JPS6298338A - Photographic paper retaining device - Google Patents

Abstract

PURPOSE:To restart a printing operation immediately after its interruption by providing a photographic paper retaining device which sends out continuous photographic paper after printing to a developing device with an auxiliary flap which covers the entrance for a clamping conveyor roller which conveys the photographic paper at the entrance. CONSTITUTION:The continuous photographic paper 16 is sent from a printing device 12 to a roller 20. Then, the photographic paper 16 is run between a flap 70 and the auxiliary flap 112 and sent to the 1st clamping conveyor roller 30. Then, the flap 70 is rotated counterclockwise (chain-line position 70) and the photographic paper is sent to the 2nd clamping conveyor roller 90 and sent out to a development part. At this time, the photographic paper 16 is loosened as the 1st loop part between a guide 28 and the roller 30 and as the 2nd loop part between the rollers 30 and 90, and stacked. The end part of the photographic paper 16 is prevented from entering the roller 30 by the auxiliary flap 112 even when the paper 16 is cut 24 during the interruption of printing operation. Thus, the auxiliary flap is provided, so cutters are reduced and the printing operation is restarted immediately.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a photographic paper holding device that sends printed continuous photographic paper to the next process such as a developing device.

[Background Art and Issues to be Solved] In an apparatus in which a developing device is disposed downstream of a printing section that exposes photographic paper from a negative film and continuously develops the photographic paper after printing, it is necessary to In order to absorb the difference in photographic paper feeding speed between the developing devices, a photographic paper holding device is required in the intermediate portion.

This photographic paper holding device temporarily accumulates continuous photographic paper fed out at high speed from the printing section in a loop shape, and is designed to absorb the speed difference between the continuous photographic paper and the developing device which processes at low speed.

However, with such a holding device, when the exposure work in the printing section is temporarily interrupted, the middle part of the continuous photographic paper is cut by a cutter placed between the holding device and the developing device, and then the paper is cut off by the developing device. It is designed to eliminate the need for photographic paper to stop. As a result, the exposure work can be started immediately when the exposure work is started in the printing section, and the photographic paper already stored in a loop can be sequentially sent to the printing device. Furthermore, this holding device has a cutter placed between it and the printing section, and when the printing process is finished, this cutter cuts the middle part of the photographic paper, eliminating the need to develop unnecessary photographic paper and cutting off the paper after exposure. All photographic paper is designed to be developed.

Therefore, such a conventional holding device requires a cutter between the developing device and the printing section, making maintenance and management of these cutters complicated.

Furthermore, if the photographic paper is cut with a cutter between the printing section and the holding device when attempting to finish the printing operation, even if it becomes necessary to restart the printing operation for some reason, the prints accumulated in the loop section will be removed. Since the photographic paper cannot be sent to the holding device until all the paper is sent to the developing device, the printing operation cannot be resumed.

In consideration of the above facts, the present invention provides a similar photographic paper holding device that reduces the number of cutters required, allows the printing operation to be resumed immediately even after the printing operation has been stopped, and further maintains the normal feeding of the photographic paper. The purpose is to obtain.

[Summary and operation of the invention] The photographic paper holding device according to the present invention is arranged downstream of the printing section to nip and convey the photographic paper, and also has a first
A first nipping conveyance roller forming a loop portion, and a second nipping conveyance roller disposed downstream of the first nipping conveyance roller to nip and convey the photographic paper and forming a second loop portion between the first nipping conveyance roller and the first nipping conveyance roller. a nipping conveyance roller, a first position disposed between at least the printing section and the first nipping conveyance roller;
a guide member movable to a second position disposed between the nipping conveyance roller and the second nipping conveyance roller;
An auxiliary flap is provided between the nipping conveyance roller and the first nipping conveyance roller, the auxiliary flap being pivotally supported near the burning section and covering the entrance portion of the first nipping conveyance roller when the guide member is not in the first position.

Therefore, in the present invention, when the exposure work in the printing section is temporarily interrupted, the middle part of the photographic paper can be cut with a cutter disposed between the holding device and the printing section, and development can be continued. When the exposure operation in the printing section is resumed, the guide member is moved from the second loop section to release the second loop section, the photographic paper loop of the first loop section is moved to the second loop section, and then the guide member is moved from the second loop section to the second loop section. The leading edge of the photographic paper to be newly sent out is guided to the first nipping conveyance roller by moving it to the first loop section, and then the guiding means is further moved from the first loop section to release the first loop section, and It is possible to form a photographic paper loop in the section.

