JPS63298244A - Instant photographic device - Google Patents

Abstract

PURPOSE:To easily cut a photosensitive film to appropriate length by providing a cutting device for cutting the cutting length of one sheet of photosensitive film to length in which an image is formed, and to a length which has added length in which a developer squeezed out of a pod spreads to prescribed image with, and the length of a containing part for containing a surplus developer. CONSTITUTION:In an instant photograph of a peel/apart system of a constitution for cutting one sheet each from a rolled photosensitive member 64, this device is provided with cutting devices 20a, 20b for cutting the cutting length of one sheet of photosensitive member 64 to length L in which an image is formed, and to length which has added length C in which a developer squeezed out of a pod 10 by a developing roller 30 spreads to prescribed image width, and the length D of a containing part 13 for containing a surplus developer, provided on a receiving member 71. In such a way, the photosensitive film 64 can be cut easily to suitable length for forming an image.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a peel-apart type instant photographing device.

(Prior Art) Conventionally, most peel-apart type instant photography devices have been of the type of small camera.

(Objective) The object of the present invention is to provide a stationary peel-apart type instant photographic device that cuts photosensitive film into appropriate lengths.

(Structure) The present invention is designed so that the cut length of a sheet of photosensitive film is the length at which an image is formed, the length at which the developer squeezed out from the pod by the developing roller spreads to a predetermined image width, and the length at which the image is formed on the receiving sheet. This is a peel-apart type instant photographic device that is equipped with a cutting device that cuts the device into a length that is the sum of the length of the storage section that accommodates excess developer. An image forming apparatus to which the present invention is applied will be described below based on one embodiment.

FIG. 1 shows an overall configuration diagram of an instant photographic apparatus using a peel-apart type instant photographic film according to an embodiment of the present invention. The apparatus of this embodiment includes an optical system unit 1 that irradiates illumination light while scanning the document surface and forms an image at a predetermined exposure position, and a negative film that is conveyed to a predetermined position and exposed, and then aligned with a positive sheet. It is composed of two units: a conveyance unit 2, which transfers and forms an image onto a positive sheet by spreading the developer therebetween.

The optical system unit 1 includes contact glass 3. A first traveling body consisting of a first mirror and a light source 4. Second mirror.

5. A second traveling body consisting of a third mirror. It is composed of a lens 6, a fourth mirror 7, and the like. The light source on the first traveling body 4 is a fluorescent lamp (preferably a color rendering lamp, etc. for good color reproduction), etc., while scanning the document placed face down on the contact glass s parallel to the contact glass. irradiate. The second traveling body 5 is scanned in the same direction at a speed of half the speed of the first traveling body, and the optical path length from the document surface to the exposure drum is kept constant.

The reflected light from the original is the first. Second. It is reflected by the third mirror, and then passes through the lens 6 and the fourth mirror 7 to the exposure drum 28.
The top is exposed to slit light. The light-shielding cover 8 is provided with a rod-shaped slit 61 in front of the lens to equalize the amount of light in order to give the exposure portion a uniform amount of exposure in the width direction. Also,
Minimum width slit 6 necessary to suppress flare light as much as possible
2 is provided on the bottom plate, and the necessary exposure amount (illuminance 1ux x time 5ec
) can be given to negative film.

The operation of the transport unit 2 will be explained. The conveying unit 2 is composed of a negative roll film feeding section, a part of a cutter for unreeled negative film, a sheet-shaped negative film conveying section, an exposure section, a positive sheet conveying section, and a developing section.

In this apparatus, a roll of negative film having the same width as the positive sheet is stored in a light-shielded film container 63, pulled out each time an image is to be formed, and automatically cut into a predetermined length.

The negative film gripped by the pair of pull-out rollers 18a and 18b is the pair of pull-out rollers 18a.

18b1 is further conveyed 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 rotary blade 2
The blade 0a rotates downward while contacting the rotary blade 20b to cut the negative film 64 into sheets. The distance between this cutting position and exposure position A, which will be described later, is set longer than the distance from the leading edge of the latent image created on the negative sheet to the trailing edge of the negative sheet, and the conveyance speed changes due to shocks caused by cutting during exposure. prevent

After cutting, the negative sheet is conveyed by an intermediate roller 27,
The light is sent to the exposure drum 28 and exposed through an optical system at an exposure position A on the drum to form a latent image.

The optical system described above starts scanning when the leading edge of the image area of the negative sheet reaches the exposure position A.

The exposure drum 28 is driven to rotate in synchronization with the scanning speed of the optical system, and belts 29 are stretched around both ends of the drum 28 with a constant tension to rotate together.

Both ends of the negative sheet outside the image area are connected to the belt 29 and the drum 28.
is bitten by the drum 28 and rotates at the same speed as the drum 28,
After the direction is changed by about 180 degrees, the intermediate roller 27 and the roller 26 transport the sheet until the leading end abuts the developing roller 30 .

The circumferential speed of the exposure drum 28 is set to be slightly faster than the circumferential speed of the intermediate roller 27, and the intermediate roller 27 is provided with an overrun mechanism. Therefore, the negative sheet is exposed to the exposure drum 2.
8 and is being conveyed with some tension. Further, by wrapping the sheet around the drum 28, curls in the width direction can be corrected and the sheet can be brought into close contact with the exposure drum 28, and the optical path length and conveyance speed to the negative sheet surface can be kept constant. The above-mentioned conveyance, cutting, and exposure of 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, so they can be inserted from outside the device. In the apparatus of this embodiment, the positive sheets are manually inserted one by one to the left along the guide plate 35 at the lower right of the main body. This eliminates the need for paper feed, separation devices, paper feed cassettes, etc., making the device compact and inexpensive.

As shown in FIG. 8, the positive sheet is inserted along the lower guide plate 35 and both side guides 36, and when the leading end is detected by the sensor 37, the insertion roller 38 rotates. The rollers of the insertion roller 38 are provided at locations where they grip only the outer ends of the pod so as not to crush the pod attached to the leading edge of the positive sheet. The positive sheet is conveyed between the guide plates 39 and 39 by the insertion roller S8, and is stopped when the leading end hits the nip between the developing roller pair 30. A light-shielding mylar 66 with a telescope 67 or the like attached to its tip is pasted over the entire width of the guide plate S9, and is pressed against the guide plate 40 with a light downward force due to the rigidity of the mylar itself. The positive sheet is conveyed while being rubbed by the telescope 67 at the tip of the Mylar 66 and the guide 40. Further, the positive conveyance path is bent at at least one place.

By shielding the positive transport path from light as described above, it is possible to prevent the negative sheet from being exposed to external light entering from the transport path.

FIG. 9 is a diagram showing the vicinity of the developing roller pair 3o of the apparatus of this embodiment. By abutting both the negative sheet and the positive sheet against the nip of the pair of single developing rollers 30, the two are aligned. Therefore, a complicated positioning device is not required, and the device can be made inexpensive and compact. Developing roller pair 3
0 consists of a pair of pressurized metal straight rollers. With the developing roller pair 30 stopped, the tip of the attached pod 1o hits the nip before the negative sheet 70, and the above-mentioned positive sheet 7 stops and waits. Thereafter, the negative sheet 70 that has been exposed is conveyed between the guide plates 43 and 44 by the roller 29, passes above the positive sheet 71, and its leading end hits the nip. The leading end of the guide plate 43 is provided at the upper part between the leading end and the rear end of the pod, and prevents the negative sheet from entering under the pod.

The feeding, cutting, and exposure of the negative film are controlled so as to be prohibited when the sensor 37 shown in FIG. 8 does not detect a positive sheet. For example, malfunctions such as forgetting to insert a positive sheet can be prevented by disabling the print SW from being pressed.

