JPH087758A - Mounting device for color select mask and picture tube panel assembly inspecting method - Google Patents

Abstract

PURPOSE:To make location of a color selecting mask simply with reference to the panel fixed position by retaining a pin chuck of a mask locating mecha nism and a protruding piece on a mask mounting pin on a picture tube panel which is located and in a hole provided in a resilient support for the mask, respectively. CONSTITUTION:A picture tube panel 2 is located and fixed by three panel receptacle members 11 of a panel supporting mechanism 3, and a pin chuck 15 of a mask locating mechanism 5 is retained with a mask mounting pin 14 on the panel 2, and a protruding piece 17 is retained with a hole 16 provided in a resilient support 7 of a color selecting mask 4, which is thus located with reference to the panel 2. The mask 4 is clamped by a clamp member 27 through the action of a cylinder 26 of a clamp mechanism 6, and the support 7 of the mask 4 is pressed by a pressing plate 32 of a pressing mechanism 8. The two mechanisms 6, 8 are installed on an elevating stage and allowed to make elevating/sinking motions in a single piece. Thereby the mounting pin 14 is prevented from application of an excessive load when the panel 2 and mask 4 are to be located.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting device for a color selection mask used in a manufacturing process of a color picture tube and a method for assembling and inspecting a picture tube panel.

[0002]

2. Description of the Related Art Generally, in the process of manufacturing a color picture tube,
After the inner surface treatment of the picture tube panel and the inner surface treatment, a work of attaching a color selection mask called a shadow mask or an aperture grill to the picture tube panel is performed. FIG. 7 is a perspective view for explaining a conventional device therefor, and the operation procedure will be described below together with the configuration thereof. In the illustrated color selection mask attachment device 50, 51 is a panel receiving member for mounting a picture tube panel 52, 53 is a protrusion for positioning a color selection mask (aperture grill in the example) 54 by cylinder drive, 55 Is a holding plate that presses and holds the elastic support 56 of the color selection mask 54 inwardly by driving the cylinder, and 57 is the picture tube panel 5 that is driven by the cylinder.
2 is a pin receiving member for positioning 2.

When the color selection mask 54 is actually attached to the picture tube panel 52, first, the color selection mask 54 loaded by a mask transfer machine (not shown) is driven by cylinders from three directions respectively. 53 advance,
This is engaged with the hole 58 of the elastic support 56 fixed to the outer edge of the color selection mask 54 to position the color selection mask 54. Next, the color selection mask 54 positioned by the protrusions 53 is clamped by the driving of the cylinder group via the clamp member 59 and the like. Subsequently, the pressing plate 55 is advanced by driving the cylinder to press and hold the elastic support 56 of the color selection mask 54 inward of the mask, and at this time, the protrusion 53 is retracted from the hole 58 of the elastic support 56.

Next, the picture tube panel 52 is transferred to the panel receiving member 51 by a panel transfer machine (not shown). After that, the color selection mask 54 is arranged in the vicinity of the inner surface of the picture tube panel 51 by raising an elevating stage (not shown). Next, the pin receiving member 57 is raised by driving the cylinder,
This is brought into contact with the mask mounting pin 60 of the picture tube panel 52, and the picture tube panel 52 is slightly lifted from the panel receiving member 51 as it is. As a result, the picture tube panel 52
Is positioned by the pin receiving member 57, and in this state, the panel supporting rod 61 is raised by driving the cylinder to transfer the picture tube panel 52 from the pin receiving member 57 to the panel supporting rod 61.

After the picture tube panel 52 and the color selection mask 54 are positioned in this manner, the presser plate 5 is subsequently placed.
5 is retracted from the elastic support 56. Then, the color selection mask 5 is attached to the mask mounting pin 60 of the picture tube panel 52.
The holes 58 of the elastic support 56 of No. 4 engage with each other, whereby the color selection mask 54 is attached to the picture tube panel 52.
After that, the clamped state of the color selection mask 54 is released, and the elevating stage described above is lowered. Then
After taking out the picture tube panel 52 with the color selection mask 54, each component is returned to the initial origin position.

[0006]

However, in the above-mentioned conventional apparatus, since the picture tube panel 52 and the color selection mask 54 are positioned and fixed by using a large number of cylinders,
In addition to complicating the overall structure of the device, the individual components are closely packed together. Therefore, the maintainability of the device is poor and the reliability is poor, and the device itself is expensive. Further, since the mask mounting pin 60 of the picture tube panel 52 is lifted by the pin receiving member 57 to position the panel, the total weight of the picture tube panel 52 is at the contact portion between the mask mounting pin 60 and the panel receiving member 57. In addition, there is a risk that the mask mounting pin 60 and the embedded portion thereof may be damaged.

On the other hand, in the current picture tube panel assembly process,
Pin carbon (conducting carbon) is applied between the mask mounting pin 60 of the picture tube panel 52 and the metal back portion (not shown) around the mask mounting pin 60 so that a prescribed level of conducting state is obtained therebetween. . At that time, the mask mounting pin 60
The coating state (particularly the coating amount and coating area) of the pin carbon with respect to is an important factor for obtaining a good conduction state with the metal back portion.

Conventionally, however, the picture tube panel 52 coated with pin carbon has been pulled out by an operator from the in-line and the coating state of the pin carbon has been visually inspected. For this reason, there are inconveniences that the workers have variations in the criteria for quality judgment, and defective products flow out to the subsequent process due to visual inspection errors. In addition, it is difficult to perform a 100% inspection because it is extracted from the in-line, and in this respect also, it is difficult to surely prevent defective outflow to a subsequent process. Further, when the picture tube panel 52 is pulled out from the in-line by the operator's hand, there is a possibility that the picture tube panel 52 may be damaged due to an artificial handling error.

The present invention has been made to solve the above problems. A first object of the present invention is to provide a color selection mask on a picture tube panel with a simpler structure than before and without damaging the mask mounting pins. An object is to provide a mounting device for a color selection mask that can be mounted. A second object is to provide an assembling inspection method of a picture tube panel, which can easily inspect the coating state of pin carbon.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned first object, and can be attached to and detached from a picture tube panel having a mask mounting pin on an inner wall surface thereof. It is an apparatus for attaching a color selection mask provided with an elastic support having a large hole on the free end side. According to the present invention, a panel support mechanism for positioning and fixing a picture tube panel, a pin chuck disengageable with a panel mounting pin, and a protrusion disengageable with a hole of an elastic support member are provided. A mask positioning mechanism for positioning the color selection mask with respect to the picture tube panel by engaging the pin chuck with the hole of the elastic support and clamping the color selection mask positioned by the mask positioning mechanism. A pressing mechanism that presses and holds the free end side of the elastic support of the color selection mask clamped by the clamping mechanism inward of the mask, and an elevating mechanism that integrally elevates the clamping mechanism and the pressing mechanism. It is equipped with the equipment configuration.

The present invention was made to achieve the second object, and is a method for inspecting the coating state of pin carbon coated on the mask mounting pins of a picture tube panel. In the present invention, the resistance value between the mask mounting pins coated with pin carbon is measured, and whether the pin carbon coating state is good or not is determined by whether or not the measured value is lower than a preset upper limit resistance value. Taking the method.

[0012]

In the apparatus of the present invention, the pin chuck is engaged with the mask mounting pin of the picture tube panel positioned and fixed by the panel positioning mechanism, while the protrusion is engaged with the hole of the elastic support of the color selection mask. By doing so, the color selection mask is positioned on the basis of the fixed position of the picture tube panel. While clamping the color selection mask in this state, the free end side of the elastic support is pressed and held inwardly of the mask, and then the elevating mechanism arranges the color selection mask near the inner surface of the picture tube panel for elastic support. Release your body from pressure.
As a result, the hole of the elastic support is engaged with the mask mounting pin, and the color selection mask is mounted on the picture tube panel.

In the method of the present invention, the resistance value between the mask mounting pins coated with pin carbon is measured,
By comparing the measured value with a preset upper limit resistance value, it becomes possible to easily inspect the coating state of the pin carbon on the mask mounting pin.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a perspective view illustrating an embodiment of a color selection mask attachment device according to the present invention. The color selection mask attachment device 1 according to the present embodiment roughly includes a panel support mechanism 3 that positions and fixes the picture tube panel 2, and a mask positioning mechanism 5 that positions the color selection mask 4 with respect to the picture tube panel 2. A clamp mechanism 6 that clamps the color selection mask 4, a pressing mechanism 8 that presses and holds the elastic support 7 of the color selection mask 4, and the clamp mechanism 6 described above.
And an elevating mechanism (not shown) for integrally elevating the pressing mechanism 8.

