JP6774641B2 - Coating device and coating method - Google Patents

Description

The present disclosure relates to a coating apparatus and a coating method for applying an adhesive to an object to be coated.

When an adhesive is applied to an object to be coated such as a paper container and adhered, if the length, width, coating position, etc. of the adhesive deviate, the desired adhesive strength cannot be obtained, and problems such as peeling may occur. ..
In order to prevent such a problem, Patent Document 1 irradiates a paste-like object with light at an angle to photograph the paste-like object, and a bright portion and a dark portion in the captured image appear as a pair. A technique for detecting a paste-like object in a region is disclosed.

Japanese Patent No. 3041826

Patent Document 1 merely detects the presence of a paste-like object, and when the detected paste-like object deviates from the ideal length, width or position, the method for eliminating the deviation is described. Nothing is disclosed.

When applying an adhesive to a large number of objects to be coated continuously in an assembly line using an coating device, if the length, width, or coating position of the adhesive to one object to be coated deviates, it will be affected. Similar deviations may occur for all subsequent coating objects.

For example, when a hot melt adhesive is used as the adhesive, the hot melt adhesive is applied from the nozzle, but the hot melt is applied from the nozzle depending on the application time, application temperature, application pressure, etc. The amount of the adhesive changes, and the length, width, application position, etc. of the hot melt adhesive change. In particular, if the width of the adhesive is smaller than expected, the adhesive strength is weakened and peeling is likely to occur, which is not preferable.

The present disclosure provides a coating device and a coating method capable of optimizing the coating conditions of the coating object to which the adhesive is subsequently applied, based on the results of inspection of the adhesive coated on the coating object. To do.

In order to solve the above problems, according to the present disclosure, a transport unit that sequentially transports a plurality of objects to be coated and a transport unit
A coating unit for applying an adhesive to an object to be coated that passes through the first position on the transport surface of the transport unit, and a coating unit.
An imaging unit that photographs the periphery of the adhesive material applied to the object to be coated at a second position on the transport surface on the downstream side of the first position.
An inspection unit that inspects the width and coating position of the adhesive based on the image taken by the imaging unit,
Based on the inspection result of the inspection unit, a distribution unit for determining whether or not the coating object to which the adhesive is applied is defective, and
Based on the inspection result of the inspection unit, the coating condition determination unit that determines whether or not to change the coating condition of the adhesive by the coating unit, and
Provided is a coating apparatus including a coating condition setting unit for setting coating conditions of the adhesive to be coated on the coating object passing through the first position when it is determined to change the coating conditions. Will be done.

The inspection unit may inspect at least one of the length and the chip of the adhesive material in addition to the inspection of the width and the coating position of the adhesive material based on the image taken by the imaging unit.

The inspection unit sets an inspection area within a range including the ideal coating position of the adhesive in the image captured by the imaging unit.
The inspection unit may inspect the width and coating position of the adhesive within the inspection area.

The inspection unit may set the inspection area based on the reference position of the coating object in the image captured by the imaging unit.

When inspecting the width of the adhesive, the inspection unit includes a first inspection process for inspecting whether the width of the adhesive is equal to or more than a predetermined length and less than the first threshold value, and a first inspection process of the adhesive. It may have a second inspection process for inspecting whether or not the average value of the widths of the adhesive is equal to or more than the second threshold value and less than the third threshold value over the entire length.

When inspecting the length of the adhesive, the inspection unit may inspect whether the length of the adhesive is equal to or greater than the fourth threshold value and less than the fifth threshold value.

When inspecting the presence or absence of chipping of the adhesive, the inspection unit may inspect whether or not the adhesive in the inspection area is separated into two or more.

When inspecting the position of the adhesive, the inspection unit may inspect whether or not the adhesive protrudes from the inspection area.

When the coating condition setting unit determines that the coating conditions are changed, even if at least one of the coating pressure, the coating time, and the coating temperature of the adhesive material coated from the coating unit is changed. Good.

When changing the width of the adhesive material, the coating condition setting unit may change at least one of the coating pressure and the coating temperature of the adhesive material applied from the coating material.

When changing the length of the adhesive material, the coating condition setting unit may change at least one of the coating time and the coating temperature of the adhesive material applied from the coating material.

In another aspect of the present disclosure, a plurality of objects to be coated are sequentially conveyed.
An adhesive is applied to the object to be coated that passes through the first position on the transport surface.
The periphery of the adhesive material applied to the object to be coated was photographed at a second position on the transport surface on the downstream side of the first position.
Based on the captured image, the width and coating position of the adhesive are inspected and
Based on the inspection result, it is determined whether or not the object to be coated to which the adhesive is applied is defective.
Based on the inspection result, it is determined whether or not to change the application conditions of the adhesive.
When it is determined that the coating conditions are to be changed, a coating method is provided in which the coating conditions of the adhesive to be applied to the coating object passing through the first position are set thereafter.

