JPH0924903A - Method for manufacturing package of sheet-like material - Google Patents

Abstract

(57) Abstract: A method for manufacturing a package of a sheet-shaped product, wherein the sheet-shaped product is packaged in a bag made of an opaque film. Provide a manufacturing method free of complications. A sheet-shaped material is placed on an opaque film that is continuously conveyed, and a position of the sheet-shaped material on the film is detected by a photoelectric switch to be converted into a signal (converted into a current value). The signal from the photoelectric switch is compared with a preset signal (stored in a computer) obtained when the position is at a predetermined position, and when the position is at the predetermined position, the sheet-like material After covering the sheet with another opaque film, the sheet-like material is wrapped and the two films are heat-sealed into a bag shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a package of a sheet material.

[0002]

2. Description of the Related Art A sheet-shaped product, for example, a so-called tape preparation in which a pressure-sensitive adhesive layer containing a drug is formed on a sheet-shaped support is sold as a package packaged in a bag made of an opaque film. There is. In-line production of such a sheet-like package is performed by placing the sheet-like article on an opaque film, covering the sheet-like article with another opaque film, and then wrapping the sheet-like article. It has been performed by a method in which the two films are heat-sealed by a sealer such as a hot sheet roll and sealed in a bag shape.
However, if the position of the sheet-like object placed on the opaque film deviates from the predetermined position, a part of the sheet-like object will be caught in the sealing portion of the film to be sealed. When opening the bag, there was a problem that the sheet could not be taken out smoothly.

Therefore, it is necessary to inspect the presence or absence of the bite in the manufacture of the package of the sheet material. Conventionally, the biting inspection of the seal portion of the bag-filled product with such an opaque film has been performed by observing the appearance of the seal portion and measuring the height of the seal portion. However, these methods are not only labor-intensive, but also prone to inspection errors.

As another inspection method for this bite, the following method can be considered. In a sealing method using a metal sealer such as a hot sheet roll, if the seal portion is bitten, the sealer shifts from a normal position during sealing. It is conceivable to use a proximity switch as a sensor for detecting this deviation. The measurement principle of the proximity switch is that a high-frequency magnetic field is generated from the detection coil, and when the metal of the sealer, which is the substance to be detected, approaches this magnetic field, an electromagnetic induction induces an induced current (eddy current) in the metal of the sealer. The impedance of the detection coil is changed by this and the oscillation is stopped to detect.
Examples of the proximity switch include an amplifier relay type proximity switch EM-030 (manufactured by KEYENCE Corp., sensor / measuring instrument general catalog third edition, issued in October 1994) manufactured by KEYENCE CORPORATION. This proximity switch is a preferable sensor in that it can detect the approach of the detection substance without contacting the metal of the sealer, which is the detection substance, but since the detection distance is 600 μm,
There is a problem that minute bites cannot be detected.

[0005]

In the above-mentioned conventional bite inspection methods, the bite detected in any of the above-described methods is such that the appearance of the seal portion is abnormal due to the bite, or the height of the seal portion is high. It was difficult to detect a minute bite with only a large bite that changed the number, and it was not possible to accurately inspect the total number to be inspected. The present invention is to solve these problems, an object thereof is a method for producing a package of a sheet-like material, wherein the sheet-like material is packaged in a bag made of an opaque film, and the film is formed into a bag-like shape. It is an object of the present invention to provide a manufacturing method in which a sheet-like material is not caught in a sealing portion for sealing.

[0006]

SUMMARY OF THE INVENTION The present invention is a method for producing a package of a sheet-like material in which the sheet-like material is packaged in a bag made of an opaque film. After placing the sheet-like object on the film, the position of the sheet-like object on the film is detected by a photoelectric switch and converted into a signal, and the signal from the photoelectric switch is obtained in advance when the position is at a predetermined position. When the position is at a predetermined position as compared with the set signal, after covering the sheet-shaped material with another opaque film, the sheet-shaped material is wrapped and the two films are formed into a bag shape. A method for manufacturing a package for a sheet-like material, which comprises sealing.

The sheet material used in the present invention is not particularly limited as long as it is a sheet, and examples thereof include the above-mentioned tape preparation. The shape of the sheet material is not limited, and examples thereof include a square shape such as a square and a rectangle; a square shape with curvature at four corners; an oval shape; a circular shape; an egg shape; The thickness of the sheet material is not particularly limited, but the thickness is comparatively thin, for example, 30 to
The present invention is particularly effective when the thickness is 500 μm, particularly 50 to 500 μm.

The opaque film used in the present invention is
If it can be manufactured in a bag shape, it is not particularly limited,
For example, a thermoplastic resin film such as polyethylene, polypropylene, or polyester; a laminated film in which an aluminum foil is laminated on a polyethylene film, or the like can be given.

