JPH0465372B2 - - Google Patents

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 Problems 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 stores 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 with a cutter placed between the holding device and the developing device, and then the paper is cut off in the developing device. Consideration has been given to eliminating 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 allowing the paper to be removed 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] In the photographic paper holding device according to the present invention, the first nipping conveyor is disposed downstream of the printing section to nip and convey the photographic paper, and forms a first loop section between it and the printing section. a second nipping and conveying roller that is disposed downstream of the first nipping and conveying roller to nip and convey the photographic paper and forming a second loop section between the first nipping and conveying roller; and at least the printing section. and the first nipping and conveying roller.
a guide member disposed between a nipping conveyance roller and a second nipping conveyance roller and movable to a second position; and a guide member disposed between the printing section and the first nipping conveyance roller, the guide member being moved to the first position. a first auxiliary flap that covers the entrance portion of the first nipping and conveying roller when the first nipping and conveying roller is not in the second position; The second auxiliary flap covers the entrance portion of the nipping and conveying roller.

Therefore, in the present invention, when the exposure operation 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 restarting the exposure operation in the printing section, the guide member is moved from the second loop section to release the second loop section, and the photographic paper loop of the first loop section is moved to the second loop section;
Thereafter, the guide member is moved to the first loop section to guide the leading end of the newly sent photographic paper to the first nipping conveyance roller, and then the guide means is further moved from the first loop section to release the first loop section. A photographic paper loop can be formed in the first loop portion.

Therefore, there is no need to provide a separate cutter between the holding device and the developing device, and by making the conventionally arranged guide member movable between the first loop section and the second loop section, multiple loop sections can be moved. It is also possible to perform a baking process after forming and interrupting the process.

In addition, the first and second auxiliary flaps cover the entrance portion of the first nipping conveyance roller and the entrance portion of the second nipping conveyance roller when the guide member is not in the first position and the second position, respectively, so that the trailing edge of the photographic paper is The material does not enter the first nipping and conveying roller and the second nipping and conveying roller.

[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 holding device 10, a machine frame 18 is integrally formed with the machine frame of the printing section 12, and a delivery roller 20 is pivotally supported on the machine frame 18 downstream of the printing section 12. . This feed roller 20 rotates under the driving force of a motor (not shown), and a press roller 22 is brought into contact with the outer periphery.
The photographic paper holding device 1 holds the photographic paper 16 between the
It is designed to send it to 0.

A guide plate 23 and a cutter 2 are disposed downstream of the feed roller 20 and between it and the photographic paper holding device 10.
4 is provided so that the intermediate portion of the photographic paper 16 can be cut when necessary.

Guide plates 28 and 29 are attached to a bracket 26 fixed to the machine frame 18 downstream of the cutter 24, and the photographic paper 16 is sent out between the first nipping and conveying rollers 30 and 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, 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 that protrudes from the bearing plate 38.
4 is interlocked. 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,
This bearing plate 50 is guided by a bracket 52 attached to the bracket 26 so that it 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. An eccentric cam 58 is housed within this rectangular window 56, and an eccentric shaft 60 of this eccentric cam 58 serves as an output shaft of a motor 62. This motor 62
is supported by a bracket 26.

Therefore, the rotation of the motor 62 causes the lifting plate 54 to move up and down, moving the first nipping conveyance roller 32 to the first position.
It is designed so that it can be moved toward and away from the nipping conveyance rollers 30.

As shown in FIG. 2, the first nipping conveyance roller 30
Rotating plates 66 and 68 are respectively supported on the support shaft 34 via bearings 64 between the first nipping and conveying roller 30 and the bearing plates 38 and 40, respectively. These rotating plates 66,6
One end of a flap 70 serving as a guide member is fixed to each of the flaps 8.

A gear 72 formed on the outer periphery of the rotating plate 66
is meshed with gear 74. The shaft 76 of this gear 74 is connected to the machine frame 18 via a bearing 78.
It is pivoted to. A gear 80 is fixed to the tip of the shaft 76 protruding from the machine frame 18, and meshes with a gear 82. 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 recess 86 formed in a part of the gear 74, and is adapted to restrict the rotation angle of the flap 70. As shown in FIG.
from a first position disposed between the first nipping conveyance roller 30 and the second nipping conveyance roller 90 to a second position disposed between the first nipping conveyance roller 30 and the second nip conveyance roller 90. The rotational position of this flap 70 is determined by a sensor 9 that measures the rotational angle of a rotating plate 92 fixed to a shaft 76, as shown in FIG.
It is designed to be controlled by detection at 4. A machine stand 1 is located near the second nipping and conveying roller 90.
An auxiliary roller 91 is pivotally supported in the flap 8, so that the notch at the tip of the flap 70, which is in the second position, is inserted into the flap.

