Coating inspection device, coating apparatus, and coating inspection method

Abstract

To provide a coating inspection device, a coating apparatus, and a coating inspection method capable of quantitatively determining a failure of a coating position without wasting a workpiece.SOLUTION: The imaging unit 4 images the plate 9 on which the coating agent 101 is discharged by the coating unit 5 and the coating balls 12A to 12E are formed. A control part 7 inspects the application part 5 based on the image of the plate 9 imaged by the imaging part 4. A reference shape 91 is formed on the surface of the plate 9. The control unit 7 determines the failure of the application position based on the comparison between the center position of the reference shape 91 and the center positions of the application balls 12A to 12E.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a coating inspection device, a coating device, and a coating inspection method. [Background technology]

[0002] Electric wires with terminals have been proposed for use in communication between devices mounted on vehicles and for power supply, etc. Generally, this type of electric wire with terminals has a structure in which terminals are crimped to both ends of the electric wire, and both terminals are accommodated in terminal accommodating chambers of corresponding connector housings. Each connector is then connected to a mating connector of the corresponding device, etc. Furthermore, for example, in one conventional electric wire with terminals (work), the bundle of wires exposed from the end of the electric wire is covered with an anticorrosive agent (coating agent) to prevent corrosion at the crimped joint between the electric wire and the terminal (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-129067 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if there is a discrepancy between the desired application position of the anticorrosive agent and the actual application position, the wire bundle cannot be covered with the anticorrosive agent accurately. Conventionally, the application position of the actually manufactured electric wire (workpiece) was inspected visually. This resulted in the manufacture of electric wires with the application position misaligned, resulting in wasted electric wire. Another issue was that the accuracy of the application position could not be quantitatively determined.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and its purpose is to provide a coating inspection device, a coating device, and a coating inspection method that can quantitatively determine defects in the coating position without wasting the workpiece. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the coating inspection device according to the present invention has the following features. An application inspection device that inspects an application unit that applies an application agent, an imaging unit that images a plate on which the coating agent is discharged by the coating unit and a coating droplet is formed; a coating inspection unit that inspects the coating unit based on an image of the plate captured by the imaging unit, The plate has a reference shape formed on its surface, the application inspection unit determines whether the application position is defective based on a comparison between the center position of the reference shape and the center position of the application ball. It is a coating inspection device.

[0007] In order to achieve the above-mentioned object, the coating device according to the present invention has the following features. a transport unit that transports the workpiece; an imaging unit that images the workpiece transported by the transport unit; an application unit that applies a coating agent to the workpiece transported by the transport unit; A first application control unit that determines an application position of the coating agent based on a captured image of the workpiece and controls the application unit to apply the coating agent to the determined application position. A coating device comprising: a plate detachably attached to the transport unit and transported by the transport unit; a second coating control unit that, when set to an inspection mode, controls the coating unit to discharge the coating agent and form a coating droplet on the plate; a transport control unit that controls the transport unit to transport the plate on which the coating beads are formed to the imaging unit; a coating inspection unit that inspects the coating unit based on an image of the plate captured by the imaging unit, The plate has a reference shape formed on its surface, the application inspection unit determines whether the application position is defective based on a comparison between the center position of the reference shape and the center position of the application ball. It is a coating device.

[0008] In order to achieve the above-mentioned object, the coating inspection method according to the present invention is characterized as follows. A coating inspection method for inspecting an application unit that applies a coating agent, comprising: an imaging step of imaging a plate on which a coating droplet is formed by discharging the coating agent from the coating unit; an inspection step of inspecting the application unit based on the captured image of the plate, The plate has a reference shape formed on its surface, In the inspection step, a defect in the coating position is determined based on a comparison between the center position of the reference shape and the center position of the coating ball. It is a coating inspection method. [Effects of the Invention]

[0009] The coating inspection device, coating device, and coating inspection method according to the present invention have the advantage of being able to quantitatively determine defects in the coating position without wasting the workpiece.

