JPS6232461A - Photosensitive material guide structure for developing device - Google Patents

Abstract

PURPOSE:To guide surely photosensitive materials and to improve the contact between them and a developer by allowing a pair of guide members to face each other and using them to guide both side parts of photosensitive materials and providing slits for passage of both side parts of photosensitive materials and providing notches for flow of the developer in leg parts facing them. CONSTITUTION:After the carrying direction of a photographic paper 14 subjected to printing work is changed, the paper 14 is fed between feeding rolls 28 and 30. The paper 14 is fed between feeding rolls 28A and 30A while having the non-emulsion face brought into contact with leg parts 34B and 36B of guide members 34 and 36, thus preventing the damage of the emulsion face. Though the front end part of this paper 14 is brought into contact with leg parts 34A and 36A, the front end part of the paper 14 is not caught by notches 40 because notches 40 do not reach bottom faces of slits 37. Since the developer passing between guide member 34 and 36 and notches 40 is sufficiently brought into contact with the photographic paper 14 fed between guide members 34 and 36, sure development processing is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a photosensitive material guiding structure for a developing device that is used in a developing device for a photosensitive material after exposure and guides the photosensitive material within the developing device.

[Background technology and matters to be solved]

Photographic paper, which is an example of a photosensitive material, is sent to a developing device after an image is exposed to light.

In this developing device, the photographic paper is fed between a plurality of feed rollers, subjected to development processing while being immersed in a processing liquid, and then sent to the next step.

In a general photographic paper guide structure, the photographic paper is sequentially fed between a plurality of pairs of rollers, and the photographic paper is brought into contact with a developer between these rollers to perform a developing process.

However, when the leading edge of photographic paper guided between multiple pairs of rollers moves, it is necessary to reliably guide it to between the next rollers after being pushed out between the pair of rollers. For this reason, if a guide member is provided to guide the photographic paper between the plurality of pairs of rollers, the photographic paper passing between the guide members will not come into sufficient contact with the developer.

The present invention takes the above-mentioned facts into account, and makes it possible to reliably guide the photosensitive material even when guiding the photosensitive material between multiple pairs of rollers, and to ensure contact with the developer between these rollers. The purpose is to obtain a photosensitive material guiding structure for a developing device that can be used.

[Summary and operation of the invention]

In the guide structure according to the present invention, a pair of guide members are opposed to each other for guiding the photosensitive material on both sides, and these guide members are provided with slits for passing the photosensitive material on both sides, and the legs facing the slits are provided with slits for passing the photosensitive material on both sides. It is characterized by having a cutout for developer solution circulation.

Therefore, in the present invention, the photosensitive material moving between the plurality of pairs of rollers can be reliably fed to the next roller by being guided by the guide member on both sides in the width direction. Since only the photosensitive material is guided by the guide member, the central part in the width direction can sufficiently come into contact with the developer, and the notches provided in the guide member ensure that both sides of the photosensitive material in the width direction can also come into contact with the developer. It has become.

By forming the notches of this guide member to be shallower than the depth of the slits for guiding both sides of the photosensitive material, it is possible to smoothly guide the leading end of the photosensitive material without getting caught in the notches during conveyance.

[Embodiments of the invention]

1 to 5 show a configuration in which this embodiment is applied to a rack means 12 that is immersed in a developer in a developer bag W10. That is, this development zzt.

The photographic paper 14 that has been exposed to light by the printer is fed in while being guided by the bending guide plate 15, guided by the rack means 12 and immersed in the developer tank 16, then reversed into a U-shape and pulled out. After drawing the trajectory of the letter, it is sent to the next processing tank 1B.

The rack means 12 is placed between a pair of opposing side plates 20 and 21 as shown in FIG. Several support rods 22 are connected to each other, and the support rods 2 protrude from the side plates 20.21.
The pair of side plates 20 and 21 are fixed to each other at a predetermined interval by screwing a nut 24 into the tip of each side plate 20, 21. For this purpose, a gap 26 is provided in the middle of the support rod 22 for contacting one side of the side plate 20.21.

A feed roller 28 is pivotally supported near the upper ends of the side plates 20, 21 at the center in the width direction. Feed rollers 30, 32 are pivotally supported adjacent to this feed roller 28, and each abuts the feed roller 28 from the opposite side of the feed roller 28. These feed rollers 30, 32 are the feed rollers 28
It is smaller in diameter than the

Immediately below the feed roller 28 are feed rollers 28A, 28B,
28C128D are pivotally supported on the side plates 20, 21 at equal intervals, and these are provided with feed rollers 30A, 30B,
30C and 30D are directly below the feed roller 30, and feed rollers 32A, 32B, and 32C132D are directly below the feed roller 32 and are supported by the side plates 20 and 21, respectively.

