JPH03265716A - Driving force transmission device for photosensitive material handling device - Google Patents

Abstract

PURPOSE:To prevent damage from being caused to a mechanism-part for giving torque to a conveying roller, and breakage from being caused to a photosensitie material, by transmitting driving force through a body of rotation, a torque release slider, and making it possible for both the body of rotating and the slider to rotate relatively. CONSTITUTION:With a conveying roller 38, a key 54 is inserted into a rotary shaft 50, and correspondingly a torque release slider 56 is put onto the shaft. For the rotary shaft 50, an E ring 60 is attached to a groove 58 around the shaft, and a support plate 62, a compression coil spring 64 are attached between the E ring and the torque release slider 56. On the other hand, a helical gear 42, an E ring 68 are attached to the other end side of the rotary shaft 50 to prevent the movement of the torque release slider 56 due to the compression coil spring 64. A circular groove 70, a tooth-part 72 are formed in the gear 42, and correspondingly a tooth-part 74 is provided on the torque release slider 56 and is engaged with the tooth-part 72. In a state where the rotation of the rotary shaft 50 is prevented, the helical gear 42 and the torque release slider 56 relatively rotate, and driving force is not transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a driving force transmission device for a photosensitive material processing apparatus that processes a photosensitive material while conveying it along a predetermined conveyance path.

[Prior art]

In a photosensitive material processing apparatus that processes sheet-like or long-form photosensitive materials such as photographic film by immersing them in a processing solution stored in a processing tank and dries them in a drying chamber, the A pair of conveyance rollers provided serve as a pacemaker for conveying the photosensitive material. Further, a plurality of conveyance rollers are arranged upstream of this conveyance roller, and the photosensitive material is conveyed by these plurality of conveyance rollers and passes through a drying section.

In addition, in order to prevent the photosensitive material from meandering as it passes through the drying section, the multiple conveyance rollers are set at a lower conveyance speed than the pacemaker conveyor rollers placed downstream, and their drive shafts is equipped with a one-way clutch as a torque limiter. Therefore, the plurality of conveyance rollers convey the photosensitive material in the downstream direction while being pulled by the conveyance rollers serving as a pacemaker via the photosensitive material.

[Problem to be solved by the invention]

However, in the above-mentioned photosensitive material processing apparatus, the one-way clutch provided on each drive shaft of the plurality of transport rollers includes a spring-wound type, claw blade type, ratchet type, etc., but these have low speed in the transport direction. It can be rotated by torque, but cannot be rotated in the opposite direction to the transport direction. For this reason, if the photosensitive material jams, the photosensitive material is pulled in the opposite direction to the conveying direction due to jam processing, etc., and high torque is applied to the multiple pairs of conveying rollers in the opposite direction to the conveying direction. However, there were problems in that the one-way clutch would lock, damaging the roller drive gear and damaging the photosensitive material.

In addition, if there is a tension imbalance between the upstream conveyance roller and the downstream conveyance roller in the conveyance path, high torque in the opposite direction to the conveyance direction may act on the downstream conveyance roller via the photosensitive material. This caused the one-way clutch to lock, damaging the roller drive gear and damaging the photosensitive material.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a driving force transmission device for a photosensitive material processing apparatus that can prevent damage to the mechanism section that applies rotational force to the conveyance roller and damage to the photosensitive material.

[Means to solve the problem]

A driving force transmission device for a photosensitive material processing apparatus according to the present invention transmits the driving force of a driving means to a conveyance roller, and processes a photosensitive material while conveying the photosensitive material along a predetermined conveyance path along the conveyance roller. A driving force transmission device for a processing device, the rotating body being pivotally supported on the rotation shaft of the conveyance roller and rotated by the driving force of the driving means, and a rotating body that is inserted through the rotation shaft of the conveyance roller and rotates together with the rotation shaft. a torque release slider movable in the axial direction of the shaft, and the torque IJ
a biasing means for biasing the IJ-slider in a direction in which it comes into contact with the rotary body; and a biasing means for transmitting the rotational force of the rotary body to the torque release slider when the rotary body and the torque release slider come into contact with each other and rotating the IJ-slider. When the difference between the driving torque of the body and the driving torque of the torque release slider is more than a predetermined value, the torque release slider is axially moved in a direction away from the rotating body against the urging force of the urging means to rotate relative to the rotating body. and a connecting means for making the connection.

