JPH01144032A - Instant photographing device - Google Patents

Abstract

PURPOSE:To detect the dislocation of pods and their inversion and to eliminate developing error by providing a pod detecting sensor before a developing roller pair. CONSTITUTION:A positive sheet 71 is fed by a roll 36, and is further fed by a roller 38. Its tip is detected by a sensor 37, and the sheet 71 is sent until its tip hits the developing roller pair 30. After the positive sheet 71 is ready, a reel 84 is driven, and one pod 15 drops and is set to the positive sheet 71. After a sensor 80 provided before said roller pair 30 recognizes that the pod 15 passes, a negative film 64 begins to be fed. Thus the precise location of the pods can be detected and developing error can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a peel-apart type instant photographic apparatus configured to cut a roll-shaped photosensitive member one by one.

[Prior art]

An instant photographic device that uses this kind of peel-apart type instant photographic film pulls out a roll of negative film (photosensitive member) to the exposure position, and connects the exposed negative sheet (cut negative film) with the timing from a predetermined position. The positive sheet conveyed by the developer is overlapped with a pod containing developer between them, and the pressure of the developing roller ruptures the sealing part of the pod to spread the developer evenly between the two for development and transfer. It is a mechanism.

By the way, in this type of apparatus, the pod is dropped and set at a normal position on a positive sheet, and then a negative sheet is superimposed on top of the pod and sent to a pair of developing rollers, but the pod needs to be set properly.

That is, the pod is constructed by folding a flexible sheet, placing a developer therein, and sealing the folded sheet. When this pod receives pressure from a pair of developing rollers,
The seal part peels off, allowing the developer to spread. Therefore, the seal portion needs to be located on the upstream side in the conveyance direction when being held in the developing port-ra pair.

Conventionally, there has been a risk of developing errors in devices that do not have the function of checking the front and back of the pod, the front and back, and the positional deviation.

〔the purpose〕

The present invention has been made based on this background, and aims to eliminate the drawbacks of the above-mentioned conventional techniques and to eliminate developing errors by detecting pod positional deviations and inversions. Our goal is to provide an instant photographic device that can.

〔composition〕

To this end, the present invention is characterized in that a pod detection sensor is provided on the front side of the developing roller.

Embodiments of the present invention will be described below based on the drawings.

Figure 1 shows the overall configuration of an instant photographic device that uses peel-apart instant photographic film. This device is an optical system that irradiates illumination light while scanning the document surface and forms an image at a predetermined position (exposed surface). It is composed of a unit 1, and a conveying unit 2 which conveys a negative sheet to a predetermined position, exposes it, aligns it with a positive sheet, overlaps it, spreads a developer therebetween, and transfers and forms an image onto the positive sheet.

The optical system unit 1 consists of a contact glass 3, a first traveling body 4 consisting of a first mirror and a light source, a second traveling body 5 consisting of a second mirror and a third mirror, a lens 6, and a fourth mirror and a fifth mirror. Third traveling body 7 and sixth mirror 1
It is composed of 0 etc. The light source included in the first traveling body 4 is a fluorescent lamp (preferably a color rendering lamp for better color reproduction), etc., and scans an original placed face down on the contact glass 3 parallel to the contact glass 3. irradiate while The second traveling body 5 is scanned in the same direction at half the speed of the first traveling body, keeping the optical path length constant.

The magnification and conjugate length during zooming are adjusted by moving the lens 6 and the third traveling body 7 (dotted chain line in FIG. 1).

The original reflected light is the first. reflected by the second and third mirrors,
Furthermore, the lens 6, the fourth lens. Fifth. The light passes through the sixth mirror and is subjected to slit exposure at the exposure section IA.

Further, a light shielding cover 8 that covers around the lens and a light shielding cover 9 defined on the optical system bottom plate are provided. The light-shielding cover 8 moves together with the lens 6 while contacting the fixed light-shielding cover 9 via a telescope or the like. By these means, flare 9 incident from the periphery of the lens 6 is prevented as much as possible.

Next, the transport unit 2 will be explained in detail along with its operation. The transport unit 2 includes a negative roll film feeding section, a fed out negative film cutter section, and a negative film! It consists of a group feeding/exposure section, a positive 1 feeding section, a pod supply section, and a developing section. As will be described later, a negative film 64 containing a positive sheet and a circular film is housed in a roll in a light-shielding container 63.
is conveyed onto the temporary guide 24 by the rotation of the pull-out roller pair 18a, 18b and further by the rotation of the intermediate roller 27.

