JPH07128835A - Photographic sensitive material carrying device - Google Patents

Abstract

PURPOSE:To provide a carrying device whose structure is simple and compact, in which films are prevented from being rubbed each other in the case of forming loop, and also the attachment/detachment of a loop tank is easily performed. CONSTITUTION:This device is provided with loop guides 5a and 5b which freely slidably support the both end faces of a film F and which can release supporting, a pair of front and back driving rollers capable of being driven independently of each other, and loop rollers 10a, 10b, 10c, and 10d moved so as to be interposed between the beginning and the end of the loop part in the case the loop part is detected by a detecting sensor 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic photosensitive material conveying device (hereinafter referred to as a conveying device) in a photographic photosensitive material processing device (hereinafter referred to as a processing device). More specifically, the present invention relates to a conveying device that bends a photographic light-sensitive material such as a photographic film (hereinafter referred to as a film) and conveys it while forming a loop portion.

[0002]

2. Description of the Related Art When continuously processing a film such as development and printing, it is necessary to sequentially transfer the film at a transfer speed suitable for each process.

For example, the film is moved at a constant speed in the developing process in the processing apparatus, and the film is moved in the baking process at a constant speed.
The frame is moved intermittently, but in order to smoothly convey the entire film, it is necessary to correct the difference in the conveying speed between the steps.

In order to correct such a difference in the transport speed between the processes, conventionally, a transport device attached between the processes forcibly forms a loop portion on the film, and the transport speed is increased and contracted by the expansion and contraction of the loop portion. There is a way to absorb the difference.

As shown in FIG. 4, a conventional conveying device having a loop forming mechanism has front driving rollers 31a and 31b and rear driving roller 32 provided along a conveying direction A.
A loop guide 33 is provided on the lower surface of the film F in order to guide (pass the film) the film F between a and 32b.

As shown in FIG. 5, the loop guide 33 is provided with a plurality of rollers 36 arranged between two arms 35 on the same plane, and a shaft 37 extends on one side surface of the arm 35. The shaft 37 is pivotally supported by the bracket 38. By rotating the shaft 37 in the B direction (or C direction) with a solenoid or the like, the arm 35 swings downward (or upward), and the direction of the group of rollers 36 can be changed horizontally or downward.

When a loop portion is formed on the film F by using the transport device shown in FIG. 4, the front (downstream) drive roller is used.
31a and 31b are stopped, and the rear side (upstream side) drive roller 32
Only a and 32b are driven to bend the film F. At the same time, the shaft 37 is rotated about 90 ° in the B direction, and the loop guide 33 is tilted downward.

At this time, the film F is bent between the front drive rollers 31a and 31b and the rear drive rollers 32a and 32b, and the loop portion L is formed by its own weight. The formed loop portion L is housed in the loop tank 39.

Further, inside the loop tank 39, a film switching mechanism is provided to regulate the width of the film F so that the film F is not twisted in the loop tank 39.

As shown in FIG. 6, in the film switching mechanism, a pair of guide plates 42 and 43 are formed inside a case 41 so that shafts 44 and 45 and screws are formed on the surface so that they are parallel to each other. It is supported by the screw shaft 46.

When the type of film being conveyed is changed, a change in film size (for example, from 110 size to 135 size or vice versa) is detected by a sensor (not shown), and the width switching motor 47 is driven. Then, the screw shaft 46 is rotated via the belt 48 and the pulley 49.
At this time, one guide plate 42 is brought closer to or farther from the other guide plate 43, so that the film F
The guide width G for guiding the is adjusted.

[0012]

However, the transport device drives the movable loop guide 33 for changing the direction of the group of the guide rollers 36 to form the loop portion L of the film F. This requires a solenoid to operate, the entire mechanism becomes complicated and large, and it becomes difficult to save space.

Further, when the loop portion L is formed, the deflection of the film F becomes large and the films of the loop portion L rub against each other, which causes a problem that the image portion of the film is damaged.

Further, the loop tank is fixed to the lower part of the drive unit with screws or the like, but since the loop tank is provided with a film switching mechanism, the loop tank becomes complicated and large, and the loop tank is When desorption,
It is necessary to perform wiring work for the electrical components such as the width switching motor 47 and the sensor that form the film switching mechanism, which makes it difficult to attach and detach the loop tank, which makes maintenance difficult.

The present invention has been made to solve the above problems, and provides a transporting device which is simple and compact, which can prevent the films from rubbing when forming a loop, and can facilitate the attachment and detachment of the loop tank. The purpose is to do.