The present invention will be described below according to steps. In the present invention, first, a sheet-like material is placed on an opaque film that is continuously conveyed. As the above-mentioned conveying means, any of the usually used conveying means can be used, for example,
Examples thereof include a method of pulling the film itself with a take-up roll and the like, and a method of placing the film on a conveyor and carrying it.

Next, the position on the film of the sheet-like material is detected by a photoelectric switch and converted into a signal. The photoelectric switch detects the intensity of the reflected light returning from the measured object by applying light to the measured object, and converts it into an electric signal, and the intensity of the reflected light is a change in the color of the measured object, It changes due to a change in the light reflectance of the measurement object or a change in the distance between the measurement object and the photoelectric switch. With this photoelectric switch, in order to detect the position of the sheet material on the film, the light from the photoelectric switch is applied to a specific position on the film being conveyed, and the intensity of the reflected light is changed to It is performed by converting into such an electric signal. The above-mentioned specific position on the film means that the position of the sheet-shaped object placed on the opaque film is a correct position so that the sheet-shaped object is not caught in the seal portion when the sheet-shaped object is sealed in a bag shape. Is a position that can be determined by the method described later, and this position is determined by the shape of the sheet-shaped material. Further, the number of photoelectric switches used is determined by the shape of the sheet-like material to be packed.

Next, the signal from the photoelectric switch is compared with a preset signal obtained when the position of the sheet-like object on the film is at a predetermined position. The above-mentioned preset signal is specifically a signal set by the following method using a computer, for example. First, the sheet is conveyed at a predetermined position on the film while the light from the photoelectric switch is applied to the specific position on the film. The predetermined position is a position at which the sheet-shaped material is not caught in the seal portion when it is sealed in a bag shape. Then, the intensity of the reflected light obtained from the photoelectric switch is converted into an electric signal, and the electric signal is stored in the computer. In this case, since the sheet-shaped material is placed and conveyed at a predetermined position on the opaque film, the reflected light returning to the photoelectric switch is the color and the light reflectance of the opaque film and the sheet-shaped material. Alternatively, the strength thereof lasts for a time calculated from the shape of the sheet-like material and the packaging line speed and changes at the calculated intervals due to the difference in the distance to the photoelectric switch. The photoelectric switch converts this reflected light into a signal (current) according to the intensity, and this is stored in the computer.

Comparing the signal from the photoelectric switch with the signal preset as described above, when the sheet-like object is at a predetermined position on the opaque film, the same signal as the preset signal is obtained. If the sheet is not in place on the opaque film, the signal will be different from the preset signal. This is because, when the sheet-like object is not placed on the opaque film at a predetermined position and is not conveyed, the signal (current) from at least one of the photoelectric switch or the photoelectric switches has the correct duration and Because it cannot be sent to the computer at intervals.

In the present invention, next to the above comparison, when the position of the sheet-like article is at a predetermined position, the sheet-like article is covered with another opaque film, and then the sheet-like article is wrapped and the Seal the two films in a bag. Also,
When the position of the sheet-like material is not at a predetermined position, a command is sent from the computer to a device for discharging the sheet-like material out of the line, and the sheet-like material is discharged out of the line.

The method for wrapping the sheet-like material and sealing the two films in a bag shape is not particularly limited, but for example, it is heat-sealed by a sealer such as a heat sheet roll to form a bag shape. Examples thereof include a sealing method and a bag-like sealing method with an adhesive.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (Example 1) As an opaque film, a total thickness of 10 is obtained by laminating polyethylene films on both sides of an aluminum foil.
A 0 μm film was used to produce a sheet-shaped package. FIG. 1 is a plan view showing the relationship between an opaque film, a sheet, and a monitor position of a photoelectric switch at the time of manufacturing. As shown in FIG. 1, the opaque film 1 was continuously conveyed in the direction of the arrow, and the square sheet-like material 2 was placed on the opaque film 1. The photoelectric switch detects the position of the sheet 2 on the opaque film 1 and converts it into a signal (current), sends the signal from the photoelectric switch to a computer (not shown), and stores it in the computer in advance. When the position is at the predetermined position, another opaque film (not shown. The material of the film is opaque) on the sheet-shaped material 2 is compared with the signal obtained when the position is at the predetermined position. The same as the film 1.)
Then, the sheet-like material 2 was wrapped, and the two films were heat-sealed with a heat sheet roll (not shown) and sealed in a bag shape to manufacture a package of the sheet-like material 2.

In the above manufacturing, the monitor position of the photoelectric switch is determined by the square sheet 2, the size of the bag, and the width and position of the seal, but at least when the sheet 2 is correctly placed. It is necessary to monitor the vicinity of two corners of the side perpendicular to the traveling direction of the sheet-like object 2. In this embodiment, the monitor point 11 in FIG.
And monitor at monitor point 12.

