KR20070003452A - Inspecting machine of seal and inspection method for the same - Google Patents

Abstract

An apparatus and a method for inspecting seals are provided to improve the reliability and the precision of the inspection by performing a seal inspection using a machine. An apparatus for inspecting seals includes a table(52), a detection unit(54), and a controller. The controller inspects the cast defect and the size of the seal by receiving an image signal of the detection unit. The detection unit includes a first detection unit and a second detection unit. The first detection unit is installed on one side of a table so as to detect a ground surface of the seal. The second detection unit is installed on the other side of the table so as to detect a lapped surface of the seal.

Description

Inspecting machine of seal and inspection method for the same}

1 is a perspective view showing an example of a typical seal,

2 is a cross-sectional view showing an example of a typical seal,

3 is a block diagram schematically illustrating a manufacturing process of a general seal;

Figure 4 is a block diagram showing the inspection device of the seal according to the present invention,

5a and 5b is a state diagram showing when the inspection device of the seal according to the invention is operated,

6 is a block diagram schematically showing a control configuration for the inspection device of the seal according to the present invention;

<Explanation of symbols on main parts of the drawings>

50: inspection apparatus 52: table

54: detection unit 56: controller

58: display device 60: alarm

62: seating portion 64: clamp

66: first motor 68: connecting rod

70: column 72: luminaire

74: camera 76: position setting means

77: vertical rod portion 78: contact portion

79: sensor unit 80: lifting means

82: second motor 84: mounting bracket

86: transfer mechanism 90: guide rod

92: guide pipe 94: guide rail

The present invention relates to an inspection apparatus and an inspection method of a seal, in particular, the casting defect and external dimension inspection of the seal is carried out by a mechanical device to improve the inspection reliability and accuracy of the seal and the unevenness of the inspection quality can be eliminated It relates to an inspection apparatus and an inspection method.

1 is a perspective view illustrating an example of a general seal, and FIG. 2 is a cross-sectional view illustrating an example of a general seal.

In general, a seal is installed between the seam and the gap of a part to prevent the fluid and gas from leaking out or entering the inside, and a sealing performance is secured between two relatively moving parts. In addition, specially designed seals are installed to prevent the relative motion of the components.

As shown in FIGS. 1 and 2, the seals may include two seals, which are installed on the two relative moving parts, and are in close contact with each other to simultaneously perform a sealing function and a bearing function.

That is, the seal 1 is the first seal (2) installed in any one of the two parts of the relative movement, and the two parts of the relative movement in close contact with the first seal (2) slidably It consists of the 2nd seal 4 provided in another one.

Thus, as the two parts move relative to each other, the first seal 2 and the second seal 4 slide in close contact with each other.

The first seal 2 and the second seal 4 are made of special alloy cast iron by special alloy precision casting technology and ultra-precision processing technology in the same shape with each other.

O-rings 6 made of rubber are additionally mounted on the outer surfaces of the first seal 2 and the second seal 4 as described above.

On the other hand, the opposing surfaces 2A and 4A of the first seal 2 and the second seal 4 are formed on the outer side of the lapping surface 10 so as to be in close contact with each other, and are formed on the inner side of the taper. It is divided into a grinding surface 12 formed to be.

The lapping surface 10 and the grinding surface 12 as the functional surface of the seal 1, the lapping surface 10 performs a sealing function, the grinding surface 12 is the lapping surface ( 10) to assist in the sealing function.

Looking at the manufacturing process of the general seal configured as described above are as follows.

3 is a block diagram schematically illustrating a manufacturing process of a general seal.

First, the mold of the seal 1 is made of a molding sand, and then a molten metal in which a special alloy cast iron is dissolved is injected into the mold (see S1 and S2).

When the special alloy cast iron injected into the mold is cooled, the seal 1 is detached from the mold, and the shot sand sintered to the cast-molded seal 1 is formed to have a smooth surface of the seal 1. Shot Blasting) is removed by the process (see S3).

Then, the outer and inner diameters of the seal 1 and the mounting surface of the o-ring 6 are machined by a grinding wheel, and the mapped seal 1 is heat treated to improve hardness. (See S4, S5.)

The heat-treated seal 1 is tapered by a grinding machine to form a grinding surface 12, and lapping is performed using a lapping machine to improve roughness and flatness to the outside of the grinding surface 12. The wrapping surface 10 is formed. (See S6, S7.)

The seal 1, which has been subjected to the grinding and lapping processes, is washed to remove impurities and then buffed to remove foreign substances from the grinding surface 12 and the lapping surface 10 (see S9).