The panel positioning mechanism 3 includes the picture tube panel 2
It is provided with three panel receiving members 11 for placing the two, two of which are arranged so as to be located at the panel corner portion and the other one is arranged so as to be located at the long side portion of the panel. There is. In this panel positioning mechanism 3, for example, as shown in FIG. 2, position changing cylinders 13 are attached to the upper ends of the columns 12 standing upright from the fixed portion of the apparatus. Further, the panel receiving member 11 is fixed to the output shaft of each cylinder 13, and the picture tube panel 2
The position of the panel receiving member 11 can be changed by driving the cylinder 13 according to the outer diameter of the cylinder. Further, on the outside of the panel receiving member 11, a plurality of clamp members (not shown) that move forward and backward with respect to the picture tube panel 2 by driving the cylinder are arranged in a state of facing the outer peripheral surface of the picture tube panel 2. . Then, these clamp members are abutted against the outer peripheral surface of the picture tube panel 2 by driving the cylinder, so that the picture tube panel 2 placed on the panel receiving member 11 is positioned and fixed.

The mask positioning mechanism 5 includes a picture tube panel 2
Pin chuck 15 that can be engaged with and disengaged from the mask mounting pin 14
And a protrusion 17 that can be engaged with and disengaged from the hole 16 of the elastic support 7 of the color selection mask 4. The pin chuck 15 is attached to the upper end of the copy plate 18. A mask positioning cylinder 19 is attached to the lower end of the copying plate 18, and the output shaft of the cylinder 19 is attached with the protrusion 17. Further, the copying plate 18 is supported by the holding plate 20 shown in FIG. That is, the copy plate 18
Is supported by a slide mechanism (not shown) incorporated between the holding plate 20 and the holding plate 20 so as to be vertically and horizontally movable from a predetermined center position. Further, the copy plate 18
As shown in FIG. 4, the spring is biased by the springs 20a from the four directions of up, down, left, and right, and is self-returned to the center position by the biasing force.
On the other hand, the holding plate 20 shown in FIG. 3 has a cylinder 22 horizontally attached to the vertical side of the L-shaped plate 21.
The output shafts of are connected. An output shaft of a lifting cylinder 23 is connected to the lateral side of the L-shaped plate 21.

The clamp mechanism 6 includes a horizontally movable mask mounting base 24 and a mask clamping cylinder 26 horizontally installed at an end edge of the mask mounting base 24 via a mounting plate 25. Equipped with the cylinder 26
A clamp member 27 is attached to the output shaft of the. Here, in this embodiment, the mask clamp cylinder 2 is used.
When 6 is driven, the clamp member 27 axially attached to the output shaft hits the color selection mask 14 from the horizontal direction, and then, a block (not shown) provided on the mask mounting large 24 in a state of facing the clamp member 27. The color selection mask 14 is clamped so as to sandwich the color selection mask 14.
Therefore, if the stroke of the cylinder 26 is secured to be larger than the size difference of the plurality of types of color selection masks 14, the position of the components is changed even when the size of the mask to be handled is changed, like the panel support mechanism 3. It is not necessary and can be applied to a plurality of types of color selection masks 14.

The pressing mechanism 8 includes the slide guide unit 2
8, a moving block 29 movably supported by the moving block 29, a ball screw shaft 30 fitted into the moving block 29 via a ball screw nut (not shown), and one end of the ball screw shaft 30 is connected via a coupling or the like. And a motor 31. Further, a pressing plate 32 is attached to one end of the moving block 29 so as to face the elastic support 7 of the color selection mask 14.

The elevating mechanism includes an elevating stage that moves up and down using, for example, a cylinder or a motor as a drive source, and the clamp mechanism 6 and the pressing mechanism 8 are mounted on the elevating stage.

Next, the operation of the device for attaching the color selection mask in this embodiment will be described. First, the color selection mask 4 is transferred to the mask mount 24 by a mask transfer machine (not shown), and subsequently the picture tube panel 2 is transferred to the panel receiving member 11 by a panel transfer machine (not shown). . Then, a clamp member (not shown) advances from the outside of the panel receiving member 11 and hits the outer peripheral surface of the picture tube panel 2 to position and fix the picture tube panel 2 as it is.

