JPH0725439B2 - Film feeding machine equipped with film connection mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides a container containing an article or a synthetic resin film or other film for directly packaging the article from a film roll. The present invention relates to a film feeding machine equipped with a film connecting mechanism capable of connecting the leading end of another film roll to the end.

[Prior Art] Conventionally, a packaging film or the like is wound in a roll,
The film roll is rotatably held and guided by the roller, and the film is fed to a use place and used.

By the way, the length of the film roll is limited, and when the end of the roll is reached during use, a new film roll must be replaced. In this case, in order to save the trouble of replacing the film rolls one by one, the spare film rolls are rotatably juxtaposed, and the end of the film roll in use and the tip of the spare film roll are bonded together. ing.

Conventionally, this film is laminated by overlapping each end of the film to be laminated and laminating the overlapping portions with adhesive tape (see Fig. 12), or by using a double-sided adhesive tape between the overlapping films. It is performed by sandwiching them together (see Fig. 13) or by bonding both films by heat-sealing the overlapping part (see Fig. 14), and all of these operations are manual work. In some cases, it was necessary to shut down the packaging machine.

[Problems to be Solved by the Invention]

However, according to the pasting of the film with the conventional adhesive tape, the connecting part becomes thick because the films overlap each other, which not only hinders the feeding of the film but is also difficult to use in many cases. There was a problem that the adhesive surface of the product was easily peeled off.

The present invention solves such a conventional problem, and while the film is being fed out, it is connected to a spare film roll without interrupting the use of the film, and the thickness of the connection part is minimized. Therefore, it is an object of the present invention to provide a film feeding machine equipped with a film connecting mechanism which can be automated and can be improved in working efficiency without peeling.

[Means for Solving the Problems]

The present invention is provided with a film roll holding unit for rotatably holding a film roll and a spare film roll, and a guide roller group including a payout roller for paying out a film from each of the film rolls, and a stock is provided at the film payout unit. A box is interposed, each of the film roll holding parts is provided with a remaining amount detection part of the film roll, and further a film end detection part is sequentially provided in the film transfer path leading to the feeding part, and a cutter and a film connection for cutting the film end part. And a film connection portion, a feeding film end detecting portion for detecting a film end cut by the cutter, and a new film leading end detecting portion for detecting a leading end of the preliminary film roll,
And an auxiliary guide for connection for holding the end and the leading edge of the film in butt contact with each other, and an adhesive tape device head having suction rollers that adsorb the back surface of the film and provided reciprocating folding rollers at both ends. And the auxiliary tape guide for connection can be made to face each other, and the adhesive tape mounting head and the auxiliary guide for connection can be brought into contact with and separated from the film surface with respect to each other. It is a machine.

[Work]

In the present invention having the above configuration, when the remaining amount of the film roll in use is detected and reaches a predetermined amount, it is fed out at a speed faster than the normal use amount and the remaining amount is stocked in the stock box, and then the film end is detected. Part detects the end of the film roll, feeds this film, sends the end to a cutter and cuts it for edge alignment, and further feeds the cut film end of the auxiliary guide for connection of the film connection part. Send to the end detector and stop. Next, a spare film roll (the end of the spare film roll is usually cut to match the angle of the cutter) is sent to the connection auxiliary guide to the new film leading edge detection unit, and this film leading edge is sent first. Stop by abutting the end of the film provided.

On the other hand, in the adhesive tape device head, an adhesive tape that has been cut a little longer than the film width in advance is adsorbed on the back surface with the adhesive surface outside and the adhesive tape device head is rotated to remove the adhesive surface of the adhesive tape. The auxiliary guide for connection and the adhesive tape device head are brought into pressure contact with each other so as to face the abutting surface of the film, and the film is affixed with the adhesive tape while the abutting surface of the film is abutted.

After that, the auxiliary guide for connection and the adhesive tape device head are separated, the folding rollers at both ends of the adhesive tape device head are moved, both ends of the adhesive tape are folded on the other surface of the film, and then the auxiliary guide for connection and the adhesive tape are again provided. The device head is pressed into contact, and the folded adhesive tape is securely pressed against the other surface of both films to complete the film connection.

During the connection of this film, the film stocked in the stock box is used, and when the use of the stock is finished, the film is again fed from the spare film roll.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 is a frame, and a film roll 2-1 and a preliminary film roll 2-2 are provided below the frame 1. Holding units 3-1 and 3-2 for rotatably holding the respective units are provided, and a feeding roller 4 for feeding the film from the film roll 2-1 or the preliminary film roll 2-2 and other guide rollers 5 ,. Further, a roller group is provided, and a film stock box 6 is provided in the film feeding portion, and the fed film is once drawn into the stock box 6 and then drawn out to a use place.

In addition, the film roll 2-1 and the spare film roll 2-
Each of the holding units 3-1 and 3-2 of No. 2 has a film roll remaining amount detection unit 7-1 that detects the remaining amount of each film roll.
7-2 is provided.

After the first guide rollers 5-1 and 5-2 for guiding the respective films in the transfer path of the film fed from the film roll 2-1 or the preliminary film roll 2-2, the film end detecting unit 8- 1, 8-2 are provided, followed by pinch rollers 9-1, 9-2 which sandwich the film when the end of the film is detected. Further, after the guide roller 5 following the pinch rollers 9-1, 9-2, a cutter 10 for cutting the end portion of the transported film at 90 ° with respect to the longitudinal direction of the film.
Is provided, and after that, a film connecting portion A described later is provided.

As shown in detail in FIG. 2, the film connecting portion A comprises an auxiliary connecting guide 11 and an adhesive tape device head 12,
The connection auxiliary guide 11 is sent from the film roll 2-1, and the film 13-1 cut by the cutter 10 in front of it.
It is equipped with a feeding film end detecting unit 14 for detecting the end of the film 13 and a new film front end detecting unit 15 for detecting the end of the film 13-2 fed from the spare film roll 2-2. -2 is supported by the frame body 1 by the arm 16 so as to be held in abutment with the tip end of -2. On the other hand, on the surface of the adhesive tape device head 12, a suction pipe 18 is provided to adsorb the back surface of the adhesive tape 17 opposite to the adhesive surface.
Is provided with a suction port 19, and adhesive tape 17 is provided on both ends.
Folding rollers 21-1 and 21-2, which are moved by folding cylinders 20-1 and 20-2, respectively, are provided to fold both sides of the film 13-1 and 13-2 to the back surfaces of the abutting surfaces of the films 13-1 and 13-2. The tape device head 12 is rotated 180 ° by a rotary shaft 22 rotatably supported by the frame 1 so that its surface can be opposed to the auxiliary connecting guide 11 and is also connected to the adhesive tape device head 12. The auxiliary guide 11 for the vehicle can be contacted and separated.

In addition, the film roll remaining amount detectors 7-1 and 7-2, the film end detectors 8-1 and 8-2, and the feeding film end detector 1
4. It is convenient to use a photoelectric switch or the like for the detection unit such as the new film front end detection unit 15.

Now, to explain the film connection, the remaining film amount (about 10 m) of the used film roll 2-1 is detected by the remaining film roll detector 7-1, and the feeding roller 4 doubles the normal speed. The film 13-1 is stocked in the stock box 6 at about the above speed (about 20 m / min). Then, the end of the film 13-1 to be fed out is detected by the film end detecting section 8-1 to detect the pinch roller 9-1.
To nip the film 13-1 and align the edges of the film 13-1 with 90 in the longitudinal direction of the film 13-1.
After cutting with the cutter 10, the feeding roller 4 is slowed down and the cut end is fed to the feeding film end detecting portion 14 of the auxiliary connecting guide 11 of the film connecting portion A and stopped (see FIGS. 3 and 4). ). At this time, the film remaining after cutting is discharged by reversing the pinch roller 9-1.

Further, the spare film roll 2-2 (the tip of the film has been cut to 90 ° in advance) uses the pinch roller 9-2 to connect the tip of the film 13-2 to the new film tip detector 15 of the auxiliary guide 11 for connection. The film 13-1 is fed to and stopped, and is abutted against and held by the end of the previously fed film 13-1 (see FIGS. 5 and 6).

On the other hand, in the adhesive tape device head 12 of the film connecting portion A, the adhesive tape 17 that is cut in advance to a certain size slightly longer than the width of the film is used as the adhesive surface outside and the back surface is a suction port.
It has been sucked up by the vacuum generated at 19 (see Fig. 7), and this adhesive tape device head 12 is rotated 180 ° and the adhesive tape 1
The adhesive surface of 7 is opposed to the abutting surface of the end of the film 13-1 and the tip of the film 13-2, and the auxiliary connection guide 11 is moved horizontally (it is convenient if the adhesive tape device head 12 can also be moved horizontally). By repeatedly pressing the film abutting surface against the adhesive tape 17, the adhesive tape 17 is pressure-bonded to the abutting surface (see FIG. 8).

Then, apart from the auxiliary guide 11 for connection, since the film butt surface is pressure-bonded to the adhesive tape 17 adsorbed to the adhesive tape device head 12, the folding cylinders 20-1, 20- at both ends of the adhesive tape device head 12. 2 is operated to move the folding rollers 21-1 and 21-2 so that both ends of the adhesive tape 17 are folded to the other surface of the film (see FIG. 9), and the auxiliary connecting guide 11 and the adhesive tape device head 12 are again provided. And press the end of the adhesive tape to the other side of the film to complete the connection of the film (see Fig. 10).
It becomes like the figure.

A stock box 6 is provided at the connection part of such a film.
Since it is possible to use the film stocked in the film, it is possible to use the film 13-2 of the spare roll 2-2 after the connection is completed without interrupting the feeding of the film for the connection.
Is used for feeding. Then, when the remaining amount of the spare film roll 2-2 becomes small, the connection as described above is repeated, and the film roll 2-1 and the spare film roll 2-2 are alternately used. Further, when the connecting auxiliary guide 11 and the adhesive tape device head 12 are separated from each other, the folding rollers 21-1 and 21-2 fold the extra length portions on both sides of the adhesive tape 17 to the other surface of the film abutting portion to attach the adhesive tape ( (See FIG. 9), and thereafter, the connecting auxiliary guide 11 and the adhesive tape device head 12 perform the pressure contact action again (see FIG. 10), so that both side edges of the adhesive tape 17 may protrude from the side edges of the film. It is possible to prevent any trouble in feeding or using the film.
Furthermore, it can be expected that the both ends of the adhesive tape are surely pressure-bonded to the other surface, thereby strongly strengthening the film connection.

Note that the film connection as described above can be easily automated by associating each detection unit, the operation unit, and the like with each other.

[Effects of the Invention] According to the present invention as described above, when the remaining amount of the film roll in use becomes small, a certain amount of the film is stocked so that it can be paid out to the payout part. It can be continuously and smoothly delivered, and work efficiency can be improved and automation can be realized.
Further, since the films are taped in a butt-to-face condition, it is possible to maintain the film thickness to a constant value with almost no change. Moreover, since the tape extra length portion at the side edge of the film abutting portion is folded inward and adhered, curling and the like can be prevented even with a thick film,
It is possible to surely prevent the film from being unrolled or used, and it is possible to remarkably strengthen the connection of the film. Further, unlike the conventional heat seal, the adhesive surface is not peeled off at all, and the film connection can be easily automated and the working efficiency can be extremely improved, which is a particular effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a detailed perspective view of a film connecting portion of FIG. 1, and FIGS. 3 to 10 are film connecting portions. FIG. 4 is a side view of FIG. 3, FIG. 6 is a side view of FIG. 5, FIG. 11 is a cross-sectional view of the side edge of the connected film, and FIGS. FIG. 14 is a sectional view of a conventional film connecting portion. 1 ... frame, 2-1 ... film roll, 2-2 ... preliminary film roll, 3-1 and 3-2 ... holding part, 4 ... feeding roller, 5,5-1,5-2 ...... Guide roller, 6 …… Stock box, 7-1,7-2 …… Film roll remaining amount detector, 8-1,8-2 …… Film end detector, 9-1,9-
2 ... Pinch roller, 10 ... Cutter, 11 ... Connection auxiliary guide, 12 ... Adhesive tape device head, 13-1, 13-2
...... Film, 14 ...... Feed-out film end detector, 15 ...
… New film leading edge detector, 16 …… Arm, 17 …… Adhesive tape, 18 …… Suction tube, 19 …… Suction port, 20-1, 20-2…
… Folding cylinders, 21-1, 21-2 …… Folding rollers,
22 …… Rotating axis.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-144267 (JP, A) JP-A-56-12247 (JP, A) Actual development Sho-57-71006 (JP, U)

Claims (1)

[Claims] 1. A film roll holding part for rotatably holding a film roll and a spare film roll, respectively.
A guide roller group including a payout roller for paying out a film from each of the film rolls is provided, a stock box is interposed in the payout part of the film, and a remaining amount detection part of the film roll is provided in each of the film roll holding parts, Further, a film end detection part, a cutter for cutting the film end part, and a film connection part are sequentially arranged in the film transfer path to the feeding part, and this film connection part detects the film end cut by the cutter. A feeding film end detection unit and a new film leading end detection unit for detecting the leading end of the preliminary film roll, and a connection auxiliary guide for holding the end and the leading end of the film in abutting contact with each other and adsorbing the back surface of the adhesive tape to both ends. The adhesive tape device head is provided with a folding roller capable of reciprocating in the A film connecting mechanism characterized in that the tape device head is turned around so as to be able to face the connecting auxiliary guide, and the adhesive tape device head and the connecting auxiliary guide can be brought into contact with and separated from the film surface. Film feeding machine equipped with.