JP2931077B2 - Sheet transport device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying apparatus for conveying a special sheet coated with a photosensitive agent such as a negative film, and more particularly, to a photosensitive agent from both ends of the special sheet. The present invention relates to a sheet conveying device that reduces scattering of sheets.

[Conventional technology]

In a peel-apart type instant photographic apparatus, a negative film coated with a photosensitive agent (emulsion) is used.
Usually, a negative film is formed by applying a photosensitive agent or the like to a wide roll film base through several tens of steps, and finally slitting it to a predetermined width.

For this reason, the photosensitive agent tends to scatter at the end of the negative film after the slit, and when the negative film is transported by the sheet transport device, the photosensitive agent scatters from the edge of the negative film, and the transport rollers, etc. It is necessary to periodically clean the transport rollers and the like because they are soiled.

[Problems to be solved by the invention]

However, according to the conventional sheet conveying apparatus, the conveying force of the conveying roller is reduced due to the adhesion of the photosensitive agent, since no measures are taken to prevent the scattering of the photosensitive agent except for cleaning the conveying roller to remove the scattered photosensitive agent. Or the adhered photosensitive agent adheres to another negative film again, adversely affecting the copied image.

The present invention has been made in view of the above, and has as its object to prevent a photosensitive agent from scattering from a negative film.

[Means for solving the problem]

In order to achieve the above object, the present invention conveys a special sheet coated with a photosensitive agent such as a negative film from a negative film cartridge storing the special sheet to a developing roller for developing a latent image formed on the special sheet. In a sheet conveying device, a series of conveying rollers are provided in a conveying path from a negative film cartridge to a developing roller,
It is characterized in that the series of transport rollers are arranged avoiding both ends of the special sheet.

In the above-described configuration, among the series of transport rollers, cylindrical rollers such as registration rollers are provided with grooves for avoiding contact with both ends of the special sheet at positions corresponding to both ends of the special sheet. It is characterized by having.

In the above-described configuration, among the series of transport rollers, a cylindrical roller such as a registration roller is configured to have a width smaller than a sheet width of the special sheet.

[Action]

The sheet conveying device of the present invention conveys a special sheet while avoiding contact with both ends of the special sheet.

〔Example〕

Hereinafter, the configuration of a positive sheet assembly, the configuration of a negative film and a negative film cartridge, the configuration of an instant photographic device, and the configuration of each transport roller (an essential part of the present invention) will be described using an instant photographic apparatus to which the sheet transport apparatus of the present invention is applied as an example. ), Configuration and operation of the development unit, configuration of the dark box device, schematic block diagram, role and layout of the drive system, role and layout of each sensor, configuration of the operation unit and control circuit, control operation of the control unit, development time notification The control operation of the timer will be described in order.

Configuration of Positive Sheet Assembly In this embodiment, the positive sheet (image receiving sheet) is used as a positive sheet assembly by attaching accessory parts such as a pod in which the developer is sealed and a trap mask for holding the surplus developer after extension. .

1 (a), (b) and (c) show the configuration of a positive sheet assembly 100, and the positive sheet assembly 1
Reference numeral 00 denotes a black reader 102 attached to the front end of the positive sheet 101 on the image receiving surface side, a pod 103 containing the developer 103a and attached on the reader 102, and a positive sheet
A tip mask 10 arranged to improve the image at the end of an image area 101 (area axb in FIG. 1A)
4. It is composed of both side masks 105, a trap mask 106, and a rail member 107 attached on both side masks 105.

Although details will be described later, the developer 103 flowing out of the pod 103
“a” is a configuration that can be uniformly spread on the positive sheet 101 with substantially the same thickness as the thickness of the rail member 107 and both side masks 105.

The developer 103a is enclosed in the pod 103 in an amount larger than that required for image formation so as to sufficiently spread to the rear end of the image area. Excess developer 103a is uniformly spread to the rear end of the image area, and then trap mask 106 (D in FIG. 1A).
) And a later-described negative film 200 (D ′ in FIG. 2A). This prevents the excess developer 103a from protruding into the apparatus and adhering to the developing roller and the transport path and contaminating the developer.

In the reader 102, a positive sheet type identification code is formed by three mark portions M1, M2, and M3. Specifically, the mark portions M1, M2, and M3 may be provided with holes by, for example, punching or the like, forming a positive sheet type identification code according to the combination of the presence or absence of the holes, or printing different in reflectance from the reader 102. Or the like. In this embodiment, the mark portions M1, M2, M3 are formed by punching. As described above, since the pod 103 is attached on the reader 102, as shown in FIG.
If 1, M2 and M3 have holes, these holes are pod 103
Will be covered by Accordingly, the color of the reader 102 is set to black and compared with the color of the pod 103 (usually white) to improve the detection accuracy.

Configuration of Negative Film and Negative Film Cartridge In this embodiment, as shown in FIGS. 2 (a) and 2 (b),
A negative film 200 wound in a roll is used. The negative film 200 is made of a long photosensitive band (for example, 36 sheets can be photographed), is wound in a roll shape on the inner side of the latent image forming surface (photosensitive surface), and is shown in FIG. 2 (d). Thus, it is stored in the negative film cartridge 201.

The negative film cartridge 201 is resin-molded into a cylindrical shape including the roll-shaped negative film 200, and is divided into two planes including an axis in order to facilitate molding and loading of the negative film 200. It is.

As shown in FIGS. 7D and 7E, the divided portions of the divided negative film cartridges (upper container 201a and lower container 201b) have fitting portions 202 and 203 for coupling, respectively.
And a negative guiding portion 204 and a negative feeding portion 205 for feeding out the negative film 200 are formed. Fitting parts 202 and 20
3 is formed so that the fitting part 202 covers the fitting part 203,
This prevents the negative film 200 from being exposed due to disturbance light. Similarly, to prevent disturbance light from the negative feeding section 205,
A light-shielding elastic member (eg, a mylar with a flocking cloth) 206 having one end attached to the upper container 201a and the other end contacting the negative film 200 with its own elastic force is provided inside the negative guide portion 204. It is arranged.

When accommodating the negative film 200 in the negative film cartridge 201, the lower container 201b is installed, and the lower container 201b is placed so that the leading end of the roll-shaped negative film 200 can be positioned several mm outside the negative feeding portion 205. . Thereafter, the upper container 201a is covered, the fitting portions 202 and 203 are fitted, and the upper and lower containers 201a,
Combine 201b.

The coupling of the upper and lower containers 201a, 201b is not limited to the above method,
For example, a screw or a heat seal may be used.
In addition, a negative film cartridge 201 is provided below the lower container 201b.
A foot 207 is provided for securely attaching the device to a fixed position of the apparatus main body.

Marks M4, M5, M6 indicating the type of the negative film 200 and the like are provided on the side surface of the container 201a.

