JP7220128B2 - Glass bottle inspection method and glass bottle manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for inspecting a glass bottle having engraving on the surface of the body and a method for manufacturing the glass bottle.

BACKGROUND ART A glass bottle having an uneven surface and a sculpture is known. Glass bottles with engravings have originality and a sense of luxury, and give a favorable impression to consumers.

For example, Patent Document 1 has been proposed as a method for inspecting a glass bottle having an uneven surface. In the invention of Patent Document 1, a carved surface with unevenness and a smooth surface without unevenness are optically determined.

JP-A-58-216906

However, in the invention of Patent Document 1, it is only possible to determine whether the surface has unevenness or not, and the defect of the glass bottle cannot be inspected. When trying to optically inspect a glass bottle with an uneven engraving, it is difficult to determine whether the shadow is due to unevenness or a shadow due to defects such as scratches or bubbles. Even now, the presence or absence of flaws such as scratches and bubbles in glass bottles with unevenness depends solely on visual inspection.

Accordingly, the present invention provides an inspection method and a glass bottle manufacturing method for automatically determining the presence/absence of defects in a glass bottle having an engraving on its surface from an image.

The present invention has been made to solve at least part of the above problems, and can be implemented as the following aspects or application examples.

In the following explanation, "sculpture" refers to the design of unevenness on the surface of the glass bottle, and "pattern" refers to changes in light and dark density caused by the "sculpture" that appears in the image obtained by imaging the glass bottle. is.

[1] One aspect of the glass bottle inspection method according to the present invention is
A method for inspecting a glass bottle having an engraving on the surface of the body, comprising:
an image acquisition step of capturing an image of the rotating glass bottle and capturing an image of the entire circumference of the body;
a masking step of masking an engraving area including a pattern derived from the engraving from the image;
a determination step of determining whether or not there is a defect in the image except for the masked engraving area;
including
a pattern position detection step of searching the image obtained in the image obtaining step using a pattern registration image created in advance based on the outline of the engraving to detect the pattern;
The masking step masks the engraving region including the pattern detected by the pattern position detecting step, and masks a plurality of inspection regions having a preset shape based on the position of the pattern detected by the pattern search. place it in the image,
The plurality of inspection areas includes a first inspection area surrounding the engraving area, a second inspection area surrounding the first inspection area, and two third inspection areas arranged to sandwich the second inspection area. an inspection region;
The third inspection area is arranged in each part where a joint line of sight appears in the image,
In the determination step, a predetermined inspection algorithm is executed for each of the first inspection area, the second inspection area, and the third inspection area to determine whether or not there is a defect;
The inspection algorithm for the third inspection area is characterized by distinguishing between the detection object and the joint line and determining whether or not they are defects .

According to one aspect of the glass bottle inspection method described above, since the presence or absence of defects is determined by excluding the engraving area, the presence or absence of defects in the glass bottle having the engraving on the surface can be automatically determined from the image. According to one aspect of the glass bottle inspection method, the pattern is detected using the pattern registration image created based on the outer shape of the engraving, so the position of the pattern can be stably detected even if the pattern is thin. be able to.

[2] In one aspect of the glass bottle inspection method,
The defects include at least surface defects,
In the image acquisition step, transmitted light transmitted through the trunk can be imaged by a line sensor.

According to one aspect of the above-described glass bottle inspection method, by capturing images of transmitted light with a line sensor, it is possible to automatically determine from images even defects such as surface bubbles that are not easily shaded.

[ 3 ] In one aspect of the glass bottle inspection method,
In the pattern position detection step, a pattern search can be performed with respect to a predetermined height range in the image.

According to one aspect of the glass bottle inspection method, since the height at which the pattern appears in the image is substantially constant, the load on the inspection apparatus can be reduced by performing a pattern search for a predetermined height range.

[ 4 ] One aspect of the method for manufacturing a glass bottle according to the present invention is
A parison is formed from a gob with a rough mold, the parison is formed into the glass bottle with a finishing mold, and one aspect of the glass bottle inspection method is performed on the glass bottle, and the glass is determined to have no defects. Characterized by getting a bottle.

According to one aspect of the glass bottle manufacturing method described above, defects can be automatically determined even for a glass bottle having an engraving, so that a defect-free glass bottle can be manufactured.

According to one aspect of the glass bottle inspection method of the present invention, it is possible to automatically determine the presence/absence of a defect in a glass bottle having an engraving on its surface from an image. According to one aspect of the method for manufacturing a glass bottle according to the present invention, even a glass bottle having an engraving can be manufactured without defects.

It is a side view which shows an inspection apparatus typically. It is a top view which shows an inspection apparatus typically. It is a flow chart of the inspection method concerning this embodiment. It is an example of an image. It is a figure explaining image processing, a detection process, and a mask process. It is a figure explaining an image processing and a mask process. It is a figure explaining a determination process.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings. It should be noted that the embodiments described below do not unduly limit the scope of the invention described in the claims. Moreover, not all the configurations described below are essential constituent elements of the present invention.

A method for inspecting a glass bottle according to the present embodiment is a method for inspecting a glass bottle having an engraving on the surface of the body, wherein the rotating glass bottle is imaged to obtain an image of the entire periphery of the body. an acquiring step of acquiring, a masking step of masking an engraving region including a pattern derived from the engraving from the image, a determining step of determining whether or not there is a defect in the image except for the masked engraving region; characterized by comprising

The method for manufacturing a glass bottle according to the present embodiment includes forming a parison from a gob with a rough mold, forming the parison into a glass bottle with a finishing mold, and performing one aspect of the glass bottle inspection method on the glass bottle. It is characterized by obtaining a glass bottle that has been determined to be free of the above defects.

1. Inspection Apparatus The inspection apparatus 1 for glass bottles 10 will be described in detail with reference to FIGS. 1 and 2. FIG. FIG. 1 is a side view schematically showing an inspection apparatus 1 used in an inspection method according to this embodiment, and FIG. 2 is a plan view schematically showing the inspection apparatus 1. As shown in FIG.

The inspection device 1 shown in FIGS. 1 and 2 is for a glass bottle 10 having an engraving 15 on its surface. The inspection apparatus 1 is incorporated as part of a production line for the glass bottles 10 (not shown), conveys the glass bottles 10 that have been molded and then annealed to the inspection apparatus 1, and conveys the inspected glass bottles 10 to the next process. .

The inspection apparatus 1 includes a light-emitting section 20 having a light-emitting surface 22 for irradiating the glass bottle 10 with light, an imaging section 40 arranged to face the light-emitting section 20 with the glass bottle 10 interposed therebetween, and an imaging section 40 for imaging. and a control unit 50 including a determination unit 52 that determines the presence or absence of defects based on an image 80 ( FIG. 4 ) of the glass bottle 10 that has been processed.

Here, as shown in FIG. 1, the glass bottle 10 is inspected in an upright state, that is, in a state in which the central axis 12 extends vertically. The vertical direction is the direction of gravity, and the horizontal direction is the direction orthogonal to the vertical direction.

The inspection apparatus 1 includes a mounting table 30 that supports the glass bottle 10 while rotating it around the central axis 12 and a side roller 32 that rotates the glass bottle 10 while contacting the side surface of the glass bottle 10 . In FIG. 1, the side roller 32 is shown to be between the glass bottle 10 and the imaging unit 40, but this is for convenience of explanation of the side roller 32, and the side roller 32 is the glass bottle in the imaging unit 40. 10 is placed at a position that does not interfere with imaging.

The vial 10 is transparent or translucent. Translucency is a degree of transparency that allows the light from the light-emitting part 20 transmitted through the glass bottle 10 to detect defects, such as surface bubbles 18, of the body 13 of the glass bottle 10. FIG. The glass bottle 10 is, for example, a wide-mouthed bottle having a neck portion 11 and a body portion 13 with a circular cross section and a bottom portion 14 . The cross-sectional shape of the glass bottle 10 may be polygonal. A vial 10 has an engraving 15 on its surface. The engravings 15 are unevennesses formed on the surface of the glass bottle 10, and are formed by, for example, unevennesses carved on the surface of the mold during molding.