According to the present disclosure, it is possible to optimize the coating conditions of the coating object to which the adhesive is subsequently applied, based on the result of inspecting the adhesive applied to the coating object.

The schematic plan view which shows the schematic structure of the coating apparatus 1 by one Embodiment of this disclosure. A schematic plan view of a main part of the coating device 1 of FIG. 1 as viewed from the direction of arrow A in FIG. (A) is a diagram showing an example of a photographed image of the object to be coated, (b) is a diagram showing an image area including a reference point of the object to be coated with a broken line frame, and (c) is two in the photographed image of the object to be coated. The figure which shows the example which sets one inspection area. The figure which shows the strip-shaped linear area in the direction along one side of the inspection area. The schematic diagram which shows an example of the structure of a photographing part. The flowchart which shows an example of the whole processing procedure of the coating apparatus by this embodiment. A detailed flowchart of steps S4, S8 and S9 of FIG. (A) and (b) are diagrams for explaining the inspection process of the width of the adhesive. The figure explaining the inspection process of the length of an adhesive. The figure explaining the inspection process for the presence or absence of chipping of an adhesive material. The figure explaining the inspection process of the misalignment of an adhesive material. The flowchart which shows an example of the processing procedure of the narrowing inspection of FIG. 8A. The flowchart which shows an example of the processing procedure of the width average inspection of FIG. 8B. The flowchart which shows an example of the inspection process of the length of the adhesive shown in FIG. FIG. 5 is a flowchart showing an example of an inspection process for the presence or absence of chipping of the adhesive shown in FIG. The flowchart which shows an example of the inspection process of the misalignment of the adhesive 24 shown in FIG.

Hereinafter, one embodiment of the present disclosure will be described in detail. FIG. 1 is a schematic plan view showing a schematic configuration of a coating device 1 according to an embodiment of the present disclosure. The coating device 1 of FIG. 1 applies an adhesive to a coating object made of, for example, a fan-shaped paper container to form a conical adhesive body. The shape and material of the object to be coated are not particularly limited. The object to be coated may not be a paper container, but may be a sheet member made of, for example, resin or metal. Further, although the application of the adhesive material for forming the conical adhesive body will be described below, the form of the adhesive body does not necessarily have to be conical.

The coating device 1 of FIG. 1 includes a transport unit 2, a coating unit 3, an imaging unit 4, an inspection unit 5, a distribution unit 6, a coating condition determination unit 7, and a coating condition setting unit 8. There is. In addition, the coating device 1 of FIG. 1 may include a charging unit 9, a bonding unit 10, a non-defective product loading unit 11, and a defective product discharging unit 12, if necessary.

For example, the transport unit 2 takes out the objects to be coated one by one from the charging section 9 loaded with a large number of objects to be coated and places them on the transport surface. The transport surface is movable in one direction, for example, and each coating object placed on the transport surface is sequentially transported in the moving direction of the transport surface.

In the example of FIG. 1, the transport unit 2 is divided into a first transport unit 2a and a second transport unit 2b. It is optional whether or not the transport unit 2 is divided. The first transport section 2a transports the object to be coated from the charging section 9 to the bonding section 10. The second transport unit 2b transports the adhesive body adhered by the bonding portion 10 to the non-defective product loading unit 11 or the defective product discharging unit 12. When the first transport portion 2a and the second transport portion 2b are arranged apart from each other, for example, from the first transport portion 2a to the second transport portion 2b, the adhesive body is formed by using the air pressure by air. You may fly from 1 transport part 2a to the air and carry to the second transport part 2b. The method of delivering the adhesive between the first transport section 2a and the second transport section 2b is arbitrary.

The coating unit 3 applies the adhesive to the object to be coated that passes through the first position on the transport surface. The specific material of the adhesive is not limited, but an example of using a hot melt adhesive as the adhesive will be mainly described below.

The photographing unit 4 photographs the periphery of the adhesive material applied to the object to be coated at the second position on the downstream side of the first position on the transport surface. As will be described later, the photographing unit 4 has a line camera, a telecentric lens, and a lighting device, and takes a picture with the line camera in a state where the lighting device illuminates the periphery of the adhesive material of the object to be coated.

The inspection unit 5 inspects at least the width and the coating position of the adhesive material based on the image taken by the photographing unit 4. The inspection unit 5 extracts the adhesive material contained in the photographed image by image processing, and detects the width and the coating position of the adhesive material. Alternatively, the captured image may be displayed on a display device (not shown), and the operator may visually grasp the adhesive from the captured image and detect the width and coating position of the adhesive. In this way, all the processing of the inspection unit 5 may be automated, or at least a part of the processing of the inspection unit 5 may be visually performed by the operator.

