JPS6299736A - Printing paper reserving device - Google Patents

Abstract

PURPOSE:To reduce the number of cutters and to resume printing immediately after stopping printing work and to prevent zigzag movement of a loop part by providing an auxiliary flap that covers the entrance of the first holding and carrying roller when a guide member is not at the first position. CONSTITUTION:When printing paper 16 wound on the first holding and carrying roller 30 does not receive holding force of the first holding and carrying roller 32, zigzag movement is apt to occur during advancing. However, this zigzag movement is prevented by a flange 31 and the guide part 128 of an auxiliary flap 112. When printing work in a printing section 12 is suspended, the intermediate part of the printing paper 16 is cut by cutter 24. Even during suspension of exposing work, the printing paper 16 after printing is sent to a developing section 14 and developing work is proceeded. When the rear end of the cut printing paper 16 is sent out from a guide plate 28, the rear end of the cut printing paper does not enter between the first holding and carrying rollers 30, 32 as the auxiliary flap 112 comes down by its own weight and covers the front of the first holding and carrying rollers 30, 32.

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 storage device temporarily accumulates continuous photographic paper fed out at high speed from the printing section in a loop, and absorbs the speed difference between it and the developing device, which processes at low speed. There is.

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. 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 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 reduces the number of cutters required, allows the printing operation to be resumed immediately even after the printing operation has been stopped, furthermore prevents meandering of the loop portion, and allows normal printing of photographic paper. The object is to obtain a similar photographic paper holding device that can maintain feeding.

[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
The first nipping conveyance roller forming the loop portion and this ff1
l A second nipping conveyance roller disposed downstream of the nipping conveyance roller to nip and convey the photographic paper and forming a second loop section between it and the first nipping conveyance roller; and at least the printing section and the first nipping conveyance roller. a guide member movable to a first position disposed between the rollers and a second position disposed between the first nipping conveyance roller and the second nipping conveyance roller, and regulating movement of the photographic paper in the width direction; and an auxiliary flap that is disposed between the burning section and the first nipping conveyance roller and covers the entrance part of the first nipping conveyance roller when the guide member is not in the first position. ing.

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 There are 11 photographic paper loops formed in the section.

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

Further, in the present invention, since the restricting means restricts the movement of the photographic paper in the width direction, meandering of the loop portion is prevented and stable feeding can be ensured.

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 ml nipping conveyance roller.

[Embodiment of the Invention] FIGS. 1 and 2 show a photographic paper holding device 2110 according to an embodiment of the invention. This photographic paper holding device
is arranged between the printing section 12 and the developing section 14, and guides the continuous photographic paper 16 exposed in the printing section 12 to the developing section 14.

Photographic paper holding device 5! In tlQ, 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. The feed roller 20 rotates under the driving force of a motor (not shown), and pinches the photographic paper 16 between it and a pressing roller 22 that comes into contact with the outer periphery, and feeds the photographic paper 16 to the photographic paper holding device 10. .

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, and is adapted to feed the photographic paper 16 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.

The support shaft 34 has teeth 1114 at the tip protruding from the bearing plate 38.
2 is fixed, and this gear 42 meshes with a gear 44. This gear 44 is fixed to an output shaft 48 of a motor 46 attached to the machine frame 18. As a result, the motor 46 transfers its rotational force to the first nipping conveyance roller 3.
0 to rotate the first nipping conveyance 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. These rotating plays) 66.68 have flaps 7 as guide members.
0 is fixed at one end.

A gear 72 formed on the outer periphery of the rotating plate 66 is a gear 7
It meshes with 4. The shaft 76 of this gear 74 is rotatably supported by the machine frame 18 via a bearing 78. The gear 8 is attached to the tip of the shaft 76 that protrudes from the machine frame 18.
0 is fixed and meshes with the gear 82. This gear 82 is fixed to an output shaft 85 of a motor 84,
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, 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 second nipping conveyance roller 30 and the second nipping conveyance roller as shown in FIG. It reaches a second position where it is stretched between the rollers 90 and the rollers 90. Furthermore, this flap 7
The zero rotation position is controlled by detecting the rotation angle of a rotary plate 92 fixed to the shaft 76 with a sensor 94, as shown in FIG. In this second position, the flap 70 is arranged so that the notch at the leading end enters between the auxiliary rollers 91 that are pivotally supported on the machine base 18 .