As described above, the seal 1 from which impurities and foreign substances have been removed is selected as good or defective goods during the inspection process, and only the seal 1 selected as good quality is packaged (see S10 and S11).

However, the inspection method of the seal according to the prior art, because the casting defect or the external appearance of the seal 1 is inspected by the naked eye inspection of the operator, the objective reliability of the inspection of the seal 1 is lacking, the accuracy of the inspection There is also a problem that is lowered.

In addition, since the inspection quality and inspection time are different according to the operator's skill level because it depends on the human inspection, the inspection quality of the seal 1 is not uniform and the inspection time of the seal 1 is also increased. There is this.

The present invention has been made to solve the above problems, and an object of the present invention is to improve the reliability and accuracy of the inspection during the inspection of casting defects and dimensions of the seal, as the inspection operation of the seal is performed by a mechanical device, and the inspection quality It is to provide an inspection device and inspection method of the seal can be uniform, and the inspection time can be shortened.

The inspection device of the seal according to the present invention for realizing the above object is installed on the table and the seal is seated fixed to one side, the other side of the table is movable so that the light is irradiated to the inspection site of the seal And a sensing unit for sensing the inspection part of the irradiated seal as an image signal, and a controller for receiving an image signal of the sensing unit and inspecting a casting defect and an external appearance of the seal.

The inspection device of the seal is configured to further include a display device connected to the controller to display an image signal input to the controller on the screen, and an alarm for generating an alarm signal when a casting defect of the seal is detected by the controller. .

Here, one side of the table is provided with a seating portion for mounting the seal, the seating portion is provided with a clamp for fixing the seal.

The seating portion is provided with a first motor in the lower portion to be rotated at a constant speed.

The sensing unit may include a first sensing unit installed on one of the left and right sides of the table to detect the ground surface of the seal, and the other of the left and right sides of the table to detect the wrapped surface of the seal. It consists of a 2nd sensing unit installed in one side.

The sensing unit may include a column movably installed on the table, a luminaire installed on the column such that light is irradiated to the inspection portion of the seal, and an inspection portion of the seal irradiated with the luminaire. It consists of a camera that is detected as an image signal.

The column is horizontally moved to the table in the horizontal direction, and the luminaire and the camera are installed to vertically move in the vertical direction by the lifting means.

The elevating means is installed between a second motor fixed to one side of the column, an installation bracket in which the luminaire and the camera are installed, and the installation bracket and the second motor, thereby adjusting the installation bracket by the rotational force of the second motor. Consists of a transfer mechanism for feeding in the vertical direction.

The transfer mechanism has a guide rod having an upper end and a lower end rotatably installed on the column, and either one of the upper end and the lower end connected to the second motor, and a male thread formed on an outer circumferential surface thereof, and a female thread on an inner circumferential surface thereof so as to be engaged with the male thread of the guide rod. It is formed of a guide pipe which is formed and one side of the mounting bracket is connected to the outer circumferential surface, the guide rail is formed long in the column in the vertical direction so as to face the guide pipe and the other side of the mounting bracket is slidingly moved.

The installation bracket is provided with a position setting means for setting the initial position of the lighting device and the camera.

The positioning means includes a vertical rod part fixed to the mounting bracket to move up and down with the mounting bracket, a contact part installed at a lower end of the vertical rod part to contact the upper surface of the seal, and whether the contact part is in contact with the seal. It consists of a sensing unit mounted to the contact as possible.

On the other hand, the inspection method of the seal according to the present invention for realizing the above object is a fixing step that the seal is seated on the seating portion of the table and the seal is fixed by the clamp, and the lighting fixture and the camera as the inspection site of the seal Is transferred to set the luminaire and the camera at an optimal position, and light is irradiated to the inspection portion of the seal by the luminaire, and the inspection portion of the seal is sensed by the camera to transmit an image signal to the controller. A detection step of determining a casting defect and a dimension error of the seal by analyzing the video signal of the camera by the controller, a display step of displaying the image signal input to the controller through a display device, and It is characterized by consisting of an alarm that an alarm sounds when a casting defect of the seal is detected by the controller.

Here, in the setting step, the left and right position setting process in which the column is moved left and right along the table so that the lighting device and the camera is located above the inspection site of the seal, and the mounting bracket in which the lighting device and the camera are installed includes a second motor. And is moved up and down by a transport mechanism characterized in that it comprises a vertical position setting process of setting the inspection height of the lighting device and the camera.

In the up-and-down position setting process, the mounting bracket is lowered until the contact portion of the positioning means contacts the inspection portion of the seal, and when the contact of the seal and the contact portion is detected by the sensing unit of the positioning means, the mounting bracket This rises to a set height.

In addition, in the sensing step, the seating part is rotated at a constant speed by the first motor.

In addition, in the determining step, the image signal of the camera is analyzed as a pixel, and then the pixel is converted into dimensions to determine the external dimension of the seal.

Unlike the above, in the determining step, when the image signal of the camera is analyzed as a pixel and the inspection portion of the seal is processed as a black image having a predetermined value or more, it is determined as a casting defect.

In the determining step, when the casting defect of the seal is found, driving of the first and second motors is stopped.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 4 is a block diagram showing the inspection device of the seal according to the present invention, Figures 5a and 5b is a state diagram showing when the inspection device of the seal according to the invention is operated, Figure 6 is a seal of the seal according to the invention A control diagram for the inspection apparatus is schematically shown.

For reference, the same reference numerals are given to the same or similar components as the conventional components, and detailed description thereof will be omitted.

4 to 6, the inspection apparatus of the seal according to the present invention, the seal 52 is seated on one side and fixed to the table 52, the other side of the table 52 is installed to be movable After irradiating light to the inspection part of the seal 1, the detection unit 54 for detecting the inspection area of the seal 1 irradiated with the light as an image signal, and receives the image signal of the detection unit 54 A controller 56 for inspecting casting defects and appearance dimensions of the seal 1, a display device 58 connected to the controller 56 to display an image signal input to the controller 56 on a screen; It is configured to include an alarm 60 for generating an alarm signal when the casting defect of the seal 1 is found by the controller 56.

Here, the table 52 forms an upper surface portion of the inspection apparatus 50, and on one side, a seating portion 62 on which the seal 1 is mounted is formed, and the seating portion 62 has the seal ( A clamp 64 for fixing 1) is provided.

The seating part 62 is a plate-shaped member on which the seal 1 is seated. The seal 1 has a grinding surface 12 and a lapping surface 10 of the seal 1 positioned on an upper surface thereof. The seated part is connected to the first motor 66 so that the seating part 62 rotates at a constant speed.

That is, the first motor 66 is installed below the center of the seating part 62, and a plurality of connecting rods 68 is disposed between the bottom surface of the seating part 62 and the rotation shaft of the first motor 66. ). The plurality of connection rods 68 are disposed to be spaced apart in the circumferential direction about the rotation axis of the first motor 66.

The clamp 64 is installed to be movable in the plurality of transfer holes 62A formed in the seating part 62 to fix the seal 1 seated on the seating part 62.

The transfer hole 62A is formed in the seating part 62 so as to be spaced apart at the same angle in the circumferential direction, and is formed in the seating part 62 in the radial direction, and the clamp 64 is formed in the plurality of clamping holes. It is provided in the conveyance hole 62A so that a movement is possible, respectively.

Therefore, the plurality of clamps 64 are in close contact with the inner circumferential surface of the seal 1 to fix the seal 1 to the seating part 62.

The clamp 64 and the transfer hole 62A are preferably formed in three in the circumferential direction so that the annular seal 1 can be stably fixed.

In addition, the sensing unit 54 may include a first sensing unit 54A installed on either side of the left and right sides of the table 52 so as to sense the grinding surface 12 of the seal 1, and the seal ( The second sensing unit 54B is installed on the other side of the left and right sides of the table 52 to sense the lapping surface 10 of 1).

That is, the first sensing unit 54A and the second sensing unit 54B have a grinding surface 12 and a lapping surface 10 which are functional surfaces of the seal 1 when the inspection apparatus 50 is operated. It is installed so as to face the left and right sides of the table 52 about the seating portion 62 to be inspected.

The sensing unit 54 as described above is provided with a column 70 movably installed on the table 52 and a luminaire installed in the column 70 so that light is irradiated to the inspection portion of the seal 1. 72 and a camera 74 in which an inspection portion of the seal irradiated with light by the lighting device 72 is detected as an image signal.

The column 70 is installed to move horizontally in the horizontal direction in the table 52, the luminaire 72 and the camera 74 is perpendicular to the column 70 by the lifting means 80 in the vertical direction It is installed to be moved.

