the toothed belt wound thereon to rotate while meshing with the meshing teeth; A belt support roller that is rotatable relative to the pulley and is coaxial with the drive pulley to support the toothed belt, and a collar that prevents the belt support roller from moving in the thrust direction.

The operation of the photosensitive material processing apparatus according to claim 1 will be described below. A toothed belt is wound around a driving pulley connected to a driving source, and the driving pulley rotates the toothed belt while meshing with the meshing teeth of the toothed belt, and is rotatable relative to the driving pulley and is coaxial with the driving pulley. A belt supporting roller disposed at the side supports the toothed belt.

Therefore, since the driving pulley and the belt supporting roller rotate relative to each other, even when the diameter of the driving pulley and the diameter of the belt supporting roller are different, the distance between the outer peripheral surface of the belt supporting roller and the contact surface of the toothed belt is increased. Therefore, there is no need to relatively slide them, so that tooth jump of the toothed belt does not occur.

The operation of the photosensitive material processing apparatus according to claim 2 will be described below. A toothed belt is wound around a driving pulley connected to a driving source, and the driving pulley rotates the toothed belt while meshing with the meshing teeth of the toothed belt, and is rotatable relative to the driving pulley and is coaxial with the driving pulley. A belt supporting roller disposed at the side supports the toothed belt. The collar also prevents the belt support roller from moving in the thrust direction.

Therefore, the present invention operates in the same manner as in the first embodiment, but since the collar prevents the belt supporting roller from moving in the thrust direction, the belt supporting roller does not move inadvertently, and the belt supporting roller does not move inadvertently. The rollers will function reliably.

[0014]

Next, a photosensitive material processing apparatus according to a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a photosensitive material processing apparatus according to this embodiment. The photographic printing apparatus 10 constituting the printer section of the photosensitive material processing apparatus has a structure in which a paper magazine 12 containing photographic paper P can be loaded. When the opening / closing door 14 is closed after the paper magazine 12 is inserted into the photoprinting apparatus 10, the loading of the paper magazine 12 is completed. Therefore, the photographic printing apparatus 10 is an apparatus main body that exposes the photographic paper P sent from the paper magazine 12.

On the other hand, in FIG.
A drive roller 16 around which the leading end of the photographic paper P is wound is rotatably supported on the upper left portion. A pulley 94 is attached to the drive roller 16 so as to be coaxial with the drive roller 16. ing.

Further, the driving force of a motor 20 which is a drive source disposed in the photographic printing apparatus 10 is transmitted through a drive belt 18 which is a timing belt provided in the photographic printing apparatus 10 and is wound around a pulley 94. The driving roller 16 is transmitted to the driving roller 16 and rotates. An encoder (not shown) for detecting the rotation amount of the motor 20 is attached to the motor 20, and the encoder is connected to a control circuit (not shown). For this reason, information on the amount of rotation of the motor 20 is transmitted to the control circuit.

Further, a pair of nip rollers 80 and 82 are disposed so as to face the drive roller 16, and the drive roller 1
The photographic paper P is sandwiched between the nip rollers 80 and 82 and the leading end of the photographic paper P is fed into the photographic printing apparatus 10.

As described above, in the loading completed state shown in FIG. 1, the drive roller 16 and the nip rollers 80 and 82 sandwich the photographic paper P, and the leading end of the photographic paper P is
It is transported so as to be sent out.

On the other hand, a guillotine cutter 22 (hereinafter simply referred to as a cutter 2) having an upper blade and an upper blade is provided in the photoprinting apparatus 10.
2), and the cutter 22 cuts the photographic paper P coming out of the magazine 12. Further, the motor 24 is connected to a control circuit, and the operation of stopping and operating the cutter 22 is controlled by the control circuit.

In FIG. 1, the upper surface is positioned horizontally (see FIG. 1) on the downstream side in the transport direction of the photographic paper P on the right side with respect to the cutter 22.
A support base 46 is formed along the upper, left and right directions). A winding roller 52 that winds the endless belt 42 is disposed between the support base 46 and the cutter 22 in a horizontal direction (in FIG. 1, a direction perpendicular to the paper surface). Above the winding roller 52, an elevating roller 54 that sandwiches the endless belt 42 with the winding roller 52 is disposed in parallel with the winding roller 52.

Both ends of the elevating roller 54 in the axial direction are supported by an arm 56. The arm 56 is connected to a self-holding solenoid 66 via a link 64.
Accordingly, when a pulse voltage is applied to the solenoid 66 and the solenoid 66 is actuated, the arm 56 rises, and the elevating roller 54 moves the endless belt 4.
2 away from it.

When a pulse voltage of the reverse operation is input to the solenoid 66, the arm 56 and the lifting roller 54 come into contact with the endless belt 42 on the winding roller 52 by the urging force of a spring (not shown), and the endless belt The printing paper P can be held between the printing paper P and the printing paper P.

