JPH04147256A - Driving force transmission device for carrying roller for automatic developing device - Google Patents

Abstract

PURPOSE:To surely load a rack, to stably feed a film and to prevent the film from being damaged even when it is rapidly moved by providing a driving force transmission device between a roller and a rotating shaft and realizing the idle rotation of a pair of rollers. CONSTITUTION:The film 12 is carried to a developing tank, a fixing tank and a washing tank by plural carrying rollers 13. Then, when the rotary shaft 34 is rotated by a driving gear 58, a clutch 44 is also rotated and a spring 46 is tightly wound. Besides, frictional force is generated between the spring 46 and mounting parts 44A and 48A and a clutch disk 48 is rotated. Then, the rollers 36A and 36B are rotated. Since the carrying speed of the roller 13 is set to be slower than that of the carrying roller in a drying chamber, the spring 46 is loosened and the rollers 36A and 36B runs idle when the film 12 is drawn in a carrying direction and the torque equal to or more than a prescribed value acts on the driving force transmission device M. However, driving force is surely transmitted to the other roller 13 by the gear 58.

Description

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

[Prior art]

Automatic processors process photosensitive materials such as photographic film by immersing them in processing solutions in processing tanks such as a developing tank and a fixing tank in the processing section, and then dry the photosensitive materials in a drying room. .

In this automatic developing machine, a conveyance roller of a drying section located downstream in the direction of conveyance of the photosensitive material is used as a base maker for conveying the photosensitive material.

In other words, in order to prevent the photosensitive material from meandering as it passes through the processing section, the plurality of conveyance rollers placed upstream have a slower conveyance speed than the pacemaker conveyance rollers placed downstream. A driving force transmission device as a torque limiter is provided on the drive shafts of the plurality of conveyance rollers arranged at the upstream portion. Therefore,
The plurality of conveyance rollers convey the photosensitive material to the downstream portion while being pulled by the conveyance rollers serving as a pacemaker via the photosensitive material.

By the way, in order to prevent damage to the photosensitive material when the photosensitive material is transported faster than the transport speed of the upstream transport roller in accordance with the transport speed of the transport roller as a pacemaker, there is a The drive force transmission device releases the restraint by the drive gear that transmits the drive force, allowing the conveyance roller to rotate idly.

As shown in FIG. 4, this type of driving force transmission device uses a tightening force generated by tightening a spring 81 wound across a clutch 82 fixed to a rotating shaft 80 and a drive gear 84. , rotational force in the transport direction is transmitted from the drive gear 84 to the rotating shaft 80. For this reason, it is necessary to attach the clutch 82 and the drive gear 84 integrally to the outside of the bearing 42 attached to the side plate 40 of the developer tank, etc., and the portion of the clutch 82 that protrudes from the side plate 40 is large, so there is plenty of space on the outside of the side plate 40. Without it, installation would be difficult and design freedom would be limited.

Furthermore, as shown in FIG. 4, in the conventional conveyance roller 8G, the roller 88 and the rotating shaft 80 are integrated, so it is not possible to rotate the roller 88 separately from the rotating shaft 80. This resulted in the following inconveniences.

That is, a plurality of conveying rollers 86 are arranged in the automatic developing machine, and the conveying force of the conveying rollers 86 is
By means of a driving force transmission gear (not shown) arranged between 6 and 6,
The driving force of the driving source is sequentially transmitted to each conveying roller 86.

Therefore, in the conventional conveyance roller in which the rotation shaft 80 and the roller 88 are integrally configured, the conveyance speed of the conveyance roller is determined by the driving force transmission gear 84 and the drive gear 58 fixed to the rotation shaft.
It was regulated by the rotation speed.

Therefore, when the film 12 passes through the conveying roller 86, the moving speed of the film 12 is adjusted to the conveying speed of the conveying roller 32, which is a pacemaker and is arranged in the downstream drying section. However, since the driving gear 58 is restrained by a driving force transmission gear (not shown), it cannot follow the moving speed of the film 12, and as a result, slipping occurs between the film 12 and the transport port 86. , the film 12 may be damaged.

