JP2000158396A - Perforation drilling device for film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drill perforations in a continuous film at a high speed in a prescribed condition, by providing an upper roll having a machining groove at a position facing sewing blades of a lower roll above the lower roll having sewing blades circumferentially, and arranging first and second guide rolls on both sides of the lower roll. SOLUTION: A lower roll 14 having sewing blades 11 circumferentially, and an upper roll 12 having a machining groove 13 at a position facing sewing blades 11 of a lower roll 14 are arranged. A first guide roll 16A and a second guide roll 16B are arranged on both sides of the lower roll 14. Perforations are drilled in a film 19 by sequentially inserting the film 19 from downside between the lower roll 14 and the second guide roll 16B, and between the upper roll 12 and the lower roll 14, and then the lower roll 14 and the first guide roll 16A. Thus, the perforations can be drilled in the continuous film 19 at a high speed in a prescribed condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforation processing apparatus capable of processing a perforation of a fixed size on a continuous long film without fail at a high speed.

[0002]

2. Description of the Related Art As shown in FIG. 6, a method of continuously perforating a plastic film such as a shrink film is to form an upper roll 2 provided with a sewing blade 1 in a circumferential direction.
And a lower roll 4 having a machining groove 3 at a position facing the sewing machine blade 1 below the upper roll 2, and
A first guide roll 6A is provided on both sides of the lower roll 4 and a second guide roll 6A.
A processing device provided with the guide roll 6B has been used. When the continuous film 9 is perforated using the above-described processing apparatus, the film 9 is passed through the lower roll 4 and the second guide roll 6B from below, and then is perforated between the upper roll 2 and the lower roll 4. In general, the work is performed, and the work is passed between the lower roll 4 and the first guide roll 6A.

However, when perforation processing is performed using the processing apparatus shown in FIG. 6, there is a phenomenon that the film 9 is loosened between the upper roll 2 and the lower roll 4 as shown in FIG. There was a problem that machining by the sewing machine blade was not stable. In addition, the work of confirming whether the film is perforated reliably and whether the perforation under the intended conditions is
It was confirmed not at the same time as the perforation, but at the time of processing such as bag making of the perforated film, or after processing the bag making.

[0004] As described above, the perforation processing is confirmed not at the same time as the perforation processing on the film but in the post-processing step. Therefore, if the predetermined perforation processing is not performed, the product is once commercialized. Had to be discarded.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a perforation processing apparatus which can perform perforations on a continuous film under predetermined conditions at high speed and reliably. It is an object of the present invention to provide a processing apparatus capable of confirming that the operation has been performed in a manner continuous with a perforation processing step.

[0006]

SUMMARY OF THE INVENTION The present invention provides a lower roll having a sewing machine blade in the circumferential direction, and an upper roll having a machining groove above the lower roll at a position facing the sewing machine blade of the lower roll. , And a first and a second guide roll are arranged on both sides of the lower roll. The invention according to claim 2 is a perforation processing device, wherein an optical detection device is disposed between the lower roll and the second guide roll.

[0007]

The continuous film passes between the roll with the sewing machine blade and the second guide roll from below, passes through the upper peripheral surface of the lower roll, and is processed between the first guide roll and the lower roll. The film can be kept taut. Thus, the perforation process starts when the sheet passes between the second guide roll and the lower roll, and is reliably completed when the sheet passes between the upper roll. Further, since the lower roll perforation blade for perforating the film surely penetrates the film, by detecting the length and interval of the penetrating perforation blade, the predetermined perforation is reliably performed. You can check if you are.

[0008]

FIG. 1 is a schematic explanatory view showing one embodiment of the present invention, in which a lower roll 14 having a sewing machine blade 11 in a circumferential direction and a position of the lower roll 14 facing the sewing machine blade 11 are shown. The upper roll 12 having the processing groove 13 is arranged at
This is a perforation processing device in which a first guide roll 16A and a second guide roll 16B are arranged on both sides of the lower roll 14. In addition, between the upper roll 12 and the first guide roll 16A of the processing device, along the surface of the lower roll 14,
This is a perforation processing device provided with an optical detection device 17 such as an optical sensor.

[0009] A continuous film 1 using this processing apparatus
9 to be perforated, the second guide roll 16B
The film is passed between the lower roll 14 and the lower roll 14 and then continuously passed between the upper roll 12 and the lower roll 14 and between the lower roll 14 and the first guide roll 16A. Here, since the film 19 is transported while being held by the upper peripheral surface of the lower roll 14, the tension state can be always maintained as shown in FIG. Also, since the sewing machine blade 11 of the lower roll 14 penetrates the film 19,
The sewing machine blade 14 can also serve to transport the film 19.

Next, a perforation 11 provided on the lower roll 14 is provided.
Is used to penetrate through the film 19 and be exposed above the film 19, so that the optical detecting device 17 such as an optical sensor can be used.
Thereby, it can be confirmed that the perforation processing is performed reliably.

Specifically, as shown in FIG. 3, after the perforation is performed by the upper roll 12 and the lower roll 14, the length L of the sewing blade 11 in the circumferential direction is detected by the detecting device 17 so as to be a convex portion. By detecting the reference length and the distance D between the sewing blades as the reference length of the concave portion, the state of the perforation processing on the film 19 can be confirmed.

For example, as shown in FIG.
If one of the above is missing and cannot be perforated, the distance d between the perforation blades 11, that is, the length of the concave portion is longer than the reference length D, so that a predetermined perforation is not performed. Can be detected. Next, as shown in FIG. 5, when the film 19 is not perforated while the sewing machine blade 11 is in a normal state, the length l of the convex portion is longer than the reference length L. By detecting good things, it can be confirmed that the perforations are not properly applied.

Here, the material and thickness of the film to be perforated are not particularly limited, as long as the film can be continuously processed. Then, when a defective portion of the perforation processing is confirmed, the defective portion may be removed by inputting data of the defective portion, and post-processing such as bag making may be performed. Further, the perforation to be processed is not limited to a straight line, and may be of various shapes. Further, not only one line but also two or more lines can be processed.

[0014]

According to the present invention, since the present invention has the above-described structure, the film can be perforated continuously and reliably. Also, as in the past, when processing such as bag making using a perforated film, since the state of perforation processing is detected and confirmed in advance, it is necessary to perform additional processing during processing of bag making and the like. In addition, there is no need to check the state of perforations.
This eliminates waste such as discarding a film processed with a poor perforated film.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a perforation processing apparatus of the present invention.

FIG. 2 is an explanatory view showing a perforated portion of FIG. 1;

FIG. 3 is an explanatory view showing a perforation detection portion of FIG. 1;

FIG. 4 is an explanatory diagram showing a specific example of detection of perforation processing according to the present invention.

FIG. 5 is an explanatory diagram showing another specific example of detection of perforation processing according to the present invention.

FIG. 6 is a schematic explanatory view showing a conventional perforation processing apparatus.

FIG. 7 is an explanatory view showing a perforated portion of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Sewing machine blade 12 ... Upper roll 13 ... Processing groove 14 ... Lower roll 16A ... 1st guide roll 16B ... 2nd guide roll 17 ... Detector 19 ... Film L ... Length of convex part D ... Length of concave part

Claims (2)

[Claims] 1. A lower roll having a sewing blade in a circumferential direction,
An upper roll having a machining groove is provided above the lower roll at a position facing the sewing machine blade of the lower roll, and first and second guide rolls are arranged on both sides of the lower roll. Perforation machine for film. 2. An apparatus according to claim 1, wherein an optical detecting device is disposed between said lower roll and said second guide roll.