JPS6028335B2 - Photography equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a photographing device for photographing a subject on a recording medium.

In photographic devices such as rotary cameras and flat-bed cameras that continuously photograph subjects on a long microfilm, arbitrary spaces for exposure are formed between frames on the film, and (a blank space is created between each group to ostensibly distinguish between each group of related frames), in order to avoid exposure to the leading edge area of the film where fog is occurring. , a so-called blank feed is performed in which the film is fed through the exposure section without photographing.

This jump feed is configured such that the film is automatically fed through the exposure position by manually operating the jump feed switch, and the film stops when the jump switch is released. With this type of camera, the operator cannot accurately determine the amount of film that has been fed, leading to problems such as unnecessary film feeding or too little film feeding. This problem can be solved by measuring the amount of film feed and displaying the amount on a display, but this method requires a special measuring device and display, making the device complicated and expensive. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a photographing device capable of measuring and displaying the amount of film feed without adding any special parts.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows a rotary camera, 1 is a supply reel, 2 is a take-up reel, 3 is a microfilm F held in a roll on the supply reel 1, and the film is wound from the supply reel. 4 is a document feed roller, 5 is a document discharge roller, and 6 is a film feed roller that feeds the film to the take-up roll.
7 is an illumination lamp, 7 is an imaging lens that is illuminated by the lamp 6 and projects an image of the original 8 onto a film, and 9 is a slit plate placed at the photographing position. The document 8 is fed by rollers 4 to a photographing position illuminated by a lamp 6, and after passing through the photographing position at a constant speed, is discharged by rollers 5. A film feed roller 3 rotates in synchronization with the document feed, and an image of the document is photographed on a film using a slit exposure method. Manuscript 8
The film feed roller 3 is configured to stop when the film passes the photographing position. FIG. 2 shows the control circuit of the camera, where S is a switch that detects a document sent to the photographing position, and generates a count pulse signal every time one document is sent to the photographing position.

S2 is a switch which operates in response to the rotation of the film feed roller 3, and generates an on/off recount pulse signal each time the film is fed by one skin distance due to the rotation of the roller 3. S3 is a dry feed switch, which is an automatic return type switch, and is manually operated by the operator, turning on when pressed and turning off when released. The switch S2 is turned on and off by a cam provided coaxially with the film feed roller 3, for example. 10 is an AND gate that gates the count pulse signal from the switch S2, 11 is an OR gate, and 12 is an inverter.

15 is a counter that adds and counts the count pulse signal generated from switch S or S2.

Note that the counter 15 counts green after the count pulse signal. F,, F2 are flip-flops, 16 is a differentiation circuit that outputs differential signals at the leading and trailing edges of the set output signal of flip-flop F, and 17 is operated by the differential signal, and the pulse signal of the level is divided by the number of digits of the counter. The output pulse generating circuit 18 is a memory circuit. It is assumed that the flip-flop F is reset by the preceding green of the count pulse signal. 20 is an AND gate that transfers the contents of the counter 15 to the memory circuit 18, and the pulse signal of the pulse generating circuit 17 is used as a control signal to transfer the contents of the counter 15 to the AND gate 201.
When this is sent, the contents of the counter 15 are transferred to and stored in the memory circuit.

Reference numeral 21 denotes an AND gate that transfers the stored contents of the memory circuit 18 to the counter 15. When a pulse signal from the pulse generator 17 is sent to the AND gate 21 as a control signal, the contents of the memory circuit 18 are transferred to the counter 15. That is, when a pulse is generated from the pulse generating circuit 17, the AND gates 19 and 20 are opened, and the contents of the counter 15 are transferred to the memory circuit 18, and the contents of the memory circuit 18 are transferred to the counter 15, respectively. The memory circuit 18 is cleared by the count pulse signal of the document detection switch S. A segment decoder 21 converts the contents of the counter 15 into segments, and a display 22 displays the contents of the counter 15 in seven segments.

Reference numerals 25 and 26 indicate a jump feed setting device for setting the amount of film to be fed, and 27 and 28 indicate the contents of the counter 15 and the setting device 25.
A comparator that compares the contents set in 26 and outputs a match signal of level /. when the two match.

The comparators 27 and 28 are configured to compare the contents of the counter 15 and the setters 25 and 26 only when the flip-flop F is in the set state and the AND gate 30 is open. The setting amount (length of the film to be fed) of each setting device 25, 26 can be manually set to an arbitrary amount using a dial etc., but the setting amount of the first setting device 25 is set to the second setting device 26. is set smaller than the set amount. The setting amount of the second setter 26 is set so that at least the fogged part of the film is set at the exposed part so that when the film is loaded into the camera, the capri part (the part illuminated by external light) at the leading edge of the film will not be photographed. The film is set to be fed for a length of about 150 skins (varies depending on the distance from the exposure section to the winding section), which corresponds to the length the film is fed until it passes through. The setting amount of the first setting device is set to the length at which the unexposed film is fed when the exposed film is separated from the unexposed portion by cutting it with a cutter, and before the next exposure is performed on the film in the photography department. This corresponds to the length of approximately 25 arcs. 31 is an OR gate, 32 is a motor drive circuit, and M is a film drive motor connected to the film feed roller 3.

It is assumed that the OR gate 31 opens when a low level signal is input, the other gates open when a high level signal is input, and the flip-flop F2 is reset when the power switch is turned on. do. In the camera described above, the counter 15 normally counts the number of times the image is taken, and the number of times the image is taken is displayed in five digits on the display 22 (all digits are displayed). That is, each time the document 8 is sent to the photographing position and photographed, the switch S. is activated, and the count pulse signal from switch S passes through OR gate 11 and is counted by counter 15. The contents of the counter 15 are displayed as the number of photographing times on the display 22 via the segment decoder 21. Next, if a blank section is to be formed on the film after photographing one group of originals, the blank feed switch S3 is turned on to feed the film without photographing.

The OR gate 31 is opened by the low level signal from the switch S3, the motor M is driven via the motor drive circuit 32, and the film F is fed by the rotation of the film feed roller 3. By operating the idle feed switch S3, the output of the inverter 12 becomes the level /. The switch S2 is turned on and off every time the film is fed by one layer as the film is fed, and the count pulse signal generated from the switch S2 passes through an AND gate 10 and an OR gate 11 and is counted by a counter 15. Therefore, the counter 15 that counts the number of shots is switched to a state where it counts the amount of blank feed instead of the number of shots. On the other hand, the dry feed switch S
3 is turned on, the flip-flop F is set, its set output signal operates the differentiating circuit 16, and the pulse from the pulse generator 17 opens the AND gates 20 and 21. As a result, the contents of the counter 15 are transferred to the memory circuit 18, and the number of times of photographing so far is stored in the memory circuit.
Note that before the number of photographing is stored in the memory circuit 18, the memory circuit 18 is cleared by a signal from the switch S. As the film is idly fed, the counter 15 counts the count pulse signal of the switch S2, and measures the amount of idling film feeding. The contents of the counter 15 during idle feeding are shown on the display 2.
2 is displayed as the film feed amount (in units of c). Also, since the flip-flop F, is in the set state, the AND gate 30 is opened and the contents of the counter 15 are changed to each comparator 2.
7 and 28 are compared. If the jump switch S3 is turned off before the film is skip-fed by 25 degrees, that is, before the comparator 27 outputs the coincidence signal, the OR gate 31 is closed, the motor M is stopped, and the film is no longer fed.
Therefore, the amount of blank feed can be arbitrarily adjusted up to 25 arcs. now,
After loading the film into the camera, turn on the jump feed switch S3 to feed the film 231 times, that is, to the comparator 27.
When the jump switch S3 is turned off after outputting a match signal, the flip-flop F2 is set by the match signal from the comparator 27, so even if the jump switch S3 is turned off, the OR gate 31 is opened and the jump feed operation continues. Maintain automatically. The film is fed 150 degrees and the comparator 28
When a match signal is output from the flip-flop F2, the flip-flop F2 is reset, the OR gate 31 is closed, and the film is no longer fed. Therefore, even if you operate the jump feed switch S3 after loading the film into the camera and let go of the jump feed switch S3 after the film has been skipped forward by the first set amount, the film will still run until the fogged part passes through the exposure area. Since the camera is fed forward, it is possible to prevent the accident of accidentally photographing a foggy area, and the photographing operation can be carried out easily and without error. When the photographing operation is started after the end of the empty feed, the flip-flop F is reset by turning the switch S on and off, and the pulse generation circuit 17 is activated via the differentiating circuit 16 by the fall of the set output signal of the flip-flop F. . The AND gates 20 and 21 are opened by a pulse from the pulse generating circuit 17, and the number of photographing times stored in the memory circuit 18 is transferred to the counter 15. Therefore, after jump-feeding, in addition to the number of shots of one group of originals taken before the jump-feeding, the counter 15 counts the number of shots of the newly shot one group of originals, and the total number of shots is displayed on the display 22. Ru. After photographing one group of documents, when the blank feed operation is performed again, the blank feed amount is counted by the counter 15 in the same manner as described above.

Next, when the photographing operation is resumed after completing the empty feed, the number of photographing operations is counted by the counter 15 in the same manner as described above. Therefore, by operating the jump feed switch S3, the counter 15 that counts the number of shots can be switched to count the jump feed amount instead of counting the number of shots. In addition, 1 film
It is also possible to generate a count pulse signal when a frame is idly fed to count the amount of idling feed.

As described above, according to the present invention, it is possible to measure and display the amount of film feed without adding any special parts.
The idle feed amount can be adjusted accurately, and the device is simple and inexpensive.

In addition, it is possible to automatically advance the fogged part at the leading edge of the film, so you can make sure that you do not make any mistakes during the shooting process.
It's easy to do.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a rotary camera to which the present invention is applied;
FIG. 2 is a diagram showing a control circuit of the camera. 3... Film feed roller, 4... Original feed roller, 5... Original discharge roller, 15... Counter, S3... Null feed switch. Figure 1 Figure N

Claims (1)

[Claims] 1 In a photographing device that uses a counter to count the signals generated each time an original is photographed on film, and displays the contents of this counter on a display, there is a jump feed switch, and when the jump switch is operated, the film is skip-fed. a film feeding means that switches, a signal generation means that generates a signal every time the film is fed a certain length by the film feeding means, and a signal generation means that clears the counter when the film feed switch is operated to start the shooting. means for inputting a signal generated from the signal generating means into the counter; and means for stopping the jump feed when the operation of the jump feed switch is completed before the film is jumped by the first set amount; A photographing device comprising a feeding control means for feeding the film by a second set amount and then stopping the feeding when the operation of the jumping switch is completed after the film has been fed by a first setting amount or more.