JPH065214B2 - Method and apparatus for detecting thermal adhesive seal failure of PTP package - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention allows contents such as tablets and capsules to be housed in a molding recess of a synthetic resin sheet, and heat-sealed with an aluminum packaging film from above. The present invention relates to a method and a device for detecting a thermal adhesive seal defect of an aluminum packaging material film in a so-called PTP package.

(Prior art and its problems) Conventionally, as a packaging body for drugs such as tablets and capsules,
PTP packaging is widely used, and whether or not the aluminum packaging material film as the lid is completely heat-sealed to the synthetic resin sheet with the accommodating recess is an important inspection item from the viewpoint of drug safety. However, these inspections and removals are performed manually by visual inspection, and there are problems such as inspection errors and nonuniform inspection standards, and automation of inspection has been conventionally desired.

(Means for Solving the Problem) Therefore, the technical problem of the present invention is to obtain a method and an apparatus for automatically detecting a heat-bonding failure seal of a PTP package, and to solve the technical problem. The technical means of the present invention for solving is as follows.

That is, by a method of detecting the heat-bonding failure of the aluminum packaging film in the PTP package in which the contents are stored in the molding recess of the synthetic resin sheet and the aluminum packaging film is heat-bonded and flattened from the upper portion thereof. Therefore, light is projected onto the aluminum packaging film surface of the PTP package, the light reflected from the aluminum packaging film surface is detected, and when the amount of light exceeds a certain standard, it is judged as good, and a certain standard is determined. It is a method for detecting a defective heat-adhesive seal of a PTP package, which is characterized in that it is determined to be defective when the value does not exceed.

The following device is used as a direct detection device for carrying out the invention of this method.

That is, the contents are stored in the molding recess of the synthetic resin sheet, and the light is applied to the aluminum packaging film surface of the PTP packaging body in which the aluminum packaging film is heat-sealed flatly from the upper part thereof, A light receiving portion that receives the reflected light reflected from the surface of the aluminum packaging material film and converts the received light amount into an electrical signal, and judges that the electrical signal is good when the electrical signal exceeds a preset reference value, A thermal bonding seal defect detection device for a PTP package, comprising a determination circuit for determining a defect when a certain standard is not exceeded, and output means for outputting the determination result.

(Operation) According to the present invention, the increase or decrease in the amount of light reflected on the surface of the aluminum packaging material film is sensed by the light-receiving portion, and the light-receiving amount is compared with a reference value to determine whether the thermal adhesive seal is good or bad. .

When the thermal adhesive seal is good, no wrinkles are formed on the surface of the aluminum wrapping material film, so the light projected from the projector onto the film surface is reflected at a uniform reflection angle and almost all of it is received by the light receiving part. When it is sensed and sensed, and it is converted into an electric signal and measured, it becomes a signal exceeding a certain reference signal (1) and is judged to be good.

On the other hand, when the heat-bonding seal is defective, the aluminum packaging film is not completely sealed and wrinkles occur on the surface of the aluminum packaging film, or the film is twisted to form irregularities on the surface. Therefore, the light projected from the projector is irregularly reflected on the surface of the aluminum packaging material film, and the light is scattered and the amount of light entering the light receiving portion is reduced. Therefore, the electric signal becomes lower than the constant reference signal (1), and it is judged as defective.

(Example) Hereinafter, an example will be described with reference to the drawings.

First, in a PTP package (a), contents (3) such as tablets and capsules are stored in a molding recess (2) of a synthetic resin (1), and a flat aluminum film (4) is formed from the back surface as a lid film. ) Is heat-polymerized and bonded, and each single package (5) is separably divided by a dividing means (6) such as a perforation line or a slit, and this PTP package (a) is manufactured. At the time, as shown in FIG. 4, a continuous synthetic resin sheet (1) is wound into a roll.
A concave part (2) is formed in the concave part (2), the contents (A) such as tablets are filled in the concave part (2), and the aluminum packaging material film (4) continuously wound by being rolled in the same manner is heated flatly. Adhesively sealed, but in this case, PTP package (a)
Are packaged in such a manner that a plurality of sheets, for example, 4 sheets are continuously provided in a column (this is referred to as 1 shot (b)) and endlessly in a row. The continuously connected packages are first cut into four sheets and then one sheet. In the continuous connected sheet state before cutting, the heat-bonded portion of the aluminum packaging material film (4) and the synthetic resin sheet (1) is formed into a horizontal strip-shaped sensor visual field (c). ) Is provided so as to correspond to one PTP package (a) of one shot (b) in a strip shape in the row direction, and the light is emitted from the projector (7). Reflected light reflected from the sensor visual field tail (c) is promoted by the light receiving part (8), converted into an electric signal, and the electric signal is passed to the pass / fail judgment circuit (10) via the amplifier (9). Add Pass / fail judgment circuit (10)
Then, compare the predetermined constant reference signal (1) with the signal due to the reflected light from the surface of the aluminum packaging material film,
Judge pass / fail. The determination mechanism will be described with reference to FIGS. 2 to 3. The principle is that the light receiving unit senses an increase or decrease in the amount of light reflected from the surface of the aluminum packaging material film and determines whether the light is good or bad. In the figure, "a" is a normal PTP package, "b" is a defective PTP package, and the reflection state of the projected light of each is shown. Fig. 3 (c) is the waveform of the electrical signal in the case of (a), and d is the electrical signal of b Shows the waveform of.

In the case of a normal product, the surface of the sealed aluminum wrapping material film is flat, so the projected light is reflected and almost all of it is received by the light receiving part and is sensed, and this is converted into an electrical signal for measurement. Then, the signal exceeds the constant reference signal (1). On the other hand, in the case of a defective seal, the sealing of the aluminum packaging material film is incomplete, so that the surface of the aluminum packaging material film becomes wrinkled or twisted to form irregularities. Diffuse reflection occurs on the surface of the packaging material film, and the amount of light entering the light receiving part decreases. Therefore, the electric signal becomes lower than the constant reference signal (1), and it is judged as defective.

If the sheet is partially incompletely sealed, the sheets before and after the sheet will be affected and wrinkles will occur. However, the method of the present invention eliminates the effects of wrinkles and gives a completely sealed shot (b). Until it arrives, the quality is not judged, so defective products can be completely excluded.

The output from the pass / fail judgment circuit (10) is timing-controlled through the delay circuit (11), cut and cut into individual PTP packages (a), and then the output circuit (13) jumps out defective products. The mechanism (14) is driven to remove only the defective PTP package.

Reference numeral (12) is a display circuit, which is provided with a delay circuit (1 when a means for displaying a defective product by a lamp or the like is provided.
1) or a quality decision circuit (10).

The light receiving unit (8) has means for receiving the reflected light from the surface of the aluminum packaging material film and converting the amount of the light into an electric signal, and for example, a line sensor or a TV camera is used.

The aluminum packaging material film (4) is a lid material film containing aluminum as a component, and is a film obtained by laminating a synthetic resin film or the like on aluminum foil, or a film obtained by vapor deposition of aluminum on a synthetic resin film, glassine paper, or other paper material. It is preferable that the sensor field zone (c) provided on the surface of the aluminum packaging material film has the properties of aluminum gloss and high light reflectance.

If a sealing failure occurs at any one place in the PTP package, the aluminum packaging film surface floats and wrinkles occur, and the unevenness affects other parts as well, so the entire aluminum packaging film surface is detected. There is no need to do this, and a strip-shaped 1 from one end to multiple ends other than the molding recess of the PTP package.
It suffices to inspect the part, and therefore, the setting part of the sensor visual field zone (c) is the one-sheet PTP package (a),
Since it is sufficient to provide one or more places extending from one end to the other end along the flow direction of the process line of the package, it is possible to design the portion extending from the various end to the other end as shown in FIG. . In terms of one shot (b), as shown in FIG. 5, if the sensor visual field zones (c ′) and (c ′) are provided at the ends of any of the four sheets, the detection can be sufficiently performed.

(Advantageous Effects of the Invention) According to this technical means, a defective heat-adhesive seal of the PTP package can be automatically detected, and a defective product can be a wrinkle on the film following the defective sheet. In many cases, all of these defective products can be detected and removed.
The means of the present invention can be provided during the process of filling and packaging the tablets or capsules with the PTP package, and has an effect that it can be automatically detected without changing the integrated flow of the line.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the device of the present invention. FIG. 2 is an enlarged side view of the projector and the light receiving section showing a state in which a seal defect is detected. FIG. 3 is an explanatory diagram showing a waveform of an electric signal detected by the light receiver. FIG. 4 is a schematic diagram showing the flow of steps in which the device of the present invention is installed in the step of filling the contents in the PTP package. FIG. 5 is a plan view showing one shot of the PTP package. FIG. 6 is a perspective view of a PTP package (a). FIG. 7 is a sectional view taken along line XX ′. FIG. 8 shows a PT showing a setting example of the sensor visual field portion (c).
It is a top view of a P package. DESCRIPTION OF SYMBOLS 1 Synthetic resin sheet 2 Molding recessed part 3 Content 4 Aluminum packaging film 5 Single package 6 Dividing means 7 Light emitting part 8 Light receiving part 9 Amplifier 10 Pass / fail judgment circuit 11 Delay circuit 12 Output circuit 13 Output circuit 14 Defective product jumping mechanism a PTP package b 1 shot c Sensor field of view

Claims (2)

[Claims] 1. A PTP package in which the contents are housed in a molding recess of a synthetic resin sheet, and the aluminum packaging film is heat-sealed flatly from the upper portion thereof, to detect a defective heat-sealing of the aluminum packaging film. The method for illuminating the aluminum packaging material film surface of the PTP package, detecting the light reflected from the aluminum packaging material film surface, and determining that the light quantity is good when the light quantity exceeds a certain standard. A method for detecting a defective heat-adhesive seal of a PTP package, which is characterized in that a defect is determined when a certain standard is not exceeded. 2. A projector for irradiating light to the aluminum packaging film surface of a PTP packaging body in which the contents are housed in a molding recess of a synthetic resin sheet, and an aluminum packaging film is heat-sealed flat from above. And a light-receiving part for receiving the reflected light reflected from the surface of the aluminum packaging material film and converting the received light quantity into an electric signal, and when the electric signal exceeds a preset reference value, it is judged as good. An apparatus for detecting a defective heat-adhesive seal of a PTP package, comprising: a determination circuit that determines a defect when it does not exceed a certain standard and an output unit that outputs the determination result.