JPH01121200A - Defective punching inspection device - Google Patents

Abstract

PURPOSE: To accurately detect punching as well as punched lappet by installing at least one sensor in the direction vertical and at least one sensor in the direction horizontal to a sheet. CONSTITUTION: When a vertical direction sensor 4 is not turned off even one time between timing signals, a package material sheet 1 punching fault (not bored) signal is output from a comparator part and a judgment part in a punching inspection circuit 7. Next, the lower side of the package material 1 is always monitored by two lateral sensors 2 and 3 and, if the lateral sensors 2 and 3 arranged at positions crossed at right angle to each other are turned off even one time, a punched lappet fault signal is output from a comparator part and a judgment part in a punched lappet inspection circuit 8. When a faulty pouching or a faulty punched lappet is detected like this, a rotating beacon 10 and a buzzer 11 are operated by the signal.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a punching defect inspection device for punching out a desired shape pattern from a roll sheet to obtain a packaging material.

<Prior art and problems> Conventionally, when punching out a desired pattern from one roll sheet to obtain packaging material for paper cups, etc., it has been found that, even if the sheet is not punched or has been punched, the punched waste remains in the packaging material. Defects such as particles remaining attached to the surface were occurring. Regarding the above-mentioned problem, inspections were performed visually by humans, but sometimes things were overlooked due to misunderstandings, misunderstandings, or because it was difficult to distinguish even by visual inspection, resulting in a loss of customer trust. It happened very rarely.

In addition, in order to automatically perform such inspections, a system is used in which a light transmission type sensor is installed vertically and detects punching defects based on whether light is transmitted or not. According to the system, as shown in FIG. 2a, it is possible to detect a punching defect in which the punched area is not punched at all, but as shown in FIG. Such a system could not detect sagging defects caused by the patterned material 13. In other words, if a sensor is used only in the vertical direction, light will pass through even if there is a sagging defect, and the product will be judged as good.

<Means for solving the problem> The present invention has been made in view of the above-mentioned current situation, and when punching out a package with a desired pattern from a sheet,
In a punching defect inspection device that detects whether punching has been performed accurately using a sensor and determines it using a device consisting of a comparing section, a determining section, an abnormality output section, etc. Another object of the present invention is to provide a punching defect inspection device, which is provided at least one in a direction horizontal to the sheet, and is capable of inspecting not only punching but also sag.

<Example> The present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing the entire apparatus of the present invention.

The two sensors, lateral sensor 2 and lateral sensor 3, are transmissive sensors that are turned on when light is passing through and turned off when light is blocked, and the vertical sensor (4) is turned on when light is passing through and turned off when light is blocked. This is a reflective sensor that turns off.

First, the timing detection sensor 6 monitors the shaft 5, which rotates once per cycle, and extracts a signal synchronized with the cycle in which a sheet is punched out from a roll sheet conveyed on a belt conveyor. This timing signal is input to the comparing section 2 determining section in the punching inspection circuit 7. If the punch is correctly punched before the next timing signal comes, the punch hole will come through once, and the vertical direction sensor will also turn off once. (The vertical sensor is in a light-passing state (on) because light is reflected where there are no holes, and in a light-blocking state (on) where there is a hole because no light is reflected.
off). From this, if the vertical direction sensor does not turn off even once during the timing signal, a punching defect (no hole) signal is sent to the comparison section in the punching inspection circuit 7.

It is output by the determination section.

Next, two sensors, lateral direction sensor 2 and lateral direction sensor 3, constantly monitor the lower side of packaging material sheet 2. The lateral sensors 2 and 3 are used to detect when the punching residue has adhered after punching as shown in Fig. 2, resulting in poor punching sag. 2 and 3 are arranged at orthogonal positions. The lateral direction sensor 2 and the sensor 3 are transmission type sensors, and when a drop passes between the sensors, the light-receiving side sensor is turned off due to a light-blocking state. If these two sensors are turned off even once, the comparator 1 determining section in the sag inspection circuit 8 outputs a sag defect signal. As shown in FIG. 2A, a punching defect is when the packaging material is not punched, and as shown in FIG.

Next, the determination circuit 5 determines if there is a punching defect or a punching sagging defect (patry)10. This is output from an alarm output unit such as the buzzer 11.

FIG. 3 shows specific examples of timing signals, vertical sensor signals, and lateral sensor signals. The intervals of the timing signals are sequentially divided into section (a), section (b), section (C), and section (d).
), and section (e), in section (a), the signal of the vertical sensor is blocked once, so the punching signal is off, and the signals of lateral sensors 2 and 3 are always on, so there is no punching. The droop signal is off and normal in this section. In section [Yes]), the signals of the horizontal sensors 2 and 3 are always on, so the punching sag signal is off, but the vertical sensor signal never turns off, so the punching defect signal outputs a defective signal. Therefore, this section becomes defective.

In sections (b), (C), and (d), the punching signal is off, but the signals of the lateral sensors 2 and 3 are off, so
The sag signal outputs a defect, and this section becomes defective. In this way, it has become possible to accurately detect punching defects and punching sagging defects.

<Effects of the Invention> Since the present invention has the above configuration, it has excellent practical effects as shown below. That is, by arranging the sensors three-dimensionally, it has become possible to detect droop with high accuracy.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a block diagram showing the configuration of the present invention. FIG. 2 is an example of a punching defect and a punching sag defect. FIG. 3 is a timing chart. This is an example diagram. 1...Object to be inspected 2...Lateral direction sensor 3...
- Lateral sensor 4... Vertical sensor 5... Shaft 6... Timing detection sensor 7... Punching inspection circuit 8... Punching sagging inspection circuit 9... Judgment circuit 10... Patrol light 11・・・
・Buzzer 12... Sheet 13... Patent application for patterned product Toppan Printing Co., Ltd. Representative Kazuo Suzuki Figure 3

Claims (1)

[Claims] 1) When punching out packages with a desired pattern from a sheet, a sensor detects whether the punching has been performed accurately, and a device comprising a comparison section, a determination section, an abnormality output section, etc. In the punching defect inspection device for determining punching defects, one sensor is provided in a direction perpendicular to the sheet, and at least one sensor is provided in a direction horizontal to the sheet, so that it is possible to inspect punching sag as well as punching. This is a punching defect inspection device that is characterized by: