KR20020053634A - Apparatus for inspecting crt funnel assembly - Google Patents

Abstract

PURPOSE: A test apparatus of a funnel coupling body for cathode ray tube is provided to check height of a funnel, height of a neck, and consistency of an axis of the funnel and an axis of the neck on the basis of a triangle position formed on the funnel. CONSTITUTION: A flat support platform(20) is formed on an upper face of a main body frame(18). A plurality of column(27) is erected at a predetermined position apart from the main body frame(18). A plurality of wheel(24) and a brake portion(26) are formed at a bottom portion of the main body frame(18). A pad is inserted into the support platform(20). A predetermined stopper(22) is formed in the support platform(20). An elevation portion(30) is formed between a funnel coupling body(10) and the main body frame(18). The elevation portion(30) is formed with a slider(32), a main body bracket(34), an elevation cylinder(36), and a control bar(40). The column(27) is combined with a reference bar(29). A ball member is formed at an end portion of the reference bar(29). The second measuring member(41) is inserted between a slider(32) and the reference bar(29). The first measuring member(50) is formed on an upper portion of a neck. The third measuring member(63) is formed at an outside of the funnel coupling body(10).

Description

Inspection device for funnel assembly for cathode ray tube {APPARATUS FOR INSPECTING CRT FUNNEL ASSEMBLY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inspecting funnel assemblies for cathode ray tubes, and more particularly, to an apparatus for inspecting funnel assemblies for cathode ray tubes having a funnel and a neck coupled to a government of the funnel.

The cathode ray tube has a panel on which an image is formed, a funnel-shaped funnel attached to the back of the panel, and a neck coupled to the government of the funnel, in which an electron gun is accommodated.

Necks are generally classified into two types, a neck formed of a cylindrical hollow tube and a flare having a funnel portion enlarged at an end of the hollow tube. In the related art, the latter is mainly used to join the back side of the funnel using the latter flank, and after the neck is joined to the funnel, the funnel of the neck is cut to a predetermined length and an electron gun is inserted. However, the frequency of using the neck (flareless) formed of a cylindrical hollow tube that does not need to cut the funnel separately after being bonded to the funnel rather than using a neck (flare) in the roots is increasing.

Thus, after the neck is joined to the funnel (hereinafter referred to as "flareless" neck), the finished product called the funnel assembly through an inspection process for inspecting the height of the funnel, the height up to the end of the neck, and whether the funnel and the neck coincide with each other. After being released as, it is completed with cathode ray tube by combining with funnel.

However, the inspection process, that is, the height of the funnel, the height up to the end of the neck, and whether the funnel and the neck coincide with each other are just height measurements based on the bottom surface of the funnel.

Therefore, a new measurement that checks the height of the funnel based on the triangular position, the height to the end of the neck, and whether the funnel and the neck coincide with each other, which is the standard for the measurement of the funnel according to the dimension control of the funnel assembly. Patterns are also needed.

Accordingly, an object of the present invention is to provide a device for inspecting a funnel combination for a cathode ray tube, which is capable of inspecting the height of the funnel based on the triangle position formed in the funnel, the height to the end of the neck, and whether the funnel and the neck coincide with each other. will be.

1 and 2 are a perspective view and a side view of a funnel assembly for cathode ray tube,

Figure 3 is a side view of the inspection device of the funnel assembly for cathode ray tubes according to the present invention,

4 is an enlarged view illustrating main parts of FIG. 3.

* Explanation of symbols for the main parts of the drawings

10: funnel binder 12: neck

16: funnel 20: support platform

27: column 30: lifting and moving unit

41: second dial gauge 50: dial gauge

55 transfer unit 63 third measuring member

According to the present invention, there is provided a device for inspecting a funnel assembly for a cathode ray tube having a neck coupled to a funnel and a government of the funnel, the apparatus comprising: a support platform for supporting the funnel assembly; A plurality of columns erected and spaced apart from the support platform with the funnel assembly to be inspected therebetween; A reference bar coupled to an edge of the column in the axial direction of the column and having one free end contacting and maintaining a triangle position formed in the funnel assembly; And a measuring member arranged to be in contact with an upper end of the neck and measuring a height to an end of the neck based on the triangle position.

Here, it may be configured to further include a ball member provided in the end region of the reference bar in the cloud contact with the triangle position.

Supporting the measuring member, it may include a transfer unit for transferring the measuring member to the upper surface of the neck. At this time, the transfer unit, and at least one stand standing up with respect to the support platform; A support block horizontally disposed in an axial direction of the stand in an end region of the stand to support the measurement member; And an actuator disposed between the stand and the support block to move the support block up and down.

The above-described measuring member may be substituted by a dial gauge. However, of course, a gauge such as LVDT can also be used.

A slider disposed at a bottom of the support platform with an axis in a horizontal direction and movable up and down with the support platform; A main body bracket provided at the bottom of the slider; One end is coupled to the body bracket and the other end is coupled to the slider to have at least one lifting cylinder for lifting and lowering the slider relative to the body bracket, so that the funnel assembly can be easily moved to the inspection position.

On the other hand, it is possible to provide a second measuring member interposed between the slider and the reference bar to measure the height of the funnel with respect to the triangle position, wherein the measuring member also advantageously uses a dial gauge.

Further, a third measuring member which is arranged horizontally in the axial direction of the neck on the outer side of the funnel assembly to inspect the axis of the neck relative to the funnel, the measuring member at this time, depending on the displacement amount It is more effective to use it as a Linear Variable Differential Transformer.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figs. 1 and 2, the funnel assembly 10 is made up of a funnel-shaped funnel 16 and a tubular neck 12 that is coupled to its government. The lower portion of the funnel 16 is formed with a skirt portion 14 forming a seal edge for coupling with a panel (not shown), the predetermined position of the funnel 16 of the funnel 16 In order to check the height P, the height N to the end of the neck 12, and whether the funnel 16 and the neck 12 are aligned with each other, the so-called triangle position T which forms a reference line is Formed.

For convenience of explanation, hereinafter, the triangle position is "T", the height of the funnel 16 is "P", the height to the end of the neck 12 is shown as "N", the height of the funnel 16 ( The height N up to the end of the P and the neck 12 is defined as the height based on the triangle position T.

The inspection apparatus of the cathode ray tube funnel assembly 10 according to the present invention, as shown in Figures 3 and 4, from the main body frame 18 having a flat support platform 20 on the upper surface, and from the main body frame 18 It has a plurality of columns 27 which are arranged upright with a predetermined distance from each other.

The bottom of the main body frame 18 is provided with a plurality of wheels 24 that enable the movement of the main body frame 18 and a brake device 26 that selectively prevents rolling movement of the wheels 24. A display unit (not shown) for operating a measuring member to be described later or displaying signals from these measuring members to the outside is provided.

The support platform 20 for supporting the funnel assembly 10 is interposed with a pad 21 to protect the end surface when the funnel assembly 10 is seated. In addition, a predetermined stopper 22 is provided on one side of the support platform 20 to be in contact with the outside of the funnel assembly 10 so that the funnel assembly 10 can be disposed at a position on a predetermined center axis. On the other hand, between the funnel assembly 10 and the main body frame 18 is provided with an elevating movement unit 30 for elevating the support platform 20.

The elevating moving part 30 includes a slider 32 arranged at the bottom of the support platform 20 with an axis in the horizontal direction, and a main body bracket 34 fixedly coupled to the body frame 18 at the bottom of the slider 32. And a lift cylinder 36 provided between the slider 32 and the main bracket 34 to move the slider 32 up and down relative to the main bracket 34, and provided outside the lift cylinder 36. ) Has an adjustment bar 40 for adjusting the horizontal height.

The lifting cylinder 36 has a lifting cylinder body 37 fixed to the main body bracket 34, and a lifting cylinder rod 38 which can be extended and reduced in length from the lifting cylinder body 37 and whose end is coupled to the slider 32. Has Accordingly, when the working fluid is supplied to the lifting cylinder body 37, the lifting cylinder rod 38 is extended, and the slider 32 is moved upward, and the support platform 20 moves upward to a predetermined inspection position in conjunction with the lifting cylinder rod 38. While moving the funnel assembly 10 to a predetermined position.