Next, by driving the cylinder 22 shown in FIG. 3, the pin chuck 15 advances toward the picture tube panel 2 side together with the copying plate 18 and the holding plate 20. After that, the driving of the cylinder 22 is stopped at the time when the pin chuck 15 enters inside the panel of the picture tube panel 2 with respect to the mask mounting pin 14. Next, the pin chuck 15 starts to rise together with the L-shaped plate 21 by driving the lifting cylinder 23, and thereafter, when the pin chuck 15 is arranged at the same height as the mask mounting pin 14 of the picture tube panel 2. The driving of the cylinder 23 is stopped. continue,
By driving the cylinder 22, the pin chuck 15 moves backward together with the copying plate 18 by a predetermined amount. As a result, the pin chuck 15 moves in the order of →→ in FIG.
It fits into the mask mounting pin 14 of the picture tube panel 2.

At this time, even if a slight displacement occurs between the mask mounting pin 14 and the pin chuck 15, the copying plate 18 slides vertically and horizontally depending on the displacement amount and the displacement direction ( To perform a copying operation)
The pin chuck 15 can be fitted into the mask mounting pin 14 smoothly. The picture tube panel 2
Although four mask mounting pins 14 are provided on the inner wall surface of the above, in this embodiment, the pin chuck 15 is fitted only to the mask mounting pins 14 of P1 to P3 shown in FIG. There is.

When the pin chuck 15 is fitted into the mask mounting pin 14 of the picture tube panel 2 in this way, the protrusion 17 advances toward the color selection mask 4 side by driving the positioning cylinder 19 subsequently. As a result, as shown in FIG. 5, the tip portion of the protrusion 17 engages with the hole 16 of the elastic support 7 fixed to the outer edge portion of the color selection mask 4, and the color selection mask placed on the mask mount 24. 4 positioning is performed. The positioning operation of the color selection mask 4 by the protrusion 17 is based on the position of the mask mounting pin 14 of the picture tube panel 2 fixed by a clamp member (not shown), and as shown in FIG. The pin chuck 15 is engaged with the mounting pin 14 and the protrusion 1 is inserted into the hole 16 of the elastic support 7.
The diameter φ of the protrusion 17 is set so as to be the same as the diameter φ of the mask mounting pin 14 on the vertical axis (L) when 7 is engaged.

Subsequently, the mask clamp cylinder 26 is driven with the protrusion 17 engaged with the elastic support 7 of the color selection mask 4. As a result, the clamp member 27 advances from the outside of the color selection mask 4 and directly hits the outer peripheral portion of the color selection mask 4 to clamp the color selection mask 4 positioned by the protrusion 17. Then, the motor 31
Drive the ball screw shaft 30 to rotate, and the moving block 29 engaged with this rotates the slide guide unit 2
While being guided by 8, it moves to the color selection mask 4 side.
After that, the pressing plate 32 attached to the moving block 29 contacts the elastic support 7 of the color selection mask 4 and presses the elastic support 7 inward as it is. At this time, the pressing plate 32 contacts the free end side of the elastic support 7 closer to the end edge than the hole 16, and the free end side thereof is in contact with the picture tube panel 2.
At the time when the mask 31 is located inside the mask mounting pin 14, the pressing state is maintained by stopping the driving of the motor 31.

When the positioning and fixing of the color selection mask 4 based on the fixed position of the picture tube panel 2 is completed, first, the cylinder 19 is driven to move the elastic support 7 to the protrusion 1.
7 is retracted, and then the pin chuck 15 is retracted from the mask mounting pin 14 by driving the cylinders 22 and 23 in the reverse movement route. Then, the clamp mechanism 6 that clamps the color selection mask 4 and the pressing mechanism 8 that presses and holds the elastic support body 7 ascend together with the driving of an elevating stage (not shown). As a result, the clamp mechanism 6
The color selection mask 4 clamped to the inner surface of the picture tube panel 2 is arranged near the inner surface of the picture tube panel 2, and the mask mounting pin 14 of the picture tube panel 2 and the hole 1 of the elastic support 7 of the color selection mask 4 are arranged.
9 and 9 are arranged coaxially.

Next, the ball screw shaft 30 is rotated in the opposite direction by the drive of the motor 31, and accordingly the holding plate 32 is moved to the outside of the mask together with the moving block 29. As a result, the pressing plate 32 separates from the elastic support 7, so that the elastic support 7 is released from the pressed state by the pressing plate 32, and the hole 16 of the elastic support 7 is formed in the mask mounting pin 14 of the picture tube panel 2. Engage.