The side rollers 32 contact the barrel 13 and rotate the glass bottle 10 around the central axis 12 . The central axis 12 is an imaginary line that serves as the rotational central axis around which the glass bottle 10 rotates. The side roller 32 rotates the glass bottle 10 by transmitting the driving force of the motor 60 to the glass bottle 10 via the belt 35 or the like according to a command from the rotation control unit 62 . The side rollers 32 rotate the glass bottle 10 by a predetermined amount at a predetermined speed. The predetermined amount of rotation is sufficient for the entire circumference of vial 10 to be imaged. The predetermined amount of rotation is set to, for example, 1.5 rotations or more so that the entire detected object can be grasped with one piece of image data. Rotation detector 54 can be a rotary encoder attached directly or indirectly to motor 60 . According to the pulse output of the rotation detection section 54, the imaging section 40 takes images of the glass bottle 10 for a predetermined number of times.

The light emitting part 20 is a light source that illuminates the glass bottle 10 . The light emitting unit 20 is a surface light source that has a light emitting surface 22 on the side of the glass bottle 10 and can illuminate the glass bottle 10 from the opposite side of the imaging unit 40 . The light emitting unit 20 is set to a height that can illuminate the entire glass bottle 10, which is the largest size to be inspected by the inspection apparatus 1. As shown in FIG. As shown in FIG. 2 , the overall width W2 of the light emitting surface 22 is narrower than the overall width W1 of the glass bottle 10 . By making the full width W2 narrower than the full width W1, it is possible to clearly image the shadow of the surface foam 18 . The full widths W1 and W2 are the full widths of the glass bottle 10 and the light emitting surface 22 when the inspection apparatus 1 is viewed from above.

As shown in FIG. 2, the light emitting surface 22 has, for example, a rectangular shape, and substantially the entire surface thereof emits light. The light emitting surface 22 faces the glass bottle 10 and the imaging section 40 and is arranged so that the light transmitted through the glass bottle 10 reaches the imaging section 40 .

A known light source such as an LED or an organic EL can be used as the light source of the light emitting unit 20 . The light-emitting part 20 is a diffused illumination, and when LEDs are used, a diffusion plate can be used for the light-emitting surface 22 to irradiate the glass bottle 10 with uniform light. A known diffusion plate that diffuses light from a light source such as an LED and emits it to the outside can be used as the diffusion plate. By diffusing the light with the diffuser plate, it is possible to reduce the unevenness between the portions where the light sources are not present when a large number of light sources are used.

The imaging unit 40 is arranged to face the light emitting unit 20 with the glass bottle 10 interposed therebetween. The imaging unit 40 is arranged so as to image the surface of the glass bottle 10 on the extension line of the central axis 12 . The imaging unit 40 can image at least the portion of the glass bottle 10 to be inspected, and is arranged so that the entire vertical direction of the body 13 of the glass bottle 10 is within the field of view of the imaging unit 40 .

The imaging unit 40 can capture an image including the detection object (including the surface bubbles 18 , for example) by the light of the light emitting unit 20 that has passed through the glass bottle 10 . The imaging unit 40 can use, for example, a known line sensor camera. The image pickup unit 40 picks up an image according to the rotation of the side roller 32 based on the output of the rotation detection unit 54, so that even if the rotation speed changes for some reason, the image 80 is not affected.

The imaging unit 40 images the entire circumference of the torso 13 and transmits the data to the image processing unit 53 of the control unit 50 .

The control section 50 includes a determination section 52 and an image processing section 53 . The control unit 50 is, for example, a CPU (Central Processing Unit) or a GPU (Graphics
Processing Unit) and other processors, HDD (Hard Disk Drive), SSD (Solid State Drive), ROM (Read-Only Memory), RAM (Random Access Memory) and other storage devices, keyboards, mice, touch pads and other input devices , liquid crystal display, organic EL (
It is composed of a display device such as an Electro Luminescence display, a digital input/output board such as an I/O board, and the like. The control unit 50 executes processing for inspecting the glass bottle 10 . The processing in which the inspection apparatus 1 intermittently conveys the glass bottles 10 at a predetermined speed is executed by a control unit separate from the control unit 50 , but may be configured to be executed by the control unit 50 .

