JPH01216331A - Instant photographic device - Google Patents

Abstract

PURPOSE:To reduce deviation between a latent image formed surface and an image receiving surface by specifying a cut spot for a negative film by means of a sensor which detects the leading edge of the stuck negative sheet and cutting the negative film based on the detected result. CONSTITUTION:When the leading edge of the negative sheet 11 or a long roll paper 12 is detected by means of the sensor 25 or when a certain time lapses after that, a 1st traveling body 4 and a 2nd traveling body 5 in an optical system unit 1 are scanned and the negative sheet 11 is exposed in an exposure part on a guiding plate 24 to form a latent image. The negative sheet 11 exposed for a certain period, where the latent image is formed, is stopped once with a carrier sheet 12 and the carrier sheet 12 is cut in a sheet shape. The above-mentioned stopping and cutting is performed when the sensor 25 detects the leading edge of the stuck negative sheet 11 or when a certain time lapses after that. Thus, the deviation between the latent image formed surface and the image receiving surface at the time of developing can be suppressed to the amount nearly equal to an error in cutting the negative film once.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a peel-apart type instant photographic device configured to cut a roll of negative film one by one.

[Prior art]

An instant photographic device using this kind of peel-apart type instant photographic film pulls out a roll of negative film (photosensitive member) to the exposure position, and then connects it to the exposed negative sheet (cut negative film) at a predetermined position. The positive sheet being conveyed is placed one on top of the other with a pod containing developer sealed in between, 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 the past, negative sheets were made into long rolls,
The cutting timing was measured by detecting the leading edge of the film.

However, when cutting a negative film made by pasting negative sheets at predetermined intervals on a carrier sheet made of long paper at the above timing, the error in the length of each cut is ±l.
This may occur to the extent of am.

This is caused by sensor detection errors and the like.

Therefore, if 36 negative sheets are attached to a negative film, the distance from the tip of the negative film (the tip of the long paper) to the tip of the negative sheet, which is cut at the 36th sheet, is ±3.
There is a risk of deviation within a range of 6 mm. If this misalignment occurs, when the positive sheet and the leading edge are aligned and developed, the latent image forming surface and the image receiving surface are misaligned by this amount, resulting in defective image transfer, resulting in a problem that good image formation cannot be performed.

〔the purpose〕

The present invention solves the above-mentioned drawbacks of the conventional example, and reduces the misalignment between the latent image forming surface and the image receiving surface caused by cutting the film when using a roll negative film constructed by pasting a negative sheet onto a long paper. The purpose of the present invention is to provide an instant photographic device capable of

〔composition〕

For this purpose, the present invention is characterized in that it is provided with a sensor that detects the leading edge of the negative sheet and a cutter that cuts the negative film based on the detection result.

In other words, the cut point of the negative film is specified by a sensor that detects the tip of the attached negative sheet.

The present invention will be described in detail below, but before explaining specific examples, an outline of an instant photographic device and a negative film (consisting of a negative sheet pasted on a long sheet of paper), which is the premise of the present invention, will be explained. I will give an overview.

First, the image forming method of this apparatus will be explained.

The instant photographic film used in this device consists of a pack (hereinafter referred to as a pod) containing a negative film, a positive sheet (photographic paper), and a developer. The negative film is exposed to light and a latent image is formed by an optical system unit which will be described later. Thereafter, this latent image forming surface is aligned with the image receiving surface of the positive sheet, and a pod is inserted between them. The leading ends of the champion rollers are aligned and pass between a pair of developing rollers that are pressurized together. At this time, the rear end of the pod is opened by the roller pressure, and the developer flows out from inside and is spread evenly between the positive sheet and the negative film. Development starts now, the negative film develops color in a few tens of seconds, the colored side is transferred onto 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.

Next, the supply format will be explained.