When the flap 70 is between the second position and the vertically downward position, as shown in FIG.
6A 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 nipping and conveying roller 90 includes a second nipping and conveying roller 9
8 is in contact. 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 9o.

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 1 as shown in FIG.
1O 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 seizure portion lz. 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-shaped protrusion 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 used for entry and exit with 0. That is, the auxiliary flap 11
2, when the flap 70 reaches the m1 position where its tip approaches 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 nipping and conveying rollers 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 portion 128 of the auxiliary flap 112 comes into contact with the stopper piece 136 fixed by the L-shaped protrusion 118 of the bracket 110 and the heavies 134, and from then on. This is a configuration that prevents rotation of the hi. In this way, the auxiliary flap 112 is the largest! 4 In the lowered state, the guide part 128
covers 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 plate 28.29 and the first nipping conveyance roller 30.32, and the rear end of the photographic paper 16 forming the first loop portion is used as a guide. The stiffness of the photographic paper may cause this trailing edge to inadvertently slip into the first
This is to prevent the paper from entering between the 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 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.
, 146 are arranged. These seven sensors are a combination of a light emitting diode and a photodiode, and a through hole 148 is formed in the flap 70 and a through hole 150 is formed in the auxiliary flap 112 in order to pass light from the light emitting diode.

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 located at the position indicated by the solid line in FIG. 1, that is, at the first position. In this case, the flap 70 is the auxiliary flap 112
is pushed up through the protruding piece 130 to form a photographic paper passage space between it 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 end of the photographic paper 16 passes between the flap 70 and the auxiliary flap 112 and passes through the first nipping conveyance roller 3.
It is sent between 0 and 32. 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.
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 any center deviation.

When the sensors 144, 14B 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 end 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 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,
The rear end portion can be used by springing back and being clamped between the first clamping and conveying rollers 30,32.

However, in this embodiment, the auxiliary flap 112 lowers 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 rollers 30.
．． It does not enter between 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 and conveying rollers 30, 32 gradually progresses, the rear end of the photographic paper 16 hangs down from the second nipping and conveying roller 90, as shown in FIG. 5(D). The flap 7'O is now placed in the first position for closing the first loop portion, as shown in FIG. 5CD), 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, 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 rotated to the first nipping and conveying roller. 30, the flap 70 can be reliably moved to the first position even when the flap 70 is stopped by frictional force.

Providing the sensors 140 and 142 in this manner also serves as a measure 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.

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 directly below the sensor 6, for example. Stop in the lowered 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, it is possible to accumulate the photographic paper 16 in the first loop section after printing is resumed. be.

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.

In addition, in the second embodiment, a configuration was shown in which the auxiliary flap 112 was pivoted at a portion close to the force ζ guide plate 28, but the first embodiment
It may also be configured to be pivoted at a portion close to the nipping and conveying rollers 30.

[Effect of the Invention J As explained above, the photographic paper holding device according to the present invention is a photographic paper holding device which is disposed downstream of the printing section and sends out the continuous photographic paper after printing to the next process, 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 first position disposed between the nipping conveyance roller and at least the printing section and the first nipping conveyance roller; 6; and a second position disposed between the first nipping conveyance roller and the second nipping conveyance roller; A movable guide member, a restricting means for restricting movement of the photographic paper in the width direction, and disposed between the printing section and the first nipping and conveying roller.

and an auxiliary flap that covers the entrance portion of the first nipping and conveying roller when the guide member is not in the first position.
To reduce the number of cutters required, to immediately restart printing work even after it has been stopped, to prevent meandering of a loop part, and to maintain normal feeding of 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 line II-II i of FIG.
The figure 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.--Photographic paper holding device. 12・φ・Printing section, 14th development section, 16.・Kist photographic paper, 24・m11 cutter, 30.32・・1st nipping conveyance roller, 310.・Flange, 90.98-・Second clamping and conveying roller, 112・e-auxiliary flap, 120・e-guide protrusion, 124・・mounting shaft support 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 movable to a position; a restricting means for restricting movement of the photographic paper in the width direction; A photographic paper holding device comprising: an auxiliary flap that covers an entrance portion of a nipping conveyance roller.