[0010] The present invention has been briefly described above. The details of the present invention will become clearer by reading the following detailed description of the invention (hereinafter referred to as "embodiments") with reference to the accompanying drawings. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a block diagram showing an embodiment of a coating apparatus incorporating a coating inspection device of the present invention. [Figure 2] FIG. 2 is a rear view of the conveying section shown in FIG. [Figure 3] FIG. 3 is a top view of the transport unit shown in FIG. [Figure 4] FIG. 4 is a perspective view of the imaging unit shown in FIG. [Figure 5] FIG. 5 is an exploded perspective view of the mounting jig shown in FIG. [Figure 6] 6 is a perspective view of the mounting jig shown in FIG. 1 as seen from below. [Figure 7] FIG. 7 is a flowchart showing a processing procedure in the inspection mode of the control unit shown in FIG. 1 in the first embodiment. [Figure 8] FIG. 8 is a non-defective image of a coated droplet formed on a plate, captured by the imaging unit shown in FIG. [Figure 9] FIG. 9 is an image of a defective coated ball formed on a plate, captured by the imaging unit shown in FIG. [Figure 10] FIG. 10 is an image of a defective coated ball formed on a plate, captured by the imaging unit shown in FIG. [Figure 11] FIG. 11 is a flowchart showing a processing procedure in the inspection mode of the control unit shown in FIG. 1 in the second embodiment. [Figure 12] FIG. 12 is an explanatory diagram for explaining details of S14 in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0013] For the sake of convenience, the following definitions are used for the terms "front," "rear," "left," "right," "upper," and "lower" as shown in Figures 1 to 12. The "front-rear direction," "left-right direction," and "up-down direction" are perpendicular to one another. The "left-right direction" corresponds to the "first direction" and "side-up direction" of the present invention, and the "front-rear direction" corresponds to the "second direction" and "longitudinal direction" of the present invention.

[0014] (First embodiment) FIG. 1 is a block diagram showing one embodiment of an applicator 1 incorporating an application inspection device of the present invention. The applicator 1 shown in FIG. 1 is an apparatus that applies a coating material 101 made of a UV-curable resin to an end of a terminal-attached electric wire 10 (workpiece). The terminal-attached electric wire 10 includes an electric wire 102 and a terminal 103 attached to the end of the electric wire 102. The electric wire 102 has a coating 102A stripped from the end to expose a wire bundle 102B. The terminal 103 is crimped to the coating 102A and the wire bundle 102B exposed at the end. The applicator 1 covers the wire bundle 102B exposed from the end of the electric wire 102 with coating material 101, thereby preventing corrosion at the crimped joint between the wire bundle 102B and the terminal 103.

[0015] The coating device 1 includes a conveying unit 2, an electric wire supplying unit 3 for supplying terminal-attached electric wires 10 to the conveying unit 2, an imaging unit 4 for imaging the terminal-attached electric wires 10 conveyed by the conveying unit 2, an application unit 5 for applying coating agent 101 to the ends of the terminal-attached electric wires 10 conveyed by the conveying unit 2, a UV irradiation unit 6 for irradiating the applied coating agent 101 with UV light, a control unit 7 for controlling these units 3 to 6, and a display unit 8.

[0016] The above-mentioned electric wire supply unit 3, imaging unit 4, coating unit 5, and UV irradiation unit 6 are arranged side by side in the left-right direction. From right to left, they are arranged in the order of electric wire supply unit 3, imaging unit 4, coating unit 5, and UV irradiation unit 6.

[0017] First, the configuration of the transfer unit 2 will be described. As shown in Fig. 2 and Fig. 3, the transfer unit 2 of this embodiment has four rear electric wire chucks 21 and four front electric wire chucks 22. The four rear electric wire chucks 21 are arranged side by side at equal intervals in the left-right direction. The four rear electric wire chucks 21 are provided so as to be movable in the left-right direction between a first position and a second position.

[0018] 2 and 3 , at the first position, the four rear electric wire chucks 21 face the electric wire supply unit 3, the imaging unit 4, the coating unit 5, and the UV irradiation unit 6 in the front-rear direction. At the second position, the rightmost rear electric wire chuck 21 faces the imaging unit 4 in the front-rear direction, the second leftmost rear electric wire chuck 21 faces the UV irradiation unit 6 in the front-rear direction, and the leftmost rear electric wire chuck 21 is located to the left of the UV irradiation unit 6.

[0019] 3, the four front electric wire chucks 22 are arranged forward in the front-rear direction (on the side of the electric wire supply unit 3, the imaging unit 4, the coating unit 5, and the UV irradiation unit 6) of the four rear electric wire chucks 21. The four front electric wire chucks 22 are arranged side by side at equal intervals in the left-right direction and face the electric wire supply unit 3, the imaging unit 4, the coating unit 5, and the UV irradiation unit 6 in the front-rear direction. The four front electric wire chucks 22 do not move in the left-right direction.

[0020] Next, the configurations of the rear electric wire chuck 21 and the front electric wire chuck 22 will be described. The four rear electric wire chucks 21 have the same configuration. The rear electric wire chuck 21 has a cubic main body 23 and a pair of chucks 24, 24 that are attached to the main body 23 so as to be able to open and close freely and that clamp and hold the terminal-fitted electric wire 10 from the left and right directions.

[0021] The chuck portion 24 has an arm 24A attached to the main body 23 so that a first end thereof is rotatable about an axis along the front-rear direction, and chuck claws 24B attached to a second end of the arm 24A. When the second ends of the pair of arms 24A are rotated so that they protrude in the left-right direction from the main body 23, the pair of chuck claws 24B open, releasing the hold of the terminal-fitted electric wire 10. When the second ends of the pair of arms 24A are rotated so that they protrude upward from the main body 23, the pair of chuck claws 24B close, allowing the terminal-fitted electric wire 10 to be clamped and held from the left-right direction.

[0022] The front electric wire chuck 22 has the same configuration as the rear electric wire chuck 21, and therefore a detailed description thereof will be omitted here. The main body 23 of the rear electric wire chuck 21 is attached to a cylinder (not shown) that moves in the left-right direction.

[0023] The conveying operation of the conveying unit 2 configured as described above will be described. The electric wire with terminals 10 is held (held in the correct position) by the electric wire supplying unit 3 in the rightmost rear electric wire chuck 21 and front electric wire chuck 22. Next, the front electric wire chuck 22 is opened, and the rear electric wire chuck 21 is moved from the first position to the second position. As a result, the electric wire with terminals 10 is conveyed to the imaging unit 4, and can be held by the front electric wire chuck 22, which is the second from the right and arranged opposite the imaging unit 4. Thereafter, the rear electric wire chuck 21 is opened and returned from the second position to the first position, and the electric wire with terminals 10 can be held by the rear electric wire chuck 21, which is the second from the right. By repeating this process, the electric wire with terminals 10 can be conveyed to the electric wire supplying unit 3, the imaging unit 4, the coating unit 5, and the UV irradiation unit 6 in that order.

[0024] The wire supply unit 3 has a work setting jig (not shown). When an operator inserts an end of the terminal-fitted wire 10 into the work setting jig and the end abuts against a positioning wall inside the work setting jig, the front wire chuck 22 closes. This allows the terminal 103 of the terminal-fitted wire 10 to be positioned in the front-rear direction.

[0025] 4, the imaging unit 4 has a camera 31 and a ring-shaped illumination unit 32 arranged below the camera 31. The camera 31 is attached facing downward. When the electric wire with terminal 10 is transported to the imaging unit 4 and held by the front electric wire chuck 22 facing the imaging unit 4 in the front-rear direction, the terminal 103 comes within the imaging range of the camera 31.

[0026] The applicator 5 has a discharge nozzle (not shown) that discharges the coating material 101 and a UV light source (not shown) that provisionally irradiates UV light. The discharge nozzle is provided so as to be movable in the left-right and front-rear directions by a left-right cylinder and a front-rear cylinder. When the terminal-attached electric wire 10 is transported to the applicator 5 and held by the front electric wire chuck 22 that faces the applicator 5 in the front-rear direction, the terminal 103 enters the discharge range of the discharge nozzle. Furthermore, in the applicator 5, if the terminal-attached electric wire 10 cannot be transported to the UV irradiation unit 6 within a predetermined time after the coating material 101 is discharged onto the terminal-attached electric wire 10, UV light is provisionally irradiated by a UV light source (not shown) to prevent dripping of the coating material 101.

[0027] The UV irradiation unit 6 has a UV light source (not shown) that irradiates UV light. When the electric wire with terminal 10 is transported to the UV irradiation unit 6 and held by the front electric wire chuck 22 facing the UV irradiation unit 6 in the front-rear direction, the terminal 103 comes within the irradiation range of the UV light source.

[0028] The control unit 7, which functions as a coating inspection unit, a first coating control unit, a second coating control unit, a transport control unit, and an imaging control unit, is composed of a microcomputer that operates according to programs stored in a storage unit, and is responsible for overall control of the coating device 1. In the coating mode, the control unit 7 transports the terminal-attached electric wire 10 through the electric wire supply unit 3, the imaging unit 4, the coating unit 5, and the UV irradiation unit 6 in this order, and sequentially supplies the terminal-attached electric wire 10, applies the coating agent 101, and irradiates it with UV light. The control unit 7 also measures the terminal positions from images of the terminals 103 captured by the imaging unit 4, determines the application position of the coating agent 101 based on the measured terminal positions, and controls the movement of the discharge nozzle to apply the coating agent 101 to the determined application position (i.e., the position that covers the exposed wire bundle 102B).

[0029] In the inspection mode, the control unit 7 inspects the application position of the coating agent 101 in the coating unit 5. To inspect the application position, the coating device 1 has a plate 9 and an attachment jig 11 for detachably attaching the plate 9 to the conveying unit 2, as shown in FIG.