A straight line connecting the axes of the feed rollers 28A to 28D is parallel to the conveyance direction of the photographic paper 14 (direction of arrow A).

Sent out from the feed roller 28.30 and sent to the feed roller 28
Guide members 34, 36 are mounted on the side plates 20, 21, respectively, for guiding the photographic paper 14 to A, 30A. These guide members 34, 36 extend from both sides of the legs 34A, 34B and 36A, 3 as shown in FIG.
6B are protruded parallel to each other to form a U-shape in plan view, and a photographic paper passing slit 37 is formed in the center to guide both sides of the photographic paper in the width direction.

The guide member 34 is for attachment to the side plate 20, and the guide member 36 is for attachment to the side plate 20.
is for attachment to the side plate 2, and a female thread 35 is cut for this attachment. The guide plates 34 and 36 are arranged so that the slits 37 face each other, and the space between the guide members 34 and 36 is a passage for the developer, so that the developer can effectively contact the photographic paper 14 being conveyed. It has become.

The legs 34A, 36A on the outside of the guide members 34, 36, that is, closer to the feed roller 30 than the feed roller 28, have slopes 38 that increase the width of the slit 37 toward the tip end.
When the leading end of the photographic paper 14 is conveyed, the photographic paper is reliably guided to the slit 37 so that the leading end does not get caught inadvertently.

Further, the legs 34A and 36A have a plurality of approximately V-shaped holes from the tip.
Letter-shaped notches 40 are formed at predetermined intervals to allow the developer to pass through appropriately even near the widthwise ends of the photographic paper 14 guided within the slits 37. The cutting depth of these notches 40 is smaller than the depth of the slit 37, and therefore there is no notch of dimension L (FIG. 2) between the bottom surfaces of the slits 37. This prevents both sides of the leading end of the photographic paper 14 from getting caught in the notch 40 even when the leading end of the photographic paper 14 moves within the slot 37.

These guide members 34, 36 are arranged not only between the feed roller 30 and the feed roller 30A, but also between other pairs of rollers, so as to guide both sides of the photographic paper 14. However, the first roller is sent out from between the feed roller 28D and the feed roller 32D, guided between the plurality of roller pairs, and directed upward between the feed roller 28 and the feed roller 32.
For photographic paper fed out in the direction of arrow B in the figure, the leg plate 3
4A and 36A are arranged toward the outside of the rack means 12. For this reason, the notch 40 is always
The emulsion side of 4 can be handled.

The feed rollers 30 to 30D are arranged with their axes slightly lower than the feed rollers 28 to 28D, and conversely, the feed rollers 32 to 32D are arranged at a position slightly lower than the feed rollers 28 to 28D, respectively.
The axis is located slightly above D.

For this reason, the photographic paper 14 sent out between the feed rollers 28 and 30 is biased from the photographic paper transport direction (input direction) and directed toward the leg portion 34B of the guide plate 36. Similarly, the photographic paper 14 fed out from between the feeding rollers is also oriented in the direction of the tentative guide 36. For this reason, one side of the photographic paper 14 that is sent out always comes close to or comes into contact with the guide plate 36, and the other side does not come into contact with the feeding roller 34 until it reaches the next pair of rollers. .

Therefore, by setting the other side as the emulsion surface side, it is possible to eliminate the problem of the emulsion surface coming into contact with the guide plate 34 between the roller pair.

A folding roller 44 is provided below the feeding roller 28D and is in contact with the feeding roller 28D, and the axis of the folding roller 44 is arranged at the same distance as the axis of the feeding rollers 30D and 32D. .

A folding guide plate 45 is disposed between the folding roller 44 and the feeding rollers 30D and 32D over the entire width direction of the trajectory of the photographic paper 14 being conveyed, and both ends thereof are connected to the side plate 20.
．． 21 and has an arcuate shape when viewed from the axial direction of the folding roller 44. Therefore, these folding guide plates 45 guide the photographic paper sent out from between the feeding rollers 28D and 300 to the feeding rollers 28D and the folding rollers 4.
4, this feed roller 28D, and the folding roller 4.
The photographic paper sent out from 4 is sent to feed rollers 28D and 32D.
It is designed to guide you to each.

As shown in FIG. 8, the feed roller 28C and the feed roller 30C132C have small diameter portions 42.43 at both ends in the axial direction.
is formed. These small diameter portions 42, 43 correspond to both widthwise sides of the conveyed photographic paper 14, and weaken the clamping force on both widthwise sides of the conveyed photographic paper 14.

That is, the photographic paper 14 is fed by the feed rollers 28, 30, 28A,
30A and the feed rollers 28B and 30B, the passage time in the developer tank 16 becomes longer, so a swollen portion absorbing the developer is formed near both measuring portions. If this swollen part is held under a large pressure like the center part in the width direction, the developer will soak in and change the quality, causing stains on the edges. In order to prevent this, the small diameter portions 42, 43 reduce the clamping pressure on this swollen portion so that the developer can be delivered without seeping into the edges of the photographic paper. The diameter of this small diameter portion 42.43 is 0.1 to 0.5 mm different from that of the center portion in the width direction.

Note that the feed rollers 28 to 28B and 30 to 30B do not have small diameter portions at both ends in the axial direction, but the feed rollers 32 and 32
Similar to the feed roller 32C in FIG. 8, A has small diameter portions at both ends in the axial direction to weaken the clamping force between the two measurement portions of the photographic paper which rises in the direction of arrow B after being folded by the folding roller 44. By doing this, it is ensured that the progress of development of the amount of chaff is uniform without causing any unevenness in development, and stains due to the seepage of the developer due to subsequent swelling of the edges are also prevented. In this case, since the feed rollers 28.28A and 28B do not have small diameter portions, the small diameter portions of the feed rollers 32.32A and 32B have a dimensional difference that is approximately twice as large as that of the feed roller 32C compared to the center portion in the width direction. It is preferable to give it.

One end of the feed rollers 28 to 28D protrudes from the side plate 20,
As shown in FIG. 3, gears 46 are fixedly attached to each gear, and a chino 48 is connected to each gear. Further, as shown in FIG. 5, a gear 50 is fixed to the end of the feed roller 28 protruding from the side plate 21, and a gear (not shown) driven by a drive device (not shown) meshes therewith. . This gear 50 has feed rollers 30 and 32.
Gears 52 and 54 fixed to the ends of are in mesh with each other,
The feed rollers 30, 32 are adapted to rotate at the same rotational speed as the feed roller 28 and in the opposite direction.

The gears 50, 52, 54 are also fixed to the feed rollers 28, 30, 32 provided below the feed rollers 28, 30, 32, and the three groups of feed rollers that are in contact with each other rotate in opposite directions at the same rotational speed. It is designed to be rotated. Further, a gear 56 is fixed to the folding roller 44 at the lower end, and meshes with the gear 50 fixed to the feed rollers 30D and 32D to rotate in the opposite direction at the same rotational speed as the feed roller 28D. .

In this way, the feed rollers 28 to 28D and the feed rollers 30 to
32D, the photographic paper 14 is conveyed downward in the direction of arrow A within the developer tank, and between the feed rollers 30D and 32D, it is reversed into a U-shape by being held between the feed roller 28D and the folding roller 44. ~28D and feed roller 3
By interlocking with 2 to 32D, it receives a driving force to be conveyed upward in the direction of arrow B.

As shown in FIG. 4, the shaft support holes for the feed rollers 30 to 30D and feed rollers 32 to 32D formed in the side plate 20.21 are elongated holes 57 whose longitudinal directions face the feed rollers 28 to 28D, respectively. ing.

Therefore, these feed rollers 30 to 30D, feed roller 3
2 to 32D can come into contact with and separate from the feed rollers 28 to 28D, and as shown in FIG.
Between feed rollers 30A and 32A, feed rollers 30B and 32
An endless tension spring ring 58.59 is wound around the outer side of the side plate 20.21 between the space B and between the feed rollers 30D and 32D, thereby receiving a biasing force in the direction of contacting the feed rollers 28 to 28D, respectively.

Similarly, the shaft support hole for pivotally supporting the return roller 44 is a long hole 57.
A, and an endless tension spring ring 58 that is wound around the feed rollers 30D and 32D is attached to the folding roller 44.
．． A portion of the roller 59 is wrapped around the roller 28D to generate a biasing force in the direction of contacting the feed roller 28D.

Further, at the upper part of the rack means 12, a photographic paper 14 is placed in a processing tank 18.
A bracket 60 is attached to the bracket 60 for sending the feed, and a substantially semicircular bending guide plate 62 is provided on the bracket 60, and a pair of feed rollers 64 and 66 are provided in the middle of the bending guide plate 62. The photographic paper 14 being sent out is pinched and conveyed and folded back into an inverted U shape.

Next, the operation of this embodiment will be explained.