As will be described later, the inspection unit 5 may inspect the length of the adhesive and the presence or absence of chips in addition to the width and coating position of the adhesive.

The distribution unit 6 determines whether or not the object to be coated to which the adhesive is applied is defective based on the inspection result by the inspection unit 5, and if it is a non-defective product, it is conveyed to the non-defective product loading unit 11, and if it is a defective product. For example, it is transported to the defective product discharging unit 12. When the non-defective product loading unit 11 is arranged away from the second transport unit 2b, for example, using air pressure by air, the adhesive is blown from the second transport unit 2b into the air to reach the non-defective product loading unit 11. It may be transported. On the other hand, when the inspection unit 5 determines that the product is defective, the product is transported to the end of the second transport unit 2b, and the adhesive is stored in the defective product discharge unit 12 provided at the end. When the adhesive body has a conical shape, for example, the non-defective product loading unit 11 stacks the adhesive bodies in the same direction. This makes it possible to load a large number of adhesive bodies in a narrow space.

In the coating device 1 of FIG. 1, even if the coating object is determined to be defective by the inspection unit 5, the coating object is adhered to the bonding portion 10 to form an adhesive body. As a modification, the object to be coated, which is determined to be a defective product, may be discharged without being adhered by the bonding portion 10.

The coating condition determination unit 7 determines whether or not to change the coating condition of the adhesive by the coating unit 3 based on the inspection result of the inspection unit 5. The coating conditions are the coating time, the coating temperature, the coating pressure, and the like of the adhesive material coated from the coating portion 3. The coating condition determination unit 7 determines whether or not to change the coating conditions for the object to be coated before the adhesive material is coated, which is conveyed by the transport unit 2.

When the coating condition setting unit 8 determines that the coating condition is changed, the coating condition setting unit 8 sets the coating condition of the adhesive to the object to be coated that passes through the first position on the transport surface thereafter. The coating condition setting unit 8 newly sets the coating conditions such as the coating time, the coating temperature, and the coating pressure of the adhesive based on the inspection result of the inspection unit 5. More specifically, the coating condition setting unit 8 sets the coating conditions so that the width, length and coating position of the adhesive to be coated on the object to be coated approach the values assumed in advance.

For example, when the width of the adhesive material applied to the object to be coated is too narrow, the coating condition setting unit 8 increases the coating pressure of the adhesive material applied from the nozzle described later. Alternatively, the width of the adhesive can be increased by increasing the coating temperature. Further, the coating condition setting unit 8 controls to lengthen the coating time of the adhesive coated from the nozzle when the length of the adhesive coated on the object to be coated is too short or there is a chip. At least one of the control to raise the coating temperature of the adhesive is performed. Further, the coating condition setting unit 8 controls the timing of applying the adhesive from the nozzle when the coating position of the adhesive is deviated.

FIG. 2 is a schematic plan view of a main part of the coating device 1 of FIG. 1 as viewed from the direction of arrow A in FIG. FIG. 2 shows the charging section 9 to the bonding section 10. As shown in FIG. 2, the coating objects 21 taken out one by one from the charging section 9 are conveyed on the conveying surface 22 and adhered at the first position from the nozzle 23 of the coating device 1. The material (eg, hot melt adhesive) 24 is applied.

The coating unit includes a nozzle 23 for applying the hot melt adhesive 24 and a coating control unit 25 for controlling the application conditions of the hot melt adhesive 24 applied from the nozzle 23. The coating control unit 25 sets the coating conditions such as the coating time, the coating temperature, and the coating pressure of the hot melt adhesive 24 coated from the nozzle 23 according to the coating conditions set by the coating condition setting unit 8. Control.

In the present embodiment, the coating conditions of the subsequent coating target 21 are set based on the inspection result of the coating target 21 to which the adhesive 24 is coated first. Therefore, it is necessary to set the coating conditions of the coating object 21 to which the adhesive 24 is first applied as an initial value in advance.

The coating object 21 for which the application of the adhesive material 24 has been completed is photographed by the photographing unit 4 at the second position on the downstream side of the first position, and the inspection unit 5 applies the adhesive material 24 using the photographed image. Inspect the condition.

