JPS5856854B2 - Jidoukensakusakuchiyou Film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film used in an automatic retrieval device for information retrieval films.

An automatic information retrieval film retrieval device searches from a film with information written on multiple frames lined up at regular intervals.
A predetermined frame is automatically sent out within the field of view of the viewing window of the device.

In this type of device, the roll film is fed using two methods, one for winding and one for feeding. Only blip marks were provided for this purpose.

Therefore, in order to automate the film search process, the desired number of frames is set in advance using a setting device, and the number of blip marks on the film being fed is counted using a detector so that the counted value matches the above setting value. When film feeding is stopped and a desired frame is displayed when the film is fed, it is difficult to check whether or not the film frame being fed matches the count value.

Therefore, if counting is performed incorrectly, a different frame will be displayed instead of the designated frame.

The present invention has been made to eliminate the above-mentioned drawbacks, and an object of the present invention is to provide a film for an automatic retrieval device that can easily detect errors in the feeding amount of information frames.

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

In Fig. 1, 1 is a film, 2 is a non-transparent black part provided at the starting end of the film 1, and this black part 2
The part corresponding to the length of ten or several tens of information frames, which will be described later, is completely non-transparent, and such a non-transparent part is used for writing information on roll film. It can be obtained by simply leaving the starting end of the film unexposed during exposure.

3-1 to 3-n are n information frames in which predetermined information is written on the roll film 1, arranged at regular intervals in the direction of travel of the film.

The first information frame 3-1 begins immediately where the black section 2 ends.

4-1.4-2. ...4n is each information frame 3-1゜3-
2. ...A counting blip mark consisting of a rectangular transparent part provided corresponding to each of the 3n, the center of each counting blip mark coincides with the center of the information frame, and the blip mark length corresponds to the pitch of the information frame. 1. It is one hundred chiL.

The value of this L is not particularly limited. 5-1, 5-2,
. . 5m is a parity check mark consisting of a rectangular transparent portion provided every other information frame on the upper side of each information frame 4-1°42.4-n.

In the case shown, parity check mark 5-1
, 5-2 , ... 5-m is the odd-numbered information frame 3-
1, 3-3, . . .

This parity check mark may be provided corresponding to even-numbered information frames.

Reference numeral 6 denotes a dummy mark, in which, for example, the word "end" is written in each frame after the information frame ends, and the number of dummy marks 6 is an arbitrary number, about several tens of frames.

Marks 1 and 8 made of rectangular transparent parts are provided on both upper and lower sides of each dummy mark 6 for each frame.

Immediately after the final information frame 3n, 6.7.
If each of the 8 marks continues, a more accurate judgment can be made.

In addition, between each information frame, counting blip marks 4-1,
Between 4-2,...4n, parity check mark 5-1, 5-2,...5m, dummy mark 6
, the area between marks 7.8 is non-transparent.

The roll film 1 is wound around reels 9 and 10 and stored in a cassette case 11.

Next, an application example of the roll film as described above will be explained using an example of an automatic search device.

Light is projected onto the roll film 1 as described above from the direction of the arrow as shown in FIG. A photosensor 2.13° 14 is provided at a position to receive light, and a photosensor 5 is provided to receive transmitted light from the parity check mark 5.

Distance between centers of each photosensor 2, 13, 14 ■ is 1 at the frame interval.

When the photosensor 4 is at the center position of the blip mark 4, the light receiving center of the photosensor 2 coincides with the end face of the blip mark 4 in the film advancing direction, that is, the direction of arrow F, and the left half of the photosensor 2 receives light, and the right half The light receiving center of the photosensor 13 coincides with the end face of the blip mark 4 in the opposite direction of travel, so that the right half of the photosensor 13 receives light and the left half does not receive light.

The emitter output of the photosensors 12 and 13 mentioned above is
As shown in the figure, the voltage is applied to the pulse generator 20, and
It is connected to the variable resistor 23 via resistors 21 and 22.