(Embodiment 2) The sheet-like material 2 was an elliptical shape as shown in FIG. 2, and was placed so that its major axis direction was parallel to the traveling direction of the opaque film 1.
A sheet-like package was manufactured in the same manner as in Example 1 except that the monitor position of the photoelectric switch was set as follows. FIG. 2 is a plan view showing the relationship between the opaque film, the sheet, and the monitor position of the photoelectric switch at the time of manufacturing.

In the above manufacturing, the monitor position of the photoelectric switch is determined from the size of the elliptical sheet 2, the size of the bag, and the width and position of the seal. At least when the sheet 2 is correctly placed. It is necessary to monitor the position where the major axis is located, and in this example, it was monitored at the monitor point 21 in FIG.

(Embodiment 3) The sheet-like material 2 was an elliptical shape as shown in FIG. 3, and was placed so that its minor axis direction was parallel to the traveling direction of the opaque film 1.
A sheet-like package was manufactured in the same manner as in Example 1 except that the monitor position of the photoelectric switch was set as follows. FIG. 3 is a plan view showing the relationship between the opaque film, the sheet-like object, and the monitor position of the photoelectric switch during the manufacturing thereof.

In the above manufacturing, the monitor position of the photoelectric switch is determined from the size of the elliptical sheet 2, the size of the bag, and the width and position of the seal, but at least when the sheet 2 is correctly placed. Where the minor axis is located,
It is necessary to monitor two points near the end in the major axis direction, and in this embodiment, the monitoring point 3 in FIG.
Monitored at 1 and monitor point 32.

(Embodiment 4) In addition to the sheet-like material 2 having a perfect circular shape as shown in FIG. 4 and the monitor position of the photoelectric switch being as shown below, A sheet-like package was manufactured in the same manner as in. FIG. 4 is a plan view showing the relationship between the opaque film, the sheet, and the monitor position of the photoelectric switch at the time of manufacturing.

In the above-mentioned manufacturing, the monitor position of the photoelectric switch is determined by the size of the perfect circular sheet 2, the bag, and the width and position of the seal, but at least the sheet 2 is placed correctly. In this case, it is necessary to monitor where the diameter parallel to the traveling direction is located, and in this example, it was monitored at the monitor point 41 in FIG.

(Embodiment 5) The sheet-like material 2 is a track-type of athletics as shown in FIG.
A sheet-like package was manufactured in the same manner as in Example 1 except that the monitor position of the photoelectric switch was set as follows. FIG. 5 is a plan view showing the relationship between the opaque film, the sheet, and the monitor position of the photoelectric switch at the time of manufacturing.

In the above manufacturing, the monitor position of the photoelectric switch is determined by the size of the track type sheet-like object 2 for the athletics, the size of the bag, and the width and position of the seal, but at least the sheet-like object 2 is placed correctly. It is necessary to monitor two points in the case where the center is located and in the vicinity of the end portion in the direction perpendicular to the traveling direction in the case of being swung, and in this embodiment, the monitoring point 51 and the monitoring point 52 in FIG. I monitored it at.

[0025]

The structure of the method for producing a sheet-like package of the present invention is as described above. According to the production method of the present invention, even a minute bite can be detected in-line and discharged out of the line. Thus, it is possible to surely manufacture an in-line package in which a sheet-like material is not caught in a seal portion that seals an opaque film in a bag shape. Further, according to the manufacturing method of the present invention, it is possible to reliably prevent the occurrence of a package in which the sheet-like material is not packaged in a bag.

[Brief description of drawings]

FIG. 1 is a plan view showing a relationship between an opaque film, a sheet-like object, and a monitor position of a photoelectric switch during manufacturing according to a first embodiment.

FIG. 2 is a plan view showing a relationship among an opaque film, a sheet-like object, and a monitor position of a photoelectric switch during manufacturing according to a second embodiment.

FIG. 3 is a plan view showing a relationship between an opaque film, a sheet-like material, and a monitor position of a photoelectric switch during manufacturing according to a third embodiment.

FIG. 4 is a plan view showing a relationship between an opaque film, a sheet-like object, and a monitor position of a photoelectric switch during manufacturing according to a fourth embodiment.

FIG. 5 is a plan view showing a relationship between an opaque film, a sheet-like object, and a monitor position of a photoelectric switch during manufacturing according to a fifth embodiment.

[Explanation of symbols]

1 Opaque film 2 Sheet material 11, 12, 21, 31, 32, 41, 51, 52 Monitor points

Claims (1)

[Claims] 1. A method for producing a package for a sheet-like product, wherein the sheet-like product is packaged in a bag made of an opaque film, after the sheet-like product is placed on the continuously conveyed opaque film. , The position of the sheet on the film is detected by a photoelectric switch and converted into a signal, and the signal from the photoelectric switch is compared with a preset signal obtained when the position is at a predetermined position. If the position is in a predetermined position, the sheet-like material is covered with another opaque film, and then the sheet-like material is wrapped to seal the two films in a bag shape. A method for manufacturing a package for an object.