JPH03134639A - Film feeder for microfilm reader - Google Patents

Abstract

PURPOSE:To simplify an position adjusting operation for feeding a film by providing a feeding stop detecting means, a picture end detecting means and a feeding correcting means. CONSTITUTION:When a manual velocity setter 114 is turned, a feeding direction/ velocity discriminating means 200 and a feeding control means 202 discriminates the amount of a turning direction and a film 50 is fed. Based on an odometer system, when a distance is inputted by a keyboard 112, the motor 60 and 62 are operated to feed the film until reaching the distance. A CPU executes a feeding stop detecting operation 206 by an encoder 66 and in the case of stop, the coordinates of a picture end E is detected with the output signal of a line sensor 78 by a picture end detecting means 208. A correcting amount DELTAl for returning the rear end E to a reference position G of a screen 14 is calculated by a correcting means 210 and the film is fed only for the DELTAl by the feeding control means 202. When a picture comes to the reference position of the screen 14, the key of the keyboard is pushed down and printing is started.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a film feeding device for a microfilm reader that performs a search by feeding a roll microfilm using a manually operated electric film feeding means.

(Technical Background of the Invention) There is a microfilm reader that searches a roll of microfilm while feeding it using a manually operated film feeding means. There is also a manual method in which the film is fed by a motor, while the user searches for a desired image while looking at the screen. Also known is an odometer system in which the amount of film feed is monitored with an odometer, and the target image is searched for by manually inputting the distance from the leading edge where the target image is located using a keyboard or the like.

In the case of a method in which the film is fed manually or the distance is manually set and the film is fed as described above, a situation may arise in which the image does not fit properly into the screen when the film feeding stops. If left in this state, the image will not only be difficult to view (but also be misaligned from the print paper when printing). For this reason, after the film has stopped, slowly advance the film manually again, and the image will be printed. The problem was that the position had to be adjusted, making the operation troublesome and inefficient.

(Object of the Invention) The present invention has been made in view of the above circumstances, and is a method for automatically aligning the film to the correct position when feeding the film manually, such as in a manual method or an odometer method. It is an object of the present invention to provide a film feeding device for a microfilm reader that can stop the film at a stop, simplify the operation of adjusting the film feeding position, and improve search efficiency (Structure of the Invention). The object of the present invention is to provide a feed stop detection means for detecting a feed stop of the film feed means in a microfilm reader that performs a search by feeding a roll of microfilm on which a large amount of image information has been imprinted by a manually operated electric film feed means. and an image edge detection means for detecting a front edge or a rear edge of image information, and a feed correction means for moving the image edge to a reference position on the screen based on the output of the feed stop detection means. This is achieved by the film feeding device of the microfilm reader.

(Embodiment) Fig. 1 is an overall schematic diagram of an embodiment of the present invention, Fig. 2 is a perspective view of a part thereof, Fig. 3 is a system diagram of its control signals, and Fig. 4 is an operational block diagram of the present invention. Figure 5 is a flowchart of the operation,
FIG. 6 is a diagram showing the process of film position correction.

The microfilm used in this embodiment is a roll microfilm 2 shown in FIG.
b) is imprinted. These blips 6 are used to identify three types of blips, large, medium, and small, by changing their vertical positions and widths, and are used to identify, for example, file numbers, block numbers, and page numbers, respectively. This film 2 is stored in a cartridge 8 (FIGS. 1 to 3) and loaded into the league printer device 10.

The no-dubinter device 10 is configured as shown in FIG. That is, the front of the case 12 (right side in Figure 1)
A transmissive screen 14 is disposed at , on which an enlarged image of the frame 4 of the cartridge 8 is projected. The cartridge 8 is loaded into a loading section 16 located below the screen 14. The leading end of the film 2 wound on the supply reel 18 in the cartridge 8 is pulled out by a loading mechanism, and a light source 22 is located below between the two reels 18 and 20 wound on the take-up reel 20. It is located. The light emitted from this light source 22 passes through a film 2, a projection lens 24, an image rotation prism 26, and a plurality of reflection mirrors 2.
The light is guided to the screen 14 through an optical system consisting of 8, 30, 32, etc. As a result, the image information recorded on one frame 4 of the film 2 is enlarged and projected.

A mirror 34 that can be moved back and forth on the optical axis is provided between the reflecting mirrors 28 and 30, and during printing, image projection light is directed to a printer device 36 located below by this mirror 34.
lead to. Note that this printer device 36 is, for example, of a PPC type, and forms an electrostatic latent image of an image by exposing a photosensitive drum 36a (see FIG. 3), and makes a visible image by adhering toner to this latent image. , which is transferred onto printing paper and fixed. Moreover, this blinking device 36 is
A masking device 38 is provided to block the incidence of projection light, and particularly in the case of a negative film, it blocks the incident light that would create a black border in the image.