FIG. 3A is a diagram showing an example of a photographed image of the object to be coated 21. The inspection unit 5 first detects the reference point 21a of the coating object 21 included in the photographed image. In FIG. 3B, the image region including the reference point 21a of the object to be coated 21 is shown by the broken line frame 21b. The reference point 21a of the object to be coated 21 is a feature point on the shape such as a protrusion or a protrusion. Next, as shown in FIG. 3C, the inspection unit 5 sets an inspection area 26 of a predetermined size at a place separated from the reference point 21a in the captured image in a predetermined two-dimensional direction. In the example of FIG. 3C, two inspection regions 26 are set in the captured image of the object to be coated 21. The inspection area 26 is an area where the adhesive material 24 is arranged, and the inspection unit 5 detects an image of the adhesive material 24 in the inspection area 26, and the width, length, presence / absence of chipping, and coating of the adhesive material 24 are applied. Inspect the position etc.

As shown in FIG. 3C, when the adhesive material 24 is applied to a plurality of locations of the object to be coated 21, an inspection region 26 is set separately for each location to which the adhesive material 24 is applied. That is, one inspection area 26 is provided so as to correspond to one adhesive material 24.

As shown in FIG. 4, the photographing unit 4 photographs an image of the strip-shaped linear region 26a in the direction along one side of the inspection region 26. As shown in FIG. 4, the longitudinal direction x of the linear region 26a is a direction intersecting the longitudinal direction y of the adhesive material 24. Although the position of the photographing unit 4 is fixed, the transport surface 22 of the transport unit 2 is moving in one direction. Therefore, the photographing unit 4 repeatedly shoots according to the moving speed of the transport surface 22. The inspection area 26 can be divided into a plurality of linear areas 26a, and an image can be taken for each of the linear areas 26a.

The line camera of the photographing unit 4 is a line camera in which a plurality of imaging sensors are linearly arranged so that one linear region 26a can be photographed in one shooting.

The adhesive 24 such as the hot melt adhesive 24 has a color close to transparent or a unique color. Therefore, depending on the brightness of the surroundings, the adhesive material 24 may not be clearly captured in the captured image of the photographing unit 4. Therefore, it is desirable that the photographing unit 4 takes a picture while illuminating with an illuminating device having an illumination color matching the color of the adhesive 24. For example, when the hot melt adhesive 24 is yellow, the hot melt adhesive 24 can be projected more clearly by changing the illumination color to a bluish color.

The captured image of the photographing unit 4 does not have to be in color. In the present embodiment, an image around the adhesive material 24 is obtained in order to inspect the length, width, presence / absence of chipping, and position of the adhesive material 24 applied to the object to be coated 21. Therefore, the image may be a monochrome image as long as the presence of the adhesive 24 can be seen by the shade (gradation difference).

FIG. 5 is a schematic view showing an example of the configuration of the photographing unit 4. As shown in FIG. 5, the photographing unit 4 includes a line camera 31, a telecentric lens 32, and a lighting device 33. The lighting device 33 has a plurality of lighting lamps 34 that illuminate a direction inclined with respect to the optical axis 31a of the line camera 31, and each lighting lamp 34 is an adhesive material 24 of an object to be coated 21 on a transport surface 22. Illuminate the area around the application position. The reflectance and transmittance of the illumination light of the illumination lamp 34 differ depending on the material of the adhesive material 24. Therefore, the function f1 for rotating the illumination lamp 34 so that the optical axis of the illumination lamp 34 can be changed, the function f2 for adjusting the distance between the illumination lamp 34 and the transport surface 22, and the illumination lamp 34 along the transport surface 22. It is desirable to provide a function f3 or the like for moving in the direction. Further, the function f4 for adjusting the distance between the line camera 31 and the transport surface 22 may be provided. Focus adjustment can be performed by adjusting the distance between the line camera 31 and the transport surface 22.

The telecentric lens 32 arranged close to the line camera 31 is for performing optical adjustment so that the image size captured by the line camera 31 does not fluctuate even if the height of the transport surface 22 is raised or lowered.

As shown in FIG. 4, the inspection region 26 includes a large number of linear regions 26a, which are units taken by the photographing unit 4. The inspection unit 5 does not need to inspect the captured image for each linear region 26a in the inspection region 26. When the number of linear regions 26a is enormous, the width, length, chipping, etc. of the adhesive 24 may be inspected based on the captured image of a part of the linear regions 26a in the inspection region 26. More specifically, the width, length, chipping, etc. of the adhesive 24 may be inspected based on the captured image of the linear region 26a at predetermined intervals in the inspection region 26.

FIG. 6 is a flowchart showing an example of the overall processing procedure of the coating apparatus 1 according to the present embodiment. First, the object to be coated 21 is placed on the transfer surface 22 of the transfer unit 2 (step S1), and the transfer surface 22 is moved to start the transfer of the object to be coated 21 (step S2).