Therefore, there is no need to provide a separate cutter between the holding device and the developing device, and the conventional guide member
By making it movable between the loop portion and the second loop portion, a plurality of loop portions are formed, thereby making it possible to perform the printing process after interruption.

Further, the auxiliary flap covers the entrance portion of the first nipping and conveying roller when the guide member is not in the first position.

The rear end of the photographic paper does not enter the first nipping and conveying roller, and normal feeding of the photographic paper can be maintained.

[Embodiment of the Invention] FIGS. 1 and 2 show a photographic paper holding device 10 according to an embodiment of the invention. This photographic paper holding device 10 is disposed between the printing section 12 and the developing section 14, and is adapted to guide the continuous photographic paper 16 exposed in the printing section 12 to the developing section 14.

In the photographic paper loop 2110, the machine frame 18 is the printing section 1.
The machine frame 18 has a delivery roller 2 disposed downstream of the printing section 12.
0 is pivoted. The feed roller 20 rotates under the driving force of a motor (not shown), holds the photographic paper 16 between it and a pressure roller 22 that comes into contact with the outer periphery, and sends the photographic paper 16 to the photographic paper holding device IO. .

A guide plate 23 and a cutter 24 are provided downstream of the feed roller 20 and between it and the photographic paper holding device 10, so that the intermediate portion of the photographic paper 16 can be cut when necessary.

A guide plate 28, 29 is attached to a bracket 26 fixed to the machine frame 18 downstream of the cutter 24, so that the photographic paper 16 is sent between the first nipping and conveying rollers 30, 32. The first nipping and conveying roller 30 has a flange 31 serving as a widthwise limiting means, and a support shaft 34 that is integrally fixed is attached to bearing plates 38 and 40 through bearings 36 near both ends, as shown in FIG. It is pivoted to. These bearing plates 38,40 depend from the bracket 26.

A gear 42 is fixed to the tip of the support shaft 34 protruding from the bearing plate 38, and the gear 42 meshes with the gear 44. This gear 44 is fixed to an output shaft 48 of a motor 46 attached to the machine frame 18. This allows the motor 46 to transmit its rotational force to the first nipping and conveying roller 30 to rotate the first nipping and conveying roller 30 .

The first nipping and conveying roller 32 that is pressed against the first nipping and conveying roller 30 is pivotally supported by a bearing plate 50.
is guided by a bracket 52 attached to the bracket 26 and can move in the direction toward and away from the first nipping and conveying roller 30.

Further, a lower end portion of an elevating plate 54 is attached to the bearing plate 50, and a rectangular window 56 is formed at the upper end portion of the elevating plate 54, as shown in FIG. This rectangular window 5
An eccentric cam 58 is housed in the eccentric cam 6 , and an eccentric shaft 60 of the eccentric cam 58 serves as an output shaft of a motor 62 .

This motor 62 is supported by the bracket 26.

Therefore, the rotation of the motor 62 moves the elevating plate 54 up and down, allowing the first nipping and conveying roller 32 to approach and separate from the first nipping and conveying roller 30.

As shown in FIG.
4, rotary plates 66 and 68 are each pivotally supported between the first nipping conveyance roller 30 and the bearing plates 38 and 40 via bearings 64, respectively. One end of a flap 70 serving as a guide member is fixed to each of these rotary plates 66 and 88.

A gear 72 formed on the outer periphery of the rotating plate 66 is a gear 7
It meshes with 4. A shaft 76 of this gear 74 is pivotally supported by the machine frame 18 via a bearing 78. A gear 8 is attached to the tip of the car 76 protruding from the machine frame 18.
0 is fixed and meshes with the mountain 1t82. This gear 82 is fixed to an output shaft 85 of a motor 84, and the motor 84 is attached to the machine frame 18.

Therefore, when the motor 84 rotates, the flap 70 can rotate in response to this driving force.

As shown in FIG. 2, a restriction pin 88 protruding from the machine frame 18 is inserted into a four part 86 formed on a part of the gear 74, so as to restrict the rotation angle of the flap 70. The rotation angle of the flap 70 varies from the first position where the flap 70 is disposed between the guide plate 28 and the first nipping conveyance roller 30 to the first nipping conveyance roller 30 and the second nipping conveyance roller as shown in FIG. It extends to a second position where it is spanned between rollers 90. Furthermore, this flap 7
The rotational position of 0 is controlled by detecting the rotational angle of a rotary plate 92 fixed to the shaft 76 with a sensor 94, as shown in FIG.

When the flap 70 is between the second position and the vertically downward position, as shown in FIG.
8A between the first position and the vertically downward position, a second loop portion 16B is formed between the first nipping conveyance roller 30 and the second nipping conveyance roller 90 as shown in FIG. 5(C). It is possible.

As shown in FIG. 1, the second nipping and conveying roller 90 is pivotally supported on the machine frame 18 via a bracket 96.
This second pinching conveyance roller 90 has a second pinching conveyance roller 9
8 is still connected. Therefore, the tip of the flap 70 is the second
When the photographic paper 16 reaches the second position shown in the imaginary line in FIG. It is designed to be sent out. Therefore, the rotational force of the motor 102 is transmitted to the second nipping and conveying roller 90 .

Note that a guide plate 106 is disposed above the photographic paper 16 passing through the second loop portion 16B to smoothly guide the photographic paper 16 through the second loop portion 16B.
It is adapted to be guided to nipping conveyance rollers 90 and 98.

An auxiliary flap 112 is attached to a bracket 110 fixed to the machine base 18 between the printing section 12 and the first holding roller 30. Bracket as shown in Figure 3)1
10 has a large opening 114 in the center of the thin steel material, and has screw holes 116 around this opening 114. For this reason, use the screw holes 116 to attach the bracket 110 to the machine base 18.
can be attached to.

A pair of L-shaped protrusions 118 protrude from the bracket llo near the burning portion 12. This L-shaped projecting piece 118 corresponds to one end of a pair of guide protrusions 120, which serve as width direction limiting means and are provided upright from both sides of the auxiliary flap 112. A circular hole 90 formed at one end of this guide protrusion 120 is penetrated by a pivot pin 124.
24 passes through the circular hole 126 of the L-swelling piece 118. For this reason, the auxiliary flap 112 is configured to be pivotally supported between the printing section 12 and the first nipping conveyance roller 30 via the pivot pin 124.

The auxiliary flap 112 has a guide portion 128 that is bent into a semicircular shape at the end facing the first nipping and conveying roller 30, and protrudes from both sides near the guide portion 128 to the opposite side of the guide protrusion 120. The piece 130 protrudes from the flap 7
It is for contact with 0. That is, the auxiliary flap 11
2, when the flap 70 reaches the first position with its tip approaching the guide plate 28, the protruding piece 130 is pushed up by the flap 70 and reaches the state shown by the solid line in FIG. A guide path is formed to guide the photographic paper 16 to the first nipping and conveying roller 30.

The height dimension of this guide path becomes the protrusion height of the protruding piece 130.

Further, this projecting piece 130 has the role of restricting the movement of the photographic paper 16 in the width direction as it passes along with the projecting pieces 71 projected from both sides of the flap 70.

However, when the flap 70 is in the hanging state, the auxiliary flap 112 can rotate around the pivot pin 124 due to its own weight to the state shown in the imaginary line in FIG.

In this state of rotation due to its own weight, the stopper piece 132 formed on the opposite side of the guide part 128 of the auxiliary flap 112 comes into contact with the stopper piece 136 fixed by the L-shaped protrusion 118 of the bracket llo, and This configuration prevents rotation. In this state where the auxiliary flap 112 is lowered by the maximum amount, the guide portion 128 covers the space between the first nipping and conveying rollers 30 and 32. That is, the guide plates 28 and 29 and the first nipping conveyance roller 3
An auxiliary flap 112 is arranged so as to cross the transport path of the photographic paper 16 that connects the photographic paper 16 to the guide plate 28.32. This rigidity prevents the rear end from inadvertently entering between the first nipping and conveying rollers 30 and 32.

In order to detect the state in which the rear end of the photographic paper 16 reaches the first nipping conveyance roller 30.32 from the printing section 12, sensors 140, 142 are provided upstream of the first nipping conveyance roller 30.32.
A sensor 144 is arranged downstream of the first nipping conveyance roller 30.32 to detect the state in which the leading end of the photographic paper 16 is sent out from the first nipping conveyance roller 30.32.
, 146 are arranged. These sensors are a combination of a light emitting diode and a photodiode, and in order to pass light from one light emitting diode, a through hole 148 is formed in the flap 70 and a through hole 150 is formed in the auxiliary flap 112.