The determination unit 52 determines whether or not there is a defect based on the image acquired from the imaging unit 40 . Defects determined by the determining unit 52 are, for example, surface defects. Surface defects are surface bubbles 18, dirt, and foreign matter present on the inner or outer surface of glass bottle 10. FIG. The determination unit 52 may determine, for example, defects inside the glass bottle 10 in addition to surface defects. The determination unit 52 preferably determines, for example, surface bubbles 18 having a vertical length of 3.0 mm or more, a horizontal length of 1.0 mm or more, and a depth of 0.05 mm or more as defects. Moreover, it is desirable that the determination unit 52 does not erroneously determine the pattern in the image derived from the engraving 15 as a defect.

The control unit 50 outputs the determination result of the determination unit 52 to the outside for each glass bottle 10, and, for example, excludes the glass bottles 10 determined to have defects on the line after the discharge unit of the inspection device 1. Specific processing in the control unit 50 will be described in "3. Inspection method" below.

2. Manufacturing Method A method for manufacturing the glass bottle 10 according to the present embodiment will be described. The glass bottle 10 is first molded into a parison from a gob in a rough mold. The parison is molded into a cylindrical shape with a bottom by blowing compressed air into a hot gob placed in a rough mold. A plunger may be used in conjunction with compressed air. Next, the parison is transferred to a finishing mold, and compressed air is blown into the parison in the finishing mold to mold the glass bottle 10 as a product. Since the temperature of the glass bottle 10 immediately after molding is high, it is transferred to a slow cooling furnace and cooled slowly. The following inspection method is performed on the glass bottle 10 coming out of the slow cooling furnace. Then, the following inspection method is performed to obtain the glass bottle 10 judged to have no defect as a non-defective product.

As described above, according to the method for manufacturing the glass bottle 10 according to the present embodiment, defects can be automatically determined even for the glass bottle 10 having the engraving 15, so that the glass bottle 10 without defects can be manufactured. can do.

3. Inspection Method A method for inspecting the glass bottle 10 according to the present embodiment using the inspection apparatus 1 shown in FIGS. 1 and 2 will be described with reference to FIGS. 3 to 7. FIG. FIG. 3 is a flow chart of the inspection method according to the present embodiment, FIG. 4 is an example of the image 80, and FIG. 6 is a diagram for explaining the image preprocessing S14 and the masking step S18, and FIG. 7 is a diagram for explaining the determination step S20.

As shown in FIG. 3, the inspection method according to the present embodiment is a method for inspecting the glass bottle 10 having the engraving 15 on the surface of the body 13, and includes at least an image acquisition step S12, a mask step S18, and a judgment step S18. and S20. The inspection method according to the present embodiment may further include step S10 of starting imaging before S12, may include image preprocessing S14 of performing predetermined processing on the image after S12, and may include image preprocessing S14 of performing predetermined processing on the image after S12. A position detection step S16 may be further included. Each step will be described in order below with reference to FIGS. 1 and 2. FIG.

S10: The control unit 50 commands the imaging unit 40 to start imaging. The image capturing unit 40 captures an image of transmitted light transmitted through the body portion 13 of the glass bottle 10 rotating around the central axis 12 with a line sensor according to a command from the control unit 50 . At that time, the control unit 50 calculates the rotation angle of the glass bottle 10 based on the output from the rotation detection unit 54, and continuously images 1.5 rounds (for example, 360°×1.5=540°). The defects shown in FIG. 1 are, for example, surface bubbles 18 . By capturing an image of transmitted light with a line sensor, it is possible to automatically determine from the image even a defect such as the surface bubble 18 that is difficult to be shaded. The captured image data is transmitted from the imaging section 40 to the control section 50 .

S<b>12 : The control unit 50 executes an image acquisition step S<b>12 for acquiring an image 80 ( FIG. 4 ) in which the entire circumference of the torso 13 is captured and transmitted from the imaging unit 40 . The image 80 is stored in a storage device (not shown) of the controller 50 . The image 80 includes an image of at least 1.5 circumferences of the torso 13 and may further include an image of 1.5 circumferences of the neck 11 . Since the image 80 covers 1.5 or more circumferences of the torso 13, the control unit 50 can continuously display a plurality of inspection regions (82 to 84, 88, 89) corresponding to one circumference of the torso 13. 80 can be placed.