A guide roller 68 around which the above-described endless belt 42 is wound is located downstream of the support base 46 in the transport direction of the photographic paper P. At a position adjacent to the guide roller 68, a guide roller 69 is disposed such that the lower surface is substantially the same height as the upper surface of the winding roller 52, and the guide roller 69 presses against the outer periphery of the endless belt 42. Have been.

That is, as shown in FIG. 1, the endless belt 42 is wound around the outer circumference of the guide roller 69 over about 1/4 of its circumference, and thereafter the endless belt 42 is wound around the outer circumference of the guide roller 68. The endless belt 42 is wound around about ／, and the endless belt 42 in this portion is formed in an S shape. Further, the endless belt 42 is wound around the tension roller 76 below the guide roller 68 to form an inverted triangular movement locus.

On the other hand, the guide roller 68 is
The endless belt 42 is driven and rotated by receiving the driving force of the motor 72 via a timing belt 74 wound around a pulley (not shown) disposed coaxially with the endless belt 42. The endless belt 42 is driven to rotate clockwise in FIG. Let it.

Therefore, the photographic paper P sent from the paper magazine 12 is cut into a desired length by the cutter 22, and then is placed on the endless belt 42, where the image printing position is the position on the optical axis S of the printing light. It is transported to G. Then, the printing light from the light source 26 reaches the photographic paper P via the optical means 28 and the shutter 32, and the negative film N
Is exposed and printed on the photographic printing paper P, and a portion where this image is printed becomes a printed image.

Further, the printing paper P on which the printing of the image has been completed.
Is held between the guide roller 68 and the guide roller 69, the transport direction is changed from the horizontal direction to the vertical direction, and the paper is sent out in the vertical direction. Thereafter, the printing paper P is sent to the developing device 36 via the transport path 34, and the printed image is developed.

That is, the developing device 36 includes a developing tank,
A bleach-fixing tank, a washing tank, and a drying section (not shown in FIG. 1) are provided to develop the photographic paper P transported from the photographic printing apparatus 10.

On the other hand, as shown in FIG.
Has a plurality of small holes 44 formed over the entire area thereof, and a support table 46 on which a part of the endless belt 42 is placed so that the photographic paper P is horizontally arranged at the image printing position G.
Are formed with a large number of holes 46A.

Further, the inside of the support table 46 is formed in a hollow shape, and a pair of communication ducts 84 (only one is shown in the figure) corresponding to both ends in the width direction of the endless belt 42 are connected to the support table 46. Have been. These communication ducts 84
Is located below the endless belt 42 bypassing the folded portion of the endless belt 42 disposed below the support base 46. The communication duct 84 is further extended downward and connected to a fan box 86 provided with a suction fan 85.

As a result, the air in the support base 46 escapes in the width direction from the loop of the endless belt 42 through the communication duct 84, is sucked by the suction fan 85 and blows out to the outside. It becomes negative pressure. This negative pressure is transmitted to the printing paper P on the endless belt 42 through the hole 46A of the support base 46 and the small hole 44 of the endless belt 42, and the printing paper P is transferred to the endless belt 42 as indicated by an arrow A. It is sucked.

For this reason, the printing paper P is not merely put on the endless belt 42 but is sucked toward the endless belt 42, so that the printing paper P is transported by the endless belt 42 without fail.

As shown in FIG. 2, an endless belt 4 is provided at the center in the width direction on the inner peripheral surface side of the endless belt 42 made of rubber.
2 is rotated by the endless belt 42A.
Are provided at equal intervals along the circumferential direction. That is, the endless belt 42 constitutes a toothed belt having the meshing teeth 42A.

Correspondingly, as shown in FIGS. 3 and 4, a gear-shaped driving tooth 102A is formed on the outer peripheral surface of the guide roller 68 around which the endless belt 42 is wound. And a driving pulley 102 made of aluminum.
Is tightly fitted to the support shaft 68A so as not to rotate relative to the support shaft 68A.

For this reason, the driving teeth 102 of the driving pulley 102
A meshes with the meshing teeth 42A of the endless belt 42,
As the drive pulley 102 is rotated by the motor 72, the endless belt 42 is rotated.

Further, the guide rollers 68 on both sides of the driving pulley 102 are formed of aluminum belt supporting rollers 1 having a smooth outer peripheral surface for supporting the endless belt 42.
04 respectively.

A pair of sliding bearings 106 made of polyacetal are fitted to both ends of the pair of belt supporting rollers 104, respectively. The inner peripheral surfaces of the sliding bearings 106 slide with the support shaft 68A. The belt support roller 104 is rotatable relative to the support shaft 68A. That is, the drive pulley 102 that rotates integrally with the support shaft 68A and the belt support roller 104 that is disposed coaxially with the drive pulley 102 are relatively rotatable.

A pair of collars 108 are tightly fitted to the support shaft 68A so as to sandwich the pair of belt support rollers 104, and the collars 108 support the support shafts 68A of the pair of belt support rollers 104. The movement in the thrust direction above is prevented.

