JP2001283747A - Assembling apparatus for cathode-ray tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of elements for determining a timing for horizontally shifting a panel by a certain amount, and reduce dispersion factors by mechanically simplifying. SOLUTION: The apparatus has an operation converting mechanism for converting a matching operation of a panel 3 of a cathode-ray tube and a supporting structure of a color selecting mask to a position adjusting operation in either of holding fixtures thereof. In the operation converting mechanism, for example a contacting and moving means (a copy roller) 66 provided on the side of a panel holding fixture 20; a projection 42 fixed and projected on the side of a holding fixture 50 of the supporting structure; and cams 43, 44 fixed to the projection 42 and having a step S, which move in a state that the contacting and moving means 66 is contacted as both holding fixtures 20, 50 approach, are interlocked with the contacting and moving means 66. Butting means 59, 61 and 64 for adjusting a position of the panel 3 in the holding fixture 20 are provided for pushing the panel 3 toward y direction by an amount Δy specified by the step S, as both the holding fixtures approach.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cathode ray tube (CR)
The present invention relates to a cathode ray tube assembling apparatus which prevents interference between a panel pin provided on an inner wall surface of a panel and a side wall of a support structure by a simple mechanism when assembling the panel of T) and a support structure of a color selection mask.

[0002]

2. Description of the Related Art In assembling a color cathode ray tube,
A funnel-shaped glass tube that is generally called a funnel and a box-shaped glass part that is called a front panel and one of which is open
(Hereinafter simply referred to as a panel) are welded together with a frit glass interposed between the butted edges and integrated. Prior to this, it is necessary to form a phosphor on the inner bottom surface of the panel (the back side of the display surface), and then attach a support structure (support frame) for a color selection mask such as an aperture grill to the inner wall surface of the panel.

Usually, panel pins are provided on three or four sides of the inner wall surface of the panel, and correspondingly, leaf springs having pin holes are provided on three sides or four sides of the support frame of the color selection mask.
Welded on the sides. When assembling the support frame of the color selection mask into the panel, the support frame is housed inside the panel in a state where the leaf spring is urged inward and bent, and when the urging force of the leaf spring is released, the The flexure returns and the pin holes engage with the corresponding panel pins.
Then, the color selection mask and the phosphor pattern are accurately aligned, and the color selection mask and the support frame are welded.

By the way, for example, a small 9-inch CRT
When the support frame is housed inside the panel, the panel pins touch the outer edge of the support frame and interfere with each other because the outer dimensions of the support frame and the inner dimensions of the panel cannot be assured. It is easy to get things wrong.

In order to avoid this interference, usually a small C
In the RT, a panel pin and a leaf spring are arranged on three sides, and on two opposing sides thereof, the direction of the leaf spring is set so that the panel pin easily falls into the pin hole along the leaf spring from the same direction, that is, from the root side of the leaf spring. Same. And
At the time of alignment before assembling, utilizing the space margin caused by the leaf spring not being provided on one side,
The panel pins on the opposite side are slightly retracted to the outside of the support frame, and the panel is slightly shifted inward just before the support frame is housed in the panel.

FIG. 10 is a view showing a mechanism for slightly shifting the panel in the lateral direction in an apparatus for assembling a support structure for a color selection mask in a panel, which is a so-called landing machine.
FIG. 10A shows a top view, FIG. 10C shows a side view along the direction in which the panel is shifted (y direction), and FIG. 10B shows a side view along the x direction.

In the figure, reference numeral 100 denotes a panel, and the panel 100 is held below the panel holding plate 101 by holding means (not shown) with its open surface facing downward. A cylinder 102 is provided on the lower surface of the panel holding plate 101.
Is fixed, and the movable shaft (linear shaft) 103 of the cylinder 102 extends in the y direction toward the side surface of the panel 100. Butt pin 1 on the head of linear shaft 103
02a is provided, and the cylinder 102
02a is abutted against the side surface of the panel 100 to position the panel 100 in the y direction. The other end of the linear shaft 103 of the cylinder 102 extends outside the edge of the panel holding plate 101, and the other end has a vertical piece 1 long in the z direction.
04 is screwed. A learning roller 105 is provided at the tip of the vertical piece 104 so as to be rotatable about the axis.