[0030] The plate 9 is provided in an elongated shape and is attached to the conveying section 2 so that its longitudinal direction is along the front-rear direction. A reference shape 91 is formed on the upper surface of the front end of the plate 9. The reference shape 91 is formed by providing a groove on the surface of the plate 9. In this embodiment, the reference shape 91 is two perfect circles with different radii. The two perfect circles are formed so that their centers are at the same position.

[0031] As shown in Figures 8 to 10, the control unit 7 controls the coating unit 5 to eject the coating material 101 onto the plate 9 to form coating beads 12A to 12E, controls the imaging unit 4 to capture an image of the plate 9 on which the coating beads 12A to 12E have been formed, and inspects the coating unit 5 based on the captured image of the plate 9.

[0032] Next, a description will be given of the mounting jig 11 that mounts the plate 9 to the transport unit 2. In this embodiment, the mounting jig 11 detachably mounts the plate 9 to the main body 23 of the rear electric wire chuck 21 (the second rear electric wire chuck 21 from the right) that faces the imaging unit 4 in the front-rear direction. As shown in FIGS. 4 to 6, the mounting jig 11 has a first mounting portion 111 fixed to the main body 23, and a second mounting portion 112 that is attached to the first mounting portion 111 and to which the plate 9 is fixed.

[0033] The first mounting portion 111 is generally plate-shaped and is fixed to the rear surface of the main body 23 with a thickness direction facing the front-rear direction by screws. As shown in FIG. 5, the first mounting portion 111 protrudes upward from the main body 23. A pair of positioning pins 111A (first positioning portions) are erected on the upper surface of the first mounting portion 111. The pair of positioning pins 111A are arranged side by side in the left-right direction. A guide block 111B that guides the second mounting portion 112 is attached to the upper surface of the first mounting portion 111. The guide block 111B is elongated in the left-right direction and is located behind the pair of positioning pins 111A.

[0034] The second mounting portion 112 includes a first mounting block 112A, a second mounting block 112B, and a handle portion 112C. As shown in FIG. 6, the first mounting block 112A includes a block main body 112A-1 mounted on the upper surface of the first mounting portion 111 and a protrusion 112A-2 protruding forward from the center of the block main body 112A-1 in the left-right direction. The block main body 112A-1 accommodates a pair of metal bushes 112D aligned in the left-right direction, and the pair of metal bushes 112D, 112D are exposed from the bottom surface. The pair of metal bushes 112D, 112D are each provided with a positioning hole 112E (second positioning portion) that fits into the pair of positioning pins 111A, 111A. The protrusion 112A-2 protrudes forward from the lower end of the block main body 112A-1 and protrudes downward below the block main body 112A.

[0035] The second mounting block 112B is mounted on the upper surface of the protruding portion 112A-2 and screwed to the block main body 112A-1. The plate 9 is arranged with its longitudinal direction facing the front-to-rear direction, and its rear end is mounted on the upper surface of the second mounting block 112B and fixed there with screws. The handle portion 112C is attached so as to protrude from the upper surface of the block main body 112A-1. The worker holds the handle portion 112C and moves the second mounting portion 112, to which the plate 9 is fixed, downward toward the first mounting portion 111. At this time, the rear surface of the block main body 112A-1 slides against the entire surface of the guide block 111B, and the rear surface of the protruding portion 112A-2 slides against the front surface of the first mounting portion 111, thereby guiding the second mounting portion 112 toward the first mounting portion 111.

[0036] Furthermore, the second mounting portion 112 can be attached to the first mounting portion 111 by inserting matching positioning pins 111A protruding from the first mounting portion 111 into a pair of positioning holes 112E provided in the second mounting portion 112.

[0037] Next, the operation of the coating apparatus 1 configured as described above in the inspection mode will be described with reference to the flowchart in Fig. 7. For example, an operator performs a coating inspection when starting up the coating apparatus 1. First, the operator attaches the second mounting portion 112, to which the plate 9 is fixed, to the first mounting portion 111. Then, the operator operates an operation unit (not shown) to set the inspection mode.

[0038] When the inspection mode is set, the control unit 7 controls the transport unit 2 to transport the plate 9 to the coating unit 5 (S1). The control unit 7 controls the coating unit 5 to eject the coating agent 101 onto the plate 9 to form coated beads 12A to 12E (S2). In this embodiment, five coated beads 12A to 12E are formed on the plate 9.