As shown in FIG. 1, an easel device 78 is provided above the endless belt 42 moving on the support base 46.
Is provided so that the periphery of the printing paper P is covered when the framed image is printed on the printing paper P. Also,
As shown in FIG. 5, the drive teeth 102A may be provided at both ends in the axial direction, and the belt support roller 104 may be arranged between them.

The operation of the present embodiment will be described below. A photo magazine 12 for storing a paper magazine 12 for storing photographic paper P
0, the printing on the photographic paper P is started, and the drive rollers 16 arranged in the paper magazine 12 are driven.
Is driven by a motor 20 via a drive belt 18 at a constant speed, the drive roller 16 rotates clockwise, and the photographic paper P sandwiched between the drive roller 16 and the nip rollers 80 and 82 is moved from the paper magazine 12 Fixed amount is sent out.

The photographic paper P sent to the photoprinting apparatus 10 is cut by the cutter 22 into predetermined lengths.

Further, the cut photographic paper P is moved on a support base 46 by an endless belt 42 to expose and print an image on the photographic paper P, and to a developing device 36 via a transport path 34. And the printed images are respectively developed. Then, the above operation is repeated, and the printing paper P in the paper magazine 12 is sequentially consumed.

On the other hand, the endless belt 42 is wound around a driving pulley 102 connected to a motor 72 as a driving source via a timing belt 74, and the driving pulley 102
Rotates the endless belt 42 while meshing with the meshing teeth 42A of the endless belt 42. A belt support roller 104 rotatable relative to the drive pulley 102 and arranged coaxially with the drive pulley 102 supports the endless belt 42. Also,
The collar 108 prevents the belt support roller 104 from moving in the thrust direction.

Accordingly, the endless belt 42 is rotated by the driving pulley 102 and the belt supporting roller 104 constituting the guide roller 68, and the driving pulley 102 and the belt supporting roller 104 can rotate relative to each other. Even when the diameter of the belt support roller 104 is different, there is no need to slide the belt support roller 104 between the outer peripheral surface of the belt support roller 104 and the contact surface of the endless belt 42 so that the tooth jump of the meshing teeth 42A does not occur. become.

Further, the collar 108 is a belt supporting roller 1
Since the movement of the belt support roller 104 in the thrust direction is prevented, the belt support roller 104 functions reliably without careless movement of the belt support roller 104.

Next, a photosensitive material processing apparatus according to a second embodiment of the present invention will be described with reference to the drawings. The same members as those described in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

In the first embodiment, the driving pulley 102 is disposed at the axial center of the outer peripheral surface of the guide roller 68, and the belt support rollers 104 are disposed on both sides of the guide roller 68. In the form, instead of this, FIG.
As shown in FIG. 1, a belt support roller 104 is disposed at the center, and a pair of drive pulleys 102 are disposed on both sides.

Therefore, the present embodiment operates in the same manner as the first embodiment, but according to the present embodiment,
Belt support roller 104 by a pair of drive pulleys 102
Is prevented from moving on the support shaft 68A in the thrust direction, and the collar 108 becomes unnecessary, thereby reducing the manufacturing cost.

In the above embodiment, the driving pulley and the belt supporting roller are made of aluminum. However, polyacetal (POM) and Teflon (PTF) are used.
E) or any of polyethylene (PE) may be employed.

In the above embodiment, the photosensitive material is photographic paper. However, the present invention may be applied to the case of transporting a film such as a negative film.

In the above embodiment, the guide roller 6
Although the drive pulley 102 and the belt supporting roller 104 are provided on the roller 8, it is needless to say that they may be provided on other rollers.

[0053]

As described above, since the photosensitive material processing apparatus of the present invention has the above-described structure, the driving pulley and the belt supporting roller can be relatively rotated to prevent jumping of the toothed belt. Has the effect.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a photographic printing apparatus according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the periphery of the endless belt according to the first embodiment of the present invention, provided that only the upper surface of the support is shown.

FIG. 3 is an enlarged perspective view of a guide roller according to the first embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a guide roller according to the first embodiment of the present invention.

FIG. 5 is an enlarged perspective view of a guide roller according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Photo printing apparatus 42 Endless belt 42A Mesh teeth 68 Guide roller 102 Drive pulley 104 Belt support roller 108 Color

Claims (2)

[Claims] 1. A toothed belt having meshing teeth, a driving pulley connected to a driving source and wound around the toothed belt and meshing with the meshing teeth, and a driving pulley rotatable relative to the driving pulley. And a belt support roller disposed coaxially to support the toothed belt. 2. A toothed belt having meshing teeth, a driving pulley connected to a drive source and wound around the toothed belt and meshing with the meshing teeth, and a driving pulley rotatable relative to the driving pulley. A belt support roller disposed coaxially with the belt support roller for supporting the toothed belt; and a collar for preventing movement of the belt support roller in the thrust direction.