When the leading edge of the conveyed negative film 64 is detected by the sensor 25 or after a certain period of time, the first traveling body 4
The second traveling body 5 is scanned, and exposed at the exposure portion A on the guide plate 24 to form a latent image.

The exposure section A is a flat surface spanning the slit area, and is provided at the same level as or higher than the nip height of the pair of pull-out rollers 18 and the pair of intermediate rollers 27. Further, the circumferential speed of the intermediate roller pair 27 is set to be slightly faster than the circumferential speed of the pull-out roller pair 18, and the rollers of the pull-out roller pair 18 are provided with an overrun mechanism.

As described above, the negative film can be conveyed with some tension on the exposure section A, and can be conveyed while being brought into close contact with the guide plate 24, so that the optical path length to the negative film surface and the conveyance speed can be kept constant.

The negative film exposed for a certain length and on which a latent image has been formed is temporarily stopped, and then the rotary blade 20a rotates while contacting the fixed blade 20b and is cut into sheets.

The above-mentioned stop timing is determined by counting the time after the sensor 25 detects the leading edge of the negative film.

Although the optical system scanning speed changes due to magnification change, the negative film transport speed is constant, so if the film is stopped and cut after a certain time (1) after the leading edge of the film is detected, a negative sheet of a certain length can be obtained.

Therefore, the rear end of the cut negative sheet is at least the distance from the exposure position W, A to the tip of the fixed blade 20b (
This distance G) cannot form a latent image, but this distance G is longer than the distance D (in Figure 2) from the rear edge of the positive sheet to the rear edge of the image area transferred onto the positive sheet, which will be described later. If you arrange the exposure position A and the cutter so that it is small, it is an area where image formation is unnecessary in any case.
It is possible to prevent wastage of negative film (cutting it to a length longer than necessary), and the above-mentioned problems can be solved.

Similarly, a latent image cannot be formed at the leading end of the cut negative sheet at least at a distance greater than the distance from the detection position by the sensor 25 to the exposure position A (this distance is defined as H), but H is from the leading end of the positive sheet, which will be described later. By arranging the exposure position A and the sensor 25 so that the distance to the leading edge of the image portion to be transferred onto the positive sheet is smaller than the distance C (in FIG. 2), it is possible to prevent waste of negative film.

Furthermore, in the above method, since the negative film is cut after the exposure is completely completed, it is possible to prevent the transport speed from changing due to impact caused by cutting during exposure.

The cut negative sheet is turned about 180° by a roller 28 and a guide plate 29, and then conveyed by a roller 26 until its leading end abuts a pair of developing rollers 30.

The above-mentioned conveyance, exposure, and cutting of the negative films and sheets are carried out inside the machine in a dark place while shielding external light with an exterior or the like.

Unlike negative sheets, positive sheets are not photosensitive and can be inserted from outside the device. In this embodiment, multiple positive sheets 7
1 is stored in the cassette 35, and this is attached from the bottom right of the main body. The stacked positive sheets 71 are separated and conveyed one by one by a feeding roller 36 and a separation device not shown in the figure.The separated positive sheets 71 are conveyed by an insertion roller 38 to between guide plates 39 and 40, and the leading edge is connected to a sensor. 37
It stops after a certain period of time detected by , that is, when the leading end hits the nip between the pair of developing rollers 30 .

Reference numeral 101 denotes a discharge port sensor, which is configured to detect the presence or absence of a sheet at the discharge port, and if a sheet is present at the discharge port, prohibit the copying operation and display a warning.

FIG. 8 is a diagram showing the vicinity of the developing roller pair 30 of the apparatus of this embodiment. By abutting both the negative sheet 70 and the positive sheet 1 against the nip of the pair of single developing rollers 30, they are aligned. Therefore, a complicated positioning device is not required, and the device can be made inexpensive and compact. The developing roller pair 30 is composed of a pair of pressurized metal straight rollers. With the development roller pair 30 stopped, the leading edge of the positive sheet 71 hits the nip before the negative sheet 70, and the positive sheet 71 stops and waits.