[0039] 8 to 10, coated beads 12A (first coated beads) are ejected at the center of reference shape 91, coated beads 12B (second coated beads) and 12C (third coated beads) are arranged at equal intervals in the left-right direction on either side of coated beads 12A, and coated beads 12D (fourth coated beads) and 12E (fifth coated beads) are arranged at equal intervals in the front-rear direction on either side of coated beads 12A. Then, control unit 7 irradiates coated beads 12A to 12E with UV light from a UV light source for preliminary irradiation provided in coating unit 5 (S3).

[0040] Next, control unit 7 controls transport unit 2 to transport plate 9 to imaging unit 4, which captures an image of plate 9 (S4, S5). Control unit 7 processes the captured image of plate 9 to determine the center position of reference shape 91 and the center positions of five coated beads 12A-12E (S6, S7). Control unit 7 then determines whether the shapes of five coated beads 12A-12E are perfect circles (S8). As shown in FIG. 9, if any of five coated beads 12A-12E is not perfect circle, the coated bead shape is determined to be abnormal (Y in S8), and control unit 7 displays the defective coated shape on display unit 8 (S9) and terminates the process.

[0041] 8, if all five coated beads 12A-12E are perfectly round and the coated beads are not abnormal (N in S8), control unit 7 determines the amount of deviation between the center position of reference shape 91 and the center positions of the five coated beads 12A-12E (S10). If the amount of deviation is within the tolerance for all of coated beads 12A-12E, control unit 7 determines that no positional deviation has occurred (N in S11), displays "good coating" on display unit 8 (S12), and ends the process. Note that a tolerance is set for each of the five coated beads 12A-12E.

[0042] On the other hand, if any one of the application beads 12A-12E has a deviation amount outside the allowable range, it is determined that a positional deviation has occurred (Y in S11), and the control unit 7 displays the application position defect on the display unit 8 (S13) and terminates the process. In S13, the control unit 7 also displays the deviation amount calculated in S10.

[0043] Poor coating shape can be caused by problems such as air bubbles in the nozzle, foreign matter in the nozzle, abnormalities in the coating material discharge pressure, abnormalities in the coating material temperature, etc. By displaying a defective coating shape, workers can correct the problem that is causing the poor coating shape.

[0044] By displaying the coating position error and the amount of deviation, the operator can adjust the control amount of the left and right cylinders and the front and rear cylinders to adjust the position of the coating nozzle and eliminate the coating position error.

[0045] Plate 9 on which coated beads 12A to 12E are formed can be used again to inspect the coated positions by removing coated beads 12A to 12E. Plate 9 may be coated with a coating that makes it easier to remove coated beads 12A to 12E.

[0046] According to the above-described embodiment, the control unit 7 determines whether the coating position is defective based on a comparison between the center position of the reference shape 91 on the plate 9 and the center positions of the coating beads 12A to 12E. This makes it possible to quantitatively determine whether the coating position is defective without wasting the terminal-attached electric wire 10 (workpiece).

[0047] According to the above-described embodiment, the control unit 7 determines whether the coating shape is defective based on the shapes of the coating beads 12A to 12E captured in the image of the plate 9. This makes it possible to determine whether the coating shape is defective without wasting the terminal-fitted electric wire 10.

[0048] According to the embodiment described above, reference shape 91 is circular. This makes it easy to determine the center position of reference shape 91. Furthermore, by forming coated beads 12A to 12E within a circular shape, if the plate is positioned so that reference shape 91 falls within the imaging range of imaging unit 4, coated beads 12A to 12E will also fall within the imaging range.

[0049] According to the above-described embodiment, the application beads 12A to 12E are arranged in the movement directions (left-right and front-back directions) of the discharge nozzle, so that the discharge positions of the discharge nozzles can be easily corrected from the positions of the application beads 12A to 12E.

[0050] According to the above-described embodiment, the coating position is inspected using the imaging unit 4 for inspecting the terminal position. As a result, defects in the coating position can be easily and inexpensively inspected by simply attaching the plate 9 to the conveying unit 2 of the existing coating device 1.

[0051] According to the embodiment described above, the plate 9 is attached to the main body 23 so as to be disposed between the pair of open chucks 24, 24. This allows the plate 9 to be attached to the main body 23 without interfering with the pair of chucks 24, 24 of the transfer unit 2.

[0052] According to the embodiment described above, the first mounting portion 111 provided with a pair of positioning pins 111A, 111A is mounted to the main body portion 23, and the plate 9 is mounted to the second mounting portion 112 provided with a pair of positioning holes 111E, 111E. As a result, by fitting the positioning pin 111A of the first mounting portion 111 into the positioning hole 111E of the second mounting portion 112, the plate 9 can be mounted to the main body portion 23 easily and accurately in a position.

