JP2012078197A - Painted surface inspection device of painted object and painted surface inspection method of painted object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a painted surface inspection device of a painted object which prevents burning of the painted surface using illumination means consisting of an LED, eliminates inspection unevenness by difference in colors of the painted surface of a vehicle to raise inspection ratio, and raises radiation performance of a light source of the inspection device to prevent a failure and shorter life resulting from thermal runaway, etc., and a painted surface inspection method of the painted object using the device.SOLUTION: An inspection device of a painted surface includes an LED holding device with an LED as a light source capable of irradiating a light emission color according to hue of the painted surface on the painted surface of the painted object, inspects the painted surface of the painted object based on reflected light of light irradiated by the LED from the painted surface, in which the LED holding device is equipped with: a holding base for annularly arranging a plurality of types of LEDs with different color development by every plurality of pieces; a plurality of heat sinks arranged at predetermined intervals behind the holding base; and a vertical lever for inserting the holding base and the heat sinks to be connected and fixed.

Description

  The present invention relates to a coating surface inspection apparatus for a coating object and a coating surface inspection method for a coating object using the apparatus.

  Conventionally, a vehicle is manufactured through various processes, and one of the processes includes a process of coating an object to be coated such as a body of the vehicle. Vehicles that have been painted are inspected for appearance, and in this appearance inspection, the presence or absence of coating defects such as contamination of the paint film is inspected. In the appearance inspection, the coating state of the object to be coated is inspected based on the reflected light from the coating film of the light irradiated from the light source (see, for example, Patent Document 1).

  In addition, when visually inspecting the painted surface of a vehicle of multiple colors, if the light source is a single color, color unevenness, wrinkles, etc. may not be found depending on the paint color on the vehicle. For example, even if color unevenness, wrinkles, etc. in a dark-colored vehicle can be found, it is difficult to find color unevenness, wrinkles, etc. in a light-colored vehicle. As a result, there is a problem that the inspection rate of a specific color is lowered. Alternatively, there is a problem in that the inspection time becomes longer for a specific color and hinders the subsequent manufacturing process.

  Thus, it has been proposed to make it easier to find color unevenness and wrinkles by changing the illumination color of light emitted from the light source depending on the paint color (see, for example, Patent Document 2).

  By the way, in the appearance inspection, in order to improve the identification accuracy, it is necessary to illuminate the entire painted surface to be inspected brightly and uniformly, and for that purpose, a large illumination means is required. As such illumination means, a halogen lamp is usually used. However, while sufficient illuminance can be ensured, there is a problem that the painted surface is burned.

  In recent years, therefore, it has been proposed to use an LED as a light source including Patent Document 1 (see, for example, Patent Document 3). As a result, the light source can be miniaturized and can be used while being carried by an operator.

JP 2007-14855 A JP 2009-174931 A JP 2005-291842 A

  However, when using an LED as a light source, heat countermeasures are important, but no consideration has been given to heat countermeasures when using LEDs as a light source in conventional coating surface inspection apparatuses for coated objects. Currently.

  That is, the LED is changed into heat except for energy consumed by visible light, and the LED has a small package surface area and small heat dissipation due to radiation, so how to efficiently dissipate heat is a serious issue. .

  Therefore, in the present invention, the lighting means composed of LEDs is used to prevent burn-in of the painted surface, to eliminate the inspection unevenness due to the difference in the color of the painted surface of the vehicle, and to improve the inspection rate. It is an object of the present invention to provide a coated surface inspection apparatus for a coated object that improves performance and prevents a failure due to thermal runaway or the like, and a method for inspecting a painted surface of the coated object using the apparatus.

  In order to achieve the above object, an inspection apparatus for a coated surface of a coated object according to claim 1 is an LED as a light source capable of irradiating the coated surface of the coated object with a luminescent color corresponding to the color of the coated surface. A coating surface inspection device for an object to be inspected based on reflected light from the coating surface of the light irradiated by the LED, and The LED holding device includes a holding base for annularly arranging a plurality of types of LEDs having different colors, a plurality of heat dissipating plates disposed at predetermined intervals behind the holding base, the holding base, A vertical gutter for inserting and fixing the heat radiating plate is provided.

  According to a second aspect of the present invention, in the painted surface inspection apparatus for a coated object according to the first aspect, the light emission is performed among the plurality of types of LEDs having different colors depending on the color of the painted surface of the coated object. It is characterized by comprising a switching unit that can selectively switch the LED to be switched.