When the color selection mask 4 is attached to the picture tube panel 2 by the engagement of the mask attachment pin 14 and the hole 16 of the elastic support 7 in this manner, the clamp member 27 that has been clamping the color selection mask 4 until then. Is retracted by driving the cylinder 26, and the clamped state of the color selection mask 4 is released. Then, as the lifting stage (not shown) is driven, the clamp mechanism 6 and the pressing mechanism 8 descend,
The clamp member that has clamped the picture tube panel 2 from the outside until that time retracts, and the fixed state of the picture tube panel 2 is released. After that, the picture tube panel 2 with the color selection mask 4 is moved to the panel receiving member 11 by a panel transfer machine (not shown).
Each component returns to the initial position when it is taken out from the. The color selection mask 4 is attached to the picture tube panel 2 by such a series of device operations.

By the way, as described above, in the prior art, the picture tube panel 2 coated with pin carbon is pulled out by an operator from in-line, and the operator visually confirms the applied state of the pin carbon to the mask mounting pin 14. Since it was inspected by confirmation, it is extremely difficult to reliably prevent the outflow of defective products to the subsequent process due to reasons such as variations in acceptance criteria, artificial inspection errors, and the difficulty of 100% inspection. Was said.

Therefore, the inventor of the present invention has the idea that the applied state of the pin carbon can be inspected by the resistance value between the mask mounting pins applied with the pin carbon.
An examination experiment was carried out to confirm this. Then, it was confirmed in the experimental results that a correlation is established between the coating state of the pin carbon on the mask mounting pin 14 and the resistance value between the pins. Further, the boundary level between the resistance value between the pins determined to be non-defective and the resistance value between the pins determined to be defective in the current visual inspection was set as the upper limit resistance value for the quality determination.

As a means for measuring the resistance value between the mask mounting pins coated with pin carbon, a commercially available tester (having a resistance measuring function) is used as a simple and specific example. When the operator presses the tester bar (probe) against the mask mounting pin and determines whether the applied state of the pin carbon is good or not depending on whether the measured value obtained by this is lower than the preset upper limit resistance value. Can be considered. By taking such means, it becomes possible to inspect the applied state of the pin carbon easily on the line without variation in the judgment standard by the operator.

As a further preferable means, in the configuration of the color selection mask mounting device 1 described above, as shown in FIG. 6, a measurement for measuring the resistance value between the mask mounting pins 14 using the pin chuck 15 as a probe. It is conceivable to add the device 33. In FIG. 6, two conducting wires 34a and 34b connected to the terminal portion of the measuring device 33 are metal pin chucks 1 corresponding to the mask mounting pins 14 of P1 and P2.
5 are connected respectively. Also, the pin chuck 15
An insulating member 35 is incorporated in the base portion of the pin chuck 15 to insulate the pin chuck 15 from other components (the copy plate 18 in this example). Normally, among the four mask mounting pins 14 provided on the picture tube panel 2, only the predetermined two mask mounting pins 14 are coated with the pin carbon. In this embodiment, since the mask mounting pins 14 of P1 and P2 are the targets of the application of the pin carbon, the lead wires 34a and 34b are connected to the pin chucks 15 corresponding thereto, respectively.

If such an apparatus configuration is adopted, the panel receiving member 11 is used in the series of mask mounting operations described above.
When the pin chucks 15 of the picture tube panel 2 placed on the upper surface are engaged with the pin chucks 15 respectively, as described above, the pin chucks 15 engaging with the mask mounting pins 14 of P1 and P2 are used as a measuring element. The resistance value between the pins can be measured by the measuring device 33. Furthermore, the resistance value obtained by this measurement is compared with a preset upper limit resistance value, and if the measured resistance value is lower than the upper limit resistance value, it is determined that a conduction state of a specified level is obtained and it is a good product. However, if the measured resistance value exceeds the upper limit resistance value, it can be determined that the product is a defective product because the conduction state at the specified level is not obtained.

As described above, if the measuring device 33 is added to the color selection mask mounting apparatus 1 in the present embodiment, it is possible to judge the quality of the pin carbon coating state during a series of mask mounting operations. Not only can the labor of the sampling inspection by visual confirmation be saved, but the defective product will not be leaked to the subsequent process due to an artificial inspection error. In addition, since it is possible to easily perform 100% inspection, it is possible to reliably prevent outflow of defective products to the subsequent process.

By the way, other than using the color selection mask mounting device 1 as described above, for example, although not shown,
A removable measuring element is installed on the mask mounting pin 14 on the conveying path of the picture tube panel 2, and the measuring element is engaged on the mask mounting pin 14 when the picture tube panel 2 is conveyed to a predetermined position. Even if the application state of the pin carbon is judged to be good or bad by measuring the resistance value between the pins, the same effect as described above can be obtained.