[Effect]

According to the present invention, the conveying roller is rotated by the driving force of the driving means being transmitted through the rotating body and the torque release slider. Thereby, the photosensitive material is transported along a predetermined transport path. During this transportation, there are, for example, developing, fixing, washing, and drying processes, and the photosensitive material is taken out after these processes.

Here, in order to prevent the photosensitive material from loosening or meandering due to the slack while the photosensitive material is being conveyed, the rotational speed of the conveying roller on the most downstream side is set at a speed higher than that of the conveying rollers on the upstream side. I'm rotating it a little faster.

Furthermore, in cases where jamming of the photosensitive material occurs, more tensile force than necessary acts on the photosensitive material. Even in such a case, in the present invention, since the rotating body and the torque release slider are relatively rotated by the connecting means, a tensile force exceeding a predetermined value is not applied to the photosensitive material, and the roller drive gear and the photosensitive material damage can be prevented.

〔Example〕

FIG. 3 shows a photosensitive material processing apparatus 10 according to this embodiment. The photosensitive material processing apparatus 10 includes an insertion port 14 for the film 12, and a developing tank 16, a fixing tank 18, a washing tank 20, a drying part 22, and a film receiving box 24, which are arranged in the processing section 15 according to the processing order. .

A developer is stored in the developer tank 16, and the film 12
is immersed in a developer to be developed.

A fixer is stored in the fixer tank 18, and the developed film 12 is immersed in the fixer to be fixed.

Washing water is stored in the washing tank 20, and the fixed film 12 is immersed in the washing water and washed.

The drying section 22 is equipped with a drying chamber 26 for drying the film 12, and is also provided with an intake duct 28 and an exhaust duct 30 communicating with this drying chamber 26. A fan 32 and a heater 34 are arranged in the intake duct 28,
Air introduced into the air introduction duct 28 by the fan 32 is heated by the heater 34 to become dry air, and this dry air is supplied to the drying chamber 26, and then to the exhaust duct 30.
It is designed to be exhausted to the outside through. Therefore, the wet film 12 that has been washed in the washing tank 20 is dried by drying air in the drying section 22. The film receiving box 24 sequentially stores the films 12 that have been dried in the drying section 22.

Further, in the photosensitive material processing apparatus 10, a plurality of conveyance rollers pivotally supported by a rack (not shown) are arranged along the processing line of the film 12, and the film is inserted into the photosensitive material processing apparatus 10 from the insertion opening 14. 12 is automatically conveyed by a conveyance roller and sequentially moves to a developing tank 16 and a fixing tank 1.
8. After being sent to the washing tank 20 and subjected to various treatments, the drying section 2
2 and then sent to a film receiving box 24.

The drying section 22 is formed of a vertically long box, and an entrance 36 for the film 12 is provided on the top surface thereof.

Inside the drying chamber 26, a plurality of conveyance rollers 38 are arranged in a staggered manner in the vertical direction. As shown in FIG. 2, a helical gear 42, which is a rotating body, is provided at one end of the rotating shaft 50 of these conveying rollers 38 via a torque limiter mechanism 40, which will be described later. Further, the drying section 22 is provided with a drive shaft 44 that rotates by the driving force of a motor (not shown), and its axial direction is in the vertical direction of the drying section 22 (the rotation shaft 5
(direction perpendicular to 0). Helical gears 46 are attached to the drive shaft 44 at regular intervals, and each mesh with a plurality of helical gears 42 arranged in a row. Therefore, when the drive shaft 44 rotates, the helical gears 46, 42
The rotational force is transmitted to the rotating shaft of the conveyance roller 38, and the conveyance roller 38 is rotated in a predetermined direction.