By the way, the front surface of the negative film 200 has photosensitivity, but has a light shielding property against external light (irradiation) from the back surface. Rolled negative film 200 is a bright room (semi-dark room),
In the state shown in FIG.
Therefore, the regions indicated by oblique lines (the leading end and the trailing end of the long film) are exposed to light. Other areas are not exposed if they are closely wound. The exposed area is wasteful because a latent image (image) cannot be formed. The negative film 200 is expensive because it uses a silver salt, and waste of this portion cannot be ignored. Therefore, in this embodiment, as shown in FIG.
At the front and rear ends of the long negative film 200, a front end portion 208 and a rear end portion 209 made of a negative film back light-shielding paper (inexpensive material) having at least the inner circumferential length of the negative film cartridge 201 are attached. . Accordingly, it is possible to prevent the front and rear ends from being exposed to light, and to configure the negative film 200 at low cost.

In addition, as shown in FIG.
A notch 210 is provided to be fitted with a pair of pull-out rollers 312 for pulling out the negative film 200. When the negative film cartridge 201 is mounted on the main body of the apparatus, the pair of pull-out rollers 312
Thus, the negative film 200 is reliably nipped.

FIG. 3 (a) shows the overall configuration of an instant photographic apparatus using a peel-apart type instant photographic film. The instant photographic apparatus irradiates illumination light while scanning a document surface.
Optical system unit 301 that forms an image at a predetermined position (exposure surface)
And transport and expose the negative film 200 to the predetermined position,
Further, the transport unit 302 includes a transport unit 302 that positions and overlaps the positive sheet assembly 100, spreads the developer therebetween, and transfers and forms an image on the positive sheet assembly 100.

The optical system unit 301 includes a contact glass 303 and a first glass.
A first traveling body 304 including a mirror and a light source; a second traveling body 305 including a second mirror and a third mirror;
Third traveling body 307 including a fourth mirror and a fifth mirror
And a sixth mirror 308.

Here, the light source included in the first traveling body 304 is a fluorescent light 373.
(Details will be described later), and a contact glass 303
A document placed downward is irradiated while scanning in parallel with the contact glass 303. At this time, the second traveling body 305 is scanned in the same direction at half the speed of the first traveling body 304, so that the optical path length is kept constant.

Also, by the movement of the lens 306 and the third traveling body 307,
This is a configuration for adjusting the magnification and the conjugate length during zooming.

The original reflected light is reflected by the first, second, and third mirrors as shown in the figure, and further, is slit-exposed at the exposure position A via the lens 306, the fourth, fifth, and sixth mirrors.

The transport unit 302 includes a photosensitive negative roll film (negative film 200) feeding section, a negative film cutter section for cutting the fed negative film 200, and a negative film transport / exposure section for feeding and exposing the negative film 200. , A positive sheet assembly transport section and a developing section.

Hereinafter, the operation of transporting the negative film 200 (not shown) will be described, and the configurations of the negative roll film feeding section, the negative film cutter section, and the negative film transport / exposure section will be described in detail.

The negative film 200 accommodated in the negative film cartridge 201 in a roll shape is conveyed onto the guide plate 314 by passing through the rotary blade 313a and the fixed blade 313b by the draw roller pair 312a, 312b, and the intermediate roller pair 315a , 315b. When the leading end of the transported negative film 200 is detected by the sensor S1 at the exposure position A (or after a predetermined time after the detection), the first traveling body 304 and the second traveling body 305 start scanning, and the negative film 200 After the intermediate roller 200 is nipped by the pair of intermediate rollers 315a and 315b, exposure and latent image formation are performed at the exposure position A on the guide plate 314.

Here, assuming that the transport speed of the negative film 200 at the time of exposure and latent image formation is V _N , the travel speed of the first traveling body 304 is V ₁ , and the copy magnification is m, the transport speed V _N of the negative film 200 is It is controlled by the relationship of V ₁ = V _N × 1 / m.

The exposure position A is a flat surface over the slit area, and is set to be equal to or higher than the nip height of the pull-out roller pairs 312a and 312b and the intermediate roller pairs 315a and 315b. Further, the peripheral speeds of the intermediate roller pair 315a, 315b and the pull-out roller pair 312a, 312b are substantially the same, and a predetermined time after the negative film 200 is detected by the sensor S1 (after being nipped by the intermediate roller pair 315a, 315b, Or, the timing when exposure starts)
Driving of 312a and 312b is stopped, and it becomes free with an appropriate load. As a result, the negative film 200 can be conveyed with a slight tension on the exposure position A and in a state in which the negative film 200 is in close contact with the guide plate 314, and the optical path length and the conveying speed to the surface of the negative film 200 are kept constant. be able to.

Negative film 20 exposed and latent image formed over a certain length
0 is temporarily stopped, and thereafter, the rotary blade 313a rotates while contacting the fixed blade 313b, whereby the rotary blade 313a is cut into a sheet. The timing of stopping the negative film 200 is determined by the sensor S1.
Is determined by counting the time t after detecting the leading end of the negative film 200.

Therefore, the trailing end portion of the cut negative film 200 is not subjected to exposure and latent image formation (in other words, exposure and latent image formation cannot be performed). Specifically, at least the rear end portion of the negative film 200 corresponding to the distance from the exposure position A to the tip of the fixed blade 313b (this distance is defined as G) or more is in an unused state,
That is, it is a part that is unnecessarily consumed. Therefore, the exposure position is set so that the distance G is smaller than the distance D '(see FIG. 2A) from the rear end of the positive sheet assembly 100 to the rear end of the image portion transferred onto the positive sheet 101. By arranging A and the cutter (the rotary blade 313a and the fixed blade 313b), it is possible to reduce consumption of an unnecessary portion (rear end portion) of the negative film 200 that is not used for image formation.

Similarly, the leading end of the cut negative film 200 cannot perform exposure / latent image formation over a distance at least from the exposure position A to the intermediate roller pair 315a, 315b (this distance is H). , Distance H is negative film 200
If the exposure position A and the pair of intermediate rollers 315a and 315b are arranged so as to be smaller than the distance C '(see FIG. 2A) from the leading end of the negative film 200 to the leading end of the image forming unit on the negative film 200, Consumption can be reduced.

Further, after the exposure is completely completed as described above, by cutting the negative film 200, for example, compared to cutting during the exposure, it is possible to avoid a change in the transport speed and the like due to the impact of cutting. , Stable conveyance can be performed.

The cut negative film 200 is a pair of rollers 316a, 316b,
And after turning about 180 ° by the guide member 317,
It is guided by the guide plates 318a and 318b, and is further conveyed by the roller 320 until the leading end thereof abuts on the roller pair 321 (here, a stopped state).

Next, the transport operation of the positive sheet assembly 100 will be described, and the configuration of the positive sheet assembly transport unit will be described in detail. Actually, the transport operation of the positive sheet assembly 100 is performed by the transport, exposure and
This is performed before the cutting operation.

Unlike the negative film 200, the positive sheet assembly 100 has no photosensitivity and can be inserted from outside the apparatus. In the instant photographic apparatus of this embodiment, the positive sheet assembly 100 is manually inserted one by one to the left side in the figure along the guide plate 311 at the lower right of the apparatus main body. This eliminates the need for a paper feed / separation device, paper feed cassette, etc.
The device can be made compact and inexpensive.

When the positive sheet assembly 100 is inserted along the guide plate 311 and both side guides (not shown), and the leading end is detected by the sensor S5, the insertion roller pair 322 rotates. The roller of the pair of insertion rollers 322 is connected to the developer pod 103 attached to the tip of the positive sheet assembly 100.
It is arranged so that only the outer ends of the pod 103 are gripped so as not to crush (see FIG. 1A). The positive sheet assembly 100 is conveyed between the guide plates 323a and 323b by the insertion roller pair 322, and stops. The stop timing is obtained by counting a time t 'from when the sensor S6 detects the leading end of the positive sheet assembly 100.

Further, as shown in the drawing, the transport path of the positive sheet assembly 100 is formed by bending at least one place, and external light does not directly enter the machine from the insertion opening of the positive sheet assembly 100 to expose the negative film 200. To prevent it.

The inserted positive sheet assembly 100 stops at a predetermined position, enters a standby state, and can perform a printing operation.

Here, when a predetermined print switch is pressed, the transport, exposure, and cutting operations of the negative film 200 described above are executed. The negative film 200 abutting the stopped roller pair 321 is moved between the guide plate 313 and the guide plate 318b.
Deflected by a certain amount due to the 320 conveying force. After a predetermined amount of the negative film 200 is bent, the negative film 200 is conveyed between the guide plates 324a and 324b by the rotation of the roller pair 321. The rotation start of the roller pair 321 is obtained by counting the time from when the sensor S3 detects the leading end of the negative film 200.

By bending the negative film 200 in this way,
Skew correction is performed by aligning the leading edge of the negative film 200 with the nip of the roller pair 321. The tip of the negative film 200 conveyed by the rotation of the roller pair 321 is detected by the sensor S4, and is conveyed to the nip of the developing rollers 325a and 325b. At the timing from the detection by the sensor S4, first, the insertion roller pair 322 rotates to abut the developing rollers 325a and 325b in which the positive sheet assembly 100 is stopped, and skew correction is performed in the same manner as the negative film 200. Thereafter, the developing rollers 325a and 325b start rotating.

Next, the positive sheet assembly 100 waiting at a predetermined position is transported first, and then the leading end of the negative film 200 reaches the nip of the developing rollers 325a and 325b by the rotation of the roller pair 321. , 325b. At this time, the positive sheet assembly 100
A shift J occurs at the leading end of the negative film 200, and the shift J is controlled so as to be at least smaller than C in FIG. This makes it possible to shorten the length of the negative film 200 that is cut by the amount of the shift J, compared to a type in which the leading end of the negative film 200 and the leading end of the positive sheet assembly 100 are conveyed in alignment. it can.

Configuration of Each Transport Roller (Main Part of the Present Invention) The configuration of each transport roller that transports the negative film 200 will be described with reference to FIG. 3B.

In the present apparatus, the transport roller for transporting the negative film 200 is, as described above, a pull-out roller pair 312a, 312b.
, A roller pair 320, an intermediate roller 315, a roller pair (registration roller) 321, and a turning roller 316. These rollers are located at both ends of the negative film 200 as shown in FIG. (Indicated by a dashed line in the figure), whereby the negative film 200 can be conveyed without pressing both ends of the negative film 200 with the respective conveying rollers.

The intermediate roller 315a (and 315b) is a cylindrical roller,
Grooves Q are provided at positions corresponding to both ends of the negative film 200. Thus, the negative film 200 can be transported without sandwiching both ends of the negative film 200, so that scattering of the photosensitive agent from both ends can be minimized.

The roller pair (registration roller) 312 is made shorter cylindrical roller than the width L ₀ of the negative film 200, thereby performs a skew correction without contacting the end portions of the negative film 200, the light-sensitive agent from both ends Spattering is kept to a minimum.

Next, FIGS. 4 (a), (b), (c) and FIGS. 5 (a), (b), (c), (d), (e), ( f),
The developing operation will be described with reference to FIG.

The developing roller 325a is rotatably supported by a pressure lever 342 that rotates about a shaft 343 fixed to the developing side plate 341. As a result, the developing roller 325a is rotatably supported by the developing side plate 341.

349 and 350 shown in FIGS. 4 (c) and 5 (c) and (d) indicate that the developer 103a protrudes from both ends of the negative film 200 and the positive sheet assembly 100 when the developer is spread, and the developing rollers 325a, 325b and a regulating member for preventing the transfer path and the like from being stained.
The restricting member 350 is fixed to the developing side plate 341 so as to be rotatable about a pin 352 fixed to the developing side plate 341. The regulating members 349 and 350 both enter the groove 355 provided on the developing rollers 325a and 325b.

5 (a), 5 (b) and 5 (c) show the state of the developing unit when the apparatus main body is in a standby state. When the apparatus main body is in a standby state, it is rotatably supported by a side plate of the apparatus main body. Camshaft 34
The developing roller separating cam 346 fixed to 8 and the regulating member 34
The cam follower 344 and the regulating member 349 rotatably supported by the pressure lever 342 are provided on both of the nine separation cams 347.
Of the developing roller 32.
5a is pressed against the developing roller 325b by a spring 345. The regulating member 349 is held in a pressurized state by a spring 351. The regulating member 349 is shown in FIG.
As shown in FIG. 7, a gap P between the regulating member 350 and the regulating member 350 is maintained during pressurization.

On the other hand, the cam shaft 348 to which the cams 346 and 347 are fixed has a configuration in which the cam shaft 348 can be rotated by / 4 rotation by a spring clutch (not shown). At this time, the positions of the cams 346 and 347 (that is, the standby positions) are detected by a predetermined sensor.
For example, if the cams 346 and 347 are not at the standby position when the power is turned on, the cams 346 and 347 are controlled to be at the standby position.

When the positive sheet assembly 100 is inserted along the guide plate 311 in FIG. 3A and detected by the sensor S5, the cam shaft 348 rotates 1/4 in a counterclockwise direction (the direction of K in the figure), The state shown in FIG. 5D is obtained. In this state, the cam 34
The lever portion 349a is pushed by 7, the regulating member 349 is separated from the regulating member 350, and the gap is widened. As a result, the positive sheet assembly 100 is reliably conveyed to the nip portion between the developing rollers 325a and 325b without stopping by hitting the regulating member 349.

Next, the aforementioned negative film 200 is conveyed, the developing rollers 325a and 325b rotate, and after a certain period of time after the negative film 200 is inserted between the regulating members 349 and 350, the cam shaft 348 further moves counterclockwise. Fig. 5 (e),
As shown in FIG. 5F, the regulating member 349 has a gap P as in FIG. 5C (here, a state in which the protrusion of the developer is regulated). The rotation timing of the camshaft 348 to shift to the overrun restriction state is performed by counting the time after the sensor S4 detects the leading end of the negative film 200.

As described above, the developer 103 by the developing rollers 325A and 325b
When the extension of a is completed, the camshaft 348 rotates another 1/4 turn,
In the state shown in FIG. 5 (g), the cam 346 and the cam follower 344 come into contact with each other, the developing roller 325a is separated from the developing roller 325b, and an extra gap is required between the rollers for storing the developer 103a.

The negative film 200 and the positive sheet assembly 100
The developer 103a is discharged to a dark box device (details will be described later) while the developer 103a is extended by the developing rollers 325a and 325b.

After the developer has been spread, a predetermined timer starts,
The fixing time (approximately 30 to 40 seconds) is counted, the prohibition of opening the cover 327 during the fixing time is indicated, and the negative / positive from the dark box device (dark box device by the tray 326 and the lid 327) after the fixing time has elapsed. An indication that the joined body can be taken out is displayed. Here, when the negative / positive joined body is taken out of the tray 326, the trailing end is detected by the sensor S7, and the camshaft 348 rotates 1/4 in a counterclockwise direction, and FIGS. 5 (a), (b), ( It returns to the standby state shown in c). Further, while the developing rollers 325a and 325b are separated from each other, in other words, the printing operation is prohibited until the rear end is detected by the sensor S7. To prevent.

After the development, the operator can obtain an image by peeling off the positive sheet 101 from the negative / positive joined body. The leader 102, the tip mask 104, both side masks 105, and the positive sheet assembly 100 shown in FIG.
The trap mask 106 is detachably adhered to the positive sheet 101, adheres to the negative film 200 side by the adhesive force of the spread developer 103a, and is easily separated by peeling the positive sheet 101 from the negative / positive joined body. Is done.

As shown in FIG. 1 (a), the width L of the pod 103 on the positive sheet assembly 100 in the width direction is equal to or smaller than the width b of the image area so that the pod 103 is not pressed against rollers or the like during transport to be split. It is getting shorter. For this reason, after the pod 103 is cleaved at the portion F, a certain distance (the distance indicated by E in the figure) is required until the pod 103 extends to the image area width b. Also, as described above, the negative film 200 and the positive sheet assembly 1
The deviation J when adjusting 00 is the positive sheet assembly
The distance C may be shorter than the distance C from the leading end of the pod 103 to the cleavage portion F of the pod 103. Therefore, the negative film 20 shown in FIG.
0 The distance C ′ from the leading end to the leading end of the latent image portion is at least the first
The distance may be longer than the distance E from the cleavage portion of the pod 103 to the tip of the image forming portion in FIG.

Configuration of Dark Box Device Referring to FIGS. 6 (a), (b), (c) and (d),
The dark box device will be described.

As shown in FIG. 3A, the dark box device includes a tray 326,
It comprises a light-shielding lid 327 rotatably and detachably supported on a support shaft 328 provided on the tray 326. The dark box device receives the negative / positive assembly in a space formed by the lid 327 and the tray 326 with the lid 327 and the tray 326 closed. This space is a dark room where disturbance light is blocked. Naturally, here, tray 32
6 is provided with a light shielding lid 327, for example, a positive sheet
If 101 is a transparent material for OHP or a thin paper-like material, the time from the spread of the developer until the latent image on the negative film 200 is fixed is determined by the transmitted light from the back of the positive sheet 101. This is to avoid unnecessary exposure due to the transmitted light, since the image is exposed and a good image cannot be obtained.

As described above, since the lid 327 is rotatably and removably engaged with the support shaft 328 fixed to the tray 326, it is opened in the direction of the arrow as shown in FIG. Negative / positive joints can be easily removed. Further, when cleaning the tray 326, the cover 327 can be removed to facilitate the cleaning of the tray 326.

The tray 326 is rotatably and removably engaged with a shaft (not shown) provided coaxially with the support shaft 328 on the apparatus main body side via a hinge portion 326a. When the cover 329 is opened at the time of replacement of the negative film cartridge 201 or when the negative film cartridge 201 is replaced, the cover 329 can be easily removed so as not to be in the way.

Further, as shown in FIGS. 7A and 7B, the sensor S9 provided on the cover 329 is closed when the lid 327 is closed (the state shown by the solid line in FIG. 9B). A shielding plate 327a is provided at a position where the light is turned on, and thereby,
In this configuration, it is possible to detect that the lid 327 is closed and attached to the tray 326. In other words, when the sensor S9 is in the off state, it indicates a state where the lid 327 is open and a state where it is not attached. Therefore, the prohibition control of the printing operation can be performed based on the detection signal of the sensor S9.

In the present embodiment, a photo interrupter is used as the sensor S9, but a sensor such as a micro SW or a proximity switch may be used.

Further, in the above-described configuration, the detection of opening / closing and presence / absence of the lid 327 by the sensor S9 also serves as detection of the presence / absence of the tray 326, whereby the number of sensors can be reduced, thereby reducing costs and simplifying the configuration. Can be planned. In addition, a sensor for detecting the presence or absence of the tray 326 may be provided on the main body as another configuration.

As shown in FIGS. (A) and (c),
The projection 327b is provided, and the tray 326 is provided with a groove 326b at a position where the projection 327b is fitted, as shown in FIGS. The projection 327b is provided at least from the sensor S7 to the negative / bodied joint (100 and 2 in the figure).
00) When the rear end comes off (that is, when the rear end of the negative / positive joined body turns off the sensor S7), the negative / positive joined body comes into contact with the projection 327b, and the lid 327 is opened without being closed. ,
The lid 327 is arranged so that the opening of the lid 327 can be detected by the sensor S9 described above. That is, as long as the negative / positive joined body is not completely removed from the tray 326, the opening of the lid 327 is detected and the next printing operation is prohibited.
The projection 327b is provided outside the image area width b shown in FIG. 1 (a) so that an image is not found when the projection 327b comes into contact with the negative / positive joined body. Further, as shown in FIG. 6 (c), the position of the projection 327b in the transport direction is downstream of the tip of the negative / positive joined body during the developing process after the developer is spread, and the distance y is the distance y in FIG. It is only necessary that the distance between the rear end of the negative / positive joined body during the developing process and the detection position of the sensor S7 be shorter than the distance x shown in FIG.

Although details will be described later, the control means (a control unit 400 described later) executes a print operation prohibition control based on the detection signals of the sensors S7 and S9.

In this embodiment, the lid 327 can be freely opened and closed to simplify the configuration. For example, as shown in FIG. 6 (e), the lid 327 using the solenoid 330 cannot be opened. It is good. Specifically, the solenoid 330 is energized for a predetermined time during which the image is not affected even when the negative / positive assembly after the developer is spread is exposed to light, and the plunger 3 is energized.
When 01 moves in the direction of the arrow and the lid 327 is to be opened, the plunger 301 and the lid 327 come into contact with each other to prevent the lid 327 from being opened.

Further, as shown in FIG. 6 (f), the cover 327 is automatically opened after a lapse of a predetermined time during which the image is not affected even if the negative / positive assembly after the developer is spread is exposed to light. You may do it. Specifically, when a cam 333 that rotates about the shaft 334 is rotated by a predetermined angle (1/2 rotation) by driving means (not shown), the cam 333 contacts a lever 305 rotatably supported on the shaft 307. Contact and push up the lever 305 upward. As a result, the lever 306 provided integrally with the lever 305 is provided.
Abuts on the lid 327 to open the lid 327 upward.

Alternatively, a configuration in which a firm wheel is provided on the rotation axis of the lid 327 and the lid 327 is opened via a form gear by a motor provided on the protrusion 327b is also conceivable. In this case, since a foam is used, the lid is used. Opening of 327 becomes impossible except for driving the motor.