On the other hand, a cam driving cylinder 106 is fixed to the upper surface of the panel holding plate 101. A cam stage 107 fixed to a movable shaft of a cam driving cylinder 106 has a cam 108
Is screwed.

In the y-direction panel position adjusting mechanism having such a configuration, the panel position with respect to the panel holding plate 101 can be slightly shifted in the y direction by an amount defined by the cam shape. FIG. 11 shows the positional relationship between the cam and the learning roller in the operation. When the abutment pin 102a is abutted against the side of the panel from the state shown in FIG. 10C, the learning roller 105 abuts on the cam 108 accordingly. This state is shown by a solid line in FIG. The cam 108 has a gentle step on its outer surface, and the cam 108 is in contact with the protruding side of the step. Thereafter, the holding force of the panel 100 on the panel holding plate 101 is x
Open in the y-plane. That is, the panel 100
Is in a state where it can freely move in the x direction and the y direction with respect to the panel holding plate 101.

A support frame for a color selection mask (not shown) is held by a holder below FIGS. 10B and 10C, and a panel holding plate 101 is directed toward the holder.
Is driven down by the elevator. At the final stage of the lowering operation, that is, immediately before the support frame is housed in the panel 100, the cam driving cylinder 106 operates to move the cam 108 in the x direction by a predetermined amount at a predetermined speed. FIG. 11 shows the state after the movement by two-dot broken lines. The learning roller 105 moves along the outer surface of the cam 108 due to inertia or a slight urging force acting on the cylinder 102. With this, learning roller 105
Moves slightly in the y direction by the size of the step (by Δy), and the panel 100 is pushed and shifted by Δy in the y direction.

In this assembling apparatus, the initial positioning before the movement of the panel 100 is set so as to be shifted by −Δy with respect to the center of the support frame of the color selection mask, and the operation is returned by Δy by the above mechanism at the final stage of the aligning operation. I do.
This prevents the tips of the panel pins provided on the inner wall surface of the panel 100 from interfering with the outer wall surface of the support frame of the color selection mask.

[0012]

However, the conventional cathode ray tube assembling apparatus has a problem that the timing for slightly shifting the panel 100 in the y direction is difficult.
This timing includes the lowering speed of the panel by the elevator, the timing at which a drive command is issued from the sequencer to the cam drive cylinder 106, the time from when the drive command is issued until the cylinder 106 actually operates (time lag), and The operating speed of the cylinder 106 is determined by four factors. Of these, the time from when the drive command is issued to when the cylinder 106 operates varies for each drive depending on the position of the shaft in the cylinder and the like, and thus cannot be measured, thus causing variation.

In the conventional cathode ray tube assembling apparatus, there are too many factors for determining the timing for slightly shifting the panel 100 in the y direction, and a timing shift is apt to occur due to mechanical play or the like, and adjustment is difficult. In addition, the occurrence of the above-mentioned variation factor is unavoidable mechanically, and conventionally, once a trouble occurs, it takes a considerable time to recover.

The present invention has been made in view of such circumstances, and has a reduced number of factors that determine the timing for slightly shifting the panel, as well as a mechanism that is simple and mechanically reduced to reduce variation factors, thereby enabling accurate operation and easy adjustment. It is an object of the present invention to provide an apparatus for assembling a cathode ray tube.

[0015]

SUMMARY OF THE INVENTION A cathode ray tube assembling apparatus according to the present invention is an assembling apparatus for assembling a panel of a cathode ray tube and a support structure of a color selection mask, and a panel holding device for holding the panel. Tool, a mask holder for holding the support structure of the color selection mask, a slide mechanism for changing the distance between the panel holder and the mask holder, the panel holder and the mask holder by the slide mechanism And a motion converting mechanism for converting the aligning operation into an operation for adjusting the position of the panel or the support structure in the holder. Each of the panel holding tool and the mask holding tool has a holding position adjustment mechanism for performing positioning of the panel or the support structure in the holding tool, and the holding position adjustment mechanism allows the panel and the support structure to be positioned. Positioning is performed in an initial state in which the central axis is shifted by a predetermined amount in one direction. Further, the motion conversion mechanism performs an operation of displacing the panel or the support structure by a predetermined amount in the holder in a direction in which both central axes coincide with each other when the two holders are brought closer to each other and a close distance is obtained.