Next, by winding up the tape, which will be described later, only one pod falls from the container. As shown in FIG. 8, the guide plate 44 is inclined downward with respect to the developing roller pair 30,
In addition, since the guide plate 40 is also tilted downward or kept horizontal, the fallen pod 15 slides on the guide plate 44, falls into the gap between the developing roller pair 30 and the guide plates 44 and 43, and falls onto the stopped positive sheet 71. The tip of the pod hits the nip between the developing roller pair 30 and stops (arrow F).
Thereafter, the negative sheet 70 that has been exposed is conveyed between the guide plates 43 and 44 by the roller 26, passes above the stopped pod, and its leading end hits the nip.

Feeding, cutting, and exposing the negative film are performed when the sensor 37 shown in FIG. 1 does not detect the positive sheet 71, or when the sensor 80 shown in FIGS. 1 and 8 does not detect the passage of the pod. Controlled to prohibit. For example, malfunctions such as forgetting to insert the positive sheet 71 or malfunctioning pod supply can be prevented by disabling the print SW from being pressed. Similarly, the sensor 37 is connected to the positive sheet 7.
1 is not detected, by controlling the supply of the pod 15 to be prohibited, it is possible to prevent wasteful consumption of the pod 15 and the negative film 64 due to poor conveyance of the positive sheet 71.

After the negative sheet 70, positive sheet 71, and pot holder 5 are brought into contact with the nip and their tips are aligned, the developing roller pair 3
0 rotates and conveys the champion together, and at this time, the aforementioned pod is crushed and the developer is spread between the negative and positive sheets, and development (transferring and fixing the negative latent image to the positive sheet) is performed. The developing roller pair 30 is required to have highly accurate straightness in order to spread the developer uniformly (with a constant thickness).

Both the developed negative and positive sheets are discharged to the discharge tray 46 while being closely adhered by the developer, and when the positive sheet is peeled off after several tens of seconds, a positive color image is transferred onto the positive sheet.

Maintenance (cleaning, etc.) of the developing roller can be carried out by rotating the pair of developing rollers 30, which is made up of the frame 52 and the ejection guide 53, to the left around the shaft 54 with the tray 46 removed. Do it in the state that appears.

Next, the film used in the image forming method of this apparatus will be explained. This instant photographic film consists of a pod consisting of a pack containing a negative film, a positive sheet (photographic paper), and a developer. The negative film is exposed to light by the optical system unit, and then its leading edge is brought together with the positive sheet, and the negative film is passed between a pair of developing rollers 30 which are pressed together with the positive sheet and the pod. At this time, the sealing part of the pack is torn, and the developer is evenly spread between the positive sheet and the negative film. Development starts now, the negative develops color in a few tens of seconds, the coloring agent is transferred to the positive sheet, and then when the negative film is peeled off from the positive sheet,
A positive color image is obtained on a positive sheet.

As shown in Figure 2, the positive sheet has a removable sight rail 1), for example, a paper tape-like band pasted on the stamp surface, to prevent the developer that has flowed and spread from leaking from both ends. provided. Further, a mask sheet 12 forming the boundaries of the image forming area of the positive sheet may be releasably attached to the four sides of the positive sheet.

The sight rail 1) has a constant thickness in the transport direction (approximately 0.1 wm), so when the negative film and positive sheet that are placed between the pressurized rollers pass, the developer is spread between the two sight rails. The thickness of the liquid remains constant due to the high viscosity of the liquid.

A trap 13 is provided at the rear end of the positive sheet to receive and store the developer, and is removable so that excess developer is not squeezed out of the positive sheet and contaminates rollers and the like. Wedges 14 having a thickness of approximately 2 mm are provided at both ends of the trap. This causes the spread developer to accumulate between the wedges 14 on the trap.

The length of the pod sealing portion must be narrower than the sight rail that prevents the developer from flowing out in the width direction. It takes some distance for the developer to spread to both site rails of the positive sheet. Good image formation (
(transfer) cannot be performed, so a latent image is formed on the negative by shifting it by that length from the leading edge of the negative (C). Further, an extra length is provided at the trailing end corresponding to the trap length of the positive sheet in order to prevent excess developer from being squeezed out from the trailing end and adhering to the developing roller (D).

Therefore, since the length of the negative sheet is greater than 0 and is equal to the distance from the leading edge of the positive sheet to the rear end of the trap 13, a latent image is actually formed on the cut negative sheet as shown in FIG. Tip (C) from length (L),
A slight extra length is provided at both the rear end (D).