[0053] (Second embodiment) Next, a second embodiment will be described. According to the first embodiment described above, the amount of deviation between the center position of the reference shape 91 and the center position of the coated balls 12A to 12E is calculated, and a defective coating position is determined based on each of the calculated amounts of deviation. In the second embodiment, the average of the center positions of the coated balls 12A to 12E is calculated, and a defective coating position is determined based on the amount of deviation between the center position of the reference shape 91 and the average of the center positions of the coated balls 12A to 12E.

[0054] The configuration of the coating apparatus 1 of the second embodiment is the same as that of the first embodiment, and therefore a detailed description thereof will be omitted here. Next, the operation of the coating apparatus 1 of the second embodiment in the inspection mode will be described with reference to the flowchart of Fig. 11. In Fig. 11, parts that perform the same operations as those of the coating apparatus 1 shown in Fig. 7 already described in the first embodiment are assigned the same reference numerals, and detailed description thereof will be omitted.

[0055] The control unit 7 performs the same operations as in the first embodiment from S1 to S8. When the control unit 7 determines that there is no abnormality in the application shape (N in S8), it calculates the average of the center positions of the application beads 12A to 12E (S14).

[0056] 12, control unit 7 determines center position P1 between coated ball 12A and coated ball 12B, center position P2 between coated ball 12A and coated ball 12C, center position P3 between coated ball 12A and coated ball 12D, and center position P4 between coated ball 12A and coated ball 12E. Next, control unit 7 determines line L1 connecting center positions P1 and P2, and line L2 connecting center positions P3 and P4. Control unit 7 determines position Pa where line L1 and L2 intersect as the average of the center positions of coated balls 12A to 12E.

[0057] The present invention is not limited to the above-described embodiments, and can be appropriately modified, improved, etc. Furthermore, the material, shape, size, number, location, etc. of each component in the above-described embodiments are arbitrary and not limited as long as they can achieve the present invention.

[0058] According to the above-described embodiment, the electric wire with terminal 10 is used as the workpiece, but the present invention is not limited to this. The workpiece does not have to be the electric wire with terminal 10 as long as it is coated with the coating material 101.

[0059] According to the above-described embodiment, the application position of the coating material 101 is inspected using the imaging unit 4 for inspecting the terminal position, but this is not limited to this. If the coating device 1 does not have the imaging unit 4, the application position may be inspected by photographing the plate using an imaging unit separate from the coating device 1.

[0060] According to the embodiment described above, a plurality of coated beads 12A to 12E are formed on the plate 9, but the present invention is not limited to this. Only one coated bead may be formed on the plate 9.

[0061] According to the embodiment described above, the transfer unit 2 has four rear wire chucks 21, but the number of rear wire chucks 21 is not limited to four.

[0062] Furthermore, after being irradiated by the UV light source for preliminary irradiation that coating unit 5 has, plate 9 is transported to imaging unit 4, but this is not limited to this. After coating beads 12A to 12E are formed on plate 9 in coating unit 5, plate 9 may be transported to UV irradiation unit 6, where UV light may be irradiated, and plate 9 may then be transported to imaging unit 4.

[0063] Here, the features of the embodiments of the coating inspection device, coating device, and coating inspection method according to the present invention described above will be briefly summarized and listed below in [1] to [9].

[0064] [1] An application inspection device (1) for inspecting an application unit (5) that applies an application agent (101), an imaging unit (4) for imaging a plate (9) on which the coating agent (101) is discharged by the coating unit (5) and coating beads (12A to 12E) are formed; an application inspection unit (7) that inspects the application unit (5) based on an image of the plate (9) captured by the imaging unit (4); The plate (9) has a reference shape (91) formed on its surface, The application inspection unit (7) determines whether the application position is defective based on a comparison between the center position of the reference shape (91) and the center position of the application ball (12A to 12E). Coating inspection device (1).

[0065] According to the coating inspection device (1) having the configuration [1] above, the coating inspection unit (7) determines whether the coating position is defective based on a comparison between the center position of the reference shape (91) on the plate (9) and the center position of the coating balls (12A to 12E). This makes it possible to quantitatively determine whether the coating position is defective without wasting the workpiece.

[0066] [2] In the coating inspection device (1) described in [1], The application inspection unit (7) determines whether the application shape is defective based on the shape of the application balls (12A to 12E). Coating inspection device (1).

[0067] According to the coating inspection device (1) configured as described above in [2], defects in the coating shape can be determined without wasting the workpiece.

[0068] [3] In the coating inspection device (1) described in [1], The reference shape (91) formed on the plate (9) is a circular shape, The application beads (12A to 12E) are formed within the circular shape. Coating inspection device (1).