After the printing process has been completed, the photographic paper 14 is conveyed in a different direction by the guide 15, and then sent between the feed rollers 28 and 30. The feed roller 28 rotates counterclockwise in FIG. 1, and the feed roller 30 rotates clockwise, gripping the tip of the fed photographic paper 14 and sending it toward the leg 34B of the guide plate 36. .

For this reason, the photographic paper 14 is sent between the feed rollers 28A and 30A while its anti-emulsion side comes into contact with the legs 34B and 36B of the guide members 34 and 36, thereby preventing the emulsion surface from being damaged. Also, the tip of this photographic paper 14 is the leg 3.
Even when it comes into contact with 4A and 36A, the notch 40 is connected to the slit 3.
Since it is not deep enough to reach the bottom of the photographic paper 14
The tip of the cutout 40 will not get caught in the notch 40. The photographic paper 14 fed between the guide members 34 and 36 is guided by the guide member 3.
4.36 and the developer that has passed through the notch 4o comes into sufficient contact with each other, so that reliable development processing is performed.

In this way, the photographic paper 14 is moved between the feed rollers 28, 30,
Between feed rollers 28A and 3 OA, feed rollers 28B and 3
When the initial development progresses after passing between 0B, both sides thereof gradually swell with the developer. Therefore, when passing between the feed rollers 28G and 30C, this swollen portion corresponds to the small diameter portion 42, 43 and is not subjected to a large clamping force. As a result, the developer solution does not seep into both sides of the photographic paper 14 in the width direction, and the photographic paper 14 is properly developed and sent to the next pair of rollers.

The photographic paper 14 passing between each roller pair is properly guided by similarly arranged guide members 34 and 36, and is sent out from between the folding rollers 44 by the feed roller 28 and reversed to between the feed rollers 28A and 32B. be done. After further rising and passing between guide members 34 and 36 and between a plurality of pairs of rollers, it is sent out from between feed rollers 28A and 32A and drawn upward, reaching the next processing tank.

The photographic paper 14, which is lifted in the direction of the arrow after being folded in this manner, is similarly moved by the feed rollers 28D, 32D and 28C3.
Due to the small diameter portion of 32C, the feed rollers 32B and 32A
, 32, the clamping pressure on both sides is reduced,
This prevents the developer from seeping into the edges of the photographic paper.

FIG. 9 shows a modification of the guide member.

This guide member 136 has leg portions 36A, 36B and a slit 37 like the guide member 36 in FIG. 6, but has a different cutout shape. Zunawa Chiko's notch 40A is elongated, and its longitudinal direction is aligned with the photographic paper conveyance direction (
It is inclined with respect to the direction of arrow B).

Therefore, the conveyed photographic paper does not need to be bent and removed from the notch 40A, and the photographic paper can be guided smoothly.

This modification is also similar in that the notch 40A is formed shallower than the slit 37.

〔Effect of the invention〕

As explained above, in the photosensitive material guiding structure for a developing device according to the present invention, a pair of guide members are arranged facing each other to guide the photosensitive material on both sides, and these guide members are provided with slits for passing the photosensitive material on both sides. The leg portion facing the slit is provided with a notch for flowing the developer. For this reason, it has an excellent effect of being able to reliably guide the photosensitive material between the plurality of pairs of colas and to improve the contact with the developer.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view taken along the line I--I in FIG. 2 showing an embodiment of the photosensitive material guide structure for a developing device according to the present invention, FIG. 2 is a left side view of FIG. 1, and FIG. 2 is a right side view, FIG. 4 is an exploded perspective view of the rack means according to this embodiment, FIG. 5 is a left side view of FIG. 2, FIG. 6 is an enlarged perspective view of the guide member, and FIG. FIG. 8 is a side view of the guide member, FIG. 8 is a plan view showing the feed roller portion in a contact state, and FIG. 9 is an enlarged perspective view showing a modification of the guide member. 10...Developing device, 12...Rack means, 14...Photographic paper, 16...Developer tank, 28.28A, 28B, 28C128D...Feed roller, 30.3OA, 30B, 30C, 30D ... Feed roller, 32. 32A, 32B, 32G, 32D... Feed roller, 34... Guide member, 34A, 34B... Leg portion, 36... Guide member, 36A, 36B... Legs, 3 7... Slints, 40.4
0A...Notch, 42...Small diameter part, 43...Small diameter part.゛.

Claims (2)

[Claims] (1) A pair of guide members are placed opposite each other to guide the photosensitive material on both sides, and these guide members are provided with slits for the photosensitive material to pass through on both sides. 1. A photosensitive material guide structure for a developing device, characterized in that a notch is provided for use in a developing device. (2) The photosensitive material guide structure for a developing device according to claim (1), wherein the notch is formed to be shallower than the depth of the slit.