Specifically, for example, the motion conversion mechanism includes a contacting means provided on one of the mask holders and the panel holder on the side of one of the holders; A projection protruding toward the holder, a cam fixed to the projection, and having a step which moves in a state where the contacting means comes into contact with each other as the holders approach by the slide mechanism; Butting means for pushing the panel or the support structure in one direction by an amount defined by the step as the two holders approach each other to adjust the position of the panel or the support structure in the holder.

The contacting means preferably comprises a learning roller rotatably held on one of the holders via a bearing. Preferably, the abutment means is fixed to the movable shaft, one end of which is used as an abutment pin of the holding position adjusting mechanism, and the other end side of which is provided with the contacting means, and the one holding tool. When the holding position adjustment mechanism sets the initial position of the panel or the support structure in the holding tool at the initial position, the movable shaft is driven to cause the butting pin to project by a predetermined amount, and the two holding tools are aligned by the slide mechanism. A cylinder for slidably holding the movable shaft. Further, the cam is attached to the projection with the first cam attached to the projection, and the step is formed by an amount of deviation from the first cam, and the cam is attached to the projection. A second cam capable of adjusting the size of the step depending on the position.

Alternatively, the outer shape of one of the holders may be used instead of the cam. That is, the motion conversion mechanism is provided on one of the mask holders and the panel holder on the side of one of the holders, and moves along the outer surface of the other holder as the two holders approach by the slide mechanism. The contacting means, and interlocking with the contacting means, pushing the panel or the support structure in one direction by an amount defined by the step of the outer surface as the two holders approach,
Butting means for adjusting the position of the panel or the support structure in the holder.

In the present invention, for example, a panel pin is formed on an inner wall surface of the panel, a leaf spring is formed on an outer wall surface of a support structure of the color selection mask, and the operation conversion mechanism holds the panel or the support structure. In the initial state, the tip of the panel pin retracts outside the outer wall surface of the support structure, and when the two holders approach each other and the tip of the panel pin approaches the leaf spring, the panel pin moves inward. It is set so that it moves and falls into the pin hole in the leaf spring.

Further, in the present invention, a plate spring pressing mechanism is provided on the other holding member side, which presses the plate spring in advance and urges the holding member inward when aligning the two holding members.

According to the cathode ray tube assembling apparatus of the present invention thus constituted, the position of the panel or the support structure can be adjusted by a mechanical mechanism linked to the operation of aligning the panel with the support structure of the color selection mask. Is done.

Specifically, first, the position of the support structure of the panel and the color selection mask in the holder is determined by the holding position adjusting mechanism provided on each holder. At this time, the center axis of the panel with respect to the support structure is shifted by a predetermined amount in a certain direction, for example, by Δy to the negative side in the y direction, and then the holders are brought closer to assemble the panel and the support structure.

When a cam is used, the cam moves in conjunction with a cylinder shaft fixed to one of the holders, and a learning roller rotatably supported by a projection extending from the other holder is provided. . The cam is constantly pressed against the learning roller by, for example, the inertia of the cylinder or a slight biasing force. For this reason, the learning roller moves along the outer shape of the cam as the two holders approach. In the course of the movement, the learning roller passes through a step provided on the cam, so that the cam is shifted inward (y direction) by the size of the step, for example, Δy. As a result, the cylinder shaft (linear shaft) connected to the cam slides slightly, and the butting pin at the tip pushes the panel in the holder and shifts it by Δy.

Since the timing of shifting the panel is determined by the cam shape and the mounting position, if the cam shape and the mounting position are optimized in advance, the panel is moved just before the support structure of the color selection mask fits in the panel.
The direction can be shifted by Δy. That is, the panel pin initially retreated to the outside of the support structure passes the outside of the upper edge of the side wall of the support structure, and shifts inward by Δy when approaching a leaf spring attached to the side surface thereof. For this reason, the panel pins fall into the pin holes formed in the leaf spring while avoiding interference with the side wall of the support structure,
A support structure is assembled in the panel.