[0069] According to the coating inspection device (1) having the configuration [3] above, by forming the reference shape (91) in a circular shape, it is easy to determine the center position of the reference shape (91). Furthermore, by forming the coated beads (12A to 12E) within the circular shape, if the plate is positioned so that the reference shape (91) falls within the imaging range of the imaging unit (4), the coated beads (12A to 12E) also fall within the imaging range.

[0070] [4] In the coating inspection device (1) described in [1], the applicator (5) is provided so as to be movable in a first direction (left-right direction) and a second direction (front-rear direction) intersecting the first direction, and has a discharge nozzle that discharges the applicator (101); The plate (9) is formed with a first applicator ball (12A), a second applicator ball (12B) and a third applicator ball (12C) arranged in a first direction with the first applicator ball (12A) sandwiched between them, and a fourth applicator ball (12D) and a fifth applicator ball (12E) arranged in the second direction with the first applicator ball (12A) sandwiched between them, The application inspection unit (7) determines whether the application positions are defective based on a comparison between the center positions of the first to fifth application balls (12A to 12E) and the center position of the reference shape (91). Coating inspection device (1).

[0071] According to the coating inspection device (1) configured as [4] above, the first to fifth coating balls (12A to 12E) are arranged in the direction of movement of the discharge nozzle, making it easier to correct the discharge position of the discharge nozzle from the positions of the first to fifth coating balls (12A to 12E).

[0072] [5] a conveying section (2) for conveying the workpiece (10); an imaging unit (4) that images the work (10) transported by the transport unit (2); an application unit (5) that applies a coating agent (101) to the work (10) transported by the transport unit (2); and a first application control unit (7) that determines an application position of the coating agent (101) based on a captured image of the workpiece (10) and controls the application unit (5) to apply the coating agent (101) to the determined application position. An application device (1), a plate (9) detachably attached to the conveying unit (2) and conveyed by the conveying unit (2); a second application control unit (7) that, when set to an inspection mode, controls the application unit (5) to discharge the application agent (101) and form application beads (12A to 12E) on the plate (9); a transport control unit (7) that controls the transport unit (2) to transport the plate (9) on which the coating beads (12A to 12E) are formed to the imaging unit (4); and an application inspection unit (7) that inspects the application unit (5) based on an image of the plate (9) captured by the imaging unit (4), The plate (9) has a reference shape (91) formed on its surface, The application inspection unit (7) determines whether the application position is defective based on a comparison between the center position (91) of the reference shape and the center position of the application ball (12A to 12E). Application device (1).

[0073] According to the coating device (1) having the configuration [5] above, defects in the coating position can be checked easily and inexpensively using an existing coating device (1).

[0074] [6] In the coating device (1) according to [5], The transport unit (2) includes a main body (23) that is provided so as to be movable in the arrangement direction of the imaging unit (4) and the application unit (5), and a pair of chuck units (24) that are attached to the main body (23) so as to be openable and closable and that sandwich and hold the work (10) from the arrangement direction, The plate (9) is attached to the body portion (23) so as to be disposed between the pair of open chuck portions (24, 24). Application device (1).

[0075] According to the coating device (1) having the configuration [6] above, the plate (9) can be attached to the main body (23) without interfering with the pair of chucks (24, 24) of the conveying section (2).

[0076] [7] In the coating device (1) according to [6], The plate (9) is further provided with a mounting jig (11) for mounting the plate (9) to the main body portion (23), The mounting jig (11) is a first mounting portion (111) attached to the main body portion (23) and provided with a pair of first positioning portions (111A, 111A) aligned in the alignment direction; a pair of second positioning portions (112E, 112E) fitted to the pair of first positioning portions (111A, 111A), and a second mounting portion (112) to which the plate (9) is attached; Application device (1).

[0077] According to the application device (1) having the configuration [7] above, the plate (9) can be easily and accurately attached to the main body (23) by fitting the second positioning portion (112E) of the second attachment portion (112) to which the plate (9) is attached into the first positioning portion (111A) provided on the first attachment portion (111) attached to the main body (23).

[0078] [8] In the coating device (1) according to [5], The work (10) is an electric wire (102) having a terminal (103) attached to its end, The applicator (5) applies the coating material (101) to the end of the electric wire (102). Application device (1).

[0079] According to the coating device (1) having the configuration [8] above, the electric wire (102) is not wasted.