As shown in FIG. 2, the negative film is cut into a sheet (negative sheet 11) having approximately the same area (-image forming area) as the positive sheet, and the latent image forming surface is placed on a long roll 12 called a carrier sheet. The tips (B
(part) can be pasted. This is wound into a roll, stored in a light-shielding storage container shown in FIG. 1, which will be described later, and pulled out each time an image is to be formed, and cut into a sheet at the position indicated by the dotted chain line in the figure with a cutter. In addition, since the negative sheet 11 is attached only to the tip, when it is rolled together with the roll 12, the negative sheet 11 is generated due to the difference in the winding diameter due to the thickness of each sheet.
It can prevent wrinkles etc.

As the image receiving sheet used in this apparatus, as shown in FIG. 3, a carrier sheet 13 has a positive sheet 14 having a required image receiving area attached to the carrier sheet 13 so that the image receiving surface can be separated from the outside. If a positive image-receiving sheet with the same area as the carrier sheet 13 is used, the carrier sheet can be made unnecessary; however, if the positive sheet 14 is thin (or if a transparent positive sheet is used), it is possible to remove the carrier sheet from the back side of the room during the development process. Light enters and a fogging phenomenon occurs.

For this reason, it is necessary to add a light shielding member to the positive sheet.
The carrier sea) 13 plays the role of this light shielding member.

The carrier sheet 13 (long roll 12) is
As shown in the figure, both negative and positive have the same width.

Same length and ahead of positive sheet 14 and negative sheet 11.

After that, allowance lengths C, D, E%C', D', and E' are provided on both sides. Negative sheet 11, pod 15 and positive sheet 1
4 is pressurized with its leading end aligned by a pair of developing rollers, but at this time the rupture part of the pod 15 is the rear end F, so
The developer does not spread over the entire length of the pod 15.

Further, after the cleavage, some distance is required for the developer to spread to both sides of the positive sheet 14. Since good image formation (transfer) cannot be performed over the entire width by the distance described above, image formation is performed by shifting by that distance (corresponding to C and C').

The developer is contained in the pod 15 in an amount larger than that necessary for image formation so that the developer is sufficiently distributed to the rear end of the pod 14. Remove excess developer from carrier sheet 12.13
It is collected at the rear end (corresponding to D and D') between the two to prevent it from adhering to the developing roller and contaminating the inside of the machine.

Finally, development will be explained.

The developing roller pair 30 is composed of a metal straight roller 30a and a metal stepped roller 30b as shown in FIG. 5, and both are pressed with an appropriate pressure.

Negative sheet 11 and positive sheet 14 are each carrier sheet 1
The side ends of 2.13 (corresponding to E and E' in FIG. 3) are caught in a part of the collar of the stepped roller 30b and conveyed. Pod 15 is inside the empty part, negative and positive sheets 1
1.14 and transported together. The developer that flowed out due to the rupture of the pod 15 has a high viscosity, so the shaded area 16
Each of the carrier sheets 12 and 13 is deformed (not bent) until it comes into close contact with the surface of the straight roller 30a and the stepped roller 30b, and both sheets are spread apart. For this reason, the thickness of the developer between the negative and positive sheets (approximately 0.
1m) is kept constant. In addition, in FIGS. 2 to 4, arrows indicate the conveyance direction of each carrier sea) 12, 13.

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 type instant photographic film. This device irradiates illumination light while scanning the document surface, and forms an image at a predetermined position if (exposure surface). Optical system unit, unit unit,
It is constituted by a transport unit 2 that transports and exposes a negative sheet to this predetermined position, further aligns and overlaps a positive sheet, 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. It is composed of a third traveling body 7, a sixth mirror 10, and the like. 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 the document placed face down on the contact glass 3 in parallel with 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, and the optical path length from the document surface to the exposure drum is kept constant.The adjustment of magnification and conjugate length when changing the magnification is performed using a lens. 6 and the third traveling body 7 (dotted chain line in FIG. 1).

The embroidery reflected light is the first. reflected by the second and third mirrors,
Furthermore, the lens 6, the fourth lens. Fifth. Slit exposure is performed at exposure position A via the sixth mirror.

Further, a light shielding cover 8 that covers the lens and a light shielding cover 9 fixed to the bottom plate of the optical system 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. These prevent flare light from entering from around the lens 6 as much as possible.