When the flap 70 is between the second position and the vertically downward position, as shown in FIG.
If the first loop portion 16A of the photographic paper 6 is between the first position and the vertically downward position, the first loop portion 16A of the photographic paper 6 is placed between the first nipping conveyance roller 30 and the first nipping conveyance roller 30 as shown in FIG. 5C. A second loop portion 16B can be formed between the second nipping and conveying roller 90 and the second nipping and conveying roller 90.

As shown in FIG. 1, the second nipping conveyance roller 90
is pivotally supported by the machine frame 18 via a bracket 96, and a second nipping and conveying roller 98 is in contact with this second nipping and conveying roller 90. Therefore, the tip of the flap 70 is connected to the second nipping conveyance roller 9.
When the photographic paper 16 reaches the second position, which is the imaginary line state in FIG. It's starting to be sent out. Therefore, the rotational force of the motor 102 is transmitted to the second nipping and conveying roller 90 .

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. As shown in FIG. 3, the bracket 110 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, screw hole 11
6 can be used to secure the bracket 110 to the machine base 18.

A pair of L-shaped protrusions 118 protrude from the bracket 110 closer to the seizing portion 12. This L-shaped protrusion 1
18 includes a pair of guide protrusions 1 erected from both sides of the auxiliary flap 112 as width direction limiting means.
20 corresponds to one end. A pivot pin 124 passes through a circular hole 90 formed at one end of the guide projection 120, and the pivot pin 124 passes through a circular hole 126 of the L-shaped protrusion 118. Therefore, the auxiliary flap 112 is configured to be pivotally supported between the printing section 12 and the first nipping conveyance roller 30 via this pivot pin 124.

The auxiliary flap 112 is connected to the first nipping conveyance roller 30
The end facing the guide part 128 is bent into a semicircular shape, and protrusions 130 protrude from both sides near the guide part 128 on the opposite side of the guide protrusion 120 and come into contact with the flap 70. It is in use. That is, when the auxiliary flap 112 reaches the first position where the flap 70 approaches the guide plate 28, the protrusion 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 from the section 12 to the first nipping and conveying roller 30. The height dimension of this guide path becomes the protrusion height of the protruding piece 130.

The projecting piece 130 also 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 auxiliary flap 1
The stopper piece 132 formed on the opposite side of the guide portion 128 of the bracket 110 is the L-shaped protrusion piece 11 of the bracket 110.
8, it abuts against a stopper piece 136 that is fixed with a screw 134, and no further rotation is possible. 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 auxiliary flap 112 is arranged so as to cross the conveyance path of the photographic paper 16 that connects the guide plates 28 and 29 and the first nipping conveyance rollers 30 and 32, and the rear end of the photographic paper 16 forming the first loop portion is used as a guide. When the photographic paper is sent out from the plates 28 and 29, the rigidity of the photographic paper may cause the trailing edge to inadvertently roll onto the first nipping conveyance roller 3.
It is designed to prevent it from entering between 0 and 32.

In order to detect the state in which the rear end of the photographic paper 16 reaches the first nipping conveyance rollers 30, 32 from the printing section 12, sensors 140, 142 are arranged upstream of the first nipping conveyance rollers 30, 32. Further, sensors 144 and 14 are installed downstream of the first nipping and transporting rollers 30 and 32 to detect the state in which the leading end of the photographic paper 16 is sent out from the first nipping and transporting rollers 30 and 32.
6 is placed. These sensors are a combination of light emitting diodes and photodiodes, with a flap 7 to pass the light from the light emitting diodes.
A through hole 148 is formed in the auxiliary flap 112, and a through hole 150 is formed in the auxiliary flap 112.

An auxiliary flap 15 shown in FIGS. 6 and 7 is connected to a bracket 152 fixed to the machine base 18 between the first clamping conveyance roller 30 and the second clamping conveyance roller 90.
4 is installed.

The bracket 152 is made of a thin steel material like the bracket 110, has an opening 156 formed in the center, and is fixed to the machine base 18 through a screw hole 158.

Projecting pieces 160 project from both sides of the opening 156, and projecting pieces 162 projecting from both sides of the auxiliary flap 154 are pivotally supported by pins 164. Therefore, the protrusion 160 and the protrusion 162 have through holes 166,
168 is formed.

