JPS6016913Y2 - Film transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film transport device in a film processing machine such as an automatic film processor, and particularly relates to an improvement of a film transport device that is optimal when the film to be processed is relatively wide.

2. Description of the Related Art Automatic film processors are generally known in which an exposed film is sequentially conveyed to a developing tank, a fixing tank, a washing tank, etc. which are arranged side by side, and predetermined processing is automatically performed in each of them.

Various types of film transport devices for such automatic film processors have been developed and put into practical use, but one of the representative ones is a roller transport system in which only rollers are combined along the film transport path to be processed. It is a method.

In such a roller conveyance system, when the width of the film to be processed is relatively wide, for example, 106.7 cm to 157.5C71 (42 inches to 62 inches), each roller needs to have a length that is longer than the width of the film to be processed. If a roller of such length is mechanically supported at its ends, the roller will be distorted between the support points due to its own weight, creating a large pressure difference across the width of the film being sandwiched and conveyed between the rollers. arise.

In general, films to be processed, especially films for gravure plate making, are often pressure-sensitive, and such pressure differences cause uneven development. It was considered difficult to apply it to devices.

On the other hand, in order to solve such difficulties, for example,
A conveying device as shown in No. 32132 has been proposed.

FIG. 1 is a cross-sectional view showing the outline of the film conveying device described in Japanese Patent Publication No. 48-3213 Yume, in which 1 is a pair of roller supports attached to the side plate of a developer tank, 2
A main drive roller is immersed in the developer and horizontally supported on the side plate of the developer tank, and is rotated in the direction of the arrow by an appropriate drive source provided outside the tank.

Reference numeral 3 denotes an idle roller that comes into contact with the main drive roller 2. Both ends of the shaft 4 of the roller 3 are slidably accommodated in slots 5 provided diagonally downward in the support body 1, so that the roller 3 is half of the automatic drive roller. It is in contact with the main drive roller 2.

6 is a spray tube for circulating a processing liquid; 7 and 8 are guide plates forming a film transport path; and 9 is a film to be processed.

The main drive roller 2 in such a film transport device is
As shown in a partial cross-sectional view in FIG. 2, both ends of the hollow space are sealed with airtight support columns 2a and 2b, and when immersed in a fluid such as a developer, the entire length of the roller 2 is covered. The resulting buoyant force cancels out its own weight and prevents the roller 2 from being distorted between the support points.

The idle roller 3 also has the same structure as the main drive roller 2, but since the roller 3 has a weight slightly larger than the buoyant force applied to the roller 3, it comes into contact with the main drive roller 2 due to gravity.

A conveyance device with such a structure eliminates or alleviates the difficulties encountered when applying the roller conveyance method to a device that processes wide-width films as described above, but it also poses inconveniences when performing maintenance and inspection of various conveyance devices. be.

That is, when it is necessary to clean each component roller at the time of maintenance and inspection, the conveying device as shown in FIG. 1 has the disadvantage that it is troublesome and time-consuming to remove each idler roller 3, 3, . . . .

The object of the present invention is to provide a wide-width film conveying device that eliminates such inconveniences, and will be detailed below with reference to the drawings.

FIG. 3 shows a sectional view of the film conveying device according to the present invention, and the same reference numbers as in FIG. 1 indicate the same components as in FIG. 1.

In the figure, reference numeral 10 denotes an idler roller having almost the same structure as the idler roller 3 of FIG. 1, and as shown in the perspective view of FIG.
The arm 12.
The other end of 12 is attached to a shaft 13, for example, to a side plate (not shown) of the developer tank so that the idler roller 10 can rotate in a cantilevered manner.
Supported by

14 and 15 are easily removable outer and inner guide plates.

However, in the film conveying device according to the present invention, the idler roller 10 supported in a cantilevered manner by the shaft 13 is brought into contact with the main driving roller 2 with its own weight without distortion such as slack between supporting points, and is driven by the idler roller 10. By rotating, the film to be processed 9 is conveyed while being sandwiched between the main drive roller 2 and the idler roller 10.

Moreover, in the film conveying device according to the present invention, as shown in FIG. 5 during maintenance and inspection, by removing the outer guide plates at required locations and rotating the idler roller 10 from the position shown by the dotted line to the position shown by the solid line, , each roller can be easily inspected, cleaned, etc.

In the embodiments of FIGS. 3 and 5, the topmost pair of idler rollers 10.
Unlike the 0.10, the shaft 13 for rotatably supporting the roller 10 is placed diagonally below the force button 10, but there is no particular meaning and it should be unified to either one. As described above, the film transport device according to the present invention does not cause processing unevenness such as uneven development even when transporting and processing a relatively wide film to be processed, and also requires zero maintenance and inspection of each roller. It has practical advantages such as being very easy to perform.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a film transport device suitable for transporting and processing a relatively wide film to be processed;
FIG. 2 is a partial sectional view of the main drive roller shown in FIG. 1, FIGS. FIG. 6 is a perspective view showing the idler roller used in FIG. 5; 1...Roller support body, 2...Main drive roller 3.10...Idle roller 5...
...Slot, 6...Spray tube,?
, 8, 14. 15... Guide plate, 9...
- Film to be processed, 12...Arm.

Claims (1)

[Scope of utility model registration request] A plurality of main drive rollers are supported in the vertical direction within the processing layer and are pivoted so as to be rotated by an appropriate drive source, and a plurality of pairs of play rollers are provided in contact with each type of drive roller and rotated as driven. each idler roller is pivotally supported by an arm that is cantilevered and rotatably supported on a shaft separate from the idler roller shaft, and each idler roller is brought into contact with each corresponding main drive roller. A film conveying device characterized by: