JP2010149284A - Defective paper state detection apparatus of foil stamping machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detection apparatus which detects the stamping of foil to defective paper by detecting the state of transportation paper sheet, in the apparatus which pastes the foil such as a hologram. <P>SOLUTION: The defective paper state detection apparatus of a foil stamping machine has: a detection sensor illuminating part which detects the defective state of paper; a detection sensor light receiving part which receives light illuminated by the detection sensor illuminating part; an identifying part which identifies the presence or absence of the defective paper state from the presence or absence of the light received by the detection sensor light receiving part; a stopper which stops the foil stamping machine based on an identification result by the identifying part; and a control part which controls operations of parts on an upper surface plate in a foil stamping part for stamping pattern foil such as the hologram to a paper sheet. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a foil stamping machine for attaching labels such as holograms to precious printed matter such as banknotes, and in particular, such as corner bending immediately before foil stamping or simultaneously with foil stamping on a sheet conveyed in the foil stamping machine. This is to detect a missing state.

Usually, a printing machine or a foil stamping machine transfers sheets one by one from a paper feeding unit (feeder). In the case of a printing machine, printing is performed by a printing unit. Sent to the department (delivery). In the present invention, the printing unit of the printing press or the foil stamping unit of the foil stamping machine is referred to as a processing unit as a main function of the apparatus.

Further, the printing machine or the foil stamping machine is equipped with various detectors so that a printed design and a hologram design can be accurately arranged on a sheet (for example, a sheet). For example, detectors such as paper bending, double sheet insertion, and corner breakage are common, and these detectors are provided in the process before being transferred to the processing unit, so-called supply unit, and after the processing unit. It may be provided in the conveyance part of a process.

Specifically, an apparatus for detecting a corner break of a sheet will be described. First, a device that detects a corner break in the supply unit is positioned at a regular position in the front and side of the paper, for example, by the front and horizontal needles of the supply unit. A detection sensor as a detector is arranged slightly above the sheet at the position of the part, that is, at the front left corner position. This detection sensor is composed of a projector that emits light downward and a light receiver that receives reflected light that is reflected from the paper, and an apparatus that determines the corner breakage of the paper based on this detection signal is disclosed. (For example, refer to Patent Document 1).

On the other hand, when a detection sensor is provided in the conveyance unit in the process after the processing unit, for example, in an offset rotary printing apparatus using a web, after printing in the printing unit serving as the processing unit, it is folded in half, in three, or in four. In a device that obtains a printed sheet by continuously folding the sheet into a predetermined shape such as a sheeter and cutting the sheet into sheets by a cutting means such as a sheeter, the four corners of the sheet are An apparatus that inspects a corner break of a sheet by taking an image with a camera and evaluating the image is disclosed (for example, see Patent Document 2).

By the way, in a foil stamping machine, unlike a printing machine or other processing machines, corner breakage may occur in a foil stamping section serving as a processing unit, and it is necessary to detect corner breakage in the foil stamping section.

The reason for this is that, in the foil stamping machine, the sheets are transferred one by one from the paper feeding section to the foil pressing section, where the sheets are gripped by the gripper of the sheet transport mechanism, and hologram design foil, gold foil, silver foil, etc. are used as the sheet. Press the foil. At this time, in the foil pressing unit, the paper is wrinkled and stretched by air from the paper discharge unit immediately before the foil pressing. In some cases, as shown in FIG. 5, the tail edge of the paper (1) flutters by the air. Eventually, it may roll up, and the hologram design foil (2) may be pressed onto the back surface of the paper (1). As described above, there is a problem in that defective foil pressing occurs when the paper is subjected to the wrinkle-stretching process with air from the paper discharge unit immediately before the foil pressing, unless corner breaks at the four corners of the paper are detected. In FIG. 5, since 16 sheets of 4 columns × 4 rows are attached to the paper (1), the hologram design foil (2) is also pressed at 16 locations. Further, the upper right of FIG. 5 shows the defective foil stamping (3) pressed on the back surface of the paper (1) by the corner bend of the paper (1).

However, the detection device and the detection method related to the corner breakage of the paper disclosed up to now have disclosed the technology before and after the processing unit as in the above-described prior invention, but the detection within the processing unit, specifically, No mechanism has been disclosed for detecting corner breaks in the foil stamping section.

JP-A-57-95463 JP 2003-182883 A

The present invention relates to detection of a paper missing state in a foil stamping unit of a foil stamping machine, and can solve the above-described problems. Specifically, a paper missing state detection device is installed in the foil pressing unit to reliably detect a paper missing state such as a corner break when the foil is pressed.

A sheet loss state detection device for a foil stamping machine according to the present invention includes a sheet feeding unit that sequentially feeds stacked sheets, a fixed lower surface plate that performs foil stamping on sheets supplied from the sheet feeding unit, and a lower surface plate An upper surface plate that swings to come into contact with the lower surface plate, a foil pressing portion composed of a temperature control mechanism that heats the lower surface plate and the upper surface plate, and paper that has been pressed by the foil pressing portion In a foil pusher comprising a paper discharge unit for discharging and stacking paper, a paper loss state detection device for detecting a loss state of the paper conveyed to the foil press unit, wherein the paper loss state detection device uses a design foil such as a hologram as the paper At least one detection sensor light projecting unit and a detection sensor light projecting unit paired with any one of the upper surface plates to be foil-foiled, and detecting the light emitted from the detection sensor light projecting unit Sensor receiver and detection A determination unit that determines the presence or absence of a missing state in the paper based on a light reception result of the sensor light reception unit, and a control unit that controls the operation of the detection sensor light projecting unit, the detection sensor light reception unit, and the determination unit. This is a sheet loss state detection device.

Further, the paper missing state detecting device of the foil stamping machine according to the present invention is a paper missing state detecting device using a reflection type photoelectric sensor or a transmission type photoelectric sensor in order to confirm the presence / absence state of paper.

  Further, the sheet loss state detection device for a foil stamping machine according to the present invention is characterized in that a light absorption unit for appropriately absorbing sensor light is provided between the detection sensor light projecting unit and the detection sensor light receiving unit. This is a sheet loss state detection device.

In addition, the paper loss state detection device for a foil stamping machine according to the present invention includes a stop unit that stops the foil stamping machine when the determination result of the determination unit determines that there is a defective sheet. It is a state detection device.

Further, the sheet loss state detection device for a foil stamping machine according to the present invention is provided with an alarm unit for notifying that a missing sheet paper has occurred around the foil stamping machine when the determination result of the determination unit is determined to be missing paper. This is a sheet loss state detection apparatus characterized by the above.

Furthermore, the paper missing state detecting device of the foil stamping machine according to the present invention is a paper missing state detecting device characterized in that a paper presence / absence detecting unit for detecting the presence / absence of paper is attached to the upper surface plate.

Since the paper missing state detecting device of the foil stamping machine of the present invention can reliably detect defects such as corner breakage of the paper in the foil stamping part, defective products can be appropriately excluded. As a result, the outflow of defective products to the next process can be greatly suppressed, so that the quality maintenance can be realized.

In addition, the paper loss state detection device for a foil stamping machine according to the present invention can greatly suppress defective pasting products that have been generated in the past and can improve the operating rate of the device, so that the cost of these can be reduced. There is an effect that it can be realized.

Furthermore, the paper loss state detection device of the foil stamping machine of the present invention can greatly simplify the pasting state confirmation process of the hologram foil that has been carried out until now, not only the labor associated with these can be simplified, There is an effect that the work can be greatly improved by reducing various kinds of work.

Hereinafter, the specific configuration of the sheet loss state detection device of the foil stamping machine of the present invention will be described, but the present invention is not limited to this embodiment as long as it is within the scope of the technical idea described in the claims. Are included.

A sheet loss state detection apparatus for a foil stamper according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a paper missing state detecting device of a foil stamper according to the present invention, FIG. 2 is a schematic diagram showing an example of a paper missing state detecting device according to the present invention, and FIG. FIG. 4 is a diagram showing an example of a perspective view of the upper surface plate as viewed from above, FIG. 4 is a diagram showing an example of a paper loss detection state in the detection sensor of the present invention, and FIG. FIG. 6 is a view showing an example in which a sheet presence / absence detector is provided at the center of the panel, FIG. 6 is a view showing an example of a state where the sheet is pressed by a folded sheet, and FIG. 7 shows a sheet missing state detection step of the present invention. Each flowchart is shown.

The structure of the foil stamping machine (4) of this invention is demonstrated using FIG. The foil pusher (4) is operated by the operation means (M1), and the sheet pusher is fed by the feeding means (M3) of the paper transport mechanism (5B) by the supply means (M2) as the paper feed section (A). (B) and the paper state is detected by the detection means (M4) as the paper loss detector (10B). The information is judged by the judging means (M6). If the judgment result is normal, the pattern foil (2) is pressed by the processing means (M7), and the paper ejecting means (M8) as the paper ejecting section (C). It is discharged sequentially. On the other hand, if the determination result is abnormal, the supply means (M2) is stopped by the stop means (M9), and the alarm means (M10) informs that a missing sheet has occurred around. A series of these controls is performed by the control means (M5) connected to each means described above. In addition, when the abnormality of the sheet is confirmed, the same process is repeated again from the supply unit (M2) through the return unit (M11) for removing the missing sheet.

FIG. 2 shows a foil stamper (4) according to the present invention. The main mechanism of the foil stamping machine (4) is composed of a paper feeding unit (A), a foil stamping unit (B), and a paper discharge unit (C). The foil stamping part (B) comes from the upper surface plate (1B), the lower surface plate (2B), the foil feeding part (3B), the foil winding part (4B), the paper transport mechanism (5B), and the air injector (6B). Become. The upper surface plate (1B) is provided with a marking (7B), a detection sensor light projecting portion (8B) and a detection sensor light receiving portion (9B), which are features of the present invention.

FIG. 3 is a perspective view of the upper surface plate (1B) of FIG. On the upper surface plate (1B), 16 inscriptions (7B) of 4 columns × 4 rows are arranged. Further, at the four corners of the inscription (7B), a detection sensor light projecting unit (8B) and a detection sensor light receiving unit (9B) forms a pair and is provided at four locations. Of course, the paper loss state detector (10B) as a detection sensor may be sometimes installed in more than four places. FIG. 2 shows the positional relationship between the sheet (1) immediately before stamping, the stamp (7B), the detection sensor light projecting unit (8B), and the detection sensor light receiving unit (9B). The detection sensor light projecting part (8B) and the detection sensor light receiving part (9B) are located at the four corners of 1).

FIG. 4 shows a detection state of the detection sensor in the foil pressing portion (B) when a reflective photoelectric sensor is used as the photoelectric sensor. FIG. 4A shows a state in which the foil pressing is normal, and the sheet (1) passes between the upper surface plate (1B) and the lower surface plate (2B) and shows a state immediately before the foil pressing. After determining that there is no paper missing state by irradiating light from the detection sensor light projecting part (8B), reflecting it at the corner of the paper (1), and receiving light by the detection sensor light receiving part (9B). Foil stamping is performed normally.

Next, FIG.4 (b) shows foil stamping in an abnormal state. The paper (1) passes between the upper surface plate (1B) and the lower surface plate (2B), and shows a state where the corner of the paper (1) is bent due to some factor. In this case, since the corner of the paper (1) is bent in the direction of the marking (7B), the light reaches the lower surface plate (2B) even if light is emitted from the detection sensor light projecting unit (8B). Since the light reflection angles are different, the detection sensor light receiving unit (9B) cannot receive a necessary amount of light. At this time, it is determined that there is an abnormal state, that is, there is a paper defect, and the foil stamping machine (4) stops.

Moreover, it is desirable to provide a light absorption part (11B) in the lower surface plate (2B) located under the detection sensor light projecting part (8B) and the detection sensor light receiving part (9B). In that case, the light absorption part (11B) absorbs the irradiation light from the detection sensor light projection part (8B) and does not reflect the light to the detection sensor light projection part (8B). Therefore, it is possible to improve the detection accuracy of the paper missing state. Here, black ink printing, coating, or an article made of a black material may be attached to the light absorbing portion (11B). In the present embodiment, the detection sensor light projecting unit (8B) and the detection sensor light receiving unit (9B) have been described as separate configurations. However, the detection sensor light projecting unit (8B) and the detection sensor light receiving unit (9B) An integrated detector may be used. In some cases, a transmissive photoelectric sensor is used as the photoelectric sensor. Although not shown, the paper loss state detector (10B) includes a detection sensor light projecting unit (8B) and a detection sensor light receiving unit (9B).

Next, an example of a method for detecting a corner break of the foil stamper (4) in the present invention will be described with reference to the flowchart of FIG. First, after laminating the sheets (1) on the sheet feeding unit (A), the foil pusher (4) is operated (S1). The sheets stacked on the sheet feeding unit (A) are taken out one by one from the top, and conveyed to the foil pressing unit (B) by the gripper of the sheet conveying mechanism (5B) (S2).

Next, in the foil pressing unit (B), the paper (1) is gripped from the paper feeding unit A by the gripper of the paper transport mechanism (5B), transferred to the front of the paper discharging unit (C), and stopped momentarily. After air is blown onto the paper (1) with the air ejector (6B), the paper missing state detector (10B) is activated (S3), and if the determination result is normal (S4; no paper missing state), the lower part The sheet and hologram foil are pressed (S5) by raising the surface plate (2B). At this time, the hologram foil is also transferred from the foil feeding unit (3B) to the foil winding unit (4B) with the transfer of the paper (1). Further, the sheet pressed by the sheet pressing unit (B) on the sheet (1) is conveyed to the sheet discharging unit (C) by a gripper (S6), and is sequentially discharged and stacked.

On the other hand, if the paper missing state detector (10B) is activated and the determination result is abnormal (S4; paper missing state), the apparatus is stopped (S7), or an abnormality is notified to the work by a warning sound or warning light. Shall. When there is an abnormality, the missing sheet is taken out from the stopped foil press (S8), and the apparatus is operated again (S9).

