JPH0134187Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention develops photographic film that has already been photographed.
The present invention relates to a film conveying device that sequentially conveys the film through processing zones in a processing device that performs processes such as fixing, washing, and drying.

This type of film transport method can be roughly divided into one in which a long leader film is passed through the entire processing process in advance, the end of the film to be processed is connected to the rear end, and the leader film is wound up from the leading end. Then, a short leader film is sequentially fed to the next feed roller or sprocket while bending, using a large number of feed rollers or sprockets arranged at intervals shorter than the length of the leader film along the conveyance path of all processing steps. There is something. However, the former method, which uses a long leader film, is unsuitable for the need to frequently process short photographic films individually because the leader film is wound up for each processing step. be. In this respect, the latter so-called shot leader method is advantageous, but in this case, it is essential that the leader film is sequentially reached to the position of the next feed roller, etc. by a feed roller or sprocket, so the processing equipment Not only does this require an extremely large number of feed rollers, etc., but the drive mechanism for driving each of them is also complicated, and the number of parts increases, resulting in an increase in cost.

This invention was made for the purpose of further improving the above-mentioned drawbacks in a short leader type film transport device using a short leader film.

That is, this invention uses an endless band having a large number of feed protrusions on its back surface or outer surface, runs the endless band in continuous rotation, and fits the feed holes provided in the leader film into the feed protrusions on the back surface. By doing so, the photographic film connected to the rear end of the leader film can be conveyed in conjunction.

More specifically, in each processing zone such as development, fixing, washing, drying, etc., endless bands having a large number of feeding protrusions on the outer surface at intervals along the length direction are arranged facing each other. The leader film is suspended between a pair of pulleys so that it can rotate continuously, and the leader film is connected to photographic film on both sides of one end to cooperate with each other. The present invention provides a film conveyance device for a photographic film processing apparatus, characterized in that a plurality of feed holes into which feed projections are fitted are arranged in a row at intervals.

This will be further explained below based on illustrated embodiments.

FIG. 1 is a side view showing an outline of a photographic film processing apparatus, in which 1 is a film box, 2 is a film insertion box, 3, 4, 5, 6, 7, 8,
9 and 10 are processing zones arranged in series for development, fixing, washing, drying, etc.; 11 is a drive box; 12
is a processed film ejection table. Each processing zone has a pair of pulleys 1 facing each other.
3 is disposed, and an endless belt 14 for conveyance is suspended from this, and the photographic film 16 can be conveyed in cooperation with the leader film 15 by the conveyance action of this endless belt.

The structure of this conveying device is shown in detail in FIGS. 2 to 6. As shown in these figures, the endless band 14 is made of a toothed belt made of synthetic resin and has teeth 17 on its inner circumferential surface, but there are also a large number of toothed belts on the outer surface at predetermined intervals in the length direction. The feeding protrusions 18 are integrally protruded. Therefore, the pulley 1 on which the endless belt 14 is suspended
3, a toothed pulley that meshes with the teeth 17 is used. and a pair of pulleys 1
3 and 13 are attached to the center of shafts 20 and 20 that are horizontally suspended between both ends of the left and right side plates 19 and 19, and one of them is attached to a drive sprocket 21 that is attached to one end of the shaft 20. The endless belt 14 is rotated by power from the film conveyor, and is configured to rotate and run the endless belt 14 continuously in a predetermined film transport direction.

On the other hand, the leader film 15 has a width more than twice that of the photographic film 16, and can connect the photographic film 16 in two rows through appropriate connecting members 22 on both sides of one end thereof. A feed projection 1 on the outer surface of the endless band 14 is provided at the center in the width direction.
8, a large number of feed holes 2 into which these are fitted.
3 are arranged in a row at predetermined intervals. The leader film 15 is in a state in which both side edges thereof are fitted into the leader guide grooves 24, 24 formed in the side plates 19, 19, and the feed protrusion 18 and the feed hole 23 are fitted together. As a result, as the endless belt 14 travels, the photographic film 16 that is connected to the trailing end of the endless belt 14 can be pulled and conveyed in conjunction with the photographic film 16.

In addition, in the figure, reference numeral 25 indicates a leader pressing guide member disposed outside along the leader film 15 in order to prevent the leader film 15 from separating outward from the endless band 14; reference numerals 26 and 27 indicate a squeezing roller;
28 is a drum-shaped turn roller, and 29 and 30 are upper and lower turn guides. Although the guide member for preventing the photographic film 16 from meandering during transportation is omitted in the drawings, it is appropriately provided in accordance with a conventional transportation device.

In the illustrated embodiment, the endless band 14 is shown to be a toothed belt made of synthetic resin.
As long as the feed protrusion 18 is provided on the outer surface, it can be replaced with another belt or chain.

As mentioned above, this device transports the photographic film connected to the trailing end by fitting the feed hole of the leader film with the feed protrusion on the outer surface of the endless band suspended between the pair of pulleys. Since the leader film is always in engagement with the endless belt, there is no risk of slipping between the rollers and the leader film as in the case of conventional short leader conveying devices, and the film can be moved more safely and reliably. In addition to being able to carry out conveyance, the leader film can be further shortened and film processing capacity can be improved. In addition, since it is sufficient to drive only the pulley at one end of the endless belt to drive it, the number of drive rollers or drive sprockets can be greatly reduced compared to the conventional opposed roller conveyance system or sprocket conveyance system. There are significant advantages such as not only the drive mechanism can be simplified, but also the number of parts can be significantly reduced and costs can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a side view showing an outline of a photographic film processing device;
Fig. 2 is a front view of the film transport device, Fig. 3 is a longitudinal sectional view thereof, Fig. 4 is a partial perspective view thereof, and Fig. 5 is a front view of the film conveying device.
The figure is a cross-sectional view taken along the line of FIG. 2, and FIG. 6 is a cross-sectional view taken along the line of FIG. 3, 4, 5, 6, 7, 8, 9, 10... Processing zone, 13... Pulley, 14... Endless belt for conveyance, 15... Leader film, 16... Photographic film, 18... Feeding Projection, 23... feed hole.

Claims (1)

[Claims for Utility Model Registration] (1) In each processing zone such as development, fixing, washing, drying, etc., an endless strip having a large number of feeding protrusions on the outer surface at intervals along the length direction, A center portion in the width direction of a leader film which is suspended between a pair of pulleys arranged so as to be continuously rotated, and which connects photographic film to both sides of one end to cooperate with each other. A film transport device for a photographic film processing apparatus, characterized in that a plurality of feed holes into which the feed protrusions fit are arranged in a row at intervals. (2) A film transport device in a photographic film processing apparatus according to claim 1, wherein the endless band is a toothed belt made of synthetic resin.