Next, when the object to be coated 21 reaches the first position, the coating portion 3 applies the adhesive 24 to the object 21 to be coated (step S3). After that, when the object to be coated 21 coated with the adhesive 24 reaches the second position, the periphery of the adhesive 24 is photographed by the line camera 31, and the photographed image is used by the inspection unit 5 to photograph the adhesive 24. Width, length, presence of chips, coating position, etc. are inspected (step S4).

After that, when the object to be coated 21 after photographing reaches the bonding portion 10, the adhesive force of the adhesive material 24 is used to form an adhesive body in which the object to be coated 21 is rolled into a conical shape (step S5). After that, the adhesive body is transported from the first transport unit 2a to the second transport unit 2b by, for example, air (step S6). Next, based on the inspection result in step S4, the distribution unit 6 distributes the adhesive to the non-defective product loading unit 11 or the defective product discharging unit 12 (step S7).

In parallel with the process of steps S5 to S7 described above, or after the process of step S7 is completed, the coating condition determination unit 7 applies the adhesive material 24 by the coating unit 3 based on the inspection result of the inspection unit 5. It is determined whether or not to change the condition (step S8). When it is determined that the coating conditions are to be changed, the coating condition setting unit 8 sets new coating conditions (step S9), and repeats the processes after step S3. If it is determined in step S8 that the coating conditions are not changed, the treatments from step S3 onward are repeated with the same coating conditions as before, and the adhesive 24 is sequentially applied to a plurality of objects to be coated.

The processing of the bonding unit 10 and the distribution unit 6 can be performed in parallel with the processing of the inspection unit 5, the coating condition determination unit 7, and the coating condition setting unit 8. Therefore, as described above, the processes of steps S5 to S7 in FIG. 6 and the processes of steps S8 to S9 can be performed in parallel.

FIG. 7 is a detailed flowchart of steps S4, S8 and S9 of FIG. When the object to be coated 21 reaches the second position, the inspection unit 5 sets the inspection area 26 in the image captured by the imaging unit 4 (step S11). Next, the inspection unit 5 extracts the adhesive material 24 existing in the inspection area 26, measures the width, length, and coating position of the adhesive material 24, and inspects the adhesive material 24 based on the measurement result ( Step S12). Next, the coating condition determination unit 7 determines whether or not to change the coating conditions of the adhesive 24 based on the inspection result and the measurement result in step S12 (step S13). If the coating conditions are not changed, the process of FIG. 7 is completed, and when the coating conditions are changed, the coating condition determination unit 7 applies the adhesive 24 as expected based on the inspection results of the inspection unit 5. The coating time, coating temperature, and coating pressure of the adhesive 24 required for the above are calculated (step S14). Next, the coating condition setting unit 8 corrects (sets) the coating condition including at least one of the coating time, the coating temperature, and the coating pressure based on the calculation result in step S14 (step S15). The coating unit 3 adjusts the nozzle 23 based on the coating conditions corrected in step S15 to apply the adhesive 24.

8 to 11 are diagrams for explaining a specific example of the inspection process of the inspection unit 5. The inspection unit 5 inspects whether or not there is a problem in the shape of the adhesive 24 applied to the object to be coated 21 based on the image taken by the photographing unit 4. The inspection process performed by the inspection unit 5 includes an inspection of the width of the adhesive 24 shown in FIG. 8, an inspection of the length of the adhesive 24 shown in FIG. 9, and an inspection of the presence or absence of the adhesive 24 shown in FIG. , Including the inspection of the misalignment of the adhesive 24 shown in FIG.

It should be noted that the inspection unit 5 does not necessarily have to perform all the inspection processes of FIGS. 8 to 11, but at least the inspection of the width of the adhesive 24 of FIG. 8 and the inspection of the misalignment of the adhesive 24 of FIG. 11 are It is desirable to do it. Further, when the inspection unit 5 performs the inspection processes of FIGS. 8 to 11, the order of the inspection processes is arbitrary. Further, at least a part of the inspection processes may be performed in parallel.

The width inspection of the adhesive material 24 includes a width narrowing inspection (first inspection process) shown in FIG. 8 (a) and a width average inspection (second inspection process) shown in FIG. 8 (b). I'm out.

FIG. 12 is a flowchart showing an example of the processing procedure of the narrowing inspection of FIG. 8A. First, the width of the adhesive 24 is detected based on the image captured by the photographing unit 4 (step S21). It is not necessary to perform the process of step S21 for all the linear regions 26a photographed by the photographing unit 4, and among all the linear regions 26a photographed by the photographing unit 4, a plurality of linear regions 26a are photographed at predetermined intervals. The width of the adhesive 24 may be detected based on the image. Thereby, the portion where the width is narrowed and the length thereof can be specified along the longitudinal direction of the adhesive material 24.