Next, the operation of this embodiment will be explained.

Prior to the printing exposure work in the printing section 12, the flap 70 is
is placed in the position shown in solid line in FIG. 1, ie, in the first position. In this case, the flap 70 is the auxiliary flap 112
is pushed up through the projection 130 to form a photographic paper passage space between the auxiliary flaps 112.

The leading end of the photographic paper 16, which has been exposed to light in the printing i'rll 12, is sent out by a delivery roller 20, 22 and reaches a guide plate 28. Further, the leading edge of the photographic paper 16 passes between the flap 70 and the auxiliary flap 112 and is sent between the first nipping and conveying rollers 30 and 32 -2. In this case, the movement of the photographic paper in the width direction is restricted by the protrusion 71 of the flap 70 and the guide protrusion 120 formed on the auxiliary flap 112, and the flange 31 of the first nipping and conveying roller 30
Since the movement in the width direction is also restricted by , the sheet is accurately held between the first nipping and conveying rollers 30 and 32 without any center deviation.

When the sensors 144 and 146 detect the leading edge of the photographic paper 16, the rotation of the motor 46 is stopped and the movement of the leading edge of the photographic paper 16 is stopped.

Here, the flap 70 rotates counterclockwise in FIG.
The auxiliary flap 11 is moved to the second position as shown in Figure (B).
2 is in the state shown by the imaginary line in FIG.
At the same time, the rotation of the motor 46 is restarted. However, since the intermediate portion of the photographic paper 16 exposed at high speed is sent out from the developing section 14, the guide plate 28
A first loop portion 16 is provided between the first nipping and conveying roller 30 and
A is formed.

At the same time, the leading end of the photographic paper 16 that is sent out moves on the flap 70 and is sent out between the second nipping and conveying rollers 90 and 98. As the motor 102 rotates, the leading edge of the photographic paper 16 is sent out from between the second nipping and conveying rollers 90, 98 to the developing section 14, and a developing operation is sequentially performed.

In this state, when the leading edge of the photographic paper 16 is sent out from between the second nipping and conveying rollers 90 and 98 by the drive of the motor 102, the first nipping and conveying roller 32 is raised by the rotation of the motor 62, and the first nipping and conveying roller 32 is moved up to the first nipping and conveying roller. It is separated from the roller 30, and the feeding force to the developing section 14 is performed only by the motor 102.

As described above, if the photographic paper 16 wound around the first nipping and conveying roller 30 is not subjected to the nipping force of the first nipping and conveying roller 32, the photographic paper 16 is likely to meander as it advances, but the flange 31 and these flanges The guide portion 128 of the auxiliary flap 112, which is inserted into the inside of the auxiliary flap 112, prevents this meandering.

When temporarily interrupting the printing operation in the printing section 12,
The cutter 24 cuts the middle portion of the photographic paper 16. Even during this interruption of the exposure operation, the photographic paper 16 after printing is gradually sent to the developing section 14 at a low speed, and the developing operation continues.

The rear end of the photographic paper 16 cut in this way is attached to the guide plate 2.
When the photographic paper 16 is fed out from the paper 8, due to its rigidity,
There is a possibility that the rear end part will bounce back and be clamped between the first clamping and conveying rollers 30,32.

However, in this embodiment, the auxiliary flap 112 descends and covers the first nipping and transporting rollers 30°32 by its own weight, so that the rear end of the cut photographic paper is exposed to the first nipping and transporting roller 30.
It will not fall between 0 and 32.

If you want to start the exposure operation again in the printing section 12 with the rear end of the photographic paper 16 remaining between the guide plate 28 and the first nipping and conveying roller 30 as the first loop section 16A,
The flap 70 is opened by driving the motor 46 as shown in FIG. 5(C).
from the second loop section to a vertical position. Here, if the first nipping conveyance roller 32 is brought into contact with the first nipping conveyance roller 30 and the first nipping conveyance roller 30 is rotated by the driving force of the motor 46, the photographic paper in the first loop portion 16A will be moved. This becomes the second loop portion 16B.

Thereafter, as the feeding by the first nipping conveyance rollers 30 and 32 progresses gradually, the rear end of the photographic paper 16 hangs down from the second nipping conveyance roller 90, as shown in FIG. 5(D). Here, the flap 70 is placed in the first position to close the first loop portion, as shown in FIG. 5(D), and the printing operation is started.

