JPS6029732A - Roll film search device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a retrieval device for a roll film league, and more particularly to a device for controlling film braking from high speed retrieval to film stop.

In the above-mentioned high-speed search, the present invention creates a difference in angular velocity and inertial frame between the supply side and the take-up side by forming a certain amount or more of slack in the film when detecting a desired frame and suddenly stopping the film. The purpose of the present invention is to prevent the possibility that a desired frame is not retrieved due to vibration in the film feeding direction caused by play between the supply cartridge reel and the shaft, which causes erroneous counting.

Also, if the film is stopped with slack as described above, the slack will cause the film to vibrate, making the stopping position of the film unstable and easily causing errors. The purpose is to prevent vibrations, stabilize the film stop, and prevent counting errors.

Moreover, the purpose is to prevent inconvenience during other film operations by activating the friction guide member for stabilizing the stop of the film only when the film is braked and decelerated.

First, an example of a microfilm league to which the present invention is applied will be explained with reference to FIG.

■ is a supply reel with film wound into a roll (not shown)
2 is a feed roller that feeds out the leading edge of the film F in the cartridge L; 3 is a roller 2
4 is the feed-out motor that drives the feed-out port ~2
5 and 6 are film kite rollers, 7 is a take-up reel, and 8 is connected to the rotating shaft 9 of the supply reel, and the film 1. a reverse motor for rewinding the film F into the cartridge L; 10 a forward motor connected to the rotating shaft 11 of the take-up reel 7 and winding the film F onto the take-up reel 7;
Reference numeral 12 indicates a first brake for the supply reel shaft 9, and reference numeral 13 indicates a second brake for the take-up reel 11. As these brakes 12Φ13, various known brakes can be used.

The microfilm F in the cartridge 1 is pulled out from the cartridge 1 by the delivery roller 2 by the drive of the delivery motor 3, and sent out toward the take-up reel 7. The fed film is automatically transferred to the take-up reel 7, which is being rotated by the IIIQ feed motor 0, and the winding diameter and
1, the solenoid 4 becomes inactive, the roller 2 separates from the film, and the feed motor 3 stops.

Thereafter, the film F is fed from the cartridge cylinder I to the take-up reel 7 by the drive of the motor O (hereinafter, this is referred to as sequential feeding).

14 is a lamp that illuminates the film; 15 is a condensing lens; 16 is a projection lens that enlarges and projects the image of the film illuminated by the lamp 14 onto a screen (not shown);
is a counting mark provided on the side edge of each frame a of film F,
A mark detector 17 optically detects the mark m on the film illuminated by the lamp 14 and converts it into an electric signal.

In the above configuration, in order to search for a desired film J/frame, the film is fed at high speed in the forward or reverse direction, the marks on the film frames are counted by the optical detector 17,
When the counted value corresponds to the desired frame, the brakes are applied to the driving side reel shaft and the driven side reel shaft at the same time to stop the film, and the frames that have advanced too far are moved back at a slow speed and stopped at the projection position. There are ways to do this.

However, in the above-mentioned high-speed search, the rotation speed N of the shaft on the drive side, which winds a film with a total number of 3000 frames at high speed as shown in Figure 2, is almost constant from O frames to 3000 frames. The rotation speed N of the driven shaft that feeds
2 is a reel, and the rotational speed of the drive side shaft changes above and below N1 after about 1500 frames (the midpoint of the film) due to a change in the winding diameter. Also, the sag of the film when it suddenly stops from 1st speed is represented by the curve δ.In other words, the film stops under tension from the O frame to the approximately midpoint of the 1500 frame, and from the 1500 frame onwards, the film sag becomes noticeable. In the case of films with different numbers of frames, the number of frames near where sag occurs will change.

This phenomenon occurs when the brakes 12 and 13 are applied due to the difference in angular velocity and inertia between the driving and driven shafts. If the slack 1it-δ is smaller than the length due to the ah hole of the driven film cartridge reel, the play of hl+, and the roll j￥, the film will vibrate due to the play, and if the mark m vibrates on the detector 17, it will cause erroneous counting. However, there is a huge problem that certain pieces are not searched.

Therefore, an attempt has been made to separately control the film search when the take-up reel (ill) is the drive side and the control when the supply reel is the drive side. The mechanical inertial system on the reel side, the elastic system on the 1st take-up reel side, and the play between the shaft and the supply/take-up reel cannot be made the same, and the difference will be large with different cartridge formats, so the film will stop. control is complex and difficult.

The present invention aims to solve the above problems in 1-1, and embodiments shown in the attached drawings will be described below.

First, to explain the brake; υj control, Figures 3 to 6 show that when the mark of a desired piece is detected, the brakes are applied to the drive shaft and the driven shaft simultaneously, and during this braking, the brake on the driven shaft is temporarily applied for a certain period of time. This is a structure that allows the film to sag when released.

In the block diagram of FIG. 3, the symbol 1 which is manually input to a processing unit (CPU) 20 such as a microcomputer is a mark signal t) from a mark detector 17 and a signal from a human-powered device 21. From the human input device 21, the frame number of the desired image to be searched, the correct frame number in case of an erroneous search, etc. are input manually.

8.IO is the above-mentioned reverse feed motor and jl1 feed motor controlled by the CPU 20, 22 is the forward feed signal 9411 sent from the CPU, and 23 is the reverse feed signal iJ.
, 24 is Brake IrX, 25 is Brake 12/13
This is a control circuit that controls the

The sixth il is a brake 11] control circuit 25, where A is an i gate, R is an or game 1, ■ is an inverter, T is a timer, and P is a flip-flop.
It works as described.

When the desired piece number to be searched is manually inputted to the human-powered device 21, C
PU is compared with the previous test piece number that is memorized.
It is determined whether it is forward or reverse feed and the backward feed motor 10 or reverse feed motor 8 is rotated by (0).If it is a forward feed search, the motor IO will be on the driving side and the remoter 8 will be on the driven side. .

The film is fed at high speed, and the detection 'J417 detects the mark m, and the CPU counts the signal. When the number matches the input desired frame number f1, the CPU sends a flip-flop to the brake control circuit 25. The brake signal -J-24 is sent to the terminal S of the flop P as rlj.

Furi, Ppromp P output Q rlJ or Ant gate A
, l are sent. Since the 11"1 sending signal 22 rlJ is applied to the antenna I/81, the output (+-3"i comes out from the OR gate R1 and the drive side motor 10
The second player 13 circuit for the shaft 11 of the second player 13 is controlled to apply the brake 13 thereof.

The output rlJ of the flip-flop P is connected to the AND gate A3 and the timer T, and the timer T1 starts operating, and its output becomes the input to the ant gate and is sent to the next ant gate A. ). While the timer T1 is operating, the human power of the timer T2 becomes "0" by the inputter I, so the timer T2 does not operate. It becomes an input and sends a signal from A5 to one input of the next A6.

The other human power of that anime game 1/A6 is sent 4'
Since f23 is included, the circuit of the first brake 12 for the shaft 9 of the driven motor 8 is controlled through the OR gate R2, and the brake 12 is controlled by the same 11 as the above 13! Put it on j.

When timer T, turns off after set time T1, inverter I
Timer T2 starts operating due to I and outputs "1". The "0" inverted by the inputter I2 is the ant gate A.
5, the output of the independent circuit A5 becomes "0" for the set time T2 of the timer T2, so the driven brake 12 is disconnected. When timer T2 turns off, rlJ is input to anchor A5 and the driven brake 1 is activated again.
2 works.

That is, the operations shown in time chart 1 in FIG. 4 and flowchart 1 in FIG. 5 are executed.

In the case of a backward search, rlJ is input as a backward search 23 from the CPU to A2 and A7 of the game-1. When "1" is sent from the terminal Q by the brake +r3 "j 2 4, the ant game is activated as described above) A
Since the output of s is manually applied to the controller 1 and A2, the brake 13 is turned on as a driven side for the time T1 of the timer T1, and is turned off for the time T2 of the timer T, 11ν, and operates again. Since the output Q r I J of the flip flop P and the reverse feed signal 23 constitute the input of the An1 ζ game 1 A7, the output of the An 1 ζ game 1 AI becomes rlJ, and the brake 12 becomes the drive side and continues operation. do.

Resent to terminal R of flip-flop P, No. 1 30
The brakes will operate until you input The reset signal may be sent in conjunction with the start of the next search operation.

As mentioned above, when searching microfilm at high speed and suddenly stopping it, the brakes are applied on both the driving side and the driven side at the same time. After the time has elapsed, the brake on the driven side is turned off for T2R and then activated to create a predetermined slack when the film is stopped. The amount of slack may be controlled so as to be larger than the vibration amplitude due to backlash of the supply cartridge reel.

As mentioned above, in making the lower limit of the slack larger than the maximum amplitude of the vibration caused by the mechanical backlash that occurs when the film is stopped, the slack is
It is adjusted by ΦT. Therefore, even when using a cartridge reel with a different mechanical backlash or a different type of cartridge reel, high-speed searching can be performed by making adjustments to suit each reel. In the unidirectional feed search and the reverse feed search, the inertial frames on the supply side and the winding side may be different, so in that case, the control time T1 and T, described above, may be changed as necessary. Yes - With the above configuration, even if the brake is controlled to create a slack greater than the length pulled by the backlash of the driven reel, the stopping position will be unstable due to vibration of the film due to the slack. In order to eliminate the possibility of causing a miscount in the mark detector 17, the present invention provides friction guide members 39 and 3 that come into contact with both side edges of the film F.
9a, 40, 40a are sunk on the left and right sides of the mark detector 17.

In order to ensure the above contact, the distance between the opposing pair of friction members 39@39a, 40, 40a is made slightly narrower than the width of the film F. Its shape is plate-like as shown in Figure 1,
The cylindrical shape shown in Fig. 1 is made of a low material with high abrasion resistance, such as mink with a stainless steel body.

If a is formed as described above, even if there is vibration due to slack as described in rYjj, the friction guide members 39, 39a and 40, 40
By means of a, the mark detector 17 is stopped at a stable position without being affected by vibrations, thereby preventing miscarriages caused by the mark detector 17. Also, since the frictional guide member acts on the side edges of the film, it does not damage the image.

Even if the stop 1 position of the film is stabilized as described above, there may be a problem with the attitude of the film relative to the mark detector 17.

That is, as shown in FIG. 12, since the width of the film is narrower than the distance d between the friction members, the film stops in any of the positions Fa, Fb, and FC. For this reason, if the mark detector 17 is of an optical type, it may cause an error in the relative position of the mark m on the film, and the gain of the sensor may change greatly, making it impossible to count marks.

In order to eliminate this possibility, as shown in FIG.
1, the orientation of the film becomes either Fd-Fe.

Therefore, the gain change of the sensor is also 1=small, and the possibility that mark detection becomes impossible is eliminated. In addition, for 41, the V shape shown in the drawing is 0 work.

With the above configuration, vibration on the detector can be prevented when the film is stopped 1.1tIf. However, since the winding diameter of the roll film changes by about φ40 to φ80, the torque on the driving side changes by about 1. Therefore, the friction guide member becomes a load when feeding the film, and the variation in length during low-speed running varies greatly depending on the film roll diameter, which may lengthen the search time.

Further, since the distance d between the friction guide members is narrower than the film width as described above, automatic loading of the film I is difficult in the case of a cartridge nozzle that does not use a dedicated league tape. Or Phil J stops and then goes to O-
When rewinding the runned frame, an inconvenience occurs, such as putting a load on film feeding.

Therefore, the present invention provides yl friction guide members 39, 39a, 40,
At least one of the rows of 40a is 39@ in the illustrated example.
40 are supported by support rods 42-43, respectively, and are normally pulled by tension springs 44, 45 to the opposing members 39a, 40a.
Numerals 46 and 47 are magnets which are energized to advance the support rods 42 and 43 rj7 against the spring, thereby keeping the friction guide members 39 and 40 in the operating position.

As shown in FIG. 6, the solenoids 46 and 4 are connected to each signal circuit of the brake 12Φ13 via a Nant gate n4.
By connecting 7, the drive side brake 12 (also 1
During the operation of step 3), the friction guide members 39@39a, 40, 40a are caused to act on the side edges of the film by communicating with both the lenses 46-47.

As a result, the friction guide member acts only when braking, decelerating, and feeding the film, which eliminates the above-mentioned inconveniences during high-speed retrieval running IIν, autoloading of film, and return during auto-run. It is.

7 to 10 show other embodiments of the brake 'lj control device. When the desired piece is detected, the seventh
In the figure, the brake is input from the CPU 20, Q-, > 2
4 to apply the brakes to the drive shaft and driven shaft simultaneously. Then, during braking, when the rotational speed of the drive shaft reaches the set value °, the brake on the driven shaft is temporarily released for a time T2, and then the brake is applied again to reduce the film slack δ to the maximum value described above. The brake is controlled so that the amplitude does not become smaller than the amplitude. In FIGS. 7 to 10, functional parts that are the same as those in FIGS. 3 to 6 are indicated by the same reference numerals.

In order to receive the signal of the above-mentioned set rotation speed, a perforated or tooth-shaped disc 33as 34 is installed on each shaft of the motor 8 and 1O.
A, photo sensors 33 and 34 consisting of a light emitting element, a light receiving element/-33b-34b are provided to extract a pulse signal and input it to the computer 20.

In the same order as in the previous example, the brake signal 24 is sent as rlJ from the CPU to the terminal S of the flip-flop P of the 101Δth brake control circuit 25.

Output Q of flip-flop P (rlJ or AntK)
Sent to Ar. Since the forward feed signal 22 rlJ is applied to the first game A, a signal is output from the OR gate R, which controls the circuit of the second brake 13 for the shaft 11 of the drive side motor 10, and controls the brake 1.
Multiply by 3.

The output rlJ of the above flip-flop P is the OR gate RA
is input to one side of the AND gate A. Since the set rotational speed signal 31 is "0", the timer T does not operate.It is inverted by the inverter ■, and "l" is the ant gate A! , becomes a human power and sends a signal to the next AND gate A6, and A and others use the forward feed signal 22 to move the or game 1-
Send No. 14 to R2. Therefore, the brake 12 on the driven side operates simultaneously with the brake 13 on the right side.

When the rotation of the drive side motor 1o is decelerated and the number of pulses from the photosensor 33 matches the number preset in the CPU 20, the signal 31 is sent to the r+il IJu Isf path 25.
is sent to timer T, and timer T starts operating. Its output rlJ
is reversed to rQJ at in/heta I, and A
, rOJ, the driven brake 12 is turned off.

When the set time T2 of the timer T expires, the brake 11) and the driven brake 12 are activated. The brakes 12, 13 continue until the reset Lu 30 is manually applied.

That is, the operations shown in the time chart 1 in FIG. 8 and the flowchart in FIG. 9 are performed.

In the case of reverse feed search -, reverse feed No. 4a 23 and brake signal t524 are input to the ant gate A7, and the brake 12 of the motor 8 on the driving side is continued through the OR gate R2 until reset No. 4i 30 is input. make it work. The reset signal may be sent in conjunction with the start of the next search operation.

On the other hand, the brake 13 of the motor 10, which is on the driven side, receives signals 23→A2, signals 24→R6,→A5. T→■→A5→
A2 inputs the output rl of the AND gate A to the OR gate Rr, and starts operation at the same time as the brake 12.

The rotation speed of the drive side motor 8 reaches the set f〆I, and the timer T operates with the signal 31, and the driven side brake 13 is -11- cut off with the signal ``0'' to the anti-game I, A, and A2, and the set time elapses. It operates again after T2.

As described above, brake control is performed when the film is stopped.Physical conditions such as inertia of supply side i-take-up side 7, shape of cartridge reel 11. Considering the following, the number of revolutions of the drive motor until the driven side brake is made to be one-sided, and the IL time T of the one-sided.

By experimentally setting , the film slack δ occurring on the driven side is adjusted.

In the brake control device of this embodiment, by activating the friction guide member only when the brake is activated,
It has the same effect as the embodiment shown in FIGS. 3 to 6.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts of a microfilm league printer to which the present invention is applied, Fig. 2 is a graph showing the relationship between the number of frames, film sag measures, and reel axis rotation, and Fig. 3 is a brake control according to the present invention. A block diagram of the device, FIG. 4 is a time chart of its braking, FIG. 5 is its flowchart 1, FIG. 6 is a brake control circuit diagram, and FIGS. 7 to 10 are the above-mentioned FIG. 3 of other embodiments. 〜Diagrams corresponding to FIG. 6,
111A-FIG. 13 shows another embodiment of the friction guide member, and FIG. 12 shows its operation.

Claims (1)

[Claims] (1) While feeding the roll film at high speed, search for the desired frame by marking J1 marks on each film frame;
When a desired frame is detected, a brake is applied to stop the film, and the desired frame is stopped at an enlarged projection position. Control the brakes 1
In order to stabilize the stopping of the film at the position of the mark detector, a large number of seat friction guide members are provided oppositely on the left and right sides of the mark detector, and the friction guide members abut against both side edges of the film. A roll film retrieval device characterized in that the brake is controlled so as to be activated only when the brake is young.