Next, it is determined whether or not the width of the adhesive material 24 detected in step S21 is less than the first threshold value over a continuous predetermined length or more (step S22).

If the determination in step S22 is YES, it is determined that a part of the adhesive material 24 is narrowed, and the adhesive material 24 is determined to be NG (defective product) (step S23). On the other hand, when the determination in step S2 is NO, it is determined that the width reduction of the adhesive material 24 has not occurred, and it is determined that the adhesive material 24 is OK (the width reduction has not occurred) (step S24).

According to the process of FIG. 12, when the width of a part of the adhesive 24 is too narrow, it can be determined as a defective product.

FIG. 13 is a flowchart showing an example of the processing procedure of the width average inspection of FIG. 8B. First, the width of the adhesive material 24 is detected for each linear region 26a photographed by the photographing unit 4 (step S31). Also in this step S31, the width of the adhesive 24 may be detected based on the captured images of the plurality of linear regions 26a taken at predetermined intervals among all the linear regions 26a photographed by the photographing unit 4.

Next, the average value of the widths of the adhesive 24 detected in step S11 is calculated over the entire length of the adhesive 24 (step S32). Next, it is determined whether or not the average value calculated in step S32 is equal to or greater than the second threshold value and less than the third threshold value (step S33). If YES is determined in step S33, the adhesive 24 is determined to be OK (no narrowing has occurred) (step S34), and if NO is determined in step S33, the adhesive 24 is NG (defective product). (Step S35).

According to the process of FIG. 13, when the average width of the adhesive 24 is too thick or too thin, it can be determined as a defective product.

FIG. 14 is a flowchart showing an example of the length inspection process of the adhesive material 24 shown in FIG. The adhesive 24 in the inspection area 26 is extracted from the image captured by the photographing unit 4 (step S41). Next, the distance between both ends of the adhesive material 24 in the longitudinal direction is detected (step S42). Next, it is determined whether or not the distance detected in step S42 is equal to or greater than the fourth threshold value and less than the fifth threshold value (step S43). If step S23 is NO, it is determined that the adhesive material 24 is NG (defective product) (step S44), and if it is YES, it is determined that the adhesive material 24 is OK (has an appropriate length) (step S45). ..

According to the process of FIG. 14, when the adhesive 24 is too long as shown in FIG. 9A, when it is too short as shown in FIG. 9B, or when the adhesive 24 is too short as shown in FIG. 9C. If it is interrupted in the middle, it can be judged as defective.

FIG. 15 is a flowchart showing an example of an inspection process for the presence or absence of chipping of the adhesive 24 shown in FIG. The adhesive 24 in the inspection area 26 is extracted from the image captured by the photographing unit 4 (step S51). Next, the number of the adhesive 24 existing in the inspection area 26 is measured (step S52). It is determined whether or not the number of the adhesive 24 measured in step S52 is 2 or more (step S53), and if it is 2 or more, it is determined that the adhesive 24 is chipped and it is determined to be NG (defective product). (Step S54). If the number of the adhesive 24 is one, it is determined that it is OK (no chipping has occurred) (step S55).

Due to the processing of FIG. 15, the defect that the adhesive 24 is cut off in the middle as shown in FIG. 10A, the defect that the adhesive 24 is not applied as expected as shown in FIG. 10B, and the defect of FIG. It is possible to inspect a defect in which the adhesive material 24 itself is not applied as shown in (c) and a defect in which the adhesive material 24 is applied outside the inspection area 26 as shown in FIG. 10D.

FIG. 16 is a flowchart showing an example of the inspection process of the positional deviation of the adhesive 24 shown in FIG. The adhesive 24 in the inspection area 26 is extracted from the image captured by the photographing unit 4 (step S61). Next, it is determined whether or not the extracted adhesive 24 protrudes from the inspection area 26 (step S62). As shown in FIG. 11 (a), if the adhesive 24 does not protrude from the inspection area 26, it is determined that it is OK (no misalignment has occurred) (step S63), and as shown in FIG. 11 (b). If the adhesive material 24 protrudes from the inspection area 26, it is determined to be NG (defective product) (step S64).

As described above, in the present embodiment, the adhesive material 24 is applied to the coating object 21 while being conveyed by the conveying unit 2, and then the periphery of the adhesive material 24 applied to the coating object 21 is photographed. The image taken by the photographing unit 4 is photographed, the image captured by the photographing unit 4 is analyzed to determine whether or not to change the coating conditions of the adhesive 24, and when the coating conditions are changed, the coating target to be conveyed thereafter is transferred. The adhesive 24 is applied to the object 21 under new application conditions. As a result, when the adhesive material 24 is applied to a plurality of objects to be coated 21 by an assembly line, the deviation of the width and the coating position of the adhesive material 24 can be corrected at any time to the extent that it is not judged to be defective. Can be suppressed.