Therefore, as shown in FIG. 3, the film 12 carried in from the carry-in port 36 is held between a plurality of conveying rollers 38 arranged in a staggered manner and guided to the lower part of the drying chamber 26.

A pair of pacemaker conveyance rollers 48 are disposed at the bottom of the drying chamber 26 . This conveyance roller 48 is also connected to the drive shaft 44 (see FIG. 1) via a gear (not shown), and rotates in response to the rotational force of the drive shaft 44.

Note that the conveyance roller 48 is rotated at a slightly faster speed than the conveyance roller 38 due to the gear ratio.

The torque limiter mechanism section 40 will be explained in detail below.

As shown in FIGS. 1 and 2, the conveying roller 38 has a key groove 52 formed on the outer periphery of its rotating shaft 50, into which a key 54 is inserted. A cylindrical torque release slider 56 is inserted into the rotating shaft 50 in correspondence with the key 54 . For this reason, the torque release slider 56
is movable in the axial direction of the rotation shaft 50, and rotation around the shaft is prevented by a key 54. Thereby, the rotational force of the torque release slider 56 is transmitted to the rotating shaft 50 via the key 54.

A groove 58 around the shaft is formed on the outer periphery of the rotating shaft 50 on the side closer to the base than the keyway 52, and an E-ring 60 is attached to the groove 58.

A ring-shaped support plate 62 is inserted in contact with this E-ring 60, and this support plate 62 and the torque release slider 56
A compression coil spring 64 is attached between and. As a result, the torque release slider 56 is moved toward the distal end of the rotating shaft 50 by the biasing force of the compression coil spring 64.
(in the direction of the arrow in the figure).

Further, the helical gear 42 is rotatably inserted into the rotating shaft 50 on the distal end side of the torque release slider 56 . A groove 66 around the shaft is formed on the distal end side of the helical gear 042 of the rotating shaft 50, and an E ring 68 is attached via a thrust washer 67. Thereby, the movement of the torque release slider 56, which is biased by the compression coil spring 64, is prevented by the torque release slider 56 and the helical gear 42 coming into contact with each other.

A groove 70 is formed on the surface of the helical gear 42 facing the torque release slider 56, and a tooth portion 72 is formed on the bottom surface of the groove 70. Correspondingly, a tooth portion 74 is also provided on the surface of the torque release slider 56 facing the helical gear 42.
are formed and mesh with the teeth 72. That is, when the helical gear 42 receives the driving force from the helical gear 46 of the drive shaft 44 and rotates, the rotational force is transmitted to the toothed portion 72.7.
4 to the torque release slider 56.

Here, in a state where rotation of the rotating shaft 50 is prevented,
Rotation of the torque release slider 56 will also be prevented. When the helical gear 42 rotates in this state, the slope of the tooth 72 presses the slope of the tooth 74, causing the helical gear 42 and the torque release slider 56 to rotate relative to each other, thereby releasing the torque. The slider 56 is compressed by the coil spring 6
As a result, the helical gear 42 and the torque release slider 56 are rotated relative to each other, and no rotational driving force is transmitted to the rotating shaft 50. , and no load is applied to the drive of the helical gear 42.

Note that due to the angle of the slope of one tooth of the helical gears 72 and 74 and the biasing force of the compression coil spring 64, the helical gear 42
It is possible to adjust the separation force that is applied during relative rotation between the torque release slider 56 and the torque release slider 56, and the angle and biasing force are set according to a predetermined torque.

The operation of this embodiment will be explained below.

The film 12 inserted into the photosensitive material processing apparatus 10 through the insertion port 14 is transported by the transport roller 36, developed with a developer in the developing tank 16, fixed with a fixer in the fixing tank 18, and then transferred to the water washing tank 1 2 The film is washed with 2D washing water, dried with drying air in the drying section 22, and sent to the film receiving box 24.

