JPH0687145B2 - Film data burning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an unexposed film in a roll film production process for a photographic camera, including a frame number, a brand, an emulsion number, a bar code and other characters and symbols (hereinafter, Data)), and more particularly to a printing device having an improved data burning part.

[Background of the Invention] This type of device slits an unexposed film coated with a photosensitive material to a predetermined width, forms a feed hole (perforation), and then transports the film at a predetermined speed to transfer data. This is a device that performs burning.

However, when printing data with this device, conventionally, while transporting the film with rollers,
Since the printing is performed on the roller, if slippage occurs between the roller and the film, it is not possible to accurately detect the position of the film, which causes a problem that the printing position deviates from the normal position.

For this reason, in particular, when a character image or the like is imprinted with a dot image, there is a problem that a gap or multiple exposure can be performed on the character and the character quality is deteriorated.

[Object of the Invention]

An object of the present invention is to allow data to be burned into a predetermined position with high accuracy during burning.

[Structure of Invention]

To this end, the present invention is an apparatus for optically burning data on an unexposed film being transported, comprising a sprocket for transporting the film, wherein the data burning position is on the sprocket, and A tension was applied in the film transport direction or the opposite direction.

〔Example〕

Examples of the present invention will be described below. First, FIG. 1 is a diagram showing an outline of the whole. Unexposed film 1
Is transported by the guide rollers 2 and 3 at a predetermined speed in the arrow A direction while being wound around the sprocket 4. At this time, the feed hole of the film 1 is locked to the claw 4a of the sprocket 4. The shaft of the sprocket 4 is connected to the torque motor 5. Since the torque motor 5 has the torque characteristics shown in FIG. 2, the motor 5 applies a rotational force to the sprocket 4 in a direction opposite to the film transport direction, so that the sprocket 4 can be stably backed up. Tension is added.
Therefore, since the claw 4a of the sprocket 4 is locked to the edge of the film 1 on the side opposite to the feeding direction in the feeding hole, the film 1 is fixed to the surface of the sprocket 4 (slip zero state) on the downstream side. It is accurately conveyed at the conveying speed due to the tensile force pulled by.

The tension by the torque motor 5 is not limited to the back tension but may be the forward tension. The tension may be applied by a powder brake or the like, but it is preferable to use a motor that applies tension even when the motor is stopped.

Reference numeral 6 is a data input device, which comprises a type setting device 61 (sensitivity, brand, size, etc.), a data output device 62 for characters and symbols, and a data editing device 63. The data edited by this data editing device 63 is , RAM and the like.
The data written here is read out by being addressed by a signal from the access address generator 8 and once latched by the control circuit 9, when the burning timing pulse arrives, the film 1 is burned in the burning portion. Burned into.

This burned part includes a group of LEDs 10 whose lighting is individually controlled to be turned on and off by a control circuit 9 and respective LEs thereof.
It is composed of a light guide member 12 such as a fiber that individually guides the light from D to the lens 11, and the ends of the light guide member 12 are arranged in a line at a pitch of, for example, several millimeters. The direction of this arrangement is a direction orthogonal to the transport direction of the film 1. Then, when the film 1 is located on the sprocket 4, the printing on the film 1 is performed in a dot image in synchronization with the conveyance.

Reference numeral 13 is a rotary encoder which is connected to the shaft of the sprocket 4 and detects its rotation, and the access address generator 8 outputs an address signal in response to a pulse from the encoder 13. The control circuit 9 also receives the output from the encoder 13 and outputs a light emission command pulse (burning timing pulse).

Next, the operation will be described.

(1). About writing data to the memory 7: As shown in FIG. 3, the data writing to the memory 7 is performed according to the length of the film 1 to be printed (12 shots, 24 shots, 36 shots).
It depends on the number of shots. ), Write data for all portions in the length direction (burn data line) of the position to be burned. That is, the positions where the symbols or the like should be actually burned are at predetermined pitches or at several positions, but in the present embodiment, the dot information "1" is stored in the address portion of the memory corresponding to the positions where the symbols or the like should be written. Write
Dot information "0" is written in the other address portion. As a result, the data of the entire portion from the beginning to the end in the longitudinal direction regarding the data-burned portion of the film is written in the memory 7 in order from the youngest address by "1" or "0".

This writing is performed by the data input device 6. If the data input device 6 is configured to be separable, the data input device 6 can be used when a plurality of burning devices are installed.
One can be shared with other burning devices.

Further, at the time of reading, it is sufficient to count the travel detection pulses from the rotary encoder 13 and sequentially access the addresses of the memory 7 from a younger address for each predetermined pitch travel amount. Access address generator 8
Can be configured with simple hardware, and thus the reading speed can be increased.

(2). Regarding Burning: In this embodiment, when burning data, data to be burned later is read from the memory 7 in advance and latched in the control circuit 9 so that a burning command pulse for the data is generated. I try to burn it when it arrives. Fourth
The figure is a timing chart thereof, and the data preparation pulse is a pulse for latching the data read from the memory 7 in the control circuit 9.

At the time of this burning, a predetermined LED in the LED group 10 is selected and emits light, and the emitted light is condensed by the lens 11 via the light guide member 12, and the film 1 on the sprocket 4 is irradiated, The part is exposed. At this time, if all the latched data are bit information "0", even if the burn command pulse arrives, the burn is not actually performed. In this way, the symbols and the like are printed on the film 1 as a dot image. Then, the latent image formed by exposure is simultaneously developed when the user who purchases the film 1 develops it.

As described above, since the data to be burned is prepared in advance, the time required for reading the data from the memory 7 does not affect the time required for burning.
Therefore, even if the transport speed of the film 1 is high, it can be made to follow it, and the burning position can be managed with high accuracy.

The burning operation is performed on the sprocket 4, and as shown in FIG. 5 (a), when the pawls 4a are formed on both sides and the outer sides of both the pawls 4a are simultaneously burned, FIG. ), When the nails 4a are formed on only one side and both sides are simultaneously baked, as shown in FIG. 5 (c), the nails are formed on only one side.
4a is formed, and when baking is performed only on the side where the claw 4a is formed, the claw 4a is formed only on one side as shown in FIG. 5D, and the claw 4a is formed. It may be burned on the non-existent side. In either case, the back tension is applied, and the data is accurately burned into the burning position.

If a plurality of sprockets are used in the film transport system and the film is stretched between adjacent sprockets, the positional accuracy will be high even if baking is performed at that portion.

(3). Compensation for pulsation of film transport: By the way, when the transport speed of the film 1 pulsates, the position to be printed on the sprocket 4 also pulsates, and there is a risk that a part of the symbol or the like printed in the dot image will be duplicated. There is. With respect to this point, in the present embodiment, the output timing of the light emission command pulse in the control circuit 9 is delayed until, for example, when the transport direction of the film 1 is reversed, the output is resumed.

FIG. 6 is a block showing an example thereof. In this example,
Output pulse from the rotary encoder 13 (2-phase pulse)
Is determined by the forward / reverse determination circuit 14, a forward rotation pulse indicating forward rotation (conveyance A direction rotation) is fed to the up terminal U of the up / down counter 15, and a reverse rotation pulse indicative of backward rotation is fed to the down terminal of the counter 15. The output value from the counter 15 is compared with the previous output value of the counter 15 latched by the latch 16 by the comparator circuit 17 and the output value from the counter 15 is larger than the output value of the latch 16. Only in this case, the light emission command pulse is output and the content of the latch 16 is updated to the output value of the counter 15 at that time.

Therefore, the latch 16 always has a large count value (maximum value).
Is latched. Therefore, for example, when the sprocket 4 rotates in the reverse direction, the counter 15 counts down and the count output decreases. Therefore, the light emission command pulse is not output from the comparator 17, and the sprocket 4 returns to the normal rotation. Only when the count value of the counter 15 exceeds the maximum value previously latched by the latch 16, the light emission command pulse is output. That is, the light emission command pulse is the film 1
Will be output only when is correctly advanced in the conveying direction by a predetermined pitch.

FIG. 7 is a diagram showing a block of another example. In this example, the up-down counter 15 is preset with an initial value by the initial value setting unit 18, and when the counter 15 overflows, a light emission command pulse is output, and at the same time, a delay circuit as a preset circuit is output by this pulse. The counter 15 is preset to an initial value via 19.

