JPH09109372A - Product inspecting apparatus and mark presence or absence inspecting means - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a defective product from being regarded as being a non- defective product due to the removal of an identification mark. SOLUTION: This product inspecting apparatus comprises product inspecting means 10 for inspecting the presence or absence of the defective position of the unit printed part of a sheet-like printed matter 2, a marking means 20 for attaching an identification mark to the product detected at its defective position by the means 20, and a mark presence or absence inspecting means 30 for inspecting whether the mark is attached to the side edge of the unit printed part having the defective position or not.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a product inspection apparatus for inspecting a defective portion of a product and attaching an identification mark to the product having the defective portion, and a mark presence / absence inspecting means.

[0002]

2. Description of the Related Art Many products are supplied in the form of printed sheets in the manufacturing process. For example, a packaging bag or the like is manufactured by printing the same pattern in parallel on a transparent film in the width direction, and repeatedly printing the printed product in a predetermined cycle over the longitudinal direction of the film. Then, conventionally, such a defective portion of the sheet-shaped printed matter has been detected in the winding step of the sheet-shaped printed matter, and this work is called a test operation.

For the inspection operation in the winding step, a product inspection apparatus usually equipped with an image pickup means sequentially reads, for example, one cycle of images of a pattern of a traveling sheet-like printed matter, collates it with a master pattern, and prints it. Inspecting for defects such as defects and foreign matter. Then, an identification mark is applied to the defective product by a marking means or an identification label is attached so that the defective product can be discriminated and removed when the sheet-like printed matter is cut during bag making or the like. There is.

By the way, in the marking means for attaching the identification labels, a long mount having a plurality of identification labels attached at regular intervals is wound around a reel, and the mount is sequentially fed out from the reel to detect defective products, for example. Although the identification labels are sequentially attached to the side edges, the identification labels may drop off from the mount when the mount is wound around the reel or when the mount is unwound from the reel. In this way, when the identification label falls off, the operation of attaching the identification label performed by the marking means becomes a blank operation, and the identification label may not be attached to the defective product, so that the defective product is not marketed. There was a problem of flowing. Therefore, recently, there is a structure in which an inspection means for inspecting whether or not the identification label is adhered to the mount is provided immediately before being adhered to the sheet-like printed matter to prevent the marking means from idling. .

[0005]

However, even when the inspection means is provided as described above, a defect that defective products still flow to the market may occur. The applicant has
As a result of various studies on the cause of this, the identification label once attached has fallen off due to defective attachment of the identification label to the defective product, vibration during feeding of the sheet-like printed matter in the product inspection device, etc. I found out that. This kind of marking means is an optional item of the product inspection device and is usually manufactured by a company different from the product inspection device. It is probable that it was difficult to find out the dropout. Further, even in a marking means of a type in which an identification mark is applied by inkjet, the identification mark may not be applied to a defective product due to nozzle clogging or the like.

It is an object of the present invention to provide a product inspection apparatus and a mark presence / absence inspection means which can prevent defective products from being regarded as non-defective products due to dropping of identification marks.

[0007]

According to a first aspect of the present invention, there is provided a product inspection device for inspecting a product for defective parts, and an identification mark for a product whose defective part is detected by the product inspection device. And a mark presence / absence inspecting unit for inspecting whether or not an identification mark is attached to a corresponding portion of the product having the defective portion.

Here, as described in claim 2, the marking means attaches an identification label to the product as an identification mark, and the marking means attaches the identification label. It is a preferred embodiment that a pressure contacting means for pressing the identification label with the product is provided, and after passing through the pressure contacting means, the presence or absence of the identification label attached to the product is inspected by the mark presence / absence inspection means. Further, as described in claim 4, a product is a sheet-like printed matter obtained by printing the same pattern on a long sheet-like member periodically and repeatedly.
It may be composed of printed matter for a period, and in this case, as described in claim 5, the sheet length from the one end of the sheet-like printed matter to the product in which the defective portion is detected or the number of products is sequentially counted and stored. Means may be provided.

The mark presence / absence inspecting means of the product inspection apparatus according to claim 6 inspects the presence / absence of a defective portion of the product, and in the post-process of the product inspection in which an identification mark is attached to the product having the defective portion, the defective portion It is to inspect the presence or absence of the identification mark attached to the product having.

[0010]

In the product inspection apparatus according to the present invention, when the product is inspected by the product inspection means and a defective portion is detected and it is determined that the product is defective, the marking means detects the defective product. The identification mark is attached, and the mark presence / absence inspection means inspects whether or not the identification mark is surely attached to the corresponding portion of the defective product.