An image 80 shown in FIG. 4 shows a state in which the pattern 15a derived from the engraving 15, the joining lines 16 extending in the vertical direction, and the surface bubble shadow 18a are imaged as dark shadows. The alignment line 16 is a shadow caused by a step formed by the mold used when molding the glass bottle 10 . Shadows determined as defects in the image 80 can include shadows derived from internal bubbles, white stones, foreign matter, etc., in addition to the surface bubble shadows 18a derived from the surface bubbles 18 . In order to clearly distinguish these shadows from the patterns 15a and the matching lines 16 and determine defects, a plurality of rectangular inspection areas (82 to 84, 88, 89 ) is provided, and an inspection algorithm preset for each inspection area is executed. In FIG. 4, each inspection area (82-84, 88, 89) is indicated by a dashed line.

S14: The image processing unit 53 performs image preprocessing S14 on the pattern 15a in order to more reliably perform the pattern position detection step S16. The image preprocessing S14 can perform, for example, a "blurring process" in order to perform a pattern search for the pattern 15a in an abstract shape. The “blurring process” can be performed, for example, by an averaging filter, which is a two-dimensional filter that replaces the pixel value of the pixel of interest with the average value of all pixel values within the filter size range and outputs the result.

Further, as the image preprocessing S14, in addition to the "blurring process", for example, a "dilation process" that dilates the black of the shadow may be employed.

S16: As shown in FIG. 5, the determination section 52 executes a pattern position detection step S16. Before executing the pattern position detection step S16, the operator prepares a pattern registration image 86 that is created in advance based on the outline of the engraving 15, as shown in FIG. 5(a). The pattern registration image 86 may be created based on the outer shape of the pattern 15 a derived from the engraving 15 . The pattern registration image 86 is a frame slightly larger than the engraving 15 and may be set to the same size as the rectangular first inspection area 82 . The pattern registration image 86 is stored in a storage device (not shown) of the controller 50 .

Next, the determination section 52 executes a pattern position detection step S16. As shown in FIGS. 5B and 5C, in the pattern position detection step S16, a pattern registration image 86 created in advance based on the outer shape of the engraving 15 is added to the image 80 acquired in the image acquisition step S12. The pattern 15a is detected by performing a pattern search. The pattern search searches the image 80 for a detected object that matches the pattern registration image 86, and detects the detected object as the pattern 15a when the pattern registered image 86 matches the contour of the pattern 15a to a certain degree. Since the pattern 15a is detected using the pattern registration image 86 created based on the outer shape of the engraving 15, the position of the pattern 15a can be stably detected even if the pattern 15a is light and dark.

The pattern position detection step S16 can perform pattern search for a predetermined height range in the image 80 . As shown in FIG. 1, the glass bottle 10 is placed on the mounting table 30, and the height at which the pattern 15a appears in the captured image 80 is substantially constant. Therefore, as shown in FIG. 4, a pattern search area 85 (rectangular area surrounded by a dashed line) is set to a horizontal range of a second height H2 with a first height H1 from the lower end of the image 80 as a lower limit. , a pattern search is performed in the pattern search area 85 . By performing a pattern search for a predetermined height range in this manner, the processing load of the inspection apparatus 1 can be reduced.

S18: The image processing unit 53 executes masking step S18. As shown in (d) and (e) of FIG. 5, in the masking step S18, the engraving area 81 including the pattern 15a derived from the engraving 15 is masked with a mask 87 from the image 80. FIG. The engraving area 81 is wide enough to include the entire pattern 15a. The engraving area 81 may be an area surrounded by the pattern registration image 86, or may be an area slightly narrower than the pattern registration image 86 and closer to the pattern 15a. Mask 87 is equal to engraving area 81 . The mask 87 is created in advance together with the pattern registration image 86 as a set. The arrangement of the mask 87 and the pattern registration image 86 can also be set in advance. As a result, when the pattern registration image 86 is arranged at an appropriate position with respect to the image 80 by pattern search, the engraving area 81 is set in the image 80 and masked by the mask 87 at the same time. Further, the image processing unit 53 arranges a plurality of inspection regions (82 to 84, 88, 89) having preset shapes on the image 80 based on the position of the pattern 15a detected by the pattern search. By setting the relative positions between the position of the pattern 15a and the positions of the respective inspection areas (82 to 84, 88, 89) in advance, once the position of the pattern 15a is determined, a plurality of inspection areas (82 to 84, 88 , 89 ) can be automatically laid out on the image 80 .