The film advance mechanism is shown in FIG.

When the cartridge 8 is loaded into the loading section 16, the microswitch 40 detects this, and the CPU 102 (described later) activates the loading mechanism.

That is, a roller (not shown) is brought into rolling contact with the reel 18 through an opening 8a provided at the bottom of the cartridge 8, and the leading edge of the film 2 is pulled out and wound onto the take-up reel 20 via guide rollers 42, 44. Sensors 46, 48 for detecting the presence or absence of the film 2 are arranged near the guide rollers 42, 44.

An endless belt 50 is pressed against the take-up reel 20 and tightly contacts the film 2 being wound there. This endless belt 50
are guide rollers 52, 54, 56 and drive rollers 58
is wrapped around. The drive roller 58 is driven by the mokuro 0 and causes the belt 50 to run in the direction of arrow A, that is, in the winding direction. As a result, the film 2 is wound onto the reel 20 while being sandwiched between the belt 50 and the reel 20. Note that the rotation shaft of the motor 62 is automatically connected to the supply reel 18 when the cartridge 8 is loaded. The film 2 is rewound by driving the reel 18 in the direction of arrow B by the motor 62. At this time as well, the belt 50 runs together with the film 2.

A tension roller 64 is pressed against the endless belt 50 with a predetermined pressure, and this roller 64 applies appropriate tension to the belt 50. The rotation speed of the tension roller 64 is detected by an encoder 66. This encoder 6
Based on the output pulse signal No. 6, the running amount of the endless belt 50, that is, the running amount of the film 2, is determined by the CPU 102, which will be described later.

The aforementioned grip 6 provided on the film 2 has two sets of light emitting elements 68 (68a, 68b) and light receiving elements 70 (70a, 70b). Here, out of the light emitted from the light emitting element 68, only the light passing through the blip 6 is selected by the slit 72 and guided to the light receiving element 70. The outputs of these light-receiving elements 70 are input to the CPU 102, and by integrating the type of grip 6 and the number of passes, the frame 4 that has passed under the light-receiving element 70 is identified. The distance between the detected blip 6 position and the optical axis C is constant β and 1
Therefore, by monitoring the amount of film travel detected by the encoder 66, the frame 4 being projected can be identified. That is, when the blip 6 of the target frame 4 is detected, the target frame 4 will be placed within the optical axis C by feeding the film 2 further toward the take-up reel 20 by a distance β from there.

The image information of the target frame 4 that has entered the optical axis C in this manner is projected onto the screen 14. Here, the magnification of the projection lens 24 is variable by a motor 74, and the rotation angle of the image rotating prism 26 is variable by the motor 76 (FIG. 3).

This prism 26 is normally set so that the image moves in a direction perpendicular to a line sensor 78 (to be described later), that is, in the left-right direction, with respect to the direction in which the film 2 is fed.

Behind the screen 14, a movable plate 80 holding the CCD line sensor 78 is disposed so as to be movable left and right on guide rails 82,84. As shown in FIG. 2, both ends of a wire 90 wound around a pair of pulleys 86 and 88 are fixed to the movable plate 80. The pulley 88 is rotated by a motor 92, and a wire 90 running therewith moves the movable plate 80 left and right.

Next, the control device 100 will be explained based on FIG. The control device 100 includes a digital processing unit (hereinafter referred to as CPU) 102 and input/output interfaces (I/F) 104 and 106.
, a ROM 108 for storing operating programs, etc., and a RAM 110 for storing image signals read by the line sensor 78, various data, etc. Various signals are input to this CPU 102 via an input I/F. For example, the image signal a read by the line sensor 78, the output signals of the microswitch 40, the sensor 46, 48, the light receiving element 70, the encoder 66, etc. are input. From the keyboard 112, if the target image is input as an identification code, the code is input, and if the target image is input as a distance (odometer method), the distance is input.

Reference numeral 114 is a manual speed setting device for inputting the feeding direction and feeding speed of the film 2.

The operating knob 116 of the speed setting device 114 has a tendency to return to the neutral position, and when it is rotated from the neutral position to either the left or the right, the amount of rotation is input to the CPU 102. C.P.
U102 has the function shown in FIG.
The feeding direction and speed of the film 2 are determined in accordance with the rotating direction and amount of rotation from the neutral position of the film 6.
The motors 60 and 62 are controlled via speed determination means 200) and feed control means 202. In other words, the film 2 is stopped when the operation knob 116 is in the neutral position, and when the operation knob 116 is turned to the left, the motor 6 is
0 to run the film 2 to the left in FIG. 3, and turn it to the right to operate the motor 62 to run the film 2 to the right. The manually operated electric film feeding means of the present invention thus includes the speed setting device 114, the feeding direction/speed determining means 200, the feeding control means 202, the mokro zero.
It consists of 62 etc.