Further, the output voltage of the variable resistor 23 is applied to the base of the switching transistor 24.

In addition, the output of the photosensor 15 is checked by the parity check circuit 2.
5.

Now, when the reels 9 and 10 are rotated appropriately to run the film 1 in the direction of arrow F, for example, the photosensors 12 and 13
Blip mark 3-1°3-2. . . passes, the photosensors 12 and 13 are turned on and off alternately, and each information frame 3-1, 3- is output from the pulse generator 20.
2, . . produce a pulse indicating that they have passed through the window 16.

These pulses are counted by the counter 26, and when the reels 9 and 10 reach a predetermined number, the reels 9 and 10 are stopped, and the information frame with the desired number stops facing the window 16 of the cassette case, and the information frame of the automatic search device is displayed in the display window. The desired information is displayed.

During this time, the photosensors 12 and 13 alternately face the blip marks and receive light, and the output voltage from one of the photosensors is applied to the base of the transistor 24, so that the transistor 24 is turned on.

When the reels 9 and 10 are now rewound in the direction of arrow R and the black portion 2 reaches the window 1B, both photosensors 12 and 13
Both no longer receive light, and the output voltage from the photosensor 12.13 is no longer applied to the base of the transistor 24, and the transistor 24 is turned off.

If the reel drive motor (not shown) is stopped by a signal from this transistor 24, the leading end of the film 1 will stop while being wound around the reel 10, and the film 1 will be wound on the reel 10 due to excessive winding. It is possible to prevent obstacles that cause deviations from occurring.

Also, while the film 1 is traveling in the F direction, the photosensor 15
is the parity check mark 5-1゜5-2. . . ., the photosensor 15 generates a signal every other information frame, for example every odd-numbered frame.

By comparing the signal from the photosensor 15 with the odd number output of the counter 26 (for example, the least significant bit output of the counter 26) that counts the pulses from the pulse generator 20, it is determined that the content of the least significant bit of the counter 26 is an even number. At some point, when there is an output from the photosensor 15, the parity check circuit 25 generates an error signal, and it is known that the count value of the counter 25 for the number of information frames being sent is incorrect. reel 9.1
Performs the operation when stopping or rewinding the 0 feed.

Next, the film 1 is fed in the F direction, and when the end of the film reaches the window 16, an "end" mark appears on the display window (not shown) of the automatic search device that displays the image of the window 16, and the Those looking at the window know that the film has reached its end.

As a result, if the reels 9 and 10 are stopped, the film 1
With the terminal end wound around the reel 9, feeding of the film is stopped, and the film 1 is prevented from coming off the reel 9.

Note that when the film 1 reaches the terminal end, the photo sensor 15
receives the transmitted light from the mark 8 for each dummy mark 6, so even when the counter 26 is an odd number, the photosensor 1
5 produces an output.

As a result, error detection is performed in the same manner as a parity check, the parity check circuit 25 produces an output, and the reel is stopped or automatically rewound to prevent overwinding of the film.

As described in detail above, the film for automatic retrieval device according to the present invention forms a required number of information frames on a roll film, and attaches counting blip marks corresponding to each information frame. Since it is equipped with a parity check mark that detects whether the counted value is correct or incorrect in response to multiple information frames corresponding to be able to.

Further, since errors in the feed amount can be detected immediately, the film is not fed unnecessarily.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a sectional view showing the film of the embodiment shown in FIG. 1 housed in a cassette case, and FIG. FIG. 2 is a circuit diagram showing an example of a control circuit of an automatic search device to which film is applied. 1...Film, 2...Black part,
3-1゜3-2...Information frame 5-1, 5-
2...Parity check mark.

Claims (1)

[Claims] 1 Form the required number of information frames on a roll film, attach a counting grip mark corresponding to each information frame, and separately from the blip mark, one of the information frames
A film for an automatic search device, characterized by having marks for parity check attached to every corner.