Schematic Block Diagram Next, with reference to a schematic block diagram shown in FIG. 7, a configuration centering on the control unit 400 will be described.

The control unit 400 includes an operation unit 500 for displaying messages and key input, a switching power supply 600 for supplying power to the apparatus main body, a fluorescent lamp 373 (the light source of the present embodiment), and a stable fluorescent lamp 373. A fluorescent light stabilizer 372 to obtain the output,
Fluorescent lamp heater 374 and sensor for detecting the amount of light of fluorescent lamp 373
S20, a main motor 361 for powering a negative film conveyance, a cutter, each roller, etc., a scanner motor 362 for moving a scanner, a mirror motor 363 for moving a mirror at the time of zooming, and a lens at the time of zooming Lens motor 364 for movement
, Clutches 365 to 370 (details will be described later), a solenoid 371 (details will be described later), and various sensors S1 to S22.
(Excluding the sensor S20).

FIG. 8 shows a layout of a drive system such as a motor, each clutch, and a solenoid.

The negative drawer clutch 365 has a drawer roller pair 312a,
The pulling roller pair 312a, 312b is driven on the axis of 312b.

The negative feed clutch 366 includes an intermediate roller pair 315a, 315b,
The pair of rollers 316a and 316b and the pair of rollers 320 are driven.

The registration clutch 367 is on the axis of the registration roller 321 and drives the registration roller 321.

The positive feed clutch 368 is on the axis of the insertion roller pair 322 and drives the insertion roller pair 322.

The developing roller clutch 369 drives the developing rollers 325a and 325b.

 The cutter clutch 370 drives the rotary blade 313a.

The developing solenoid 371 switches the modes of the developing rollers 325a and 325b.

Role and Layout of Each Sensor With reference to FIG. 9, the role and layout of the sensors S1 to S23 provided in the instant photo apparatus of this embodiment will be described.

The sensor S1 is a negative film leading end detection sensor disposed in front of the cutter on the negative film transport path. The leading end of the negative film 200 is detected and used for the start timing of the scanner. Specifically, it is composed of an infrared reflection type sensor.

The sensor S2 is a sensor for detecting a jam of the negative film 200 that performs the negative film intermediate detection on the negative film transport path. It is used to determine a jam based on the time from the detection of the front end by the sensor S1 to the sensor S2. Specifically, it is composed of an infrared reflection type sensor.

The sensor S3 is a sensor for detecting a jam of the negative film 200 that performs the negative film intermediate detection on the negative film transport path. Used to judge a jam based on the time from sensor S2 to sensor S3. Specifically, it is composed of an infrared reflection type sensor.

The sensor S4 performs detection before the negative film developing roller. After the negative film 200 detects the sensor S4, the developing rollers 325a and 325b are rotated at a predetermined timing. Also,
Detecting the rear end of the negative film 200, the developing rollers 325a and 325
The timing of the pressure release of 5b (that is, the separation of the developing roller 325a) is measured. Further, the determination of the jam is made based on the time from when the registration roller 321 is rotated to when the negative film 200 is detected. Specifically, it is composed of an infrared reflection type sensor.

The sensor S5 detects insertion of the positive sheet assembly 100. Positive sheet assembly 100 with the sensor S5
The positive sheet assembly 100 is detected when the tip of
Are arranged so that the mark portions M1, M2, and M3 are located at the reading position of the positive sheet type identification code detection sensor (sensor S10). Specifically, it is composed of an infrared reflection type sensor.

The sensor S6 detects the front of the developing roller of the positive sheet assembly 100. When the positive sheet assembly 100 is inserted and conveyed to the developing rollers 325a and 325b, a position sensor for abutting the leading end against the developing rollers 325a and 325b to stop. Specifically, it is composed of an infrared reflection type sensor.

The sensor S7 detects whether or not a negative / positive joined body is present on the discharge tray 326. Specifically, it is composed of an infrared reflection type sensor.

The sensor S8 senses the back side of the negative film 200 to detect the presence or absence of the negative film 200. At the same time, the leading end and the trailing end of the negative film 200 (light-shielding papers 208 and 209) are identified. For this reason, an infrared reflective sensor is used, and the output of a phototransistor that receives reflected light is read by an A / D converter and detected based on the difference between the outputs.

The sensor S9 detects the presence or absence of the lid 327. Specifically, it consists of a photo interrupter.

The sensor S10 reads the mark portions M1, M2, M3 (positive sheet type identification code) provided on the positive sheet assembly 100. Specifically, three infrared reflective sensors are provided in accordance with the number of mark portions M1, M2, M3 (sensors S10-1, 10-2, 10
-3) Used.

The sensor S11 is a mark section M4, M5, M6 (negative film type identification code) on the side of the negative film cartridge 210.
To read. More specifically, three infrared reflective sensors (sensors
S11-1, 11-2, 11-3) are used.

The sensor S12 detects the open / closed state of the jam removal right door. It consists of a photo interrupter.

The sensor S13 detects the open / closed state of the left door used for cleaning the developing rollers 325a and 325b and setting the negative film cartridge 201. It consists of a photo interrupter.

The sensors S14-1 and S14-2 detect whether or not the developing rollers 325a and 325b are set. Specifically, it is composed of a micro switch.

The sensor S15 includes a photo interrupter and detects a home position of the scanner.

The sensor S16 includes a photo interrupter, and detects a home position of movement of the zoom lens.

The sensor S17 includes a photo interrupter, and detects a home position of the movement of the zooming mirror.

The sensor S18 includes a photo interrupter and detects a home position of the cutter.

The sensor S19 detects whether or not the developing rollers 325a and 325b are at home positions. The developing rollers 325a and 325b have the following four modes.

(I) Roller pressing, edge controller ON (ii) Roller pressing, edge controller OFF (iii) Roller pressing, edge controller ON (iv) Roller release
And is in a standby state.

The sensor S20 is composed of a photodiode and an operational amplifier. The brightness of the fluorescent lamp 373 is detected by the photodiode, and is converted into a voltage signal by a current / voltage conversion circuit and an amplification circuit.
Input to D converter, incorporate into CPU, and use this value for fluorescent light
Used to control 373 light intensity.

The sensor S21 includes a thermistor and detects the temperature of the fluorescent lamp 373. Since the fluorescent lamp 373 has a temperature characteristic in light quantity and spectral distribution, the operating temperature range is limited. Therefore, it is necessary to heat using heater 374, and this sensor S
The temperature is detected by 21 and used for ON / OFF control of the heater 374.

The sensor S22 includes a thermistor and detects temperature.

The sensor S23 includes a reed switch, and detects the projector when a 35 mm projector is placed on the contact glass 303. The instant photographic device switches to the project mode by this detection.

Operation unit FIG. 10 shows the configuration of the operation unit 500, roughly divided into an input unit for setting the use conditions of the device and the like, and a display unit for displaying the input setting state and the like. A print key 501 for inputting a copy start, a density key 502a for adjusting the image density, an enlargement zoom setting key 503b, an equal-size setting key 503c, and an original specification scaling key for specifying an original size.
504a, 504b, a positive sheet discharge switch 505 for instructing discharge of the positive sheet 101, trouble indication such as occurrence of a jam,
A display panel 506 for displaying set values such as a reduced / enlarged zoom value and a message such as "can be copied";
A development time elapse display LED 507 for displaying the development time elapse of the negative / positive joined body.