[0016]

SUMMARY OF THE INVENTION A conveying device of the present invention comprises a loop forming mechanism for bending a photographic light-sensitive material in a loop and a loop tank for accommodating the loop. The loop forming mechanism is a loop guide that can slidably sandwich both end portions of the photographic light-sensitive material, and is provided separately from each other along the moving direction of the photographic light-sensitive material. It is characterized in that it is composed of a pair of driven photographic material conveying members, and a loop intrusion member provided between the photographic material conveying members.

Further, it is preferable that the loop guide is constructed so as to be swingable between a position for holding the photographic light-sensitive material and a position for releasing the holding in the loop forming direction.

Further, it is preferable that the member for penetrating the loop is constructed so as to be able to move into the loop when the formation of the loop of the photographic light-sensitive material is detected in the loop tank.

Further, the loop tank has a gutter-shaped guide formed on the bottom surface thereof such that the distance increases upward from the bottom portion where the distance is narrower than the width of the photographic light-sensitive material. Is preferred.

[0020]

According to the present invention, since the guided film is guided by the loop guides slidably holding the both side edges of the film, a movable film switching mechanism or the like is not particularly required and the structure is simple. And space saving is achieved.

The loop formation of the film is performed by releasing the holding of the film by the loop guide, stopping the front side of the pair of film conveying members, and conveying the film only on the rear side. Then, if the film bends into the loop tank in a loop shape, rubbing between the films forming the loop is prevented by the intrusion of the intrusion member in the loop.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the carrying device of the present invention will be described in detail with reference to the drawings. 1 is a partially cutaway front view showing an embodiment of the carrying device of the present invention, FIG. 2 is a view P of the carrying device of FIG. 1, and FIG. 3 is an operation explanatory view of the carrying device of FIG.

As shown in FIG. 1 and FIG. 2, the transport device accommodates the loop forming mechanism 1 for forming a loop portion on the film F and the loop portion L of the film F provided below the loop forming mechanism 1. It is composed of a loop tank 2 and a loop detection sensor 3 provided between the loop forming mechanism 1 and the loop tank 2.

The loop forming mechanism 1 is constructed as follows. That is, the two loop guides 5a and 5b are swingably provided at the lower part of the arm 4 extending perpendicularly to the transport direction D of the film F on the loop tank 2 so as to be swingable symmetrically with respect to the transport direction D. Are attached, and first solenoids 6a and 6b are provided below the loop guides 5a and 5b. A fixed shaft 7 is provided on the arm 4 perpendicularly to the transport direction D, and a bracket 8 is attached to the fixed shaft 7 via a bearing 9 so as to be rotatable above the film F. Four loop rollers 10a, 10b, 10c and 10d are rotatably provided on the bracket 8 (these 8, 10a, 10b, 10c and 10d are loop penetration members referred to in the claims). ). The bracket 8 and the bearing 9 rotate by receiving a driving force from the second solenoid 12 via the transmission belt 11. Furthermore, two drive rollers 1 for film transport that are driven to rotate by a motor, etc.
3, 14 are provided separately along the transport direction D.
The drive rollers 13 and 14 have a right cylindrical shape, and can transport the film F at a desired transport speed without slipping.

The loop rollers 10a, 10b, 10c, 10d
Does not damage the film F even if it contacts the film F. For example, a roller whose surface is made of Teflon is preferably used.

The loop tank 2 is made with a width S of about 40 mm so that it can be sufficiently accommodated even if the film size is different, such as 110 and 135. The loop tank 2 is fixed to the lower part of the loop forming mechanism 1 with a screw or the like.

Furthermore, at the bottom of the loop tank 2, so that the screen portion f1 of the film F does not touch the bottom of the tank,
A gutter-shaped guide 15 is provided. Guide 15 is about 20mm
A pair of flanges 15b are provided on both end surfaces of a bottom plate 15a having a width of approximately the same so that the distance between the bottom tank 15a and the bottom tank 15a is increased in the upward direction.
Is extended to the bottom of the.

The loop detection sensor 3 includes two drive rollers.
It is a sensor that detects the presence or absence of the loop portion L in the section between 13 and 14, and detects the loop portion L when the lower end of the loop portion L extends downward and moves below the height of the loop detection sensor 3. The operation of the second solenoid 12 is controlled.

In the transport device constructed as described above, the guide pressers 17a and 17b attached to the tips of the plungers 16a and 16b of the first solenoids 6a and 6b lift the loop guides 5a and 5b to lift the film F. Both ends are respectively on the lower surface of the arm 4 and the loop guides 5a and 5a.
The film F is slidably supported between the claw portions 18a and 18b at the tip of b, and the film F is guided along the transport direction D. The guide retainers 17a and 17b are directly connected to the loop guides 5a and 5b.
The damper effect is obtained by interposing the contact plates 19a and 19b instead of lifting b.

