JPS5978060A - Automatic continuous feeder for film - Google Patents

Abstract

PURPOSE:To permit unmanned operation for a long time by installing an automatic feeder which feeds a packaged film continuously for a long time, onto a high-speed packaging machine which is operated continuously or intermittently, thus removing the work for supervision. CONSTITUTION:An automatic continuous feeder 1 consists of a film feeder 2, detection apparatus 4 for detecting the terminal edge of a film, film connection mechanism 5, film feeding mechanism 6, and a stepped roller apparatus 7. Said film feeding mechanism 2 is equipped with an index unit 20 installed onto the back side of a vertical frame 10, index table 22 fixed onto the output shaft 21 on the index unit, and a driving motor 24. When the terminal edge of a preceding film (f) is detected by the detection apparatus 4, film feed is suspended by the detection signal supplied from the detection apparatus, and the table 22 is put into 1/4 revolution, and the tape (t) at the top edge of a succeeding roll (r) is superposed onto the terminal edge of the preceding film (f), and a connection lever 52 presses the tape for connection. Then, a roller 63 is revolved, and film feed is started again.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic film feeding device capable of continuously feeding packaging film for a packaging machine for a long period of time.

The automatic supply of packaging film has long been an issue as packaging machines become more automated and faster.

However, in conventional devices, for example, as in Utility Model Publication No. 49-65405, a hood film is placed side by side with a spare film, the end of the film being used is detected, and the film is attached to the connecting end of the spare film. Since we only have one spare film at most, such as one for crimping and connecting a certain adhesive tape to the terminal end, we can prepare both the container forming film and the sealing film that covers the container in one day. There was a problem in that the film had to be replenished several times and manpower was required for monitoring.

The purpose of the present invention is to eliminate the trouble of monitoring and enable unmanned operation for long periods of time in high-speed packaging machines that operate continuously (or intermittently) (intermittent operation is also possible), reducing the number of workers. The goal is to

The automatic continuous feeding device of the present invention has a plurality of units rotatably attached to the periphery of an index table that intermittently rotates a roll of film with a connecting tape pasted to the tip thereof, and is installed close to the position where the film is pulled out from the index table. A detection device for detecting the end of the film that has been pulled out, and a connecting device that presses and adheres the connecting tape of the film to be supplied next to the trailing end of the film, and A pull-out roller is provided to allow the operation of the pull-out roller to be controlled by a detection signal from the detection device, and a stepped roller downstream of the pull-out roller is provided to enable the supply of film to the subsequent process even when the pull-out roller is stopped. It is characterized by the fact that it is equipped with a device that allows it to continuously supply film for a long period of time.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an automatic continuous film feeding apparatus according to the present invention will be described with reference to the drawings.

The automatic continuous feeding device 1 of this embodiment is roughly divided into a film feeding mechanism 2 and a detection device 4 for detecting the end of the film.
, a film connecting mechanism 5 , a film feeding mechanism 6 , and a step roller device 7 .

The film supply structure 2 is attached to the back side of the vertical frame 10, and includes a vertical index unit 20 and a frame 1.
The index table 22 is fixed to an output shaft 21 of an index unit projecting at right angles in front of the index unit, and a drive motor 24 is connected to an input shaft 26 of the index unit via a bell.

A timing cam 26 is attached to the cam shaft 25 of the index unit 20, and a micro switch 27 is operated by this timing cam 26.

A plurality of (four in this embodiment) support shafts 61 that rotatably support the film roll r are fixed to the index table 22 in the circumferential direction 1 (equally spaced apart. A stopper of a known structure is removably attached to the tip to prevent the film roll from coming off.

The index table 22 is further provided with a guide roller 63 and an L-shaped lever roller 4 rotatably mounted in the vicinity of each support in the positional relationship shown in FIG. A pressure roller 65 that cooperates with the guide roller 36 to hold the leading edge of the film pulled out from the film roll r is rotatably attached to one end of each lever 3B. The other end of the lever roller 4 is arranged so that the pressure roller is pressed toward the guide roller roller 6 by the spring roller 6.
Being pressed. An adhesive tape t is attached to the tip of the film f.

The film connection mechanism 5 includes a guide table 51 fixed to the frame 10 adjacent to the index table 22, and an L-shaped connection lever 52 rotatably extended next to the guide table. The connection lever 52 is formed with a pressing surface 5 for pressing the film f and tape t against the guide rail 51 to connect them, and has a cylinder 54 connected to the other end. The connection lever 52 is rotated by the operation of this cylinder 54, and it presses the surface film f.
and the tape t are pressed against the guide rail.

In addition, as shown in FIG. 2, the guide rail 51 is
It is positioned so that its upper surface is aligned with the extending direction of the leading end of the film f of the film roll γ on the index table stopped at the film supply position A.

The detection device 4 is a photoelectric detection device that is provided between the index table 22 and the guide rail 51 and detects the end of the tape.