  The invention described in claim 3 is characterized in that, in the coating surface inspection apparatus for an object to be coated according to claim 1 or 2, a dimming circuit for dimming light emitted from the LED is provided. To do.

  According to a fourth aspect of the present invention, in the inspection device for a coated surface of an object to be coated according to any one of the first to third aspects, the LED holding device is slidably accommodated along the longitudinal direction. An irradiation case, a handle projecting obliquely on the outer periphery of the irradiation case, and storing a battery as a power source of the LED, an optical axis provided at the opening of the irradiation case and irradiated from the LED And an optical lens mechanism for changing the path of a light beam parallel to the light beam.

  According to a fifth aspect of the present invention, in the apparatus for inspecting a coating surface of an object to be coated according to the fourth aspect, an operation portion for sliding the LED holding device back and forth is provided in the irradiation case.

  The method for inspecting a painted surface of an object to be coated according to claim 6 is an inspection according to any one of claims 1 to 5, wherein the luminescent color corresponding to the color of the painted surface is applied to the painted surface of the object to be coated. It has the process of irradiating from the light source in an apparatus, and having visually discriminating the presence or absence of the coating defect of the coating surface of a to-be-coated object based on the reflected light from the said coating surface.

  According to the vehicle appearance inspection apparatus of the first aspect of the present invention, since the light source is an LED, a sufficient inspection time is ensured without worrying about the painted surface of the vehicle being burned in during the inspection. Can do. In addition, during inspection, the color of the light source to be irradiated can be changed for each color of the painted surface, making it easier to find defects such as color irregularities and wrinkles that differ in appearance for each painted color and improving the detection rate. There is an effect that can. In addition, since a plurality of heat radiating plates disposed at a predetermined interval behind the holding base and a vertical rod for inserting and fixing the holding base and the heat radiating plate are provided, the light source is long. Even if it is continuously lit for a long time, it has the effect of improving the heat dissipation performance of the light source of the inspection device and preventing failure and shortening of the service life due to thermal runaway.

  According to the coating surface inspection apparatus for an object to be coated according to claim 2 of the present invention, an LED that emits light is selected from the plurality of types of LEDs having different colors depending on the color of the surface to be coated. Since it is possible to irradiate light according to a specific paint color by operating the switch unit, defects such as color unevenness and wrinkles that are difficult to find depending on the specific paint color are provided. There is an effect that can be easily found.

  According to the coating surface inspection apparatus of the object to be coated according to claim 3 of the present invention, since the light control circuit for adjusting the light emitted from the LED as the light source is provided, By varying the amount of current supplied to the LED while performing frequency modulation, the LED can be dimmed to change the brightness. By irradiating the painted surface with the light thus adjusted, it is possible to change the degree of shading on the painted surface and make it easier to visually recognize color unevenness and wrinkles.

  According to the coating surface inspection apparatus for an object to be coated according to claim 4 of the present invention, the LED holding device is slidably housed along the longitudinal direction, and the outer periphery of the irradiation case is inclined. A handle for housing a battery as a power source of the LED, and an optical device for changing the course of a light beam parallel to the optical axis irradiated from the LED, provided in the opening of the irradiation case. A lens mechanism. By configuring in this way, the heat generated by the lighting of the LED can be transmitted to a plurality of heat sinks through the vertical fin, and can be cooled to an appropriate temperature with these heat sinks, An operator can always use it safely without increasing the temperature of the outside of the irradiation case, and there is an effect that a lightweight and compact configuration can be obtained.

  According to the coating surface inspection apparatus for an object to be coated according to claim 5 of the present invention, since the operation portion for sliding the LED holding device back and forth is provided in the irradiation case, the operator can operate the operation portion of the irradiation case. Thus, there is an effect that the focus of light can be adjusted by sliding the LED holding device back and forth.

  According to the method for inspecting a coated surface of an object to be coated according to claim 6 of the present invention, the luminescent color corresponding to the color of the painted surface is applied to the painted surface of the object to be coated. Since it has the process of irradiating from the light source in the inspection apparatus of claim | item, and visually determining the presence or absence of the coating defect of the coating surface of a to-be-coated object based on the reflected light from the said coating surface, from a light source being LED Sufficient inspection time can be ensured without worrying about the painted surface of the vehicle being burned in during inspection. In addition, during inspection, the color of the light source to be irradiated can be changed for each color of the painted surface, making it easier to find defects such as color irregularities and wrinkles that differ in appearance for each painted color and improving the detection rate. There is an effect that can. In addition, the heat radiation performance of the light source of the inspection apparatus is improved, and there is an effect of preventing a failure due to thermal runaway or shortening of the service life.

It is the schematic which shows the inspection line of the automobile production factory of embodiment which concerns on this invention. It is a perspective view which shows the inspection apparatus of the coating surface of embodiment which concerns on this invention. It is a side view which shows the inspection apparatus of the coating surface of embodiment which concerns on this invention. It is sectional drawing which shows the inspection apparatus of the coating surface of embodiment which concerns on this invention. It is a front view which shows the LED holding device of embodiment which concerns on this invention. It is sectional drawing which shows the LED holding device of embodiment which concerns on this invention.

  In automobile production plants, various paint colors are obtained through multiple processes, such as the assembly process for assembling the engine to the body, the painting process for painting the surface of the body, and the painting surface inspection process for the painted surface. Is producing vehicles.

  The method for inspecting the painted surface of an object to be coated according to the present embodiment is a method for inspecting the painted surface of a vehicle that has been painted, and inspects it using an inspection device that will be described in detail below. That is, in the process of inspecting the painted surface of the object to be coated, vehicles of each color that have finished the previous painting process flow in sequence on the line, and light from the inspection device as inspection illumination is applied to these differently colored vehicles. Irradiation is performed, and the worker visually inspects the presence or absence of color unevenness or wrinkles on the painted surface. In such visual inspections by workers, the use of multiple types of LEDs with different colors that can irradiate different colors for each vehicle color in the light source installed in the inspection device reduces the possibility of overlooking color irregularities, wrinkles, etc. Is something that can be done. In this embodiment, the method of inspecting the painted surface using a plurality of types of LEDs with different colors is described as a visual method. For example, the painted surface is similarly irradiated with a plurality of types of LEDs with different colors. In addition, it is also conceivable to photograph the painted surface with an imaging device such as a CCD camera and inspect the properties of the painted surface based on the image data.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a coating surface inspection apparatus and an inspection method using the same according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a part of a process in an automobile assembly factory. The two vehicles on the left side in the drawing are waiting for a coating inspection after the painting process, and the vehicle V on the right side is a vehicle V on the inspection line C. The coating surface S is inspected. As shown in the figure, the coating surface inspection apparatus 1 according to the present embodiment is arranged with a certain distance from the body surface of the vehicle V, which is the coating surface S.

  As shown in FIGS. 2 to 3, the configuration of the inspection apparatus 1 includes an irradiation case 2 for housing an LED holding device 4 provided with a plurality of types of LEDs 20 with different colors, and a battery (battery) as a power source for the LEDs 20. LED holding device 4 having a multi-color LED 20 (see, for example, FIG. 4), a handle 3 for housing 26, an optical lens mechanism for changing the path of a light beam L parallel to the optical axis irradiated from the LED 20 ) Etc.

  The irradiation case 2 is formed in a hollow box shape as shown in FIGS. 2 to 3, and a long hole 21b for sliding a sliding operation lever 23 described later is formed on one side surface thereof. Yes. In the internal space of the irradiation case 2, an LED holding device 4 to be described later is housed slidably along the longitudinal direction of the case (see, for example, FIG. 4).

  As shown in FIG. 4, a hollow handle 3 protrudes obliquely on the outer periphery of the irradiation case 2, and a battery (battery) 26 as a power source of the LED 20 is accommodated in the center of the handle 3. is doing. A lid 7 is provided at the bottom of the handle 3 so that the storage space for storing the battery 26 can be opened and closed. A switching lever 30 and a dimming dial 31 as a switching unit, which will be described later, are rotatably provided on the side of the handle 3.

  Furthermore, a dimming substrate 28 having a dimming circuit for dimming the light of the LED 20 is provided in the handle 3. By rotating the dimming dial 31, the dimming circuit of the dimming board 28 changes the brightness by dimming the LEDs 20 by changing the amount of current supplied to each LED 20 while performing frequency modulation. Can be made. In addition, the light control substrate 28 includes a switch circuit as a switching unit for selectively switching the LED to emit light among a plurality of types of LEDs having different colors depending on the color of the painted surface of the object to be coated. Thus, by operating the switching lever 30, each switch of the switch circuit can be turned on and off, and the LED of a desired light emission color can be turned on or off.

  A light beam convex lens 24 as an optical lens mechanism is provided in the light irradiation side opening of the LED 20 of the irradiation case 2, and the irradiation light from the LED 20 is converged and irradiated onto the surface of the object to be converged as light. It is configured as follows.