After the two are brought into contact with the nip and their tips are aligned, the pair of developing rollers 30 rotates and conveys both together. At this time, the aforementioned pod is crushed and the developer is spread between the two, forming a developing (negative latent image). is transferred to a positive sheet, and then transferred to a positive sheet). The developing roller pair 30 is required to have highly accurate straightness in order to spread the developer uniformly (with a constant thickness). Therefore, the elastic blade 45 is always in contact with the discharge portion of the developing roller pair 30 with a constant pressure, scraping off the developer that has protruded and adhered to the developing roller pair 30, and causing the developer to stick and lose its straightness. to prevent

When the developing roller drive source is shared with the exposure section drive source, load fluctuations at the time of starting the developing roller and impact when the positive sheet and negative sheet pass the developing roller pair 30 affect the conveyance speed of the exposure section. Therefore, similar to the cutter position described above, the distance from the exposure position A to the nip between the developing rollers is set to be longer than the distance from the leading edge of the negative sheet to the trailing edge of the latent image formed on the negative sheet to prevent the above-mentioned adverse effects. be able to.

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.

If there is a problem with the conveyance of negative or positive sheets inside the machine,
The operator moves the cover 48 (which is shielded from light when closed) and the guide plates 49 and 50 to the position shown by the dotted chain line in Figure 1.
Each can be rotated (opened) and the jammed sheet can be removed from the machine.

Maintenance (cleaning, etc.) of the developing roller can be performed by rotating the developing roller pair 30, which is made up of the frame 52 and the discharge guide plate 53, to the left around the shaft 54 with the tray 46 removed. Do it with it exposed.

Next, the film used in the image forming method of this apparatus will be explained. The instant photographic films used in this device are negative film and positive sheet (photographic paper).
Consists of. The negative film is exposed by the optical system,
Thereafter, the leading edge of the developing roller is brought together with the positive sheet and passed between a pair of developing rollers that are pressurized together with the positive sheet.

As shown in FIG. 2, a pod 1o consisting of a pack containing developer is attached to the leading end in the feeding direction of the positive sheet, and when it passes the above-mentioned roller pair 3o, the sealing portion E of the pack is attached to the positive sheet. cleaves, and the developer is spread evenly between the positive sheet and negative film. This starts development, and the negative develops color in several tens of seconds, the coloring agent is transferred to the positive paper, and then when the negative film is peeled off from the positive sheet, a positive color image is obtained on the positive sheet.

In addition to the above-mentioned pod 10, the positive sheet has a sight rail 11 that can be peeled off from the image forming surface to prevent the developer that has flowed and spread from leaking from both ends, and in this embodiment, a strip of paper tape is attached to the stamp surface. The following items are 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 11 has a constant thickness of approximately 0.1 mm in the transport direction, so that when the negative film and positive sheet, which are aligned between the pressurized rollers, pass, the developing image is spread between the two sight rails. The thickness of the agent remains constant due to the high viscosity of the liquid. A trap 13 is provided at the rear end of the positive sheet to store and receive a removable developer so that excess developer is not squeezed out of the sheet and contaminates rollers and the like. Wedges 14 having a thickness of about 2 mm are provided on 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 width between the edge controllers and the sight rails to prevent 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. Since good image formation (transfer) cannot be performed over the entire width by this distance, a latent image is formed on the negative by shifting it from the leading edge of the negative by the length (C). Furthermore, there is an extra length C at the rear end corresponding to the trap length of the positive sheet to prevent excess developer from being squeezed out at the rear end and attached to the developing roller.
D) is provided.

Therefore, the length of the negative sheet is equal to the distance from the tip of the pod 1o to the rear end of the trap 13. The interval between the pair of developing rollers is set to a constant interval of image length ff1 (approximately 0.1 nm).
), and the sight rail 11, trap 13, and wedge 14 can also be eliminated by providing a mechanism that forcibly increases the gap (about 2 mm) when the rear ends of both sheets are discharged.

From the above, as shown in Figure 7, the cut negative sheet has a tip (C) that is longer than the length at which a latent image is actually formed.
A slight extra length is provided at both the rear end (D).

Next, feeding of the negative film sheet will be explained. As shown in FIGS. 3 and 4, the negative film container is made of light-shielding cardboard, plastic sheet, or aluminum foil layered on top of these, folded at 21, and placed in the grooves of both end members 22 molded with resin. inserted and assembled. The side end member 22 is provided with a boss portion 2S that rotatably supports the far inner diameter of the film shaft. The film guide part 19 is made to protrude from the outside of the main body, and long-pile velvet 65 is pasted on the inside over the entire width to prevent light from entering the film inside.