Next, an application example in the embodiment of the present invention will be described with reference to FIG. FIG. 5 has the same configuration as the perspective view of FIG. 3, and the detection method and the like are performed in the same manner, so that the description thereof is omitted. However, the difference from FIG. 3 is that a sheet presence / absence detection unit (12B) is provided at the center of the upper surface plate (1B). As an advantage of providing the sheet presence / absence detection unit (12B), there is a case where the foil pusher (4) is in a so-called idle operation when the machine is operated in a state in which a sheet is not inserted, such as a warm-up operation before work. At this time, if the paper missing state detector (10B) of the present invention is caused to function, the machine is stopped. Therefore, it is necessary to stop the function of the paper missing state detector (10B) during idle operation.

  Therefore, a paper presence / absence detection unit (12B) is provided as a method of operating without stopping the function of the paper loss state detector (10B) even during idle operation. As a specific detection method, after the presence / absence of the paper is determined by the paper presence / absence detection unit (12B), if there is a paper, the function of the paper missing state detector (10B) is activated. The function of the paper missing state detector (10B) is stopped. Thereby, even if the foil stamping machine (4) is idle, it can be operated without stopping the paper missing state detector (10B).

Although the example has been shown so far, the present invention is not limited to this embodiment and may be changed to another embodiment. For example, it can be easily imagined that photoelectric sensors are provided at positions other than the four corners (for example, the edge of the paper).

It is a block diagram which shows the structure of the paper missing state detection apparatus in the foil stamping machine of this invention. It is the schematic which shows an example of the foil stamping machine of this invention. It is a figure which shows an example of the perspective view which reversed the upper surface plate of this invention and was seen from the top. It is a figure which shows an example of the detection state of the detection sensor of this invention. It is a figure which shows an example which provided the paper presence-and-absence detection part in the center in the upper surface plate of this invention. It is a figure which shows the state pressed foil by the corner folding paper. It is a flowchart figure which shows the corner break detection process of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper 2 Design foil 3 Defective foil stamping 4 Foil stamping machine A Paper feeding part B Foil pushing part C Paper discharge part 1B Upper surface plate 2B Lower surface plate 3B Foil feeding part 4B Foil winding part 5B Paper conveyance mechanism 6B Air injector 7B Stamp 8B Detection sensor light projecting unit 9B Detection sensor light receiving unit 10B Paper missing state detector 11B Light absorbing unit 12B Paper presence / absence detecting unit S1 Device operation process S2 Paper transport process S3 Paper inspection process S4 Missing condition determination process S5 Foil pressing process S6 Paper discharge process S7 Equipment stop process S8 Missing paper removal process S9 Equipment restart process

Claims (6)

A paper feed unit that sequentially feeds the stacked paper, a fixed lower surface plate that performs foil stamping on the paper supplied from the paper feed unit, and a contact with the lower surface plate located above the lower surface plate An upper surface plate that oscillates, a temperature pressing mechanism that heats the lower surface plate and the upper surface plate, and a paper discharge unit that discharges and stacks sheets pressed by the foil pressing portion. In the foil stamping machine consisting of
A paper missing state detecting device for detecting a missing state of the paper transported to the foil pressing unit, wherein the paper missing state detecting device is provided with detection sensor projections on at least four corners of the upper surface plate for foil pressing the paper. A pair of a light part and the detection sensor light projecting part, the detection sensor light receiving part for receiving the light emitted from the detection sensor light projecting part, and the light reception result of the detection sensor light receiving part, the paper And a control unit that controls the operation of the detection sensor light projecting unit, the detection sensor light receiving unit, and the determination unit. .   2. The paper missing state detecting device according to claim 1, wherein the paper missing state detecting device uses a reflection type photoelectric sensor or a transmission type photoelectric sensor to check the presence / absence state of the paper.   3. The paper missing state detection device further comprises a light absorption unit for appropriately absorbing sensor light between the detection sensor light projecting unit and the detection sensor light receiving unit. Paper missing state detection device.   The said sheet | seat missing state detection apparatus is attached with the stop part which stops the said foil stamping machine, when the determination result of the said determination part determines with a missing sheet | seat. The paper missing state detection device according to any one of the preceding claims.   The paper loss state detection device is provided with an alarm unit for notifying that a defective paper sheet has occurred around the foil press when the determination result of the determination unit determines that there is a defective sheet. The paper loss state detection device according to claim 1.   4. The paper missing state detection according to claim 1, wherein the paper missing state detecting device is provided with a paper presence / absence detecting unit that detects the presence / absence of paper on the upper surface plate. 5. apparatus.

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