JPS62163950A - Method and apparatus for detecting defective thermally adhered seal of ptp packed body - Google Patents

Abstract

PURPOSE:To enable automatic detection of a defective thermally adhered sealing of a PTP packed body, by projecting a light to an aluminum-wrapped film surface to decide on acceptance or rejection depending on increase or decrease in the quantity of reflected light. CONSTITUTION:A light is made to irradiate a sensor view band (c) at a thermally sealed part between an aluminum-wrapped film 4 and a synthetic resin sheet 1 of a PTP packed body from a projector 7. The light reflected from the sensor view band (c) is caught with a light receiving section 8 and converted into an electrical signal, which is applied to an acceptance/rejection decision circuit via an amplifier 9. The acceptance/rejection decision circuit compares a signal by the reflected light from the aluminum-wrapped film with a preset fixed reference signal to judge the acceptance or rejection.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention accommodates contents such as tablets and capsules in the molded recesses of a 9-synthetic resin sheet, and thermally seals the contents with an aluminum packaging film from above. Become. The present invention relates to a method and apparatus for detecting thermal adhesive seal failure of an aluminum packaging film in a so-called PTP package.

(Prior art) Traditionally, it has been used as a packaging material for drugs such as tablets and capsules.
PTP packaging is widely used, and it is an important inspection item from the viewpoint of drug safety to determine whether the aluminum packaging film, which is a conductor, is completely thermally sealed to the synthetic resin sheet that forms the storage recess. However, these inspections and removals are performed manually, such as by visual inspection, and there are problems such as inspection errors and non-uniformity of inspection standards, so automation of inspection has been desired for a long time.

(Means for Solving the Problems) Therefore, the technical problems of the present invention are as follows: A method for automatically detecting poor thermal adhesion of a PTP package.

The technical means of the present invention, which aims to obtain a device and solves this technical problem, is as follows.

That is, in a PTP package in which contents are stored in a molded recess of a synthetic resin sheet and an aluminum packaging film is thermally adhesively sealed from the upper part of the PTP package, a defect in the thermal adhesive sealing of the aluminum packaging film is detected. Light is projected onto the aluminum packaging film surface of the PTP packaging body,
A method for detecting defects in thermal adhesive seals for PTP packaging, characterized in that light reflected from the aluminum packaging film is detected and whether the light is good or bad is determined based on an increase or decrease in the amount of light, the method comprising: The following equipment is used directly for carrying out the invention.

2. A floodlight that irradiates light onto the aluminum packaging film surface of the PTP package which stores the contents in the molded recesses of the synthetic resin sheet and heat-adhesively seals the aluminum packaging film from above, and the aluminum packaging film. A light-receiving unit that receives reflected light reflected from a surface and converts the received light amount into an electrical signal, and when the electrical signal is smaller than a preset non-defective standard value. A PTP characterized by being provided with a determination circuit that determines that it is defective and an output means that outputs the determination result.
This is a device for detecting defects in thermal adhesive seals on packages.

(Effects of the invention) According to this technical means, it is possible to automatically detect a defective thermal adhesive seal on a PTP package, and moreover, in the case of a defective product, there is no film on the sheets that precede and follow the defective sheet. Wrinkles and the like often occur, but all such defective products can be completely detected and removed, and the means of the present invention can be installed during the process of filling and packaging 9 tablets or capsules into PTP packaging bodies. - It has the effect of being able to automatically detect the flow of the looped line without changing it.

(Example) The following description will be made based on embodiments shown in nine drawings.

First, the contents (3) such as tablets and capsules are placed in the molded recess (2) of the PTP package (al is a synthetic resin sheet (1)).
The aluminum wrapping film (4) is heat-polymerized and adhered from the back side as a storage film, and each single package (5
) and (5) are separably divided by dividing means (6) such as perforations or slits.

When this PTP package (a) is manufactured, it is rolled into a continuous synthetic resin sheet (1
) is formed with a concave part (2), and the content hole for two tablets etc. is formed in the concave part (2).
), and a continuous aluminum packaging film (4) that is also rolled into a roll is heat-adhesively sealed on top of it, but in this case, the PTP packaging (a) is.

A plurality of sheets, for example four sheets, are arranged in a row in a row (this is referred to as one shot (b)), and are arranged in an endless row in a row for packaging. This continuous connected package is first cut into four sheets each in a column and then one sheet at a time. Before cutting, in the continuously connected sheet state, the thermally bonded parts of the aluminum packaging film (4) and the synthetic resin sheet (1) are formed into horizontal strips for the sensor viewing zone (
C1, and the sensor field of view (C1 is 1 shot (b)
Of these, each PTP package (al) is provided in one place in a strip in the row direction, and the projector (7
).

The reflected light reflected from the sensor field of view (g) is captured by the light receiving section (8), converted into an electrical signal, and the electrical signal is applied to the pass/fail judgment circuit α■ via the amplifier (9). do.

The pass/fail judgment circuit (10) compares a predetermined constant reference signal (e) with a signal generated by the reflected light from the aluminum packaging film to judge pass/fail.The judgment mechanism will be explained with reference to Figs. 2 and 3. Then.

The principle is to detect the increase or decrease in the amount of light reflected on the aluminum packaging film surface using a light receiving unit to determine whether it is good or bad. 3 shows the state of reflection of the projected light of the PTP package, respectively. In FIG.

In the case of the normal product (2), the surface of the sealed aluminum packaging film is flat, so most of the projected light is reflected and sensed by the light receiving section, and when this is converted into an electrical signal and measured, a certain reference signal is generated. (The signal exceeds D. On the other hand,
In the case of a defective seal, the seal on the aluminum packaging film is incomplete, resulting in wrinkles on the aluminum packaging film surface.

As a result, irregularities are formed due to twisting, and therefore, as shown at @, diffuse reflection occurs on the surface of the aluminum packaging film, reducing the amount of light incident on the light receiving section.

Therefore, the electrical signal will be lower than the constant reference signal (a).

It is determined to be defective.

If an incomplete seal is formed, the sheets before and after the seal will be affected and wrinkles will occur, but if the method of the present invention is used, the effects of wrinkles will disappear and the seal will be completely sealed (shot (b)) Since the product is not determined to be good until it reaches , defective products can be completely excluded.

Note that the output from the pass/fail judgment circuit (1) is output from the delay circuit (1
After passing through 11 passes, tying control is performed, and after being cut and separated into individual PTP packages (al), the defective product jumping mechanism αJ is driven by the output circuit ball to remove only the defective PTP packages.

2 is a display circuit, which is connected to the delay circuit 01) or the pass/fail judgment circuit (10) when a means for indicating by means of a lamp or the like is provided when a defective product occurs.

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

A film laminated with synthetic resin film, etc.

Alternatively, a synthetic resin film, glassine paper, or other paper material film with aluminum vapor-deposited may be used, and a sensor viewing zone (C1 has an aluminum bar, which reflects light) is provided on the surface of the aluminum packaging film. It is preferable to have a property of high efficiency.

If a seal failure occurs in one place on the PTP package, the surface of the aluminum packaging film will lift and wrinkle, and the unevenness will affect other parts, so the entire surface of the aluminum packaging film must be detected. It is not necessary to do so (a belt-shaped 1 extending from one end of the PTP package other than the molded recess to the other end)
Therefore, the setting site of the sensor field of view (C) is the one-sheet PTP package (a).
It is sufficient to provide one or more force points extending from one end to the other end along the flow direction of the packaging process line, as shown in FIG. 8.

It can be designed to extend from one end to the other. In terms of 1 shot Nb), the sensor viewing zone (
c'l (If c'l is provided, sufficient detection is possible.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the apparatus of the present invention. FIG. 2 is an enlarged side view of the projector and the light receiving section showing a state in which seal failure is detected. FIG. 3 is an explanatory diagram showing the waveform of an electric signal sensed by the light receiving section. FIG. 4 is a schematic diagram showing the process flow in which the apparatus of the present invention is installed in the process of filling contents into a PTP package. FIG. 5 is a plan view showing one shot of the PTP package. FIG. 6 is a perspective view of the PTP package (a). FIG. 7 is a sectional view taken along line xx'. Figure 8 shows an example of setting the sensor field of view FC+.
It is a top view of a P package. ■1 Synthetic resin sheet 2 Molding recess 3 Contents 4 Aluminum packaging film 5 Single package 6 Dividing means 7 Emitter 8 Light receiving section 9 Amplifier 10 Acceptance/failure judgment circuit 11 Delay circuit 12 Display circuit 13 Output circuit 14 Defective product jumping mechanism a PTP package b 1 shot C sensor viewing zone

Claims (1)

[Claims] 1. In a PTP package in which the contents are stored in a molded recess of a synthetic resin sheet and an aluminum packaging film is heat-bonded from above, a failure in the heat-bonding seal of the aluminum packaging film is detected. The PTP
A PTP packaging body characterized by projecting light onto the aluminum packaging film surface of the packaging body, detecting the light reflected from the aluminum packaging film surface, and determining whether it is good or bad based on an increase or decrease in the amount of light. Heat-adhesive seal defect detection method 2: The content is stored in the molded recess of the synthetic resin sheet, and the aluminum packaging film surface of the PTP package, in which the aluminum packaging film is heat-adhesively sealed from above, is irradiated with light. A light projector, a light receiving unit that receives the reflected light reflected from the aluminum packaging film surface and converts the received light amount into an electrical signal, and a light receiving unit that receives the reflected light from the aluminum packaging film surface and converts the received light amount into an electrical signal. A thermal adhesive seal failure detection device for a PTP package, characterized in that it is equipped with a determination circuit that determines it to be defective when the value is smaller than a certain standard value for a non-defective item, and an output means that outputs the determination result.