For positive sheets, a mechanism is provided to keep the interval between the pair of developing rollers 300 at a constant ff1 (approximately 0.10) in the image length section, and forcibly increase the interval (approximately 2 fl) when the trailing ends of both sheets are discharged. Accordingly, the sight rail 1) and the wedge 14 can also be deleted.

Next, the supply of negative film sheets and pods will be explained. As shown in FIGS. 3 and 4, the negative film container is made by folding a light-shielding cardboard, plastic sheet, or a layer of aluminum foil 21 into the grooves of the resin-molded side end members 22. inserted and assembled. The side end member 22 is provided with a boss portion 23 that rotatably supports the inner diameter of the core of the film shaft. The film guide 4 part 19 is made to protrude from the outside of the main body, and a long pile velvet 65 is pasted on the inside to prevent light from entering the internal film. The leading end of the guide part can ensure that the leading end of the film is inserted between the rollers, and when the rollers are closed, the initial length of the leading end of the film that is holding the film can be regulated as shown in FIG. A label may be attached to the outside of the container so that the type of film currently installed can be visually checked from outside the device.

In this apparatus, a plurality of pods, their storage containers, and a pod supply mechanism are integrally provided at the bottom of the negative film container. If the type of negative film changes (for example, color, black and white, OHP, etc.), the developer sealed in the pod must also be changed, but since the negative film and pod are attached together, the negative film and can prevent the use of different combinations of pods.

As shown in FIGS. 7 and 8, a chamber 81 is provided at the bottom of the negative film container, and a tape 83 folded into an accordion shape and a plurality of pods 15 are housed inside the chamber 81. Each pod 15 has an accordion-shaped tape 83
The FA is removably affixed across the width t in the trough. The tape 83 is wound around the reel 84 from the opening J of the chamber 81 using the lower side of the bottom plate 82 . The reel 34 is rotationally driven by a drive (not shown) inside the container or the machine body.

As mentioned above, the tip of the positive sheet 71 is connected to the developing roller pair 3.
After reaching zero, the reel 84 winds up the tape 83 for a certain length. The tape 83 and the pod 15 move as shown in FIGS. 7(a)-(b)-(c) by scraping, and the bottom plate 82 bends the tape 83 by about 90'', resulting in one pod 15. From tape 83 to aH
be done.

The pod 15 subjected to ml IEI falls due to gravity along a trajectory shown by arrow F in FIG.

The same number of pods 15 are provided as the number of negative sheets to be cut from the roll. Therefore, when the pod 15 is used up, the negative film is used up, and the pod 15 and the negative film 64 are not wasted.

Furthermore, since one pod 15 is consumed for each negative sheet, the remaining amount of the pod 15 and the remaining amount of negative film (sheets) are the same. Further, since the tape 83 is wound up to a certain length for each copy, the remaining W of the negative film can be displayed from the display window 86 by marking numbers on the tape 83 at the intervals.

In addition, the tape is painted black (other parts are white) so that when the pod 15 disappears, the end of the tape is detected by a reflective sensor 85 fixed inside the main body, and the sensor 85 detects this. When this happens, if the print SW is disabled or otherwise controlled, empty feeding of the negative film and pod can be prevented. Furthermore, if the sensor 85 is set to emit the same signal as when detecting the black painted part even when there is no negative film cartridge, forgetting to insert the negative film cartridge can be prevented.

As mentioned above, the present invention employs a replication sequence that verifies the correct set of pods.

The overall operation for this is as follows.

First, the positive sheet 71 is fed by the roller 36, and the roller 38
The sensor 37 detects the leading end, and the developing roller pair 30 is fed until the leading end hits the developing roller pair 30. When the positive sheet 71 is ready, the reel 84 is driven, and one pod 15 is dropped and set on the positive sheet 71. Pod 1 with sensor 80
After confirming that the negative film 64 has passed, feeding of the negative film 64 is started.

In the configuration shown in FIG. 8, when the sensor 80 detects the pod 15, it is assumed that the pod is set in the fixed position.
An example of checking the position of 5 is shown in FIGS. 9 and 10.

The example shown in Fig. 9 is a white pod with a black mark; Fig. 9 (a) is a developed view of pod 15,
FIG. 2 is a side view showing the detection and transport section of the pod.