In addition, the elevating means 80 is a second motor 82 is fixed to one side of the column 70, the mounting bracket 84 is installed with the luminaire 72 and the camera 74, and the mounting bracket It is comprised between the 84 and the 2nd motor 82 and the conveyance mechanism 86 which transfers the said installation bracket 84 to an up-down direction by the rotational force of the said 2nd motor 82. As shown in FIG.

The mounting bracket 84 is provided with position setting means 76 for setting initial positions of the lighting device 72 and the camera 74.

The positioning means 76 as described above is a vertical rod portion 77 fixed to the mounting bracket 84 so that the lifting mechanism 86 can be elevated with the mounting bracket 84, the vertical rod A sensing unit 78 installed at a lower end of the unit 77 to be in contact with the upper surface of the seal 1, and mounted to the contact unit 78 such that contact between the contact unit 78 and the seal 1 is detected. It consists of a part 79.

The vertical rod portion 77 is a rod-shaped member vertically formed in the vertical direction, the mounting bracket 84 so that the lower end is disposed at a predetermined distance spaced downward from the lighting device 72 and the camera 74. In the middle part is fixed.

The contact portion 78 is a plate-shaped member formed in the horizontal direction at the lower end of the vertical rod portion 77, the contact bracket 84 is lowered in close contact with the upper surface of the seal (1) of the seal (1) Initial positions of the luminaire 72 and the camera 74 according to the height are set.

The detection unit 79 is a sensor for detecting whether the contact unit 78 is in contact with the seal 1, and various sensors may be applied according to an inspection condition and a manufacturing condition of the inspection device 50.

Specifically, for example, by detecting the voltage generated by the contact pressure of the contact portion 78 and the seal 1, it is possible to detect whether the contact portion 78 and the seal 1, the detection unit ( 79 may be formed of a piezoelectric element attached to the bottom surface of the contact portion 78.

Alternatively, the positive electrode and the negative electrode may be connected to the contact portion 78 and the seal 1 to detect whether the contact portion 78 and the seal 1 are in contact depending on whether the contact portion 78 and the seal 1 are energized. Are connected to each other, the sensing unit 79 may be formed of an ammeter connected to the contact portion 78 and the seal (1).

Alternatively, unlike the above, by measuring the overload applied to the second motor 82 when the contact portion 78 and the seal 1 contacts, so as to detect whether the contact portion 78 and the seal 1 is in contact, The detector 79 may be formed as an overload meter installed in the second motor 82.

The transfer mechanism 86 is a guide rod 90 and the guide rod 90 is rotated by the second motor 82, the male rod is formed on the outer circumferential surface of the column 70 is rotatably installed on the column 70, The female thread is formed on the inner circumferential surface so as to be coupled to the male screw of the upper side, and one side of the mounting bracket 84 is extended to the column 70 so as to face the guide pipe 92 and the guide pipe 92. It is formed of a guide rail 94 is formed so that the other side of the installation bracket 84 is slidingly moved.

One of the upper and lower ends of the guide rod 90 is connected to the rotation shaft of the second motor 82.

On the other hand, the controller 56 analyzes the image signal sensed by the sensing unit 54 with a pixel (Pixel), thereby inspecting the casting defect and the appearance dimension of the seal (1).

That is, the casting defect portion of the seal 1 is treated as a black image even when illuminated by the lighting device 72, so that the color of the pixel is analyzed and determined, and the external dimension of the seal 1 is converted into pixels. The size of the seal 1 is analyzed and judged by the pixel.

The display device 58 is a monitor of a personal computer connected to the inspection device 50, the camera 74 is a CCD (Charge Coupled Device) camera having excellent image quality, and the luminaire 72 is an LED light. It is an appliance.

Looking at the operation and effect of the inspection method of the seal according to the present invention configured as described above are as follows.

First, the seal 1 to be inspected is seated on the seating part 62 of the table 52, and a plurality of clamps 64 are in close contact with the inner circumferential surface of the seal 1 installed at the seating part 62. The seal 1 is fixed to the seating portion 62.

Then, the detection unit 54 for detecting the inspection site of the seal 1 is moved to the appropriate position according to the seal (1).

That is, the column 70 is moved in the left and right directions so that the contact portion 78 of the positioning means 76 is disposed above the grinding surface 12 and the lapping surface 10 of the seal 1, and the camera 74 is disposed. ) And the mounting bracket 84 provided with the camera 74 and the luminaire 72 are lifted by the transfer mechanism 86 so that the luminaire 72 and the luminaire 72 are disposed at an optimal height.

