JPH0740001B2 - Method and apparatus for detecting defective seal of medicine package - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention stores a content such as a tablet in a molding recess of a synthetic resin sheet, and an aluminum packaging film on the sheet so as to close the molding recess. The present invention relates to a method and apparatus for detecting a seal defect of a medicine package for detecting a defect of the heat seal of an aluminum packaging material film in a medicine package formed by heat-sealing.

[Prior Art] As a conventional method for detecting a seal defect of a medicine package of this type, for example, a method disclosed in JP-A-62-163950 is known.

In this conventional method, the aluminum packaging material film surface of the medicine package is irradiated with light from a light projector, the light reflected from the film surface is detected by a light receiver such as a line sensor and converted into an electric signal, and this electric signal is preliminarily obtained. Compared with the set reference value,
When the detected light amount is equal to or larger than a predetermined value, it is determined that the sticker is normal, and when the light amount does not reach the predetermined value, it is determined that the sticker is defective.

[Problems to be Solved by the Invention] However, generally, on the surface of the aluminum packaging material film 5 of the medicine package, as shown in FIGS. 4 and 5, over the entire surface except the storage portion for the contents such as tablets. Since the mesh-shaped heat-bonding seal groove 7 having a predetermined depth is formed, the film 5 surface on which the heat-bonding sealing is normally performed causes irregular reflection in the seal groove 7 to substantially reduce the amount of reflected light. However, on the surface of the film 5 where the heat-bonding seal is defective and the seal groove 7 having the predetermined depth is not formed, the amount of reflected light increases without causing irregular reflection.

Therefore, as in the conventional method described above, when the amount of light reflected from the surface of the aluminum packaging material film 5 is equal to or larger than a predetermined value, it is determined that the seal is normal, and when the amount of light does not reach the predetermined value, it is determined that the seal is defective. If so, there is a problem in that the discrimination standard is completely reversed, and it is not possible to accurately detect a seal defect.

Further, on the surface of the aluminum packaging film 5 on which the mesh-shaped heat-sealing groove 7 is formed as described above, waviness is generated on the surface and the optical axis of the reflected light is likely to be unstable. The conventional method in which the reflected light from the five surfaces is directly received by a light receiver such as a line sensor has a problem that it is not possible to accurately detect even a small seal defect.

The present invention has been made by paying attention to the problems existing in such a conventional technique, and an object thereof is to determine the amount of light reflected from the aluminum packaging material film surface of the medicine package as a regular standard. It is possible to accurately detect the sealing failure by making a determination based on the above, and even if the optical axis of the reflected light is unstable due to the presence of undulations on the surface of the aluminum packaging material film, details of the sealing failure can be detected. It is an object of the present invention to provide a method and a device for detecting a defective seal of a medicine package, which can surely detect up to.

[Means for Solving the Problems] In order to achieve the above object, in the method for detecting a seal defect of a medicine package according to claim 1 of the present invention, the aluminum packaging film surface of the medicine package is irradiated with light. Then, the light reflected from the film surface is detected, and when the detected light amount is less than or equal to a predetermined value, it is determined as a normal seal, and when the light amount exceeds the predetermined value, it is determined as a defective seal.

Further, in the apparatus for detecting a seal defect of a medicine package according to claim 2, a light projector that irradiates the surface of the aluminum packaging film of the medicine package with light, and an opaque translucency that receives light reflected from the surface of the aluminum packaging material film. A screen, a light receiver that receives light from the screen and converts the light amount into an electric signal, and compares the electric signal from the light receiver with a preset reference value.When the light amount is less than a predetermined value, it is normal. It is characterized in that it is provided with a discriminating means for discriminating a sticker and discriminating a defective seal when the light quantity exceeds a predetermined value.

[Operation] According to the method for detecting the seal defect of the medicine package configured as described above, the surface of the aluminum packaging film film on which the heat-sealing is normally performed has a mesh-shaped heat-bonding of a predetermined depth on the surface. A seal groove is formed, and diffuse reflection occurs in the seal groove to substantially reduce the amount of reflected light. Therefore, the detected amount of reflected light becomes a predetermined value or less, and it is determined that the seal is a normal seal. On the other hand, on the film surface where the heat-sealing is defective and the seal groove with the predetermined depth is not formed, the amount of reflected light increases without causing irregular reflection, so the detected amount of reflected light exceeds the predetermined value and is defective. It is determined to be a seal.