This rotational movement of the flap 70 is caused by the rear end of the photographic paper 16 passing through the sensors 144 and 146.
Although the printing paper 16 receives a command to move to a certain position, the rear end of the photographic paper 16 may remain in contact with the first nipping roller 30 due to the frictional force between the photographic paper 16 and the first nipping and conveying roller 30 . In this case, the sensors 144 and 146 still cannot detect the passage of the trailing edge of the photographic paper 16, so the flap 70 is moved to the first position.
However, since this embodiment has sensors 140 and 142, the rear end of the photographic paper 16 passes between the sensors 140 and 142, and after a predetermined time elapses, the flap 70 If the photographic paper is rotated to the first position, the rear end of the photographic paper will be rotated to the first nipping and conveying roller 30.
Even when the flap 70 is stopped due to frictional force, the flap 70 can be reliably moved to the first position.

When sensors 140 and 142 are provided in this way.

It can also be used as a countermeasure against power outages. That is, after the power outage is resolved and the power supply is restarted, the state in which the photographic paper 16 is arranged can be detected by the sensors 140 and 142.

As a result, the leading edge of the newly printed photographic paper 16 is guided by the flap 70, and the first nipping conveyance roller 3
Sent to 0.32 minutes. When the leading edge of the photographic paper 16 reaches between the sensors 144 and 146, the driving of the first nipping and conveying roller 30 is stopped again, and the flap 70 is moved from the first position and suspended vertically downward, for example. Stop it in the same position. As the printing operation progresses in the printing section 12, the photographic paper 16 after printing is accumulated in a loop shape as a first loop section 16A.

In this way, even if the rear end of the photographic paper 16 that was exposed before the printing operation was interrupted remains undeveloped, the photographic paper 16 after restarting the printing process cannot be stacked in the first loop section. It is possible.

On the other hand, in conventional printing devices, the loop can only be formed in one place, so a cutter is required before and after the photographic paper storage device 10, and when printing is resumed after printing is interrupted, the loop can be formed at only one location. If this remains, there will be a problem that it may be impossible to resume printing.

[Effects of the Invention] As explained above, the photographic paper holding device according to the present invention is a photographic paper holding device which is arranged downstream of the printing section and sends out the continuous photographic paper after printing to the next process. a first nipping conveyance roller arranged in the stream to nip and convey the photographic paper and forming a first loop section between it and the printing section; a second nipping conveyance roller forming a second loop portion between the second nipping conveyance roller and the first nipping conveyance roller;
a guide member movable to a first position disposed between the nipping conveyance roller and a second position disposed between the first nipping conveyance roller and the second nipping conveyance roller; An auxiliary flap is provided between the nipping conveyance roller and the auxiliary flap that is pivotally supported near the burning section and covers the entrance portion of the first nipping conveyance roller when the guide member is not in the first position, thereby reducing the number of cutters required. Even after the printing operation has been stopped, the printing operation can be restarted immediately, and furthermore, it has an excellent effect of maintaining normal feeding of the photographic paper.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the photographic paper holding device according to the present invention, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, FIG. 3 is a perspective view of a bracket for attaching an auxiliary flap, and FIG. 4 5 is a perspective view of the auxiliary flap, and FIGS. 5(A) to 5(E) are explanatory views showing the operating state of the guide member in FIG. 1, respectively. 10. Fist: photographic paper holding device, 12φ: printing section, 14: developing section, 161: photographic paper, 24: -cutter, 30. 32: first nipping conveyance roller, 31... and fufu /n, 90.98・Fist・Second clamping conveyance roller, 112-・Auxiliary flap, 120・Guide protrusion, 124・・Φ pivot pin.

Claims (1)

[Claims] (1) A photographic paper holding device that is placed downstream of the printing section and sends out the continuous photographic paper after printing to the next process. A first nipping conveyance roller forming a first loop portion therebetween, and a second loop portion disposed downstream of the first nipping conveyance roller to nip and convey the photographic paper and forming a second loop portion between the first nipping conveyance roller and the first nipping conveyance roller. a second pinching conveyance roller to be formed, a first position disposed between at least the printing section and the first pinching conveyance roller, and a second pinching conveyance roller disposed between the first pinching conveyance roller and the second pinching conveyance roller. a guide member that is movable to a position, and is pivotally supported near the printing section between the printing section and the first nipping and conveying roller, and covers an inlet portion of the first nipping and conveying roller when the guide member is not in the first position. A photographic paper holding device characterized by having an auxiliary flap.