[0025]

FIG. 1 shows the appearance of a cathode ray tube (CRT). FIG. 2 shows an assembly diagram of a panel and a support structure (support frame) for a color selection mask. CRT1
Is assembled by welding the butted edges of the funnel 2 and the panel 3 with the frit glass 4 interposed therebetween, and the inside is evacuated. In the funnel 2,
Components such as a magnetic shield are mounted, and an electron gun is inserted into the neck portion. In FIG. 1, the terminal 5 of the electron gun is taken out from the rear end face of the neck portion.

As shown in FIG. 2, the panel 3 has a substantially box shape in which one side is opened by setting up side walls on one side from four sides of a front glass plate serving as an image display surface. Although not shown, a laminated film including a carbon stripe and R, G, and B phosphor stripes sequentially and repeatedly arranged between the lines is formed on the inner surface of the front glass. It is necessary to arrange a color selection mask AG such as an aperture grill at a certain distance from the laminated film. For this reason, as shown in FIG.
A support frame 6 supporting G is attached to the inner surface of the side wall of the panel 3.

Specifically, three of the four side walls of the panel
Panel pins 7a, 7b, 7c are formed on the inner surfaces of the two side walls, and correspondingly, leaf springs 8 are provided on the side surfaces of the support frame 6.
a, 8b and 8c are welded. On the side surface of the support frame 6, a band-shaped portion near the color selection mask AG protrudes outward, so that an escape space for a panel pin head is formed on the electron gun side (rear side). Leaf springs 8a, 8b, 8c
Each of the bases has one side welded to the protruding surface of the side surface of the support frame 6, and through-holes (pin holes) 9a, 9b, 9c are formed at the free ends extending from the base.

In assembling the panel and the support frame, the leaf springs 8a, 8b, and 8c are pressed inward to accommodate the support frame 6 in the panel, and then the pressing force of the leaf spring is released to release each pin hole 9a. , 9b, 9c, the projections of the corresponding panel pins 7a, 7b, 7c are dropped. At this time, as shown in FIG. 2, if the length A ′ obtained by adding the leaf spring thickness to the distance from the center of the support frame to the side surface of the frame is slightly larger than the distance A from the center of the panel to the end of the panel pin, the assembly is physically impossible. I can't do it.

However, in particular, in a small CRT, the dimensional margin is hardly obtained. Therefore, in actual assembly, the panel is temporarily shifted slightly to the negative side in the y direction in FIG. 2 by utilizing the spatial margin created by the absence of the leaf spring on one side of the support frame 6. Immediately before combining with the support frame, an operation of returning to the direction in which the central axes match is performed.

FIG. 3 shows the operation of aligning the panel with the support frame. At the panel pin position B indicated by a dotted line in FIG. 3, if the pin is lowered as it is, the pin protrusion contacts the side wall of the support frame 6 (or the upper end surface of the leaf spring 8a), causing a problem of interference. Therefore, the panel 3 is connected to the support frame 6.
From the state where the center axes are aligned with each other, temporarily displace the panel 3 slightly toward the negative side in the y direction, press the leaf spring against the side surface of the support frame with the pseudo pin 27 or the like, and slowly lower the panel 3 to lower the end of the panel pin 7a. Is operated so as to return the panel to the positive side in the y direction by Δy when the panel approaches the side of the leaf spring 8a.

At about the same time when the pseudo pin 27 is pulled out,
While the leaf spring 8a comes in contact with the panel pin 7a to return by the elastic force, the pin projection falls into a pin hole 9a provided in the leaf spring 8a. At this time, since the leaf springs 8b and 8c are attached in the same direction at the other two places not shown in FIG. 3, the panel pins 7b and 7c are
B and 8c approach the pin holes 9b and 9c smoothly from the base side. Through such operations, the support frame 6 is housed in the panel 3 and assembled. After that, while keeping the distance between the color selection mask and the phosphor constant,
By welding a mask support (not shown) directly supporting the color selection mask AG into the frame of the support frame 6,
The arrangement of the color selection mask AG in the panel is completed.

The assembling apparatus for a cathode ray tube according to the present invention comprises:
This is a device for assembling the support frame into the mask while operating as shown in FIG. 3, and is called a so-called landing machine. Hereinafter, an embodiment of the cathode ray tube assembling apparatus will be described in detail with reference to the drawings.

FIG. 4 is a front view of the landing machine according to this embodiment. The landing machine 10 is roughly divided into a fixing tool (hereinafter, referred to as a frame holding unit) 20 for holding the support frame 6 of the color selection mask AG and a panel 20 positioned above the frame holding unit 20. 3 includes a holder (hereinafter, referred to as a panel holder) 50 for holding the panel holder 3 and an elevator (not shown) for bringing the panel holder 50 closer to the frame holder 20.

FIG. 5 is a top view showing the structure of the main part of the frame holding part, and FIG. 6 is a top view showing the structure of the main part of the panel holding part. As shown in FIG. 5, an arrangement space for the support frame 6 is provided substantially at the center of the plate 21 of the frame holding unit 20 fixed to the base 11.

A cylinder 22 and a motor 23 for positioning, and a cylinder 24 and a motor 25 for driving a pseudo pin are arranged in pairs on both sides of the arrangement space in the x direction. Each of these cylinders 23 and 24 has two horizontal linear movable shafts (horizontal linear shafts) vertically arranged and connected at both ends, and driving motors 23 and 25 are screwed to side surfaces of the cylinder body. ing. The rotating shaft of the motor extends rearward and is connected to two horizontal linear shafts via a connecting plate. A positioning pad 26 is fixed to an upper end of the front connecting plate of the positioning cylinder 22. The upper portion of the front connecting plate of the pseudo pin driving cylinder 24 is bent inward in an L shape, and a pseudo pin 27 is provided on an end surface thereof.

A cylinder 24 to which a pseudo pin 27 is fixed and a motor 25 for driving the same are arranged on the near side in the y direction of the arrangement space of the support frame 6 in the same manner as in the x direction. On the other hand, on the rear side, a cylinder 28 for driving the pressing pin and a motor 29 are arranged. A pressing pin 30 is screwed to the tip of the horizontal linear shaft of the cylinder 28.

A cam portion 40 is provided upright on the front side of the plate 21 in the y direction. As shown in FIG. 7, the cam portion 40 includes a cam support 41 screwed to the plate 21 and having an L-shaped cross section, a cam mounting base 42 screwed to the cam support 41, and a screw mounting to the cam mounting base 42. The first cam 43 and the second cam 44 are provided. Of these, the cam support 41 and the cam mounting base 42 are screwed at two vertically long holes, and the cam mounting base 42 and the first cam 4 are fixed.
3. The cam mounting base 42 and the second cam 44 are screwed at one vertical slot and one horizontal slot, respectively.

When the first cam 43 and the second cam 44 are arranged vertically, the first cam 4
The shape and mounting position of the cam are determined so that a step S is formed at the boundary between the third and second cams 44. The size of the step S can be changed by adjusting the mounting position of the first and second cams 43 and 44 to the cam mounting base 42 along the horizontal elongated hole. The relative position of the first cam 43 and the second cam 44 in the z direction is the first or second cam 4
It can be changed by adjusting the mounting position of 3, 44 along the longitudinal slot. Further, the first and second cams 43, 44
When it is desired to raise or lower the entirety while maintaining the relative position of, the cam mounting base 42 can be adjusted by moving the cam mounting base 42 along two vertically long holes with respect to the cam support 41. In the cam portion 40 having such a configuration, the first and second cams 43,
The relative position of 44 and the position adjustment in the z direction can be easily adjusted by adjusting the screwing position.

On the other hand, as shown in FIG. 6, an opening 51a slightly larger than the panel size is formed in the center of the plate 51 of the panel holder 50, as shown in FIG. On the upper surface of the plate around the opening 51a, three rotary actuators 52 for mounting the panel 3 transported in the x direction into the opening 51a are arranged. The opening 5
Lower supporting portions 53 for holding the four corners of the panel 3 are screwed to four places on the back surface of the plate around 1a. Each lower support portion 53 is provided with a round wall 53a corresponding to the corner shape of the panel, and the panel 3 can be freely shifted within an xy plane range regulated by the round wall 53a. The rotary actuators 52 are provided at two locations on the back side and one location on the front side in the y direction. By moving the respective arms, an arrangement space defined on the round wall 53a of the four lower support portions 53 is provided. The panel 3 is transported inside.

On one side of the back surface of the plate 51 in the x direction, x
Butt Cylinder 54 and Motor 55 for Directional Positioning
Is arranged. An x-direction abutment pin 56 is attached to the end of the horizontal linear shaft of the cylinder 54. A pressing cylinder 57 at the time of positioning in the x direction is arranged on the opposite side of the opening cylinder 51a. At the tip of the horizontal linear shaft of the cylinder 57, x
A direction pressing pin 58 is attached.

On the front side in the y direction of the back surface of the plate 51,
Butt cylinder 59 and motor 6 during y-direction positioning
0 are arranged on each of the left and right sides. Each cylinder 5
At the end of the horizontal linear shaft No. 9, a y-direction abutment pin 61 is attached. Also, this and the opening 51
On the contrary, one pressing cylinder 62 for positioning in the y direction is disposed on each of the left and right sides. At the tip of the horizontal linear shaft of each cylinder 62, a y-direction pressing pin 63 is attached. The two horizontal linear shafts 64 of the abutment cylinder 59 at the time of positioning in the y direction extend in parallel to the outside of the plate 51,
Both shaft tips are connected by a horizontally long horizontal link 65.

At substantially the center of the upper surface of the horizontal link 65, a learning roller 66 is rotatably provided via a holding component. The learning roller 66 is formed at a position where the panel holding portion 50 can come into contact with the first and second cams 43 and 44 of the cam portion 40 when the panel holding portion 50 approaches the frame holding portion 20.

Next, the operation of the landing machine 10 configured as described above will be described. Here, the operation of the mechanism for realizing the lateral shifting operation of the panel shown in FIG. 3 and described above will be described. 8 and the side view of FIG. 9 are shown in FIGS.
2 shows a portion related to the lateral shifting operation of the panel from the configuration of the landing machine 10 shown in FIG.

First, the panel 3 is positioned in the panel holding section 50, and the support frame 6 is positioned in the frame holding section 20. In the positioning of the panel 3, for example, first, the positioning in the x direction (not shown) is performed by using the cylinders 54 and 57 and the motor 55, and then the cylinder 59 is driven to cause the learning roller 66 to move the outer edge of the first cam 43. The butting pin 61 is pushed out in the y direction until it comes into contact with the upper surface. In this state, the push-up pin 63 is driven by the cylinder 62 to push the panel 3 toward the negative side in the y direction until the panel 3 comes into contact with the butting pin 61. On the other hand, in positioning the support frame 6, FIG.
Cylinders 22, 24, 28 and motors 23, 2 shown in FIG.
The position adjustment of the support frame 6 is performed by making full use of 5, 29 so that the center axis of the panel 3 positioned above is shifted by Δy in the y direction. At this time, the pseudo pin 27
Is inserted into the pin holes 9a, 9b, 9c of the corresponding leaf springs 8a, 8b, 8c of the support frame 6, thereby adjusting the inclination accurately and pressing the leaf springs to the side of the support frame as much as possible.

After the positioning is completed, the pins other than the contact pins 61 that are in contact with the panel 3 are retracted to release the force acting on the panel 3. Then, from this state, the elevator (not shown) is driven to slowly lower the panel holding unit 50 together with the panel 3. At this time, inertia or a slight urging force acting inwardly acts on the cylinder 59,
With this lowering operation, the learning roller 66 moves down the outer edge while maintaining the contact state with the first cam 43. In the state of R2 in FIG. 9 in which the learning roller 66 has reached the lower end of the outer edge of the first cam 43, the panel 3 is still down straight from the initial position. Immediately after that,
As shown by R3 in FIG.
When descending the step S formed between the cam 43 and the second cam, the abutment pin 61 projects in the y direction by the size of the step, so that the panel 3 shifts by Δy in the y direction and the panel position moves to P3. I do.

In this mechanism, the position in the z direction at which the panel shifts by y in the y direction is determined by the first cam 43 and the first cam 43.
It is determined by the height of the boundary of the cam 44. Therefore, by accurately adjusting the height of this boundary, that is, the position of the step S on the z-axis in advance, as shown in FIG.
The panel 3 can be shifted inward by Δy at the optimal point where the panel 3 approaches the leaf spring 8a. At about the same time, all the pseudo pins 27 are quickly retracted so as not to be in the way. Thereby, the leaf spring 8a is restored by the elastic force, and the pin hole 9a is engaged with the panel pin 7a. In the other two leaf springs 8b and 8c, the panel pins 7b and 7c are pin holes 9b and 9c from the base of the leaf spring.
Depressed approaching. As a result, the panel 3 is smoothly assembled with the support frame 6 while preventing interference with the side wall of the support frame 6 or the upper edge surface of the leaf spring.