Further, in the present embodiment, when the width, length, presence / absence of chipping, coating position, and the like of the adhesive material 24 become large, the adhesive material 24 to the subsequent coating object 21 is not stopped by the transport unit 2. Productivity is improved because the coating conditions can be changed.

Aspects of the present invention are not limited to the individual embodiments described above, but also include various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the contents described above. That is, various additions, changes and partial deletions are possible without departing from the conceptual idea and purpose of the present invention derived from the contents defined in the claims and their equivalents.

At least a part of the coating apparatus 1 and the coating method described in the above-described embodiment may be configured by hardware or software. When configured by software, a program that realizes at least a part of the functions of the coating device 1 and the coating method may be stored in a recording medium such as a flexible disk or a CD-ROM, read by a computer, and executed. The recording medium is not limited to a removable one such as a magnetic disk or an optical disk, and may be a fixed recording medium such as a hard disk device or a memory.

Further, a program that realizes at least a part of the functions of the coating device 1 and the coating method may be distributed via a communication line (including wireless communication) such as the Internet. Further, the program may be encrypted, modulated, compressed, and distributed via a wired line or wireless line such as the Internet, or stored in a recording medium.

1 Coating device, 2 Transport section, 3 Coating section, 4 Imaging section, 5 Inspection section, 6 Sorting section, 7 Coating condition judgment section, 8 Coating condition setting section, 9 Input section, 10 Bonding section, 11 Non-defective product loading section , 12 Defective product discharge part, 21 Coating object, 22 Conveying surface, 23 Nozzle, 24 Adhesive (hot melt adhesive), 25 Coating control unit, 26 Inspection area, 31 Line camera, 32 Telecentric lens, 33 Lighting device

Claims (13)