Therefore, for example, if the counter 15 is selected to overflow at “10” count and the initial value setting device 18 is set to “8”, if the sprocket 4 continues to rotate in the forward direction, the counter 15 becomes 2 A light emission command pulse is output each time the counter is counted up. If you rotate in the opposite direction, the counter
Since 15 counts down, a light emission command pulse is output when the reverse rotation is performed in the forward direction by the amount of reverse rotation and further by the amount corresponding to the count of "2".

Although the carry output of the counter 15 was used here,
Carry output can also be used. In this case, the forward rotation pulse and the reverse rotation pulse of the forward / reverse detection circuit 14 may be input to the terminals U and D of the counter 15 in reverse. In this case, for example, if "1" is set in the counter 15 by the initial value setting device 18, the light emission command pulse is output every time the counter is down counted by 2 counts, just as in the above case.

(4). LED management: At the time of burning, it is not possible to confirm whether the burning has been performed normally, even if each LED of the LED group 10 has a failure due to an open or short circuit. The LED needs to be constantly monitored. Conventionally, the monitoring was based on the current flowing through the LED, but there were various problems.

Therefore, in the present embodiment, as shown in FIG. 8, the voltage between both ends of each LED 10a is detected by the inter-terminal voltage detection circuit.
It is detected individually by 20 and the discriminating circuit 21 discriminates whether or not the voltage is a predetermined value (the forward voltage is 1.8 to 2.0 v when energized). Anomaly detection circuit
22, the abnormality detection circuit 22, in comparison with the lighting control information of the LED, to obtain the extinction information from the determination circuit 21 about the LED that should be energized at present,
Alternatively, when the lighting information of the LED, which should be turned off at present, is obtained, an alarm signal is output. This alarm signal is a signal indicating an abnormality in the selection operation of the LED group 10 by the control circuit 9 in addition to the abnormality in the LED.

〔The invention's effect〕

As described above, in the present invention, the data burning position is on the sprocket, and since the tension is applied to the sprocket, the slip between the film and the sprocket becomes zero, and the accuracy of the burning position is high. Therefore, even when a character or the like is expressed by a dot image, it is possible to prevent the deterioration of the quality.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an outline of the entire printing apparatus, FIG. 2 is a torque characteristic view of a torque motor, FIG. 3 (a) is a view showing data "14" printed on a film, (b) ) Is a diagram schematically showing the content of the data stored in the memory, FIG. 4 is a timing chart of printing, and FIGS. 5 (a) to 5 (d).
Is an explanatory view showing the burn-in position, FIG. 6 is a circuit diagram for preventing double burn-in, FIG. 7 is another similar circuit diagram for preventing double burn-in, and FIG. 8 is an LED. It is a block diagram of the circuit which detects abnormality. 1 ... Unexposed film for which data should be printed, 2,3 ...
… Guide rollers, 4… sprockets, 4a… nails, 5…
... torque motor, 6 ... data input device, 7 ... memory, 8 ... access address generator, 9 ... control circuit,
10 …… LED group, 11 …… Lens, 12 …… Light guide member, 13 ……
Rotary encoder, 14 ... Forward / reverse detection circuit, 15 ... Up-down counter, 16 ... Latch, 17 ... Comparator, 18 ...
… Initial value setter, 19 …… delay circuit, 20 …… terminal voltage detection circuit, 21 …… discrimination circuit, 22 …… abnormality detection circuit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masao Nakamura 1 Sakura Town, Hino City, Tokyo Photo 9 Konishi Photo Industry Co., Ltd. (72) Inventor Ryo Ikeda 1 Sakura Town, Hino City Tokyo Photo 9 Konishi Photo Industry Co., Ltd. (56) References Japanese Patent Publication 4-3540 (JP, B2) Japanese Publication 4-81171 (JP, B2) Actual Japanese Publication 1-6504 (JP, Y2)

Claims (1)

[Claims] 1. An apparatus for optically burning data on an unexposed film being transported, comprising a sprocket for transporting the film, wherein a data burning position is on the sprocket, and the sprocket is used to store the film on the sprocket. A data imprinting device characterized in that tension is applied in the conveying direction or in the opposite direction.