A stopper 170 protruding from the intermediate portion of the auxiliary flap 154 comes into contact with a stopper fixed to the bracket 152, so that its angle of rotation is limited. Also, on the opposite side of the stopper 170 is a semicircular guide portion 1.
A chain weight 174 is fixed to the inside of the flap 55, and the auxiliary flap 154 receives a rotational urging force in the clockwise direction in FIG. Further, the auxiliary flap 154 has protrusions 176 at both ends in the width direction that protrude in a direction opposite to the protrusions 162 and come into contact with the flap 70.
Therefore, the projecting piece 176 has the role of preventing the photographic paper from meandering in correspondence with both ends in the width direction of the photographic paper passing through.

Furthermore, when the flap 70 is not in the second position, this projecting piece 176 covers the entrance portion of the second clamping and conveying roller 90 by the weight 174 in the same way as when the auxiliary flap 154 is the auxiliary flap 110, but the flap When the roller 70 moves to the second position, the protruding piece 176 is pushed up by the flap 70, opening the entrance of the second nipping and transporting roller 90, and also opening the entrance of the second nipping and transporting roller 30 and the second nipping and transporting roller 90. A photographic paper passage space whose height corresponds to the height of the projection 176 is formed between the projections 176 and 176.

In order to maintain the state in which the auxiliary flap 154 covers the entrance of the second nipping and conveying roller 90, a magnet may be attached between the stopper 170 and the stopper 172 to generate a predetermined attraction force. This also applies to the auxiliary flap 112.

Next, the operation of this embodiment will be explained.

Prior to the printing exposure operation in the printing section 12, the flap 70 is placed in the position shown in solid lines in FIG. 1, that is, in the first position. In this case flap 70
pushes up the auxiliary flap 112 via the protruding piece 130 to form a photographic paper passage space between the auxiliary flap 112 and the auxiliary flap 112.

The leading end of the photographic paper 16 that has been exposed to light in the printing section 12 is sent out by delivery rollers 20 and 22 and reaches a guide plate 28 . Further, the leading edge of the photographic paper 16 is fed between the first nipping and conveying rollers 30 and 32 through between the flap 70 and the auxiliary flap 112. In this case, the photographic paper is the protrusion 7 of the flap 70.
1. Movement in the width direction is restricted by a guide protrusion 120 formed on the auxiliary flap 112;
In addition, since movement in the width direction is also restricted by the flange 31 of the first nipping and conveying roller 30, the sheet is accurately held between the first nipping and conveying rollers 30 and 32 without misalignment.

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 photographic paper 16 is stopped.
The movement of the tip of the is stopped.

Here, the flap 70 is rotated counterclockwise in FIG. 1 and moved to the second position as shown in FIG. do. 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, a first loop section 16A is formed between the guide plate 28 and the first nipping conveyance roller 30.

At the same time, the leading edge of the photographic paper 16 is sent out over the flap 70 and 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 and 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 extends into the flap 31, prevents this meandering.

When the printing operation in the printing section 12 is temporarily interrupted, the middle portion of the photographic paper 16 is cut by the cutter 24. 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.

When the rear end of the photographic paper 16 cut in this way is sent out from the guide plate 28, the rear end of the photographic paper 16 is moved to the first nipping conveyance roller 3 due to its rigidity.
There is a possibility that it will bounce back to between 0 and 32 and be pinched.

However, in this embodiment, the first nipping conveyance roller 30,
Since the auxiliary flap 112 is lowered by its own weight in front of the paper 32 and covers the paper, the rear end of the cut photographic paper does not enter between the first nipping and conveying rollers 30 and 32.

The guide plate 28 and the first loop portion 16A
When it is desired to start the exposure operation again in the printing section 12 with the rear end of the photographic paper 16 remaining between the nipping and conveying rollers 30, the motor 46 is moved as shown in FIG. 5C.
is actuated to move the flap 70 from the second loop portion to the vertical position. Therefore, the auxiliary flap 154
rotates clockwise in Figure 1 under its own weight, and the guide portion 155
covers the entrance portion of the second nipping and conveying roller 90.

Here, the first pinching conveyance roller 32 is brought into contact with the first pinching conveyance roller 30, and the first pinching conveyance roller 30 is brought into contact with the first pinching conveyance roller 30.
When rotated by the driving force of the motor 46, the photographic paper in the first loop section 16A moves and moves to the second loop section 16A.
It becomes B.

Thereafter, as the feeding by the first nipping and conveying rollers 30 and 32 gradually progresses, the photographic paper 1 as shown in FIG.
The rear end of 6 hangs down from the second nipping conveyance roller 90 . The flap 70 is now placed in the first position for closing the first loop portion, as shown in FIG. 5D, and the firing operation begins.

This rotational movement of the flap 70 is caused by receiving a command to move to the first position when the rear end of the photographic paper 16 passes through the sensors 144 and 146. Due to the frictional force between the roller and the conveyance roller 30, the roller may remain in contact with the first nipping roller 30. In this case, since the sensors 144 and 146 still cannot detect the passage of the trailing edge of the photographic paper 16, the flap 70 is
cannot be placed into position. However, since this embodiment has sensors 140 and 142,
If the flap 70 is rotated to the first position after a predetermined period of time has elapsed after the rear end of the photographic paper 16 has passed between the sensors 140 and 142, the rear end of the photographic paper can be moved between the first nipping and conveying rollers. 30, the flap 70 can be reliably moved to the first position even when the flap 70 is stopped by frictional force.

When the 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 power supply is resumed, the state in which the photographic paper 16 is arranged can be detected by the sensors 140 and 142.

Also, the rear end of the photographic paper in the second loop portion 16B is
When the photographic paper is sent out from the nipping conveyance roller 30, there is a possibility that the rear end of the photographic paper is inadvertently nipped by the second nipping conveyance rollers 90 and 98, as in the case of the first loop portion 16A, due to the rigidity of the photographic paper. However, in this embodiment, as in the case of the auxiliary flap 112, the auxiliary flap 154 covers the entrance portion of the second nipping and conveying rollers 90, so that the trailing edge of the photographic paper is transferred to the second nipping and conveying rollers 90, 98 along with the intermediate portion. It will not be caught carelessly.

The leading edge of the photographic paper 16 newly printed in this way is guided by the flap 70 and sent between the first nipping and conveying rollers 30 and 32. Photographic paper 1
When the tip of the flap 6 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. make it stop.
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.

Therefore, even if the rear end of the photographic paper 16 that was exposed before the printing operation was interrupted remains undeveloped, it is possible to accumulate the photographic paper 16 in the first loop section after printing is restarted. .

On the other hand, in conventional printing devices, the loop can only be formed in one location, so cutters are required before and after the photographic paper holding device 10.
If the loop portion from before the interruption remains when the printing is resumed after the printing is interrupted, there will be a problem that it may be impossible to restart the printing.

In the above embodiment, the auxiliary flaps 112, 15
4 is pivotally supported at a portion close to the guide plate 28 and the second nipping and conveying roller, but it may be configured to be pivotally supported at a portion close to the first nipping and conveying roller 30.

[Effects of the Invention] As explained above, the photographic paper holding device according to the present invention is a photographic paper holding device that is disposed downstream of the printing section and sends out the continuous photographic paper after printing to the next process, and includes:
a first nipping conveyance roller disposed downstream of the printing section to nip and convey the photographic paper and forming a first loop section between it and the printing section; a second nipping conveyance roller that nip and convey the paper and forms a second loop portion between it and the first nipping conveyance roller; a first position disposed between at least the printing section and the first nipping conveyance roller; a guide member disposed between a first nipping conveyance roller and a second nipping conveyance roller and movable to a second position; and a guide member disposed between the printing section and the first nipping conveyance roller, the guiding member a first auxiliary flap that covers the entrance portion of the first nipping and conveying roller when the first nipping and conveying roller is not in the second position; Since it has a second auxiliary flap that covers the entrance of the second nipping and conveying roller, the number of cutters required can be reduced, the printing operation can be resumed immediately even after the printing operation has been stopped, and the printing paper can be maintained normally. It has an excellent effect of maintaining smooth feed.

[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 of FIG.
Fig. 3 is a perspective view of the bracket to which the auxiliary flap is attached, Fig. 4 is a perspective view of the auxiliary flap, Figs. FIG. 7 is a perspective view of the bracket to which the flap is attached, and FIG. 7 is a perspective view of the auxiliary flap. 10... Photographic paper holding device, 12... Printing section, 1
4... Developing section, 16... Photographic paper, 24... Cutter, 30, 32... First nipping conveyance roller, 90,
98...Second clamping and conveying roller, 112...Auxiliary flap, 154...Auxiliary flap.

Claims (1)

[Claims] 1 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. The first loop portion forming the first loop portion.
a nipping conveyance roller, which is disposed downstream of the first nipping conveyance roller to nip and convey the photographic paper;
a second nipping conveyance roller forming a second loop portion between the nipping conveyance roller; a first position disposed between at least the printing section and the first nipping conveyance roller; a guide member disposed between the nipping conveyance roller and movable to a second position;
a first auxiliary flap that covers the entrance portion of the nipping conveyance roller; and a first auxiliary flap that is disposed between the first nipping conveyance roller and the second nipping conveyance roller and closes the entrance of the second nipping conveyance roller when the first guide member is not in the second position. 2nd covering part
A photographic paper holding device characterized by having an auxiliary flap.