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 sandwiching 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.

Put the negative film into a light-tight box with a film exit,
A method in which the leading edge of the film is pulled out between the pull-out rollers, fed between the rollers by hand, and then the device cover is closed is generally used in plate making machines, but in the device of this example, there is no need to do this more than necessary. Autoloading (automatically feeding the leading edge of the film between the pull-out rollers) can be performed simply by placing the film container 63 into the device without wasting the film by pulling it out.

As shown in FIG. 5, when the cover 16 of the container storage section, which can also have a window 24, is opened, the pin 17 that pushes up the pressure levers of the pull-out rollers 18a and 18b rotates in accordance with the rotation angle of the cover. Since the pressure roller 18a can be separated from the drive roller 18b, the film container 17 can be attached and detached. If the film is pulled out at least to a position where the leading edge of the film coincides with the leading edge of the film guiding portion 19 of the container, the film can be reliably positioned between the pulling rollers 18a and 18b. When you take out the container to change the type of film midway through, the film will be removed by the rotary blade 20.
Since the film is pulled out to the position of the rotary knife consisting of the fixed blade 20b, the part beyond the notch in the film guiding part will be exposed to light and become unusable, so the distance to the rotary knife must be as short as possible. As long as this exposed length is less than the distance from the positive paper pod to the tip mask, even when it is used again, this exposed part will not be included in the image and the film will not be wasted. .

In this embodiment, the positive sheet is manually fed, but it is also possible to feed it automatically from a cassette or the like. Furthermore, in this example, a peel-apart type material is used in which the photosensitive film is negative and the receptor sheet is positive.
It is not necessarily limited to this.

(Effects) According to the apparatus of the present invention, a photosensitive film can be cut into a length suitable for image formation.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a peel-apart instant photographic device according to an embodiment of the present invention, FIG. 2 is a perspective view of a positive sheet film, and FIG. 3 is a perspective view of a negative film container.
Fig. 4 is a sectional view of a negative film container, Fig. 5 is a configuration diagram of a negative film storage section, Fig. 6 is an explanatory diagram of a negative film drawer, Fig. 7 is a perspective view of a cut negative film, and Fig. 8 is a sectional view of a negative film container. The figure shows the positive sheet feeding section, and FIG. 8 is an explanatory diagram of the vicinity of the developing roller. 1... Optical system unit, 2... Transport unit, 3.
...Contact glass 5.4...First running body, 5...
-Second traveling body, 6...lens, 7...4th mirror,
8... Light shielding cover, 10... Pod, 11... Sight rail, 12... Mask sheet, 1G... Trap, 14... Wedge, 16... Container storage section cover, 17 ...Pin, 18a...Pressure roller, 18
b... Drive roller, 19... Film guiding section, 20
a ”・Rotating blade, 20b... Fixed blade, 21... Light shielding body, 22... End member, 23... Boss part, 24...
・Window, 25...Sensor, 27...Intermediate roller, 28
...Exposure drum, 29...Belt, 30...Developing roller pair, 31.32.33.34.35...Guide plate, 36...Side guide, 37...Sensor, 38
...Insertion roller, 39.40, 41.42.43.4
4...-guide, 45...elastic body blade, 46-
...Ejection tray, 48...Cover, 49...Guide plate, 50...Guide plate, 52...Frame, 53...
Discharge guide plate, 54...shaft, 61.62...slit, 63...film container, 64...negative film, 65...velvet, 66...mylar, 67...
・Telemp, 70...Negative sheet, 71...Positive sheet.

Claims (1)

[Claims] In peel-apart instant photography, in which a roll of photosensitive material is cut one by one, the developer squeezed out of the pod by the developing roller is cut to the length where an image is formed. 1. An instant photographic device comprising a cutting device that cuts the image to a length that is the sum of the length until the image is expanded to a predetermined image width and the length of a storage section provided in the receiving member for storing excess developer.