Further, in the device for detecting seal failure of the medicine package configured as described above, the light reflected from the aluminum packaging material film surface is once received by the screen and guided to the light receiver in a state where the change in the reflected light is corrected. . Therefore, even if there is undulation on the surface of the aluminum packaging material film and the optical axis of the reflected light becomes unstable, it is possible to reliably detect even a small seal defect.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

First, the structure of the medicine package will be described. As shown in FIGS. 1, 4, and 5, the medicine package 1 contains contents such as tablets in a large number of molding recesses 3 provided in a synthetic resin sheet 2. 4 is housed, an aluminum packaging material film 5 is heat-sealed on the sheet 2 so as to close the molding concave portion 3, and the aluminum packaging material film 5 is divided into separate pieces by a separation line 6 such as perforations or slits. ing. Then, on the entire surface of the aluminum packaging film 5 excluding the storage portion of the contents 4, by the sealing roller used at the time of heat-bonding sealing,
A mesh-shaped heat-bonding seal groove 7 having a predetermined depth is formed.

Further, in the manufacturing process, the medicine package 1 is formed in such a manner that a plurality of sheets are lined up in the width direction and continuously connected in the longitudinal direction as shown in FIG. After the device detects defective heat-sealing, the continuous sheet-shaped medicine package 1 is cut sheet by sheet.

Therefore, the seal defect detecting device for detecting the seal defect of the medicine package 1 will be described. As shown in FIG. 1, the continuous seal medicine package 1 has an aluminum packaging material film 5 face up. It is placed on a conveyor 11 such as a conveyor belt and is moved in one direction at a predetermined speed by the operation of the conveyor 11. A light transmitting device 12 including a laser head is a carrier 11.
The aluminum packaging material film 5 surface of the medicine package 1 is irradiated with light, such as laser light, from the translucent device 12 so as to face the above and above it.

Further, as shown in FIG. 3, in the continuous sheet-shaped medicine package 1, since the sealing defect 13 occurs continuously for a predetermined length in the width direction, the irradiation 14 of the light from the projector 12 is wide. It is designed to extend over a predetermined width along the seal center line 15 between the medicine packages 1 arranged in the direction.

An opaque translucent screen 16 made of a ground glass plate or a cloudy synthetic resin plate is disposed at a predetermined distance from the surface of the aluminum packaging material film 5 with the smoke surface facing down. Light reflected from the screen 16 is incident on the screen 16, and the light is diffused on the screen 16 to produce light and dark on the screen 16. And
When the heat-sealing of the aluminum packaging material film 5 is normally performed, a mesh-shaped heat-sealing seal groove 7 having a predetermined depth is formed on the surface thereof, and as shown in FIG. Since the diffuse reflection occurs in the seal groove 7, the amount of light incident on the screen 16 decreases, and when the thermal adhesive seal has a defect, the seal groove 7 having a predetermined depth is not formed and the diffuse reflection does not occur. The amount of light incident on 16 increases. An edge frame member 16a made of rubber or synthetic resin is fitted around the outer periphery of the screen 16.

Further, the farther the screen 16 is from the surface of the aluminum packaging film 5, the weaker it is against the change of the optical axis reflected from the surface, and the smaller the area of the screen 16 is,
Sensitive to changes in the reflected optical axis. Therefore, even if undulations are present on the surface of the aluminum packaging material film 5 and the optical axis of the reflected light becomes unstable, the position and area of the screen 16 are set so that the optical axis angle does not deviate from the screen 16. Has been done.

A light receiver 17 including a television camera or the like using a line sensor or an area sensor is disposed above the screen 16, captures light and dark on the screen 16 through a lens 18 at the lower end, and captures the image as an electrical signal. Convert to.
As shown in FIG. 2, a central processing unit (CPU) 19 as a discriminating means inputs a video electric signal from a light receiver 17 and compares the video electric signal with a reference electric value corresponding to a preset reference light amount. Then, when the light amount is less than or equal to the predetermined value, it is determined as a normal seal, and when the light amount exceeds the predetermined value, it is determined as a defective seal.

The display device 20 such as a lamp is used by the CPU 19 when a defective seal is detected.
It is activated by the output signal from the device and notifies the detection state of the defective seal. The take-out device 21 uses the CPU 19 when a defective seal is detected.
The medicine package 1 in which a defective seal is generated is cut out from the continuous sheet state by being operated by the output signal from and is taken out from the normal line.

Next, the operation of the medicine package seal defect detecting device configured as described above will be described.

Now, in this seal defect detecting device, while the continuous sheet-shaped medicine package 1 is transferred in one direction by the carrier 11,
Light is emitted from the light projector 12 to the surface of the aluminum packaging material film 5 of the medicine package 1 to detect the defect of the heat-adhesive seal.
At this time, when the heat-sealing of the aluminum packaging material film 5 is normally performed, a mesh-shaped heat-sealing seal groove 7 having a predetermined depth is formed on the surface thereof.
As shown in the figure, since diffused reflection occurs in the seal groove 7, the amount of light incident on the screen 16 decreases. Therefore, the amount of light incident on the light receiver 17 from the screen 16 becomes less than or equal to a predetermined value, and the CPU 19 determines that the seal is normally performed.

On the other hand, as shown in FIG. 3, when the sealing defect 13 occurs on the surface of the aluminum packaging material film 5,
Since the seal groove 7 having a predetermined depth is not formed and irregular reflection does not occur, the amount of light incident on the screen 16 increases. Therefore, the amount of light incident on the light receiver 17 from the screen 16 exceeds a predetermined value, and the CPU 19 determines that a seal defect has occurred. Then, the output signal from the CPU 19 activates the display device 20 to notify the seal defect, and the take-out device 21 is activated to take out the medicine package 1 having the seal defect from the normal line.

As described above, in the drug package sealing failure detection apparatus of this embodiment, the amount of light reflected from the surface of the film 5 is taken into consideration in consideration of diffused reflection at the heat-bonding seal groove 7 formed on the surface of the aluminum packaging material film 5. Is less than or equal to a predetermined value, it is determined as a normal seal, and when the reflected light amount exceeds a predetermined value, it is determined as a defective seal. Therefore, the amount of light reflected from the surface of the aluminum packaging material film 5 of the medicine package 1 can be discriminated based on the regular reference, and the defective seal can be accurately detected.

Further, in the seal defect detecting device of this embodiment, the reflected light from the surface of the aluminum packaging material film 5 is reflected by the screen 16.
The light is once received and is diffused on the screen 16 to produce light and dark on the screen 16, so that fine changes in the reflected light are averaged and corrected to be guided to the light receiver 17. Therefore, the aluminum packaging film 5
Even if undulations exist on the surface and the optical axis of the reflected light becomes unstable, it is possible to reliably detect even a small seal defect.

Note that the present invention is not limited to the configuration of the above-described embodiment, for example, adopting other configurations as the projector 12, the screen 16 and the light receiver 17, etc. within a range not departing from the spirit of the present invention. It is also possible to arbitrarily change the configuration and embody it.

[Advantages of the Invention] Since the present invention is configured as described above,
The amount of light reflected from the aluminum packaging material film surface of the medicine package,
It is possible to accurately detect a seal defect by making a determination based on a regular standard, and even if the optical axis of the reflected light is unstable due to the presence of undulations on the aluminum packaging film surface, a seal defect can be detected. It has an excellent effect that even small details can be detected with certainty.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a seal defect detecting device for a medicine package embodying the present invention, FIG. 2 is a block diagram showing a control circuit thereof, and FIG. 3 is a seal defect detecting operation. 4 is a partial plan view of a continuous sheet-like medicine package for
The top view which expands and shows the medicine package of a sheet | seat, FIG. 5 is the partial cross section which expands and shows the heat-bonding sealing part of a medicine package. 1 ... Medicine package, 2 ... Synthetic resin sheet, 3 ... Molded recess,
4 ... Contents, 5 ... Aluminum packaging film, 12 ...
… Emitter, 16 …… Screen, 17 …… Receiver, 19 …… CPU as discrimination means.

Claims (2)

[Claims] 1. A synthetic resin sheet (2) containing a content (4) such as a tablet in a molding recess (3), and an aluminum packaging material on the sheet (2) so as to close the recess (3). A method for detecting a seal defect of a medicine package (1) obtained by heat-sealing a film (5), which comprises irradiating an aluminum packaging material film (5) surface of the medicine package (1) with light to form the film (5). A method for detecting a seal defect of a medicine package, which comprises detecting light reflected from a surface, discriminating a normal seal when the detected light amount is below a predetermined value, and discriminating a defective seal when the light amount exceeds a predetermined value. 2. A synthetic resin sheet (2) containing a content (4) such as a tablet in a molding recess (3), and an aluminum envelope on the sheet (2) so as to close the molding recess (3). A seal defect detecting device for a medicine package (1) obtained by heat-sealing a material film (5), comprising: a floodlight (12) for irradiating the surface of the aluminum packaging material film (5) of the medicine package (1) with light. An opaque translucent screen (16) that receives light reflected from the surface of the aluminum packaging material film (5), and a light receiver (17) that receives light from the screen (16) and converts the amount of light into an electric signal. And comparing the electric signal from the light receiver (17) with a preset reference value, and when the light quantity is less than a predetermined value, it is judged as a normal seal, and when the light quantity exceeds the predetermined value, it is judged as a defective seal. (19) and that the Seal failure detecting apparatus of cartridges to.