In addition to the above-described S14 to S18, for example, other image processing can be adopted as S14. For example, the image processing unit 53 thickens the pattern 15a by performing expansion processing multiple times as shown in (b) on the image 80 acquired in the image acquisition step S12 in (a) of FIG. c), the determination unit 52 executes the pattern position detection step S16 to set the engraving area 81 on the detected pattern 15a, and the image processing unit 53 performs the masking step S18 as shown in (d). may be executed. In this case, the pattern position detection step S16 can detect the pattern 15a from the center of gravity and the area of the pattern 15a obtained by the binarization process.

S20: The determination unit 52 executes determination step S20. A determination step S20 determines whether or not there is a defect in the image 80 except for the masked engraving area 81 . Since the presence or absence of defects is determined by excluding the engraving area 81 , the presence or absence of defects in the glass bottle 10 having the engraving 15 on the surface can be automatically determined from the image 80 . The determination step S20 executes a predetermined inspection algorithm for each of the first inspection area 82, the second inspection area 83, the third inspection area 84, the fourth inspection area 88, and the fifth inspection area 89 set in the image 80. and determine whether or not there is a defect. Each inspection area is set in advance as a rectangular shape with a predetermined size, for example.

The first inspection area 82 is an area surrounding the engraving area 81 and is narrower than the second inspection area 83 . In the first inspection area 82, the image processing unit 53 performs, for example, the vertical and horizontal When binarization processing is performed after performing direction enhancement processing, the shadow line becomes a continuum as shown in (b). After the binarization process, the determination unit 52 determines whether or not the detection object is a defect based on the area and maximum length of the detection object. The unit 50 treats the glass bottle 10 as a non-defective product (S22). If the detected object is defective, it is determined that there is a defect, and the control unit 50 treats the glass bottle 10 as a defective product (S24).

A second inspection area 83 surrounds the first inspection area 82 and extends from the lower end of the image 80 to the lower end of the neck portion 11 . A second inspection area 83 is a portion other than the first inspection area 82 . The image processing unit 53 performs the same image processing as that for the first inspection area 82 on the second inspection area 83, and the determination unit 52 determines whether or not the detected object is defective (S20). Since the second inspection area 83 is less likely to erroneously determine the pattern 15a as a defect, the determination unit 52 can determine the detected object in the second inspection area 83 with higher accuracy than in the first inspection area 82 .

The two third inspection areas 84 are arranged on the left and right outer sides of the second inspection area 83 and extend from the lower end of the image 80 to the lower end of the neck portion 11 . The third inspection area 84 is arranged in a portion of the image 80 where the alignment line 16 appears. The inspection algorithm in the third inspection area 84 should distinguish the detection object from the matching line 16 . For example, as shown in (c) and (d) of FIG. 7, the distances D1 and D2 between two lines in the horizontal direction within the divided frames are measured by dividing the detection object into a plurality of pieces in the vertical direction. When the distance D1 between two lines is wider than a predetermined width and three or more detected objects in the upper and lower frames are continuous, the determining unit 52 determines that the surface foam 18 exists, and the distance D2 between the two lines is determined to be a predetermined value. If it is narrower than the width of , it is determined that it is the joint line 16 . In addition, the image processing unit 53 removes the vertical shadow (matching line 16) from the image of (e) in FIG. It is determined whether or not there is a defect based on the area of the detected object. Since vertical shadows can be eliminated by emphasizing vertical luminance changes in image processing at this time, surface bubbles having a horizontally elongated portion with vertical luminance changes remain. By applying two different inspection algorithms together in this manner, more accurate inspection can be performed without mistaking the joining line 16 for a defect.

A fourth inspection area 88 is between the second inspection area 83 and the third inspection area 84 and extends from the bottom edge of the image 80 to the bottom edge of the neck 11 . The fourth inspection area 88 is a portion of the trunk 13 facing the second inspection area 83 . The image processing unit 53 and the determination unit 52 can perform the same processing as the second inspection region 83 on the fourth inspection region 88 .

The fifth inspection area 89 is a portion corresponding to the neck portion 11 extending above the second inspection area 83 to the fourth inspection area 88 . The fifth inspection area 89 is divided into two and arranged on the image 80 except for the position where the alignment line 16 is imaged. This is because a disturbance shadow orthogonal to the alignment line 16 may occur at a position sandwiched between the two fifth inspection areas 89 . The image processing unit 53 and the determination unit 52 can perform the same processing as that for the third inspection region 84 on the fifth inspection region 89, for example.

The present invention is not limited to the above-described embodiments, and various modifications are possible, including substantially the same configurations as those described in the embodiments. Here, the "same configuration" means a configuration with the same function, method, and result, or a configuration with the same purpose and effect. Moreover, the present invention includes configurations in which non-essential portions of the configurations described in the embodiments are replaced. In addition, the present invention includes a configuration that achieves the same effects or achieves the same purpose as the configurations described in the embodiments. In addition, the present invention includes configurations obtained by adding known techniques to the configurations described in the embodiments.

DESCRIPTION OF SYMBOLS 1... Inspection apparatus, 10... Glass bottle, 11... Neck part, 12... Center axis, 13... Body part, 14... Bottom part, 15... Engraving, 15a... Pattern, 16... Joining line, 18... Surface foam, 18a... Surface foam shadow , 19... Mouth, 20... Light-emitting unit, 22... Light-emitting surface, 30... Mounting table, 32... Side roller, 35... Belt, 40... Imaging unit, 50... Control unit, 52... Judging unit, 53... Image processing unit , 54... Rotation detector, 60... Motor, 62... Rotation controller, 80... Image, 81... Engraving area, 82... First inspection area, 83... Second inspection area, 84... Third inspection area, 85... Pattern Search area 86 Pattern registration image 87 Mask 88 Fourth inspection area D1, D2 Distance between two lines H1 First height H2 Second height W1, W2 Overall width

Claims (4)

A method for inspecting a glass bottle having an engraving on the surface of the body, comprising:
an image acquisition step of capturing an image of the rotating glass bottle and capturing an image of the entire circumference of the body;
a masking step of masking an engraving area including a pattern derived from the engraving from the image;
a determination step of determining whether or not there is a defect in the image except for the masked engraving area;
including
a pattern position detection step of searching the image obtained in the image obtaining step using a pattern registration image created in advance based on the outline of the engraving to detect the pattern;
The masking step masks the engraving region including the pattern detected by the pattern position detecting step, and masks a plurality of inspection regions having a preset shape based on the position of the pattern detected by the pattern search. place it in the image,
The plurality of inspection areas includes a first inspection area surrounding the engraving area, a second inspection area surrounding the first inspection area, and two third inspection areas arranged to sandwich the second inspection area. an inspection region;
The third inspection area is arranged in each part where a joint line of sight appears in the image,
In the determination step, a predetermined inspection algorithm is executed for each of the first inspection area, the second inspection area, and the third inspection area to determine whether or not there is a defect;
A method of inspecting a glass bottle, wherein the inspection algorithm for the third inspection area distinguishes between a detection object and a joint line to determine whether or not there is a defect. In claim 1,
The defects include at least surface defects,
The method for inspecting a glass bottle, wherein the image acquisition step uses a line sensor to capture an image of the transmitted light that has passed through the body. In claim 1 ,
A method of inspecting a glass bottle, wherein the pattern position detecting step performs a pattern search for a predetermined height range in the image. A parison is molded from a gob with a rough mold, the parison is molded into the glass bottle with a finishing mold, and the glass bottle inspection method according to any one of claims 1 to 3 is applied to the glass bottle. A method for producing a glass bottle, characterized in that a glass bottle is obtained which has been determined to be free of the above-mentioned defects.

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