JPS60112557A - Continuous film feeding method and device - Google Patents

Abstract

PURPOSE:To improve the efficiency and to reduce damage of film by feeding the remaining film with high speed when the film supply source is near empty and mounting a new film supply source. CONSTITUTION:A film detection sensor 9 is provided to a film reel 1 to detect the state when the film supply source is near empty. Then the remaining film is fed with high speed to feed the temporarily retarded portion of film and during the interval when said portion is being fed with normal speed to next process, a new film supply source is mounted to connect both films. Since the film reel 1 can be replaced without influencing to following process, the efficiency is improved while damage of film can be reduced.

Description

[Detailed Description of the Invention] This invention is designed to prevent film supply from being interrupted when the film reel is empty and replaced with a loaded film reel when continuously supplying film. The present invention relates to a film feeding method and apparatus for temporarily feeding film at high speed and accumulating it in an accumulator, during which time a new film reel is loaded.

The provision of an accumulator (temporary storage box) itself in such a film supply system was proposed by the Special Publication Publication No. 45-2.
This is a technique known in Japanese Utility Model Publication No. 2118, Japanese Utility Model Publication No. 48-34459, etc. However, in these techniques, the accumulator is used to retain the film for safety purposes, and must be kept there all the time, which may cause unfavorable effects such as friction on the film. This invention does not allow the film to remain in the accumulator at all times,
This is to temporarily hold the film when changing the film reel, to provide time for changing the film reel, and to prevent defects caused by the film being stuck.

In the figure, 1 is a film reel loaded with film F;
2Fi free roller, 3 is a dancer roller provided between free rollers 2 and 2, 4 is a film connecting device, which may be a known device, 05 is a drive roller with a latch, 6 is a film connection device. 7 is a drive roller; 8 is a dancer roller; 9
is the film located near the center of the film reel.
fl output sensor (ml), film detection sensor (second) that detects the film 15 in the 10B accimulator
It sends a signal when the film runs out. 11 is a motor that drives the film reel 1 (first drive unit [), 1
2 is a motor (second drive device) that drives the drive roller 5 and has a timer, 13 is a motor that drives the drive roller 7 (third drive device), and each motor is a variable speed motor. o 14 shows the state of the film F during normal operation, and 15 shows the state when it is retained. The dancer roller 3 has a device that sends a signal according to its displacement, and this signal controls the motor 11 to control the speed of the film reel 1, while the dancer roller 8 also responds to the change. The motor 13 is controlled by transmitting a signal to control the speed of the drive roller 7.

Next, the operation of the method and apparatus of the present invention will be described below. When the film F is being fed under normal conditions, it is under tension in the accumulator as shown in 14. - controlled by roller 3.8.

Control of the overall speed and feeding of the film F are performed as follows.

The film F is constantly drawn out in the previous process (not shown), but the quick drying and drive rollers q and v are detected by the dancer roller 8 and the dancer roller 8 is displaced. 1B, the motor 13 which drives the drive roller 7 is controlled, and the feed error k is adjusted.

On the other hand, the motor 12 that drives the drive roller 5 is normally stopped, but since both sides are connected to each other, the drive roller 5 is idle and does not interfere with the movement of the film. . The difference in speed between the continuous film and the film reel 1 in this state is similarly detected by the turner roller 3, and a signal is sent to the motor 11 that drives the film reel 1 based on the displacement [iL;
Also controlled to match the speed of the film.

In this way, the film F is smoothly fed while the motors 11 and 13 are constantly controlled.

Then, when the film is supplied from the film reel 1 and the amount of film in the film reel 1 decreases, this state is detected by the film detection sensor 9. This detection signal starts the motor 12 and drives the drive roller 5 via the latch at a speed of about 2 times the normal film feeding speed of i+fl. At the same time, the motor 11 is also driven at a speed corresponding to the displacement of the dancer roller 3. For this reason, the film 15 of the accumulator 6173 is naturally folded to the right as shown in the figure.
It stays inside and gets stirred. When the film in the film reel 1 runs out, the dancer roller 3 is moved in the opposite direction and the motors 11 and 12 are stopped because the dancer roller 3 wants to receive tension. At this time, it is convenient to connect the film if the end of the film is stopped at the film connecting device. This can be controlled by the timing of stopping the motor 12, a timer, or a photoelectric tube.

After replacing the film reel 1 with a new one and connecting this film and the previous film with the film connecting device 4, the film reel 1 is reversed to apply appropriate tension to the film and the dancer roller 3 is placed in an appropriate state. Then, by pressing the "Complete" button which is the control button of the signal circuit changeover switch, the film exchange is completed.

During this time, the film 15 remaining in the shear accumulator continues to be pulled out by the drive roller 7, and one of the left and right film detection sensors 10 indicates that the film 15 is no longer present, and at this time the completion button is pressed. The presser sends a start signal to the motor 12, and the drive roller 5 feeds the film at a slightly slower speed than usual. Accordingly, this speed is also transmitted via the dancer roller 3 to the motor 11 which drives the film reel 1 and controls it accordingly.

When the film in the accumulator 6 reaches the state 14, the drive roller 5 is driven faster than the drive of the motor 12 by the film, but since the drive roller 5 can slip against the drive of the motor 12 due to the latch, the drive roller 7 Therefore, the dancer roller 3 is displaced and sends a speed-up signal to the motor 11. The motor 12 is stopped after a certain period of time according to a timer. However, since the drive roller 5 is attached via a latch, there is no problem with the movement of the film.

In this way, normal film feeding is performed again. The position of the film detection sensor 9 may be set in consideration of the time required to replace the reel Q.

Also, when the film detection sensor 10 detects that there is no film 15 and the reel exchange is not completed and the completion button is not pressed, the film removal sensor 10 detects the drive roller 7, the drive motor 13, and the drive motor 13 for the subsequent process. Send a stop signal to Shigang. As described above, in the present invention, the film F" is accumulated in the accumulator 6 when reeling the film reel 1, so the film reel 1 can be replaced without affecting the subsequent process at all. The efficiency is good and the probability of damaging the film itself is significantly reduced.

Furthermore, the structure of the accumulator 6 can be significantly simplified.

Although the practical explanation has been given using Film F, it is clear that it can be applied to any flexible long object.

[Brief explanation of the drawing]

The figure shows an implementation of the apparatus used in the method of this invention. The first figure is a diagram showing the entire device, and the second figure is a front view of the device viewed from directly above. In the figure, 1: Film reel 2: Free roller 3: Dancer roller 4: Film connecting device 5 Nidry roller 6:
Accumulator 7: Drive roller 8: Dancer roller 9: Film output sensor (first) 10: Film detection sensor (#g2) 11: Motor (@-body drive source 12: Motor (third drive source) 13: Motor (third drive source) 14: Film state during normal operation 15: Film trade dispute patent applicant Toyo Seikan Co., Ltd. (and 1 other person) Applicant's agent Patent attorney Fumika Sato (and 1 other person)

Claims (1)

[Claims] 1) In a method for continuously supplying a long film, when the film supply source is about to become empty, this is detected and the remaining film in the film supply source is supplied at full speed. The temporary retention part of the film is supplied, an uninterrupted film supply source is loaded while the film of this retention part is supplied to the next process in a normal continuous application, and both films are connected. Continuous feeding method 0 2) %h in which the end of the film is stopped on the connecting device when delivering the film retention portion 3) Method opening of claim 1 3) A film reel loaded with film, and a film reel loaded with film. A first drive device that drives the reel, a Tsuru film detection sensor installed near the center of the film reel, a first dancer roller installed after the film reel, and a first dancer roller that retains the film. a second film detection sensor provided on the accumulator, a first drive roller provided immediately before the accumulator, and a second film detection sensor provided on the accumulator; A second V drive device that is driven at high speed by a detection signal of A target provided on the third drive device to drive, the second υ main roller, and the first dancer roller that stops the -υ drive device and the second drive device when the film loses tension. Continuous film feeding device that operates in parallel with a signal generator.