The film 12 thus inserted into the photosensitive material processing apparatus 10 is automatically developed while being conveyed through the insertion port 14.

In this case, the conveyance roller 38 is set to have a lower conveyance speed than the conveyance roller 48, and the torque limiter mechanism 40 is interposed between the rotation shaft 50 of the conveyance roller 38 and the drive shaft 44. The conveying roller 38 is pulled in the conveying direction by the film 12, and a low torque of a predetermined value or more is applied to the torque limiter mechanism 40 in the conveying direction. As a result, the torque release slider 56 axially moves toward the base of the rotating shaft 50 against the biasing force of the compression coil spring 64, rotates relative to the helical gear 42, and absorbs the difference in rotation speed between them. A constant state of tension is applied to the film 12 (
The material is transported while maintaining a tensile force. This can prevent the film 12 from sagging.

On the other hand, if the rotation of the conveying roller 38 itself is stopped due to some action, or if the rotation of the conveying roller 38 is stopped due to jamming of the film 12 and a tensile force of more than a predetermined value is applied to the film 12, the torque release occurs. The rotation of the slider 56 also stops. At this time, since the helical gear 42 is directly connected to the drive shaft 44, its rotation continues, and the contact between the slopes of the teeth 72 and the slopes of the teeth 74 causes the torque release slider 56 to be compressed by the compression coil spring. 64
The rotating shaft 50 is pressed toward the base of the rotating shaft 50 against the urging force of the rotating shaft 50 . As a result, the helical gear 42 and the torque release slider 5
6, and the rotational driving force of the drive shaft 44 is not transmitted to the rotation shaft 50. Therefore, the film 12 is not subjected to tensile force more than necessary, and damage can be prevented. Further, since no excessive force is applied to the helical gear 42, etc., tooth loss etc. can be prevented.

In this embodiment, the torque limiter mechanism 40 is provided on the conveyance roller 38 of the drying section 22, but instead of this, a torque limiter mechanism 40 is provided on each of the helical gears arranged in plurality on the drive shaft 44, which is the drying drive main shaft. It is also possible to apply the present invention to a conveyance roller of a processing rack disposed in the developer tank 16 or the like.

〔Effect of the invention〕

As described above, the driving force transmission device for a photosensitive material processing apparatus according to the present invention has the excellent effect of preventing damage to the mechanism section that applies rotational force to the conveying roller and damage to the photosensitive material.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the torque limiter mechanism of a photosensitive material processing apparatus according to an embodiment of the present invention, and FIG.
The line sectional view and FIG. 3 are schematic configuration diagrams of the photosensitive material processing apparatus. DESCRIPTION OF SYMBOLS 10... Photosensitive material processing device, 26... Drying chamber, 40... Torque limiter mechanism, 42... Helical gear, 44... Drive shaft, 46... Helical gear, 48 ...Conveyance roller, 56...Torque release slider, 64...Compression coil spring, 72.74...Tooth portion.

Claims (1)

[Claims] (1) A driving force transmission device for a photosensitive material processing apparatus that transmits the driving force of a driving means to a conveyance roller and processes the photosensitive material while conveying it along a predetermined conveyance path along the conveyance roller, a rotating body that is supported by the rotating shaft of the conveying roller and rotates by the driving force of the driving means; and a torque release slider that is inserted through the rotating shaft of the conveying roller, rotates integrally with the rotating shaft, and is movable in the axial direction of the rotating shaft. , urging means for urging the torque release slider in a direction in which it comes into contact with the rotating body, and transmitting the rotational force of the rotating body to the torque release slider when the rotating body and the torque release slider are brought into contact by the urging means. At the same time, when the difference between the driving torque of the rotating body and the driving torque of the torque release slider is greater than a predetermined value, the torque release slider is axially moved in a direction away from the rotating body against the biasing force of the biasing means. A driving force transmission device for a photosensitive material processing apparatus, comprising a connecting means for relative rotation.