Configuration of Control Circuit FIG. 11 shows the configuration of the control circuit of this embodiment.

The CPU 1001 is a type in which a RAM, an 8-bit timer, a 16-bit event counter, an A / D converter, and a serial interface are built in one chip, and is, for example, a μPD7810H manufactured by NEC or equivalent thereto.

The RAM 1002 has a built-in lithium battery and stores data such as a capacity of 2 Kbytes, individual data of the apparatus, and the total number of sheets.

The 8254 (1003) outputs a pulse for driving a fluorescent lamp or a DC servo motor (main motor).

The I / O expander 1004 drives each motor, clutch, solenoid, and the like, and controls an operation unit.

 The other components are only shown in the drawings and the description is omitted.

Control Operation of Control Unit Based on the above configuration, the control operation of the control unit 400 of the instant photo apparatus of the present embodiment will be described in detail.

The control operation of the control unit 400 includes the main flow shown in the flowchart of FIG. 12 (a) and the main flow shown in FIG. 12 (b), (c),
It consists of four interrupt processing routines shown in the flowcharts (d) and (e).

The main flow mainly performs sequence control of the machine and a response to the operator.

First, when the power is turned on, initialization processing such as CPU initial setting, memory initial setting, and peripheral IC initial setting is executed (401). Next, a machine initialization process (402) for the scanner, lens, developing roller, cutter, and the like is performed, and an operation by an operator is waited for in a standby process (403). After that, the copying operation processing (40
4) Or, execute serviceman mode processing (405).

The interrupt processing routine is shown in FIGS.
It consists of four routines of 2.5 mSec interval, motor encoder, fluorescent lamp lighting, and scanner motor shown in (d) and (e). In the 2.5 mSec interval, various I / O checks and settings are performed, and at the same time, time Perform the operation. The other three operate only when the motor and the fluorescent lamp are ON, respectively, and control servo and the like.

Hereinafter, each process of the above-described main flow will be specifically described in order.

FIG. 13 shows a flowchart of a machine initialization process. If there is no developing roller, the power will not work because + 24V goes down. Therefore, the presence or absence of the developing roller is detected using the sensor S14 (406). Turn on the fluorescent light heater 374 (40
7) Then, a mechanism whose state changes, such as a scanner, a lens, and a mirror, is initialized (408). At this time, if the negative film 200 is on the transport path, the cutter initialization is not performed (409, 410). If the positive sheet assembly 100 is on the transport path, it is automatically ejected (411, 412). Thereafter, the developing roller is initialized (413), and when the fluorescent lamp 373 is heated, the process is terminated (414).

FIG. 14 shows a flowchart of the standby process. In the standby process, basically, the state of the machine (jam, opening and closing of the door, presence / absence of loading of a negative film cartridge, etc.) is checked, a print key is received depending on conditions, and work is transferred to a paired copy operation process. First, it is checked whether the negative film 200 is detected by a sensor on the transport path of the negative film 200 (415). If the negative film 200 is detected, it is determined that a jam has occurred, the jam display is turned ON, and an error flag is set. (416). Similarly, the open / close state of the door is checked. If the door is open, the door OPEN display is turned ON and an error flag is set (417, 418). The presence or absence of the developing roller is checked. Set the display of no developing roller and error flag (419, 42
0). Although not described in the flowchart, the check of the presence or absence of the lid 327 of the dark box tray 326, the display of the lidless display, and the setting of the error flag are also performed. Thereafter, in steps 421 to 424, the input by the scaling key and the density key of the operation unit 500 is received, and the corresponding operation is performed. At this time, the process shifts to the serviceman mode process by pressing some determined keys (details are omitted). Next, a 3-bit black-and-white code (negative film type identification mark) indicating the type of the negative film 200 provided on the side of the negative film cartridge 201 is read, and the presence or absence of the negative film cartridge 201 and the type of the negative film 200 are detected. The presence or absence of the negative film cartridge 201 and the type of the negative film 200 are displayed (425). Thereafter, if an error flag is set in the above steps, a message or the like corresponding to the error is displayed, and the error flag is initialized to zero (426, 427).

Subsequently, when the negative film cartridge 201 is present (428), it is determined whether or not the negative film 200 is present and whether or not it is a film portion (429). As described above, the negative film 200 is wound into a roll and housed in the negative film cartridge 201, and light-shielding papers 208 and 20 are provided at the front end and the rear end thereof.
9 is installed. Here, the sensor S8 for checking the presence or absence of the negative film 200 performs the distinction between the film portion and the light-shielding paper portion in addition to the presence or absence of the negative film 200.

Specifically, the sensor S8 includes an infrared LED and a phototransistor that checks reflected light, and the reflected light is
And is recognized as 8-bit (0-255) data. If there is no negative film 200, there is no reflected light, so the data will be almost zero,
When the back surface (black) of the film portion is detected, a small amount of light is reflected, for example, a value of about 100 to 120. on the other hand,
In the case of light-shielding paper, the reflectance is higher than that of the back of the film part, so the value is 200 or more, and the CPU is a negative film 20
It is possible to determine whether the window and the film portion are 0.

If the above determination is for a light-shielding paper, in other words, if it is not a film portion, a discharging operation of the light-shielding paper is performed (430, 431). When the light-shielding paper is discharged, if the light-shielding paper is at the leading end, the next film portion is detected. Therefore, the conveyance is stopped there, cut by a cutter, and then discharged out of the apparatus. Further, when the light-shielding paper is at the rear end, film formation is detected, and the discharge is performed as it is. On the other hand, if it is not a light-shielding paper, the process proceeds to step 432. When the negative film 200 is not present, the negative film 200 absence display (433) is performed, and the positive sheet insertion check and the corresponding operation are performed in step 434 (details will be described later).
Execute If the negative film 200 is present, the negative film no display is turned off and the positive sheet standby flag (flag indicating that the positive sheet is ready) is checked (435, 436). If it is standby, it is checked whether the positive sheet discharge switch is ON (437). If it is OFF, the positive sheet discharge operation is executed (438). If it is not ON, the processing from step 415 onward is performed until the print key is turned ON. Repeat (439). If the print key is turned on, the state of the dark box device (tray 326 and lid 327) is checked (439a). Specifically, the detection signal of the sensor S7 is input, and the presence or absence of the negative / positive joined body in the dark box device is determined.
The detection signal from the sensor S9 is input to determine whether the lid 327 is opened or closed or not. Here, when the state of the dark box device is not OK (when sensor S7 is OFF and sensor S9 is other than ON), L
Turn on the ED507 to notify the tray 326 of an error (439b)
Then, the process returns to step 439. When the state of the dark box device is OK (when sensor S7 is OFF and sensor S9 is ON), LED 507
Is turned off, and the process ends (439c).

The ON of the positive sheet discharge switch is input by pressing the positive sheet discharge switch 505 of the operation unit 500, whereby the operator can insert the positive sheet assembly 100 and even after all copying preparations are completed, The automatic discharge of the positive sheet assembly 100 can be freely performed.