In particular, as shown in FIG. 5A, the mounting bracket 84 is moved downward by the transfer mechanism 86 until the contact portion 78 of the positioning means 76 contacts the upper surface of the seal 1. As a result, initial positions of the luminaire 72 and the camera 74 are set. 5B, the mounting bracket 84 is moved upward by the transfer mechanism 86 to the set height, so that the inspection position of the lighting device 72 and the camera 74 is determined by the seal 1. It is set to an optimal height for inspecting the grinding surface 12 and the lapping surface 10 of).

As described above, the initial positions of the lighting device 72 and the camera 74, which contact the contact portion 78 on the upper surface of the seal 1, are set first, and then the upper and lower positions of the lighting device 72 and the camera 74 are set. Therefore, according to the height change according to the kind of the said seal 1, the said lighting fixture 72 and the camera 74 are also suitably changed to the optimal inspection height.

As the rotation mechanism of the second motor 82 is driven in one direction, the transfer mechanism 86 also rotates the guide rod 90 connected to the rotation shaft of the second motor 82 in one direction, and the mounting bracket 84 is The connected guide pipe 92 is raised or lowered as the guide rod 90 is rotated in one direction.

Thus, the mounting bracket 84 is raised or lowered by the guide pipe 92 along the guide rail 94 formed in the column 70.

As described above, when the camera 74 and the luminaire 72 are moved to an optimal position for the inspection of the seal 1, light is irradiated to the inspection site of the seal 1 by the luminaire 72. In addition, the camera 74 detects an inspection part of the seal 1 irradiated with light by the luminaire 72 and transmits the image signal to the controller 56.

When the image signal is transmitted to the controller 56 by the camera 74, the controller 56 processes the image taken by the camera 74 into pixels and analyzes the image of the seal 1. Casting defects and dimensional errors are determined.

That is, in the determining step, the image signal of the camera 74 is processed as a pixel, so that the pixel is converted into dimensions to determine the external dimension of the seal 1, and the color of the pixel is equal to or greater than the set value. If it is processed as an image, it is considered as a casting defect.

Such a controller 56 displays an image signal input from the camera 74 as an image on the display device 58, whereby the inspection portion of the seal 1 can be confirmed by the naked eye of the operator.

On the other hand, since the seating portion 62 is rotated in one direction by the first motor 66 at a constant speed, the seal 1 is inspected by the lighting device 72 and the camera 74 over the entire area. In addition, the grinding surface 12 of the seal 1 is detected by the first sensing unit 54A of the sensing unit 54 and the seal (by the second sensing unit 54B of the sensing unit 54). The lapping surface 10 of 1) is detected.

Therefore, even if the detection area of the camera 74 is small, since the inspection is performed over the entire area by changing the detection area of the seal 1, the camera 74 can use a small product having a small shooting area.

As described above, when the casting defect and the dimensional error of the seal 1 are inspected, nonuniformity of the inspection time and inspection quality is reduced, and the reliability and precision of the inspection are improved as compared with the inspection method which depends on the naked eye of the operator as in the prior art.

If a casting defect of the seal 1 is found by the controller 56, the driving of the first motor 66 and the second motor 82 is stopped as well as the alarm 60 sounds at the same time.

As the driving of the first motor 66 and the second motor 82 is stopped, movement of the camera 74, the luminaire 72, and the seating part 62 is prevented, thus casting the seal 1. The camera 74 is stopped at the position where the defect is found.

When the alarm 60 rings, the operator hears the alarm even when the operator performs other tasks, and recognizes that the seal 1 having the casting defect is found, and the seal 1 displayed on the display device 58. The defective part of the seal 1 is checked by identifying a casting defect site of the die.

Therefore, the inspection work of the said seal 1 reduces the labor of a worker, and labor cost is also reduced.

The inspection device and the inspection method of the seal according to the present invention configured as described above is irradiated with light to the inspection site of the seal fixed to the table and then the inspection site of the light irradiated seal is detected as an image signal by the detection unit Since the controller inspects the casting defect and the external dimension of the seal by the video signal of the sensing unit, the inspection work of the seal is carried out by a mechanical device, thereby improving the inspection reliability and precision for the casting defect and dimension inspection of the seal, The inspection quality is uniform, and the inspection time is also shortened.