Next, the process of forming the loop portion L on the film F using the transport device of FIG. 1 will be described with reference to FIGS.
A description will be given using (a) and (b).

First, in the film passing state of FIG. 3 (a), the both end portions of the film F have the loop guides 5a and 5a.
The film F is slidably supported by b, and the driving rollers 13 and 14 are driven at the same rotation speed, so that the film F is conveyed in the conveying direction D.
Are conveyed on a substantially straight line. At this time, the loop rollers 10a, 10b, 10c, and 10d stand by at the separated positions above the film F.

When forming the loop portion L, first of all,
The loop guides 5a and 5b are lowered by turning off the solenoids 6a and 6b. Then, the front drive roller 13 is stopped and only the rear drive roller 14 is driven to form the loop portion L of the film F below the arm 4. The loop portion L is housed inside the loop tank 2 (see FIG. 3B). At this time, if the driving roller 14 on the rear side is continuously driven, the loop portion L becomes larger in the downward direction, and finally the lower end of the loop portion L passes below the position of the loop detection sensor 3. At this time, the loop detection sensor 3 detects the presence of the loop portion L, operates the second solenoid 12, and rotates the bracket 8 in the E direction. Thereby, the loop rollers 10a, 10b, 10c, 10d
Can be interposed in the loop portion L, and the films F can be prevented from rubbing against each other.

When the loop portion L is maximum, both end portions of the lower end of the film F are in line contact with the collar portion 15b of the guide 15 to prevent the screen portion f1 of the film F from contacting the bottom surface of the loop tank 2. The screen portion f1 is prevented from being damaged.

After that, even if the two drive rollers 13 and 14 are rotationally driven at a predetermined transport speed, the difference in the transport speed of the film F can be absorbed by the loop portion L.

When returning to the film passing state of FIG. 3A again, the driving roller 14 on the rear side is stopped,
By driving only the drive roller 13 on the front side, the loop portion L of the film F can be eliminated. When the lower end of the loop portion L is above the position of the loop detection sensor 3, the loop detection sensor 3 detects that the loop portion L is gone, operates the second solenoid 12, and moves the bracket 8 in the opposite direction. The loop rollers 10a, 10b, 10c and 10d are rotated to return to the initial position, and a series of operations is completed.

The maximum length of 110 size film is 24
Because it is a top, it does not reach the bottom of the loop tank 2,
The guide 15 may not be provided.

[0037]

According to the present invention, simplification and space saving of the transporting device can be achieved, rubbing of the screen portion between the films can be prevented, and the work for attaching and detaching the loop tank can be facilitated. You can

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a carrying device of the present invention.

FIG. 2 is a P view of the carrying device of FIG.

FIG. 3 is an operation explanatory view of the transport device of FIG.

FIG. 4 is a front view of a conventional transfer device.

5 is a perspective view of the loop guide in FIG.

FIG. 6 is a perspective view of a conventional film switching mechanism.

[Explanation of symbols]

 1 loop forming mechanism 2 loop tank 3 loop detection sensor 4 arm 5a, 5b loop guide 6a, 6b 1st solenoid 10a, 10b, 10c, 10d loop roller 12 2nd solenoid 13 drive roller 14 drive roller 15 guide 15a bottom plate 15b collar part 18a, 18b Claw part F film L loop part

Claims (4)

[Claims] 1. A photographic light-sensitive material conveying device comprising a loop forming mechanism for bending a photographic light-sensitive material into a loop and a loop tank for accommodating the loop, wherein the loop forming mechanism is a photographic material. A loop guide capable of slidably sandwiching both end portions of the photosensitive material, and a pair of photographic photosensitive material conveying members which are independently spaced from each other and are provided along the traveling direction of the photosensitive material. A photographic material transporting device comprising: a member for penetrating a loop provided between the photographic material transporting members. 2. The photographic light-sensitive material according to claim 1, wherein the loop guide is configured to be swingable between a position for holding the photographic light-sensitive material and a position for releasing the holding in the loop forming direction. Transport device. 3. The photograph according to claim 1, wherein the member for penetrating the loop is configured so as to be able to move into the loop when the formation of the loop of the photographic light-sensitive material is detected in the loop tank. Photosensitive material transport device. 4. The loop tank has a gutter-shaped guide formed on the bottom surface thereof such that the distance increases upward from a bottom portion having a distance smaller than the width of the photographic light-sensitive material. Item 1. A photographic light-sensitive material conveying device according to item 1.