FIG. 15 (a) shows a flowchart of a positive sheet insertion check and its corresponding operation routine (step 434 in FIG. 14). In this routine, the positive insertion detection by the sensor S5 and the reading of the positive sheet type identification code (the mark portions M1, M2, and M3 of the positive sheet assembly 100) by the sensor S10 are performed, and the type of the positive sheet matches the type of the negative film. In this case, the positive sheet assembly 100 is conveyed to a predetermined position in front of the developing roller and stopped, and when they do not match, it is discharged to the outside of the apparatus.

When the positive sheet assembly 100 is inserted from the positive sheet insertion port of the device, the insertion of the positive sheet assembly 100 is detected by the sensor S5. At the moment of this positive insertion detection, as shown in FIG. 15 (b), the mark portions M1, M2, M3 are arranged at the position of the sensor S10.
Based on the detection of the positive insertion by the sensor S5, the positive sheet assembly 100 has reached a predetermined position, in other words, the positive sheet type identification code (mark portion M1, M2, M3)
Can be determined. Therefore, when the positive insertion detection is not ON, 0 is set to the positive insertion detection flag, and the process is terminated (440, 441). When the positive insertion detection is ON, whether or not this detection is the detection of the leading end of the positive sheet assembly 100 is determined by a positive insertion detection flag. In the flowchart of this embodiment, the positive insertion detection
When ON and the positive insertion detection flag is 0, it indicates that the positive sheet assembly 100 has been detected for the first time, in other words, the leading end of the positive sheet assembly 100 has been detected. Therefore, if NO in step 442, it indicates that the positive sheet type identification code has been read, the positive insertion detection flag is set to 1, and the positive sheet type identification code has been read (443).

Here, the positive sheet type identification code is as shown in FIG.
As shown in the figure, the mark portions M1, M2, and M3 are formed by providing a black and white pattern, and the type of the positive sheet is assigned to each of the mark portions M1, M2, and M3 and is coded. However,
In the mark portions M1, M2, M3, codes of all white or all black patterns are not used as invalid codes. Thereby, for example, the positive sheet assembly 100 can be turned over,
When inserted upside down, left and right, in other words, the sensor
If the detection of S10 is all white or all black pattern,
An erroneous insertion of the positive sheet assembly 100 can be detected.

Therefore, when the mark portions M1, M2, and M3 are all white or all black patterns, it is determined that the positive sheet assembly 100 is erroneously inserted, the "print paper" of the operation unit 500 is displayed, and the buzzer sounds. Warning about incorrect insertion (444,44
9) Discharge the positive sheet assembly (450). On the other hand, if the mark portions M1, M2, and M3 are not all white or all black patterns, it is determined whether a negative film cartridge is present (445). Here, if the negative film cartridge 200 is present, it is determined whether the type of the negative film matches the type of the positive sheet (446), and if so, the positive sheet assembly 100 is stopped at a predetermined position in front of the developing roller, and the positive standby flag is set. Is set to 1 and the process ends (447, 448). If the type of the negative film and the type of the positive sheet do not match,
Erroneous insertion is determined, the "print paper" of the operation unit 500 is displayed, and a predetermined buzzer is used to give a warning of erroneous insertion (444, 449). On the other hand, when the negative film cartridge 200 is not loaded, the positive sheet assembly 100 is stopped at a predetermined position in front of the developing roller, the positive standby flag is set to 1, and the process is terminated (447, 448).

FIG. 16 shows a flowchart of the copying operation process. When the print key is pressed, first, it is determined whether or not the mode is the 35 mm project mode (451). If the mode is not the 35 mm project mode, the fluorescent lamp is turned on (452). Turn on the main motor, negative drawer clutch, and negative feed clutch (45
In step 3), the transport of the negative film 200 is started. When the leading edge is detected by the negative film leading edge detection (sensor S1), the scanner is started at timing according to the set magnification and mode (454, 456). If the leading edge of the negative film is not detected, a non-feeding JAM check is performed.
It is determined as M (459), and the process proceeds to a jam processing routine (details are omitted).

JAM check is similarly performed for negative film intermediate detection (1), (2) (sensor S2, sensor S3) (456, 457, 460, 4
61). Negative film 20 until negative film intermediate detection (2)
After 0 is sent, when the length of one sheet of the negative film 200 is extended, the conveyance is stopped, the scanner is returned (rotated in reverse), the cutter is rotated, and the negative film 200 is cut. Restart transport of negative film 200 (45
8-464). After the conveyance is restarted, the registration roller is rotated when the negative film 200 hits the registration roller and the leading end thereof is bent to some extent. In other words, skew correction is performed by starting rotation of the registration roller at a predetermined timing (465). The negative film 200 that has passed through the registration roller is detected by a negative pre-development detection (sensor S4), and after a certain time, the developing roller is rotated to perform development (466, 468). At this time, a JAM check is performed in the time since the registration clutch was turned on.If the detection is not detected by the negative pre-development detection even after a certain period of time, the registration JAM
Is determined (467). In addition, detection before negative development (sensor S
4) Detecting that the rear end of the negative film 200 has passed,
After a lapse of a predetermined time, the developing roller is stopped, and the developing roller is set in a separated state (469, 470). From this point, the development time notification timer is started (471). Although not described in the flowchart, if the data of the negative presence / absence detection (sensor S8) indicates the value of the light-shielding paper during the copying operation, the CPU determines whether the negative film 2 has been fed up to that point.
It is determined whether or not the length of 00 is equal to the length capable of forming an image (corresponding to l in FIG. 2). If the length is short, the copying operation is interrupted, and the negative film 200 and the positive sheet assembly 100 are respectively discharged. On the other hand, if it is long, the copying operation is executed according to the flow chart while pulling out the entire rear end of the negative film 200 from the negative film cartridge 201 without the cutter operation. After the main motor is turned off (472), the time to hold the negative / positive assembly in the dark box tray 326 (40
(Seconds) and display (473).

Control Operation of Development Time Notification Timer Next, an outline of a flowchart relating to the development time notification timer will be described with reference to FIGS. 17 (a) and 17 (b).

First, at the start of a development time notification timer in the copying operation processing (step 471), it is determined whether or not the supply is for OP based on the positive sheet type identification code detected by the sensor S10 (supply detection means) (701). For OHP supplies, OHP supply development time (240 seconds)
Is set to timer 1 (702). On the other hand, if the supply is not an OHP supply, the normal development time (90 seconds) is set in the timer 2 (703).

Subsequently, the display routine shown in FIG. 17 (b) is called every one second, the corresponding timer 1 or 2 is decremented, and the development time elapse display LED 507 according to the elapse of time (FIG. 17 (c)
507a to 507f) are turned on. Here, LED507a is 4
The light is turned on at a point in time that has not elapsed 0 seconds (ie, immediately after the start of the measurement of the development time), indicating that the negative / positive assembly cannot be removed from the dark box tray 326, the LED 507f indicates the end of development, and the LEDs 507b, 507c, 507d. , 507e notify the progress.

In order to determine which of the timer 1 and the timer 2 has the development time set, the display routine first executes a step
In step 704, it is determined whether or not the timer 1 is 0 (that is, if it is not 0, the developing is being performed).
At 7, it is determined whether or not the timer 2 is 0. Here, when both the timer 1 and the timer 2 are 0, it indicates that the development is completed. Therefore, the control unit 400 controls the timer 1 and the timer 2
Until both become 0, the display routine call is repeated every second, and the flowchart of FIG.

Hereinafter, the relationship between the display routine and the development time elapse display LED 507 will be described by taking timer 1 = 240 and timer 2 = 0 as an example.

First, since the timer 1 is 240, it is determined that the development of the OHP supply is under development (704), and the process proceeds to step 705. In step 705, 1 is subtracted from the timer 1. Here, since the value of the timer 1 is 239 (240-1), steps 706 and 70
Since none of the comparison conditions of 8,710,712,714 is satisfied, the process proceeds to step 716, where the LED 507a is turned on. Thus LED507
A state in which only a is lit indicates a state immediately after the start of development (specifically, within 40 seconds from the start of development). Next, the process proceeds to step 717, and the process ends because the timer 2 is 0.

Similarly, the display routine is called every one second, and the LED 507 is turned on as follows according to the value after the subtraction of the timer 1 in step 705.

If it is less than 200, proceed from step 714 to 715
7b lights up.

If it is less than 150, proceed from step 712 to 713, LED 50
7c lights up.

If it is less than 100, proceed from step 710 to 711, and
7d lights up.

If it is less than 50, proceed from step 708 to 709,
e lights up.

When it becomes 0, the process proceeds from step 706 to 707, and the LED 507e is turned on.

The LED 507e is lit to indicate that the development time has ended, and the value of the timer 1 also becomes 0 (that is, the timer 1 = 0,
Since the timer 2 becomes 0), the call of the display routine is also stopped, and the process ends.

If timer 1 = 0 and timer 2 = 90, step 718
To 728, as well as LEDs 507a, 507b, 507c, 507d, 50
7e is sequentially lit at predetermined times to indicate the start of development, the elapse of the development time, and the end of development.

Although the description with the flowchart is omitted, the control unit
400 sounds a buzzer at the same time as the display of the LED 507e to notify the end of the development time.

〔The invention's effect〕

As described above, the sheet conveying apparatus according to the present invention can be used to develop a special sheet coated with a photosensitive agent such as a negative film from a negative film cartridge storing the special sheet into a latent image formed on the special sheet. In a sheet conveying apparatus that conveys a sheet to a roller, a series of conveying rollers is provided in a conveying path from a negative film cartridge to a developing roller. Further, since the series of transport rollers are arranged avoiding both ends of the special sheet, scattering of the photosensitive agent from the negative film can be prevented. Further, as a secondary effect, the scattering of the photosensitive agent can be prevented, so that a decrease in the transporting force of the transporting roller can be avoided, and cleaning of the transporting roller and the like can be eliminated. The image quality can be prevented from deteriorating due to adhesion.

Further, in the above-described configuration, since the cylindrical roller such as the registration roller is provided with grooves for avoiding contact with both ends of the special sheet at positions corresponding to both ends of the special sheet, the photosensitive agent from the negative film can be removed. Scattering can be prevented.

Further, in the above-described configuration, since the cylindrical roller such as the registration roller has a width shorter than the width of the special sheet, it is possible to prevent the photosensitive agent from scattering from the negative film.

[Brief description of the drawings]

1 (a), 1 (b), and 1 (c) are explanatory views showing the structure of a positive sheet assembly used in an embodiment of the present invention, and FIGS. 2 (a), 2 (b) and 2 (c) show the present invention. FIG. 2 (d) is an explanatory view showing the structure of a negative film used in the embodiment of FIG.
(E) is an explanatory view showing the configuration of the negative film cartridge of the embodiment, FIG. 3 (a) is an explanatory view showing the entire configuration of the instant photographic apparatus, and FIG. 3 (b) is an explanatory view showing the configuration of each transport roller. Figures, 4 (a), (b), (c), and
5 (a), (b), (c), (d), (e),
(F), (g) is an explanatory view showing the configuration and operation of the developing unit,
FIGS. 6 (a), (b), (c) and (d) are explanatory views showing the configuration of a dark box device of the instant photographic device of the present invention.
7 (e) and 7 (f) are explanatory views showing another embodiment of the method of opening and closing the lid of the dark box device, FIG. 7 is a schematic block diagram of the instant photographic device of this embodiment, FIG. Explanatory diagram showing the layout of a drive system such as a clutch and a solenoid,
FIG. 9 is an explanatory diagram showing the role and layout of the sensors arranged in the instant photo apparatus of the present embodiment, FIG. 10 is an explanatory diagram showing the configuration of the operation unit, and FIG. 11 is the configuration of the control circuit of the present embodiment. 12 (a) is a flowchart of a main flow, FIGS. 12 (b), (c), (d) and (e) are flowcharts of an interrupt processing routine, and FIG. 13 is a flowchart of a machine initialization process. 14 is a flowchart of a standby process, FIG. 15A is a flowchart of a positive sheet insertion check and a corresponding operation routine, FIG.
FIGS. 15 (b) and 15 (c) are explanatory diagrams showing the detection and configuration of the positive sheet type identification code (mark portions M1, M2, M3), FIG. 16 is a flowchart of the copying operation process, and FIGS. b)
FIG. 17 is a flowchart relating to a development time notification timer, and FIG. 17 (c) is an explanatory diagram showing a display state of a development time elapsed display LED. EXPLANATION OF SYMBOLS 100: Positive sheet assembly 101: Positive sheet, 200: Negative film 312a, 312b: Pull-out roller 320: Roller pair 315: Intermediate roller 321: Roller (registration roller) 316: Roller (turn) Roller) 400 Control unit, 500 Operation unit

Continued on the front page (72) Inventor Takashi Seto 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (72) Inventor Kazuhisa Takahashi 3-1 Shimei-do, Nakaname Ichimoji, Shibata-cho, Shibata-gun, Miyagi Prefecture Tohoku Ricoh Co., Ltd. (72) Inventor Fumihiko Hoshi, Shibata-machi, Shibata-gun, Miyagi 3-1 Nakamiku Ichimido, Tohoku Ricoh Co., Ltd. (56) References JP-A-49-48319 (JP, A) JP-A-43915 (JP, A) JP-A-54-164133 (JP, A) JP-B-39-26444 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) G03B 17/52

Claims (3)

(57) [Claims] 1. A sheet transport apparatus for transporting a special sheet coated with a photosensitive agent such as a negative film from a negative film cartridge storing the special sheet to a developing roller for developing a latent image formed on the special sheet. A sheet conveying device, wherein a series of conveying rollers are provided in a conveying path from a negative film cartridge to a developing roller, and the series of conveying rollers are arranged avoiding both ends of the special sheet. 2. The method according to claim 1, wherein a cylindrical roller such as a registration roller of the series of transport rollers is located at a position corresponding to both ends of the special sheet.
A sheet conveying device having a groove for avoiding contact with both ends of the special sheet. 3. The sheet conveying apparatus according to claim 1, wherein a cylindrical roller such as a registration roller of the series of conveying rollers has a width shorter than a sheet width of the special sheet. .