Next, the transport unit 2 will be explained in detail along with its operation. The a-feeding unit 2 includes a negative film feeding section (the negative sheet 11 and the long roll 12 to which it is attached are collectively referred to as negative film), a cutter section that cuts the fed negative film, and a negative sheet transporting section. exposure section,
It consists of a positive sheet transport section, a pod supply section, and a developing section.

The negative film stored in a roll in the 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.

In the conveyed negative film, when the leading edge of the negative sheet 11 or the long roll paper 12 is detected by the sensor 25, or after a certain period of time, the first traveling body 4 and the second traveling body 5 in the optical system unit 1 After being scanned, the negative sheet 11 is exposed to light at the exposure section A on the guide plate 24 to form a latent image.

In the exposure section A, a plane is formed by the guide plate 24 over the luminous flux region. carrier sea) 12 and 'negative sheet 1
1 is conveyed by a pair of pull-out rollers 18 and a pair of intermediate rollers 27 while being in close contact with the guide plate 24 with some tension.

However, since only the leading end of the negative sheet 11 is attached to the carrier sheet 12, the trailing end becomes free after passing through the pair of pull-out rollers 18, curls upward due to curling, and floats up.

Therefore, the optical path length becomes short at the rear end of the negative sheet 11, causing blurring and distortion in the latent image.

In order to eliminate the above-mentioned mismatch, in this apparatus, a target glass 21 is provided parallel to the guide plate 24 that forms the exposure area A and separated by a minute distance (about 1 to 2 squares). prevents it from floating up. 11 is a carrier sheet 12 with a constant long exposure and a negative sheet on which a latent image is formed.
The rotary blade 20a is then stopped once as the fixed blade 20.
b, and cuts the carrier sheet 12 (long roll paper) into sheets (hereinafter, these sheets will be referred to as negative sheet pieces to distinguish them from the negative sheet 11 itself).

The above-mentioned stopping and cutting are performed when the sensor 25 detects the leading edge of the attached negative sheet 11 or after a certain period of time.

In this embodiment, a carrier sheet 12 of a different color from the negative sheet 11 is used, and the difference in reflectance is detected by a reflective sensor. Since the negative sheets 11 are pasted at a constant interval L (L - the length of the carrier sheet 12 to be cut), if the carrier sheet 12 is cut at the above timing, the negative sheet 11 will be cut from the tip of the carrier sheet 12 of the cut negative sheet piece. The distance M to the leading edge (C in FIG. 3) and the distance from the rear end of the negative sheet 11 to the rear end of the carrier sheet 12 (D in FIG. 3) can always be kept constant.

As another example, punch holes 22 are punched in advance in the carrier sheet 12 at a constant interval l from the tip of the negative sheet 1-11 (
(shown in FIG. 2), by detecting this hole 22,
A similar effect can be obtained by measuring the cutting timing described above. The punch holes 22 may be replaced with markings of a different color from the carrier sheet 12.

The cut negative sheet pieces are transferred to a roller 28 and a guide plate 29.
After the direction is changed by approximately 180 degrees, the roller 26 transports the developing roller 26 until the leading end abuts against the developing roller pair 30 .

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

Unlike the negative sheet 11, the positive sheet 14 is not photosensitive and can be inserted from outside the apparatus.

In this embodiment, the positive sheets 14 are manually inserted one by one toward the left along the tray 35 at the lower right of the main body.

A carrier sheet 13 (hereinafter referred to as a positive sheet piece) to which a positive sheet 14 is attached is placed on a tray 35 and a guide plate 3.
6, and when the leading edge is detected by the sensor 37, the insertion roller 38 rotates and conveys the positive sheet piece between the guides Fi39 and 40. The insertion roller 38 stops after a certain period of time after the leading edge of the positive sheet piece is detected by the sensor 41, that is, when the leading edge hits the nip between the pair of developing rollers 30. The tip of the positive sheet piece hits the nip before the aforementioned negative sheet piece, and the positive sheet piece stops and waits at the opening 6 of the housing 65 of the pod storage container 64, which is provided integrally with the zero-order negative film storage container 63.
5a, the pod 15 is rotated by the rotation of the retainer 66.
Only one piece is released and falls.

As shown in FIG. 1, the guide plate 44 is connected to the developing roller pair 30.
Since the guide plate 39 is also tilted downward or held horizontally, the fallen pod 15 slides on the guide plate 44 and the developing roller pair 30 and the guide plates 40 and 41 The tip of the pod 15 hits the nip of the pair of developing rollers 30 on the stopped positive sheet piece and stops (arrow G).Then, the negative sheet piece that has been exposed is moved by the roller 26 to the guide plate 4.
i
After passing through a, the tip hits the nip.

The feeding Q, cutting, and exposure of the negative film are controlled to be prohibited when the sensor 47 shown in FIG. 1 does not detect a piece of positive sheet, or when the sensor 80 does not detect the passage of the pod 15. .

For example, it is possible to prevent malfunctions such as forgetting to insert a positive sheet piece or failure to feed the pod 15 by disabling the print SW from being pressed. Similarly, by controlling the supply of the pod 15 to be prohibited when the sensor 37 does not detect a positive sheet piece, wasteful consumption of the pod 15 and the negative sheet piece due to poor conveyance of the positive sheet piece can be prevented. can.

After the negative sheet piece, the positive sheet piece, and the pod 15 are brought into contact with the knob and their tips are aligned, the developing roller pair 30
rotates, and the champion is conveyed together.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). After the developer has been spread over the image area, just before the trailing edges of the negative and positive sheets pass the nip between the pair of developing rollers 30, the cam 45 shown in FIG. Push up upwards with 48 in the center. The developing roller 3 is attached to the arm 46.
0a is rotatably engaged and pushed upward together with the arm 46, and at this time the pair of developing rollers 30' are separated. Thereafter, the rotation of the developing roller pair 30 is stopped.

The timing of the above separation is determined by the sensor 47 or the sensor 4.
2 is determined by counting the time t after detecting the rear end of the positive sheet piece or negative sheet piece.

As a result of the above, the distance between negative and positive sheets has increased, and in Figure 3, D
, surplus developer can be stored in the D' section. Developed negative sheet 11. The positive sheet 14 is held in close contact with the developer while being bitten by a developing roller pair 30 whose rear end is spaced apart, and is then ejected out of the machine by the operator. After several tens of seconds, the positive color image is transferred to the positive sheet 14 when the positive sheet 1-14 is peeled off.

〔effect〕

The present invention is as described above, and according to the instant photographic apparatus according to the present invention, the misalignment between the latent image forming surface (negative sheet surface) and the image receiving surface (positive sheet surface) during development can be reduced by one time of the negative film. It is possible to always suppress the cutting error to about .

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an instant photographic device according to an embodiment of the present invention, Fig. 2 is a perspective view showing a negative film in a developed state, Fig. 3 is a perspective view showing a positive sheet piece, and Fig. 4 is a perspective view showing a negative sheet. FIG. 5, which is a diagram for explaining the positional relationship between the pieces, the pods, and the positive sheet pieces, shows the front face of the pair of developing rollers. 11... Negative sheet, 12... Long paper, 14...
Positive sheet, 15...Pod, 20a, 20b...
Cutter, 25...sensor, 30...developing roller pair. Figure 2 Figure 3

Claims (2)

[Claims] (1) Equipped with an exposure device for a rolled negative film constructed by pasting negative sheets on a long sheet of paper at predetermined intervals, and a pod supply device containing a developer, the positive sheet, the pod, and the tip of the exposed negative sheet are aligned; A peel-apart type instant photographic device that transfers an image by spreading a developer using a pair of developing rollers, and is characterized by being equipped with a sensor that detects the leading edge of a negative sheet and a cutter that cuts the negative film based on the detection result. Instant photography device. (2) The instant photographic apparatus according to claim 1, wherein the long paper is a different color from the negative sheet, and the sensor is controlled to determine the difference in reflectance between the two.