[0080] [9] A coating inspection method for inspecting an application unit (5) that applies a coating agent (101), comprising: an imaging step of imaging a plate (9) on which coated beads (12A to 12E) are formed by discharging the coating agent (101) from the coating unit (5); an inspection step of inspecting the application unit (5) based on the captured image of the plate (9), The plate (9) has a reference shape (91) formed on its surface, In the inspection step, a defect in the application position is determined based on a comparison between the center position of the reference shape (91) and the center position of the application ball (12A to 12E). Coating inspection method.

[0081] According to the configuration [9] above, the coating inspection unit (7) determines whether the coating position is defective based on a comparison between the center position of the reference shape (91) on the plate (9) and the center position of the coating balls (12A to 12E). This makes it possible to quantitatively determine whether the coating position is defective without wasting the workpiece. [Explanation of symbols]

[0082] 1 Coating equipment (coating inspection equipment) 2. Conveyor section 4. Imaging unit 5. Application section 7 control unit (coating inspection unit, first coating control unit, second coating control unit, transport control unit, imaging control unit) 9 Plates 10. Wire with terminal (work) 102 Electric wire 103 terminal 11 Mounting jig 12A~12E Coating balls (1st coating ball to 5th coating ball) 23 Main body 24 Chuck part 91 Standard shape 101 liniment 102 Electric wire 103 terminal 111 First mounting part 112 Second mounting part 111A Locating pin (first positioning part) 112E Positioning hole (second positioning part)

Claims

1. An application inspection device that inspects an application unit that applies an application agent, an imaging unit that images a plate on which the coating agent is discharged by the coating unit and a coating droplet is formed; a coating inspection unit that inspects the coating unit based on an image of the plate captured by the imaging unit, The plate has a reference shape formed on its surface, the application inspection unit determines whether the application position is defective based on a comparison between the center position of the reference shape and the center position of the application ball. Coating inspection device.

2. The coating and inspection device according to claim 1, The coating inspection unit determines whether the coating shape is defective based on the shape of the coating ball. Coating inspection device.

3. The coating and inspection device according to claim 1, the reference shape formed on the plate is a circle, The coating ball is formed within the circular shape. Coating inspection device.

4. The coating and inspection device according to claim 1, the applicator is provided to be movable in a first direction and a second direction intersecting the first direction, and has a discharge nozzle that discharges the application agent; The plate is formed with a first coating ball, second and third coating balls arranged in a first direction with the first coating ball sandwiched between them, and fourth and fifth coating balls arranged in the second direction with the first coating ball sandwiched between them, the coating inspection unit determines whether the coating positions are defective based on a comparison of the center positions of the first to fifth coating balls with the center position of the reference shape. Coating inspection device.

5. a transport unit that transports the workpiece; an imaging unit that images the workpiece transported by the transport unit; an application unit that applies a coating agent to the workpiece transported by the transport unit; A first application control unit that determines an application position of the coating agent based on the captured image of the workpiece and controls the application unit to apply the coating agent to the determined application position. A coating device comprising: a plate detachably attached to the transport unit and transported by the transport unit; a second coating control unit that, when set to an inspection mode, controls the coating unit to discharge the coating agent and form a coating droplet on the plate; a transport control unit that controls the transport unit to transport the plate on which the coating beads are formed to the imaging unit; a coating inspection unit that inspects the coating unit based on an image of the plate captured by the imaging unit, The plate has a reference shape formed on its surface, the application inspection unit determines whether the application position is defective based on a comparison between the center position of the reference shape and the center position of the application ball. Coating equipment.

6. The coating device according to claim 5, the conveying unit includes a main body portion provided so as to be freely movable in an arrangement direction of the imaging unit and the application unit, and a pair of chuck portions attached so as to be freely opened and closed relative to the main body portion and configured to sandwich and hold the workpiece from the arrangement direction, The plate is attached to the body portion so as to be disposed between the pair of open chuck portions. Coating equipment.

7. The coating device according to claim 6, a mounting jig for mounting the plate to the main body portion; The mounting jig is a first mounting portion attached to the main body portion and provided with a pair of first positioning portions aligned in the alignment direction; a second mounting portion to which the plate is attached, the second mounting portion being provided with a pair of second positioning portions that are fitted into the pair of first positioning portions, Coating equipment.

8. The coating device according to claim 5, The work is an electric wire having a terminal attached to its end, The applicator applies the coating agent to the end of the electric wire. Coating equipment.

9. A coating inspection method for inspecting an application unit that applies a coating agent, comprising: an imaging step of imaging a plate on which a coating droplet is formed by discharging the coating agent from the coating unit; an inspection step of inspecting the application unit based on the captured image of the plate, The plate has a reference shape formed on its surface, In the inspection step, a defect in the coating position is determined based on a comparison between the center position of the reference shape and the center position of the coating ball. Coating inspection method.

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