When the marking means for sticking the identification label on the product is used as the identification mark, the method according to claim 3
As described, a pressure contacting means for pressing the identification label onto the product is provided, and the identification label is securely attached to the defective product so that the identification label does not drop off after passing through the pressure contacting means, that is, due to vibration during transfer. In this state, the mark presence / absence inspecting means inspects the presence / absence of the identification label.

Further, in the case where the same design is periodically and repeatedly printed on a long sheet-like member such as a packaging bag, and the unit printing portion for one cycle of the sheet-like printed matter is a product, the sheet is used. A means for sequentially counting and storing the sheet length or the number of products from one end to the product in which the defective portion is detected is provided, and the position and the number of defective products in one roll around which the printed matter is wound are displayed. Or may be printed.

In the mark presence / absence inspection means of the product inspection apparatus according to the present invention, the presence / absence of a defective portion of the product is inspected,
In the post-process of the product inspection in which the product having the defective portion is provided with the identification mark, the product having the defective portion is inspected for the presence or absence of the identification mark.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is a case where the present invention is applied to a product inspection device that continuously inspects a printing defect of a long sheet-like printed matter or foreign matter inclusion. As shown in FIG. 1, the product inspection device 1 includes a feeding roll 3 wound with a sheet-shaped printed material 2 and a winding roll 4 that winds up the sheet-shaped printed material 2 fed from the feeding roller 3.
A rotary encoder 5 that outputs a pulse signal each time the sheet-like printed matter 2 is fed by a certain distance, both rolls 3,
Product inspection means 10 for sequentially inspecting defective portions of the sheet-shaped printed matter 2 that is continuously fed between four units for each cycle of the unit printing unit 2a (see FIG. 2), and the inspected unit printing unit 2a.
If there is a defective portion, the marking means 20 for sticking the identification label 6 (see FIG. 2) to the side edge of the unit printing portion 2a as a defective product, and the identification label 6 at the corresponding position of the defective product.
Mark presence / absence inspecting means 30 for inspecting whether or not is attached, and a processing unit 7 for processing image data, various signals, and the like.
And a plurality of guide rollers 8 for guiding the sheet-like printed matter 2.

As the sheet-like printed matter 2, as shown in FIG. 2, unit printing portions 2a having a constant width are repeatedly printed in the longitudinal direction of the film, and a delimiter mark is provided on one side of a boundary portion between adjacent unit printing portions 2a. 2b is printed. still,
As a material for the film of the sheet-shaped printed matter 2, a synthetic resin film, a laminated film, or the like can be adopted.

The product inspection means 10 is, as shown in FIG.
It has a general configuration including an image pickup unit 11 including a two-dimensional sensor represented by a CCD camera or a vidicon, a CCD line sensor, and the like, and an illumination unit 12 that illuminates an image pickup area of the image pickup unit 11. In the processing unit 7, the image data of the unit printing unit 2a of the sheet-shaped printed matter 2 is sequentially captured by the image pickup unit 11 based on the delimiter mark 2b, and the image data is subjected to binarization processing or the like to obtain a master pattern. The defective part is inspected by collating with.
Although the illuminating means 12 in the illustrated example uses both the reflective illumination and the transmissive illumination, only one of the illuminating means, the reflective illumination or the transmissive illumination, may be used. In addition, visible light, infrared rays, ultraviolet rays, γ rays, or the like can be used as the illumination.

In the processing section 7, the pulse signal from the encoder 5 or the number of the delimiter marks 2b photographed by the image pickup means 11 is sequentially counted, and the product inspection means 10 is detected.
The data of the presence / absence of a defective portion of the unit printing unit 2a, which is inspected by, is stored in association with the position of the unit printing unit 2a from the starting end of the sheet-shaped printed material 2. Then, the number of defective products in one roll and the position data thereof are displayed or printed via an output means (not shown). However, regarding the unit printing unit 2a having a defective portion, the image data thereof may be sequentially stored, and together with these image data, a defective printing state such as a print misregistration or a shade abnormality may be stored or may be stained. The position of the print defect such as foreign matter may be stored.

The marking means 20 is a product inspection means 10.
This is for sticking the identification label 6 to the unit printing section 2a which is determined to be a defective product as a result of the inspection. Specifically, as shown in FIG. 3, a long mount 21 having a plurality of identification labels 6 attached at regular intervals is sequentially fed out from a reel 22, and a label presence / absence sensor 23 identifies the mount 21 at a predetermined position. After inspecting whether or not the label 6 is attached, the identification label 6 is peeled off from the mount 21 at the tip of the peeling plate 24 and supplied onto one side of the defective product, and the peeled identification label 6 is the label. The backing paper 21 after the identification label 6 is removed by pressing the defective product with the pressing roll 25 so as not to drop it off is configured to be wound on the scrap winding roll 26.