In the column 27, a reference bar 29 is coupled horizontally in the axial direction of the column 27. The reference bar 29 serves as a reference for the measurement of the funnel assembly 10 when the end of the funnel assembly 10 reaches a predetermined inspection position by contacting the triangle position T. At this time, In the end region of the reference bar 29, a ball member 31 is provided to prevent the outer surface of the funnel assembly 10 from being damaged by the reference bar 29.

Between the slider 32 and the reference bar 29 is interposed a second measuring member for measuring the height P of the funnel 16 with respect to the triangle position T. A second dial gauge 41 is used as the second measuring member, and the second dial gauge 41 is coupled to the reference bar 29. Between the second dial gauge 41 and the slider 32, the axial rod 42 which can move up and down together with the slider 32 is engaged.

Accordingly, as described above, when the slider 32 is moved upward while the axis rod 42 is moved upward, the axis rod 42 is arranged at the end of the second dial gauge 41. Will come in contact with At this time, the second plunger 45 is elastically deformed while protecting the second measurer 43.

In this way, when the axis rod 42 contacts the second measurer 43, the second display portion 47 of the second dial gauge 41 displays a predetermined error value, and thus, the triangle position T The height P of the funnel 16 relative to) can be inspected. That is, if the error value is within the predetermined tolerance, the height P of the funnel 16 is considered normal, and if the error value is out of the predetermined tolerance, the height P of the funnel 16 is abnormal. It is regarded that the funnel assembly 10 at this time is discarded.

On the other hand, the upper portion of the neck 12 is disposed to be in contact with the upper end of the neck 12 is provided with a measuring member for measuring the height (N) to the end of the neck 12 based on the triangle position (T). In this embodiment, as the measuring member, a dial gauge 50, which is a kind of gauge for precisely measuring displacement by expanding a micro displacement with a gear device (not shown), is employed.

The dial gauge 50 has a rod-shaped plunger 51 provided on the support block 59 to be described later, and a display unit 52 disposed outside the support block 59 to display the measured value. An end portion of the plunger 51 is provided with a measurer 53 which measures an error with respect to a predetermined reference value by being in direct contact with the upper end of the neck 12. Here, the plunger 51 allows the measurer 53 to be elastically in contact with the neck 12 when it is in contact with the upper end of the neck 12.

The dial gauge 50 is coupled to the transfer unit 55. The transfer unit 55 is a stand 57 provided so as to stand up with respect to the support platform 20, and a plunger of the dial gauge 50 disposed horizontally in the axial direction of the stand 57 in the end region of the stand 57. And a support block 59 supporting the 51 and an actuator 60 disposed between the stand 57 and the support block 59 to move the support block 59 up and down. The actuator 60 has an actuator body 61 fixed to the stand 57 and an actuator rod 62 coupled to the support block 59, and in conjunction with the length extension of the actuator rod 62, the dial gauge ( 50 may be contacted and spaced from the upper end of the neck 12.

The outer side of the funnel assembly 10 is provided with a third measuring member 63 arranged horizontally in the axial direction of the neck 12 to inspect the axis of the neck 12 relative to the funnel 16. In this embodiment, the third measuring member 63 is employed as a linear variable differential transformer that outputs a voltage in accordance with the amount of displacement.

In the third measuring member 63, the measuring tip 65 protrudes from the main body housing 64 by a predetermined working fluid supplied from the working fluid supplying part 69 to contact the outer wall surface of the neck 12. At this time, a predetermined signal is generated and provided to a control unit (not shown). The control unit calculates the central axis of the neck 12 based on the signal value of the third measuring member 63, and then the funnel 16 It is compared with the central axis of. Here, an elastic member 67 is interposed between the main body housing 64 and the measuring tip 65 to prevent breakage of the measuring tip 65.

By this configuration, the operation of the inspection device for the cathode ray tube funnel assembly according to the present invention will be described.

First, when the funnel assembly 10 to be inspected is disposed on the support platform 20 by a separate transfer means, the working fluid is supplied to the lifting cylinder body 37 and the lifting cylinder rod 38 is extended to adjust the bar. With the help of 40 the slider 32 is moved upward. When the funnel coupling body 10 moves upward according to the upward movement of the support platform 20, at a predetermined position, the triangle position T of the funnel coupling body 10 is the ball member 31 of each reference bar 29. By being placed in, the reference bar 29 allows the inspection baseline to be achieved.

At this time, along with the upward movement of the slider 32, the axis rod 42 coupled to the slider 32 also moves upward while its end is in contact with the second measurer 43 of the second dial gauge 41. . Accordingly, the height P of the funnel 16 based on the triangle position T may be calculated as an error value in the second display unit 47.

Next, for measuring the height N to the end of the neck 12, the transfer unit 55 is operated. That is, when the working fluid is supplied to the actuator body 61 to reduce the length of the actuator rod 62, the support block 59 moves downward, and in conjunction with this, the measurer 53 of the dial gauge 50 While contacting the upper end of the neck 12, the height (N) to the end of the neck 12 based on the triangle position (T) is measured.

At this time, similar to the measurement of the height P of the funnel 16, when the error value shown on the display unit 52 is within a predetermined tolerance, the height N to the end of the neck 12 is determined with respect to the predetermined reference value. If it is regarded as normal and the error value is out of a predetermined tolerance, the height N up to the end of the neck 12 is regarded as abnormal and the funnel assembly 10 at this time is discarded.

When the height (P) of the funnel 16 and the height (N) to the end of the neck 12 is completed, the funnel 16 and the neck 12 are examined for axis alignment. That is, when a predetermined working fluid is supplied to the main body housing 64 of the third measuring member 63 to inflate the elastic member 67, the measuring tip 65 protrudes from the main housing 64 so that the neck 12 Contact with the outer wall surface. At this time, the control unit can calculate the central axis of the neck 12 based on the generated signal value, and the calculated central axis of the neck 12 is arranged in the support platform 20 by the funnel assembly 10 in the control unit. When compared, the axis of the neck 12 relative to the funnel 16 can be inspected by comparing it with the central axis of the funnel 16 that has already been measured.

As described above, according to the inspection apparatus of the present invention, the height P of the funnel 16 based on the triangle position T formed on the funnel 16, the height N to the end of the neck 12, and the funnel 16. ) And the neck 12 can be efficiently inspected whether the axis coincides with each other.

In the above-described embodiment, the height of the funnel, the height to the end of the neck and the alignment of the axis of the funnel and the neck are described in order of inspection, but this is for convenience of explanation only, the order of measurement of each other can be different. In addition, although the dial gauge is used to measure the height of the funnel and the height of the neck end, the LVDT may also be used.

As described above, according to the present invention, there is provided a device for inspecting a funnel combination for a cathode ray tube, which enables to inspect the height of the funnel based on the triangle position formed in the funnel, the height to the end of the neck, and whether the funnel and the neck are aligned with each other. Is provided.

Claims (8)

In the inspection device of a funnel assembly for a cathode ray tube having a funnel and a neck (flareless) coupled to the government of the funnel, A support platform for supporting the funnel assembly; A plurality of columns erected and spaced apart from the support platform with the funnel assembly to be inspected therebetween; A reference bar coupled to an edge of the column in the axial direction of the column and having one free end contacting and maintaining a triangle position formed in the funnel assembly; And a measuring member arranged to be in contact with an upper end of the neck and measuring a height of the neck to an end of the neck based on the triangle position. The method of claim 1, And a ball member provided in an end region of the reference bar and contacting the triangle position in a rolling contact with the triangle position. The method of claim 1, And a conveying unit for supporting the measuring member and transferring the measuring member to the upper surface of the neck. The method of claim 3, The transfer unit, At least one stand erected with respect to the support platform; A support block horizontally disposed in an axial direction of the stand in an end region of the stand to support the measurement member; And a actuator disposed between the stand and the support block to move the support block up and down. The method according to any one of claims 1 to 4, And the measuring member is a dial gauge. The method of claim 1, A slider disposed at a bottom of the support platform with an axis in a horizontal direction and movable up and down with the support platform; A main body bracket provided at the bottom of the slider; And at least one lift cylinder, one end of which is coupled to the main body bracket and the other end of which is coupled to the slider, to move the slider up and down with respect to the main body bracket. The method according to claim 1 or 6, And a second measuring member interposed between the slider and the reference bar to measure the height of the funnel with respect to the triangle position. The method of claim 1, And a third measuring member arranged horizontally in the axial direction of the neck on an outer side of the funnel assembly to inspect the axis of the neck with respect to the funnel.