In the cathode ray tube assembling apparatus according to this embodiment, as described above, the amount of displacement Δy of the panel is determined by the size of the step S between the first and second cams 43 and 44. The size of the step S is determined by the first and second cams 43 and 44.
Can be adjusted at the lateral mounting position on the cam mounting base. When it is desired to adjust only the height (position in the z direction) while maintaining the size of the step S, it is possible to adjust the height by adjusting the vertical mounting position of the cam mounting base 42 with respect to the cam column 41. Therefore, the adjustment is easy, and even if a trouble occurs in which the panel and the support frame interfere with each other, the recovery can be performed promptly.

[0048]

According to the apparatus for assembling a cathode ray tube according to the present invention, the aligning operation of bringing the panel and the support structure of the color selection mask close to each other is performed, for example, in a direction orthogonal to the aligning direction.
The operation is converted mechanically into an operation for adjusting the position of the panel or the support structure in the holder by the operation conversion mechanism. For this reason, in order to avoid interference with the side wall of the support structure, the operation timing of moving the panel pin closer to the leaf spring from the outside and moving the panel pin inward at the closest distance is almost the same as the speed at which both approach (the operation of the panel and support structure Speed) and
It is determined by the shape and mounting position of the cam. Therefore, the number of factors that determine the operation timing is smaller than in the past, and mechanical play is also significantly reduced. As a result, the operation for avoiding interference between the panel and the support structure can be accurately reproduced.

The size and position of the step of the cam are
For example, it can be adjusted by changing the cam shape or changing the mounting position of the cam. In particular, the cams are
In the case of using a cam, the size of the step can be adjusted by changing the relative position between the first cam and the second cam without newly manufacturing a cam. Therefore, in the assembling apparatus of the present invention, it is possible to adjust the interference avoiding operation timing in a visible manner, it is easy to adjust, and even if there is a trouble, it does not take much time to recover.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an appearance of a cathode ray tube (CRT) manufactured using an assembling apparatus according to an embodiment.

FIG. 2 is a view showing an assembly of a panel and a support structure (support frame) for a color selection mask, which is performed by the assembling apparatus of the embodiment.

FIG. 3 is a partially enlarged view showing an operation of aligning a panel and a support frame.

FIG. 4 is a front view of the assembling apparatus (landing machine) according to the embodiment;

FIG. 5 is a top view showing a main configuration of a frame holding unit in the assembling apparatus according to the embodiment.

FIG. 6 is a top view illustrating a main configuration of a panel holding unit in the assembling apparatus according to the embodiment.

FIG. 7 is a front view, a side view, and a top view showing a configuration of a cam portion in the assembling apparatus according to the embodiment.

FIG. 8 is a top view showing a part related to a lateral shifting operation of the panel extracted from the configuration of the assembling apparatus shown in FIGS. 4 to 6;

FIG. 9 is a side view showing a part related to a lateral shifting operation of the panel extracted from the configuration of the assembling apparatus shown in FIGS. 4 to 6;

FIG. 10 is a view showing a mechanism for slightly shifting a panel in a lateral direction, which is employed in a conventional assembling apparatus.

FIG. 11 is a diagram showing a positional relationship between a cam and a learning roller during an operation of shifting a panel in a horizontal direction in a conventional assembling apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cathode ray tube (CRT), 2 ... Funnel, 3 ... Panel, 4 ... Frit glass, 5 ... Terminal of electron gun, 6 ... Support frame (support structure of color selection mask), 7a, 7b, 7
c: panel pin, 8a, 8b, 8c: leaf spring, 9a, 9
b, 9c: pin hole, 10: landing machine (cathode ray tube assembling device), 11: base, 20: frame holder, 21: plate, 22, 24, 28, 54, 57, 59, 62 ...
Cylinder, 23, 25, 29, 55, 60 ... motor, 2
6 positioning pad, 27 pseudo pin, 30 pressing pin, 40 cam part, 41 cam support, 42 cam mounting base, 43 first cam, 44 second cam, 50 panel holding part 51: plate, 52: rotary actuator, 53: lower support, 53a: round wall, 5
6,61 ... butting pin, 58, 63 ... pushing pin,
64 ... horizontal linear shaft, 56 ... horizontal link, 66 ...
Learning roller, AG: color selection mask for aperture grill, etc., S: step.

Claims (10)

[Claims] 1. A cathode ray tube assembling apparatus for assembling a panel of a cathode ray tube and a support structure for a color selection mask, comprising: a panel holder for holding the panel; and a mask holding unit for holding a support structure for the color selection mask. Tool, a slide mechanism for changing the distance between the panel holder and the mask holder, and the operation of aligning the panel holder and the mask holder by the slide mechanism in the holder of the panel or the support structure. A cathode ray tube having an operation conversion mechanism for converting the operation into a position adjustment operation. 2. A cathode ray tube assembling apparatus according to claim 1, wherein each of said panel holder and said mask holder has a holding position adjusting mechanism for positioning said panel or said support structure in said holder. 3. The holding position adjusting mechanism performs positioning in an initial state in which the center axes of the panel and the support structure are shifted by a predetermined amount in one direction. 3. When the distance is reached, the panel or the support structure is shifted by a predetermined amount in the holder in a direction in which both central axes coincide.
An assembling apparatus for a cathode ray tube according to the above. 4. The movement conversion mechanism comprises: a contacting means provided on one of the mask holder and the panel holder; and a moving means fixed to the other holder and on the one holder side. A projecting projection, a cam fixed to the projection, and having a step which moves in a state where the contacting means comes into contact with each other as the two holders approach by the slide mechanism; 2. A cathode ray tube according to claim 1, further comprising: abutment means for pushing the panel or the support structure in one direction by an amount defined by the step as the tool approaches, to adjust the position of the panel or the support structure in the holder. Assembly equipment. 5. An apparatus for assembling a cathode ray tube according to claim 4, wherein said contacting means comprises a learning roller rotatably held via a bearing on said one holder. 6. An abutment means, one end of which is used as an abutment pin of a holding position adjusting mechanism, and the other end of which is fixed to the movable shaft having the contacting means attached thereto and the one holder. When the holding position adjustment mechanism sets the initial position of the panel or the support structure in the holding tool at the initial position, the movable shaft is driven to cause the butting pin to project by a predetermined amount, and the two holding tools are aligned by the slide mechanism. 5. The assembling apparatus for a cathode ray tube according to claim 4, further comprising a cylinder for slidably holding the movable shaft. 7. The cam includes a first cam attached to the projection, and the cam is attached to the projection in contact with the first cam, and the step is formed by an amount of deviation from the first cam. The size of the step can be adjusted by the attachment position to the part.
The apparatus for assembling a cathode ray tube according to claim 4, further comprising a cam. 8. The operation conversion mechanism is provided on one of the mask holders and the panel holder on the side of one of the holders, and the slide mechanism contacts the outer holder along the outer surface of the other holder as the two holders approach each other. A contacting means that moves while moving; and, in conjunction with the contacting means, pushes the panel or the support structure in one direction by an amount defined by the step of the outer surface as the two holders approach, and the panel or the support structure Abutting means for adjusting the position of the inside of the holder.
An assembling apparatus for a cathode ray tube according to the above. 9. A panel pin is formed on an inner wall surface of the panel, a leaf spring is formed on an outer wall surface of the support structure of the color selection mask, and a position of the panel or the support structure in the holder by the motion conversion mechanism. In the initial state, the tip of the panel pin retracts outside the outer wall surface of the support structure, and when the two holders approach each other and the tip of the panel pin approaches the leaf spring, the panel pin moves inward in the initial state. 2. The apparatus for assembling a cathode ray tube according to claim 1, wherein the apparatus is set so as to fall into a pin hole in a spring. 10. The apparatus for assembling a cathode ray tube according to claim 9, further comprising a leaf spring pressing mechanism for pressing said leaf spring in advance when said two holders are aligned with each other on said other holder side.