The driving unit (not shown) of the marking means 20 is
The mount 21 is fed so that the identification labels 6 attached to the mount 21 are sent one by one to the peeling plate 24 side, and the drive timing is output when the product inspection means 10 detects a defective product. Based on the signal and the pulse signal output from the encoder 5, it is set to operate when a defective product detected by the product inspection means 10 is transferred to just below the tip of the peeling plate 24. However,
The identification label 6 may be attached to a portion of the side edge of the sheet-like printed matter 2 corresponding to the defective portion. When the label presence / absence sensor detects that the identification label 6 has fallen off, when the backing sheet 21 portion is located at the tip of the peeling plate 24, one identification label 6 is preliminarily fed, and the marking means 20 idles. It is configured not to.
As the label presence / absence sensor 23, it is possible to use various non-contact type sensors, such as an optical sensor and a capacitance type sensor.

As shown in FIGS. 1 and 4, the mark presence / absence inspecting means 30 is for inspecting whether or not the identification label 6 attached to the defective product by the marking means 20 has fallen off. Then, downstream of the label pressing roll 25 in the traveling direction of the sheet-like printed matter 2, preferably the guide roller 8
It is arranged on the downstream side of A so as to face the passage position of the identification label 6. That is, the identification label 6 peeled off by the peeling plate 24 is once brought into pressure contact with the defective product by the label pressing roll 25, and then again brought into contact with the defective product by the guide roller 8A, and the downstream of the label pressing roll 25. On the side, in particular, on the downstream side of the guide roller 8A, there is almost no drop off. Therefore, by checking the presence or absence of the identification label 6 at this position, the identification label 6 due to vibration during traveling of the sheet-like printed material 2 or the like is detected. It is possible to reliably detect the dropout.

The mark presence / absence inspecting means 30 is a reflective or transmissive optical sensor equipped with a sensor capable of detecting visible light, infrared rays, ultraviolet rays, γ-rays, etc., and is two-dimensionally represented by a CCD camera or a vidicon. It is composed of a sensor and a non-contact type sensor such as a CCD line sensor, a photoelectric tube, a capacitance type sensor and the like. When the identification label 6 is made of a magnetic material, a magnetic sensor can be used.

The inspection result obtained by the mark presence / absence inspection means 30 is output to the processing unit 7, and when it is detected that the identification label 6 is not attached to the defective product, the product inspection is performed at that time. The sheet feeding operation of the apparatus 1 is stopped to issue a warning, and the operation is stopped until the operator attaches the identification label 6 to the defective product and restarts it. However, even if it is detected that the identification label 6 is not attached,
Without stopping the sheet feeding operation, the identification label 6 together with the above-described data regarding the presence / absence of a defective portion of the unit printing unit 2a
It is also possible to store data for notifying that the identification label 6 has fallen off, and after the inspection of one roll, find a defective product in which the identification label 6 has dropped off based on this data. In this way, the inspected sheet-like printed matter 2 will be removed of defective products based on the identification label 6 when it is sequentially cut in the bag-making process, for example.

As described above, in the product inspection device 1,
Since the presence or absence of the identification label 6 is inspected while the identification label 6 is stably attached to the sheet-like printed matter 2,
The identification label 6 rarely comes off after the inspection, and the reliability of the inspection result by the mark presence / absence inspection means 30 becomes high. For this reason, it is possible to reliably prevent defective products from flowing to the market as they are due to the removal of the identification label 6. still,
Even when the marking means of the type that applies the identification mark to the sheet-like printed matter 2 is used as the marking means 20, by inspecting the identification mark by the mark presence / absence inspecting means 30, a defect due to malfunction of the marking means, For example, in the case of applying by an inkjet, it is possible to reliably prevent a defect due to the identification mark not being applied to a defective product due to nozzle clogging or the like.

Next, another embodiment in which the structure of the product inspection device 1 is partially changed will be described. The same members as those in the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. As shown in FIG. 5, in this product inspection device 40, a rotary cutter 41 is provided on the downstream side of the product inspection means 10, and the sheet-like printed material 2 inspected for defective portions is cut into unit printing units 2a, The sheets are sequentially placed in a layered manner on the elevating table 42 that descends by the thickness of the sheet. Marking means 43 is provided above the lift table 42, and when the unit printing section 2a inspected by the product inspecting section 10 is determined to be defective, the unit printing section 2a is placed on the lift table 42. Immediately before being placed, the identification sheet 44 is sandwiched below the marking means 43 by the marking means 43. The mark presence / absence inspecting unit 3 faces the uppermost unit printing unit 2a of the unit printing units 2a stacked on the elevating table 42 and at a position corresponding to the identification sheet 44.
0 is provided, and the presence / absence of the identification sheet 44 is inspected by the mark presence / absence inspecting means 30. However, the identification sheet 44
A plurality of unit printing units 2a may be placed on the top of the unit printing unit 2a, and the identification sheet 44 may be prevented from falling off, and then the presence or absence of the identification sheet 44 may be inspected. In the product inspection device 40, the identification sheet 44 is inserted after being sandwiched between the unit printing units 2a.
The presence or absence of the identification sheet 44
It is possible to reliably detect the falling off of the sheet, and it is possible to reliably prevent a defect due to the identification sheet 44 not being attached.

In the present embodiment, the present invention is applied to the product inspection devices 1 and 40 for the sheet-like printed matter 2, but after the product inspection, the identification label 6 is attached or the identification mark is attached to the defective product. The present invention can be applied to a product inspection device for a plate-shaped or block-shaped product as long as it is applied or the identification sheet 44 is attached.

[0026]

According to the product inspection apparatus of the present invention, the mark presence / absence inspection means inspects whether or not the identification mark is surely attached to the corresponding portion of the defective product. It is possible to reliably inspect for sticking defects and the like, and it is possible to prevent defective products from leaking to the market due to the identification label falling off or the like.

Further, a pressure contact means for pressing the identification label onto the product is provided, and after passing through the pressure contact means, when the presence or absence of the identification label attached to the product is inspected by the mark presence / absence inspection means, the identification label comes off after the inspection. Is prevented, and the reliability of the inspection result is further enhanced.

Further, if a means for sequentially counting and storing the sheet length from the one end of the sheet-like printed matter to the product in which the defective portion is detected or the number of products is provided, the number of defective products on the data and the actual identification label are identified. By comparing with the number of defective products that have been attached, it is possible to inspect whether or not the identification label is missing, and even if the identification label is missing, the identification label can be obtained from the count value. It is possible to identify the location of the defective product that has dropped out.

According to the mark presence / absence inspecting means of the product inspection apparatus according to the present invention, it is inspected whether or not the identification mark is surely attached to the corresponding portion of the defective product, so that the identification label is not attached to the defective product. It is possible to reliably inspect such items, and it is possible to prevent defective products from flowing to the market due to the identification label falling off or the like.

[Brief description of the drawings]

[Figure 1] Overall configuration diagram of the product inspection device

FIG. 2 is a plan view of a sheet-like printed matter.

FIG. 3 is a schematic configuration diagram of marking means.

FIG. 4 is a perspective view around the mark presence / absence inspection means.

FIG. 5 is an overall configuration diagram of a product inspection device according to another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Product inspection device 2 Sheet-like printed matter 2a Unit printing section 2b Separation mark 3 Feeding roll 4 Winding roll 5 Rotary encoder 6 Identification label 7 Processing section 8 Guide roller 8A Guide roller 10 Product inspection means 11 Imaging means 12 Illumination means 20 Marking means 21 mount 22 reel 23 label presence / absence sensor 24 peeling plate 25 label holding roll 26 scrap winding roll 30 mark presence / absence inspection means 40 product inspection device 41 rotary cutter 42 elevating table 43 marking means 44 identification sheet

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masato Matsui 1-5 Otoyanagi-cho, Kamitoba, Minami-ku, Kyoto Duck Engineering Co., Ltd.

Claims (6)

[Claims] 1. A product inspection means for inspecting the presence or absence of a defective portion of a product, a marking means for attaching an identification mark to a product whose defective portion is detected by the product inspection means, and a product having the defective portion. A product inspection device comprising mark presence inspection means for inspecting whether or not an identification mark is attached to a location. 2. The product inspection apparatus according to claim 1, wherein the marking means attaches an identification label to the product as an identification mark. 3. A pressure contact means for pressing the identification label attached by the marking means to the product is provided, and after passing through the pressure contact means, the mark presence / absence inspection means inspects the presence or absence of the identification label attached to the product. Item inspection apparatus according to item 3. 4. The product inspection apparatus according to claim 1, wherein the product is composed of a printed material for one cycle of a sheet-shaped printed material in which the same pattern is periodically and repeatedly printed on a long sheet-shaped member. 5. The product inspection apparatus according to claim 4, further comprising means for sequentially counting and storing the sheet length or the number of products from one end of the sheet-shaped printed matter to the product in which a defective portion is detected. 6. A product having a defective portion is inspected for presence or absence of an identification mark in a post-process of a product inspection in which a product having a defective portion is inspected for the presence of a defective portion. Mark presence / absence inspection means for product inspection equipment.