[Problem to be solved by the invention]

In consideration of the above facts, the present invention provides a driving force transmission device between the roller and the rotating shaft, so that the clutch portion does not protrude to the outside of the side plate and is not interfered with by the drive gear that transmits the rotational force. It is an object of the present invention to provide a driving force transmission device for conveying rollers in which a pair of rollers can rotate idly as a unit.

[Means to solve the problem]

A driving force transmission device for a conveyance roller for an automatic developing machine according to the present invention transmits the driving force of a driving means to the conveyance roller, and performs development processing while conveying a photosensitive material along a predetermined conveyance path along the conveyance roller. A driving force transmission device for a conveyance roller for an automatic processor, comprising: a cylindrical roller that is supported by a rotating shaft of the conveyance roller and is rotatable relative to the rotary shaft; and a clutch that rotates integrally with the rotary shaft. a clutch disk that is fixed to the roller and is applied with a rotational force in the photosensitive material conveying direction; and a winding that is wound over the clutch and the clutch disk and transmits the rotational force of the clutch to the clutch disk by a winding force. It is characterized by having a fastening means.

In the driving force transmission device for a conveyance roller for an automatic developing machine having the above structure, the driving force is transmitted from the driving means to the rotating shaft via the driving gear, and the rotating shaft rotates in the photosensitive material conveying direction. The tightening means, which is wound across the clutch fixed to the shaft and the clutch disk fixed to the cylindrical roller, tightens the clutch and the clutch disk.Thereby, it rotates together with the rotating shaft. A rotational force is applied to the clutch disk by the clutch, which causes the roller to rotate in the conveying direction.

On the other hand, if a torque larger than the predetermined torque is applied to the roller pair due to the photosensitive material held between the roller pair, the torque acting on the roller will be greater than the seaming force, and the roller will be faster than the rotation of the rotating shaft. also rotates quickly.

At this time, the driving force is transmitted to the other conveyance rollers without being interfered with by the rotation of the rollers.

〔Example〕

(Structure of automatic developing machine) FIG. 1 shows a schematic structural diagram of an automatic developing machine 10 including the driving force transmission device M shown in FIG. 2. As shown in FIG.

A horizontally arranged photosensitive material insertion table 11 is provided near the insertion opening 14 of the automatic processor 10, and is configured to insert an exposed photosensitive material, such as a film 12, from this photosensitive material insertion table 11. has been done.

Further, the automatic developing machine 10 includes a developing tank 16, a developing tank 16,
Fixing tank 18, washing tank 20, squeeze section 21, drying section 22
and a film receiving box 24 are arranged.

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

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

Further, the washing tank 20 contains washing water, and the fixed film 12 is immersed in the washing water and washed.

Further, in the squeeze section 21, the processing liquid adhering to the film 12 is squeezed by a conveying roller 13.

The drying section 22 is equipped with a drying chamber 26 for drying the film 12, and in this drying section 22, a washing tank 20 is installed.
The wet film 12 that has been washed with water is dried by drying air.

Finally, the films 12 that have been dried in the drying section 22 are sequentially stored in the film receiving box 24 to complete the development process.

Here, in this automatic developing machine 10, a plurality of conveying rollers 13 supported by a rack (not shown) are arranged along a processing line of the film 12. The inserted film 12 is automatically transported by the transport roller 13 and is sequentially transferred to the developing tank 1.
6. After being sent to a fixing tank 18 and a washing tank 20 and subjected to various treatments, the film is squeezed in a squeeze section 21 and sent to a film receiving box 24 via a drying section 22.

The drying section 22 is formed of a vertically long box, and an entrance 28 for the film 12 is provided on the top surface of the box.

Inside the drying chamber 26, a plurality of conveyance rollers 30 are arranged in a staggered manner in the vertical direction.

As shown in FIG. 2, a driving force transmission device M is provided at one end of the conveyance roller 13. As shown in FIG.