Claims (18)

A table on which the seal is seated and fixed on one side; A sensing unit installed to be movable on the other side of the table and detecting an inspection part of the seal irradiated with the light as an image signal after irradiating light to the inspection part of the seal; And a controller for receiving an image signal of the sensing unit and inspecting a casting defect and an external appearance of the seal. The method according to claim 1, The inspection device of the seal is connected to the controller and a display device for displaying an image signal input to the controller on the screen; And an alarm for generating an alarm signal when a casting defect of the seal is found by the controller. The method according to claim 2, One side of the table is provided with a seating portion for mounting the seal, the seating inspection device, characterized in that a clamp for fixing the seal is installed. The method according to claim 3, The seating unit inspection device of the seal, characterized in that the first motor is installed in the lower portion to be rotated at a constant speed. The method according to claim 1, The sensing unit includes a first sensing unit installed on either side of the left and right sides of the table to sense the ground surface of the seal; And a second sensing unit installed on the other side of the left side and the right side of the table to detect the wrapped surface of the seal. The method according to any one of claims 1 to 5, The sensing unit includes a column movably installed in the table; A luminaire installed on the column such that light is irradiated to the inspection portion of the seal; The inspection device of the seal, characterized in that consisting of a camera that detects the inspection portion of the seal irradiated with light by an image signal. The method according to claim 6, The column is installed on the table to move horizontally in the horizontal direction, the inspection device of the seal, characterized in that the luminaire and the camera is installed to move vertically in the vertical direction by the lifting means. The method according to claim 7, The lifting means includes a second motor fixed to one side of the column; An installation bracket on which the luminaire and the camera are installed; And a transfer mechanism installed between the mounting bracket and the second motor and configured to transfer the mounting bracket in the vertical direction by the rotational force of the second motor. The method according to claim 8, The transfer mechanism may include a guide rod having an upper end and a lower end rotatably installed on the column, and one of the upper end and the lower end connected to the second motor, and having a male thread formed on an outer circumferential surface thereof; A guide pipe having an internal thread formed on an inner circumferential surface thereof so as to be engaged with an external thread of the guide rod, and one side of the mounting bracket connected to an outer circumferential surface thereof; The inspection device of the seal, characterized in that the guide rail is formed long in the column in the vertical direction so as to face the guide pipe and the other side of the mounting bracket is slidably moved. The method according to claim 9, Sealing device, characterized in that the mounting bracket is provided with a position setting means for setting the initial position of the lighting device and the camera. The method according to claim 10, The positioning means includes a vertical rod portion fixed to the mounting bracket so as to be elevated with the mounting bracket; A contact part installed at a lower end of the vertical rod part and in contact with an upper surface of the seal; And a sensing unit mounted on the contact unit to detect whether the contact unit and the seal are in contact with each other. A fixing step in which the seal is seated on a seating part of the table and the seal is fixed by a clamp; A setting step of transferring a lighting device and a camera to an inspection part of the seal and setting the lighting device and the camera at an optimal position; A sensing step in which light is irradiated to the inspection part of the seal by the lighting device, and the inspection part of the seal is detected by the camera to transmit an image signal to the controller; A determination step of analyzing the video signal of the camera by the controller to determine the casting defect and the dimensional error of the seal; A display step of displaying an image signal input to the controller through a display device; And a warning step that an alarm sounds when a casting defect of the seal is found by the controller. The method according to claim 12, In the setting step, the left and right position setting step of moving the column from side to side along the table such that the lighting device and the camera is located above the inspection area of the seal; And an installation bracket in which the luminaire and the camera are installed is lifted by a second motor and a transfer mechanism to set an inspection height of the luminaire and the camera. The method according to claim 13, In the up-and-down position setting process, the mounting bracket is lowered until the contact portion of the positioning means contacts the inspection portion of the seal, and when the contact of the seal and the contact portion is detected by the sensing unit of the positioning means, the mounting bracket The inspection method of the seal, characterized in that raised to this set height. The method according to claim 12, In the detecting step, the seating portion is inspected by a seal, characterized in that the first motor rotates at a constant speed. The method according to any one of claims 12 to 15, In the determining step, the image signal of the camera is analyzed as a pixel (Pixel) and then the pixel is converted into the dimensions of the seal inspection method characterized in that the external dimensions of the seal is determined. The method according to any one of claims 12 to 15, In the determining step, the image signal of the camera is analyzed as a pixel (Pixel) when the inspection area of the seal is processed into a black image of a predetermined value or more, the inspection method of the seal, characterized in that it is determined as a casting defect. The method according to claim 17, In the determining step, when the casting defect of the seal is found, the inspection method of the seal, characterized in that the driving of the first and second motors is stopped.

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