  Therefore, the irradiation light from the many LEDs 20 arranged in an annular shape is collected at the focal point of the convex lens 24. That is, the light beam L as irradiation light parallel to the optical axis is collected at the focal point F of the convex lens 24. Although the optical lens mechanism is composed of one convex lens, it may be configured such that two convex lenses are arranged in parallel so that light parallel to the optical axis can be irradiated.

  As shown in FIGS. 4 and 6, the LED holding device 4 includes a disk-shaped holding base 11 having a constant thickness for arranging a plurality of types of LEDs 20 having different colors in a ring shape, and a structure of the holding base 11. Three large disk-shaped heat sinks 13, 14, and 15 disposed at a predetermined interval behind, and a vertical for inserting and holding the holding base 11 and the heat sinks 13, 14, and 15 It is composed of a ridge 12.

  As many holding holes 11b as the number of LEDs 20 are formed in the peripheral edge 11a of the holding base 11, and a terminal pin mounted on the base of the LED 20 is inserted into each holding hole 11b. A warm white LED 20w, a natural white LED 20n, and a green LED 20g are sequentially arranged in an annular shape on the peripheral edge 11a of the holding base 11 in this example (see, for example, FIG. 5).

  As shown in FIG. 6, a vertical rod 12 is inserted downward in the center of the holding base 11. This vertical gutter 12 is fixed with three large disk-shaped heat sinks 13, 14, 15 while maintaining a constant interval. For example, the downpipe 12 and the heat sinks 13, 14, and 15 are made of aluminum that is lightweight and has good thermal conductivity, but may be copper or other metals as long as the metal has good thermal conductivity.

  The diameter R2 of the disk-shaped heatsinks 13, 14, 15 is approximately twice the diameter R1 of the holding base 11, and has an effect of efficiently dissipating heat from the LEDs 20 arranged in a ring and cooling it. (For example, see FIG. 5). Although the shape of the heat sink is a disc shape, it may be a square shape according to the shape of the irradiation case 2.

  The upper and lower intervals of the disk-like upper, middle, and lower radiator plates 13, 14, and 15 are substantially the same interval. Furthermore, the thickness of the heat sinks 13, 14, 15 is about 1/3 times the thickness of the holding base 11, so that the heat radiation from the holding base 11 can be transmitted more efficiently. Specifically, the conduction heat from the LED 20 to the holding base 11 is conducted to the upper disk-shaped heat radiation plate 13, and is then transmitted as radiant heat to the middle heat radiation plate 14 and the lower heat radiation plate 15, and has a large area disk shape. The heat radiating plates 13, 14, 15 are configured to radiate heat from the upper and lower surfaces. Each of the heat sinks 13, 14, and 15 is provided with insertion holes 13 a, 14 a, and 15 a for inserting a wiring W that connects the LED and a dimming substrate 28 described later. With such a configuration, the heat at the time of LED lighting can be cooled to an appropriate temperature with three heat radiating plates, the irradiation case 2 can be prevented from becoming high temperature, and the operator can inspect safely. Can do. Furthermore, there is an effect that the heat dissipating portion can be made light and compact.

  Further, as shown in FIG. 4, the outer peripheral edge portions of the three disk-shaped heat radiation plates 13, 14, 15 of the LED holding device 4 are slidable on the inner peripheral surface of the irradiation case 2, and the irradiation case 2 The LED holding device 4 is slidably guided inside.

  In FIG. 6, reference numeral 16 denotes a nut screwed into the vertical rod 12, which is in contact with the upper and lower surfaces of the center portions of the disk-shaped heat radiation plates 13, 14, 15 via spring washers and is caulked vertically. Disc-shaped heat sinks 13, 14 and 15 are fixed to the flange 12. Reference numeral 17 denotes an upper end nut, which is in contact with the upper surface of the holding base 11 and between the nut 16 that is in contact with the lower surface of the upper disk-shaped heat dissipation plate 13 and the upper stage that is in contact with the lower surface of the holding base 11. The disc-shaped heat radiation plate 13 is integrally fixed to the vertical rod 12.

  In addition, a decorative plate 18 having a small diameter is arranged at the upper end of the vertical rod 12 by an annular arrangement of LEDs 20 arranged on the peripheral edge 11a of the disc-shaped holding base 11.

  The vertical rod 12 extends the other end and functions as a slide rod. The slide rod is slidably inserted into a guide cylinder 22 projecting from the center of the seated portion 21a of the irradiation case 2, and the LED holding device 4 is slid in the irradiation case 2 by a sliding operation of the slide rod. can do.

[Vehicle Painted Surface Inspection Device and Vehicle Painted Surface Inspection Method Using the Device]
A painted surface inspection apparatus for a vehicle and a method for inspecting a painted surface of a vehicle using the apparatus will be described.

  As shown in FIG. 1, the vehicles V of the respective colors that have finished the previous painting process sequentially flow to an inspection line C that inspects the painted surface S of the vehicle V. In this inspection line C, an inspection process for the painted surface S of the vehicle V is performed. The dark colors are black, dark blue, light blue, and the like, and the light colors are white, silver, gray, beige, red, and the like.

  When the dark vehicle V is inspected, the light emission color switching lever 30 provided on the handle 3 is operated to switch the light emission color of the LED 20 shown in FIG. 5 to, for example, a warm white color LED 20w to emit light.

  As shown in FIG. 4, when the emitted light flux L of the warm white LED 20w travels parallel to the optical axis and enters the convex lens 24, it is emitted from the exit surface of the convex lens 24, and the focal point F of the convex lens 24 is obtained. To be collected.

  Thus, the light flux L collected at the focal point F of the convex lens 24 is applied to the painted surface S of the vehicle V.

  The worker inspects the presence or absence of color unevenness or wrinkles on the painted surface S from the degree of reflected light reflected on the painted surface S of the vehicle V by visual inspection. For example, when color unevenness or wrinkles as a coating defect on the painted surface S occurs, the worker can visually recognize that portion as a shadow.

  Further, since the LED 20 is used as the light source, the calorific value is less than that of a halogen lamp as a conventional light source, and the worker can use it safely. Conventionally, when a halogen lamp is used as the light source, the painted surface of the vehicle may be burned out. However, by using the LED 20 as the light source, the painted surface will not be burned out, and inspection is performed while ensuring a sufficient inspection time. There is an effect that can.

  Further, the heat generated by the lighting of the LED 20 is transmitted from the holding base 11 to the three disk-shaped heat sinks 13, 14, 15 via the vertical rod 12, and these heat sinks 13, 14, 15 are Even if it is continuously lit for a long time, the heat generated from each LED 20 is efficiently radiated and cooled. Therefore, there is an effect that heat is not transmitted to the exterior surface of the irradiation case 2 and there is no possibility that the operator may be burned. Moreover, the heat dissipation performance of the heat from the LED can be improved, and each heat dissipation plate can prevent a failure or a shortened life due to a thermal runaway or the like.

  Furthermore, when adjusting the focal position of the light beam L applied to the painted surface S of the vehicle V, if the sliding operation lever 23 of the inspection device for the painted surface S is operated in the front-rear direction, the base end of the lever 23 is The connected LED holding device 4 is slid within the irradiation case 2, and the distance between the convex lens 24 and the holding base 11 can be varied to adjust the focal position.

  Further, when dimming the LED 20 to change the brightness, the amount of current supplied to the LED 20 can be varied while performing frequency modulation by a dimming circuit that adjusts the current flowing through the LED 20. By irradiating the painted surface with the light thus adjusted, it is possible to change the degree of shading on the painted surface and make it easier to visually recognize color unevenness and wrinkles.

  In this inspection line C, a dark colored vehicle and a light colored vehicle flow in a mixed state, and the inspection of the painted surface of the light colored vehicle will be described below.

  As shown in FIG. 5, when inspecting a light-colored vehicle, the emission color of the inspection device 1 on the coating surface S is switched to, for example, a natural white LED 20n to emit light.

  When the natural white LED 20n of the disc-shaped holding base 11 is selected to emit light, the natural white light flux L travels parallel to the optical axis and enters the convex lens 24, and the exit surface of the convex lens 24 And collected at the focal point of the convex lens 24.

  Thus, the light flux L collected at the focal point F of the convex lens 24 is applied to the painted surface S of the vehicle V.

  An operator visually inspects the presence or absence of color unevenness, wrinkles, etc. peculiar to the light-colored painted surface S from the degree of reflected light reflected by the painted surface S of the light-colored vehicle V. By switching the light source from the warm white LED 20w to the natural white LED 20n, color unevenness and wrinkles as a coating defect of the lightly painted surface S can be visually recognized.

  As described above, when inspecting the painted surface S of the vehicle V, the color of the light source to be irradiated can be changed according to the color of the painted surface S. This makes it easier to find coating defects and improves the detection rate.