As a result, rotational force is transmitted to the rotating shaft 34 of the conveyance roller 13 by a driving means (not shown), and the conveyance roller 13 is rotated in a predetermined direction.

As shown in FIG. 1, the film 12 carried in through the carry-in port 28 is guided below the drying chamber 26 by a plurality of rollers 30 arranged in a staggered manner.

A pacemaker transport roller 32 is provided in the drying chamber 26 . The conveying roller 30 is also configured to have rotational force transmitted by gears from the same driving means as the conveying roller 32.

As shown in FIG. 3, the conveying roller 13 is composed of a cylindrical roller 36A and a rotating shaft 34, and the cylindrical shaft end 38 whose outer diameter is the same as the inner diameter of the roller 36A is located inside the roller 36A. It is inserted into and fixed.

The rotating shaft 34 is inserted into the axial center of the shaft end 38 so as to be relatively rotatable. The roller 36A is pivotally supported on the rotating shaft 34 via the shaft end 38.

Further, the rotating shaft 34 is supported by a bearing 42 attached to the side plate 40, and a clutch 44 is fixed to the rotating shaft 34 between the bearing 42 and the conveying roller 13. The clutch 44 includes, on its outer periphery, a mounting portion 44A for the spring 46, a flange portion 44B that receives the axial biasing force of the spring 46, and an insertion portion 44C that is inserted into the clutch disk 48 along the rotating shaft 34.

Further, the shaft center of the clutch 44 has a circular shaft hole 45, and is fixed to the rotary shaft 34 with a pin 50 to a hole 34A formed in the rotary shaft 34 inserted therein so as not to slip.

This clutch desk 48 has a circular clutch 44,
It is fitted so that it can rotate. A protrusion 54 is formed in the direction away from the axis of the clutch disk 48, and the protrusion 54
It fits into the notch 55 formed in the clutch disk 4.
8 is transmitted to the roller 36A, and the clutch disk 4
8 and roller 36A rotate together.

Further, the clutch 44 is also provided on the outer periphery of the clutch disk 48.
Similarly, a mounting portion 48A of the spring 46 is formed,
A spring 46 is press-fitted across the mounting portions 44A and 48A. This spring 46 rotates 1i11
When 34 rotates in the transport direction (in the direction of the arrow in FIG. 3), the winding becomes tighter, and a frictional force is generated between the mounting portion 44A1 and the mounting portion 48A and the spring 46.

Further, a retaining ring 56 is fixed to the roller 36A side of the clutch disk 48 to prevent the clutch disk 48 and the clutch 44 from shifting in the direction of the rotating shaft 34.

On the other hand, at the tip of the rotating shaft 34 protruding from the bearing 42,
A drive gear 58 that transmits the driving force of a drive means (not shown) is fixed by key coupling or the like, and is prevented from shifting in the axial direction by an E IJ ring 60.

Note that the above-mentioned driving force transmission device M is also attached to the left end portion of the roller 36B.

Next, the operation of the embodiment of the present invention constructed as described above will be explained.

The film 12 is automatically conveyed by a conveyance roller 13 and sequentially sent to a developing tank 16 , a fixing tank 18 , and a washing tank 20 , where it undergoes various treatments, and then transferred to a squeeze section 21 and a drying section 2
2 and then sent to a film receiving box 24.

As shown in FIG. 2, a rotational force from a drive means (not shown) in the direction of transporting the film 12 is applied to the drive gear 58.
When transmitted to, it rotates! ! 34 rotates integrally with the drive gear 58 in the direction in which the film 12 is conveyed (indicated by the arrow), and the clutch 44 fixed to the rotating shaft 34 also rotates in the direction in which the film is conveyed. At this time, the spring 4B, which is wound across the mounting portion 44A of the clutch 44 and the mounting portion 48A of the clutch disk 48, is tightened, and the spring 4B is wound tightly between the mounting portion 44A1 and the mounting portion 48A of the clutch disk 48.
generates a frictional force between. This frictional force applies rotational force to the clutch disk 48, and the clutch disk 48
rotates in the transport direction of the film 12. Here, since the clutch disk 48 is fixed to the roller 36A, the roller 36A rotates together with the clutch disk 48.