[0035]

As described above, according to the mask mounting apparatus of the present invention, the picture tube is positioned and fixed by the panel positioning mechanism, and the picture chuck panel is engaged with the pin chuck to attach the pin chuck to the picture tube. The color selection mask is positioned based on the fixed position of the picture tube panel by detecting the fixed position of the panel and engaging the protrusion with the hole of the elastic support of the color selection mask. Unlike the conventional apparatus, an excessive load is not applied to the mask mounting pins when positioning the picture tube panel and the color selection mask. Therefore, the color selection mask can be attached to the picture tube panel without damaging the mask attachment pin or the embedded portion thereof. In addition, since the drive source (cylinder group) for lifting the picture tube panel via the mask mounting pins is not required, the structure of the entire device is simpler than the conventional device, and maintainability and reliability are improved. In addition, the price of the device itself becomes cheaper.

According to the assembly inspection method of the present invention, the resistance value between the mask mounting pins coated with pin carbon is measured, and whether the measured value is lower than a preset upper limit resistance value or not. Since the quality is determined by the above, it becomes possible to easily inspect the coating state of the pin carbon on the mask mounting pin. As a result, the reference level of the quality judgment at the time of inspecting the applied state of the pin carbon becomes constant, so that the reliability of the inspection result is significantly improved. Also,
Since it is possible to easily inspect the applied state of pin carbon even on the line, it is possible to save the trouble of removing the work and avoid damage to the picture tube panel due to an operator's handling mistake. Furthermore, since it becomes possible to inspect all the pin carbon coating states, it is possible to reliably prevent the outflow of defective products to subsequent processes.

In addition, according to the mask attaching device of the present invention,
Since the pin chuck is used as a measuring element and equipped with a measuring device that measures the resistance value between the mask mounting pins, the state of pin carbon coating can be inspected during a series of device operations for mounting the color selection mask on the picture tube panel. It becomes possible.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating an embodiment of a color selection mask attachment device according to the present invention.

FIG. 2 is a diagram illustrating a panel support mechanism.

FIG. 3 is a diagram illustrating a mask positioning mechanism.

FIG. 4 is a diagram illustrating a supported state of a pin chuck and a protrusion.

FIG. 5 is a diagram for explaining the operation of the mask positioning mechanism.

FIG. 6 is a diagram illustrating additional functions in the device configuration of the embodiment.

FIG. 7 is a perspective view illustrating a conventional device.

[Explanation of symbols]

1 Color selection mask mounting device 2 Picture tube panel 3 Panel support mechanism 4 Color selection mask 5 Mask positioning mechanism 6 Clamping mechanism 7 Elastic support 8 Pressing mechanism 15 Pin chuck 16 Hole 17 Projector 33 Measuring instrument

Front page continuation (72) Inventor Kaoru Iwasaki 30 Inazawa, Oyamachi, Inazawa, Aichi Sony Inazawa Corporation

Claims (3)

[Claims] 1. An apparatus for mounting a color selection mask having an elastic support member having a hole on the free end side which is engageable and disengageable with the mask mounting pin on a picture tube panel having a mask mounting pin on an inner wall surface. A panel support mechanism for positioning and fixing the picture tube panel, a pin chuck releasable to the panel mounting pin, and a protrusion releasable to a hole of the elastic support, A mask positioning mechanism for positioning the color selection mask with respect to the picture tube panel by engaging the pin chuck with the pin and engaging the protrusion with the hole of the elastic support; A clamping mechanism that clamps the positioned color selection mask, and a free end side of the elastic support of the color selection mask clamped by the clamping mechanism is inwardly directed toward the mask. A pressing mechanism for pressing and holding the clamp mechanism and the pressing mechanism and the mounting system of the color selection mask, characterized by comprising an elevating mechanism configured to integrally lift a. 2. The apparatus for mounting a color selection mask according to claim 1, further comprising a measuring device for measuring a resistance value between the mask mounting pins using the pin chuck as a probe. 3. A method for inspecting a coating state of pin carbon applied to a mask mounting pin of a picture tube panel, comprising: measuring a resistance value between the mask mounting pins coated with the pin carbon, A method of assembling and inspecting a picture tube panel, comprising judging whether or not the applied state of the pin carbon is good or bad depending on whether or not the measured value is lower than a preset upper limit resistance value.