The film feed mechanism 6 includes a shaft 62 rotatably attached to a bearing 61 (FIG. 1) provided on the frame near the end of the guide rail 51, a feed roller 6B fixed to the shaft 62, A pressure roller 65 attached to one end of a reno-64 rotatably attached to the frame adjacent to the shaft 62, a spring 66, and a motor 67 with a brake of a known structure for rotating the shaft 62. The pressure roller 65 presses the film f against the feed roller 66, and the rotation of the feed roller pushes the film f toward the roller γ.
Pull it out and send it downstream.

The step roller device 7 includes a pair of guide rods 71 arranged parallel to each other on the frame 10, and a slider 7 supported and guided so as to be movable in a substantially horizontal state on the guide rods.
2, a plurality of guide rollers 76 rotatably mounted on the slider 72, a plurality of guide rollers 74 rotatably attached to the frame, and a plurality of guide rollers 74 mounted vertically along the guide rod. a plurality of detection devices 75a,
75b.

75C. As shown, the film f is guided downstream through a plurality of guide rollers 74 and 76 alternately. This stepped roller device 7 is used in cases where it is difficult or impractical to make the feeding speed of the film by the feed roller 6 exactly the same as the film consumption speed of the device provided on the downstream side 1. It is provided to absorb the difference in the feed speed between the two, and is preset so that the feed speed of the feed roller 6 is greater than the consumption speed of the downstream side. In normal times (when the leading film and trailing film are not connected)
, when the feed roller 6 rotates and sends out the film f, and the slider 72 is at the lower position as shown in the figure (because the feed speed of the feed roller is faster than the downstream consumption speed, the step roller device part The length of the accumulated film becomes longer, and in order to absorb the longer length ((the slider 72 descends due to its own weight while applying a constant tension to the film), this is detected by the detection device 75a, and the detection signal is The rotation of the motor 67 for driving the feed roller 6 is stopped.

When the film f is consumed, the film absorbed by the step roller device is consumed in proportion to the consumption, so the slider 72 gradually moves up. When the slider 72 comes to the position of the detection device 75a, the detection device detects this, and the signal causes the drive motor for one of the feed rollers 6 to rotate.

On the other hand, when the film end detection device B detects the end of the film, the end of the preceding film and the leading end of the succeeding film are connected, and the upper limit position of the slider 72 is switched in response to the detection signal. Slider 72
The rotation of the feed roller drive motor 67 is stopped only when the feed roller drive motor 67 reaches the position of the detection device 75C.

Next, operation 1 of the automatic continuous feeding device will be explained with reference to FIGS. 1 to 6.

When the leading film f is used up as shown in FIG. The rotation of the motor is rapidly stopped by the brake action, and the film advance is stopped.

On the other hand, the motor 25 is rotated by the detection signal of the end of the film, rotates the index table 22 by 50%, and then sends the next roll r to the film supply position. When the roll r is sent to the supply position, the tape t that sticks to the drawing end or leading edge of the film is superimposed on the end of the preceding film f stopped on the guide rail 1, and then the connecting lever 52 is moved. Rotate and press the tape with the connection lever to make the connection (Fig. 6 [B]). When the connection of the film is completed, the connection lever 52 is in the state shown by the broken line (Figs. 2 and 3).
C]).

During this connection, the rotation of the feed roller 6 is stopped as described above, the film stored in the stepped roller device is consumed, and the slider is moved upward.

After the connection of the film is completed, the slider 72 is detected by the detection device 75C, and then the feed roller 66 is rotated and the feeding of the film f is resumed until the slider 72 is detected by the detection device 75a.

Thereafter, it is possible to continue supplying film 1 (1) automatically in the same manner without requiring any human intervention until the multiple rolls γ on the index table are used up, and it is also possible for a person to come around to check on the film before the last roll is consumed. Continuous supply is possible by supplying new rolls to the empty spindle.

Note that the number of rolls supported in the index table is not limited to four, and may be more than two (\).

If unmanned operation for an even longer period of time is required, the devices may be arranged on a conveyor or chute and automatically attached one by one onto an index disk.

As described above, the automatic continuous feeding device of the present invention allows film to be fed continuously for a long period of time (by setting the film once, without any manual effort), thereby improving efficiency.

[Brief explanation of drawings]

FIG. 1 is a top view of the automatic continuous film feeder according to the present invention, FIG. 2 is a front view of the automatic continuous feeder of FIG. 1, and FIG. 6 is the automatic continuous feeder shown in FIGS. 1 and 2. FIG. 3 is an explanatory diagram of the operation of the supply device. 1: Automatic continuous supply device 2: Film supply mechanism 20: Index unit 22: Index table 4: Detection mechanism 5: Film connection mechanism 6: Film feeding mechanism 7: Step roller device patent application, applicant: CKD Co., Ltd.

Claims (1)

[Claims] A plurality of rolls of film, each with a connecting tape attached to the tip, are placed around the periphery of an index table that is rotated intermittently. and a connecting device that presses and adheres the connecting tape of the next film to be supplied to the trailing end of the film, and a pull-out roller that draws out the film in proximity to the connecting device. A step roller device is provided downstream of the pull-out roller to enable the film to be supplied to a subsequent process even when the pull-out roller is stopped. An automatic continuous film feeding device characterized by: