JP2779902B2 - Film feed roller device for bag making - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film feed roller device for bag making.

[0002]

2. Description of the Related Art Conventionally, intermittent feeding of a bag-making film in a bag-making apparatus is performed by rotating the film through a film between a pair of feed rollers, and the feeding is reliably performed. For this reason, one of the feed rollers uses a resilient roller such as rubber, and has a structure in which the other is pressed against the other metal or rubber feed roller. Then, a tangential feed force is applied to the bag-making film passing between the feed rollers by the press contact force. In the case of a long cylindrical bag-making film, in order to seal and cut the bottom portion of the bag at the end of the transfer path, the bag-making film is intermittently fed,
The bag-making film stops while being sandwiched between the feed rollers. When the sealing and cutting are completed, the feed roller is driven again.In the case of a thin bag-making film, the film pressed against the rubber roller is lifted from the transfer path without being separated from the surface of the rubber roller, and May get caught in Further, the above-mentioned phenomenon of winding of the film for bag making may occur when re-driving after a pause or when the film for bag making is loosened due to being fast-forwarded, which hinders a smooth feeding operation. is there.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a bag making film feed roller device in which a bag making film is not involved. Aim.

[0004]

According to the present invention, there is provided a bag-feeding film feed roller device which is disposed in a bag-making film transfer path, and which comprises a pair of upper and lower feed rollers pressed against each other. At least one annular groove is formed in the upper feed roller, and the swing lever fixed to the swing shaft is
While being inserted into the groove, and provided so as to correspond to the bag-making film which is passed between the feed rollers and transferred, and the swing lever is provided so that the swinging lever moves from the transfer path of the bag-making film. Limit to detect lifting by lifting
A switch is provided, and the limit switch is used for the bag making.
Detects the lifting of the film and drives the feed roller to rotate
Is stopped .

[0005]

According to the feeding roller device bag forming film of the operation and effect of the invention-described structure, at least bag forming film during the feed operation when wanted on slightly floating from the transfer path, which is formed on the upper side of the feeding roller The swinging lever inserted into the one annular groove suppresses its lifting. However
And the big lift of the film for bag making more than that
The swing lever is lifted up and abuts against the annular groove,
Therefore, the bag-making film must not be
And not. At this time, the lifting of the film for bag making is
If it is detected by the mitt switch, the feed roller
Is stopped. Therefore, there is an effect that a smooth feeding operation of the bag making film can be ensured.

[0006]

An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a part of a transfer path 2 for a bag-making film 1. A pair of feed rollers 3 and 4 are vertically arranged with the transfer path 2 interposed therebetween and pressed against each other. The lower feed roller 3 is a metal drive roller, which is rotationally driven by a servo motor (not shown). The upper feed roller 4 is a driven roller made of rubber.

The feed roller 4 has a plurality of annular grooves 5 formed at predetermined intervals in the width direction corresponding to the width of the bag-making film 1. A swing lever 6 is provided in each annular groove 5 from the rear side to the front side in the transport direction of the bag making film 1.
Are respectively inserted. Each swing lever 6 has a feed roller 4
Is fixed to a swing shaft 7 that crosses the transfer path 2. Both ends of the swing shaft 7 are swingably supported by a pair of pivot shafts 8, 8.

The swinging lever 6 corresponds to the bag-making film 1 passing between the feed rollers 3 and 4 by its own weight, and the leading end is flipped up slightly diagonally to make the bag-making film 1 move.
It is a posture away from A contact plate 9 that rises substantially perpendicularly to the swing shaft 7 is provided, and a limit switch 10 and a stopper 11 are disposed corresponding to both sides of the upper end of the plate 9. The limit switch 10
Are interposed in a detection circuit (not shown) for detecting the floating of the bag making film 1 to be transferred. The stopper 11 regulates the posture of the swing lever 6 on the bag-making film 1.

The operation of the film feed roller device according to the above embodiment will be described below. When the bag-making film 1 that has passed between the feed rollers 3 and 4 is lifted from the transfer path 2 with the rotation of the feed roller 4 without being separated from the feed roller 4 that is a rubber roller, the swing lever 6 rotates. It swings around 7 and is lifted upward. When the bag-making film 1 is lightly in contact with the feed roller 4, the film 1 is pushed back by the lever 6. When the bag-making film 1 is strongly adhered to the feed roller 4 or when clogging occurs immediately after feeding, the rocking lever 6 moves upward to abut the annular groove 5 and to move upward. The swing lever 6 cannot be lifted. The bag-making film 1 is blocked by the swing lever 6 and does not float any further, and is not caught by the feed roller 4. When the swing lever 6 is lifted by the bag-making film 1 and the lifting of the film 1 is detected, the backing plate 9 operates the limit switch 10 to the ON side, and the rotation of the feed roller 3 by the servomotor is stopped. Is done.
In this case, the feed rollers 3 and 4 are inspected to remove the slack of the bag making film 1 and the operation is started again.

The above-mentioned film-feeding roller device for bag- making.
Has multiple annular grooves in the feed roller and inserts the swing lever to detect the lifting of the bag making film from the transfer path
With a simple structure only provided a limit switch which, bag forming film has the advantage that it is possible to prevent from being caught in the roller feed lifted up from the transport path.

[Brief description of the drawings]

FIG. 1 is a sectional view of a film feed roller device for bag making.

FIG. 2 is a plan view showing a feed roller having an annular groove and a winding prevention lever;

[Explanation of symbols]

1 → Bag-making film 2 → Transfer path 3,4 → Feed roller 5 → Circular groove 6 → Swing lever 7 → Swivel shaft 8 → Pivot shaft 9 → Back plate 10 → Limit switch 11 → Stopper

Claims (1)

(57) [Claims] An at least one annular groove is formed in an upper feed roller of a pair of upper and lower feed rollers which are disposed on a transfer path of a bag making film and pressed against each other , and is fixed to a swing shaft.
The swing lever is inserted into the annular groove, the feed
Corresponds to the bag-making film that is transported between the rollers
To so provided, that the該揺Do lever is lifted by lifting from the transfer path of the bag film
A limit switch for detecting the
Detects the lifting of the bag-making film
A film-feeding roller device for a bag-making film, wherein the driving of the roller is stopped .