A transport unit that sequentially transports multiple objects to be applied,
A coating unit for applying an adhesive to an object to be coated that passes through the first position on the transport surface of the transport unit, and a coating unit.
An imaging unit that photographs the periphery of the adhesive material applied to the object to be coated at a second position on the transport surface on the downstream side of the first position.
An inspection unit that inspects the width and coating position of the adhesive based on the image taken by the imaging unit,
Based on the inspection result of the inspection unit, a distribution unit for determining whether or not the coating object to which the adhesive is applied is defective, and
Based on the inspection result of the inspection unit, the coating condition determination unit that determines whether or not to change the coating condition of the adhesive by the coating unit, and
When it is determined that the coating conditions are to be changed, a coating condition setting unit for setting the coating conditions of the adhesive to be coated on the coating object passing through the first position after that is provided.
When inspecting the width of the adhesive, the inspection unit includes a first inspection process for inspecting whether the width of the adhesive is less than the first threshold over a predetermined length or more, and a first inspection process of the adhesive. A coating apparatus having a second inspection process for inspecting whether or not the average value of the widths of the adhesive is equal to or more than a second threshold value and less than a third threshold value over the entire length. A transport unit that sequentially transports multiple objects to be applied,
A coating unit for applying an adhesive to an object to be coated that passes through the first position on the transport surface of the transport unit, and a coating unit.
An imaging unit that photographs the periphery of the adhesive material applied to the object to be coated at a second position on the transport surface on the downstream side of the first position.
Based on the image taken by the photographing unit, the inspection unit that inspects the width , coating position , and presence / absence of chipping of the adhesive , and
Based on the inspection result of the inspection unit, a distribution unit for determining whether or not the coating object to which the adhesive is applied is defective, and
Based on the inspection result of the inspection unit, the coating condition determination unit that determines whether or not to change the coating condition of the adhesive by the coating unit, and
When it is determined that the coating conditions are to be changed, a coating condition setting unit for setting the coating conditions of the adhesive to be coated on the coating object passing through the first position after that is provided.
The inspection unit sets an inspection area within the range including the ideal coating position of the adhesive in the image taken by the photographing unit, and the width and coating position of the adhesive within the inspection area. A coating device for inspecting whether or not the adhesive material in the inspection area is separated into two or more when inspecting the presence or absence of chipping of the adhesive material. A transport unit that sequentially transports multiple objects to be applied,
A coating unit for applying an adhesive to an object to be coated that passes through the first position on the transport surface of the transport unit, and a coating unit.
An imaging unit that photographs the periphery of the adhesive material applied to the object to be coated at a second position on the transport surface on the downstream side of the first position.
An inspection unit that inspects the width , coating position , and length of the adhesive based on the image taken by the imaging unit.
Based on the inspection result of the inspection unit, a distribution unit for determining whether or not the coating object to which the adhesive is applied is defective, and
Based on the inspection result of the inspection unit, the coating condition determination unit that determines whether or not to change the coating condition of the adhesive by the coating unit, and
When it is determined that the coating conditions are to be changed, a coating condition setting unit for setting the coating conditions of the adhesive to be coated on the coating object passing through the first position after that is provided.
When it is determined that the coating condition is changed, the coating condition setting unit changes at least one of the coating pressure, the coating time, and the coating temperature of the adhesive material coated from the coating unit, and the coating condition setting unit changes the coating condition. A coating device that changes at least one of the coating time and the coating temperature of the adhesive coated from the coating portion when the length of the adhesive is changed. The inspection unit sets an inspection area within a range including the ideal coating position of the adhesive in the image captured by the imaging unit.
The coating device according to claim 1, wherein the inspection unit inspects the width and coating position of the adhesive within the inspection region. The inspection unit sets an inspection area within a range including the ideal coating position of the adhesive in the image captured by the imaging unit.
The coating device according to claim 3, wherein the inspection unit inspects the width, coating position, and length of the adhesive within the inspection region. The coating device according to claim 2 or 5, wherein the inspection unit sets the inspection area based on a reference position of the coating object in an image captured by the photographing unit. The coating according to claim 3, wherein the inspection unit inspects whether or not the length of the adhesive is equal to or greater than the fourth threshold and less than the fifth threshold when inspecting the length of the adhesive. apparatus. The coating apparatus according to claim 2, wherein the inspection unit inspects whether or not the adhesive material in the inspection area is separated into two or more when inspecting the presence or absence of chipping of the adhesive material. .. The coating device according to claim 2, 5 or 6, wherein the inspection unit inspects whether or not the adhesive material protrudes from the inspection area when inspecting the position of the adhesive material. The coating device according to claim 3, wherein the coating condition setting unit changes at least one of the coating pressure and the coating temperature of the adhesive coated from the coating portion when the width of the adhesive is changed. Transport multiple objects to be applied in sequence
An adhesive is applied to the object to be coated that passes through the first position on the transport surface.
At a second position on the transport surface on the downstream side of the first position, the periphery of the adhesive material applied to the object to be coated was photographed.
Based on the captured image, the width and coating position of the adhesive are inspected and
Based on the inspection result, it is determined whether or not the object to be coated to which the adhesive is applied is defective.
Based on the inspection result, it is determined whether or not to change the application conditions of the adhesive.
When it is determined that the coating conditions are changed, the coating conditions of the adhesive to be applied to the coating object passing through the first position after that are set.
When inspecting the width of the adhesive, the first inspection process for inspecting whether the width of the adhesive is equal to or more than a predetermined length and less than the first threshold value, and the adhesive over the entire length of the adhesive. A coating method for performing a second inspection process for inspecting whether or not the average value of the widths of is equal to or greater than the second threshold value and less than the third threshold value. Transport multiple objects to be applied in sequence
An adhesive is applied to the object to be coated that passes through the first position on the transport surface.
At a second position on the transport surface on the downstream side of the first position, the periphery of the adhesive material applied to the object to be coated was photographed by a photographing unit.
Based on the captured image, the width of the adhesive , the coating position , and the presence or absence of chips are inspected.
Based on the inspection result, it is determined whether or not the object to be coated to which the adhesive is applied is defective.
Based on the inspection result, it is determined whether or not to change the application conditions of the adhesive.
When it is determined that the coating conditions are changed, the coating conditions of the adhesive to be applied to the coating object passing through the first position after that are set.
An inspection area within a range including the ideal coating position of the adhesive is set in the image taken by the photographing unit, and the width and the coating position of the adhesive are inspected in the inspection area. A coating method for inspecting whether or not the adhesive material in the inspection area is separated into two or more when inspecting the presence or absence of chipping of the adhesive material. Transport multiple objects to be applied in sequence
An adhesive is applied at the coating part to the object to be coated that passes through the first position on the transport surface.
At a second position on the transport surface on the downstream side of the first position, the periphery of the adhesive material applied to the object to be coated was photographed.
Based on the captured image, the width , application position , and length of the adhesive are inspected and
Based on the inspection result, it is determined whether or not the object to be coated to which the adhesive is applied is defective.
Based on the inspection result, it is determined whether or not to change the application conditions of the adhesive.
When it is determined that the coating conditions are changed, the coating conditions of the adhesive to be applied to the coating object passing through the first position after that are set.
When it is determined that the coating conditions are changed, at least one of the coating pressure, the coating time, and the coating temperature of the adhesive to be coated from the coating portion is changed.
A coating method in which at least one of the coating time and the coating temperature of the adhesive to be coated from the coating portion is changed when the length of the adhesive is changed.

Images