  The inspection apparatus 1 can also be used for inspection inside the vehicle V, and the inspection is performed by switching to the light emission color of the green LED 20g. In addition, the green LED 20g is preferably used for detecting a coating defect on a dark red painted surface of light colors.

According to the above embodiment, the following coated surface inspection apparatus for a coated object and the coated surface inspection method for the coated object using the apparatus are realized.
That is, the coating surface S of the object to be coated is provided with the LED holding device 4 having the LED 20 as a light source capable of irradiating the emission color corresponding to the color of the coating surface S, and the coating surface S of the light irradiated by the LED 20 is provided. 1 is an inspection apparatus 1 for a coated surface S of an object to be inspected based on reflected light from the LED, and an LED holding device 4 includes a plurality of types of LEDs 20 having different colors. A holding base 11 for annular arrangement, a plurality of heat radiation plates 13, 14, 15 disposed behind the holding base 11 at a predetermined interval, and a holding base 11 and heat dissipation plates 13, 14, 15 are provided. An inspection apparatus 1 for a coating surface of an object to be coated, comprising a vertical rod 12 for inserting and fixing.

  In addition, a switching unit (for example, a dimming board 28, a switching lever 30) that can selectively switch the LED 20 to emit light among the plurality of types of LEDs 20 having different colors depending on the color of the coated surface of the object to be coated. ).

  Further, a dimming circuit (for example, a dimming substrate 28) for dimming light emitted from the LED 20 as the light source is provided.

  Further, an irradiation case 2 in which the LED holding device 4 is housed slidably along the longitudinal direction, and a battery 26 serving as a power source for the LED 20 are provided on the outer periphery of the irradiation case 2 so as to project obliquely. The handle 3 and an optical lens mechanism that is provided in the opening of the irradiation case 2 and changes the course of the light beam parallel to the optical axis irradiated from the LED 20 are provided.

  In addition, the irradiation case 2 is provided with an operation unit for sliding the LED holding device 4 back and forth.

  The coating surface S of the object to be coated is irradiated with a luminescent color corresponding to the color of the coating surface S from the light source in the inspection apparatus 1, and the coating surface S of the object to be coated is applied based on the reflected light from the coating surface S. A method for inspecting a painted surface of an object to be coated, which includes a step of visually determining whether or not there is a defect.

  Although the present invention has been described through the embodiment, the present invention is not limited to the embodiment, and the layout of the shape of each component is appropriately changed without departing from the gist of the claims. can do.

C Inspection line F Focus S Painted surface V Vehicle 1 Inspection device 2 Irradiation case 3 Handle 4 LED holding device 11 Holding base 12 Vertical beam 13, 14, 15 Heat sink 20 LED

Claims (6)

An LED holding device having an LED as a light source capable of irradiating a luminescent color corresponding to the color of the painted surface is provided on the painted surface of the object to be coated, and based on the reflected light from the painted surface of the light irradiated by the LED An inspection device for the coated surface of the object to be inspected.
The LED holding device is
A holding base for arranging a plurality of different types of LEDs in a ring shape;
A plurality of heat dissipating plates arranged at predetermined intervals behind the holding base;
A vertical gutter for inserting and fixing the holding base and the heat sink,
A device for inspecting the painted surface of an object to be coated. 2. The switch according to claim 1, further comprising: a switching unit that can selectively switch the LED to emit light among the plurality of types of LEDs having different colors depending on the color of the coated surface of the coating object. Inspection device for painted surface of paint. The device for inspecting the coated surface of an object to be coated according to claim 1 or 2, further comprising a dimming circuit for dimming light emitted from the LED. An irradiation case that houses the LED holding device slidably along the longitudinal direction;
A handle for accommodating a battery as a power source of the LED, which is provided obliquely on the outer periphery of the irradiation case, and
An optical lens mechanism provided at the opening of the irradiation case for changing the course of a light beam parallel to the optical axis irradiated from the LED;
The inspection apparatus of the coating surface of the to-be-coated object of any one of Claims 1-3 characterized by the above-mentioned. The operating device for sliding the LED holding device back and forth is provided in the irradiation case. The coating surface inspection device for an object to be coated according to claim 4. A luminescent color corresponding to the color of the coating surface is irradiated from the light source in the inspection device according to any one of claims 1 to 5 on the coating surface of the object to be coated, and based on the reflected light from the coating surface A method for inspecting a painted surface of a coated object, characterized by having a step of visually discriminating the presence or absence of a coating defect on the painted surface of the coated object.

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