JP2002039729A - Method and device for stamping inspection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device which can securely and easily decide whether or not stamping is normally carried out. SOLUTION: Foil having been stamped is irradiated with light and photographed by a camera, the area of a part punched out by the stamping is measured, and it is decided whether or not the area is within a specific range to inspect whether or not the sampling is done normally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a method for judging whether or not the transfer of an arbitrary pattern is normally performed when a desired pattern is transferred to a blank plate of a carton with a gold foil or a silver foil. Method and apparatus.

[0002]

2. Description of the Related Art It is well known that an arbitrary pattern is transferred onto a blank plate of a carton by using a foil such as gold or silver to enhance the design. That is, a strip of printed material (hereinafter, referred to as a book) on which a plurality of blank plates of a carton are printed is overlapped with a band of foil such as gold or silver fed from an original foil roll, and heated by a gold plate from above. A technique of transferring a foil by applying pressure (hereinafter, referred to as a foil pressing) has been well known.

[0003]

However, conventionally, it was only visually checked by hand to determine whether or not the transfer of the foil was performed normally. For this reason, it is not possible to make a reliable determination, and the work of checking all the printed sheets that are being foil-fed and conveyed one by one is very complicated and troublesome. Therefore, an object of the present invention is to provide a method and an apparatus that can reliably and easily determine whether or not foil pressing has been performed normally.

[0004]

In order to achieve the above object, the present invention first provides the following foil stamping inspection method. That is, light is applied to the remaining foil after the foil pressing, captured by a camera, the area of the part that has been dropped by the foil pressing is measured, and it is determined whether or not the area is within a predetermined range. It is a foil stamping inspection method characterized by inspecting whether or not the inspection has been performed. And the following foil stamp inspection apparatus is provided. That is, a light source that shines light on the remaining foil after the foil pressing, a camera that captures the remaining foil that has been illuminated, a measuring unit that measures the area of the portion that has been foiled and dropped, and a value that is within a predetermined range. And a determination unit for determining whether or not the stamping is performed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below based on examples shown in the drawings. FIG. 1 is a schematic diagram showing the entire stamping step, and FIG. 2 is a schematic explanatory view showing a stamping inspection apparatus according to the present invention. FIG. 3 is an explanatory view showing the remaining foil when the foil is normally pressed and the remaining foil when the foil is not normally pressed. It should be noted that the present invention is not limited to the illustrated embodiment, and that the design can be appropriately changed within the spirit of the present invention.

As shown in FIG. 1, a book (1) on which a plurality of blank plates of a carton are printed is supplied from a feeder (2) to a foil stamping step. (3) is a gripper bar for transporting the printing book (1) supplied from the feeder (2) to the foil pressing step, and a plurality of the gripper bars (3) are attached to the circulation belt (4). (5) is a foil stamping device, which superimposes a strip-shaped foil (8) fed from an original foil roll (7) on a printing book (1) conveyed at a predetermined pitch and at a predetermined pitch. While feeding the foil (8), the foil (8) is pressed to a predetermined position on a plurality of blank plates printed on the book (1). The printed book (1) after the foil stamping is stored in the delivery (6), and the remaining foil (9) after the foil stamping is transferred to the foil stamping inspection device (10) to check whether the foil stamping has been performed normally. Is determined.

[0007] A plurality of foil stamping inspection devices (10) are provided in the direction perpendicular to the paper surface of FIG. 1, and as shown in FIG. The backlight (11) that irradiates light from above (or from above) and the remaining foil (9) of the illuminated portion from above (or from below)
A camera (12) for capturing, a measuring unit (13) for measuring an area of a portion of the remaining foil (9) which has been captured by the camera (12), and a value in which the measured area is within a predetermined range, preferably an error 10 And a determining unit (14) for determining whether the value is less than%. When there is a foil pressing failure as shown in FIG. 3, the entire apparatus in the foil pressing step is configured to be stopped, and after the apparatus is stopped, the printing book (1) stored in the delivery (6) is stopped. From inside, the printing book (1) having the foil pressing failure is manually extracted.

That is, from the time when the remaining foil (9) moves from the foil stamping device (5) to the foil stamping inspection device (10), the time until the stamped book (1) is stored in the delivery (6). Since the time is shorter, the foil stamping defect (1)
When the detection is made in (0), the printing press (1) having the defective foil pressing is already stored in the delivery (6). Therefore, a predetermined number of printing presses including the printing press (1) having the defective foil pressing are provided. (1) is to be extracted and examined.
In other words, in the past, it was necessary to check all the printed books (1) that had been pressed and conveyed,
According to the present invention, it is sufficient to extract and examine only a predetermined number of sheets after the apparatus is stopped after a foil pressing failure is found,
Effort is greatly reduced.

[0009] For example, while the remaining foil (9) moves from the foil stamping device (5) to the foil stamping inspection device (10), 50 prints (1) are stored in the delivery (6). If it is set, after the device is stopped, only 50 sheets of the printing book (1) stored in the delivery (6) need to be extracted from the top and visually checked by hand, and if no foil pressing defect is found, Since there is no need for manual confirmation, labor is greatly reduced. Although FIG. 2B shows that only one pattern can be detected in the camera field of view (W), a plurality of patterns can be detected simultaneously depending on the setting, such as changing the arrangement height of the camera (12). Becomes possible. Also,
If the moving distance of the remaining foil (9) from the foil stamping device (5) to the foil stamping inspection device (10) is reduced, the number of printing books (1) to be removed after the device is stopped can be reduced.

[0010]

In any case, according to the present invention,
Light is applied to the remaining foil after foil pressing and captured by a camera, the area of the part that has been dropped by foil pressing is measured, and it is determined whether or not the area is within a predetermined range. Since the inspection is performed, it is not necessary to manually check all of the images one by one as in the related art, and the labor is extremely reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the entire foil stamping process.

FIG. 2 is a schematic explanatory view showing a foil stamping inspection apparatus according to the present invention.

FIG. 3 is an explanatory view showing a remaining foil that has been normally pressed and a remaining foil that has not been normally pressed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed book 2 Feeder 3 Gripper bar 4 Circulation belt 5 Foil stamping device 6 Delivery 7 Original foil roll 8 Foil 9 Remaining foil 10 Foil stamping inspection device 11 Backlight 12 Camera 13 Measurement unit 14 Judgment unit

Claims (2)

[Claims] 1. A method of irradiating light on the remaining foil after the foil pressing, capturing the remaining foil with a camera, measuring the area of a part that has been foiled and dropped out,
A foil stamping inspection method comprising: determining whether the area is within a predetermined range; and inspecting whether foil stamping has been performed reliably. 2. A light source that shines light on the remaining foil after the foil pressing, a camera that captures the remaining foil on which the light is applied, a measuring unit that measures an area of a part that has fallen off by the foil pressing, and the area is within a predetermined range. And a judging unit for judging whether or not the value is within the range.