However, since the conveying speed of the conveying roller 13 is set to be slower than that of the conveying rollers 30 and 32, for example, when the film 12 is pulled in the conveying direction by the t1 film 12, the conveying roller 13 is set to have a conveying speed lower than that of the conveying rollers 30 and 32. torque acts.

This torque loosens the spring 46 wound around the mounting portions 44A, 48A, and the rollers 36A, 36B rotate idly.

Here, since the roller 36A is formed separately from the rotating shaft 34, it rotates due to the torque applied by the film 12, and in synchronization with this, the roller 36B shown in FIG. 2 also rotates through the film 12. However, since the driving force transmission device M is also attached to the end of the rotating shaft 34 of this roller 36B, the roller 36B is not restrained by the driving gear 58 and rotates together with the roller 36A. .

Therefore, even if the rollers 36A and 36B idle due to the torque of the pacemaker transport roller 32 exceeding a predetermined value, the drive gear 58 can reliably transmit the driving force to the other transport rollers.

Further, since the driving force transmission device M is provided inside the side plate 40, a cross (not shown) for conveying the film 12 from the developer tank 16 to the fixing tank 18 on the developing rack (not shown) installed in the developer tank 16, for example. When the overrack is placed, both side plates 40 can be placed close to each other, so the film 12 can be stably transported.

In addition, in this embodiment, the conveyance roller 13 when conveying the film 12 and the conveyance roller 32 for pacemaker are used.
The rotational peripheral speed ratio was set to 1:1.05.

Further, the drive transmission device M is connected to the drying section 2 of the conveying roller 13.
It may be provided on the conveying roller 13 of the squeeze section 21 close to 2, and may be provided on all or part of the conveying roller 13 disposed in the developing tank 16, the fixing tank 18, and the washing tank 20, or from one processing tank to the next processing tank. All or part of the transport rollers 3 provided in a crossover rack (not shown) that transports the film 12 to
may be provided.

〔Effect of the invention〕

As explained above, in the driving force transmission device for the conveyance roller for an automatic processor according to the present invention, the driving force transmission device is provided between the roller and the rotating shaft, so that the clutch portion does not protrude to the outside of the side plate. The racks can be reliably attached to each other, and the film can be transported stably. Furthermore, the roller pair can separate from the rotation shaft and rotate idly without being interfered with by the rotation shaft that transmits rotational force, so even if the film moves faster than the rotation speed of the roller pair, the film held between the roller pair It won't hurt you.

[Brief explanation of drawings]

Fig. 1 is a schematic structural diagram showing an automatic developing machine, Fig. 2 is a sectional view showing a state in which a driving force transmission device is attached to a pair of rollers, and Fig. 3
The figure is an exploded perspective view showing a driving force transmission device for a conveying roller for an automatic developing machine according to the present invention, and FIG. FIG. DESCRIPTION OF SYMBOLS 10... Automatic developing machine, M... Drive force transmission device, 36... Roller, 44... Clutch, 46... Winding means (spring), 48... Clutch desk.

Claims (1)

[Claims] A driving force transmission device for a conveying roller for an automatic developing machine that transmits the driving force of a driving means to a conveying roller and develops the photosensitive material while conveying the photosensitive material along a predetermined conveying path along the conveying roller, A cylindrical roller that is supported by a rotation shaft of a transport roller and can rotate relative to the rotation shaft, a clutch that rotates integrally with the rotation shaft, and a clutch that is fixed to the roller and is applied with rotational force in the photosensitive material transport direction. desk and
A driving force transmission device for a conveyance roller for an automatic developing machine, comprising a winding means that is wound across the clutch and the clutch disk and transmits the rotational force of the clutch to the clutch disk by a winding force.