A photosensor 200 is provided at a position corresponding to the black mark 15a of the normally set pod 15, and can detect when the pod 15 is shifted sideways or diagonally.

In the example shown in FIG. 10, the top surface of the pod 15 is exposed aluminum foil 7, and phrases are detected by contacting it with an electrode.

FIG. 10(a) is a developed view of the pod 15, the same figure (bl is a side view showing the detection conveyance section of the pod, and FIG. 10(C) is a wiring diagram of the sensing electrode.
is the sensing electrode.

If the negative film 64 is jammed during exposure after the positive sheet 71 and the pod 15 are set normally and the negative film 64 is fed out, the conveyance of the film is stopped when the jam is detected. Since the film has not yet been cut at this time, if the film is taken out as it is, there is a risk that the unexposed negative film 64 will be drawn out from the cartridge 63 and wasted.

There, a jam is detected, the film is stopped, and
Activate the cutter, cut the film, and easily remove the jammed film.

If a jam occurs after the film has been exposed and cut, it is sufficient to simply stop the conveyance.

When the negative film 64 is jammed, after removing the jammed film, the positive sheet 71 and the pod 15 are correctly set in front of the developing roller pair 30. Therefore, when copying after recovering from a jam, the operations of transporting the positive and setting the pod 15 are omitted, and the operation is performed by pulling out the negative film 64.

In the case of a jam in the negative film 64, a negative film jam flag is set in the sequence program.

If this flag is checked and set at the time of copy start, the pod 15 and positive sheet 71 will not be newly set. It goes without saying that the positive sheet 71 and pod 15 are detected and confirmed at this time.

If the pod 15 is not set in the normal position, the machine will stop as in the case of a jam, so remove the developing roller unit 52, remove the positive sheet 71 and the pod 5, and place the pod 15 on the pod tray 202 ( After installing the developing roller pair 30 (Fig. 1), when starting the copying operation, check the pod 15 in the pod 1-ray 202, and if there is a pod 5, move the pod 15 to the storage container. The pods in the pod tray 202 are dropped without being taken out. Therefore, the pod 15 does not need to be wasted.

Effect C] As described above, according to the present invention, it is possible to detect the accurate placement of pods and eliminate developing errors.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of an instant photographic device according to an embodiment of the present invention, Fig. 2 is an external view of a positive sheet, Fig. 3 is an external view of a negative film container, and Fig. 4 is a partial view of the same. 5 is an external view of the negative film container with the tip of the negative film/C lume pulled out, FIG. 6 is a diagram showing the area between the latent image forming boxes of the cut negative sheet, and FIGS. 7(a), Cb ),
(C) is a diagram showing a situation in which pods are supplied from the pod storage section, FIG. 8 is a side view showing a confluence section of a negative sheet and a positive sheet, and FIG. 9. FIG. 10 is a diagram showing different examples of checking the position of the pod. FIG. 9+a) is a developed view of the pod, FIG.
Figure (al) is a developed view of the pod, Figure (b) is a side view showing the detection and transport part of the pod, Figure (C) is a wiring diagram of the detection electrode, and Figure 1) focuses on the pod tray part. This is an enlarged view. 15... Pod, 18... Roller pair, 24... Guide plate, 25... Sensor, 27... Intermediate roller pair,
30...Developing roller pair, 37...Positive sheet detection sensor, 64...Negative film, 70...Negative sheet, 71...Positive sheet, 80...Negative sheet, pod sensor, 81...Pod storage Part (chamber), 8
3...Tape, 85...Pod remaining amount sensor, 86.
・・Display window, 101 ・・Discharge port sensor, 200.20
1... Pod sensor, 202... Pod tray, A
...Exposure position. Fig. s2 Fig. 3 OF fs Fig. 5 Fig. 7 Fig. 9 (b) Fig. 10 Cσ Fig. 1I procedural amendment (voluntary) Otsu, 1988 2nd day of the month

Claims (2)

[Claims] (1) A peel-apart instant photographic device that performs development by aligning independent negative sheets, positive sheets, and pods and passing them between a pair of developing rollers, including means for detecting the position of the pods. Instant photography device featuring features. (2) When it is detected that the pod is not in the normal position,
An instant photographic device according to claim 1, further comprising a control section for prohibiting a copying operation.