Reference numeral 118 is an odometer that displays the distance traveled from the leading end of the film. That is, the traveling distance of the endless belt 50 traveling together with the film 2 is determined by adding and subtracting the output pulse signal of the encoder 66 by the CPU 102, and the calculation result is sent to the odometer 11.
8. When the distance of the target image is manually entered from the keyboard 112, the distance determining means 204 of the CPU 102 controls the feeding direction and speed until the distance matches the distance determined from the signal from the encoder 66.

120 is a digital printer, which prints the image read by the line sensor 78 as necessary, or prints the image read by the line sensor 78, or
Another league printer device may be connected to the PU 102 to cause this printer 120 to output images sent from the other device.

Next, correction of the film feed position according to this embodiment will be explained.

When the manual speed setting device 114 is rotated left and right to feed the film manually, the direction and amount of rotation are determined as described above (FIG. 4, means 200 and 202).
, the film is advanced by the motor 60.62 (FIG. 5, step 300). Also, by using the odometer system, if a distance is entered on the keyboard 112, the motor 60.62 is operated until the distance is reached and the film is advanced. Sent.

The CPU 102 determines whether or not the film feeding has stopped based on the output of the encoder 66 using the feeding stop detection means 206 shown in FIG.
(FIG. 5, step 302). CPU1
02, if the feed is stopped, the coordinates of the image end are detected by the one image end detector stage 208 using the output signal a of the line sensor 78 (FIG. 5, step 304).

These coordinates are, for example, JP-A-1-225284, JP-A-1
It can be determined by the method disclosed in JP-A-225282 and the like. These methods detect the edge of the image on the line sensor (on the main scanning line) from the appearance of black-and-white inversion, and sequentially rewrite the coordinates of the determined edge while moving the line sensor. The position that has changed to decrease or vice versa is determined to be the corner of the image. In the present invention, it is not necessary to find the four corners of the image, and it is sufficient to find the coordinates of only the front or rear edges. For example, after feeding the film in the D direction in Figure 6,
When the camera stops at the position, the trailing edge E of the image is detected.

When the CPU 102 detects the rear edge E, which is the edge of the image, the CPU 102 calculates a correction amount Δ° C. in the feed correction means 210 to return the rear edge E to a desired position (reference position) G with respect to the range F of the screen 14. 5, step 306), the film is fed by this correction amount Δ°C via this feed control means 202 (steps 308 and 310).

In this way, as shown in FIG. 6(B), after the image has come to the correct position (reference position) on the screen 14, if a key on the keyboard 112 that instructs printing is pressed, the image will be printed by the printer device 36. It is printed (step 312).

In the above embodiment, the trailing edge E of the image (see e in FIG. 6(A)) is detected in the film feeding direction, and the film is fed by Δ° C. in the returning direction. In this way, if you correct the position by returning to the opposite direction to the feeding direction immediately before stopping, screen 1
The image immediately after viewing on the screen can be returned to the screen, making it easy to use.

Note that if the direction immediately before the film stops is the opposite direction, the other end of the image, that is, the front end, may be detected and the front end may be corrected to the correct position.

The present invention may correct the position by feeding the film in the same direction as the film feeding direction immediately before the film stops. Also,
When the distance between the edge of the image and the correct position is less than a certain value, the image may be moved back, and when the distance is greater than a certain value, the image may be corrected so as to be sent further in the same direction.

(Effects of the Invention) As described above, the present invention detects the edge of the image when it detects the stop of film advance, and corrects the film position by moving the film so that the edge of the image comes to the reference position on the screen. This is done automatically. Therefore, the film feeding position can be easily adjusted and the operability is improved.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic diagram of an embodiment of the present invention, FIG. 2 is a perspective view of a part thereof, FIG. 3 is a system diagram of its control signals, FIG. 4 is an operational block diagram of the present invention, and FIG. The diagram is a flowchart of the operation,
FIG. 6 is a diagram showing the process of film position correction. 2... Microfilm, 0... League printer device, 06... Stop determination means, 08... Image edge detection means, 10... Feed correction means.

Claims (1)

[Scope of Claims] A microfilm reader that performs a search by feeding a roll of microfilm on which a large amount of image information has been imprinted using a manually operated electric film feeding means, comprising: a feed that detects a stoppage of feeding of the film feeding means; Based on the output of the stop detection means, the image edge detection means for detecting the front end or the rear end of the image information, and the feed stop detection means,
A film feeding device for a microfilm reader, comprising a feeding correction means for moving the image edge to a reference position on a screen.